CA2111566A1 - Mould for concrete block moulding machines - Google Patents
Mould for concrete block moulding machinesInfo
- Publication number
- CA2111566A1 CA2111566A1 CA 2111566 CA2111566A CA2111566A1 CA 2111566 A1 CA2111566 A1 CA 2111566A1 CA 2111566 CA2111566 CA 2111566 CA 2111566 A CA2111566 A CA 2111566A CA 2111566 A1 CA2111566 A1 CA 2111566A1
- Authority
- CA
- Canada
- Prior art keywords
- hose
- mold according
- groove
- chamber
- chamber wall
- 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
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0053—Machines or methods for applying the material to surfaces to form a permanent layer thereon to tiles, bricks or the like
- B28B19/0061—Means for arranging or fixing the tiles, bricks or the like in the mould
-
- 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
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0053—Machines or methods for applying the material to surfaces to form a permanent layer thereon to tiles, bricks or the like
-
- 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
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0053—Machines or methods for applying the material to surfaces to form a permanent layer thereon to tiles, bricks or the like
- B28B19/0061—Means for arranging or fixing the tiles, bricks or the like in the mould
- B28B19/0084—Means for arranging or fixing the tiles, bricks or the like in the mould using pressurized elements for fixing the tiles, bricks or the like
Abstract
Abstract:
A mold for concrete-block molding machines is proposed. It comprises a molding frame having at least one chamber which is open at the top and bottom and which is bounded by chamber walls (1, 2). So that the molded concrete body (3), insertion parts or layer elements and, after the molding operation, the insertion part, together with the concrete body or the composite body, can be raised and carried in the mold, there is installed in at least one chamber wall a clamping device which has a clamping member movable into the chamber essentially perpendicularly to the chamber wall. There can be used, in particular, as a clamping device an elastic hose (6) which is loaded by a pressure medium and which is in-serted into a groove formed on the inside of the chamber wall. The hose (6) is designed especially as a closed ring. The groove is narrowed towards the groove orifice by means of bead-like projections.
A mold for concrete-block molding machines is proposed. It comprises a molding frame having at least one chamber which is open at the top and bottom and which is bounded by chamber walls (1, 2). So that the molded concrete body (3), insertion parts or layer elements and, after the molding operation, the insertion part, together with the concrete body or the composite body, can be raised and carried in the mold, there is installed in at least one chamber wall a clamping device which has a clamping member movable into the chamber essentially perpendicularly to the chamber wall. There can be used, in particular, as a clamping device an elastic hose (6) which is loaded by a pressure medium and which is in-serted into a groove formed on the inside of the chamber wall. The hose (6) is designed especially as a closed ring. The groove is narrowed towards the groove orifice by means of bead-like projections.
Description
~`
FILE, ~ THIS f~h~lD~D`
-` ~3~ TRAN SLATION
.
"Mold for concrete-block molding machine~"
Description:
:, The invention relates to a mold for concre~e-block molding machines, with a molding frame having at least one chamber which iB open at the top and bottom and which is bounded by chamber walls.
A mold of this type i~ known from EP-A2 0,318,708. In order to carry out the molding operation, the mold is placed onto a vibrating table and filled with a relatively dry concrete mixture. A ram fitting exactly into the chamber then plunges from above into the chamber, and the load of the ram can likewiee be provided with a vibrator. After compaction, the molding~, which remain adhering in the chamber even after the removal of the vibrating table, are deposited onto a conveying means or on moldings produced in a preceding operation, after dry sand has been scattered on as a separating agent (multi-layer finisher). For this pur-pose, the molding frame moves upwards, 80 that the r~m, initially remaining in its position, pre~ses the molding out of the chamber.
However, there are also concrete moldings which, a~ a result of their high weight and as a result of reduced contact with the chamber walls, would fall out of the chamber while the mold is being raised. One 0xa~ple of this i~ curbstones which have a rounding and an oblique face which are shaped by means of a special ram (blade). The oblique face does not contribute to adhe~ion in the mold.
Other concrete bodies acquire a special design of their lower surface by means of a so-called undersleove.
By this is meant a mold part which i~ inserted into the ampty chamber and which remains on the molding after the molding operation. Only after the molding has harden~d is the undersleeve detached from it.
Finally, it i~ necessary to consider the in~tance where a layer element i~ introduced into the empty .
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?J.
FILE, ~ THIS f~h~lD~D`
-` ~3~ TRAN SLATION
.
"Mold for concrete-block molding machine~"
Description:
:, The invention relates to a mold for concre~e-block molding machines, with a molding frame having at least one chamber which iB open at the top and bottom and which is bounded by chamber walls.
A mold of this type i~ known from EP-A2 0,318,708. In order to carry out the molding operation, the mold is placed onto a vibrating table and filled with a relatively dry concrete mixture. A ram fitting exactly into the chamber then plunges from above into the chamber, and the load of the ram can likewiee be provided with a vibrator. After compaction, the molding~, which remain adhering in the chamber even after the removal of the vibrating table, are deposited onto a conveying means or on moldings produced in a preceding operation, after dry sand has been scattered on as a separating agent (multi-layer finisher). For this pur-pose, the molding frame moves upwards, 80 that the r~m, initially remaining in its position, pre~ses the molding out of the chamber.
However, there are also concrete moldings which, a~ a result of their high weight and as a result of reduced contact with the chamber walls, would fall out of the chamber while the mold is being raised. One 0xa~ple of this i~ curbstones which have a rounding and an oblique face which are shaped by means of a special ram (blade). The oblique face does not contribute to adhe~ion in the mold.
