Apparatus for serving compositions and its use

Abstract

Independent claim: A serving device for pasty and / or flowable materials, which comprises at least a housing with a supply area for the materials and at least one exit area for the materials, characterized in that at least one mixing area is formed between the supply area for the materials and the exit area for the materials, and the at least one mixing area forms at least one mixing device.

Description

[Technical field]

[0001] The present invention relates to a device for dispensing flowable and / or pasty compositions, and to the use thereof.

[0002] Devices for depositing flowable and / or pasty compositions are known in principle, as are machines comprising such devices.

[0003] Machines for processing clay for producing models, for example in automotive design development, are known, for example in German utility model no. 29720892 and published patent application no. DE 102016109816 show and describe machines for preparing / heating clay and transporting the flowable / pasty clay in a heated hose to the application site.

[0004] In the machine shown, the clay is heated and conveyed, whereby it is finally conveyed in a heated conveying hose to a feed nozzle, whereby it is extruded from the feed nozzle.

[0005] A drawback of this known configuration is that the clay leaves the feed nozzle in a non-homogeneous / color-separated form, which leads to undesirable quality changes and unacceptable surface phenomena, since the individual components of the pressurized / pumped clay separate over the conveying path, which is often also referred to as particle migration and / or phase separation.

[0006] Furthermore, in the plastics industry, feed nozzles are known that incorporate a mixing insert for mixing two flowable components. This feed device has two feeds for the prepared components that are mixed with each other at the processing site, and the resulting, in particular liquid, mixture crosslinks and hardens in the casting mould. Such an arrangement is known, for example, from WO 2013 / 127534. It can be considered a disadvantage of such known arrangements that these devices are not suitable for processing pasty compositions such as industrial clay, since such compositions cannot be processed at room temperature.

[0007] The object of the present invention is therefore to provide an apparatus for depositing composites which does not have the above-mentioned drawbacks and in particular provides industrial clay of high / homogeneous quality at the processing / depositing site.

[0008] It is a further object of the present invention to provide an apparatus that is configured so that high quality industrial clay can be used in the design process of the automotive industry / vehicle development.

[0009] The problem is solved by the features contained in claims 1, 6 and 7.

[0010] Advantageous configurations and refinements of the solution according to the invention are contained in the further claims.

[0011] Surprisingly, it has been found that a homogeneous mixing of the components of the industrial clay can be ensured at the laying location by a mixing device integrated in the laying device. The mixing device can be configured as a static mixer and / or a dynamic mixer.

[0012] Furthermore, it has proven to be advantageous if a heating device is integrated into the laying device, which ensures an optimal processing temperature for the industrial clay at the laying location.

[0013] In this case the processing / deposition temperature is 60-80° C. Possible heating devices include, for example, electric heating devices, resistive heating devices, belt heating devices, silicone heating cushions and / or heating cartridges.

[0014] In order to better understand the invention, by way of example, a formulation of an industrial clay according to the prior art that can be processed by the laying device according to the invention or by a machine comprising such a device will be described.

[0015] Formulation example - Industrial clay (prior art) 31% by weight Paraffin wax and microcrystalline wax 5% by weight white oil 47% by weight filler 15% by weight lightweight filler 2% by weight pigment

[0016] As can be seen from the examples, the formulations have a liquid / waxy component (oils and waxes) and a solid component (fillers, pigments). In many known clay formulations from the prior art, the proportion of solid components is in the range of 61-70% by weight and the proportion of liquid and / or pasty components is in the range of 30-39% by weight.

[0017] The clay components are homogeneously mixed in the basic state before conveying and without temperature adjustment, however, these components discolor during processing in the laying machine in relation to the pressure applied for conveying and the length of the heated conveying hose, which results in a very noticeable and perceptible waviness / marbling phenomenon due to the discoloration of the components on the surface of the laid clay mass, together with the drawbacks already described.

[0018] The phenomenon of waviness / marbling occurs due to the shear that occurs, especially in the surface and near-surface regions of the clay, because the moved / conveyed clay is slowed down by friction on the inner surface of the conveying hose. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a cross-sectional view showing a strand having a circular cross section emerging from an exit nozzle. [Diagram 2] FIG. 2 is a cross-sectional view of the central axis of the strand. [Diagram 3] 1 is a cross-sectional view showing one embodiment of a serving device according to the present invention. [Figure 4] FIG. 1 shows a plating machine for heating and plating a plastic compound.

[0020] In order to explain the color separation phenomenon, Figs. 1 and 2 are used.

[0021] In figure 1 a cross section of a circular strand emerging from the exit nozzle is shown, whereas in figure 2 a cross section of the central axis of the strand is shown. From these figures the gradual change in the light / black colour of the components can be seen. This shear-based phenomenon increases with the conveying length of the supply hose and with increasing conveying pressure in the supply hose as well as with the applied heating temperature.

[0022] It has proven to be particularly advantageous if the application device comprises a mixing device and a heating element. This combination ensures that the clay at the application point at each time has an optimal temperature and is homogeneously mixed. It also proves that the color expression and structure of the surface of the treated clay is uniform over the entire surface and is formed in a way that is perceptibly of high quality.

[0023] The serving device according to the present invention will be described in detail with reference to Figs.

