CA2143902A1 - Device for producing moldings from, in particular, concrete - Google Patents
Device for producing moldings from, in particular, concreteInfo
- Publication number
- CA2143902A1 CA2143902A1 CA002143902A CA2143902A CA2143902A1 CA 2143902 A1 CA2143902 A1 CA 2143902A1 CA 002143902 A CA002143902 A CA 002143902A CA 2143902 A CA2143902 A CA 2143902A CA 2143902 A1 CA2143902 A1 CA 2143902A1
- Authority
- CA
- Canada
- Prior art keywords
- head
- exerting
- punches
- pressure
- head plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/08—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with two or more rams per mould
- B28B3/083—The juxtaposed rams working in the same direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
Abstract
Abstract:
Apparatus for producing moldings (16) from, in particular, concrete, the upper side of said moldings exhibiting zones which are at different levels, having an arrangement of at least three groups of punches (2, 13, 15, 19) with different press-in levels, the punches of any one group being fastened on one head plate (1, 11, 12), and the punches of the head plates which are arranged at a respectively higher level passing through the head plates located therebeneath. Each of the lower head plates (11, 12) is assigned guide rods (7, 8) which pass through at least the head plate which is arranged thereabove, and exhibit stops (9, 10) which limit the spacings between the head plates. The punches exhibit pressure-exerting pieces which are fastened, via round pressure-exerting rods (3, 14, 20), on the head plate which is assigned to them. The pressure-exerting pieces touch and guide one another with their side surfaces.
With the aid of tie rods which pass through all the head plates and, at the top, are fastened on a carrying plate, the head plates can be raised with the aid of compressed-air bellows and thereby drawn together.
Apparatus for producing moldings (16) from, in particular, concrete, the upper side of said moldings exhibiting zones which are at different levels, having an arrangement of at least three groups of punches (2, 13, 15, 19) with different press-in levels, the punches of any one group being fastened on one head plate (1, 11, 12), and the punches of the head plates which are arranged at a respectively higher level passing through the head plates located therebeneath. Each of the lower head plates (11, 12) is assigned guide rods (7, 8) which pass through at least the head plate which is arranged thereabove, and exhibit stops (9, 10) which limit the spacings between the head plates. The punches exhibit pressure-exerting pieces which are fastened, via round pressure-exerting rods (3, 14, 20), on the head plate which is assigned to them. The pressure-exerting pieces touch and guide one another with their side surfaces.
With the aid of tie rods which pass through all the head plates and, at the top, are fastened on a carrying plate, the head plates can be raised with the aid of compressed-air bellows and thereby drawn together.
Description
2 1 ~ 3 9 0 2 ; ~
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"Apparatus for producing moldings from, in particular, concrete" ,~
The invention relates to an apparatus for producing moldings from, in particular, concrete, the upper side of said moldings exhibiting zones which are at different levels, having a punch arrangement which is fitted into a molding box and comprises a plurality of puncheo which are arranged such that they can move -relative to one another in the vertical direction.
An apparatus of this type is known from European Patent Specification 0 118 872. This patent specification is concerned with the production of a molding which -- -`
exhibits a lower-lying annular surface running along the ~ -border. The punch arrangement thus comprises two part-punches, one punch being guided on the other punch, and a stop, which limits the movement of one par~.-punch ; ~ -towards the bottom, being arranged on the other part~
punch. In the case of a known two-part punch arrangement according to German Utility Model 87 14 786 too, one 20 part-punch is guided on the other part-punch and has its 5 movement clearance limited by stops.
This type of punch arrangement is not, however, suitable for moldings with a multiplicity of adjacent improssions at different levels. Rather, the known 25 designs are matched closely to the molding to be produced in each case, this resulting in non-commercially viable manufacturing and, in the event of a change in the molding to be produced, requiring re-designing again and again.
The object of the invention is to propose a -~
molding apparatus with a punch arrangement which permits simple adaptation to ldings, the surface area thereof being divided up in any manner, and which can be produced cost-effectively. --~
Taking as departure point an apparatus~of the type montioned in the introduction, this object is achieved according to the invention by the defining features of claim 1. In accordance therewith, the punch ~-arrangement, first of all, may exhibit three or more '`" ` ''. ~
'`'` ` r 2 1 ~ 3 9 0 2 - 2 ~
punch groups, depending on the number of molding surface zones at different levels. Each of the punch groups is fastened on a separate head plate, said head plates ideally being of the same size and being arranged paral~
lel to one another. In this arrangement, the punches of the head plate which i8 arranged at a respectively higher level pass through the head plates located therebeneath, e.g. in the case of three punch groups, the punches fastened on the uppermost head plate pass through the two other head plates and the punches of the central plate pass through the lowermost plate. In order to guide the head plates in a vertical direction, the lower head plates are assigned guido rods which pass through the head plate which is assigned to them and at least the head plate which is arranged thereabove, and exhibit stops which limit the spacings between the head plates.
Said stops are designed expediently as heads or as cross-pieces which are screwed on the lower end surfaces of the guide rods.
By virtue of using cross-sectionally round guide rods which may have a degree o$ play in the guide bores of tho head plates which amounts to 1 mm, problem-free manufacturing and assombly are possible.
In a further development of the invention, there are proposed punches which each comprise a pressure-exerting piece and one or more cross-sectionally likewise round preesure-exerting rods, the latter being fastened on the appertaining head plate. The pressure-exerting rods expediently have, at both ends, threaded shafts of a smaller diameter, by means of which, on the one hand, they are screwed into the pressure-exerting piece and, on the other hand, are plugged through the head plate and fastoned by a nut. Apart from the different lengths, the pressure-exerting rods are all the ~ame. They are fas-tened on the pressure-exerting piece at the center of gravity of the surface thereof. In the case of relatively large pressure-exerting pieces, a plurality of pressure-;~ exerting rods may bo used. Since all the pressure-exerting rods are fastened on head plates, it suffices to : ~: , 2 1 ~ 3 9 ~ 2 ~ provide the fastening bores thereof, at their correct location in each case, it being possible for thi~ to be carried out very cost-effectively and with a high degree of accuracy, in particular, with computer-assisted manufacturing machines.
Since the pressure-exerting rods ohould expressly not be used for guiding the lower-lying head plates, they pass through said head plates with play. It i~, however, proposed that the pressure-exerting pieces are at such a level, with respect to the movement of the adjacent pressure-exerting pieces, that, in every position, they can touch with their side surfaces and guide one another.
