DE102007030324A1 - Cement tile mold, with a press, has a collection system at the base for extracted water and removal of extracted water from the press - Google Patents

Abstract

The mold for the production of cement tiles has a closed base (1) and a press (2) with a water extraction system, with at least one water collection (19,21,22A,22B). The system collects the water squeezed out of the cement during the press action. The collection system is linked to a system (14A,14B) to take water from the press water extraction (7) under fluid pressure.

Description

object The present invention is an apparatus for manufacturing of tiles, preferably single-layer tiles, according to the preamble of claim 1.

One significant problem with known devices for the production of single-layer tiles affects the discharge of water away from the mold, due to the pressing process in the manufacture the tiles exit from the cement paste.

There are devices are known in which in a so-called presser means are provided, by means of which the water of the mass is sucked through a vacuum, when this mass is pressed, and in which this water passed through the presser to a lying outside the Andrückers container becomes. Devices of the type described above are disclosed, for example, in the patent applications and patents EP 1 296 295 . GB 21 28 129 . US 4,335,065 . DE 33 11 965 . GB 458,709 . EP 0 629 477 described.

The known devices of the type as indicated above, have numerous disadvantages. Suction under pressure by means of of a vacuum claims the pressed mass and can at the tile Cracks and deformations cause what often leads to their sorting. One Another disadvantage in connection with the suction of the water Cement material under pressure is related to the fact that during the Extraction process not only the water contained in the mass against the filter elements contained in the press head is pressed, but also numerous Contaminants, such as cement contained in the water, fine dust and color pigments, thus resulting in rapid blockage of the Filter elements leads. In the known devices, these filter elements must therefore exchanged regularly and / or cleaned, causing a slowdown in the overall Production cycle of the press leads.

It It is an object of the present invention to provide an apparatus for the production of single-layer tiles to provide, with the help which overcome the above-mentioned disadvantages and in particular a system for the discharge of the press water is created by that does not damage the tiles and that will be a longer one Operating time guaranteed by the filter head provided in the press head.

These and other tasks for A person skilled in the art will be aware of a device according to the characterizing one Part of the main claim resolved.

To the better understanding The present invention will now be described purely by way of non-limiting example an embodiment the invention described with reference to the following drawings.

1 schematically shows a cross-sectional view of the device according to the invention.

2 and 3 show schematically cross-sectional views during two different phases of work.

4 schematically shows the magnification of in 3 A section marked A.

5 schematically shows a cross-sectional view of a component of the presser of the device along the line 5-5 6 ,

6 schematically shows a cross-sectional view along the line 6-6 5 ,

7 schematically shows a side view according to arrow C from 5 ,

8th shows an enlargement of the arrow B from 6 marked section.

9 schematically shows the bottom view of a section of the presser of the device.

10 schematically shows a cross-sectional view along the line 10-10 9 ,

With reference to said figures, a device according to the invention has at least one closed bottom mold 1 and at least one presser 2 on top of a conventional movement mechanism for a specialist 3 (partly in 1 shown), which is suitable, a pressing head 4 of the presser 2 at least partially into the interior of the mold 1 ( 3 ) to move to the cement paste 5 to compress inside the mold and then to remove the head from the mold again. The presser 2 includes drainage facilities 6 . 7 to at least partially dissipate the water emerging from the cement paste during the pressing process.

Specifically, the form includes closed bottom 1 the conventional construction a rubber floor 8th working in a conventional way on a vehicle surface 9 rests and is fixed, with the shape on the sides by a conventional with a support or frame 11 connected locking frame 10 is closed, and wherein the bottom and the locking frame comprises individual, separable elements. Form 1 is ge suitable, the cement paste 5 , as in 2 shown to be absorbed and dense. The presser 2 is with an upper Andrückerträgerplatte 12 connected, which is releasable with a movement mechanism 3 and a first spacer 13 is connected, which in turn releasably connected to a second spacer 14 The interior is connected by several vertical and horizontal channels 14A . 14B which are suitable, the underlying compression head 4 with a pressurized fluid (fluid) to supply. The different parts of the presser are, for example, with each other and with the upper Andrückerträgerplatte 12 by means of threaded holes guided by screws 25A -C connected. The pressing head 4 comprises the following, releasably interconnected, superimposed elements: a third spacer 17 , a first fixed filter element 15 and second absorbent flexible filter elements, together denoted by 16.

