DE2166661A1 - Box for gas concrete blocks prodn - has liftable frame , with walls engaged by U-shaped plates - Google Patents

Abstract

Box for prodn. of gas concrete blocks with reinforcement for building bricks, has a releasable frame surrounding the floor. The frame can be lifted from the floor and pulled along the side faces of the mass of gas concrete in the box. Preferably the frame is a unit, and may have separable long and cross walls; U-shaped plates engage over the walls, and spring-loaded bolts engage them, to engage the cross wall with the end faces of the long wall. The blocks can be easily sepd. after presetting. The surfaces are smooth and free from disturbing depressions.

Description

Ref .: P 21 66 661 5 Stuttgart, October 14, 1974

Annu: Gottfried and Paul Rössle P 2226 AX / kg 7141 Steinheim
Uhlandstrasse 12

Device for the production of pore or Gaabeton blocks

The invention relates to a box-shaped device for producing aerated concrete blocks or aerated concrete blocks, f in particular with reinforcement, with a base and a frame that surrounds the base and is detachable from it.

In the industrial production of aerated concrete blocks or aerated concrete blocks, a casting mold is used Cuboid cavity forms, foamable aerated concrete mass introduced. After applying and pre-hardening

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216666 J.

the cuboid shape content into individual cuboids or Cut up plates. The cuboids or plates can then be used to manufacture small building blocks can be further subdivided. The cutting is preferably carried out immediately after the pre-hardening. It will For this purpose, tightly tensioned wires are pulled through the concrete block, whereby it is divided. These Division is made when the aerated concrete has set so far that the individual Do not connect the panels to each other firmly. The pre-hardening is followed by a further hardening, generally in an autoclave using pressurized steam.

It is known to use tensioned wires to separate the contents of the mold into individual plates or blocks (German patent application I 1 368/80 A). The wires are held parallel to each other on a frame, which after folding down the mold side walls is moved along the gas or aerated concrete block that it is cut into individual plates. Preferably lie the wires are horizontal and the cutting planes traversed by the wires are also horizontal and parallel to the plane of the bottom of the device. It is also known to perform cutting with vertical wires, However, the bottom of the device must be divided lengthways accordingly so that each wire finds a joint, through which he can walk. Because these joints during

tois
When pouring the mas3e / must be tightly sealed for pre-hardening, such a floor is expensive to manufacture and prone to failure during operation.

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It is also known to use reinforcement cages with a vertical center plane in the manufacture of reinforced aerated concrete slabs hang in the mold and then fill in the casting compound and foam it up. After pre-hardening the entire shape is tilted by 90 ° around a horizontal axis and then the will now be vertical standing floor and the upper wall adjacent to the floor folded back again, freeing the aerated concrete block stands on the lower side wall of the mold, which now serves as the bottom. It is now, as previously described, with horizontal wires between the reinforcement cages the aerated concrete block is severed (CH-PS 326 098). This ver | driving requires a considerable amount of lifting equipment In addition, the surface of the aerated concrete block tears when the floor and the floor connected to it are pivoted away Side wall slightly off, dg. the stress in this form of demoulding perpendicular to the surface of the aerated concrete block runs and often smaller nests of aerated concrete stick to the mold surface, which then stick to the Aerated concrete blocks are missing and leave unwanted indentations there.

The object of the present invention is to provide a device for producing gas or aerated concrete blocks create, in which a comfortable separation of the aerated concrete block is possible after pre-hardening and which can be attached to the Shape adjacent surfaces of the aerated concrete block are smooth and without disturbing depressions.

This object is achieved according to the invention in that the frame can be lifted upwards from the ground and along the side surfaces of the aerated concrete mass located in the device is removable.

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In contrast to devices with hinged side walls or devices in which the content, including the form, is first tilted until it stands on one side wall and then the bottom and other side walls are swiveled away, the aerated concrete surface cannot be torn out with an upwardly removable frame come because the peeling takes place in the plane of the surfaces and there is no stress perpendicular to the surface plane. In this case, the frame unit can preferably be pulled off upwards. This makes it possible to already re-assemble the frame with a different floor and to use as a casting mold, W as long as the first floor with the iOrmihhalt from which the frame has been removed, the subsequent operations of cutting or curing undergoes. The number of frames required is therefore significantly less than the number of shelves required, which saves investment costs adjoining three side walls _{or the like}

The frame can be rigidly connected. & In preferred embodiments, however, the Frame made of separable longitudinal and transverse walls and the transverse walls can be lifted perpendicular to their plane. This embodiment of the device has the advantage that the material to be molded on the adjacent transverse walls Surfaces is already demolded before the mold is lifted off. It is avoided that when you lift the frame because of the strong adhesion in the corners

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Corners are damaged or, for example, if the frame is slightly tilted, the molded product in the Frame catches. The transverse walls and the side walls can butt against each other. With a preferred Embodiment of the Invention However, the Transverse walls than the U-shaped cross walls Plates formed on which spring preloaded bolts attack that the transverse wall to the plant bring them to the end faces of the side walls. To lift the transverse walls from the end faces of the side walls you can For example, forcing screws or eccentric levers can be used. In a preferred embodiment of the In accordance with the invention, the transverse walls can be lifted off the molded product by wedges engaging the bolts. This embodiment is particularly useful because the wedges with vertical extension can be arranged in such a way that they are of the lifting equipment that is used to lift the Frame from the base plate, are movable «