Other concrete bodies acquire a special design of their lower surface by means of a so-called undersleove.
By this is meant a mold part which i~ inserted into the ampty chamber and which remains on the molding after the molding operation. Only after the molding has harden~d is the undersleeve detached from it.
Finally, it i~ necessary to consider the in~tance where a layer element i~ introduced into the empty .
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I chamber and is to be connected permanently to the con-~ crete body to be produced, in order to form a co~posite 3 body. The connection is obtained by means of a rough or specially bonding surface of the layer element on the side facing the concrete and/or by the use of suitable bonding agents. Examples of layer elements, which, in the instance of use, lie on the top side or on the visible side of the compsite body, are ceramic or clay elements, natural-stone slabs or the like.
The object on which the invention is based is to design a mold in such a way that even heavy moldings can bo held in the mold and be raised together with the latter, and that the mold can automatically receive and retain insertion parts and layer elements before the concrete i8 introduced and, even after the molding operation, can raise and carry the insertion part, together with the concrete body or the composite body, 80 that the latter can be deposited on a base different from the production base (vibrating table).
In a mold of the type defined in the introduc-tion, this object is achieved, according to the i~en-tion, by means of the characterizing features of Claim 1.
The proposed clamping device increases the transver~e force exerted on the particular part to be retained and thereby, within a specific time interval which i8 select-able, increases the friction on the chamber wall. Thu~, concrete bodies produced in the empty chamber c~n be retained. In other cases, it is possible to slip the molding frame or the molding chambers over the part or parts to be received and then actuate the clamping device, 80 that these parts are then retained after the base has been removed from the mold.
Since molds of this type are used in production machines working automatically, it is essential that the clamping device should work automatically. It is there-fore advantageous to actuate it by means of a pressure medium, the pressure of which can be controlled.
The particular difficulty in the conctruction of the clamping device is that molds of this type are 1 ~...... . ... . .. :- :. - - ~ - ~ ~ - - --21~ 1~6~ `
subjected to extremely harsh vibrating stres~. ~oreover, the thickne6s of the chamber walls is limited. In ~rinci-ple, the clamping device can contain flat tapered slide valves which are movable by means of a working cylinder and which are themselves connected operatively to a suitably designed clamping member. The return of the clamping members into the initial position could be carried out by means of springs or likewise hydraulical-ly/pneumatically.
It is proposed, as a particularly simple and therefore preferred embodiment, that the chamber walls have on the inside a groove, into which an elastic ho~e loaded by the pressure medium is inserted. ~he groove extends preferably horizontally, that is to say parallel to the lower edge of the chamber wall. When the hoss is put under pressure, it inflates and endeavors to swell beyond the groove. At the same time, it presses onto the part to be retained. A clamping device of this type can extend from chamber corner to ch~her corner or al~o be shorter than the respective chamber wall. If the part to be retained is relatively light, a clamping de~ice on one chamber wall may already be sufficient. However, clamping arrangements can also be mounted on two opposite or on all chamber walls.
For the last-mentioned instance, it is proposed that the ho~e or a plurality of hose portions be part of a closed ring conduit which extends over the entire chamber circumference and of which the connecting conduit coming from a pressure-control device is brought through a chamber wall. It is possible to use angular pipe~ at the corners and a pipe T-piece made of metal for the connecting conduit and to connect these pipes to etraight flexible ho~e pieces. However, a ready-vulcanized annular hose can also be used. The advantage of this is that, in addition to its clamping effect, the annular hose also perform~ a sealing function and, all-round, prevents the penetration of concrete slurry into the gap between the chamber wall and the part to be retained.
Various alternatives are proposed for the ... . .. , . , . . . -............... , - ~
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;. - _ cross-section of the hose and of the groove. In order to assist the retraction of the hose in the pres~ureless state, it is expedient if the grooYe i8 narrowed toward~
groove orifices by means of bead-like projection~ of the ~ 5 groove side walls. However, the groove side walls can 3 also intentionally be kept plane, 80 that the ho~e, likewise provided with plane flanks, can slide between them. In order to achieve a high bearing force, the hose can have, between the flanks, a plane pre~ure face.
However, this can also be provided with sealing lips or flutes. In a development of thiR idea, it can be expedient to depart completely from the cros6-section of a hose with an essentially uniform wall thickness and to form onto it a rectangular gripping and sealing strip of solid cross-section. It iB proposed, furthermore, that the hose be retained at the rear, that is to say on the inside of the groove, 90 that it retracts completely into the groove a~ a result of its elasticity or by being sub~ected to a vacuum. This fixing of the hose in the groove can also be brought about by an appropriate design of the cross-section, for example by forming onto the hose at the rear a bead which snaps into a corre~pond-ingly de~igned receiving groove.
In order to protect the hose against abrasion and damage, it is proposed that a strip covering the hose be inserted as a clamping member into the groove. This strip can consist of a suitable plastic, but also of metal, and be connected to the hose by means of flat clip8 partially surrounding the hose or in another way.
Instead of a hose in the narrower sense, a wider expansion element, that is to say a cushion or a concert-ina loaded by the pressure medium, can also be provided, in which case such an expansion element could actuate a plate-like clamping member.
When layer elements consisting of a relativQly brittle, that is to say impact-sensitive, or soft materi-al are used, there is the risk that the edges of the layer element will be damaged by impact against the chamber wall during vibration. In order to counteract ~`
. ,~,. . ~.
this risk, it is proposed that a lower region of the inner face of the chamber wall which contains the clamp-ing device be set back relative to the remaining inner face, for example by a few millimeters. The height of the Ret-back region should exceed a little the height of the layer element on its outer circumference.
