Process for producing double slabs, and a device suitable for realizing said process

Description

[0001] This invention concerns a process for producing double slabs and also concerns a device suitable for realizing said process.

[0002] To be more exact, this invention concerns a process suitable for obtaining double slabs by making use advantageously of flat trellises able to support and position reciprocally and temporarily the electrically welded wire mesh which is thereafter contained and embedded in the castings which constitute the two plane-parallel slabs forming the double slabs.

[0003] Double slabs are known which are typically composed of an element with a continuous or semi-continuous surface cooperating with another substantially similar element, both ele- . ments consisting advantageously of cemented conglomerate, whereby metallic elements having stiffening and distancing characteristics are interposed between the two slabs.

[0004] Double slabs are also known with which insulating and/or soundproof elements cooperate.

[0005] This invention concerns a new process to obtain said double slabs and also concerns a new device suitable for realizing said process.

[0006] In the known art there is, for instance, patent application IT 19741 A/77 in the name of Sartorio, wherein the equipment and processes for making and applying a building element are described.

[0007] Said building elements are made in an automatic equipment working in a continuous cycle. Said automatic equipment comprises a movable working surface consisting of an endless mat of plastic material moved by suitable rollers.

[0008] Parallel rings of a suitable section are also envisaged for delimiting the side zones of formation of said building element.

[0009] This device involves many drawbacks in that its continuous movement makes it impossible to vary, as desired, the structure of the panels thus made, and moreover it is not suited to the diverse operations which have to be carried out to make said building element.

[0010] Furthermore, if working is carried out in a discontinuous cycle, a plurality of interferences begins to take place among the various operations or functions performed on the same working surface.

[0011] Moreover, the patent does not say how the working surface is limited in its lengthwise direction, nor does it indicate any other functional elements required.

[0012] Patent application IT 23223 A/77, also in the name of Sartorio, describes some presumed improvements to the preceding patent.

[0013] This patent application shows a new method to obtain double slabs; this method envisages the lowering from above of both the wire mesh and the distance and separating elements into a mass of cemented conglomerate that is not yet solidified.

[0014] This device too requires a very liquefied concrete mass with very long drying and hardening times and involves many drawbacks and shortcomings which make it difficult to apply.

[0015] There is also patent application IT 25325 A/77, again in the name of Sartorio, wherein substantially a system is disclosed for a bond between neighbouring panels with a double slab; a special panel is also envisaged which repeats substantially an old patent of Sartorio, namely IT 713.072.

[0016] Moreover, a further patent in the name of Sartorio has been set forth wherein the realization of double slabs is envisaged by means of a system of crosswise supports cooperating with soundproof elements.

[0017] According to a process described in IT 27620 A/ 78, the elements cooperating with the distancing trellises comprise special conformations which cannot be readily handled on a building site.

[0018] An application also exists in the name of lm- pianti Industriali, which was submitted under No. 83345 A/78 and deals with a system for realizing double slabs by withdrawal from above of the mould forming the empty spaces.

[0019] This patent deals with a particularly advantageous device which, however, has inborn limitations because of the height of the shed which it assumes to be available.

[0020] Our present invention aims at the realization of double slab panels with a device which is relatively simple and at the development of a process which can also be carried out by making use of the normal existing tables for making slabs.

[0021] This invention, therefore, enables double slabs to be made even in cooperation with and on tables already suitable for producing single slabs:

[0022] According to the invention arrangements are made to lay on a suitable table an electrically welded wire mesh and to apply the flat trellises, after which it is arranged to pour the concrete mass and create a homogeneous slab by vibration, this phase being substantially the same as that normally employed for flat slabs.

[0023] On this layer a mould with comb elements is applied, the upper surface of which forms the lower inner surface of the upper slab constituting the double slab, whereby the mould is suitable for not interfering lengthwise with the intermediate trellises.

[0024] The upper surface of the mould with the comb elements is positioned on suitable distancing shims, which thereby regulate the thickness of the double slab; said distancing shims cooperate with appropriate supports not connected to the vibrating surface on which the first slab has been produced.

