Automatic coating device applied to surface coating of hard carbon fiber thermal insulation material

Abstract

The utility model is suitable for the technical field of thermal insulation material production, and provides an automatic coating device applied to a hard carbon fiber thermal insulation material surface coating, which comprises a coating platform, a brush roller is installed on the mechanical arm and comprises a rotating shaft, the mechanical arm is further provided with a rotating motor used for driving the rotating shaft to rotate, the rotating shaft is sleeved with a brush, a storage cavity is formed between the rotating shaft and the brush, and a plurality of small holes are formed in the side wall of the storage cavity. A feeding hole is formed in the center of the brush roller, and the feeding hole is connected with a feeding device; and the pressure applying scraping plate is also mounted on the mechanical arm. According to the device, the mode that the feeding device is matched with the mechanical arm is adopted, automatic coating slurry coating can be achieved, the coated coating is smoother compared with manual operation, the consistency of products is better, the thickness is controllable, the cost is saved, and meanwhile the defective rate is obviously reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat-insulating material production, and in particular relates to an automatic coating device applied to the surface coating of a hard carbon fiber heat-insulating material. Background Art

[0002] In recent years, the country has vigorously developed clean energy, and the industrial scale of the solar photovoltaic industry has expanded dramatically. Improving quality and reducing costs have become the key to industrial development. Moreover, with the comprehensive development of the semiconductor industry, the heating furnace for preparing various single crystal materials has extremely high impurity content. This puts forward a variety of performance requirements for the thermal insulation materials used in the single crystal furnace. Under the premise of ensuring thermal insulation performance, the thermal insulation materials must be durable and have a relatively long life. At the same time, during use, the carbon fiber cannot be de-powdered under high temperature and argon flushing, and carbon impurities cannot be introduced into the prepared single crystal materials. The main thermal insulation materials in the single crystal furnace, whether carbon fiber soft felt or carbon fiber hard felt, are consumable parts and account for a high proportion of the manufacturing cost of single crystal silicon. Therefore, it is urgently required to extend the service life of graphite thermal field materials (various thermal insulation materials and components). Enterprises using soft felt regularly move the thermal insulation felt close to the inner layer of the thermal field to the outer layer, replacing the old with the new, so as to save costs, but the consumption is still very large, and all soft felts need to be replaced every 6-8 months. Carbon fiber hard felt itself has a longer lifespan than soft felt and has certain advantages. If the corrosion resistance is improved through coating, the service life of the insulation material will be extended to 1-2 years, greatly saving the cost of single crystal preparation.

[0003] The existing protective coatings, whether carbon composite coatings or silicon carbide composite coatings, have a very high initial coating slurry viscosity, which is not suitable for spraying. Even if the slurry is diluted and sprayed, the production efficiency will be reduced and the energy consumption will increase. Insulation hard felt is a porous material. Due to its large specific surface area, it cannot be dipped. This will cause the material to absorb a large amount of solvent and glue, making it difficult to dry and reducing the porosity, resulting in a decrease in thermal insulation performance. The best way is to brush it.

[0004] However, due to the complex structure and rough surface structure of hard carbon felt, the existing coating is done manually. Moreover, since the coating needs to be repeatedly processed by brushing, drying and carbonization, the large amount of manual participation will inevitably affect the consistency of the coating, and the manual efficiency is too low, making the coating stage a bottleneck process in the production process of hard carbon felt, which seriously slows down the production process. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide an automatic coating device for the surface coating of a hard carbon fiber thermal insulation material, aiming to solve the problems raised in the above-mentioned background technology.

[0006] The utility model is implemented as follows: an automatic coating device for the surface coating of a hard carbon fiber thermal insulation material, comprising a coating platform for placing a sample to be coated, and a plurality of limit clamps for fixing the sample to be coated are arranged in a circle on the coating platform, and a slideway matching the limit clamp is also arranged on the coating platform; and further comprising:

[0007] A mechanical arm, wherein the mechanical arm is installed on one side of the coating platform;

[0008] A brush roller, the brush roller is mounted on a mechanical arm, the brush roller comprises a rotating shaft and a brush, the mechanical arm is also provided with a rotating motor for driving the rotating shaft to rotate, the brush sleeve is arranged on the rotating shaft, and a storage cavity is arranged between the rotating shaft and the brush, a plurality of small holes are arranged on the side wall of the storage cavity, a feeding hole is arranged at the center of the brush roller, and the feeding hole is connected to a feeding device, and the feeding device is used to transport the coating slurry into the storage cavity;

[0009] A pressure scraper is also installed on the mechanical arm, and the pressure scraper is installed on one side of the brush roller.