In order to prevent the rebound contact men-tioned, it is expedient if the chamber wall posse~ses, if appropriate in addition to the set-back of the inner face, above the clamping device a horizontally extending groove, into which is inserted an elastic impact-protec-t~on strip which is softer than the chamber wall, but nevertheless harder than the inflated clamping hose.
Preferably, the impact-protection strip, which can have a rectangular or trapezoidal cross-section, is arra~ged directly below the shoulder which forms the transition between the inner face and the ~et-back inner-face portion of the chamber wall.
Exemplary embodiments of the invention are explained below by mean~ of the drawing.
In particular, in this:
Figure 1 shows a diagrammatic representation in vertical section of a mold for a concrete curbstone, Figure 2 shows, in a corresponding repre~en-tation, a mold for a light well with a frame-like undersleeve of angular cross-section, Figure 3 shows, in a corre~ponding represen-tation, a mold for a concrete gutter with an undersleeve, Figure 4 shows, in a corresponding repre~en-tation, a mold for a gutter stone in the form of a composite body con-sisting of a gutter made of clay and of a lower concrete body, Figure 5 shows a vertical section of ~he lower part of a chamber wall and of a composite slab produeed in thi~
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chamber, in approximately natural size, Figures 6-9 ~how different versions of ho~e cro-ss-section~, likewise on an approxi-mately natural scale, Figure 10 shows a multi-sectional top view of an annular hose, such as i~ used in the molding chamber according to Figure 5, on a smaller ~cale, and Figure 11 shows a vertical section of the lower part of another chamber wall, the hose not being shown for the sake of clarity.
The diagrammatic repre~entations of Figures 1 to 4 are intended to give examples of tha use of the invention. Figure 1 show~ a box mold with two mutually opposite longitudinal walls 1 and 2, which servee for the production of a curbstone 3 made of concrete. To simplify the diagram, the rear end wall is not ~hown. A ram 4, the so-called blade, indicated by dot-and-dashed lines engag~s into the mold from above. The obligue face 5 typical of these concrete bodies i8 obtained therQby.
Without special measures, the freshly compac~ed molding would 81ip out of the mold while the latter was baing rai~ed. Consequently, there is formed on the inner faces of the chamber, in the lower region, a groove whi~h extonds all-round and which contains an elastic ho~e 6 connected to a pressure-medium source 9 via a connecting conduit 7 and a pressure-control device 8. Thi~ is shown in Figure 10. This hose is a frame-like hose having a connection piece which i8 made in one piece. When this hoso, which encircles the curbstone 3, is put under pressure, it prevents the concrete body from falling out of the mold when the latter is lifted off fro~ the vibrating table.
The mold according to Figure 2 serves for the production of a U-shaped light well 10 for ~ellar win-dows. The sectional plane extends transversely to the ~-logs. The sectional diagram shows the two outer ..
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transverse walls 11 and 12 and the two inner tran~v~r~e walls 11' and 12' which form the legs of the light ~, well 10. In order to provide a clearance at the inner edge of the light well 10 for the insertion of a grating, a U-shaped undersleeve 13 is inserted into the mold. It ha~ an L-shaped cross-~ection, the vertical leg forming the ~aid clearance. Located opposite this ~ertical leg, ln the chamber walls 11' and 12', are groove~ having inserted hoses 6' which could be connected by means of a groove and a hose piece in the longitudinal wall connect-ing these two transverse walls.
At the start of the molding operation, this mold iB lowered over the undersleeve brought up by mea~s of a conveying base and located exactly in posit~on. The hose 6 i~ then put under pressure and the undersleeve is consequently clamped in the mold. The conveying ba~e for the undersleeve can then be removed and the mold lowerad onto the vibrating table. Even after the concrete has been introduced and compacted, the mold, together with the concrete and the undersleeve, can be deposited again on another conveying base. For removal from the mold, the internal pressure of the hose 6' i8 relaxed.
In the example according to Figure 3, a molding box, similar to that of Figure 1, with longitudinal walls 1 and 2 is provided. A concrete gutter 14 i~
produced in this. For forming the shape of the gutter, there is an undersleeve 15, on the top side of which the gutter shape is formed as a positive counterpart. ~ere too, the mold initially receives the undersleeve 15 and retains it by means of the pressurized ho~e. After the concrete has been introduced and compacted, the concrete and undersleeve are deposited on any base and remov~d from the mold. After the setting of the concrete, the undersleeve 15 is detached from the finished concrete gutter 14. The number of undersleeves present in a production plant usually corresponds to a daily produc-tion of corresponding concrete moldings.
In the example according to Figure 4, a mold approximately identical to that of the preceding example ,:
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serves for producing a water gutter as a composit~ body consisting of a lower concrete part 16 and of a gutter part 17 made of clay. Here, the gutter part 17 is re-eeived by the initially empty mold in the same way as the undersleeve 15 according to Figure 3. The e~Qential difference from this preceding example i~ that, as a result of the stepped dovetail shape of its top side; the gutter part 17 bonds firmly with the eonerete body. The co~posite body thus produced has a high stability ac a recult of its lower eoncrete part 16 and, on the s~d2 at the top in the installed state, offers a gutter made of the eeramie material desired here.
Figure 5 show~ as a further example, in a repres-entation true to seale, the relevant part of a mold for the production of a composite slab whieh eonsist~ of a natural-stone slab 18 and of a eonerete layer l9o The natural-stone slab 18, on its bonding faee at the top aeeording to Figure 5, is naturally rough and, to in-ereace the bonding strength, is provided where possible with elearanees and is additionally coated with a bonding agent. Such compo~ite slab~ serve for the production of partieularly attractive large-area ground eoverings over whieh heavy vehicles can travel.