The third spacer 17 contains in its middle part four vertical channels 18 ( 5 and 1 ), which are capable of a tight connection with the corresponding vertically extending channels 14A the overlying spacer 14 to build. The element 17 has four downwardly open chambers on its underside 19 that with the channels 18 are connected. In the embodiment shown in the figures, the shape of the spacer is 17 as well as the entire presser substantially square, and the chambers 19 are arranged in an X-shape along the diagonals ( 5 ).

The chambers 19 are downwards with several channels open at the top 22A , B, whose openings into the upper surface of the solid filter element 15 are admitted. The spacer 17 also has on all its long sides ( 7 ) over a plurality of horizontally extending channels 20 with a circumferential channel 22C the solid filter element 15 turn, in turn, with the other channels 22R and 22B of the element 15 connected is.

The solid filter element 15 has a large number of vertical channels along its entire surface 21 , which are at a uniform distance from each other and above each other and with the chambers 19 over the upwardly open vertical, horizontal and circumferential channels 22A . 22B and 22C are connected ( 5 ).

Advantageously, the outer edge of the filter element is at an angle P (FIG. 10 ) of, for example, about 15 ° to the vertical. This first filter element 15 is in a mount 23 housed, the detachable - for example, about screws 24 ( 1 ) and threaded holes 24A - with the spacer 17 which in turn is connected to the screws 25A . 25B and 25C detachable with the other spacers and plates 14 . 13 and 12 connected is. The inner edge 23A of the mount 23 has a similar inclination as the outer edge of the filter element 15 ,

At the level of the bottom of the mount 23 there is a recessed recording for a shift 26 which preferably consists of vulcanised rubber or polyurethane which is suitable for facilitating the detachment of the pressing head from the cement paste after the pressing operation. The dimensions of the mount 23 are such that their outer side wall - as usual for a person skilled - when entering the mold almost the corresponding inner wall 10A ( 4 ) of the locking frame 10 touched the shape and makes with this a certain tightness.

It should be emphasized that it is desirable in the press according to the invention that the enclosure 23 of the pusher and the locking frame 10 the shape does not close completely tight, but on the contrary, a lateral leakage of the pressing fluid or the pressing liquid is possible through the provided for this purpose external suction 7 is sucked off. In the known presses, however, a perfect tightness between the skirt of the squeegee and the corresponding locking frame is required because otherwise the emerging from the mold press liquid (or generally a fluid) pollute the workplace due to the lack of discharge of the fluid (fluid) very quickly and so complicate the work and make it difficult to make the tiles.

The second filtering and absorbing element 16 has one or more layers 27 . 28 consisting of two different flexible materials, wherein the outer filter layer has a higher filtering effect than the inner layer. This outer filter layer 27 is that which comes in contact with the cement paste and is suitable to prevent the passage of solid particles from the mass during the pressing process upwards and at the same time to allow the flow of the liquid portion upwards.

For example, the filter layer contains 27 a polypropylene fabric having a warp density of 50 to 80 threads per centimeter, preferably 65, and a weft density of 15 to 35 threads per centimeter, preferably 23. The product sold by the Italian company Testori SpA under the number P 6124 QC is, for example around a tissue with these properties.

For example, the outer filter layer 27 so that they become a part 27A ( 8th ) over the lateral, outer surface of the overlying solid filter element 15 can be beaten and in this way quickly and easily, as explained in more detail below, the flexible filter layers 27 . 28 with the pressing head 4 combines.

The other flexible layer 28 has, as already mentioned, a lower filtering effect than the outer layer and thus has a lower warp and weft density than the layer 27 , The layer 28 preferably consists of a polypropylene fabric with a warp density of, for example, 7 to 13 threads per centimeter, preferably 10.5, and a weft density of 3 to 7 threads per centimeter, preferably 5.

at from the Italian company Testori S.p.A. under the For example, number P 1107 GQ distributed product around a tissue with these properties.

Advantageously, also has the inner filter layer 28 about a part 28A ( 8th ), which over the lateral, outer surface of the overlying solid filter element 15 can be beaten, the part 28A preferably has a smaller dimension than the corresponding part of the outer layer 27 ,

According to the invention, the two layers include 27 . 28 a material that absorbs and holds the press water well, so that not only do they have a filtering function, but they are also able to hold the water like an "oversized diaper".

