Continuous processing device for silicone rubber coated fabric

Abstract

The utility model provides a continuous processing device for silicone rubber coated fabric, which comprises a feeding part, the feeding part is sequentially provided with a fabric roller, a paper feeding shaft and a film feeding shaft along the direction from an inlet to an outlet, and a coating component is arranged between the fabric roller and the paper feeding shaft; the inlet end of the pressing part is connected with the outlet end of the feeding part; and the inlet end of the winding part is connected with the outlet end of the pressing part, and a heating assembly is arranged between the pressing part and the winding part. The utility model has the beneficial effect that the technical problems of multiple holes, non-uniform thickness and low production efficiency of the existing silicone rubber coated fabric are solved.

Description

Technical Field

[0001] This utility model belongs to the field of silicone rubber coating, and in particular relates to a continuous processing device for silicone rubber coated fabrics. Background Technology

[0002] With the rapid development of science and technology, human exploration of space has gradually expanded into the commercial sector. Commercial spaceflight, as an emerging form of space activity, is increasingly becoming a significant force driving global competition in space technology and industrial development. How to stand out in this competition and development, leverage cutting-edge technologies, solve current bottlenecks while reducing costs and improving service efficiency, has become a primary concern.

[0003] As a commonly used thermal protection structure on the bottom of aerospace vehicles, the thermal skirt places higher demands on materials and manufacturing processes. The main material of the thermal skirt is silicone rubber-coated fabric, which is composed of a reinforcement and silicone rubber composite. The high heat flux environment during rocket operation requires that the thermal protection matrix material and the reinforcement be free of pores and have uniform thickness during the coating process; the impact environment requires that the reinforcement and matrix have stable mechanical properties after molding.

[0004] Currently, heat-resistant fabric skirts are mostly prepared using manual brushing and spraying methods to produce silicone rubber-coated fabrics. These methods frequently result in uneven thickness and porosity. These problems lead to poor heat resistance in the silicone rubber-coated fabrics, making them prone to heat leakage during use; simultaneously, their mechanical properties deteriorate. Furthermore, curing the sprayed or pre-coated silicone rubber fabric in heating equipment is limited by mold or heating equipment size, hindering large-scale, rapid production and resulting in higher production costs and poor product performance stability. Utility Model Content

[0005] In view of this, the present invention aims to provide a continuous processing device for silicone rubber coated fabrics, in order to solve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A continuous processing apparatus for silicone rubber coated fabrics, comprising:

[0008] The feeding section is provided with a textile roller, a paper feeding shaft, and a film feeding shaft arranged sequentially from the inlet to the outlet. A coating assembly is provided between the textile roller and the paper feeding shaft.

[0009] A pressing section, wherein the inlet end of the pressing section is connected to the outlet end of the feeding section;

[0010] The winding section has its inlet end connected to the outlet end of the pressing section, and a heating component is provided between the pressing section and the winding section.

[0011] Furthermore, the coating assembly and the film feeding shaft are located on the same side of the textile roller, while the paper feeding shaft is located on the other side of the textile roller.

[0012] Furthermore, the coating assembly is used to coat silicone rubber onto the surface of a textile, which is introduced through a textile roller. The coating assembly includes a stirring and defoaming vessel, a buffer vessel, and an adjustable discharge port.

[0013] The outlet of the adjustable discharge port is adjacent to the textile, and the inlet is connected to the outlet of the buffer tank; the inlet of the buffer tank is connected to the outlet of the stirring and defoaming tank.

[0014] Furthermore, a pair of blades are provided inside the stirring and defoaming vessel.

[0015] Furthermore, the stirring defoaming vessel and the buffer vessel are connected by a ball valve, and the buffer vessel is connected to the adjustable discharge port by a ball valve.

[0016] Furthermore, a vacuum port is provided at the connection between the stirring defoaming vessel and the buffer vessel, and the vacuum port is connected to an external device for vacuuming.

[0017] Furthermore, the film feeding shaft is used to feed the film into the pressing section, and the output end of the film feeding shaft is provided with a functional material spraying assembly, which is used to spray solvent onto the end face of the film near the textile roller.

[0018] Furthermore, the film is any one of PE, PP, or PET.

[0019] Furthermore, the solvent is any one of acetone, ethanol, or water.

[0020] Furthermore, the paper feeding shaft is used to feed the release paper into the pressing section, and the release paper is any one of CCK release paper, kaolin release paper, and glassine release paper.