Their arrangement is preferably such that the punches which are fastened on the uppermo~t head plate and receive the advancement and vibratory forces directly from the punch ram penetrate into the molding material to the greatest extent. The head plates adjoining towards the bottom then, each bear shorter punches, which penetrate to a lesser extent from plate to plate. In order, however, that these punches which are fastened on :: :. ...~
ths lower head plates also reach their end position during the molding operation and are also sufficiently vibrated, there are fastened, on the lower head plates, spacer strips which, in the end posit.ion of the molding operation, come to bear on the head plate which is respectively located thereabove, and thereby transmit the forces to the best possible extent. A plurality of intersecting spacer strips are preferably provided, which are arranged such that the forces are transmitted uni-formly onto the plates located therebeneath and thepunches which are arranged thereon.
Cleaning of the pressure-exerting pieces, whorever possible after each molding operation, is extremely important for the quality of the ~oldings.
Cleaning is, however, difficult to carry out if the end surfaces of the pressure-exerting pieces are not located at a suitable level. For this reason, the stops on the guide rods are expediently set such that, in the de-molding position, when the lower head plates bear on said ~ ' ~ ::
-~ 2143902 : ::
:, .
"Apparatus for producing moldings from, in particular, concrete" ,~
The invention relates to an apparatus for producing moldings from, in particular, concrete, the upper side of said moldings exhibiting zones which are at different levels, having a punch arrangement which is fitted into a molding box and comprises a plurality of puncheo which are arranged such that they can move -relative to one another in the vertical direction.
An apparatus of this type is known from European Patent Specification 0 118 872. This patent specification is concerned with the production of a molding which -- -`
exhibits a lower-lying annular surface running along the ~ -border. The punch arrangement thus comprises two part-punches, one punch being guided on the other punch, and a stop, which limits the movement of one par~.-punch ; ~ -towards the bottom, being arranged on the other part~
punch. In the case of a known two-part punch arrangement according to German Utility Model 87 14 786 too, one 20 part-punch is guided on the other part-punch and has its 5 movement clearance limited by stops.
This type of punch arrangement is not, however, suitable for moldings with a multiplicity of adjacent improssions at different levels. Rather, the known 25 designs are matched closely to the molding to be produced in each case, this resulting in non-commercially viable manufacturing and, in the event of a change in the molding to be produced, requiring re-designing again and again.
The object of the invention is to propose a -~
molding apparatus with a punch arrangement which permits simple adaptation to ldings, the surface area thereof being divided up in any manner, and which can be produced cost-effectively. --~
Taking as departure point an apparatus~of the type montioned in the introduction, this object is achieved according to the invention by the defining features of claim 1. In accordance therewith, the punch ~-arrangement, first of all, may exhibit three or more '`" ` ''. ~
'`'` ` r 2 1 ~ 3 9 0 2 - 2 ~
punch groups, depending on the number of molding surface zones at different levels. Each of the punch groups is fastened on a separate head plate, said head plates ideally being of the same size and being arranged paral~
lel to one another. In this arrangement, the punches of the head plate which i8 arranged at a respectively higher level pass through the head plates located therebeneath, e.g. in the case of three punch groups, the punches fastened on the uppermost head plate pass through the two other head plates and the punches of the central plate pass through the lowermost plate. In order to guide the head plates in a vertical direction, the lower head plates are assigned guido rods which pass through the head plate which is assigned to them and at least the head plate which is arranged thereabove, and exhibit stops which limit the spacings between the head plates.
Said stops are designed expediently as heads or as cross-pieces which are screwed on the lower end surfaces of the guide rods.
By virtue of using cross-sectionally round guide rods which may have a degree o$ play in the guide bores of tho head plates which amounts to 1 mm, problem-free manufacturing and assombly are possible.
In a further development of the invention, there are proposed punches which each comprise a pressure-exerting piece and one or more cross-sectionally likewise round preesure-exerting rods, the latter being fastened on the appertaining head plate. The pressure-exerting rods expediently have, at both ends, threaded shafts of a smaller diameter, by means of which, on the one hand, they are screwed into the pressure-exerting piece and, on the other hand, are plugged through the head plate and fastoned by a nut. Apart from the different lengths, the pressure-exerting rods are all the ~ame. They are fas-tened on the pressure-exerting piece at the center of gravity of the surface thereof. In the case of relatively large pressure-exerting pieces, a plurality of pressure-;~ exerting rods may bo used. Since all the pressure-exerting rods are fastened on head plates, it suffices to : ~: , 2 1 ~ 3 9 ~ 2 ~ provide the fastening bores thereof, at their correct location in each case, it being possible for thi~ to be carried out very cost-effectively and with a high degree of accuracy, in particular, with computer-assisted manufacturing machines.
Since the pressure-exerting rods ohould expressly not be used for guiding the lower-lying head plates, they pass through said head plates with play. It i~, however, proposed that the pressure-exerting pieces are at such a level, with respect to the movement of the adjacent pressure-exerting pieces, that, in every position, they can touch with their side surfaces and guide one another.
Their arrangement is preferably such that the punches which are fastened on the uppermo~t head plate and receive the advancement and vibratory forces directly from the punch ram penetrate into the molding material to the greatest extent. The head plates adjoining towards the bottom then, each bear shorter punches, which penetrate to a lesser extent from plate to plate. In order, however, that these punches which are fastened on :: :. ...~
ths lower head plates also reach their end position during the molding operation and are also sufficiently vibrated, there are fastened, on the lower head plates, spacer strips which, in the end posit.ion of the molding operation, come to bear on the head plate which is respectively located thereabove, and thereby transmit the forces to the best possible extent. A plurality of intersecting spacer strips are preferably provided, which are arranged such that the forces are transmitted uni-formly onto the plates located therebeneath and thepunches which are arranged thereon.
Cleaning of the pressure-exerting pieces, whorever possible after each molding operation, is extremely important for the quality of the ~oldings.
Cleaning is, however, difficult to carry out if the end surfaces of the pressure-exerting pieces are not located at a suitable level. For this reason, the stops on the guide rods are expediently set such that, in the de-molding position, when the lower head plates bear on said ~ ' ~ ::
-~ 2143902 : ::
~ stops, the lower end surfaces of all the punches are located approximately in one horizontal plane. If a brush roll i8 then allowed to move through beneath the punches, then the bristles can clean off all the remaining molding material adhering to said punches.