[0025] On the mould with the comb elements an intermediate layer of insulating and/or soundproof material can be spread or deposited.

[0026] This intermediate layer can consist of a plurality of elements made of soundproof and/or insulating material, on which an electrically welded wire mesh is advantageously laid and anchored to the flat vertical protruding trellis elements.

[0027] When the electrically welded wire mesh has been disposed, arrangements are made to cast the concrete and vibrate the upper slab; the vibration takes place independently of that of the lower slab since the mould with comb elements receives its vibration either from independent supports or directly and discharges said vibration onto independent supports.

[0028] When vibration has taken place or earlier, the surface of the upper slab is finished with a levelling board, which may perhaps vibrate, the purpose being to obtain diverse finishes for the usage phase of the slab.

[0029] Next, steps are taken to anchor the mould with comb elements to a crane and to hoist it in a substantially horizontal position, thereby also lifting the double slab in which the mould with comb elements is lodged

[0030] The double slab, with the mould with comb elements lodged inside it, is rested on an appropriate table.

[0031] During this phase the mould with comb elements detaches itself independently, owing to the force of its own weight, from the upper slab and rests on the lower slab, thus being ready to be withdrawn.

[0032] When one end of the mould with comb ele- ^- ments has been removed, it is possible to apply to the other end a suitable towing means, which may be a winch.

[0033] By means of this towing means steps are then taken to withdraw the mould with comb elements from the double slab on a substantially horizontal surface.

[0034] According to an embodiment of the invention the weight of the mould during withdrawal is advantageously borne not by the slab but on appropriate rollers positioned on the table itself and on a possible plurality of bearings solidly fixed to the mould with comb elements and running on appropriate guides.

[0035] The double slab thus formed can be left on the withdrawal table for final hardening or can be rested on suitable surfaces; the double slab is normally transported with a bridge crane or lift truck.

[0036] According to a variant of the invention the mould with comb elements is suitable for the circulation of a hot substance able to speed up the drying and hardening process.

[0037] According to another variant said hot substance will advantageously be hot air and/or steam and perhaps will be allowed to flow between the mould and the double slab so as to improve the drying and hardening action.

[0038] The device suitable for carrying out this process, therefore, is envisaged as having a moulding surface with vibration means, whereby said surface and said means can be the same as those required now to make a single slab.

[0039] The use of a lifting means and of auxiliary means to position the mould with comb elements is also envisaged. Independent supporting and/or vibrating means cooperating with the mould with comb elements are also envisaged.

[0040] In cooperation with the forming table a withdrawal table is envisaged as having substantially horizontal towing means, the mould means being advantageously guided and supported thereon.

[0041] Hence, according to one aspect the invention is embodied by a process for manufacturing double slabs, which are advantageously suitable for building purposes and consist of at least two substantially plane-parallel slabs of cemented conglomerate in which electrically welded wire mesh elements are embedded; said plane-parallel slabs are kept apart from each other by trellis elements advantageously consisting of a flat trellis; said process is characterized by the fact that an electrically welded wire mesh cooperating with the advantageously flat trellises is put in a known manner on a forming surface; thereafter conglomerate is cast in a known manner and is vibrated, and then, after suitable distance means have been placed, a mould with comb-like cross-section is disposed, on which a layer of insulating and/or soundproof material is optionally laid and on which is placed an electrically welded wire mesh anchored to the protruding trellises; next, a mass of cemented conglomerate is cast and vibrated independently of the vibration of the lower slab, thus producing the upper slab; the whole arrangement is then lifted and moved onto a substantially horizontal withdrawal surface, where the mould with the comb elements is withdrawn axially.

[0042] Furthermore, the invention is embodied by a device for producing double slabs, which are advantageously suitable for building purposes and consist of two substantially plane-parallel slabs of cemented conglomerate in which electrically welded wire mesh elements are embedded, said plane-parallel slabs being kept apart from each other by trellis elements advantageously consisting of a flat trellis comprising table means and vibrating means to form the first slab, said device being characterized by further comprising in mutual cooperation and coordination:

- mould means with a comb-like cross-section having circumferential means to retain the conglomerate, and at least one removable end bar for positioning and handling purposes;

- independent height adjustable means to support the mould means with comb-like cross-section, also having vibrating means;

- substantially horizontal surface means with means to sustain and possibly to guide the comb-like mould means;

- and means to withdraw those mould means.