[0021] Compared with the prior art, the continuous processing device for silicone rubber coated fabrics described in this utility model has the following advantages:

[0022] The gas in the silicone rubber is removed by stirring and venting the autoclave. The silicone rubber is then coated onto the textile through an adjustable discharge port. Under the action of the pressing section, the silicone rubber is pressed onto the fabric. Under the action of the heating component, the silicone rubber is cured. Finally, it is wound up in the winding area. This method solves the technical problems of existing silicone rubber coated fabrics, such as porosity, uneven thickness, and low production efficiency. Attached Figure Description

[0023] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the continuous processing device for silicone rubber coated fabrics according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Feeding section; 101. Textile roller; 102. Paper feed shaft; 103. Film feed shaft; 2. Coating assembly; 201. Stirring and defoaming kettle; 202. Buffer kettle; 203. Adjustable discharge port; 3. Functional material spraying assembly; 4. Pressing section; 5. Heating assembly; 6. Winding section. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] A continuous processing apparatus for silicone rubber coated fabrics, comprising:

[0032] The feeding section is provided with a textile roller, a paper feeding shaft, and a film feeding shaft arranged sequentially from the inlet to the outlet. A coating assembly is provided between the textile roller and the paper feeding shaft.

[0033] A pressing section, wherein the inlet end of the pressing section is connected to the outlet end of the feeding section;

[0034] The winding section has its inlet end connected to the outlet end of the pressing section, and a heating component is provided between the pressing section and the winding section.

[0035] The coating assembly and the film feeding shaft are located on the same side of the textile roller, and the paper feeding shaft is located on the other side of the textile roller.

[0036] The coating assembly is used to coat silicone rubber onto the surface of a textile, which is introduced through a textile roller. The coating assembly includes a stirring and defoaming vessel, a buffer vessel, and an adjustable discharge port.

[0037] The outlet of the adjustable discharge port is adjacent to the textile, and the inlet is connected to the outlet of the buffer tank; the inlet of the buffer tank is connected to the outlet of the stirring and defoaming tank.

[0038] In some embodiments, the effective volume of the stirring defoaming vessel : the effective volume of the buffer vessel = (1.05~1.20) : 1;

[0039] The adjustable discharge port (4) is a rectangular outlet, and the size of the discharge port is adjustable;

[0040] The length of the discharge port is equal to the length of the coated fabric (0.60–1.00):1.

[0041] Outlet thickness: Coated fabric thickness = (1.00~2.0):1;

[0042] The cross-sectional area of ​​the discharge port is equal to the interface thickness of the silicone rubber coated fabric (1.05~1.20).

[0043] The stirring and defoaming vessel is equipped with a pair of blades.

[0044] The stirring defoaming vessel and the buffer vessel are connected by a ball valve, and the buffer vessel is connected to the adjustable discharge port by a ball valve.

[0045] A vacuum port is provided at the connection between the stirring defoaming vessel and the buffer vessel, and the vacuum port is connected to an external device for vacuuming.

[0046] The working process of the coating component is as follows:

[0047] Add silicone rubber to the stirring defoaming kettle and start stirring at a speed of 2-15 r / min for 15-30 min. Evacuate the kettle until the pressure is ≤-0.095 MPa to remove bubbles. After defoaming, inject air.

[0048] Vacuum the buffer vessel, open the ball valve between the stirring and defoaming vessel and the buffer vessel, and slowly inject the silicone rubber into the buffer vessel under the influence of negative pressure.

[0049] After the silicone rubber is injected into the buffer tank, nitrogen gas is injected into the stirring and defoaming tank. Under the pressure of the nitrogen gas, the silicone rubber is squeezed into the adjustable discharge port and evenly coated onto the fabric.

[0050] The film feeding shaft is used to feed the film into the pressing section. The output end of the film feeding shaft is provided with a functional material spraying assembly, which is used to spray solvent onto the end face of the film near the textile roller.

[0051] The pressing section consists of two sets of Φ310mm heatable iron rods, which can be heated to 120℃, and the gap can be adjusted according to the product thickness.

[0052] The heating component is divided into three heating zones, each with a length of 0.5 to 0.7 m. Different heating steps are set according to the reaction characteristics of silicone rubber. The fabric is passed through the heating zone at a speed of 1 to 5 m / min, and the heating temperature is generally 30 to 80°C.

[0053] The film is made of any one of PE, PP, or PET.

