DE202013003472U1 - Apparatus for producing multicolored paving stones - Google Patents

Abstract

Device for producing multicolored concrete or paving stones with a first, downwardly open filling carriage, which is movable via a mold for concrete blocks for filling the mold for concrete blocks with a core concrete, and with a second filling carriage, which is movable over the mold for concrete blocks for filling the molding tool with a multicolored facing concrete mixture, characterized in that on the second filling carriage is an openable bottom concluding it downwards.

Description

The invention relates to a device for producing multi-colored paving stones with a first, downwardly open filling carriage, which is movable via a mold for concrete blocks for filling a mold for concrete blocks with a core concrete, and with a second filling carriage, which can be moved over the mold for concrete blocks is to fill the mold with a multicolored facing concrete mixture.

Devices of this type are known. They are part of a concrete block forming machine and are used in the production of concrete or paving stones with multi-colored surfaces, which have a color gradient formed by several individual colors. It has been found that to achieve a desired, perceived as natural appearance three different colors provide useful results and can be achieved from five or six different colors very satisfactory results.

The mentioned colored concretes are relatively fine and relatively expensive due to their color.

Therefore, one has gone over cost considerations to produce the volume of most of the individual concrete blocks by a simple and particularly cost-effective core concrete and only produce the visible later in the built stone surface with the finer and more expensive attachment material.

Thus, a first filling car is first filled with the core-concrete material and driven over the upwardly open mold. In this case, falling from the downwardly open charging car due to gravity and with the aid of a Vorvibration and a distribution device installed in the filling of the core concrete from above into the upwardly open mold.

When the first stuffing car has been completely over the mold, it is withdrawn, with the then retraced edge of the stuffing carriage being pulled over the surface of the concrete filled in the mold and leveling it with the upper edge of the mold.

After the first filling car has left the area of the molding tool, pressure pieces of a punch moved over the molding tool are briefly immersed in the individual mold cavities that make up the molding tool. These, together with an intermediate vibration of the mold, cause the core concrete in the mold to set and thus lower the surface of the core concrete in the mold below the upper edge of the mold.

The thus released above the core concrete space in the mold is then known to be filled with a multicolored intent concrete mixture.

In order to provide this multicolored concrete mixture for the surfaces / visible surfaces of concrete blocks, according to the state of the art, the concrete held in silos and separated by color is portioned into a filling funnel and transferred from the latter into the second filling carriage. In these process steps, the colors do not mix, since the concretes are about earth-moist and therefore individual portions do not mix with each other.

The second filling car, which was filled with the intent concrete mixture thus filled into it, thus moves over the mold and the facing concrete mixture contained in it is filled in the released during the previous shaking of the mold in this volume.

In this case, the second filling car must also be moved significantly beyond the mold addition: the front in the direction of movement in the loading carriage lying facing concrete mixture is already at the beginning, when the filling carriage comes over the mold, down into this, so that at the opposite end of the mold which is filled in the tool in the direction of movement of the filling carriage in the back of the filling compound header mixture. There is a quasi-partial redeployment of the intent concrete mixture located in the filling car from front to back and vice versa.

During the subsequent retraction of the filling carriage, the trailing edge of the filling carriage then also touches over the surface of the facing concrete mixture just filled in and pulls it smoothly.

However, in the facing concrete mixture, which consists of several differently colored concrete portions, the effect is that the individual colors are wiped into one another. This results in color gradients that are undesirable, especially because they are not reproducible and thus there is a risk that stones from different manufacturing batches can not be easily combined.

It is therefore an object of the present invention to further develop a device as indicated above, in order to avoid such a blurring of the colored mixed concrete mix. Since there is a high cost pressure on the market for concrete block forming machines due to the market conditions, a cost-effective solution should be found.

This object is achieved according to the invention by providing on the second filling carriage a bottom opening which closes it downwards.

The invention has the advantage that the second filling car can now be moved over the forming tool with the bottom closed, without thereby already admixed concrete mixture being discharged into the forming tool.

Only when the filling car has reached a position above the filling car, the soil is opened and the filler mixture located in the filling concrete mixture falls down into the mold. In this case, the facing concrete mixture in the filling car is not redeployed.

During the final retraction of the filling carriage, the trailing edge of the filling carriage can smooth out the surface of the facing concrete mixture just filled, but it has been found that the resulting blurring of the colored concretes is considerably lower than in the procedure described above without the openable floor.

In addition, the design described here also has the advantage that the second filling car no longer needs to be driven over the end of the mold addition, whereby a production cycle of such a further developed stone molding machine can be shorter and thus can achieve higher productivity.

Although the use of openable trays for stuffing car is already known, but the use of a first filler car with no bottom and a second filler car with soil and the resulting handling advantages while minimizing the number of components of such a stone forming machine and the resulting simpler and less expensive Manufacturability is not disclosed in the prior art and particularly advantageous.

In a particularly preferred embodiment, the openable bottom of the second filling carriage is hydraulically movable in this.

Due to the mobility of the floor in the filling itself, a compact design can be achieved. Even with work, which then z. B. the filling is removed for maintenance from the stone forming machine, such a unit has advantages.

In particular, the bottom is plate-shaped and can close the entire bottom surface of the second filling carriage in one piece.

This has the advantage that a particularly reliable construction is to be realized, since no small-scale, fault-prone solutions are to be built.

An illustration of the invention in a drawing and an explanation thereof is omitted, since a person skilled in the art can reproduce the invention based on the above explanations.

Claims (3)

Device for producing multicolored concrete or paving stones with a first, downwardly open filling carriage, which is movable via a mold for concrete blocks for filling the mold for concrete blocks with a core concrete, and with a second filling carriage, which is movable over the mold for concrete blocks for filling the molding tool with a multicolored facing concrete mixture, characterized in that on the second filling carriage is an openable bottom concluding it downwards. Apparatus according to claim 1, characterized in that the openable bottom of the second filling carriage is hydraulically movable in this. Apparatus according to claim 2, characterized in that the openable bottom of the second filling carriage is plate-shaped and has a size such that it closes the entire bottom surface of the second filling carriage in one piece.