EP3792026A1 - Method for dosing a liquid or paste building material - Google Patents

Abstract

The invention relates to a method for metering a liquid or pasty building base material, in particular a concrete mix, by providing and starting up a pump device (1) which pumps the liquid or pasty building base material out of a reservoir (2) so that the building base material within and along at least one with the Reservoir (2) connected hose element (3) of the pump device (1) is transported in the direction of a distributor element (4).

Description

The present invention relates to a method for metering a liquid or pasty building material, in particular a concrete mixture, and a device for metering a liquid or pasty building material, in particular a concrete mixture according to the respective preambles of claims 1 and 10.

The production of concrete slabs and / or terrace slabs known from the prior art is generally concerned with the most precise possible metering of such a building material, in particular with such a metering of concrete and further in particular with exact metering of a facing and / or backing concrete.

Facing concrete is a first layer and / or layer that is filled into corresponding filling molds, with a back concrete and / or a second layer being applied to the facing concrete in a second step so that, for example, only the Back concrete is visible to the user.

Previous methods for metering such a building material are not only cost-intensive, but also difficult to carry out. Above all, a corresponding cleaning after using a corresponding device for metering the liquid or pasty building material can only be carried out with great effort.

This is due, among other things, to the fact that, in order to clean a corresponding device, the device generally only had to be cleaned with a high-pressure cleaner, since it solidified or semi-solidified building material could often only be removed from the device in this way. Due to the water jet applied under high pressure, corresponding hardened concrete residues can be blown away from the machine.

The respective cleaner of the device is, however, gradually exposed to large streams of dirt (consisting of water and building material) during cleaning. In other words, such a cleaner was very dirty after cleaning such a device.

In particular, a change in the dosing amount was made more difficult because the respective device had to be cleaned by means of the high-pressure cleaner to change a dosing amount, so that an exchange of the dosing sockets of the device was only possible after such cleaning.

Another problem in the prior art was the distribution of the building material on a rubber mattress, since the building material is sometimes very sticky and the addition of water for cleaning this rubber mat was often limited.

Based on the problems described above, it is therefore, inter alia, an object of the present invention to offer a method and a device for metering a liquid or pasty building material, in particular a concrete mixture, which not only enables the device to be operated in a particularly simple and cost-effective manner and facilitates implementation of the method, but also improves maintainability and at the same time facilitates dosing of the respective liquid or pasty building material.

This object is achieved by the subject matter of claim 1 and by the subject matter of claim 10.

In particular, the method for metering a liquid or pasty building material, in particular a concrete mix, includes a first step, after which a pump device is first provided and put into operation, which pumps the liquid or pasty building material out of a reservoir so that the building material inside and along at least a hose element connected to the reservoir the pump device is transported in the direction of a distributor element, in particular a distributor valve.

The pump device can be a concrete pump. A reservoir can be a vessel that holds the concrete.

In the context of the invention, "hose element" means any tubular connection between the pump device and the distributor element. The hose element can also be a static, permanently mounted pipeline. As an alternative or in addition, the hose element can also be a plastic hose, in particular a rubber hose, which is flexibly equipped.

“Flexible” in this context means that the hose element is set up and provided to be bent without the hose element suffering structural damage, for example cracks.

In a further step, the distributor element is used to open and at least partially close an opening of the hose element, from which the building material exits, depending on the operating mode, and the opening of the hose element is held in front of at least one filling mold into which the building material is dosed during a filling process becomes.

The hose element therefore has at least two openings. A first opening is connected to the reservoir and to the pump device, into which the liquid or pasty building material is pumped by the pump device and thus pressed in, while the above-described opening of the hose element (second opening) is the opening from which the liquid or pasty Building material emerges again.

According to at least one embodiment, during a closed state of the distributor element and by means of the distributor element, the building material is returned to the reservoir by means of redistribution, without a pump output of the pump device having to be reduced because of the closed distributor valve. The "redistribution" can be a pipe and / or hose system.

The current state of the art offers the possibility under certain circumstances to create a closed state by means of a corresponding distributor element in order to abort or interrupt a filling process, but in the state of the art the pump device must then at least be reduced in the pumping capacity, but usually completely switched off , since no building material can escape from the opening of the hose element. Switching off the pump therefore prevents backflow up to the reservoir, so that the hose element also prevents the hose element from bursting.