The molding chamber, in the upper region of its ehamber wall 20 in which the ram runs and eonerete is introdueed, has a clear width whieh eorresponds exaatly to the width of the natural-stone slab 18. Starting a little above the natural-stone slab 18, the molding ehamber widens via an oblique shoulder 21 and forms, with the side faces of the natural-stone slab 18, a gap 22 of a width of approximately 2.5 mm. The set-back plane surfaee portion 23 at the lower end of the ehamber wall 20 merges at the bottom into the oblique faee 24 whieh, ehould the molding frame and the natural-~tone clab not be located in exaetly eorresponding po~ition~, i~ intended to prevent them from being damaged during the lowering of the molding frame and to bring about a eorrecponding centering.
In the region of the set-baek faee portion 23, . ~
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,i the chamber wall 20 has an e sentially rectangular groove 25, the upper side wall of which is approximately at the same height as the upper face of the natural-stone slab 18. The groove 25 i8 narrowed towards the orifics, that is to say towards the natural-stone slab 18, by means of two bead-like curved projections 26 on the groove side walls. Finally, the natural-stone slab 18 has a chamfer 27 at its upper edges. The natural-stone slab 18 is thus at a distance from the chamber wall 20 on all sides, 80 that it cannot be damaged during vibration.
However, the width of the gap 22 uniform all-round is also important because the side faces of the supporting conGrete layer 19 would have to form a common plane with the ~ide faces of the natural-stone slab 18. This too is brought about by the hose 6 which can be loaded by msans of air pressure. It seals off the gap 22 all-round and presses 80 firmly onto the side faces of the natural-stone slab 18 that the latter does not slip out downwards when the molding frame is lifted out, specifically not even when concrete has already been introduaed into the molding chamber and compacted. In conclusion, during r~moval from the mold, the ho~e 6 ensures that the concrete ~lurry, which has penetrated into the receea between the shoulder 21 and the hose 6 during vibration, is pu~hed upwards and distributed 80 that the finished composite slab appears with smooth side walls. For thi~
purpose, the air pressure in the hose 6 i8 reduced to such an extent that the hose can perform this function of a wiping lip. The result of the complete cancellation of the air pressure is that the hose 6 retracts completely into the groove 25 as a consequence of the beads 26.
Figure 7 shows another hose cross-section which i~ intended for a groove with plane side walls and whick correspondingly possesses plane flanks 28 and a plane pressure face 29. Wedge-shaped sealing lip~ 30 are formed on the latter in the manner of a pressure-sensitive sucker.
The hose profile according to Figure 8 differs from the preceding one in a smaller oval cavity and in a :`
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virtually rectangular solid profile portion which can also be designated as a formed-on gripping and sealing strip 31.
Figure 9, in addition to a further hose profile, also ~hows the associated groove shape. ~ssential here is a rear T-shaped profile extension 32 which engages into a corresponding shaped-out portion of the groo~e bottom and which thus retains the otherwise round hose in the groove which widens towards the groove orifice. When the hose is put under pressure, it fills the groove and reaches beyond the latter over a relatively large width, this being indicated by dot-and-dashed lines.
Figure 11 shows the design of a further chamber wall 32 in the relevant region. The hose groove 33 shown here has a slightly different cross sectional shape from that in Figure 5. It i8 rounded on the groove bottom.
Above the hose groove 33 is provided a further rectangu-lar groove which is parallel to the latter and into which is inserted an impact-protection strip 34 made of rubber or a suitable plastic. This groove is located at the point of transition between the upper portion and the lower set-back portion of the wall inner face. The natural-stone slab 35 used here has no chamfer at the transitional edge between its top face and its side face.
The impact-protection strip 34 sarves for protecting this edge during vibration and for the additional sealing off of the gap designated by 22 in Figure 5.
, . - ` 2 ~
. 1 1 --1 Longitudinal wall 2 Longitudinal wall 3 Curbstone 4 Ram Oblique face 6 Hose 6' Hose 7 Connecting conduit 8 Pressure-control device 9 Pressure-medium source Light well 11 Transverse wall (outer) 11' Transverse wall (inner) 12 Transverse wall (outer) ~-12' Transverse wall ~inner) 13 Undersleeve 14 Concrete gutter Under61eeve 16 Lower concrete part 17 Gutter part 18 Natural-stone slab 19 Concrete layer Chamber wall 21 Shoulder 22 Gap 23 Face portion 24 Oblique face Groove 26 Projections 27 Chamfer 28 Flank 29 Pressure face Sealing lip 31 Gripping and sealing strip 32 Cha~her wall 33 Hose groove 34 Impact-protection strip Natural-stone slab ~,.,
The object on which the invention is based is to design a mold in such a way that even heavy moldings can bo held in the mold and be raised together with the latter, and that the mold can automatically receive and retain insertion parts and layer elements before the concrete i8 introduced and, even after the molding operation, can raise and carry the insertion part, together with the concrete body or the composite body, 80 that the latter can be deposited on a base different from the production base (vibrating table).
In a mold of the type defined in the introduc-tion, this object is achieved, according to the i~en-tion, by means of the characterizing features of Claim 1.
The proposed clamping device increases the transver~e force exerted on the particular part to be retained and thereby, within a specific time interval which i8 select-able, increases the friction on the chamber wall. Thu~, concrete bodies produced in the empty chamber c~n be retained. In other cases, it is possible to slip the molding frame or the molding chambers over the part or parts to be received and then actuate the clamping device, 80 that these parts are then retained after the base has been removed from the mold.