[0024] 3 shows a cross-sectional view of an embodiment of a deposition device 1 according to the invention, which essentially consists of a housing part 10 and a mixing device 16 integrated / arranged inside the housing part 10. The mixing device 16 is configured in this example as a mixing device with a static mixer.

[0025] The housing part 10 has a material supply / feed area 13 at one end and an exit area 11 at the opposite end, the exit area 13 being formed with means for connection to a heated supply / transport hose (24). The exit area 11 carries an exit nozzle 12, which in this embodiment has an exit nozzle 12 with a gap-like opening, although the exit nozzle 12 may be formed with an opening having a circular cross-section or any other geometric shape.

[0026] Between the feed region 13 and the exit region 11, a so-called mixing region 15 is formed, in which a mixing device 16 is integrated / formed. The mixing device 16 is formed as a static mixer with stationary mixing rods 17, in the present embodiment the mixing region 15 is divided into eight mixing sequences 171, the mixing directions of which are formed in alternating clockwise and counterclockwise directions, whereby an optimal mixing of the pasty and / or flowable materials is ensured by the direction changes.

[0027] In order to ensure that the industrial clay 3 is not completely cooled or cooled in the laying device 1, for example in the mixing area 15 with a large contact area, but is again brought or maintained at the optimum processing temperature, a heating device 18 is formed between the feed area 13 and the exit area 11. The heating device 18 is formed in the present embodiment as an electric resistance heating device. It has proved to be advantageous in this case if the area 181 heated by the heating device 18 at least partially overlaps the mixing area 15.

[0028] The grip area 19 of the serving device is constructed in an insulated manner, so that the user is protected against the heat generated by the heating device 18 .

[0029] As an alternative to the static mixer, a dynamic mixer can be formed with at least one rotating driven mixing shaft. The use of a dynamic mixer can reduce the conveying pressure in the mixing hose, which in turn can reduce the color separation of the components of the conveyed clay.

[0030] The serving device of the present invention as described in claim 1 is used when manufacturing design models in automobile development, and is formed as a part of a serving machine, and is formed as a hand-held guided device.

[0031] Furthermore, the serving device of the present invention as described in claim 1 is used when manufacturing design models in automobile development, and the serving device is formed as part of a serving machine, and the serving machine is formed as a fully automatic serving system.

[0032] A laying machine 2 for heating and laying a plastic compound 3 is shown in Figure 4. The laying machine 2 has at least one heatable transfer station 21 with an inlet opening 25 and a transport unit / transport station 21, and an unloading station 23 for the processable plastic compound 3. A heated transport hose 24 is connected to the unloading station 23, which is connected at its end to the laying device 1 according to the invention.

[0033] The serving machine 2 corresponds in principle to prior art installations that are known, for example from DE Utility Model No. 29720892 and DE 102016109816 A1.

[0034] The dosing device for pasty and / or flowable materials comprises at least a housing with a supply area for the materials and at least one exit area for the materials, at least one mixing area is formed between the supply area for the materials and the exit area for the materials, and the at least one mixing area forms at least one mixing device.

[0035] At least one heating device is formed between the supply region and the exit region, and a heating region is formed by the at least one heating device.

[0036] The at least one mixing device is configured as at least one static mixer and / or at least one dynamic mixer, the at least one static mixer having at least one mixing rod with at least one mixing sequence.

[0037] The heating zone and the mixing zone are present or formed to at least partially overlap each other.

[0038] The above-mentioned application device is used in the manufacture of design models in the development of automobiles, in which the application device is formed as part of a application machine, which is formed as a hand-held guided device, as well as in the manufacture of design models in the development of automobiles, in which the application device is formed as part of a application machine, which is formed as a fully automatic application system. [Explanation of symbols]

[0039] 1 Serving device 10 Housing part 11 Areas of expansion 12 Exit nozzle 13 Supply area 14 Hose connection 15 Mixed area 16 Mixing equipment 17 Mixing shaft / mixing rod 171 Mixed Sequences 18 Heating device 181 Heating area 19 Grip Area / Handling Area 2 Serving machine 21 Transfer Station 23 Unloading Station 24 Conveying hose 25 Injection opening 3. Plastic Composites / Industrial Clay

Claims

1. A laying device connected to an end side of a conveying hose at an outlet of a laying machine for heating and laying industrial clay as a material, The device comprises at least a housing having a feed area for the material and at least one exit area for the material, In the serving device, at least one mixing zone is formed between the supply zone for material and the exit zone for material; The at least one mixing area is formed with at least one mixing device; the at least one mixing device is formed as at least one static mixer, At least one heating device is formed between the supply region and the exit region, and a heating region is formed by the at least one heating device. A serving device characterized by the above.

2. 2. The application device of claim 1, wherein said at least one static mixer comprises at least one mixing rod with at least one mixing sequence.

3. 2. The serving device according to claim 1, wherein the heating area and the mixing area are present or formed to at least partially overlap each other.

4. 2. Use of the application device according to claim 1 for the production of design models in automobile development, comprising: The serving device is formed as a part of a serving machine, The serving device is formed as a handheld guided device, use.

5. 2. Use of the application device according to claim 1 for the production of design models in automobile development, comprising: The serving device is formed as a part of a serving machine, The serving machine is formed as a fully automatic serving system. use.

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