One idea of the present application is therefore to use redistribution, provided the distributor element is at least partially closed, to return the building material at least partially, but preferably completely, back into the reservoir so that the pump performance of the pump device can be maintained without restriction, for example. When a filling process starts again, only the distribution valve is opened, so that instead of using the redistribution, the building material again partially, preferably completely, exits the opening of the hose element.

The redistribution is therefore fluid-tight on the one hand, in particular with a further opening of the distributor element, and a second opening of the redistribution ends, for example, in the reservoir in order to be able to supply the building material to the reservoir again.

For the purposes of the invention, the distribution element described here is one which has a switch or a diversion element by means of which the building material can be directed back into the reservoir. The two or more openings can then be controlled, for example, by means of such a diversion element.

In particular, the distributor element can be a distributor valve, the distributor valve thus being such a component which serves to shut off or control the flow of the building material.

For example, the valve can be a shut-off valve (for example a plate, ball, cone or needle). However, a valve with a rubber membrane (such as a hose valve, pinch valve) is also possible.

According to at least one embodiment, the method for dosing a liquid or pasty building material, in particular a concrete mixture, comprises a first step, after which a pump device is first provided and put into operation, which pumps the liquid or pasty building material out of a reservoir, so that the building material within and is transported along at least one hose element connected to the reservoir of the pump device in the direction of a distributor element, in particular a distributor valve, whereby the distributor valve opens or at least partially closes the opening of the hose element from which the building material then exits again, depending on the operating mode, and further, the opening of the hose element being held during a filling process via at least one filling mold into which the building material is metered.

In particular, during a closed state of the distributor element and by means of the distributor element, the building material can be returned to the reservoir by means of redistribution, without the pumping capacity of a pump device having to be reduced because of the closed distributor element.

The pumping power of the pumping device preferably remains constant in the closed state of the distributor element.

As an alternative to this, the pump output decreases during an at least partial, in particular during a completely closed state of the distributor element by not less than 10%, preferably not less than 20%, of a continuous pump output of the pump device. The "continuous pumping power" can be a pumping power with which the building material is poured into the filling molds as part of a metering operation.

The building material can be facing and / or backing concrete. Facing concrete is the top layer of a two-layer concrete element, for example a paving stone. This facing layer is resistant to wear, abrasion, frost and oil. The facing layer can also be ferro-blasted to improve the appearance. Back concrete is a layer under the facing concrete, which guarantees the concrete element a static load-bearing capacity.

In addition, it is conceivable that the filling form and / or the doser and / or the distribution element is at least partially or completely produced with one of the following 3D printing technologies in question:

1. The FDM process (Fused Deposition Modeling) Alternative names: Fused Filament Fabrication (FFF), Fused Layer Modeling (FLM)

The process refers to the application of layers (extrusion) of a material through a hot nozzle. The consumable material is in the form of a long wire (so-called filament) on a roll and is pushed by the conveyor unit into a print head, melted there and placed on a print bed. The print head and / or print bed can be moved in 3 directions. In this way, layers of plastic can be applied to one another in stages.

2. The SLS process (selective laser sintering)

In contrast to the sintering process, in which substances are bonded together in powder form under the action of heat, in the SLS process this is done selectively by a laser (alternatively also electron beam or infrared beam). So only a certain part of the powder is melted together.

For this purpose, a thin layer of powder is always applied to the printing bed by the coating unit. The laser (or another energy source) is now aimed precisely at individual points of the powder layer in order to form the first layer of the print data. The powder is melted or melted and then solidifies again by cooling it slightly. The unmelted powder remains around the sintered areas and serves as a support material. After a layer has solidified, the print bed lowers by a fraction of a millimeter. The coating unit now moves over the print bed and applies the next layer of powder. The second layer of the print data is then sintered by the laser (or other energy source). This creates a three-dimensional object in layers.

3. Three-Dimensional Printing (3DP)

The 3DP process works very similarly to selective laser sintering, but instead of a directed energy source, a print head moves over the powder. This releases tiny droplets of binding agent onto the underlying powder layers, which are thus bonded to one another. Otherwise this procedure is the same as the SLS procedure.

4. Stereolithography (SLA)

Instead of a plastic wire or printing material in powder form, liquid resins, so-called photopolymers, are used in the stereolithography process. They are hardened in layers by UV radiation and thus create three-dimensional objects. To do this, the construction platform in the Harz Basin is gradually lowered. There are also variants (the so-called Polyjet process) without an entire tank with liquid resin. For this, an epoxy resin is applied drop by drop from a nozzle and cured immediately by a UV laser.