Since molds of this type are used in production machines working automatically, it is essential that the clamping device should work automatically. It is there-fore advantageous to actuate it by means of a pressure medium, the pressure of which can be controlled.
The particular difficulty in the conctruction of the clamping device is that molds of this type are 1 ~...... . ... . .. :- :. - - ~ - ~ ~ - - --21~ 1~6~ `
subjected to extremely harsh vibrating stres~. ~oreover, the thickne6s of the chamber walls is limited. In ~rinci-ple, the clamping device can contain flat tapered slide valves which are movable by means of a working cylinder and which are themselves connected operatively to a suitably designed clamping member. The return of the clamping members into the initial position could be carried out by means of springs or likewise hydraulical-ly/pneumatically.
It is proposed, as a particularly simple and therefore preferred embodiment, that the chamber walls have on the inside a groove, into which an elastic ho~e loaded by the pressure medium is inserted. ~he groove extends preferably horizontally, that is to say parallel to the lower edge of the chamber wall. When the hoss is put under pressure, it inflates and endeavors to swell beyond the groove. At the same time, it presses onto the part to be retained. A clamping device of this type can extend from chamber corner to ch~her corner or al~o be shorter than the respective chamber wall. If the part to be retained is relatively light, a clamping de~ice on one chamber wall may already be sufficient. However, clamping arrangements can also be mounted on two opposite or on all chamber walls.
For the last-mentioned instance, it is proposed that the ho~e or a plurality of hose portions be part of a closed ring conduit which extends over the entire chamber circumference and of which the connecting conduit coming from a pressure-control device is brought through a chamber wall. It is possible to use angular pipe~ at the corners and a pipe T-piece made of metal for the connecting conduit and to connect these pipes to etraight flexible ho~e pieces. However, a ready-vulcanized annular hose can also be used. The advantage of this is that, in addition to its clamping effect, the annular hose also perform~ a sealing function and, all-round, prevents the penetration of concrete slurry into the gap between the chamber wall and the part to be retained.
Various alternatives are proposed for the ... . .. , . , . . . -............... , - ~
!~
r.
' ~4 ~ S,~
;. - _ cross-section of the hose and of the groove. In order to assist the retraction of the hose in the pres~ureless state, it is expedient if the grooYe i8 narrowed toward~
groove orifices by means of bead-like projection~ of the ~ 5 groove side walls. However, the groove side walls can 3 also intentionally be kept plane, 80 that the ho~e, likewise provided with plane flanks, can slide between them. In order to achieve a high bearing force, the hose can have, between the flanks, a plane pre~ure face.
However, this can also be provided with sealing lips or flutes. In a development of thiR idea, it can be expedient to depart completely from the cros6-section of a hose with an essentially uniform wall thickness and to form onto it a rectangular gripping and sealing strip of solid cross-section. It iB proposed, furthermore, that the hose be retained at the rear, that is to say on the inside of the groove, 90 that it retracts completely into the groove a~ a result of its elasticity or by being sub~ected to a vacuum. This fixing of the hose in the groove can also be brought about by an appropriate design of the cross-section, for example by forming onto the hose at the rear a bead which snaps into a corre~pond-ingly de~igned receiving groove.
In order to protect the hose against abrasion and damage, it is proposed that a strip covering the hose be inserted as a clamping member into the groove. This strip can consist of a suitable plastic, but also of metal, and be connected to the hose by means of flat clip8 partially surrounding the hose or in another way.
Instead of a hose in the narrower sense, a wider expansion element, that is to say a cushion or a concert-ina loaded by the pressure medium, can also be provided, in which case such an expansion element could actuate a plate-like clamping member.
When layer elements consisting of a relativQly brittle, that is to say impact-sensitive, or soft materi-al are used, there is the risk that the edges of the layer element will be damaged by impact against the chamber wall during vibration. In order to counteract ~`
. ,~,. . ~.
this risk, it is proposed that a lower region of the inner face of the chamber wall which contains the clamp-ing device be set back relative to the remaining inner face, for example by a few millimeters. The height of the Ret-back region should exceed a little the height of the layer element on its outer circumference.
In order to prevent the rebound contact men-tioned, it is expedient if the chamber wall posse~ses, if appropriate in addition to the set-back of the inner face, above the clamping device a horizontally extending groove, into which is inserted an elastic impact-protec-t~on strip which is softer than the chamber wall, but nevertheless harder than the inflated clamping hose.
Preferably, the impact-protection strip, which can have a rectangular or trapezoidal cross-section, is arra~ged directly below the shoulder which forms the transition between the inner face and the ~et-back inner-face portion of the chamber wall.
Exemplary embodiments of the invention are explained below by mean~ of the drawing.
In particular, in this:
Figure 1 shows a diagrammatic representation in vertical section of a mold for a concrete curbstone, Figure 2 shows, in a corresponding repre~en-tation, a mold for a light well with a frame-like undersleeve of angular cross-section, Figure 3 shows, in a corre~ponding represen-tation, a mold for a concrete gutter with an undersleeve, Figure 4 shows, in a corresponding repre~en-tation, a mold for a gutter stone in the form of a composite body con-sisting of a gutter made of clay and of a lower concrete body, Figure 5 shows a vertical section of ~he lower part of a chamber wall and of a composite slab produeed in thi~
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chamber, in approximately natural size, Figures 6-9 ~how different versions of ho~e cro-ss-section~, likewise on an approxi-mately natural scale, Figure 10 shows a multi-sectional top view of an annular hose, such as i~ used in the molding chamber according to Figure 5, on a smaller ~cale, and Figure 11 shows a vertical section of the lower part of another chamber wall, the hose not being shown for the sake of clarity.
