Vacuum defoaming device for producing and processing heat-conducting silica gel gasket

Abstract

The utility model relates to a vacuum defoaming device for producing and processing a heat-conducting silica gel gasket. The vacuum defoaming device comprises a vacuum machine and a vacuum barrel for containing liquid to be defoamed, the top of the vacuum barrel is provided with an opening and a sealing cover for sealing and covering the opening, and the bottom of the vacuum barrel is rotationally connected with a stirring device; a sliding rail is arranged on the sealing cover in the length direction of the center line of the sealing cover, a scraping plate is connected to the sliding rail in a sliding mode, and the outer surface of the scraping plate is evenly covered with a plurality of spines arranged in the radial direction. The sealing cover is further provided with a lead screw module used for driving the scraper to do reciprocating motion along the sliding rail. The lead screw module comprises a lead screw rotationally connected to the sealing cover, a sliding seat and a driving motor for driving the lead screw to rotate; the scraping plate is hung on the upper portion of the vacuum barrel, one end of the scraping plate is a sliding connection end which is fixedly connected with the sliding seat, and the other end of the scraping plate is a free end which extends into the liquid level. The device is simple in structure, assists the vacuum barrel in breaking bubbles on the surface of liquid, and improves the defoaming efficiency of the vacuum defoaming device.

Description

Technical Field

[0001] This utility model relates to a vacuum degassing device, and more particularly to a vacuum degassing device for the production and processing of thermally conductive silicone pads. Background Technology

[0002] Thermally conductive silicone pads, also known as thermally conductive silicone sheets or thermally conductive silicone mats, are double-sided adhesive tapes with a high viscosity PET substrate. In the current technology, before thermally conductive silicone pads are cured, they are liquid or semi-solid materials with a viscosity ranging from mud-like to paste-like. The viscosity is very high, and obvious air bubbles will appear during the calendering process. Therefore, it is necessary to degas the thermally conductive silicone pad material in a vacuum environment first.

[0003] However, for slurries with high viscosity, a large amount of foam will be generated on the liquid surface when the internal air bubbles are expelled. It takes a long time for the foam to break and release air, resulting in low defoaming efficiency.

[0004] Therefore, there is an urgent need for a vacuum degassing device for the production and processing of thermally conductive silicone pads to solve the above problems. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0006] The specific solution is as follows: A vacuum degassing device for the production and processing of thermally conductive silicone pads includes a vacuum machine and a vacuum tank for holding the liquid to be degassed, wherein the vacuum machine and the vacuum tank are connected by a gas pipe; the top of the vacuum tank is provided with an opening and a sealing cap to close the opening, and a stirring device is rotatably connected to its bottom, wherein:

[0007] The sealing cover is provided with a slide rail along its center line, and a scraper is slidably connected to the slide rail. The outer surface of the scraper is uniformly covered with a plurality of radially arranged spikes.

[0008] The sealing cover is also provided with a lead screw module for driving the scraper to reciprocate along the slide rail; the lead screw module includes a lead screw rotatably connected to the sealing cover, a sliding seat slidably connected to the lead screw, and a drive motor for driving the lead screw to rotate.

[0009] The scraper is suspended above the vacuum tank. One end of the scraper is a sliding connection end, which is fixedly connected to the sliding seat. The other end is a free end, which extends into the liquid surface.

[0010] Furthermore, the main shaft of the stirring device extends upward to the middle of the vacuum tank; multiple stirring blades are installed on the main shaft, and the multiple stirring blades are evenly distributed along the outer surface of the main shaft, and the stirring blades are designed to be inclined.

[0011] Furthermore, the sliding seat is also provided with a drive mechanism for driving the scraper to move up or down, and the drive mechanism is a telescopic cylinder.

[0012] Furthermore, the sealing cap is equipped with a liquid level sensor for sensing the liquid level.

[0013] Furthermore, the sealing cover is also equipped with a pressure gauge for monitoring the internal pressure of the vacuum chamber.

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

[0015] This application adds a scraper inside the vacuum tank, with one end of the scraper extending below the liquid surface. By controlling the scraper to move left and right inside the tank, the sharp points on the scraper surface come into contact with and puncture the bubbles, thus assisting in the vacuum breaking of bubbles on the liquid surface and improving the degassing efficiency of the vacuum degassing device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a vacuum degassing device for the production and processing of thermally conductive silicone pads according to this utility model;

[0018] Figure 2 This is a cross-sectional view of a vacuum degassing device for the production and processing of thermally conductive silicone pads according to this utility model;

[0019] Figure 3 This is a schematic diagram showing the positional relationship between the scraper, slide rail, and lead screw module in a vacuum degassing device for the production and processing of thermally conductive silicone pads according to this utility model. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Please see Figure 1 and combined Figure 2 and Figure 3As shown in the figure, this utility model embodiment discloses a vacuum degassing device for the production and processing of thermally conductive silicone pads. The device includes a vacuum machine 2 and a vacuum tank 1 for holding the liquid to be degassed. The vacuum machine 2 and the vacuum tank 1 are connected via an air pipe. The top of the vacuum tank 1 has an opening and a sealing cap 3 that closes the opening. A stirring device 11 is rotatably connected to its bottom. More specifically:

[0022] A slide rail 34 is provided along its center line on the sealing cover 3. A scraper 6 is slidably connected on the slide rail 34. The outer surface of the scraper 6 is evenly covered with multiple radially arranged spikes.