5. Laminated Object Manufacturing (LOM) Alternative designation: Layer Laminated Manufacturing (LLM)

The process is based neither on chemical reactions nor on a thermal process. A separating tool (e.g. a knife or carbon dioxide laser) is used to cut a film or plate (e.g. paper) along the contour and glue it on top of each other in layers. By lowering the construction platform, a layered object is created from glued, overlapping foils.

GF:

Glasfasern

GB:

Glaskugeln

MF:

Mineralfasern

MX:

nicht spezifizierte Mineralfüllung

GX:

nicht spezifizierte Glasfüllung

CD:

Kohlenstoffmehl

P:

nicht spezifiziertes Füllmehl

In principle, the following materials, which are not listed exhaustively, come into question as materials for 3D printing: Material group modification SHORE D SECTION 75-93 ABS + 30 mass% GF 62 - 68 ABS / TPE 46 ABS / TPU 58-68 ASA 75 ETFE 60-78 EVA 17-45 PA 11 PA 11 + 23 mass% GF 70 PA 12 PA 12 (normal moist) 75-78 PA 12 + 30 mass% GF (normal moist) 75 PA 612 73 PA 6 PA 6 (normal moist) 52-77 PA 6 + 30 mass% GF 48-80 PA 6 + 30 mass% GF (dry) 84 PA 66 PA 66 + 30 mass% GF 77-82 PA 66 + 30 mass% GB 81 PA 66 + 30 mass% MX 75-82 PAEK 86-90 PAEK + 30 mass% GF 90 PBI 99 PBT 79-86 PBT + 30 mass% GF 53 - 85 PBT + 30 mass% GX 54 Pc 51-85 PC + 30 mass% GF 65-72 PC + 30 mass% GX 70 PCTFE 76 - 80 PE-HD 56-69 PE-LD 39 - 83 PE-LLD 38-60 PE-MD 45 - 60 PE-UHMW 60-65 PEEK 83-88 PEI 88-90 PEK 87 PEK + 30 mass% GF 90 PET PET + 30 mass% GF 63-65 PMMA 52 - 85 PMMA + 30 mass% GF 55 POM 52 - 83 PP 59-77 PP + 30 mass% GF 62 - 80 PP + 30 mass% CD 74-75 PP + 30 mass% MF 60-74 PP + 30 mass% P 65 PP + 30 mass% CaCO ₃ 55-70 PP / EPDM 40 PS 78-80 PTFE 50-90 PURE 20-84 PVC-U 74-94 PVC-U / NBR 58-74 PVC-P 42-77 PVC-C 82 PVDF 46 - 79 SAN 45-85 SMMA 72-82 TPC 28-82 TPE 48-78 TPE / PTFE 56 TPE-E TPE-E + 30 mass% GF 55 TPO 16-70 TPS 60 TPU TPU + 30 mass% GF 74-80 TPV 40-51 where:

GF:

Fiberglass

GB:

Glass balls

MF:

Mineral fibers

MX:

unspecified mineral filling

GX:

unspecified glass filling

CD:

Carbon flour

P:

unspecified filling flour

For example, the filling mold is made of the material PA6 (a hard plastic).

The filling mold can also have at least one coating made of a further and in particular a different material. For this purpose, a material can come into question which ensures that the building base material can be particularly easily removed from the filling mold again after or before hardening. Such a material can therefore form and / or assume the function of a Teflon layer.

In a further advantageous embodiment, a further component is added to the plastic in order to promote crosslinking. This further component is advantageously added in a resign. This further component is advantageously a crosslinking booster. The plastic materials PA or PBT can preferably be crosslinked.

The degree of crosslinking (also called gel fraction) can be used to verify crosslinking. This gel fraction is determined based on DIN 16892/120 by boiling for several hours in a suitable solvent (e.g. formic acid). It is determined gravimetrically how high the mass of the crosslinked material is in relation to the total mass. A soldering iron test according to PTS specifications is also common for practical quick tests. The gel fraction or the degree of crosslinking is advantageously above 10%, preferably above 30%, and particularly preferably above 50%.

According to at least one embodiment, a first operating mode is an open position of the distributor valve so that the building material is transported into the filling mold, and a second operating mode of the distributor element is a closed position which at least partially closes the opening.