Difficulties may ari~e when working with the molding apparatus -described if, as a result of the configuration of the molding, the pressure-exerting pieces of one punch group have to penetrate particularly deeply into the molding material in comparison with the rest. Penetration is made more difficult because the adjacent molding material cannot rise up without obstruc-tion, but is held back by the rest of the pressure-exerting pieces and is already pre-compacted. ~ pos-sibility for overcoming this difficulty consists in thefact that at least the lower head plate is supported with respect to the machine framework with the aid of ~pring arrangements, with the re~ult that, in the event of a molding operation, said head plate passes into its lower end position only after the rest of the head plates have come to bear thereon, exerting their bearing force thereon. The spring arrangements should at least have enough power for them to be able to bear the weight of the head plate and the punches thereof.
This results in the pressure-exerting pieces which are connected to the lowermost head plate coming to rest on the molding material only at an advanced state of the molding operation, that is to say at a point in time at which the more deeply penetrating pres~ure-exerting pieces have already passed virtually into their end position. When, for example in the case of three pres-sure-exerting plates altogether, the uppermost pressure~
exerting plate ha~ come to bear on the central pressure-exerting plate and the latter, in turn, has come to bear on the lowermost pressure-exerting plate, the ~pring arrangements are compressed, until finally all the pressure-exerting plates are located one upon the other and all the punches have reached their end positions. In the event of demolding, finally, the punches of the lower head plate~ first of all stay back when the uppermost head plate i~ raised. By virtue of the weight ef the second head plate and the punch thereof, the spring arrangements initially remain compre~ed. When the second head plate is then rai~ed, via the corresponding stops, then the third head plate follows on immediately, under the action of the spring arrangements. -~
This last-mentioned joint movement of the last punch groups too can also result in shortcomings during demolding. The aim should thus be that, during the molding operation, all the punches, from the start, assume the relative po~ition with respect to one another which, due to the desired configuration of the molding, they mu~t also assume at the end of the molding operation.
This is achieved, in accordance with a further proposal, in that the head plates are penetrated by tie rods which exhibit a stop at the lower end and, at the top, are fastened on a carrying plate, and that bellows which can be actuated by compressed air are provided in order to raise the carrying plate with re~pect to the uppermost head plate, with the result that all the head plates can be drawn together until they bear one against the other. This relative position of the pressure~
25 exerting pieces too is brought about by a corresponding -~
compressed-air control arrangement at the beginning of the lowering movement. Upon reaching the end position, air is rapidly extracted from the bellow~, with the ~;
result that the individual punch groups are then raised ~ : -from the molding in order.
It hai already been mentioned that the pressure-exerting pieces, which are suspended with their lower ends approximately in one plane after the demolding displacem~nt, can be cleaned by means of a brush roll. In this arrangement, it has occasionally turned out to be a particular advantage of the compressed-air control means that the cleaning operation may, if desired, also be carried out in an intermediate position, in the case of which, for example, the higher and more soiled ::
:' :
21~902 :: : ~ :
~ pressure-exerting pieces project downwards to a ~mall extent. This can be achieved, for example, by slow : - ;
filling of the bellows via a throttle valve.
The in~ention is described hereinbelow with reference to the drawing of preferred exemplary embodi-ments, the drawing depicting in each case a molding . :~
apparatus for producing so-called soundproofing panels as are used, for example, in soundproofing walls for fast roads. To be precise, in the drawing: ~ -Figure 1 shows a vertical partial section of a ~ :
first molding apparatus, at the end ; ~:~
stage of the molding operation, ~ :
Figure 2 shows, on a smaller scale, a view of the complete punch arrangement accor~
ding to Figure 1, Figure 3 shows a partial plan view of one of the head plate~, as is used in such punch :~
arrangements, ~ :~
Figure 4 shows a side view of a spring arrange~
ment, partially in section, for the -~
lowermost head plate, in another molding apparatus, Figure 5 shows an end view of the arrangement according to Figure 4, :
Figure 6 shows a partial view of a third molding apparatus, having a bellows which can be activated by compressed air and is --intended for drawing together the three head plates, and Figure 7 shows a plan view of the partial arrangement according to Figure 6.
For reasons of clarity, all the forms of punch are moved into one plane in Figures 1 and 2, 80 that the bore pattern according to Figure 3 does not correspond : :~;
35 thereto. " Figure 1 shows a portion of an upper head plate 1 on which a deeply penetrating, large pressure-exerting : ~;
p~ece 2 is fastened by mean~ of a pressure-exerting rod 3. The upper part of the pressure-exerting piece 2 i~
,.,., , . . , . , . , . . . . ~ - . . . . ` -2 1 ~ 3 9 0 2 ~ approximately in the form of a cube, and adjoining this towards the bottom is a four-faced wedge, the lower end surface having slightly rounded-off edges. The presRure-exerting rod 3 has, just as the others, a round cross-section and an integral threaded shaft at both ends. The lower, somewhat shorter threaded shaft 4 i8 screwed into a blind hole of the pressure-exerting piece 2 and i6 secured by means of an adheRive. In order, in this arrangement, to be able to retain the pressure-exerting rod, faces 5 are milled on two opposite sides. The upper threaded shaft 6 is plugged through a bore in the head plate 1 and fastened by means of a nut, precise angular alignment being possible.
The head plate 1 according to Figure 1, further-more, bears two downwardly projecting guide rods 7 and 8of different lengths. Said guide rods are inserted, up to their flat heads, in locating bores of the head plate 1, and stop disks 9 and 10 are screwed onto their lower end surfaces. The guide rods 7 and 8 serve for guiding a central head plate 11 and a lower head plate 12. The bore~ thereof have a degree o$ play of approximately 1 mm with respect to the guide rods. While in each case only one guide rod is shown in Figure 1, provision is actually made, ~at suitable locations, for as many guide rods as are necessary, in practice, for this purpose.
The central head plate 11 bears a pressure-exerting piece 13 which is of a sguare outline and has a smooth underside. Said pressure-exerting piece 13 is fastened, in the abovedescribed manner, on the head plate 11 by means of a somewhat shorter pressure-exerting rod 14. Furthermore, there i~ positioned, on said preesure~
exerting plate 11, a pressure frame 15 which ~hapes the peripheral border strip of the surface of the sound-proofing panel 16 to be manufactured. The pressure frame co~prises indlvidual rectilinear parts which are connected to one another by screwed-on connecting strips 17. The pressure frame has, on the under~ide, a peri-pheral triangular rib 15a which shapes the border bevel of the soundproofing panel 16. The preeeure frame 15 is ::: ~: .
21~3902 ~ ~
~ suspended on the head plate 11 via a plurality of pres-sure-exerting rods 18 which are of a smaller diameter than the rest, for which reason a collar 18a is integrally formed at the upper end of each pressure-exerting rod, in order that use can be made of the same thread as for the rest of the pressure-exerting rod~.
