Vacuum mixing device for mixing silicone rubber production

Abstract

The utility model discloses a vacuum mixing device for mixing silicone rubber production, which comprises a shell, the shell is of a double-layer structure, and a cavity is formed between the double-layer structure; the device further comprises a temperature control assembly and an outlet heat preservation structure. The temperature control assembly comprises a cooler, a leading-in pipe and a leading-out pipe which are arranged on the shell, the leading-out pipe extends out of the shell and is provided with an air compressor, and a transmission pipe is connected between the output end of the air compressor and the cooler; the outlet heat preservation structure comprises an outlet channel, and the outlet channel comprises a heat preservation layer, a heating layer and a lining layer from outside to inside. High-pressure circulation can be formed, and the circulation cooling effect is good; and the temperature difference between the outlet channel and the interior of the shell is reduced, and the product quality is prevented from being affected by large temperature difference when materials are guided out.

Description

Technical Field

[0001] This utility model relates to the field of silicone rubber processing technology, specifically to a vacuum mixing device for the production of mixed silicone rubber. Background Technology

[0002] Silicone rubber is a high-molecular-weight organosilicon compound copolymerized from siloxanes and other organosilicon monomers. Silicone rubber has good resistance to high and low temperatures, chemical corrosion, electrical insulation, weather resistance, physiological inertness, air permeability, and good processing performance. It is widely used in the medical, electronics, aerospace, automotive, and construction industries.

[0003] Vacuum mixing is an important process in silicone rubber processing. It is a process of mixing and refining materials in a vacuum environment. Different materials are mixed evenly through mechanical force. By drawing a vacuum, air, moisture and other volatile substances in the materials can be removed, reducing defects such as bubbles and pores generated during the mixing process, thereby improving the quality and performance of the product.

[0004] During vacuum mixing, a large amount of heat is generated due to mechanical action and intermolecular friction. If the internal temperature of the shell is too high, the silicone rubber molecular chains may undergo excessive breakage and cross-linking reactions, leading to changes in molecular weight distribution and affecting the mechanical properties, tensile strength, and elasticity of the silicone rubber. In existing technologies, water cooling circulation is a commonly used cooling method. However, water cooling circulation requires large equipment such as cooling towers, resulting in high costs and the risk of media leakage damaging equipment and materials, thus presenting limitations. Furthermore, in the discharge structure, the long discharge channel and lack of insulation make it difficult to maintain the optimal mixing temperature, causing the material to experience a rapid temperature drop during discharge, affecting the quality of the finished product. Utility Model Content

[0005] This invention aims to solve the aforementioned technical problem of limitations in temperature control during mixing, and provides a vacuum mixing device for the production of silicone rubber.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a vacuum mixing device for the production of silicone rubber, comprising a shell, a vacuum machine connected to one side of the shell; a drive motor is provided at the end of the shell away from the vacuum machine, and a shearing assembly is provided at the output end of the drive motor extending into the shell; the shell has a double-layer structure, with a cavity formed between the two layers; and further comprising:

[0007] Temperature control assembly; including a cooler mounted on a housing, the output end of which is connected to an inlet pipe extending into a cavity; an outlet pipe is mounted on the housing at one end away from the inlet pipe, an air compressor is mounted on the outlet pipe extending out of the housing, and a transmission pipe is connected between the output end of the air compressor and the cooler;

[0008] An outlet insulation structure includes an outlet channel, wherein the outlet channel comprises an insulation layer, a heating layer, and an inner lining layer from the outside to the inside.

[0009] Furthermore, the shearing assembly includes two sets of shearing blades, with a fixing strip connecting each end of the shearing blades, and a support rod connecting the fixing strips; one of the fixing strips is connected to the output end of the drive motor.

[0010] Furthermore, the shearing blades are oriented differently; each shearing blade is welded together from multiple C-shaped metal parts, with adjacent metal parts oriented in opposite directions.

[0011] Furthermore, a pump is provided on the outlet pipe.

[0012] Furthermore, a heating wire is wound inside the heating layer; the inner lining layer is made of graphite material.

[0013] Furthermore, a control board is provided on the outside of the housing, and the control board is electrically connected to the drive motor, cooler, and air compressor via wires.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] Forced air cooling eliminates concerns about leakage of cooling medium causing damage to equipment and materials, and it can form a high-pressure circulation, resulting in good cooling effect.

[0016] Adding an insulation structure at the outlet channel reduces the temperature difference between the outlet channel and the inside of the shell, preventing the material from experiencing a large temperature difference during discharge, which could affect product quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the shearing blade structure of this utility model.

[0019] Figure 3 This is a cross-sectional view of the outlet channel of this utility model.

[0020] As shown in the figure: 1. Shell, 2. Vacuum machine, 3. Drive motor, 4. Shearing blade, 5. Fixing strip, 6. Support rod, 7. Cavity, 8. Cooler, 9. Inlet pipe, 10. Outlet pipe, 11. Air compressor, 12. Transmission pipe, 13. Outlet channel, 14. Insulation layer, 15. Heating layer, 16. Inner lining layer, 17. Heating wire, 18. Control board. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] Example 1, in conjunction with Appendix Figure 1 A vacuum mixing apparatus for producing compounded silicone rubber includes a shell 1, with a vacuum machine 2 connected to one side of the shell 1; the vacuum machine 2 is used to evacuate the inside of the shell 1, so that the raw materials are mixed in a vacuum environment, reducing moisture and impurities.