The distributor element can be opened and closed manually and / or mechanically, for example via an automatic lock. It is conceivable that a control unit uses a corresponding sensor system to determine whether the opening is positioned above the filling mold according to the correspondingly preset operating conditions and the distributor valve is only opened manually or fully automatically and then closed again after it has been correctly positioned.

According to at least one embodiment, a plurality of filling forms, in particular arranged in a matrix-like manner, are filled by an operator and / or by an operating device at least partially, preferably one after the other.

"Matrix-shaped" in this context means an arrangement of the filling shapes in a plane perpendicular to a filling direction (preferably in the direction parallel to the direction of gravity) in the form of rows and columns, so that the filling shapes are preferably arranged equidistant from one another along these rows and columns.

For example, the filling shapes are filling shapes of the same or different volume.

According to at least one embodiment, the filling form or filling forms are filled semi-automatically or fully automatically by means of an operating device, so that the filling forms are moved one after the other and thus filled one after the other. The operating device can comprise or be the control unit mentioned above.

According to at least one embodiment, the operating device is a filling robot which fully automatically fills the filling mold or molds.

The filling robot can therefore be a fully automatically operated robot which, once switched on and operated and / or regulated by the above-mentioned control unit, carries out a filling process from start to finish without further assistance. It is conceivable that the filling process is only ended after the last filling form to be filled has ended and the filling robot then returns to a rest position.

According to at least one embodiment, the pump device has at least two, for example four or more, hose elements, with this or this hose element (s) being picked up by an arm of the operating device before filling, with such a hose element or one above each filling form the hose element associated with this filling form is positioned and then, simultaneously or one after the other, different filling forms are filled and thus run off. The majority of the hoses can therefore be connected in parallel to one another, which can mean that each of the openings of the hoses, from which the building material emerges again, is for example held at the same time over filling forms arranged in each case over the openings.

In this context, it is conceivable that a robot arm of the operating device grips the majority of the hoses at once in the area of the openings, thus in the area of their ends. For example, the ends of the hoses are attached to a common bracket. The robot arm then fixes all ends of the hose elements simultaneously over the corresponding filling molds, so that these corresponding filling molds can be filled simultaneously with one filling process. It should be noted, however, that not only two or four filling forms can be filled at the same time, but also any more filling forms can be filled in one filling process.

According to at least one embodiment, the opening of the hose or the respective openings of the hose elements are at least temporarily fixed during the filling process and thus remain immobile, while an at least partially still unfilled further filling form is moved under the opening (s) by means of a control unit after each completed filling process .

The control unit described here can be the control unit already described above or a further control unit.

In other words, in such an embodiment, instead of moving the openings of the hose elements relative to the stationary device, the filling molds are moved. Such a movement of the filling forms, but also a movement of the hose element itself, can take place in the form of a revolver-like rotation.

According to at least one embodiment, the pump device has a screw conveyor, or is one which transports the building material along a screw transport path and transports the building material into the hose element, in particular presses it into it, preferably transports it alone and presses it into it, the building material being extracted from the by means of a pump pressure generated in this way Orifice with the expression pressure greater than zero exits.

In the case of the pump device produced in this way, it can be part of a screw conveyor or it can also form a screw conveyor. A screw conveyor is based on the functional principle of an Archimedean screw, for example the screw conveyor lying in a trough, usually motor-driven, transports the building material over several meters.

The functioning of a screw conveyor is described, among other things, by the fact that gravity and the friction of the transported goods on the trough walls prevent the building material from rotating with the screw. It therefore becomes the building material continuously transported, whereby it is possible to transport the building material horizontally, diagonally or vertically.

According to at least one embodiment, the pump device is a hydraulically, electrically or pneumatically operated pump, with the building material emerging from the opening with an outlet pressure greater than zero, preferably by itself, by means of a pump pressure generated in this way.

The screw conveyor mentioned above can also be combined with a further pump device which is operated hydraulically, electrically or pneumatically.

For example, the building material can first be pumped out of the reservoir by means of a hydraulically, electrically, pneumatically operated pump and then, before the building material reaches the hose element, the building material can be transported on to the hose element in a screw conveyor.

The present invention further relates to a device for metering a liquid or pasty building material, in particular a concrete mixture, all of the features disclosed for the method described above being disclosed for the device described here, and vice versa.