Finally, a pre~sure-exerting piece 19 i8 fastened on the head plate 12 via a pressure-exerting rod 20, ~aid pressure-exerting piece 19 having the same outline as the pressure-exerting piece 13, but exhibiting, on its underside, a triangular rib l9a which runs around all four borders and forms a bevel on the molding. The pressure-exerting piece 19 penetrates to the least extent into the molding composition and thus forms those parts of the molded soundproofing panel 16 which project upwards to the greatest extent, the edges of which are thus protected.
You are expressly referred to the fact that the through-passage openings in the head plates 11 and 12 for the pressure-exerting rods 3, 14, 20 permit play of 2.5 mm around said rods. The head plates 11 and 12 thus do not guide the punches. Rather, the pressure-exerting pieces 2, 13, 15 and 19 are guided, during their vertical movement, by bearing directly one on the other.
Also indicated in Figure 1 is a side wall of the molding box 21 as well as a vibrating table 22.
The relative position of the punches with respect to one another which is represented is obtained by virtue of spacer strips 23 and 24 which are each fitted on the head plato~ 11 and 12. In Figure 3, for example, the arrangement of said strips 23 is represented in plan view. In order to distribute the downwardly pressing force~ on the head plates as uniformly as possible, provision is made for a central longitudinal strip 23a, two parallel longitudinal strips 23b on both sides, and two transverse strips 23c. These are all at the same level. In the position shown in Figure 1, the spacer strip 23 bears on the head plate 1, and the spacer strip 24 bears on the head plate 11.
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~If the punch arrangement shown in Figure 1 is drawn upwards for demolding, then only the pres6ure-exerting pieces 2, fastened on the upper head plate 1, move initially. When, finally, this movement has pro-gressed to such an extent that the stop disk 9 of the guide rod 7 comes to bear on the head plate 11, said head plate 11 is also carried along, and thus also the pres-sure frame 15 and various pressure-exerting pieces 13. In this arrangement, account should be taken that the 10 opening in the lower head plate 12, which is penetrated ~;
by the guide rod 7 according to Figure 1, has a diameter large enough for the stop disk 9 also to pa~s through it with a large degree of play. After further movement, the stop disks 10, finally, carry the head plate 12 along with them, with the result that the pressure-exerting piece 19 is then also raised from the molding, and thus all the pressure-exerting pieces and the pressure frame -15 are in the raised state. ~ -~
This position is shown in Figure 2. The es~ential ;~
factor here is that the lower end surfaces of the pressure-exerting pieces are essentially all located in one horizontal plane and can thus be satisfactorily cleaned, for example, by means of a brush roll fitted on the filling carriage of the molding machine. -It can be seen in Figures 2 and 3 that, by means of the punch arrangement given in this example, four soundproofing panels can be molded with one displacement.
Four prossure framee 15 are provided. The molding box is correspondingly configured with two central walls ~-arranged in the form of a cross.
It can finally be seen in Figure 2 that the head plate 1 is carefully reinforced by a complex rib struc-ture. This structure, also called load, comprises a load plate 25 into which two king pins 26 are inserted. Said upwardly projecting pins with milled-out cross-slots are receivod by a quick-action clamping device which draws the load plate 25 into close contact with the ram plate of the molding machine. Reinforcing ribs 27 and 28, which run in the form of a cross and, in order to cut down on :-.. , ~ . . . , , ~
~?, `
2~43902 ~ weight, are provided in certain area~ with window cutout~
29, connect the load plate 25 to the head plate 1.
Figures 4 and 5 show a ~pring and stop arrange-ment of a further molding apparatus, of which the lower head plate 12' of likewise three head plates is repre-sented only in Figure 5. Said head plate is, with this arrangement, supported with respect to a frame profile 30 of the relevant machine frame. An angled-off bracket 31 which projects beyond the frame profile 30 i8 welded on the head plate 12'. Fastened on the frame profile 30, at this location, is a rubber-metal vibration damper 32. A
spring housing 33 is screwed beneath the bracket 31. Said housing has a contral, higher part and i8 reduced in height on both sides (Figure 4) by lower cutouts 34. The central part has three vertical bores in which three push rods 35 are mounted such that they can be displaced longitudinally. They are pushed downward~ by in each case one helical spring 36, said helical springs being BUp-ported, at the top, on the bracket 31 and, at the bottom, on a central collar of the push rod~ 35. In order that the push rods 35 are not pushed out, the bores each have, at the bottom, a shoulder against which the collar of the respective push rod butts. Inserted into the end parts of the spring housing 33 is in each case one stop screw 37, which can be adju~ted by means of a lock nut.
In the relieved position according to Figure 5, the push rods 35 are pushed out of the housing 33, with the result that the head plate 12' assu~es a higher position than in Figure 4, and the stop screws 37 are free at the bottom. When, however, during the molding operation, the upper head plate presses on the lower head plate 12' via the central head plate, then the spring arrangement yields, the push rods are di~placed into the spring housing 33 and, finally, the ~top ~crews 37 also come to bear on the rubber-metal vibration damper 32.
This is, then, tho end position, shown in Figure 4, of the head plate 12' after the molding operation.
Of the molding apparatus according to Figures 6 and 7, all three head plates 1, 11 and 12 are represented 21~39~-~
in Figure 6. Two pressure-exerting rod~ 3, which run downwards from the upper head plate 1 and are intended for the large pressure-exerting pieces 2, are indicated.
The central head plate 11 is suspended, in this demolding position, on the head plate 1 by means of the guide rods 7. In contrast to the example according to Figure 1, however, a guide rod 8, which defines the maximum spacing between the head plate 1 and the head plate 12, i~ not provided. Instead, however, provision is made for a longer tie rod 38 which also passes through the head plate 1 and, at the top, is fastened on a carrying plate 39. Said carrying plate 39, which is elongated in the manner of a rail in accordance with Figure 7, is, at the end which is shown and at the other end which is not shown, supported, via a bellows 40, on a plate 41 which is screwed on the head plate 1. For supporting at a definod level when the bellows 40 is in the relieved state, an upright flat profile 42 is welded onto the head plate 1.
The bellows 40 may be activated by compressed air via a supply line 43. In this arrangement, the bellows expand to such an extent that the carrying plato 39 is raised to the uppor position indicated by chain-dotted lines. In this arrangement, the tie rod 38 then draws up the lower head plate 12 until its spacer strip 24 butts against the central head plate 11, and then draws up the two head plate~ until the upper spacer strip 23 butts against the head plate 1. The punches are thus in the relative position shown in Figure 1, said position, in this case, having been forced already at the beginning of tho downwards displacement and being maintained until the end of tho molding operation. The pressure-exerting pieces 2 can conseguently penetrate more ea~ily into the molding material and/or the displaced molding material can yield to a better extent. When the end position is reached, air is rapidly extracted from the bellows 40, with the result that the demolding operation takes place precisely as in the case of the molding apparatus according to Figure 1, i.e. the respective punch groups ''-: .