[0023] Combined with appendix Figure 1 , 2 A drive motor 3 is located at the end of the housing 1 away from the vacuum machine 2. The output end of the drive motor 3 extends into the housing 1 and is equipped with a shearing assembly. The shearing assembly includes two sets of shearing blades 4. A fixing strip 5 is connected between the two ends of the shearing blades 4, and a support rod 6 is connected between the fixing strips 5. One of the fixing strips 5 is connected to the output end of the drive motor 3. The shearing blades 4 are in different directions. Each shearing blade 4 is welded from multiple C-shaped metal parts, and adjacent metal parts are in opposite directions. The above structure can improve the frictional shearing force of the shearing blades 4, increase the contact frequency with the raw materials, improve the uniformity of shearing and kneading, and ensure the quality of the finished product.

[0024] Combined with appendix Figure 1 The shell 1 has a double-layer structure, with a cavity 7 formed between the two layers; the cavity 7 is used to cool the internal components of the shell 1 without disrupting the vacuum environment;

[0025] Combined with appendix Figure 1 , 2 The temperature control component includes a cooler 8 mounted on the housing 1, with the output end of the cooler 8 connected to an inlet pipe 9 extending into the cavity 7; an outlet pipe 10 is mounted on the housing 1 at the end furthest from the inlet pipe 9, with a pump mounted on the outlet pipe 10, and an air compressor 11 extending out of the housing 1 from the outlet pipe 10; a transmission pipe 12 is connected between the output end of the air compressor 11 and the cooler 8. In the above structure, gas enters the cavity 7 from the inlet pipe 9 and exchanges heat with the high-temperature environment inside. The high-temperature gas after heat exchange enters the air compressor 11 from the outlet pipe 10 and is exported as high-temperature and high-pressure gas. After being cooled by the cooler 8, it re-enters the cavity 7 through the inlet pipe 9 for heat exchange, achieving cyclic cooling and keeping the internal temperature below 120 degrees Celsius during operation to avoid scorching of the silicone rubber.

[0026] As an auxiliary component, a control board 18 is provided on the outside of the housing 1. The control board 18 is electrically connected to the drive motor 3, cooler 8 and air compressor 11 via wires to control start-up, shutdown and adjustment.

[0027] Combined with appendix Figure 1 , 3 It also includes an outlet insulation structure; including an outlet channel 13, the outlet channel 13 includes an insulation layer 14, a heating layer 15, and an inner lining layer 16 from the outside to the inside; a heating wire 17 is wound inside the heating layer 15; the inner lining layer 16 is made of graphite material, which has excellent thermal conductivity, stable structure, and corrosion resistance; the heating wire 17 is used to heat the outlet channel 13 to keep its temperature above 60 degrees Celsius, reduce the temperature difference with the inside of the shell 1, and avoid affecting the structure and performance of the finished product when it is discharged.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A vacuum mixing apparatus for producing compounded silicone rubber, comprising a housing (1), wherein a vacuum machine (2) is connected to one side of the housing (1); characterized in that: The housing (1) has a drive motor (3) at the end away from the vacuum machine (2), and the output end of the drive motor (3) extends into the housing (1) and is provided with a shearing assembly; the housing (1) has a double-layer structure, and a cavity (7) is formed between the double layers; it also includes: Temperature control assembly; including a cooler (8) provided on the housing (1), the output end of the cooler (8) being connected to an inlet pipe (9) extending into the cavity (7); an outlet pipe (10) is provided on the housing (1) at one end away from the inlet pipe (9), an air compressor (11) is provided on the outlet pipe (10) extending out of the housing (1), and a transmission pipe (12) is provided between the output end of the air compressor (11) and the cooler (8); The outlet insulation structure includes an outlet channel (13), which includes an insulation layer (14), a heating layer (15), and an inner lining layer (16) from the outside to the inside.

2. The vacuum mixing device for mixing and producing silicone rubber according to claim 1, characterized in that: The shearing assembly includes two sets of shearing blades (4), with fixing strips (5) connected between the two ends of each shearing blade (4), and support rods (6) connected between the fixing strips (5); one of the fixing strips (5) is connected to the output end of the drive motor (3).

3. The vacuum mixing device for mixing and producing silicone rubber according to claim 2, characterized in that: The shearing blades (4) have different directions; each shearing blade (4) is welded together from multiple C-shaped metal parts, and adjacent metal parts are in opposite directions.

4. The vacuum mixing device for mixing and producing silicone rubber according to claim 1, characterized in that: A pump is provided on the outlet pipe (10).

5. The vacuum mixing device for mixing and producing silicone rubber according to claim 1, characterized in that: The heating layer (15) is wrapped with a heating wire (17); the inner lining layer (16) is made of graphite material.

6. The vacuum mixing device for mixing and producing silicone rubber according to claim 1, characterized in that: The outer side of the housing (1) is provided with a control board (18), which is electrically connected to the drive motor (3), cooler (8) and air compressor (11) via wires.

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