[0043] By means of the attached drawings, which give an illustrative but not restrictive example, a preferential embodiment of the invention is described in the following:

Fig. 1 shows from above a plant with two forming tables and two withdrawal tables;

Fig. 2 gives a side view of the plant of Fig. 1;

Fig. 3 gives a three-dimensional view of the forming table with the mould with combs in the process of being positioned;

Fig. 4 shows the plant with the mould with combs in position and the electrically welded wire mesh fitted;

Fig. 5 shows the plant of Fig. 4 with the second slab being cast;

Fig. 6 shows a successive phase of levelling and vibrating the second layer;

Fig. 7 shows the mould/double slab assembly being removed with a winch;

Fig. 8 shows a double slab positioned on the supporting table, while the mould with combs is already connected to the winch and has been partially withdrawn;

Fig. 9 shows the mould with combs fully withdrawn from the double slab;

Fig. 10 gives an example of the combs of the mould means.

[0044] According to the example shown in the figures the forming table 14 is supported by one or more beams 16 resting on independent legs 117, which in this instance are anchored to the floor.

[0045] The forming table 14 has in a position beneath itself some vibrators 15 which cooperate with the table 14.

[0046] On its upper side the forming table 14 has the ability to anchor some suitable movable and shaped side boards 29, which can be fixed by locking pins 28 or other means.

[0047] These movable side boards 29 serve to conform the edge of the lower slab 30 and at the same time to contain the cast concrete.

[0048] In cooperation with the forming table 14 and at the sides thereof there are supports 33 which are independent of the forming table 14 and which cooperate with legs 17 and have vibrating elements 115.

[0049] The independent supports with bearing surface 33 comprise an alignment pin 19 and possibly variable shims 32 for the vertical positioning of a mould 20 with comb elements 120. Instead of the variable shims 32 other means to adjust height could be employed.

[0050] A vibrator 115 which is suitable for transmitting the vibration desired to the mould means 20 with comb elements 120 and only to said mould means 20 cooperates with the supporting surface 33.

[0051] Between the supporting surface 33 and the legs 17 vibration-damping means 31 may be envisaged which do not let the vibrations of the vibrator 15 pass on.

[0052] The forming of the double slab takes place substantially as follows: the forming table 14 is prepared beforehand, and on it the movable side boards 29 are positioned and secured by suitable pins 28 so as to limit circumferentially in a desired manner the slab 30 to be obtained.

[0053] Within the perimeter formed by these side boards 29 is laid an electrically welded wire mesh 42, to which are anchored, in our example, by means of hooks 27 some trellises 26 for connecting and distancing purposes.

[0054] Said trellises 26 are advantageously flat and are characterized by suitable hooks 27 which enable a trellis to be anchored to the electrically welded wire mesh 42 by a simple sideways displacement of the trellis 26 in respect of the wire mesh 42.

[0055] Other trellises 26, however, can be employed which are substantially suitable for use but have no hooks 27.

[0056] Within the perimeter formed by the movable side boards 29 the conglomerate, which may be a cemented conglomerate, is then poured until the thickness desired for the lower slab 30 has been reached. Next, the whole is vibrated by the vibrators 15 cooperating with the forming table 14.

[0057] When the first layer or first slab 30 has been obtained, steps are taken to position the mould means 20 with comb elements 120 by making use of a crane 24 with slings 23 cooperating with appropriate hook holes 22 in the frontal connection bars 18.

[0058] The frontal bars 18 position between themselves the comb elements 120 of the mould means 20 and are anchored to the mould by connecting pins 34 able to be inserted wherever needed.

[0059] The frontal bars 18 comprise at their ends at 21 some appropriate holes able to cooperate with the positioning means or pins 19 present on the supporting surface 33.

[0060] Thus, the mould 20 with comb elements rests on separate and auxiliary structures 17; 33 which do not cooperate directly with the forming table 14.