[0010] According to a further technical solution, the surface of the coating platform is coated with polytetrafluoroethylene, which facilitates the cleaning and collection of the coating slurry flowing down.

[0011] According to a further technical solution, the limit clamp is made of stainless steel and has a polyfluoride coating thereon.

[0012] According to a further technical solution, the feeding device comprises a storage tank for containing the coating slurry, the storage tank is connected to the feed hole on the brush roller via a feed pipeline, and a feed pump is also provided on the feed pipeline.

[0013] According to a further technical solution, the storage tank is provided with a stirring paddle, and the rotation speed of the stirring paddle is 20 revolutions per minute.

[0014] According to a further technical solution, the brush uses high-density hard short fibers with a fiber length of 5-15 mm.

[0015] The embodiment of the utility model provides an automatic coating device for the surface coating of hard carbon fiber thermal insulation materials. The device can realize automatic coating by cooperating with a feeding device and a robotic arm. The coating after coating is smoother than that by manual operation, the product consistency is better, the thickness is controllable, and the cost is saved while the defective rate is significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of an automatic coating device for the surface coating of a hard carbon fiber thermal insulation material provided in an embodiment of the utility model;

[0017] Figure 2 A top view of a brush roller in an automatic coating device for a surface coating of a hard carbon fiber thermal insulation material provided in an embodiment of the utility model;

[0018] Figure 3 A top view of a coating platform in an automatic coating device for surface coating of a hard carbon fiber thermal insulation material provided in an embodiment of the utility model.

[0019] In the attached figure: storage tank 1; coating slurry 2; feed pump 3; feed pipeline 4; robotic arm 5; rotating motor 6; brush roller 7; rotating shaft 71; brush 72; storage chamber 73; feed hole 74; pressure scraper 8; sample to be coated 9; coating platform 10; limit clamp 11; slideway 12. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0022] like Figure 1-3 As shown, an automatic coating device for the surface coating of a hard carbon fiber thermal insulation material provided by an embodiment of the utility model comprises a coating platform 10 for placing a sample 9 to be coated, a plurality of limit clamps 11 for fixing the sample 9 to be coated are arranged in a circle on the coating platform 10, and a slideway 12 matching the limit clamp is also arranged on the coating platform 10; and further comprises:

[0023] A robotic arm 5, wherein the robotic arm 5 is installed on one side of the coating platform 10;

[0024] A brush roller 7, the brush roller 7 is mounted on the mechanical arm 5, the brush roller 7 includes a rotating shaft 71, the mechanical arm 5 is also provided with a rotating motor 6 for driving the rotating shaft 71 to rotate, the rotating shaft 71 is sleeved with a brush 72, and a storage cavity 73 is provided between the rotating shaft 71 and the brush 72, a plurality of small holes are provided on the side wall of the storage cavity 73, a feed hole 74 is provided at the center of the brush roller 7, and the feed hole 74 is connected to a feeding device, and the feeding device is used to transport the coating slurry 2 into the storage cavity;

[0025] A pressure scraper 8 is also installed on the mechanical arm 5 , and the pressure scraper 8 is installed on one side of the brush roller 7 .

[0026] In the embodiment of the utility model, when in use, the sample 9 to be coated is first placed on the coating platform 10. The level of the platform can be adjusted by the bolts of the anchor. The surface of the coating platform 10 is coated with polytetrafluoroethylene, which is convenient for cleaning and collecting the coating slurry 2 that flows down. After the sample 9 to be coated is placed on the coating platform 10, the limit clamp 11 will be driven by the stepper motor to push from the outside to the inside along the slide 12 to clamp the sample. Here, the three limit clamps 11 move synchronously and the moving distance remains consistent. When the sample 9 to be coated is not placed concentrically with the coating platform 10, the limit clamp 11 that first contacts the sample 9 to be coated will push the sample 9 to be coated toward the center of the coating platform 10 until all three limit clamps 11 contact the sample 9 to be coated. Here, three pressure or torque sensors are used to control the stop of the limit clamp 11. The limit clamp 11 is made of stainless steel with polytetrafluoroethylene coating, which is also convenient for cleaning excess slurry.