For this purpose, the layers could 27 . 28 one or more layers with the said absorbent properties are added and / or a layer of a conventional membrane, which is suitable to pass the press water only in one direction, ie only from bottom to top, and store it until it is removed ,

According to the invention, the filter layers 27 . 28 Connected to the press head as follows: When the press head is disassembled, ie when its components 17 . 15 and 23 are not connected to each other, is first on the bottom of the solid filter element 15 the inner filter fabric 28 applied and then the outer 27 in such a way that their edges 27A . 28A yourself like in 8th represented around the edge of the element 15 lay. Then the enclosure becomes 23 added. Thanks to the slightly inclined surfaces of the mount 23 and the element 15 and their exact dimensioning (which provides a distance D1 between the inclined parts in the assembled state ( 8th ), the thickness of the folded filter layer 27A corresponds), are also the filter layers 27 . 28 firmly joined together when the enclosure 23 and the element 15 are composed.

It is important to underline that the connection by pinching the shape between the enclosure 23 and the filter element 15 could be replaced by another conventional, mechanical connection, for example, a groove or a connector provides.

Then the enclosure becomes 23 over the screws 24 with the spacer 17 connected, whereby the assembly of the pressing head is completed.

It should be underlined that the system for connecting the filter layers 27 . 28 with the press head compared to other systems, for example, provide clamping devices, represents a fast, easy and reliable solution. This connection system can be advantageously used for any type of presser of a known press for the production of both single-layer and multi-layer tiles, provided that in the press head filter elements and a skirt are provided, which are arranged as described above.

The mount 23 moreover allows a cost savings in the necessary for the use of the presser spare parts. It has been found in experiments that the most worn part of the pressing head is the middle part, in the example according to the invention with the solid filter element 15 is occupied while the peripheral portion of the pressing head, according to the invention with the enclosure 23 busy, less wear and tear is experienced. Thanks to the splitting of the solid filter element in the enclosure and the true filter element, it is possible to use only the solid filter element 15 replace when it is worn, but not the surrounding area of the mount 23 is occupied so that the overall maintenance cost of the device can be reduced.

On the other hand, due to poor head-to-frame alignment, the head could fail with respect to the locking frame 10 of the carrier 11 come. These punches usually only affect the edge 23 of the head, which could be replaced by a corresponding spare part.

Outside at the presser and connected to it are facilities 7 for sucking off the Press water that passes over the edge of the mold when the presser is in it ( 3 and 4 ), as well as the press water, which has collected in the pressing head of the presser and by the compressed air flowing through the channels 14A , Federation 18 as well as through the chambers 19 sent, is pushed out.

The suction devices 7 are for a person skilled in the art of conventional type and are for example in the application EP 1 201 382 which is why they are not explained here. These devices essentially include an outer frame 29 ( 1 ), which has spring mechanisms 30 with the upper Andrückerträgerplatte 12 is connected, where this outer frame 29 channels 31 provides that are connected to suction devices, not shown, and below via a suction port 32 feature. When the pusher enters the mold, the suction port positions itself 32 , as in 4 shown on the flat top 10B of the locking frame 10 and its carrier 11 the form. In this position ( 4 ) closes the outer edge 32A the suction opening 32 with the top 10B on which he rests, essentially tight, while the inner edge 32B allows the flow of pressurized fluid (fluid) from the contactor to the suction port out.

The operation of the device according to the invention is the following: After filling the cement paste in the mold, the pressing head 4 pressed by progressive pressing into the mold, so that as much water as possible exits the mass to obtain a tile in the desired consistency. The water from the mass flows due to the pressing process and after passing through the flexible filter elements 27 and 28 filtered through the vertical channels 21 the solid filter element 15 and over the upper channels 22A . 22B and the circulating channel 22C of the element 15 to the edge of the presser and the lateral outlet channels 20 to the suction devices 7 and partly in the chambers 19 of the element 17 , At the end of the pressing process, and preferably when the head is still in the mold, compressed air (as indicated by arrows Z in FIG 3 represented) through the channels 14A and B as well 18 sent by the pusher, so that in the chamber 19 and the channels 22A , B and C existing water due to the force through the side channels 20 out and to the outer edge of the presser to the suction opening 32 the outside of the Andrückers suction 7 is pressed.