[0061] This makes it possible to use already existing forming tables 14 too and merely to add legs 17 and supporting surfaces 33 like those shown.

[0062] The frontal bars 18 include at their end some guide bearing means 118 which are suitable, during the withdrawal phase, for cooperating with a lateral guide 137 of the withdrawal group 13.

[0063] The frontal bars 18 secure the comb elements 120 of the mould means 20.

[0064] The comb elements 120 and frontal bars 18 are fixed to each other, for instance, by pins 34, so that by removing the pins 34 it is possible to remove the frontal bars 18.

[0065] Arrangements are then made to position the mould means 20 in such a way that the combs 120 are disposed alongside the trellises 26 so that the corresponding slits 25 cooperate with the trellises 26.

[0066] The slits 25 are closed on their upper side advantageously by elastic means 125 which prevent the conglomerate from passing through and enable a moulding surface 114 to be obtained.

[0067] The comb elements 120 can be formed in any desired manner.

[0068] When positioning the frontal bars 18, care should be taken to ensure that the holes 21 in said frontal bars 18 coincide with the positioning means or pins 19 so as to permit both a suitable anchorage and a coordinated seat on the surface 33.

[0069] With the mould means 20 in position the plant is ready to make the second layer.

[0070] To regulate the interspace which has to be kept between the upper and lower slabs, steps are taken to dispose shims 32 of various sizes until the required height is reached. Instead of the shim means 32 of another type to regulate the height can be envisaged.

[0071] A layer of insulating and/or soundproof material is placed on the forming surface of mould means 20, or nothing is placed thereon, depending on the specific requirements.

[0072] Electrical and/or hydraulic circuits can also be disposed together with possible junction boxes or sockets, thus enabling the various electrical, hydraulic and intercom circuits, etc. to be obtained or making it possible to obtain spaces which are equipped or can be equipped, such as for windows or doors and the like while the double slab is being made.

[0073] The electrically welded wire mesh 42 is put on the mould 20 with the comb elements 120 and possibly on the layer of insulating material, and is anchored to the trellises 26.

[0074] When the electrically welded wire mesh has been anchored to the trellises 26, the plant is ready to make the second slab 43.

[0075] As said earlier, the trellises 26 are made to pass through the mould means 20 by making use of lengthwise slits 25, which are closed to the passage of concrete material by the means 125 made of an elastic material.

[0076] Around the mould means 20 and on its upper side, suitable movable side boards 129 are provided and fixed to the mould means and to the bars 18 and serve to delimit the second slab 43.

[0077] When the upper surface 114 of mould 20 has been prepared, steps are taken to pour (at 38) and level the conglomerate 39, as shown in Figs. 4, 5 and 6 for example.

[0078] Levelling can be done by a levelling board 41, which may be motorized or not and which can cooperate with vibrator means 215.

[0079] As soon as the upper surface 40 has been levelled and the product has hardened enough, arrangements are made to lift with the crane 24 the whole assembly consisting of the double slab 30-43 and the mould means 20 with comb elements 120, as shown in Fig. 7 as an example.

[0080] The mould means 20 can be provided with suitable ducts through which steam or hot air or another heating means can pass so as to dry and normalise the double slabs more quickly.

[0081] According to a variant the comb elements 120 include a plurality of holes 220 which permit the coordinated passages of steam and/or hot air which comes into contact with the conglomerate and speeds up drying.

[0082] Said holes 220 can be of any desired type and shape and can be located anywhere.

[0083] The double slab 30, 43 and mould means 20 are lifted together and the whole is rested on a withdrawal table 12, care being taken that the rear end bar 18 cooperating with the rear end of the mould means 20 cooperates advantageously with pins 119 on the withdrawal table 12.

[0084] When the double slab 30, 43 and the mould means 20 are rested on the withdrawal table 12, the mould means 20 detaches itself from the upper slab 43 owing to the action of its own weight and rests on the lower slab 30, thus freeing itself.

[0085] On the withdrawal table 12 the double slab can be rested advantageously on the supports 112 covered with wood or with an elastic material.

[0086] Next, the end bar 18 present at the front of the mould means 20 is anchored to winch means 35 on a carriage or carriages by a towing wire 36.