According to at least one embodiment, the device described here comprises at least one pump device which pumps the liquid or pasty building material out of a reservoir, so that the building material inside and along at least one hose element connected to the reservoir of the pump device in the direction of a distribution element, in particular a distribution valve, of the device is transported, wherein an opening of the hose element can be opened or at least partially closed by the distributor element depending on the operating mode, and furthermore the opening of the hose element can be held during a filling process via at least one filling form into which the building material can be metered.

According to at least one embodiment, the device has at least one redistribution, so that, during a closed state of the distributor element, the building material can be returned to the reservoir via the redistribution by means of the distributor element is without a pumping capacity of the pump device having to be reduced because of the closed distributor element.

In general, the redistribution can be a hose and / or pipeline system.

• Die Figur 1 zeigt eine Seitenansicht eines Befüllungsvorganges durch hier beschriebene Vorrichtung, wobei
• die Figur 2 eine Draufansicht der in Figur 1 gezeigten Vorrichtung und des in der Figur 1 gezeigten Verfahrens zeigt.

The invention is described in more detail below with reference to figures.

• The Figure 1 shows a side view of a filling process by the device described here, wherein
• the Figure 2 a top view of the in Figure 1 device shown and in the Figure 1 shows the procedure shown.

Identical or identically acting components are each provided with the same reference symbols in the figures.

In the Figure 1 a device 1000 according to the invention and a method 100 according to the invention are shown on the basis of an exemplary embodiment.

As from the Figure 1 can be recognized, the device 1000 comprises a pump device 1, which pumps out the liquid or pasty building material from a reservoir 2, so that the building material within and along at least one hose element 3 of the pump device 1 connected to the reservoir 2 in the direction of a distributor element 4, in particular the Distribution valve 4, the device 1000 is transported.

The pump device 1 initially comprises a screw conveyor 11 which transports the building material along a screw transport path 11A and transports the building material into the hose element 3 and, preferably alone, by means of a pump pressure generated in this way, the building material emerges from the opening 31 with an outlet pressure greater than zero. The hose element is connected to the screw conveyor 11 in a fluid-tight manner.

The device 1000 comprises an opening 31 of the hose element 3 which, depending on the operating mode, can be opened or at least partially closed by the distributor element 4 and wherein furthermore the opening 31 of the hose element 3 can be retained during the filling process via at least one filling mold 5 into which the building material is metered.

As can be seen, the hose element 3 is interrupted by the distributor element 4 in the present exemplary embodiment. The hose element 3 is therefore formed with a first part 3A, a second part 3B and a third part 3C, whereby in other embodiments, among other things, the part 3B can be dispensed with. Part 3A can be a first hose element, in particular within the meaning of the invention, and part 3B can be a further hose element which connects a doser 9 to the distributor element 4 in a fluid-tight manner.

The dosator 9 can be a filler neck. However, it is also conceivable that the dosator 9 itself once again has a valve which must also be opened so that the building material can exit from the opening 31.

It is also shown that the device 1000 described here has an operating device 6, which is shown in the form of a filling robot 61. The filling robot 61 can be a purely mechanical device or a device operated electrically, pneumatically or in some other way.

A holding arm 61 A of the filling robot 61 therefore grips the opening 31 of the hose element 3 and holds it during the filling over the filling mold 5, the respective filling in the present exemplary embodiment being fully automatic, so that the opening 31 of the hose element 3 of the robot 61 takes place over time is held successively over selected filling molds 5, in particular over each of the filling molds 5.

However, it is also conceivable that instead of moving the opening 31 of the hose element 3 in the horizontal direction H and / or vertical direction V, the filling molds 5 themselves are positioned one after the other under the opening 31 of the hose element 3, which is then fixed relative to the device 1000.

The filling robot 61 is controlled by a control unit 7, which moves the opening 31 of the hose element 3 or the filling molds 5, respectively, in order to complete the filling process to be able to make. The control unit 7 also actuates, that is to say controls / or regulates, an opening and closing state of the distribution element 4.

A particularly advantageous feature here is the redistribution 41 (see in particular also Figure 2 ), which is positioned in such a way that during a closed state of the distributor element 4, the building material can be returned to the reservoir 2 via the redistribution 41 by means of the distributor element 4, without the pumping capacity of the pump device 1 having to be reduced because of the closed distributor element 4.

Can be recognized from the Figure 2 that the redistribution 41 is mounted on the distributor element 4 at a connection point 41A. In the distributor element 4 there is a changeover switch by means of which the corresponding building material can then be returned to the reservoir 2 in the closed state instead of through the opening 31 of the hose element 3.