The diagrammatic repre~entations of Figures 1 to 4 are intended to give examples of tha use of the invention. Figure 1 show~ a box mold with two mutually opposite longitudinal walls 1 and 2, which servee for the production of a curbstone 3 made of concrete. To simplify the diagram, the rear end wall is not ~hown. A ram 4, the so-called blade, indicated by dot-and-dashed lines engag~s into the mold from above. The obligue face 5 typical of these concrete bodies i8 obtained therQby.
Without special measures, the freshly compac~ed molding would 81ip out of the mold while the latter was baing rai~ed. Consequently, there is formed on the inner faces of the chamber, in the lower region, a groove whi~h extonds all-round and which contains an elastic ho~e 6 connected to a pressure-medium source 9 via a connecting conduit 7 and a pressure-control device 8. Thi~ is shown in Figure 10. This hose is a frame-like hose having a connection piece which i8 made in one piece. When this hoso, which encircles the curbstone 3, is put under pressure, it prevents the concrete body from falling out of the mold when the latter is lifted off fro~ the vibrating table.
The mold according to Figure 2 serves for the production of a U-shaped light well 10 for ~ellar win-dows. The sectional plane extends transversely to the ~-logs. The sectional diagram shows the two outer ..
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. ,-, .. , , . ,: , . ,. .... , : ,; ~: . - . : . . .
~ -- 2 ~
transverse walls 11 and 12 and the two inner tran~v~r~e walls 11' and 12' which form the legs of the light ~, well 10. In order to provide a clearance at the inner edge of the light well 10 for the insertion of a grating, a U-shaped undersleeve 13 is inserted into the mold. It ha~ an L-shaped cross-~ection, the vertical leg forming the ~aid clearance. Located opposite this ~ertical leg, ln the chamber walls 11' and 12', are groove~ having inserted hoses 6' which could be connected by means of a groove and a hose piece in the longitudinal wall connect-ing these two transverse walls.
At the start of the molding operation, this mold iB lowered over the undersleeve brought up by mea~s of a conveying base and located exactly in posit~on. The hose 6 i~ then put under pressure and the undersleeve is consequently clamped in the mold. The conveying ba~e for the undersleeve can then be removed and the mold lowerad onto the vibrating table. Even after the concrete has been introduced and compacted, the mold, together with the concrete and the undersleeve, can be deposited again on another conveying base. For removal from the mold, the internal pressure of the hose 6' i8 relaxed.
In the example according to Figure 3, a molding box, similar to that of Figure 1, with longitudinal walls 1 and 2 is provided. A concrete gutter 14 i~
produced in this. For forming the shape of the gutter, there is an undersleeve 15, on the top side of which the gutter shape is formed as a positive counterpart. ~ere too, the mold initially receives the undersleeve 15 and retains it by means of the pressurized ho~e. After the concrete has been introduced and compacted, the concrete and undersleeve are deposited on any base and remov~d from the mold. After the setting of the concrete, the undersleeve 15 is detached from the finished concrete gutter 14. The number of undersleeves present in a production plant usually corresponds to a daily produc-tion of corresponding concrete moldings.
In the example according to Figure 4, a mold approximately identical to that of the preceding example ,:
;:. ~ . . : - - . . . - .- -- `` 2 L ~
serves for producing a water gutter as a composit~ body consisting of a lower concrete part 16 and of a gutter part 17 made of clay. Here, the gutter part 17 is re-eeived by the initially empty mold in the same way as the undersleeve 15 according to Figure 3. The e~Qential difference from this preceding example i~ that, as a result of the stepped dovetail shape of its top side; the gutter part 17 bonds firmly with the eonerete body. The co~posite body thus produced has a high stability ac a recult of its lower eoncrete part 16 and, on the s~d2 at the top in the installed state, offers a gutter made of the eeramie material desired here.
Figure 5 show~ as a further example, in a repres-entation true to seale, the relevant part of a mold for the production of a composite slab whieh eonsist~ of a natural-stone slab 18 and of a eonerete layer l9o The natural-stone slab 18, on its bonding faee at the top aeeording to Figure 5, is naturally rough and, to in-ereace the bonding strength, is provided where possible with elearanees and is additionally coated with a bonding agent. Such compo~ite slab~ serve for the production of partieularly attractive large-area ground eoverings over whieh heavy vehicles can travel.
The molding chamber, in the upper region of its ehamber wall 20 in which the ram runs and eonerete is introdueed, has a clear width whieh eorresponds exaatly to the width of the natural-stone slab 18. Starting a little above the natural-stone slab 18, the molding ehamber widens via an oblique shoulder 21 and forms, with the side faces of the natural-stone slab 18, a gap 22 of a width of approximately 2.5 mm. The set-back plane surfaee portion 23 at the lower end of the ehamber wall 20 merges at the bottom into the oblique faee 24 whieh, ehould the molding frame and the natural-~tone clab not be located in exaetly eorresponding po~ition~, i~ intended to prevent them from being damaged during the lowering of the molding frame and to bring about a eorrecponding centering.
In the region of the set-baek faee portion 23, . ~
~, 9 ~ 1 } ~ ~`
,i the chamber wall 20 has an e sentially rectangular groove 25, the upper side wall of which is approximately at the same height as the upper face of the natural-stone slab 18. The groove 25 i8 narrowed towards the orifics, that is to say towards the natural-stone slab 18, by means of two bead-like curved projections 26 on the groove side walls. Finally, the natural-stone slab 18 has a chamfer 27 at its upper edges. The natural-stone slab 18 is thus at a distance from the chamber wall 20 on all sides, 80 that it cannot be damaged during vibration.