[0087] The rear end bar 18 cooperating with the pins 119 is then detached by removing the connections consisting of the connection pins 34, if existent; the mould means 20 is thus left with only the front end bar 18.

[0088] By using the winch 35, the mould means 20 is pulled out from the double slab and is advantageously made to slide on supporting rollers 37 so that said mould means 20 does not press on the lower slab 30 and thereby create stresses or breakage.

[0089] To reduce the pressure still further, the bearing means 118 of the bar 18 slide on the lateral guides 137 and are sustained thereby.

[0090] When the whole mould means 20 has been withdrawn, the slab is available for transfer to any desired place.

[0091] Ledge means 234 can be envisaged which are able to permit the mould means 20 to continue to be supported both by the bearing means 118 (at its front) and by the roller or rollers 37 (at its rear).

[0092] As soon as it has been withdrawn, the mould means 20 is cleaned and re-assembled, and the end bar 18 which was temporarily detached is mounted again thereon; the mould means 20 is used again for the next cycle of moulding double slabs, said cycle beginning with the time of use of the mould means 20 itself.

[0093] In fact, the forming table 14 has been cleaned in the meanwhile, the electrically welded wire mesh 42 has been disposed, the trellises 26 have been disposed, the first casting of conglomerate has been carried out and vibrating has been done.

[0094] This makes available the immediate installment of the mould means 20 which has been withdrawn from the double slab 30, 43.

[0095] A plant 10 according to the invention can include one or more stations 11 with forming tables 14, perhaps aligned, and one or more withdrawal groups 12,13 with one or more winch means 35, depending on the production rate.

[0096] We have described here a preferential solution of the invention, but variants are possible.

[0097] Thus the proportions, times, sizes and lay-outs can be varied; it is possible to conform the mould means 20 in any desired way; the invention can be combined with forming tables 14 already existing, etc. These and other variants are all possible for a technician in this field.

Claims

1. Process for producing double slabs which are advantageoulsy suitable for building uses and consist of two substantially plane-parallel slabs (30-43) of cemented conglomerate in which electrically welded wire mesh (42) elements are embedded, said parallel slabs being separated from each other by trellis elements (26) which are preferably flat trellises, said process being characterized by the fact that on a forming surface (14) an electrically welded wire mesh (42) cooperating with trellises (26), which are advantageously flat, is placed in a known manner and that a casting of conglomerate is then carried out in a known manner and is next vibrated to obtain the lower slab (30), and that, after regulation of the desired height by suitable distance means (32), a mould means (20) with a comb-like cross-section is disposed on separate support means (33) onto which, optionally after interposition of a layer of insulating and/or soundproof material, an electrically welded wire mesh (42) is placed and anchored to said trellises (26) protruding through slits (25) between the projecting elements (120) of the comb-like mould means (20), and that a mass of cemented conglomerate is then poured which is vibrated independently of the vibration of the lower slab (30), the second slab (43) being thus obtained, whereafter the double slab together with the comb-like mould (20) is lifted and moved onto a substantially horizontal withdrawal surface (12), where said comb-like mould means (20) is withdrawn axially.

2. Device for producing double slabs which are advantageously suitable for building uses and consist of two substantially plane-parallel slabs (30, 43) of cemented conglomerate in which electrically welded wire mesh elements are embedded, said parallel slabs being separated from each other by trellis elements (26) which are preferably flat trellises, the device being suitable for carrying out the process of Claim 1, said device comprising a table means (14) to form the lower slab (30), equipped with vibrating means (15), and being characterized by further comprising in mutual cooperation and coordination:

- mould means (20) with a comb-like cross-section together with means to retain the conglomerate (125,129) and with at least one end bar (18) to obtain positioning and handling purposes,

- supporting means (33) for the comb-like mould means (20) with positioning means (19) and height adjustable means (32), said supporting means (33) being independent of the supporting means (117) of the table (14) and having independently acting vibrating means (115),

- withdrawal table means (12) with substantially horizontal withdrawal means (13) together with means (112, 37, 137) to support and preferably to guide the comb-like mould means (20).