.. ~ .. , . . - . . , .. . - . .
~ 21~390~ ~
- 12 - .
of the head plates 1, 11 and 12 are drawn upwards in order. Advantageou~ly, activation of the bellows 40 by compressed air can be changed during the manufacturing operation for the purpo~e of adjustment and optimization.
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. ~
: ~ : : :~
21~3902 - 13 - . .
~ 1 Head plate 30 Frame profile 2 Pressure-exerting piece 31 Bracket 3 Pressure-exerting rod 32 Rubber-metal 4 Threaded shaft vibration damper ~
Difficulties may ari~e when working with the molding apparatus -described if, as a result of the configuration of the molding, the pressure-exerting pieces of one punch group have to penetrate particularly deeply into the molding material in comparison with the rest. Penetration is made more difficult because the adjacent molding material cannot rise up without obstruc-tion, but is held back by the rest of the pressure-exerting pieces and is already pre-compacted. ~ pos-sibility for overcoming this difficulty consists in thefact that at least the lower head plate is supported with respect to the machine framework with the aid of ~pring arrangements, with the re~ult that, in the event of a molding operation, said head plate passes into its lower end position only after the rest of the head plates have come to bear thereon, exerting their bearing force thereon. The spring arrangements should at least have enough power for them to be able to bear the weight of the head plate and the punches thereof.
This results in the pressure-exerting pieces which are connected to the lowermost head plate coming to rest on the molding material only at an advanced state of the molding operation, that is to say at a point in time at which the more deeply penetrating pres~ure-exerting pieces have already passed virtually into their end position. When, for example in the case of three pres-sure-exerting plates altogether, the uppermost pressure~
exerting plate ha~ come to bear on the central pressure-exerting plate and the latter, in turn, has come to bear on the lowermost pressure-exerting plate, the ~pring arrangements are compressed, until finally all the pressure-exerting plates are located one upon the other and all the punches have reached their end positions. In the event of demolding, finally, the punches of the lower head plate~ first of all stay back when the uppermost head plate i~ raised. By virtue of the weight ef the second head plate and the punch thereof, the spring arrangements initially remain compre~ed. When the second head plate is then rai~ed, via the corresponding stops, then the third head plate follows on immediately, under the action of the spring arrangements. -~
This last-mentioned joint movement of the last punch groups too can also result in shortcomings during demolding. The aim should thus be that, during the molding operation, all the punches, from the start, assume the relative po~ition with respect to one another which, due to the desired configuration of the molding, they mu~t also assume at the end of the molding operation.
This is achieved, in accordance with a further proposal, in that the head plates are penetrated by tie rods which exhibit a stop at the lower end and, at the top, are fastened on a carrying plate, and that bellows which can be actuated by compressed air are provided in order to raise the carrying plate with re~pect to the uppermost head plate, with the result that all the head plates can be drawn together until they bear one against the other. This relative position of the pressure~
25 exerting pieces too is brought about by a corresponding -~
compressed-air control arrangement at the beginning of the lowering movement. Upon reaching the end position, air is rapidly extracted from the bellow~, with the ~;
result that the individual punch groups are then raised ~ : -from the molding in order.
It hai already been mentioned that the pressure-exerting pieces, which are suspended with their lower ends approximately in one plane after the demolding displacem~nt, can be cleaned by means of a brush roll. In this arrangement, it has occasionally turned out to be a particular advantage of the compressed-air control means that the cleaning operation may, if desired, also be carried out in an intermediate position, in the case of which, for example, the higher and more soiled ::
:' :
21~902 :: : ~ :
~ pressure-exerting pieces project downwards to a ~mall extent. This can be achieved, for example, by slow : - ;
filling of the bellows via a throttle valve.
The in~ention is described hereinbelow with reference to the drawing of preferred exemplary embodi-ments, the drawing depicting in each case a molding . :~
apparatus for producing so-called soundproofing panels as are used, for example, in soundproofing walls for fast roads. To be precise, in the drawing: ~ -Figure 1 shows a vertical partial section of a ~ :
first molding apparatus, at the end ; ~:~
stage of the molding operation, ~ :
Figure 2 shows, on a smaller scale, a view of the complete punch arrangement accor~
ding to Figure 1, Figure 3 shows a partial plan view of one of the head plate~, as is used in such punch :~
arrangements, ~ :~
Figure 4 shows a side view of a spring arrange~
ment, partially in section, for the -~
lowermost head plate, in another molding apparatus, Figure 5 shows an end view of the arrangement according to Figure 4, :
Figure 6 shows a partial view of a third molding apparatus, having a bellows which can be activated by compressed air and is --intended for drawing together the three head plates, and Figure 7 shows a plan view of the partial arrangement according to Figure 6.
For reasons of clarity, all the forms of punch are moved into one plane in Figures 1 and 2, 80 that the bore pattern according to Figure 3 does not correspond : :~;
35 thereto. " Figure 1 shows a portion of an upper head plate 1 on which a deeply penetrating, large pressure-exerting : ~;
p~ece 2 is fastened by mean~ of a pressure-exerting rod 3. The upper part of the pressure-exerting piece 2 i~
,.,., , . . , . , . , . . . . ~ - . . . . ` -2 1 ~ 3 9 0 2 ~ approximately in the form of a cube, and adjoining this towards the bottom is a four-faced wedge, the lower end surface having slightly rounded-off edges. The presRure-exerting rod 3 has, just as the others, a round cross-section and an integral threaded shaft at both ends. The lower, somewhat shorter threaded shaft 4 i8 screwed into a blind hole of the pressure-exerting piece 2 and i6 secured by means of an adheRive. In order, in this arrangement, to be able to retain the pressure-exerting rod, faces 5 are milled on two opposite sides. The upper threaded shaft 6 is plugged through a bore in the head plate 1 and fastened by means of a nut, precise angular alignment being possible.
The head plate 1 according to Figure 1, further-more, bears two downwardly projecting guide rods 7 and 8of different lengths. Said guide rods are inserted, up to their flat heads, in locating bores of the head plate 1, and stop disks 9 and 10 are screwed onto their lower end surfaces. The guide rods 7 and 8 serve for guiding a central head plate 11 and a lower head plate 12. The bore~ thereof have a degree o$ play of approximately 1 mm with respect to the guide rods. While in each case only one guide rod is shown in Figure 1, provision is actually made, ~at suitable locations, for as many guide rods as are necessary, in practice, for this purpose.