• a) Das Einleiten der Luft in den Andrücker erfolgt während des Pressens der Masse, die üblicherweise bei einem spezifischen Druck von mehr als 100 kg/cm² gepresst wird, während die Druckluft immer mit einem Druck von höchstens 10 kg/cm² eingeleitet wird. Diese Druckdifferenz hindert das Wasser somit daran, wieder in die mittlerweile gepresste Masse zurückzufließen.
• b) Die Kanäle 22A, B, C und die Öffnungen 20 in den Seiten des Andrückers ermöglichen ein Austreten des Wassers, da sie mit einem Vakuum verbunden sind, da der Andrücker auf seinem Rückweg über den Rahmen 29 mit einer Vakuumpumpe verbunden ist. Somit wird das durch die Druckluft herausgedrückte Wasser in einen Unterdruckbehälter geleitet.
• c) Die Filtergewebe 27, 28, mit denen der Andrücker ausgestattet ist, sind auf der Seite, die mit der Masse in Berührung kommt, hoch permeabel, während die gegenüber liegende Seite, die zum Andrücker weist, kaum durchlässig ist. Aus diesem Grund dringt kein oder nur sehr wenig Wasser durch das Filtergewebe, und aus dem unter Punkt a) dargelegten Grund steht das Wasser eventuell auf der dann mittlerweile gepressten Masse, von wo es über die frei gelassenen Öffnungen zwischen dem Feststellrahmen 10 und der Einfassung 23 abgesaugt wird, so wie es beim Absaugen überstehender Grate im bekannten Verfahren zur Herstellung einschichtiger Fliesen durch Entwässerung und Absaugen überstehender Grate geschieht und im bereits erwähnten Patent EP 1201382 beschrieben wird. Zu diesem Zweck ist darauf zu achten, den Presskopf für einen kurzen Moment stillzuhalten, sobald er nicht mehr in Kontakt mit der Masse steht.

The compressed air introduced into the presser can not press back the leaked water from the tile after the pressing process for the following reasons back into the cement paste:

• a) The introduction of the air in the presser takes place during the pressing of the mass, which is usually pressed at a specific pressure of more than 100 kg / cm ² , while the compressed air is always introduced at a pressure of at most 10 kg / cm ² . This pressure difference thus prevents the water from flowing back into the now pressed mass.
• b) The channels 22A , B, C and the openings 20 in the sides of the pusher allow leakage of water, since they are connected to a vacuum, as the pusher on its way back across the frame 29 connected to a vacuum pump. Thus, the pushed out by the compressed air water is passed into a vacuum tank.
• c) The filter fabrics 27 . 28 , which is equipped with the presser, on the side which comes into contact with the mass, highly permeable, while the opposite side, which faces the contactor, is hardly permeable. For this reason, no or very little water penetrates through the filter fabric, and for the reason outlined under point a), the water may possibly be on the now then pressed mass, from where it over the vacant openings between the locking frame 10 and the mount 23 is sucked, as it happens during the extraction of protruding burrs in the known method for producing single-layer tiles by dewatering and aspiration supernatant ridges and in the aforementioned patent EP 1201382 is described. For this purpose, care should be taken to hold the press head for a short moment as soon as it is no longer in contact with the mass.

Subsequently, will the presser completely removed from the mold.

The accumulated in the presser press water can also be removed at a specially designed station, which is located downstream of the pressing station. In this case, the presser is removed from the mold after the pressing process and driven to the water discharge station (or alternatively, the mold is driven away with the pressed tile and driven under the presser an element for receiving the press water and the filter cleaning water). In this working phase, the air passes through the channels 14 and 18 sent so that the water escapes from the Andrücker and through the suction of the type described above 7 or by means of similar means and / or suction or simple draining devices is sucked at the bottom of the collecting element. That of the layers 27 . 28 absorbed water is pushed out by means of compressed air down into a collecting container. Alternatively or additionally, these layers can be "wrung out" by the presser on a grate is pressed.

According to the invention, it is also possible to perform a filter cleaning by passing through the channels 14 and 18 or by other similar channels (not shown) intended for this purpose, pressurized with cleaning water and / or cleaning air or other suitable cleaning liquid or a mixture of liquid and / or gas suitable at least in part for the solid particles Remove filters. In this way it is possible to set time-definable and in their way adjustable water drainage and filter cleaning cycles, which can also be based on parameters such as paste mass, their color, room temperature, cement quality, etc.

Thanks to the device according to the invention, the cement paste is no longer claimed as in the known solutions by the action of suction devices that are directly connected to the solid filter elements of the pressing head, but the liquid portion simply flows upwards and partially distributed in the tissue of the flexible filter elements 27 . 28 , partly in the horizontal channels 22A , B and C of the solid filter element 15 , partly in the chambers 19 of the spacer 17 and partly via the side channels 20 to the outer edge of the Andrückers and the suction devices 7 out.