[0023] The sealing cover 3 is also provided with a lead screw module 30 for driving the scraper 6 to reciprocate along the slide rail 34; the lead screw module 30 includes a lead screw 32 rotatably connected to the sealing cover 3, a sliding seat 33 slidably connected to the lead screw 32, and a drive motor 31 for driving the lead screw 32 to rotate.

[0024] The scraper 6 is suspended above the vacuum tank 1. One end of the scraper is a sliding connection end 62, which is fixedly connected to the sliding seat 33. The other end is a free end 63, which extends into the liquid surface.

[0025] Specifically, the main shaft 111 of the stirring device 11 extends upward to the middle of the vacuum tank 1; multiple stirring blades 112 are installed on the main shaft 111, and the multiple stirring blades 112 are evenly distributed along the outer surface of the main shaft 111, and the stirring blades 112 are designed to be inclined.

[0026] Specifically, the sliding seat 33 is also equipped with a drive mechanism 7 for driving the scraper 6 to move up or down. The drive mechanism 7 is a telescopic cylinder. This allows the operator to easily adjust the height of the scraper and ensures the stability of the scraper 6 during operation.

[0027] Specifically, the sealing cap 3 is equipped with a liquid level sensor 5 for sensing the liquid level. Therefore, the liquid level sensor 5 allows operators to easily monitor the liquid level in the container and adjust the height of the scraper.

[0028] Specifically, the sealing cap 3 is also equipped with a pressure gauge 4 for monitoring the internal pressure of the vacuum tank 1.

[0029] In summary, the main function of the stirring device 11 in this application is to increase the contact area between the gas and the liquid by stirring, making it easier for bubbles to separate from the liquid and rise to the surface, thereby promoting the discharge of bubbles.

[0030] By adding a scraper 6 inside the vacuum tank 1, with one end of the scraper 6 extending below the liquid surface, and then controlling the scraper 6 to move left and right inside the tank so that the sharp points on the surface of the scraper 6 come into contact with and puncture the bubbles, the effect of breaking up the bubbles on the liquid surface is enhanced, which helps to improve the degassing efficiency of the vacuum degassing device.

[0031] Furthermore, the scraper 6 of this application has a simple structure, low manufacturing cost, and strong practicality, making it easy to promote and use.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A vacuum degassing device for the production and processing of thermally conductive silicone pads, comprising a vacuum machine and a vacuum tank for holding the liquid to be degassed, wherein the vacuum machine and the vacuum tank are connected via an air pipe; the top of the vacuum tank is provided with an opening and a sealing cap for sealing the opening, and a stirring device is rotatably connected to its bottom, characterized in that: The sealing cover is provided with a slide rail along its center line, and a scraper is slidably connected to the slide rail. The outer surface of the scraper is evenly covered with a plurality of radially arranged spikes. The sealing cover is also provided with a lead screw module for driving the scraper to reciprocate along the slide rail; the lead screw module includes a lead screw rotatably connected to the sealing cover, a sliding seat slidably connected to the lead screw, and a drive motor for driving the lead screw to rotate. The scraper is suspended above the vacuum tank. One end of the scraper is a sliding connection end, which is fixedly connected to the sliding seat. The other end is a free end, which extends into the liquid surface.

2. The vacuum degassing device for producing and processing thermally conductive silicone pads according to claim 1, characterized in that, The main shaft of the stirring device extends upward to the middle of the vacuum tank; multiple stirring blades are installed on the main shaft, and the multiple stirring blades are evenly distributed along the outer surface of the main shaft, and the stirring blades are designed to be inclined.

3. The vacuum degassing device for producing and processing thermally conductive silicone pads according to claim 1, characterized in that, The sliding seat is also provided with a drive mechanism for driving the scraper to move up or down, and the drive mechanism is a telescopic cylinder.

4. The vacuum degassing device for producing and processing thermally conductive silicone pads according to claim 1, characterized in that, The sealing cap is equipped with a liquid level sensor for sensing the liquid level.

5. The vacuum degassing device for producing and processing thermally conductive silicone pads according to claim 1, characterized in that, The sealing cap is also equipped with a pressure gauge for monitoring the internal pressure of the vacuum chamber.

Images