In a particularly preferred embodiment of the invention the frame is divided into sections about as wide as a panel is thick, and they are those ^ rush apart in the vertical direction so that they Form gaps for the passage of cutting wires "This" embodiment has the advantage that a partial pulling off of the frame is sufficient to open openings for the cutting wires to create to separate the aerated concrete block. It is also advantageous that the gas concrete block in particular is supported on the side on which the wires emerge after being cut and thus the risk of that the pre-hardened aerated concrete breaks out at the exit points of the wires, is reduced.

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It could happen if the frame tilts when it is pulled off, unless only individual walls are pulled off, that the frame takes the aerated concrete block and lifts off the bottom of the mold. To rule this out and an even and to ensure gentle removal * of the side walls, a counter-pressure plate is provided in particularly preferred embodiments of the invention, which rests on the surface of the aerated concrete mass; there are two walls that are parallel to one another when the one is supported Counter-pressure plate can be pulled off upwards in its plane and there are the two remaining walls together with the counter-pressure plate removable upwards. In general, the surface of the gabsteon block is uneven due to the foaming become. Before the counterpressure plate is placed on top, if this is not the case when it is still liquid, however, it is at least already largely foamed aerated concrete is placed and thereby excess aerated concrete mass is pushed aside, initially the surface is cut off smoothly according to the edge of the mold or parallel to the plane of the edge of the mold and then the counter pressure plate is placed. The particular advantage of this embodiment of the invention lies initially once in the fact that the removal of the walls in their plane results in a very gentle demolding of the not yet hardened Permitted aerated concrete mass. Since two walls that are adjacent to one another and that form a corner are never removed at the same time are also avoided that the stress in the corners during the pulling process is too high, which leads to Tearing and damaging the corners could result. The simultaneous raising of the counter pressure plate and the the two other walls results in a very simple construction, since the one required for the counter-pressure plate in any case Lifting mechanism used to pull off two walls with. The animal walls are preferred

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pulled off together with the counter pressure plate. At first there is no connection between the counter pressure plate and the walls moved up with her. To establish this connection, for example on the walls in the path of the counterpressure plate pivotable and fixable stops be provided In a preferred embodiment of the invention the counterpressure plate is provided with movable holders and the ones that can be removed with the counterpressure plate Walls equipped with mounts for these holders. For example, these holders can take the form of thorns have, which can be inserted into holes or recesses in the walls. The insertion can thereby done by hand or it can be the Dorna by means of attached to the counter pressure plate pneumatic or Hydraulic cylinder are pushed in.

Further details and embodiments of the present invention emerge from the following description Embodiments shown in the drawing in connection with the claims. It show ^

1 shows a box-shaped device for manufacturing

of reinforced aerated concrete blocks in particular in g

a schematic side view, the

Fig. 2 and 3 details of the device in enlarged Scale in plan view or side view,

4- a cross-section through a further embodiment on an enlarged scale and

5 shows a section along the line VII-VII of FIG. 5098 U / 00.0 1

The box-shaped device shown in Fig. 1 for the simultaneous ^ creating a "plurality of aerated concrete blocks has a rectangular plan and comprises a floor 4 and this floor all around surrounding frame 5, which encloses the rectangular plan ο Two of the opposing walls of the frame 5 have holes 8 through which, perpendicular to these walls, rods are guided, which are displaceable in the longitudinal direction of the bores 8. These poles serve to hold reinforcement mats. Before the aerated concrete mass is introduced into the form, the bottom through the holes 8 inserted rods a welded wire mesh is placed as reinforcement. Then the The next group of bars above it was pushed in and the next mat was placed on top, and so on, the floor is designed as a fixed plate that cannot be dismantled during operation, is mobile and runs on rails.

The frame 5 can be lifted off the floor 4. “At the beginning of the manufacturing process, a frame 5 is placed on an empty floor 4. Then, as described above, rods are alternately inserted and reinforcement mats are inserted. Or the reinforcement mats are held at a predetermined distance and introduced and then the W rods are pushed in. Then liquid aerated concrete mass is poured in and foamed.This process is followed by pre-hardening, which generally lasts a few hours and in which the aerated concrete mass solidifies to such an extent that it is already dimensionally stable and can be cut open without the cut surfaces after cutting connect firmly together again. When this hardening state is reached, the frame 5

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removed in that it, as a unit or broken down into individual walls, is withdrawn upwards. (It understands that previously the rods introduced through the holes 8 are pulled out of the aerated concrete mass). Means Tightly stretched horizontal wires turn the aerated concrete block into the desired cuboid, in this case Plates, cut open. Any overburden that may arise during foaming is also cut off. Afterward the cut up aerated concrete blocks are driven into an autoclave and there under increased temperature cured by the introduction of pressurized steam. f