The missing facilities for sucking off the press water in the presser reduced in comparison with the known state of the art also the fouling the filter elements, since the solid particles of the cement paste not be sucked together with the water with pressure upwards.

It should finally be noted that the form described so far served only as an example and numerous variants are possible, all of which belong to the same inventive concept, such as the channels 18 . 14A . 14B , and the chambers 19 be designed to initiate the pressurized air and / or the cleaning liquid differently than described here but could nevertheless be suitable to feed said air and / or liquid evenly into the filter elements and at the same time at least part of the exiting during the pressing operation of the cement mass water temporarily record. For example, inside the chambers 19 and / or the channels 22A . 22B and 22C sponge-like materials are provided, which are suitable to absorb the press water.

It is finally to underscore that up to this point always from a device for the production of tiles the speech was. This device is however for the production of cement products generally suitable, that too over larger dimensions feature as tiles. For this reason, in the present context is under tile to understand any type of cement product.

Claims (28)

Apparatus for the production of cement products, in particular tiles, comprising: at least one mold having a closed bottom ( 1 ), at least one, relative to this form movable Andrücker ( 2 ) and a movement mechanism ( 3 ) for the presser, which is adapted to a pressing head ( 4 ) of the presser ( 2 ) at least partially into the interior of the mold ( 4 ) to move to a cement paste ( 5 ) in the interior of the mold to form the product or the tile, and then to remove this head from the mold, wherein the presser ( 2 ) with drainage devices ( 6 . 7 ), which are designed to remove the mass during the pressing operation ( 5 ) discharge water from the mass, wherein the drainage devices in the head at least one filter element ( 16 . 21 ), which is designed so that the water contained in the mass flow during the pressing process in the presser and can be separated from the solid particles of the mass, characterized in that in the presser ( 2 ) provided drainage facilities at least one collecting element ( 27 . 28 . 21 . 22A . 22B . 22C . 19 ) adapted to temporarily store at least a portion of the water flowing into the presser during the pressing operation, the collecting element being in contact with the exterior of the presser and having means ( 14A . 14B ) is connected to the supply of pressurized liquid or fluid, which is adapted to transport the stored water through the connection out of the presser. Apparatus according to claim 1, characterized in that the drainage devices ( 7 ) outside of the presser ( 2 ) and at the level of the connection with the exterior of the presser of the collecting element ( 22A , B, C, 19 ) Water suction devices ( 7 ). Device according to claim 1, characterized in that the collecting element ( 22A . 22B . 22C . 19 ) with a plurality of vertically extending channels ( 21 ), which allow the press water to flow into the presser, and a plurality of other channels ( 20 ), which is the collecting element with the exterior of the Connect presser. Apparatus according to claim 3, characterized in that the collecting element comprises a plurality of channels ( 22A . 22B . 22C ). Device according to claim 4, characterized in that the channels ( 22A . 22B . 22C ) evenly inside the presser ( 2 ) are distributed along a surface substantially corresponding to the pressing surface. Apparatus according to claim 4, characterized in that the collecting element contains at least one further collecting chamber ( 19 ) above the channels ( 22A . 22B . 22C ) lies. Device according to claim 1, characterized in that the collecting element ( 22A . 22B . 22C . 19 ) an element ( 27 . 28 ), which consists of a material capable of absorbing the water and which extends substantially over the entire surface of the pressing head ( 4 ). Device according to Claim 1, in which the filter element comprises at least one first filter element ( 15 ) comprising a solid and perforated plate and a second flexible filter element ( 16 ), which is suitable to come into direct contact with the mass and performs a finer filtering than the first element, characterized in that at least one of the filter elements is such that it also as a collecting element for at least a portion of the press water (Press Fluids). Device according to Claim 8, in which the flexible filter element ( 16 ) over several layers ( 27 . 28 ), which are suitable for carrying out a filter function running from the outside inwards and progressively decreasing in that direction, characterized in that the collecting element for the press water (pressurized fluid) has one of these layers ( 28 ). Apparatus according to claim 1, which in the pressing head via at least a first fixed filter element ( 15 ), which is capable of exerting the required pressure on the cement paste, and a plurality of vertically extending channels ( 21 ), which are suitable for directing the press water into the interior of the presser, and at least one second flexible filter element ( 16 ) which is capable of directly contacting the mass and performing a finer filtering than the first element, characterized in that the first, fixed filter element has at least two separate parts: a first part ( 15 ) with the vertical channels ( 21 ) and a second circumferential frame-shaped part ( 23 ), which is adapted to receive in its interior the first part via a detachable connection. Apparatus according to claim 10, characterized in that the opposite edges of the two parts ( 15 . 