However, the width of the gap 22 uniform all-round is also important because the side faces of the supporting conGrete layer 19 would have to form a common plane with the ~ide faces of the natural-stone slab 18. This too is brought about by the hose 6 which can be loaded by msans of air pressure. It seals off the gap 22 all-round and presses 80 firmly onto the side faces of the natural-stone slab 18 that the latter does not slip out downwards when the molding frame is lifted out, specifically not even when concrete has already been introduaed into the molding chamber and compacted. In conclusion, during r~moval from the mold, the ho~e 6 ensures that the concrete ~lurry, which has penetrated into the receea between the shoulder 21 and the hose 6 during vibration, is pu~hed upwards and distributed 80 that the finished composite slab appears with smooth side walls. For thi~
purpose, the air pressure in the hose 6 i8 reduced to such an extent that the hose can perform this function of a wiping lip. The result of the complete cancellation of the air pressure is that the hose 6 retracts completely into the groove 25 as a consequence of the beads 26.
Figure 7 shows another hose cross-section which i~ intended for a groove with plane side walls and whick correspondingly possesses plane flanks 28 and a plane pressure face 29. Wedge-shaped sealing lip~ 30 are formed on the latter in the manner of a pressure-sensitive sucker.
The hose profile according to Figure 8 differs from the preceding one in a smaller oval cavity and in a :`
: .
:::
-- lQ _ 2~
virtually rectangular solid profile portion which can also be designated as a formed-on gripping and sealing strip 31.
Figure 9, in addition to a further hose profile, also ~hows the associated groove shape. ~ssential here is a rear T-shaped profile extension 32 which engages into a corresponding shaped-out portion of the groo~e bottom and which thus retains the otherwise round hose in the groove which widens towards the groove orifice. When the hose is put under pressure, it fills the groove and reaches beyond the latter over a relatively large width, this being indicated by dot-and-dashed lines.
Figure 11 shows the design of a further chamber wall 32 in the relevant region. The hose groove 33 shown here has a slightly different cross sectional shape from that in Figure 5. It i8 rounded on the groove bottom.
Above the hose groove 33 is provided a further rectangu-lar groove which is parallel to the latter and into which is inserted an impact-protection strip 34 made of rubber or a suitable plastic. This groove is located at the point of transition between the upper portion and the lower set-back portion of the wall inner face. The natural-stone slab 35 used here has no chamfer at the transitional edge between its top face and its side face.
The impact-protection strip 34 sarves for protecting this edge during vibration and for the additional sealing off of the gap designated by 22 in Figure 5.
, . - ` 2 ~
. 1 1 --1 Longitudinal wall 2 Longitudinal wall 3 Curbstone 4 Ram Oblique face 6 Hose 6' Hose 7 Connecting conduit 8 Pressure-control device 9 Pressure-medium source Light well 11 Transverse wall (outer) 11' Transverse wall (inner) 12 Transverse wall (outer) ~-12' Transverse wall ~inner) 13 Undersleeve 14 Concrete gutter Under61eeve 16 Lower concrete part 17 Gutter part 18 Natural-stone slab 19 Concrete layer Chamber wall 21 Shoulder 22 Gap 23 Face portion 24 Oblique face Groove 26 Projections 27 Chamfer 28 Flank 29 Pressure face Sealing lip 31 Gripping and sealing strip 32 Cha~her wall 33 Hose groove 34 Impact-protection strip Natural-stone slab ~,.,
Claims (16)
1. Mold for concrete-block molding machines, with a molding frame having at least one chamber which is open at the top and bottom and which is bounded by chamber walls (1, 2; 11, 12, 11', 12'; 20; 32), characterized in that there is installed in at least one chamber wall (1, 2; 11, 12, 11', 12'; 20; 32) a clamping device which has a clamping member (6; 6'; 31) movable into the chamber essentially perpendicularly to the chamber wall.
2. Mold according to Claim 1, characterized in that the clamping device is actuable by means of a pressure medium, the pressure of which can be controlled (8).
3. Mold according to Claim 2, characterized in that the clamping device contains tapered slide valves which can be moved by means of a working cylinder and which are themselves connected operatively to the clamping member.
4. Mold according to Claim 2, characterized in that the chamber walls (1, 2; 11, 12, 11', 12', 20; 32) have on the inside a groove (25; 33), into which an elastic hose (6; 6') loaded by the pressure medium is inserted.
5. Mold according to Claim 4, characterized in that the hose (6, 6') or a plurality of hose portions is or are part of a closed ring conduit (Figure 10), the connecting conduit (7) of which is brought through a chamber wall.
6. Mold according to Claim 4, characterized in that the groove (25) is narrowed towards the groove orifice by means of bead-like projections (26) of the groove side walls.
7. Mold according to Claim 4, characterized in that the hose has plane flanks (28) which can be laid against plane groove side-face portions.
8. Mold according to Claim 7, characterized in that the hose has a plane pressure face (29) extending between the flanks (28).
9. Mold according to Claim 4, characterized in that the hose has a pressure face (29) provided with sealing lips (30) or flutes.
10. Mold according to Claim 4, characterized in that a cross sectionally rectangular gripping and sealing strip (31) is formed onto the hose.
11. Mold according to Claim 4, characterized in that the hose is retained (32) at the rear, so that it re-tracts into the groove as a result of its elasticity or by being subjected to a vacuum.
12. Mold according to Claim 4, characterized in that a strip covering the hose is inserted as a clamping member into the groove.