3. Device according to Claim 2, characterized by the factthat the supporting means (33) are upheld by independent legs (17) and that there are vibration-damping means (31) between legs (17) and the supporting means (33).

4. Device according to Claims 2 or 3, characterized by the fact that a plurality of interspaced comb elements (120) are positioned by end bar means (18), at least one of said end bar means (18) being removable, and that the slits (25) between said comb elements (120) include elastic means (125) to retain conglomerate at least at their upper side.

5. Device according to Claim 4, characterized by the fact that the end bar means (18) include holes (21) to cooperate with the positioning means (19) and guide bearing means (118) cooperating with guide means (137), and that there are advantageously hook means (22) and means to anchor side boards (129).

6. Device according to any one of Claims 2 to 5, characterized by the fact that the comb elements (120) include means to receive and convey hot substances (air and/or steam), and that there are distribution means (220) for those substances.

7. Device according to any one of Claims 2 to 6, characterized by the fact that the withdrawal table means (12) with withdrawal means comprises supporting surfaces (112) for the double slab (30, 43)/mould means (20) assemblage and, at their front side, towing means (35, 36) and guiding (137) and supporting means (37) and possibly a stop (234).

8. Device according to Claim 7, characterized by the fact that the supporting surfaces (112) are covered with soft-materials (wood, rubber, etc.).

9. Device according to Claims 7 or 8, characterized by the fact that the towing means (35, 36) consist of winch means (35) cooperating with a cable (36) anchored to the end bar (18) solidly fixed to the plurality of comb elements (120).

Revendications

1. Procédé pour produire des dalles doubles qui sont avantageusement appropriées pour les utilisations dans le bâtiment et sont composées de deux dalles sensiblement planes et parallèles (30-43) faites d'un conglomérat cimenté et dans lesquelles sont noyés des éléments en grillage de fil métallique soudé électriquement (42), lesdites dalles parallèles étant espacées l'une de l'autre par des éléments en treillis (26) qui sont de préférence des treillis plats, ledit procédé étant caractérisé par le fait qu'on dispose d'une façon connue sur une surface de moulage (14) un grillage en fil métallique soudé électriquement (42) qui coopère avec des treillis (26) qui sont avantageusement plats, et qu'on effectue ensuite la coulée du conglomérat d'une façon connue et qu'on vibre ensuite ce conglomérat pour obtenir la dalle inférieure (30), qu'après le réglage de la hauteur désirée à l'aide de moyens de maintien à distance appropriés (32), on dispose des moyens (20) formant moule à section en forme de peigne sur des moyens supports séparés (33) sur lesquels, après avoir éventuellement déposé une couche de matière isolante et/ou insonorisante, on place un grillage en fil métallique soudé électriquement (42), qu'on fixe audits treillis (26) qui font saillie à travers des fentes (25) comprises entre les éléments saillants (120) desdits moyens (20) formant moule en forme de peigne, et qu'on coule ensuite une masse de conglomérat cimenté qui est vibrée indépendamment de la vibration de la dalle inférieure (30), la deuxième dalle (43) étant ainsi obtenue, après quoi on soulève la double dalle, avec le moule (20) en forme de peigne, et on la place sur une surface d'extraction (12) sensiblement horizontale, où lesdits moyens (20) formant moule en forme de peigne sont extraits axialement.

2. Dispositif pour produire des dalles doubles qui sont avantageusement appropriées pour être utilisées dans le bâtiment et sont composées de deux dalles (30, 43) sensiblement planes et parallèles, faites d'un conglomérat cimenté, dans lesquelles sont noyés des éléments en grillage de fil métallique soudé électriquement, lesdites dalles parallèles étant espacées l'une de l'autre par des éléments de treillis (26) qui sont de préférence des treillis plats, le dispositif étant approprié pour la mise en oeuvre du procédé selon la revendication 1, ledit dispositif comprenant des moyens (14) formant table destinés à mouler la dalle inférieure (30), équipés de moyens de vibration (15) et ce dispositif étant caractérisé en ce qu'il comprend en outre, dans des relations de coopération et de coordination mutuelles: des moyens (20) formant moule à section en forme de peigne, combinés à des moyens (125, 129) destinés à retenir le conglomérat et à au moins une barre d'extrémité (18) destinée à des fonctions de positionnement et de manutention; des moyens supports (33) prévus pour les moyens (20) formant moule en forme de peigne, équipés de moyens de positionnement (19) et de moyens (32) réglables en hauteur, lesdits moyens supports (33) étant indépendants des moyens supports (117) de la table (14) et étant munis de moyens de vibration (115) qui agissent indépendamment; des moyens (8) formant une table d'extraction munis de moyens d'extraction sensiblement horizontaux (13) équipés de moyens (112, 37, 137) destinés à supporter et, de préférence, à guider, les moyens (20) formant moule en forme de peigne.