21 ) of the solid filter element ( 15 ) are both inclined. Device according to claim 11, characterized in that the opposite edges of the two parts ( 15 . 21 ) of the solid filter element ( 15 ) are both inclined, in such a way that the first part can be inserted only from above into the second part and then firmly in this position, without a horizontal movement would be possible. Apparatus according to claim 11, characterized in that the flexible filter element ( 16 ) is dimensioned so that part of its outer edge ( 27A ) at least partially around the edge of the first part ( 15 ) of the solid filter element can be placed so that when the first part in the second frame-shaped part ( 21 ) is inserted, this edge of the flexible filter element between the inclined edges of the first and the second part of the fixed filter element is clamped and held. Apparatus according to claim 10, characterized in that the circumferential, frame-shaped part ( 23 ) on its lower surface, which comes into contact with the cement paste, a part ( 26 ) made of rubber or polyurethane. Device according to claim 14, characterized in that the part made of rubber or polyurethane ( 26 ) is vulcanized. Device according to claim 14, characterized in that the part of rubber or polyurethane ( 26 ) in a recessed receptacle in the lower surface of the frame-shaped part ( 23 ) is located. Apparatus according to claim 10, characterized in that the circumferential, frame-shaped part ( 23 ) on facilities ( 24 . 24A ) releasably releasing it with another part ( 17 ) of the presser ( 2 ) connect. Apparatus according to claim 10, characterized in that means for connecting the two parts ( 15 . 21 ) of the solid filter element ( 15 ) are provided, which operate on the slot or plug-in principle. Apparatus according to claim 1, characterized in that the presser ( 2 ) over several spacers ( 12 . 13 . 14 . 17 ), which are releasably connected to each other and in the interior Ka passages ( 14A . 14B . 18 . 19 ), which are adapted to supply the press water collecting element with a pressurized liquid (or fluid). Device according to claim 1, characterized in that the pressing head ( 4 ), the following, releasably interconnected, superimposed elements comprises: a spacer ( 17 ), a first fixed filter element ( 15 ) and second, flexible filtering and absorbing elements ( 16 ), wherein the spacer ( 17 ) in its middle part via at least one vertically extending channel ( 18 ) for the supply of a pressurized liquid (or fluid) and at the level of its underside at least one downwardly open chamber ( 19 ) with the vertical channel ( 18 ), and this at least one chamber ( 19 ) with several upwardly open, into the surface of the solid filter element ( 15 ) recessed channels ( 22A . 22B . 22C ), and this spacer ( 17 ) on its sides a plurality of horizontally extending channels ( 20 ), which with the upwards to the fixed filter element ( 15 ) open channels ( 22A . 22B . 22C ) are connected. Device according to claim 1, characterized in that the spacer ( 17 ) has a substantially square shape with a square base and four, arranged along the diagonal downwardly open chambers ( 19 ). Device according to claim 1, characterized in that devices ( 14A . 14B ) are provided for the introduction of alternatively air or an air-liquid mixture for cleaning the filter elements ( 15 . 16 ), or only a cleaning liquid for cleaning the filter elements ( 15 . 16 ). Device according to Claim 22, characterized in that the means for introducing a cleaning fluid are the same devices ( 14A . 14B ) acts as for the introduction of a pressurized fluid (fluid), so that these devices can be used both for the discharge of the press water (press fluid) out of the presser and for the cleaning of the filter elements. Device according to claim 1, characterized in that that the pressure of the pressurized fluid (fluid) is lower is like that of the presser pressure applied to the cement paste. Apparatus according to claim 24, characterized in that the pressure of the liquid (fluid) is less than 10 kg / cm ² , while the pressure exerted by the presser pressure above 100 kg / cm ² . Device according to claim 2, characterized in that the external devices ( 7 ) for dewatering by the supply of the pressurized fluid (fluid) in the presser ( 2 ) are driven, so that a negative pressure is created, which is suitable to press the press water (press-fluid) to the outside. Apparatus according to claim 8, characterized in that the surface of the flexible filter element ( 16 ) located opposite the surface which may come into contact with the cement paste, which is treated so as to be easily permeable. Device according to claim 4, characterized in that it comprises a first group of parallel channels ( 22A ) and a second group of parallel channels ( 22B ), which are arranged at equal distances from each other, so that a grid is formed, which divides the surface of the collecting element into equal areas.