The central head plate 11 bears a pressure-exerting piece 13 which is of a sguare outline and has a smooth underside. Said pressure-exerting piece 13 is fastened, in the abovedescribed manner, on the head plate 11 by means of a somewhat shorter pressure-exerting rod 14. Furthermore, there i~ positioned, on said preesure~
exerting plate 11, a pressure frame 15 which ~hapes the peripheral border strip of the surface of the sound-proofing panel 16 to be manufactured. The pressure frame co~prises indlvidual rectilinear parts which are connected to one another by screwed-on connecting strips 17. The pressure frame has, on the under~ide, a peri-pheral triangular rib 15a which shapes the border bevel of the soundproofing panel 16. The preeeure frame 15 is ::: ~: .
21~3902 ~ ~
~ suspended on the head plate 11 via a plurality of pres-sure-exerting rods 18 which are of a smaller diameter than the rest, for which reason a collar 18a is integrally formed at the upper end of each pressure-exerting rod, in order that use can be made of the same thread as for the rest of the pressure-exerting rod~.
Finally, a pre~sure-exerting piece 19 i8 fastened on the head plate 12 via a pressure-exerting rod 20, ~aid pressure-exerting piece 19 having the same outline as the pressure-exerting piece 13, but exhibiting, on its underside, a triangular rib l9a which runs around all four borders and forms a bevel on the molding. The pressure-exerting piece 19 penetrates to the least extent into the molding composition and thus forms those parts of the molded soundproofing panel 16 which project upwards to the greatest extent, the edges of which are thus protected.
You are expressly referred to the fact that the through-passage openings in the head plates 11 and 12 for the pressure-exerting rods 3, 14, 20 permit play of 2.5 mm around said rods. The head plates 11 and 12 thus do not guide the punches. Rather, the pressure-exerting pieces 2, 13, 15 and 19 are guided, during their vertical movement, by bearing directly one on the other.
Also indicated in Figure 1 is a side wall of the molding box 21 as well as a vibrating table 22.
The relative position of the punches with respect to one another which is represented is obtained by virtue of spacer strips 23 and 24 which are each fitted on the head plato~ 11 and 12. In Figure 3, for example, the arrangement of said strips 23 is represented in plan view. In order to distribute the downwardly pressing force~ on the head plates as uniformly as possible, provision is made for a central longitudinal strip 23a, two parallel longitudinal strips 23b on both sides, and two transverse strips 23c. These are all at the same level. In the position shown in Figure 1, the spacer strip 23 bears on the head plate 1, and the spacer strip 24 bears on the head plate 11.
"~
: -:
~. . ~ ... ... ~ . . ...
2l43sa~ . ' ~:
~If the punch arrangement shown in Figure 1 is drawn upwards for demolding, then only the pres6ure-exerting pieces 2, fastened on the upper head plate 1, move initially. When, finally, this movement has pro-gressed to such an extent that the stop disk 9 of the guide rod 7 comes to bear on the head plate 11, said head plate 11 is also carried along, and thus also the pres-sure frame 15 and various pressure-exerting pieces 13. In this arrangement, account should be taken that the 10 opening in the lower head plate 12, which is penetrated ~;
by the guide rod 7 according to Figure 1, has a diameter large enough for the stop disk 9 also to pa~s through it with a large degree of play. After further movement, the stop disks 10, finally, carry the head plate 12 along with them, with the result that the pressure-exerting piece 19 is then also raised from the molding, and thus all the pressure-exerting pieces and the pressure frame -15 are in the raised state. ~ -~
This position is shown in Figure 2. The es~ential ;~
factor here is that the lower end surfaces of the pressure-exerting pieces are essentially all located in one horizontal plane and can thus be satisfactorily cleaned, for example, by means of a brush roll fitted on the filling carriage of the molding machine. -It can be seen in Figures 2 and 3 that, by means of the punch arrangement given in this example, four soundproofing panels can be molded with one displacement.
Four prossure framee 15 are provided. The molding box is correspondingly configured with two central walls ~-arranged in the form of a cross.
It can finally be seen in Figure 2 that the head plate 1 is carefully reinforced by a complex rib struc-ture. This structure, also called load, comprises a load plate 25 into which two king pins 26 are inserted. Said upwardly projecting pins with milled-out cross-slots are receivod by a quick-action clamping device which draws the load plate 25 into close contact with the ram plate of the molding machine. Reinforcing ribs 27 and 28, which run in the form of a cross and, in order to cut down on :-.. , ~ . . . , , ~
~?, `
2~43902 ~ weight, are provided in certain area~ with window cutout~
29, connect the load plate 25 to the head plate 1.
Figures 4 and 5 show a ~pring and stop arrange-ment of a further molding apparatus, of which the lower head plate 12' of likewise three head plates is repre-sented only in Figure 5. Said head plate is, with this arrangement, supported with respect to a frame profile 30 of the relevant machine frame. An angled-off bracket 31 which projects beyond the frame profile 30 i8 welded on the head plate 12'. Fastened on the frame profile 30, at this location, is a rubber-metal vibration damper 32. A
spring housing 33 is screwed beneath the bracket 31. Said housing has a contral, higher part and i8 reduced in height on both sides (Figure 4) by lower cutouts 34. The central part has three vertical bores in which three push rods 35 are mounted such that they can be displaced longitudinally. They are pushed downward~ by in each case one helical spring 36, said helical springs being BUp-ported, at the top, on the bracket 31 and, at the bottom, on a central collar of the push rod~ 35. In order that the push rods 35 are not pushed out, the bores each have, at the bottom, a shoulder against which the collar of the respective push rod butts. Inserted into the end parts of the spring housing 33 is in each case one stop screw 37, which can be adju~ted by means of a lock nut.
In the relieved position according to Figure 5, the push rods 35 are pushed out of the housing 33, with the result that the head plate 12' assu~es a higher position than in Figure 4, and the stop screws 37 are free at the bottom. When, however, during the molding operation, the upper head plate presses on the lower head plate 12' via the central head plate, then the spring arrangement yields, the push rods are di~placed into the spring housing 33 and, finally, the ~top ~crews 37 also come to bear on the rubber-metal vibration damper 32.
This is, then, tho end position, shown in Figure 4, of the head plate 12' after the molding operation.
Of the molding apparatus according to Figures 6 and 7, all three head plates 1, 11 and 12 are represented 21~39~-~
in Figure 6. Two pressure-exerting rod~ 3, which run downwards from the upper head plate 1 and are intended for the large pressure-exerting pieces 2, are indicated.