13. Mold according to Claim 2, characterized in that the chamber wall has on the inside a shallow clearance, in which a cushion or a concertina loaded by the pressure medium is arranged.
14. Mold according to Claim 1, characterized in that a lower region (23) of the inner face of the chamber wall (20; 32) which contains the clamping device (6) is set back relative to the remaining inner face.
15. Mold according to Claim 1, characterized in that, above the clamping device, the chamber wall (32) has a horizontally extending groove, into which an elastic impact-protection strip (34) is inserted.
16. Mold according to Claim 15, characterized in that the impact-protection strip (34) is arranged directly below the shoulder which forms the transition between the inner face and the set-back inner-face portion of the chamber wall (32).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4212702.5 | 1992-04-16 | ||
| DE19924212702 DE4212702A1 (en) | 1992-04-16 | 1992-04-16 | Method and device for producing stone composite panels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2111566A1 true CA2111566A1 (en) | 1993-10-28 |
Family
ID=6456922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2111566 Abandoned CA2111566A1 (en) | 1992-04-16 | 1993-04-07 | Mould for concrete block moulding machines |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0590121A1 (en) |
| CA (1) | CA2111566A1 (en) |
| DE (1) | DE4212702A1 (en) |
| WO (1) | WO1993020991A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19534592C2 (en) * | 1995-09-11 | 2000-10-19 | Baudg Baumarketing Dev Gmbh | Device and method for producing combined paving stones, slabs and the like. Components that, in their position of use, each consist of an upper facing plate and are connected to a lower concrete base layer |
| DE29611484U1 (en) * | 1996-07-02 | 1996-09-05 | Rampf Formen Gmbh | Molding box with several molding chambers for the mechanical production of concrete moldings |
| DE19628396A1 (en) * | 1996-07-13 | 1998-01-15 | Kobra Formen & Anlagenbau Gmbh | Mold for the production of molded parts |
| IT1310672B1 (en) * | 1999-08-05 | 2002-02-19 | Record Spa | SELF-LOCKING FLOORING ELEMENT AND ITS PRODUCTION PROCEDURE. |
| DE10017715A1 (en) * | 2000-04-11 | 2001-10-18 | Sf Koop Gmbh Beton Konzepte | Manufacturing shaped blocks for sets of ground coverings involves applying compensating coating to base body or top with dimensions selected so block has exact desired dimensions |
| DE10164542B4 (en) * | 2001-12-31 | 2009-08-27 | Kobra Formen Gmbh | Arrangement for the production of concrete moldings |
| DE10232760A1 (en) * | 2002-07-18 | 2004-04-22 | Harald Winkler | Process for producing a composite stone and vibrating machine for use in the process |
| US9186813B2 (en) * | 2010-12-01 | 2015-11-17 | Erik Garfinkel | Automated concrete structural member fabrication system, apparatus and method |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE803757C (en) * | 1949-04-24 | 1951-04-09 | Hermann Josef Boeyng | Method and device for the production of bound stones and molded parts |
| DE862422C (en) * | 1951-11-13 | 1953-01-12 | Schlosser & Co | Device in block molding machines with hydraulic or pneumatic drive for temporarily holding the load in its working position |
| FR1143554A (en) * | 1954-03-11 | 1957-10-02 | Procedes Tech Soc D Expl Des | Siding machine |
| US3467354A (en) * | 1966-04-05 | 1969-09-16 | Phillip Graham | Flexible forms for building construction |
| FR2263088A1 (en) * | 1974-03-04 | 1975-10-03 | Laporte Jean Claude | Machine for producing clay pigeons for shooting - has cavities holding pigeons until released by vert. push rods |
| DE2839704A1 (en) * | 1978-09-13 | 1980-03-27 | Dettmer Wilhelm Kg | Prefabricated concrete block with decorative surface - has natural or artificial stones laid on resilient surface and set into concrete poured over them from behind |
| CH649736A5 (en) * | 1980-11-24 | 1985-06-14 | Steiner Silidur Ag | METHOD OF MAKING SELF-SUPPORTING PLATES, PLATE MANUFACTURED BY THE PROCESS AND USING THE SAME. |
| DE8307078U1 (en) * | 1983-03-11 | 1984-03-22 | Rampf Formen GmbH, 7936 Allmendingen | DEVICE FOR PRODUCING MOLDINGS FROM CONCRETE OR THE LIKE |
| DE3602537C2 (en) * | 1986-01-29 | 1995-03-23 | Ibach Steinkonservierungen | Method for producing multilayer, plate-shaped prefabricated components |
| IT1213945B (en) * | 1987-12-02 | 1990-01-05 | Micron Welding S P A | METHOD AND MACHINE WITH PLATE FOR THE PRODUCTION OF VARIOUS SHAPED BLOCKS IN COMPRESSED AND VIBRATED CONCRETE |
| DE8807309U1 (en) * | 1988-06-06 | 1988-10-20 | Ingenieurbuero Prust, Ulrich Prust, 4803 Steinhagen, De |
-
1992
- 1992-04-16 DE DE19924212702 patent/DE4212702A1/en not_active Withdrawn
-
1993
- 1993-04-07 EP EP93907799A patent/EP0590121A1/en not_active Withdrawn
- 1993-04-07 CA CA 2111566 patent/CA2111566A1/en not_active Abandoned
- 1993-04-07 WO PCT/DE1993/000334 patent/WO1993020991A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0590121A1 (en) | 1994-04-06 |
| WO1993020991A1 (en) | 1993-10-28 |
| DE4212702A1 (en) | 1993-10-21 |
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