The invention is not limited on the basis of the description and the exemplary embodiment; rather, the invention encompasses every new feature and every combination of features, which in particular also includes every combination of the patent claims, even if this feature or this combination itself is not explicitly stated in the patent claims or in the Embodiment is shown.

List of reference symbols

1

Pump device

2

reservoir

3

Hose element

3A

first part

3B

second part

3C

third part

4th

Distribution element

5

Filling form

6th

Control device

9

Dosator

61

Filling robot

61A

Holding arm

7th

Control unit

11

Transport screw

11A

Screw transport path

31

opening

41

Redistribution

41A

Connection point

100

Procedure

1000

contraption

Claims (10)

Method (100) for metering a liquid or pasty building material, in particular a concrete mixture, comprising the steps: - Provision and commissioning of a pump device (1) which pumps out the liquid or pasty building material from a reservoir (2) so that the building material inside and along at least one hose element (3) of the pump device (1) connected to the reservoir (2) in the direction a distribution element (4), in particular a distribution valve (4) is transported, wherein - By means of the distributor element (4) an opening (31) in the hose element (3), from which the building material then exits again, is opened or at least partially closed depending on the operating mode, and furthermore - the opening (31) of the hose element (3) is held during a filling process via at least one filling mold (5) into which the building material is dosed, characterized in that
During a closed state of the distributor element (4) and by means of the distributor element (4), the building material is returned to the reservoir (2) by means of a redistribution (41) without reducing the pumping capacity of the pump device (1) due to the closed distributor element (4) must become. Method (100) according to claim 1,
characterized in that
a first operating mode is an open position of the distributor element (4) so that the building material is transported into the filling mold (5), and a second operating mode of the distributor element (4) is a closed position which at least partially closes the opening (31). Method (100) according to claim 1 or 2,
characterized in that
several filling forms (5), in particular arranged in a matrix-like manner, can be filled at least partially, preferably one after the other, by an operator and / or by an operating device (6). Method (100) according to claim 3,
characterized in that
a filling of the filling form (s) (5) is carried out semi- or fully automatically by means of the operating device (6), so that the filling form (s) (5) are moved one after the other and thus filled one after the other. Method (100) according to at least one of the preceding claims,
characterized in that
The operating device (6) is a filling robot (61) which fully automatically fills the filling mold (s) (5). Method (100) according to at least one of the preceding claims,
characterized in that
the pump device (1) has at least two, for example four or more, hose elements (3), with this / s hose element (s) being picked up by an arm of the operating device (6) before filling, with the hose element (s) then before filling be positioned over each filling mold (5) and then simultaneously or one after the other different filling molds (5) are filled and thus moved. Method (100) according to at least one of the preceding claims,
characterized in that
the opening (31) of the hose (3) or the respective openings (31) of the hose elements (3) remain at least temporarily fixed and immobile during the filling process, while by means of a control unit (7) after each completed filling process under the opening (s) ( 31) an at least partially still unfilled further filling mold (5) is run. Method (100) according to at least one of the preceding claims,
characterized in that
the pump device (1) has or is a screw conveyor (11) which transports the building material along a screw transport path (11A) and transports the building material into the hose element (3) and, preferably alone, by means of a pump pressure generated in this way, the building material from the opening ( 31) exits with an outlet pressure greater than zero. Method (100) according to at least one of the preceding claims,
characterized in that
the pump device (1) is a hydraulically and / or electrically and / or pneumatically operated pump (1) and, preferably alone, the building material exits the opening (31) with an outlet pressure greater than zero by means of a pump pressure generated in this way. Device (1000) for dosing a liquid or pasty building material, in particular a concrete mixture, comprising: - At least one pump device (1) which pumps the liquid or pasty building material out of a reservoir (2) so that the building material inside and along at least one hose element (3) of the pump device (1) connected to the reservoir (2) in the direction of a distributor element (4), in particular a distribution valve (4), of the device (1000) is transported, wherein - An opening (31) of the hose element (3) can be opened or at least partially closed by the distributor element (4) depending on the operating mode, and furthermore wherein - the opening (31) of the hose element (3) can be held during a filling process via at least one filling mold (5) into which the building material can be dosed, marked by
at least one redistribution (41), so that during a closed state of the distribution element (4) the building material can be returned to the reservoir (2) via the redistribution (41) without the pumping power of the pump device (1) being impaired of the closed distribution element (4) must be reduced.

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