The central head plate 11 is suspended, in this demolding position, on the head plate 1 by means of the guide rods 7. In contrast to the example according to Figure 1, however, a guide rod 8, which defines the maximum spacing between the head plate 1 and the head plate 12, i~ not provided. Instead, however, provision is made for a longer tie rod 38 which also passes through the head plate 1 and, at the top, is fastened on a carrying plate 39. Said carrying plate 39, which is elongated in the manner of a rail in accordance with Figure 7, is, at the end which is shown and at the other end which is not shown, supported, via a bellows 40, on a plate 41 which is screwed on the head plate 1. For supporting at a definod level when the bellows 40 is in the relieved state, an upright flat profile 42 is welded onto the head plate 1.
The bellows 40 may be activated by compressed air via a supply line 43. In this arrangement, the bellows expand to such an extent that the carrying plato 39 is raised to the uppor position indicated by chain-dotted lines. In this arrangement, the tie rod 38 then draws up the lower head plate 12 until its spacer strip 24 butts against the central head plate 11, and then draws up the two head plate~ until the upper spacer strip 23 butts against the head plate 1. The punches are thus in the relative position shown in Figure 1, said position, in this case, having been forced already at the beginning of tho downwards displacement and being maintained until the end of tho molding operation. The pressure-exerting pieces 2 can conseguently penetrate more ea~ily into the molding material and/or the displaced molding material can yield to a better extent. When the end position is reached, air is rapidly extracted from the bellows 40, with the result that the demolding operation takes place precisely as in the case of the molding apparatus according to Figure 1, i.e. the respective punch groups ''-: .
.. ~ .. , . . - . . , .. . - . .
~ 21~390~ ~
- 12 - .
of the head plates 1, 11 and 12 are drawn upwards in order. Advantageou~ly, activation of the bellows 40 by compressed air can be changed during the manufacturing operation for the purpo~e of adjustment and optimization.
:-. . :. :-:
: ~.... ~ ~.::
.,~ "
'';-'''' ~: ~ -: .. ``- ::
. ~
: ~ : : :~
21~3902 - 13 - . .
~ 1 Head plate 30 Frame profile 2 Pressure-exerting piece 31 Bracket 3 Pressure-exerting rod 32 Rubber-metal 4 Threaded shaft vibration damper ~
5 5 Face 33 Spring housing ~ ~.
6 Threaded shaft 34 Cutout ~ -:
7 Guide rod 35 Push rod - ~ ~:
8 Guide rod 36 Helical spring 9 Stop disk 37 Stop screw 10 10 Stop disk 38 Tie rod ~;
11 Central head plate 39 Carrying plate 12 Lower head plate 40 Bellows 12' ~ower head plate 41 Plate 13 Pressure-exerting piece 42 Flat profile 15 14 Pressure-exerting rod 43 Commpressed-air Pre~sure frame supply line --~
: 15a Triangular rib 16 Soundproofing panel : 17 Connecting strip 20 18 Pres~ure-exerting rod lBa Collar 19 Pressure-exerting piece -~
l9a Triangular rib ;~
Pressure-exerting rod 25 21 Mold wall :~
22 Vibrating table 23 Spacer strip 23a Longitudinal strip 23b Longitudinal strip 30 23c Transverse ~trip - :~
24 Spacer strip : ~ :
Load plate 26 ging pin ~; 27 Reinforcing rib :
35 28 Reinforcing rib 29 ~ Window cutout :
: 15a Triangular rib 16 Soundproofing panel : 17 Connecting strip 20 18 Pres~ure-exerting rod lBa Collar 19 Pressure-exerting piece -~
l9a Triangular rib ;~
Pressure-exerting rod 25 21 Mold wall :~
22 Vibrating table 23 Spacer strip 23a Longitudinal strip 23b Longitudinal strip 30 23c Transverse ~trip - :~
24 Spacer strip : ~ :
Load plate 26 ging pin ~; 27 Reinforcing rib :
35 28 Reinforcing rib 29 ~ Window cutout :
Claims (11)
1. An apparatus for producing moldings from, in particular, concrete, the upper side of said moldings exhibiting zones which are at different levels, having a punch arrangement which is fitted into a molding box and comprises a plurality of punches which are arranged such that they can move relative to one another in the vertical direction, wherein there are provided at least three groups of punches (2, 13, 19) with different press-in levels, wherein the punches of any one group are fastened on one head plate (1, 11, 12), the punches of the head plates which are arranged at a respectively higher level passing through the head plates located therebeneath, and wherein each of the lower head plates (11, 12) is assigned guide rods (7, 8) which pass through the head plate which is assigned to them and at least the head plate which is arranged thereabove, and exhibit stops (9, 10) which limit the spacings between the head plates.
2. The apparatus as claimed in claim 1, wherein the stops (9, 10) are heads or cross-pieces which are screwed onto the end surfaces of the guide rods (7, 8).
3. The apparatus as claimed in claim 1, wherein the punches exhibit pressure-exerting pieces (2, 13, 19) which are fastened, via round pressure-exerting rods (3, 14, 20), on the head plate which is assigned to them.
4. The apparatus as claimed in claim 3, wherein the pressure-exerting pieces (2, 13, 15, 19) are at such a level, with respect to the displacement of the adjacent pressure-exerting pieces, that, in every position, they touch with their side surfaces and guide one another.
5. The apparatus as claimed in claim 1, wherein there are fastened, on the lower head plates (11, 12), spacer stripe (23, 24) which transmit the compressive and vibratory forces from the uppermost head plate (1) onto the lower head plates (11, 12).
6. The apparatus as claimed in claim 1, wherein, when the punch arrangement is suspended freely, the lower end surfaces of all the punches are located approximately in one horizontal plane.
7. The apparatus as claimed in claim 3, wherein, at both ends, the pressure-exerting rods (3, 14, 18, 20) exhibit threaded shafts of a smaller diameter.
8. The apparatus as claimed in claim 1, wherein at least the lowermost head plate (12') is supported with respect to the machine framework (30) with the aid of spring arrangements (35, 36), which bear at least the weight of the head plate (12') and the punches thereof, with the result that, in the event of a molding opera-tion, said head plate (12') passes into its lower end position only after the rest of the head plates have come to bear thereon, exerting their bearing force thereon.
9. The apparatus as claimed in claim 1, wherein the head plates (1, 11, 12) are penetrated by tie rods (38) which exhibit a stop at the lower end and, at the top, are fastened on a carrying plate (39), and wherein bellows (40) which can be actuated by compressed air are provided in order to raise the carrying plate (39) with respect to the uppermost head plate (1), with the result that all the head plates (1, 11, 12) can be drawn together until they bear one against the other.