3. Dispositif selon la revendication 2, caractérisé par le fait que les moyens supports (33) sont maintenus en position haute par des pieds indépendants (17) et qu'il est prévu des moyens d'amortissement des vibrations (31) entre les pieds (17) et les moyens supports (33).

4. Dispositif selon la revendication 2 ou la revendication 3, caractérisé par le fait qu'une pluralité d'éléments de peigne (120) espacés les uns des autres sont positionnés par des moyens (18) formant barres d'extrémités, au moins l'un desdits moyens (18) formant barres d'extrémités étant amovible, et par le fait que les fentes (25) situées entre lesdits éléments de peigne (120) comprennent des moyens élastiques (125) destinés à retenir le conglomérat au moins sur leur face supérieure.

5. Dispositif selon la revendication 4, caractérisé par le fait que les moyens (18) formant barres d'extrémités comprennent des trous (21) destinés à coopérer avec les moyens de positionnement (19) et à guider les moyens de portée (118) qui coopèrent avec des moyens de guidage (137) et par le fait qu'il est avantageusement prévu des moyens du type crochet (22) et des moyens servant à fixer des planches latérales (129).

6. Dispositif selon l'une quelconque des revendications 2 à 5, caractérisé par le fait que les éléments de peigne (120) comprennent des moyens destinés à recevoir et transporter des substances chaudes (de l'air et/ou de la vapeur) et qu'il est prévu des moyens de distribution (220) pour ces substances.

7. Dispositif selon l'une quelconque des revendications 2 à 6, caractérisé par le fait que les moyens (12) formant table d'extraction, équipés de moyens d'extraction, comprennent des surfaces supports (112) pour l'assemblage composé de la dalle double (30, 43) et des moyens (20) formant moule et, le long de leur côté avant, des moyens de traction (35, 36) et des moyens de guidage (137) et de support (37) et éventuellement un arrêt (234).

8. Dispositif selon la revendication 7, caractérisé par le fait que les surfaces supports (112) sont revêtues de matière tendre (bois, caoutchouc, etc....).

9. Dispositif selon la revendication 7 ou la revendication 8, caractérisé par le fait que les moyens de traction (35, 36) sont constitués par des moyens (35) du type treuil, coopérant avec un câble (36) fixé à la barre d'extrémité (18), elle-même solidement fixée à la pluralité d'éléments de peigne (120).

Ansprüche

1. Verfahren zum Herstellen von doppelschaligen Platten, vorteilhaft für Bauzwecke, bestehend aus zwei im Wesentlichen parallelen Platten (30, 43) aus gebundenem Konglomerat, in welchem elektrisch verschweißte Drahtgitter (42) eingebettet sind, wobei die parallelen Platten durch vorzugsweise flache Gitterwerke (26) distanziert sind, dadurch gekennzeichnet, daß zur Herstellung der unteren Platte (30) in bekannter Weise auf einer Formfläche (14) ein elektrisch verschweißtes, mit vorzugsweise flachen Gitterwerken (26) zusammenwirkendes Drahtgitter (42) aufgelegt, Konglomerat aufgegossen und in Vibration versetzt wird, ferner daß nach Einstellung der gewünschten Höhe durch Distanzorgane (32) eine Form (20) mit einem kammartigen Querschnitt auf getrennte Tragorgane (33) aufgesetzt wird, auf welche, fakultativ nach Zwischenlage einer Schicht aus isolierendem und/oder schalldämmendem Material, ein elektrisch verschweißtes Drahtgitter (42) gelegt und mit den durch Schlitze (25) zwischen den vorstehenden Elementen (120) der kammartigen Form (20) herausragenden Gitterwerken (26) verbunden wird, daß ferner eine Masse gebundenen Konglomerats aufgegossen und unabhängig von der Vibration der unteren Platte (30) in Vibration versetzt wird, sodaß die zweite Platte (43) erhalten wird, worauf die doppelschalige Platte zusammen mit der kammartigen Form (20) gehoben und zu einer im Wesentlichen horizontalen Auszugsfläche (12) bewegt wird, wo die kammartige Form (20) achsial ausgezogen wird;