The frame 5 comprises two longitudinal walls for each partial cavity 11, which are designed as flat plates with stiffening ribs 12 protruding outward. At the front a transverse wall 13 rests against the longitudinal wall 11. Transverse wall 13 has drawn-in edge strips at its ends 14, which rest on the outside of the longitudinal wall 11. The transverse wall 13 has some transverse reinforcement profiles 15 which protrude laterally beyond the edge strips 14. On these stiffening profiles are bolts 16 with the plane of the transverse wall 13

attached vertical axis. The bolts extend through the stiffening ribs 12 g of the longitudinal wall 11 therethrough. At their free end, the bolts 16 are provided with a washer 17 on which a compression spring 18 is supported, the other end of which rests against an adjacent stiffening rib 12 and exerts a force on the bolt that pushes the transverse wall 13 on the front side of the longitudinal wall 11 holds in the plant. On the side of the stiffening rib 12 facing away from the compression spring 18, a transverse pin 19 is attached to the bolt. Between the cross pin 19 and the adjacent stiffening rib 12 is a double

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Wedge 20 is provided, one for each transverse pin 19 Bolt 16 has a wedge surface 21. If the double wedge 20 is parallel to that by the intersection of the planes of the Walls 11 and 13 moves defined direction, it is about the. Cross pin 19 of the relevant bolt 16 against the Action of the compression spring 18 moves in the direction in which the transverse wall 13 from the longitudinal wall 11 and from the molded product free

When in the Pig. 4- and 5 illustrated embodiment of the invention, the walls of the form are tightened in their plane upwards when the aerated concrete mass is sufficiently hardened. The frame here comprises two longitudinal walls 41 »for each partial cavity flat plates with outwardly protruding stiffening ribs 42 are formed. On the front side lies a transverse wall 33 on the longitudinal wall 41. The longitudinal wall 41 is provided with an angled profile 34 on its end face provided, which forms a groove 35 into which the transverse wall 33 can be inserted. The intermediate piece points in the same way 6 a profile strip 36 which forms grooves together with the end faces of the intermediate piece 6, in which the transverse wall 33 is inserted. A separate transverse wall 33 is provided for each partial cavity. Before the shaping, that is, before the side walls 41 are pulled off upwards, a counter-pressure plate 37 lowered onto the surface of the aerated concrete mats, the by means of a mechanical, pneumatic or hydraulic Hebeeeugta 38 is vertically movable. the The base area of the counter-pressure plate 37 corresponds approximately to the clear dimensions between the longitudinal walls 41 and the transverse walls 33 · In devices with an intermediate piece 6, the counter-pressure plate 37 is doubtlessly impossible.

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educated. Pneumatic cylinders 39, through which a bolt can be moved perpendicular to the transverse walls 33, are attached to the top of the counter-pressure plate. The transverse walls 33 are provided with bores 43. If compressed air is supplied to the pneumatic cylinder 39, the bolts are moved forward and penetrate into the bore 43, which has a larger diameter than the bolt 40. Before or after the introduction of the bolts 40 into the bores 43, another lifting device, not shown, is used , the two longitudinal walls 4-1 withdrawn upwards. The counter-pressure plate 37 rests on the aerated concrete mass. The counter-pressure plate 37 is then moved upwards by means of the hoist 38 and the transverse walls 33 are also moved upwards at the same time.

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Claims (8)

Ref .: F 21 66 661.5 Stuttgart, October 14, 1974 Note: Gottfried and Paul Rössle P 2226 A X / kg patent claims 1. Box-shaped device for producing ^v aerated concrete blocks and in particular reinforced aerated concrete building blocks with a bottom and a ground around surrounding releasable by him frame, characterized in that the frame (5) upwards from the floor (4) can be lifted off and along the side surfaces the aerated concrete mass located in the device can be deducted. 2. Device according to claim 1, characterized in that the frame (5) as a unit of the bottom (4) is removable upwards. 3. Device according to claim 1 or 2, with a frame made of separable longitudinal walls and transverse walls, characterized in that the transverse walls (13) are U-shaped plates which overlap the longitudinal walls (11) are formed, on which spring-loaded bolts (16) attack that the transverse wall (13) to rest on the front sides of the longitudinal wall dl), 4. Apparatus according to claim 3 »characterized in that that the transverse wall (13) can be lifted off the molded product by wedges (20) engaging the bolt (16). 5 · Device according to claim 1 or 3 or 4, characterized characterized in that the frame (5) is divided into sections 5098U / 0001 / 3 is divided, which are about as wide as a plate is thick, and that the parts in the height direction can be pulled apart so that they column to Forming cutting wires through. 6. Device according to one of the preceding claims, characterized in that a counter-pressure plate is provided which rests on the surface of the aerated concrete mass, that two walls parallel to one another can be pulled off in their plane when the counter-pressure plate rests, and that the two remaining μ walls together can be pulled off upwards with the counterpressure plate. 7. Apparatus according to claim 6, characterized in that the transverse walls together with the counter pressure plate are removable. 8. Apparatus according to claim 6 or 7 »characterized in that that the counter pressure plate with movable holders and the removable one with the counter pressure plate Walls are provided with receptacles for these holders. 509814/0001