[0054] The solvent is any one of acetone, ethanol, or water.

[0055] The paper feeding shaft is used to feed the release paper into the pressing section, and the release paper is any one of CCK release paper, kaolin release paper, and glassine release paper.

[0056] In this embodiment, the gas in the silicone rubber is removed by stirring and venting the vessel, and the silicone rubber is coated onto the fabric through the discharge port. The silicone rubber is uniformly coated onto the fabric and then cured, which solves the technical problems of existing silicone rubber coated fabrics, such as porosity, uneven thickness, and low production efficiency.

[0057] In some embodiments, one working step of the above-described continuous processing apparatus for silicone rubber coated fabrics is as follows:

[0058] 1) Add 3000g of silicone rubber to a 5L stirring defoaming kettle, heat to 30℃, stir at 5r / min for 30min, and evacuate to a vacuum of ≤-0.095MPa; after the venting is complete, open the valve to inject air until the vacuum is 0.00MPa.

[0059] 2) After evacuating the buffer vessel to -0.095MPa, open the ball valve between the stirring and defoaming vessel and the buffer vessel, and slowly inject the silicone rubber into the buffer vessel;

[0060] 3) After the silicone rubber is injected into the buffer tank, nitrogen gas is injected into the stirring and defoaming tank. Under pressure, the silicone rubber is squeezed into the adjustable discharge port to a length of 60cm and a thickness of 0.30mm.

[0061] 4) Pass the fabric through the heating assembly at a speed of 2 m / min, with the heating temperature typically at 50℃;

[0062] 5) After the silicone rubber has cured, the silicone rubber-coated fabric is wound up in the winding area.

[0063] Tests showed that the silicone rubber-coated fabric had no internal pores, a thickness of 0.28–0.30 mm, and a uniform color.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuous process for coating a fabric with silicone rubber, characterized in that, The application relates to a textile material coating device. The device comprises a feeding part, a pressing part and a winding part. The feeding part is sequentially provided with a textile roller, a paper feeding shaft and a film feeding shaft along an inlet-to-outlet direction. The textile roller and the paper feeding shaft are provided with a coating assembly.

2. A continuous process for coating fabric with silicone rubber as claimed in claim 1 wherein, The inlet end of the pressing part is connected with the outlet end of the feeding part.

3. A continuous process for coating fabric with silicone rubber as claimed in claim 1 wherein, The outlet end of the pressing part is connected with the inlet end of the winding part. The heating assembly is arranged between the pressing part and the winding part.

4. A continuous process for coating fabric with silicone rubber as claimed in claim 3 wherein, The coating assembly and the film feeding shaft are located on the same side of the textile roller.

5. A continuous process for coating fabric with silicone rubber as claimed in claim 3 wherein, The paper feeding shaft is located on the other side of the textile roller.

6. A continuous process for coating fabric with silicone rubber as claimed in claim 3 wherein, The coating assembly is used for coating silicone rubber on the surface of the textile material.

7. A continuous process for coating fabric with silicone rubber as claimed in claim 1 wherein, The textile material is introduced through the textile roller.

8. A continuous process for coating fabric with silicone rubber as claimed in claim 7 wherein, The coating assembly comprises a stirring bubble-removing kettle, a buffer kettle and an adjustable outlet.

9. A continuous process for coating fabric with silicone rubber as claimed in claim 7 wherein, The outlet of the adjustable outlet is close to the textile material.

10. A continuous process for coating fabric with silicone rubber as claimed in claim 1 wherein, The inlet of the buffer kettle is communicated with the outlet of the stirring bubble-removing kettle. A pair of paddles are arranged in the stirring bubble-removing kettle. The stirring bubble-removing kettle and the buffer kettle are connected through a spherical valve. The buffer kettle and the adjustable outlet are connected through a spherical valve. A vacuum suction port is arranged at the connection position of the stirring bubble-removing kettle and the buffer kettle. The vacuum suction port is communicated with an external vacuum suction device. The film feeding shaft is used for feeding the film into the pressing part. The output end of the film feeding shaft is provided with a functional material spraying assembly. The functional material spraying assembly is used for spraying solvent on the end face of the film close to the textile roller. The film is made of any one of PE, PP and PET. The solvent is any one of acetone, ethanol and water. The paper feeding shaft is used for feeding release paper into the pressing part. The release paper is any one of CCK release paper, kaolin release paper and glassine release paper.

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