2. Vorrichtung zum Herstellen von doppelschaligen Platten, vorteilhaft für Bauzwecke, bestehend aus zwei im Wesentlichen parallelen Platten (30, 43) aus gebundenem Konglomerat, in weichem elektrisch verschweißte Drahtgitter (42) eingebettet sind, wobei die parallelen Platten durch vorzugsweise flache Gitterwerke (26) distanziert sind und die zur Ausführung des Verfahrens nach Anspruch 1 dienende Vorrichtung einen mit Vibrationsorganen (15) ausgestatteten Tisch (14) für die Formung der unteren Platte (30) aufweist, gekennzeichnet durch: eine Form (20) mit einem kammartigen Querschnitt und mit Mitteln zum Zurückhalten des Konglomerats (125, 129) und mit mindestens einem Endbalken (18) zum Zweck der Positionierung und Handhabung, Tragorgane (33) für die kammartige Form (20) mit Positioniermitteln (19) und Organen (32) zur Einstellung der Höhe, wobei diese Tragorgane (33) unabhängig von den Tragorganen (117) des Tisches (14) sind und unabhängig arbeitende Vibratoren (115) aufweisen, einen Auszugtisch (12) mit im Wesentlichen horizontalen Auszugsmitteln (13) zusammen mit Mitteln (112, 37, 137) zum Tragen und vorzugsweise zum Führen der kammartigen Form (20).

3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Tragorgane (33) durch unabhängige Füße (17) abgestützt sind und daß vibrationsdämpfende Mittel (31) zwischen den Füßen (17) und den Tragorganen (33) angeordnet sind.

4. Vorrichtung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß eine Mehrzahl von im Abstand voneinander liegenden Kammelementen (120) mittels Endträgern (18) positioniert sind und daß mindestens einer dieser Endträger (18) abnehmbar ist, und daß die Schlitze (25) zwischen den Kammelementen (120) elastische Mittel (125) zum Zurückhalten von Konglomerat an mindestens ihrer oberen Seite aufweisen.

5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Endträger (18) Öffnungen (21) zur Zusammenarbeit mit den Positioniermitteln (19) und Führungsträgermittel (118) zur Zusammenarbeit mit Führungsmitteln (137) aufweisen, und daß vorzugsweise Haken (22) und Mittelzur Verankerung von Seitenbalken (129) vorgesehen sind.

6. Vorrichtung nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die Kammelemente (120) Mittel zur Aufnahme und Förderung heißer Substanzen (Luft und/oder Dampf) besitzen und daß Verteilermittel (220) für diese Substanzen vorgesehen sind.

7. Vorrichtung nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß der Auszugtisch (12) mit den Auszugmitteln Tragflächen (112) für die aus doppelschaliger Platte (30, 43) und Form (20) bestehende Gesamtheit aufweist und daß an der Vorderseite des Auszugtisches Zugmittel (35, 36), Führungsmittel (137) und Tragmittel (37) sowie eventuell ein Anschlag (234) vorgesehen sind.

8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Tragflächen (112) mit weichen Materialien (Holz, Gummi etc.) bedeckt sind.

9. Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß die Zugmittel (35, 36) aus einer Winde bestehen, die mit einem Seil zusammenwirkt, das an dem mit einer Mehrzahl von Kammelementen (120) fest befestigten Endträger (18) fest verankert ist.

Drawing