[0027] The feeding device delivers the configured coating slurry 2 to the storage chamber 71 in the brush roller 7 located at the front end of the robot arm 5, and the coating slurry 2 is retained from the small hole under pressure. The rotating motor 6 can drive the rotating shaft 71 to rotate, thereby driving the brush 72 to rotate synchronously. While coating, the pressure scraper 8 at the top of the robot arm 5 closely follows the coating trajectory of the brush roller 7 and scrapes the coating after being coated by the brush roller 7. First, the coating can be made smoother by scraping, and second, the pressure scraper 8 applies a certain pressure to press the slurry into the gaps of the fibers, making the coating more solid.

[0028] Before coating begins, the brush roller 7 is vertically lifted by the robot arm 5 just above the center of the coating platform 10. The dimensions of the material to be coated are input into the control system to control the rotation speed of the brush roller 7, as well as the speed, trajectory and number of revolutions of the robot arm 5 to control the primary thickness of the coating.

[0029] like Figure 1 As shown, as a preferred embodiment of the utility model, the feeding device includes a storage tank 1 for containing the coating slurry 2, the storage tank 1 is connected to the feed hole 74 on the brush roller 7 through a feed pipeline 4, and a feed pump 3 is also provided on the feed pipeline 4.

[0030] In the embodiment of the utility model, when in use, the prepared coating slurry 2 is injected into the storage tank 1, and the coating slurry 2 is slowly stirred at a speed of 20 revolutions per minute with a stirring paddle in the storage tank 1 to prevent the slurry from being unevenly viscous due to long-term storage. Then, the coating slurry 2 is delivered to the storage chamber 71 through the feed pump 3 with a flow meter and the feed pipeline 4. The pressure of the storage chamber 73 is controlled by controlling the flow rate of the feed pump 3, thereby controlling the amount of slurry flowing out along the bristle fibers, that is, controlling the amount of coating slurry 2.

[0031] As a preferred embodiment of the present invention, the brush 72 is a high-density hard short-fiber brush with a fiber length of 5-15 mm.

[0032] In the embodiment of the utility model, the length of the brush roller 7 can be selected according to the size of the material to be coated. For example, for cylindrical insulation materials, a longer brush roller 7 can be selected to brush the inner and outer walls of the cylindrical material. The simple internal and external structures of the cylindrical material can multiply the production efficiency through such equipment.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic coating device for the surface coating of a rigid carbon fiber thermal insulation material, characterized in that: The invention comprises a coating platform for placing a sample to be coated, and a plurality of limit clamps for fixing the sample to be coated are arranged in a circle on the coating platform, and a slideway matching the limit clamps is also arranged on the coating platform; and further comprises: A mechanical arm, wherein the mechanical arm is installed on one side of the coating platform; A brush roller, the brush roller is installed on a mechanical arm, the brush roller includes a rotating shaft, the mechanical arm is also provided with a rotating motor for driving the rotating shaft to rotate, a brush is sleeved on the rotating shaft, a storage cavity is provided between the rotating shaft and the brush, and a plurality of small holes are provided on the side wall of the storage cavity, a feed hole is provided at the center of the brush roller, and the feed hole is connected to a feeding device, and the feeding device is used to transport the coating slurry into the storage cavity; A pressure scraper is also installed on the mechanical arm, and the pressure scraper is installed on one side of the brush roller.

2. The automatic coating device for the surface coating of the hard carbon fiber thermal insulation material according to claim 1 is characterized in that: The surface of the coating platform is coated with polytetrafluoroethylene.

3. The automatic coating device for the surface coating of the hard carbon fiber thermal insulation material according to claim 1 is characterized in that: The limit clamp is made of stainless steel and has a polytetrafluoroethylene coating.

4. The automatic coating device for the surface coating of the hard carbon fiber thermal insulation material according to claim 1 is characterized in that: The feeding device comprises a storage tank for containing coating slurry, the storage tank is connected with a feeding hole on the brush roller through a feeding pipeline, and a feeding pump is also arranged on the feeding pipeline.

5. The automatic coating device for the surface coating of the hard carbon fiber thermal insulation material according to claim 4 is characterized in that: The storage tank is provided with a stirring paddle, and the rotation speed of the stirring paddle is 20 revolutions per minute.

6. The automatic coating device for the surface coating of the hard carbon fiber thermal insulation material according to claim 1 is characterized in that: The brush is made of high-density hard short fibers with a fiber length of 5-15 mm.

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