10. The apparatus as claimed in claim 9, wherein a compressed-air control arrangement is provided, which, for the molding operation, sets the bellows (40) under pressure and, for the demolding operation, rapidly extracts air therefrom.
11. The apparatus as claimed in claim 10, wherein the compressed-air control arrangement slowly admits air to the bellows (40) again as early as during the cleaning operation of the punches, by means of brushes arranged on a filling carriage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4407127A DE4407127A1 (en) | 1994-03-04 | 1994-03-04 | Device for the production of moldings made in particular of concrete |
| DEP4407127.2 | 1994-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2143902A1 true CA2143902A1 (en) | 1995-09-05 |
Family
ID=6511793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002143902A Abandoned CA2143902A1 (en) | 1994-03-04 | 1995-03-03 | Device for producing moldings from, in particular, concrete |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5612065A (en) |
| EP (1) | EP0670206B1 (en) |
| AT (1) | ATE188412T1 (en) |
| CA (1) | CA2143902A1 (en) |
| DE (2) | DE4407127A1 (en) |
| DK (1) | DK0670206T3 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19522435A1 (en) * | 1995-06-21 | 1997-01-02 | Nuedling Franz C Basaltwerk | Blank and method and device for producing a blank |
| US6093012A (en) * | 1995-10-05 | 2000-07-25 | Rampf Formen Gmbh | Form for manufacturing concrete form components by machine |
| DE19705094C1 (en) * | 1997-01-31 | 1998-07-09 | Korsch Pressen Gmbh | Rotary press |
| CA2327867A1 (en) * | 1999-12-09 | 2001-06-09 | Robert P. Magyar | Block for supporting at least one electrical connection and a device for supporting at least one electrical connection |
| US6881094B2 (en) * | 1999-12-09 | 2005-04-19 | Power Ease, L.L.C. | Integrated electrical receptacle system for outdoor application |
| DE10034167A1 (en) * | 2000-07-13 | 2002-01-24 | Kobra Formen & Anlagenbau Gmbh | Mold for shaping concrete bricks, of different cross section shapes, has a main chamber and an ante-chamber for each molding chamber with vertical dies at each |
| DE102004005045B4 (en) * | 2003-02-19 | 2014-03-20 | Rampf Formen Gmbh | core element |
| DE102004036288A1 (en) * | 2004-06-09 | 2006-03-09 | Eudur-Bau Gmbh & Co. Kg | Apparatus for producing a multilayer concrete slab |
| US7704434B2 (en) | 2005-06-07 | 2010-04-27 | Anchor Wall Systems, Inc. | Concrete block with beveled core opening edge |
| DE102005058403B4 (en) * | 2005-12-07 | 2012-03-22 | Kobra Formen Gmbh | Device for the production of concrete blocks and mold system |
| DE102006030775B3 (en) * | 2006-06-30 | 2008-01-10 | Langenstein & Schemann Gmbh | Device for producing lime sand bricks comprises molding chambers and pressing stamps for each chamber moving in the pressing direction |
| US8794956B2 (en) * | 2011-07-27 | 2014-08-05 | Paul Adam | Mold system for forming multilevel blocks |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE139820C (en) * | ||||
| US786261A (en) * | 1904-07-19 | 1905-04-04 | Florentius Brichta | Machine for making artificial stone. |
| US839125A (en) * | 1906-01-22 | 1906-12-25 | William E Shaw | Molding-machine. |
| US981929A (en) * | 1908-04-08 | 1911-01-17 | George W Kramer | Concrete-block-making machine. |
| GB120735A (en) * | 1917-11-05 | 1919-07-10 | Valdemar Paul Hans Ingvar Obry | Improvements in and connected with Moulding Presses. |
| GB210689A (en) * | 1923-05-29 | 1924-02-07 | Roth Akt Ges Eisengiessereien | Improvements in moulding means, particularly for finely granular material |
| FR927283A (en) * | 1945-10-17 | 1947-10-24 | Hpm Dev Corp | Improvements in methods and devices for molding parts made of granular materials - such as powdered metals |
| US3115678A (en) * | 1960-10-07 | 1963-12-31 | Collins & Aikman Corp | Apparatus for molding plastic carpets |
| US3284858A (en) * | 1964-02-18 | 1966-11-15 | Molding machine and head with pressure compensating provision | |
| DK115830B (en) * | 1967-08-14 | 1969-11-10 | Modulbeton As | Extraction mechanism for core pipes in concrete molds. |
| US3534450A (en) * | 1968-05-13 | 1970-10-20 | Dansk Spaend As | Apparatus for moulding hollow concrete elements |
| US3664784A (en) * | 1970-01-19 | 1972-05-23 | Pennwalt Corp | Compacting press |
| US3764244A (en) * | 1972-05-30 | 1973-10-09 | D Hurley | Apparatus for compacting granular material |
| NL7709763A (en) * | 1977-09-05 | 1979-03-07 | Meij Antonius J Van Der | Constructional building block production system - inserts additional punches through mould walls to form thumb holes in material |
| DE8307078U1 (en) * | 1983-03-11 | 1984-03-22 | Rampf Formen GmbH, 7936 Allmendingen | DEVICE FOR PRODUCING MOLDINGS FROM CONCRETE OR THE LIKE |
| DE8714786U1 (en) * | 1987-11-06 | 1987-12-17 | Wischnowski & Hilt Gmbh & Co Kg, 5445 Kottenheim, De |
-
1994
- 1994-03-04 DE DE4407127A patent/DE4407127A1/en not_active Withdrawn
-
1995
- 1995-02-25 EP EP95102716A patent/EP0670206B1/en not_active Expired - Lifetime
- 1995-02-25 DE DE59507544T patent/DE59507544D1/en not_active Expired - Fee Related
- 1995-02-25 DK DK95102716T patent/DK0670206T3/en active
- 1995-02-25 AT AT95102716T patent/ATE188412T1/en not_active IP Right Cessation
- 1995-03-01 US US08/396,233 patent/US5612065A/en not_active Expired - Fee Related
- 1995-03-03 CA CA002143902A patent/CA2143902A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE4407127A1 (en) | 1995-09-07 |
| ATE188412T1 (en) | 2000-01-15 |
| EP0670206B1 (en) | 2000-01-05 |
| DE59507544D1 (en) | 2000-02-10 |
| EP0670206A1 (en) | 1995-09-06 |
| US5612065A (en) | 1997-03-18 |
| DK0670206T3 (en) | 2000-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |