Film scraping device of ceramic inner hole silver coating device

Abstract

The utility model discloses a film scraping device of a ceramic inner hole silver coating device and the inner hole silver coating device. The film scraping device comprises a coating recycling barrel and a positioning seat, the positioning seat is arranged at an opening of the coating recycling barrel and communicates with the coating recycling barrel, and a through hole communicating with an inner hole of the ceramic workpiece is formed in the positioning seat in a penetrating mode; the coating recycling barrel is communicated with an external negative pressure device through a negative pressure joint; the coating recycling barrel is communicated with the through hole of the positioning seat and the inner hole of the ceramic workpiece; a negative pressure pneumatic film scraping structure is adopted, the film thickness control over the inner hole of the ceramic part with the inner hole coated is completed, negative pressure parameters are set according to the film coating requirement of a product and the viscosity of silver paste, and redundant silver paste in the inner hole of the ceramic part is pumped back into a coating recycling barrel through negative pressure vacuum pumping; redundant silver paste in the inner hole of the ceramic part is pumped back in a vacuum negative pressure mode, flowing and filling of the silver paste are effectively controlled, and therefore the uniformity of the coating is guaranteed, it is guaranteed that the metal film is well combined with the inner hole wall of the ceramic part, and the conductivity is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic inner hole coating, in particular to a film scraping device of a ceramic inner hole silver coating device. Background Art

[0002] In the positioning system, the positioning antenna is used to receive information from satellites or other signal sources, and to determine the location or navigation direction of the receiving device by analyzing this information. Positioning antennas usually use ceramic parts to support and protect internal components. Ceramic parts have excellent insulation properties, mechanical strength and high temperature resistance, which can effectively isolate and protect internal circuit components, prevent damage or interference from the external environment, improve the reliability and stability of the antenna, and are key components to ensure the normal operation of the antenna. The internal holes of these ceramic parts usually need to be metallized by silver coating, which can help form a uniform conductive film in the inner holes of the ceramic parts to ensure good conductivity, thereby ensuring smooth signal transmission. Through silver coating, the resistance and signal attenuation during signal transmission can be reduced, and the receiving and transmitting performance of the positioning antenna can be improved. With the continuous advancement of wireless communication technology, people's requirements for positioning accuracy and positioning speed are getting higher and higher, so the conductive performance of positioning antenna ceramic parts is becoming more and more critical.

[0003] In the prior art, commonly used silver coating processes include spraying and manual transfer coating. The spraying method is to evenly coat the silver coating on the surface of the internal channels of the positioning antenna ceramic part through a spraying device to form a conductive layer; while the manual transfer coating method is that the operator uses a manual tool (such as a brush, sponge, etc.) to evenly coat the mixed silver coating on the surface of the internal channels of the ceramic part, covering the entire surface and forming a coating. After silver coating, the film scraping operation is usually no longer performed, and the uniformity and consistency of the silver film are difficult to ensure. It cannot be guaranteed to avoid problems such as the fault of the silver layer, which affects the conductive performance of the positioning antenna, and the film thickness is difficult to control.

[0004] Therefore, further research and development is needed to solve the problems of the above-mentioned prior art. Utility Model Content

[0005] Therefore, in order to solve the problems existing in the above-mentioned prior art, the purpose of the present utility model is to provide a film scraping device for a ceramic inner hole silver coating device and a ceramic inner hole silver coating device.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A film scraping device for a ceramic inner hole silver coating device, used for removing the residual silver paste from the inner holes of a ceramic workpiece after the silver coating process is completed; characterized in that it comprises a paint recovery cylinder for recovering the silver paste of the ceramic workpiece and a positioning seat for fixing the ceramic workpiece; the positioning seat is arranged at the opening of the paint recovery cylinder, is communicated with the paint recovery cylinder, and the positioning seat is penetrated by a through hole communicated with the inner hole of the ceramic workpiece; the paint recovery cylinder is communicated with an external negative pressure device through a negative pressure joint; the paint recovery cylinder is communicated with the through hole of the positioning seat and the inner hole of the ceramic workpiece;

[0008] The negative pressure device evacuates air from the paint recovery cylinder, so that the residual silver paste in the inner hole of the ceramic workpiece enters into the paint recovery cylinder through the through hole of the positioning seat.

[0009] Furthermore, a staggered hole recovery component is provided on the positioning seat; the staggered hole recovery component includes a staggered hole plate movably arranged on the positioning seat, and the staggered hole plate is penetrated by guide holes corresponding to the through hole of the positioning seat and the inner hole of the ceramic workpiece; the residual silver paste in the inner hole of the ceramic enters the paint recovery cylinder through the guide hole and the through hole of the positioning seat.

[0010] Furthermore, the positioning seat is provided with a staggered hole cavity for the movement of the staggered hole plate, and one side of the positioning seat is provided with a driving device for driving the staggered hole plate to move; the driving device drives the staggered hole plate to move in the staggered hole cavity, so that the guide hole is correspondingly connected with the through hole of the positioning seat and the inner hole of the ceramic workpiece.

[0011] Furthermore, a mounting plate is provided on one side of the positioning seat, and a guide groove extending along the moving direction of the staggered hole plate is provided on the mounting plate; a guide block is provided at one end of the staggered hole plate connected to the driving device, and the staggered hole plate slides along the guide groove through the guide block.

[0012] Furthermore, the driving device is a driving cylinder, a cylinder body of the driving cylinder is fixed on a side of the mounting plate away from the positioning seat, and the guide block is drivingly connected to the telescopic rod of the driving cylinder.

[0013] Furthermore, a receiving portion adapted to the ceramic workpiece is provided on the upper surface of the positioning seat, and the ceramic workpiece is limitedly placed in the receiving portion; and an opening is provided on the periphery of the receiving portion for facilitating the taking and placing of the ceramic workpiece.

[0014] Furthermore, the film scraping device includes a base, the silver paste recovery cylinder is arranged on the base, the positioning seat is installed on the base through two columns, and the silver paste recovery cylinder is located between the columns.

[0015] Furthermore, the negative pressure device includes a negative pressure generator and a pressure regulating valve electrically connected to the negative pressure generator; the pressure regulating valve is used to adjust the pressure of the negative pressure generator.

[0016] Furthermore, the inner hole silver coating device also includes a negative pressure coating device, which is arranged on one side of the scraping device, including a storage cylinder for holding silver paste and a coating seat connected to the storage cylinder and used to fix the ceramic workpiece to be coated; the coating seat is penetrated by a coating hole corresponding to the inner hole of the ceramic workpiece;

[0017] A traction tube connected to the coating hole is provided in the material storage cylinder, and one end of the traction tube extends into the silver paste; the coating seat is connected to the coating negative pressure device through a coating joint; a pressure guide head is provided above the coating seat so as to be able to be raised and lowered; the lower part of the pressure guide head abuts against the upper surface of the ceramic workpiece; the coating joint is connected to the pressure guide head; a guide hole connected to the coating joint and the inner hole of the ceramic workpiece is provided inside the pressure guide head;

[0018] The paint negative pressure device performs negative pressure suction on the traction tube through the paint joint, and the silver paste in the storage cylinder enters the inner hole of the ceramic workpiece through the traction tube and the paint hole to complete the coating of the inner hole.

[0019] Furthermore, a residual material storage chamber is provided inside the pressing guide head and is connected to the through hole. The inner diameter of the residual material storage chamber is larger than the inner diameter of the guide hole, and is used to store excess silver paste after entering the inner hole of the ceramic workpiece through the traction tube and the coating hole and completing the coating of the inner hole.

[0020] Furthermore, the material storage barrel is connected to the material return negative pressure device through a material return joint; the material return negative pressure device performs negative pressure suction on the material storage barrel through the material return joint, so that excess metal slurry after coating the inner hole of the ceramic workpiece can flow back into the material storage barrel through the traction tube.

[0021] Compared with the prior art, the beneficial effects of the present invention are at least in the following aspects:

[0022] 1. The utility model is applied in the inner hole coating device of ceramic parts, and adopts a negative pressure pneumatic scraping film structure to complete the film thickness control of the inner hole of the ceramic parts for inner hole coating, ensure the thickness uniformity and bonding strength of the metal film layer in the inner hole of the ceramic parts, and ensure the reliability and consistency of the product. Specifically, the negative pressure parameters are set according to the coating requirements of the product and the viscosity of the silver paste, and the excess silver paste in the inner hole of the ceramic parts is sucked back into the paint recovery cylinder through negative pressure vacuum pumping; the utility model can effectively control the flow and filling of the silver paste by sucking back the excess silver paste in the inner hole of the ceramic parts by vacuum negative pressure, thereby ensuring the uniformity of the coating, and also ensuring the good bonding between the metal film and the inner hole wall of the ceramic, which not only enhances the durability and service life of the product, but also can significantly improve the conductivity;

[0023] 2. Compared with the prior art method of using a rotating shaft structure to pierce the scraper, the utility model uses negative pressure vacuum to draw excess silver paste back into the paint recovery cylinder, ensuring that the coating thickness of each inner hole is uniform. This precise coating control not only meets the coating requirements of the product, but also avoids quality problems caused by excessive coating or uneven coating; in addition, the excess silver paste is recovered simultaneously, which not only reduces the waste of paint, but also meets environmental protection requirements, while reducing production costs and improving resource utilization efficiency;

[0024] 3. The utility model is also provided with a staggered hole recovery component, which controls the guide hole of the staggered hole plate to correspond to the inner hole of the ceramic part through a movable staggered hole plate. After the negative pressure device is started, the residual silver paste in the inner hole of the ceramic workpiece enters the coating recovery cylinder through the through hole of the positioning seat; further, when processing the inner hole coating operation of a porous ceramic part, it can be ensured that each film scraping operation only corresponds to one inner hole of the ceramic part, ensuring that each single hole operation is performed, avoiding uneven air extraction caused by porous operations, thereby negatively affecting the uniformity of the coating thickness of each inner hole and affecting the inner hole coating yield;

[0025] 4. The ceramic part inner hole coating device used in the utility model adopts the negative pressure slurry suction method to perform the ceramic part inner hole coating operation. The negative pressure parameters can be adjusted according to the coating thickness required by the product and the viscosity of the silver paste, so as to achieve precise control and ensure the uniform distribution of the silver paste in the ceramic part inner hole coating process, effectively improving the silver coating quality; at the same time, it can also effectively recycle excess silver paste, which helps to reduce production costs, reduces the waste processing and cleaning process, saves time and labor costs, enhances the overall efficiency of the production line, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a ceramic workpiece of the ceramic inner hole silver coating device of Embodiment 1-2 of the utility model;

[0027] Figure 2This is a schematic diagram of the overall structure of the scraping device of the ceramic inner hole silver coating device of Example 1-2 of the utility model;

[0028] Figure 3 This is a schematic diagram of the overall structure of the scraping device of the ceramic inner hole silver coating device of Example 1-2 of the utility model;

[0029] Figure 4 This is a schematic cross-sectional view of the overall structure of the scraping device of the ceramic inner hole silver coating device of Example 1-2 of the utility model;

[0030] Figure 5 This is a schematic diagram of the overall structure of the staggered hole recovery component of the scraping device of the ceramic inner hole silver coating device of Example 1-2 of the utility model;

[0031] Figure 6 This is another angle schematic diagram of the overall structure of the staggered hole recovery component of the scraping device of the ceramic inner hole silver coating device of Example 1-2 of the utility model;

[0032] Figure 7 This is a schematic diagram of the overall structure of the staggered hole recovery component of the scraping device of the ceramic inner hole silver coating device of Example 1-2 of the utility model;

[0033] Figure 8 This is a schematic diagram of the overall structure of a ceramic inner hole silver coating device applied to a scraping device of the ceramic inner hole silver coating device of Embodiment 1-2 of the utility model;

[0034] Fig. 9 This is a schematic cross-sectional diagram of the overall structure of a negative pressure coating device for a ceramic inner pore silver coating device applied to a scraping device of the ceramic inner pore silver coating device of Embodiment 1-2 of the utility model.

[0035] In the figure:

[0036] 1. Paint recovery cylinder; 2. Positioning seat; 21. Through hole; 22. Staggered hole cavity; 23. Accommodation part; 231. Opening; 3. Negative pressure joint; 4. Negative pressure device; 41. Negative pressure generator; 42. Pressure regulating valve; 5. Staggered hole recovery assembly; 51. Staggered hole plate; 511. Guide block; 512. Guide hole; 6. Driving device; 7. Mounting plate; 71. Guide groove; 8. Base; 9. Column;

[0037] 10. Ceramic workpiece; 101. Inner hole.

[0038] 20. Negative pressure paint device; 201. Material storage barrel; 2011. Traction tube; 202. Paint seat; 203. Paint hole; 204. Paint joint; 205. Paint negative pressure device; 206. Material pressing guide head; 2061. Guide hole; 2062. Residual material storage chamber; 207. Return material joint; 208. Return material negative pressure device. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the utility model, the technical solutions and advantages of the utility model are further described in detail below in conjunction with the accompanying drawings and embodiments. The specific structure and features of the utility model are described below in an exemplary manner, which should not constitute any limitation to the utility model. The preferred implementation of the utility model is given in the accompanying drawings. However, the utility model can be implemented in many different forms and is not limited to the implementation described herein.

[0040] Example 1

[0041] refer to Figure 1-7 The utility model provides a scraping device for a ceramic inner hole silver coating device, which is used to remove the silver paste residue from the inner holes of a ceramic workpiece 10 after the silver coating process is completed; it includes a paint recovery cylinder 1 for recovering the silver paste of the ceramic workpiece 10, and a positioning seat 2 for fixing the ceramic workpiece 10; the positioning seat 2 is arranged at an opening 231 of the paint recovery cylinder 1, is connected with the paint recovery cylinder 1, and the positioning seat 2 is penetrated by a through hole 21 connected with the inner hole of the ceramic workpiece 10; the paint recovery cylinder 1 is connected with an external negative pressure device 4 through a negative pressure joint 3; the paint recovery cylinder 1 is connected with the through hole 21 of the positioning seat 2 and the inner hole of the ceramic workpiece 10;

[0042] The negative pressure device 4 evacuates air from the paint recovery cylinder 1 , so that the residual silver paste in the inner hole of the ceramic workpiece 10 enters into the paint recovery cylinder 1 through the through hole 21 of the positioning seat 2 .

[0043] In this embodiment, the hole diameter Φ of the inner hole of the ceramic workpiece 10 can be 2-4 mm, and the overall thickness h of the ceramic workpiece can be 5.5-6.5 mm; and the thickness of the metal coating film on the inner hole of the ceramic workpiece 10 is 5-6 μm (allowable range 4-10 μm).

[0044] In this embodiment, the silver content of the silver paste is 63%, the ambient temperature is 28-29°C (standard is 5-35°C); the silver paste viscosity is 7000-9000mpa.s. The silver paste coating thickness is controlled to be 5-6μm (allowable range is 4-10μm). According to the above silver coating control conditions, in the inner hole silver coating and scraping film with an aperture of 3.2mm, the negative pressure suction pressure of the utility model is 0.5-0.6mpa, and the duration is 0.2-0.5s.

[0045] It should be noted that the above parameters are only used as process examples for the application of the structure of the utility model. The utility model is also applicable to silver coating of inner holes of ceramic parts of other specifications, as long as the suction pressure and duration required by the utility model are adjusted according to the silver coating parameters.

[0046] This embodiment 1 adopts a negative pressure pneumatic film scraping structure to complete the film thickness control of the inner hole of the ceramic part coated with the inner hole, ensure the thickness uniformity and bonding strength of the metal film layer in the inner hole of the ceramic part, and ensure product reliability and consistency. Specifically, the negative pressure parameters are set according to the coating requirements of the product and the viscosity of the silver paste, and the excess silver paste in the inner hole of the ceramic part is sucked back into the paint recovery cylinder by negative pressure vacuum pumping; the utility model can effectively control the flow and filling of the silver paste by sucking back the excess silver paste in the inner hole of the ceramic part by vacuum negative pressure, thereby ensuring the uniformity of the coating, and also ensuring the good bonding of the metal film and the inner hole wall of the ceramic, which not only enhances the durability and service life of the product, but also can significantly improve the conductivity.

[0047] Optionally, a staggered hole recovery component 5 is provided on the positioning seat 2; the staggered hole recovery component 5 includes a staggered hole plate movably arranged on the positioning seat 2, and the staggered hole plate is penetrated by a guide hole 512 corresponding to the through hole 21 of the positioning seat 2 and the inner hole of the ceramic workpiece 10; the residual silver paste in the inner hole of the ceramic enters the paint recovery cylinder 1 through the guide hole 512 and the through hole 21 of the positioning seat 2.

[0048] To be further detailed, the positioning seat 2 is provided with a staggered hole cavity 22 for the movement of the staggered hole plate, and one side of the positioning seat 2 is provided with a driving device 6 for driving the movement of the staggered hole plate; the driving device 6 is a driving cylinder, and the cylinder body of the driving cylinder is fixed on the side of the mounting plate away from the positioning seat 2, and the guide block 511 is transmission-connected with the telescopic rod of the driving cylinder.

[0049] The driving device 6 drives the staggered hole plate to move in the staggered hole cavity 22, so that the guide hole 512 is correspondingly connected with the through hole 21 of the positioning seat 2 and the inner hole of the ceramic workpiece 10. In addition, a mounting plate 7 is provided on one side of the positioning seat 2, and a guide groove 71 extending along the moving direction of the staggered hole plate is provided on the mounting plate 7; a guide block 511 is provided at one end of the staggered hole plate connected to the driving device 6, and the staggered hole plate slides along the guide groove 71 through the guide block 511.

[0050] The utility model is provided with the above-mentioned staggered hole recovery component, and through the movable staggered hole plate, the guide hole of the staggered hole plate is controlled to correspond to the inner hole of the ceramic part. After the negative pressure device is started, the residual silver paste in the inner hole of the ceramic workpiece enters the coating recovery cylinder through the through hole of the positioning seat; further, when processing the inner hole coating operation of the porous ceramic part, it can be ensured that each scraping operation only corresponds to one inner hole of the ceramic part, ensuring that a single hole operation is performed each time, avoiding uneven air extraction caused by porous operation, thereby negatively affecting the uniformity of the coating thickness of each inner hole, affecting the inner hole coating yield.

[0051] In order to further improve the stability of the ceramic piece, optionally, the upper surface of the positioning seat 2 is provided with a receiving portion 23 adapted to the ceramic workpiece 10, and the ceramic workpiece 10 is limitedly placed in the receiving portion 23; the periphery of the receiving portion 23 is provided with an opening 231 for conveniently taking and placing the ceramic workpiece 10. The ceramic piece is placed in the receiving portion 23 for film scraping operation, and the opening is provided around the receiving portion 23 for more conveniently taking and placing the ceramic piece.

[0052] In this embodiment, the film scraping device includes a base 8, the silver paste recovery tube is arranged on the base 8, the positioning seat 2 is installed on the base 8 through two columns, and the silver paste recovery tube is located between the columns.

[0053] Optionally, the negative pressure device 4 includes a negative pressure generator and a pressure regulating valve electrically connected to the negative pressure generator; the pressure regulating valve is used to adjust the pressure of the negative pressure generator. In this embodiment, the negative pressure generator, the pressure regulating valve and other components can be conventionally purchased components in the prior art, and their installation methods and working principles can refer to the prior art, as long as they meet the beneficial effects of the utility model.

[0054] Example 2

[0055] like Figure 8-9 As shown, this embodiment provides an inner hole silver coating device, which also includes a negative pressure coating device 20, the negative pressure coating device 20 is arranged on one side of the scraping device, including a storage cylinder 201 for holding silver paste and a coating seat 202 connected to the storage cylinder 201 and used to fix the ceramic workpiece 10 to be coated; the coating seat 202 is penetrated by a coating hole 203 corresponding to the inner hole of the ceramic workpiece;

[0056] The material storage barrel 201 is provided with a traction tube 2011 connected with the coating hole 203, and one end of the traction tube 2011 extends into the silver paste; the coating seat 202 is connected with the coating negative pressure device 205 through the coating joint 204; a material pressing guide 206 is provided above the coating seat 202 so as to be movable; the lower part of the material pressing guide 206 abuts against the upper surface of the ceramic piece; the coating joint 204 is connected with the material pressing guide 206; a guide hole 2061 is provided inside the material pressing guide 206 and is connected with the coating joint and the inner hole of the ceramic workpiece;

[0057] The paint negative pressure device 205 performs negative pressure suction on the traction tube 2011 through the paint joint, and the silver paste in the storage barrel 201 enters the inner hole of the ceramic workpiece through the traction tube 2011 and the paint hole 203 to complete the coating of the inner hole.

[0058] In this embodiment, the pressure guide head has at least two functions. On the one hand, the pressure guide head is used to connect the coating joint and the material storage barrel to form a negative pressure channel, which is convenient for the negative pressure device 205 to perform negative pressure suction on the traction tube 2011 through the coating joint to perform the slurry suction operation; on the other hand, the pressure guide head can be raised and lowered. When the inner hole coating operation is required, the pressure guide head is pressed against the ceramic part to press the ceramic part so that the negative pressure is better formed in the material storage barrel; the pressure guide head is pressed against the ceramic part to avoid the adverse effects of air intake on the slurry suction operation.

[0059] In this embodiment, the aperture Φ of the inner hole of the ceramic part can be 2-4mm, and the overall thickness h of the ceramic part can be 5.5-6.5mm; and the film thickness of the metal coating of the inner hole of the ceramic part is 5-6μm (the allowable range is 4-10μm). The silver content of the silver paste is 63%, and the ambient temperature is 28-29℃ (the standard is 5-35℃); the silver paste viscosity is 7000-9000mpa.s. The thickness of the silver paste coating is controlled to be 5-6μm (the allowable range is 4-10μm). According to the above slurry parameters, the coating slurry suction pressure of the inner hole coating device of the utility model is 0.25-0.3MPa, and the duration is 0.2-0.3s.

[0060] Optionally, a residual material storage chamber 2062 is provided inside the pressing guide head 206 and is connected to the guide hole 2061. The inner diameter of the residual material storage chamber 2062 is larger than the inner diameter of the guide hole 2061, and is used to store excess silver paste after entering the inner hole of the ceramic part through the traction tube 2011 and the coating hole 203 and completing the coating of the inner hole.

[0061] Optionally, the material storage barrel is connected to the return material negative pressure device 208 via the return material joint 207; the return material negative pressure device 208 performs negative pressure suction on the material storage barrel 201 via the return material joint 207, so that the excess metal slurry after the inner hole of the ceramic part is coated can flow back to the material storage barrel through the traction tube. In this embodiment, the purpose of setting the excess material storage chamber is to ensure that the excess material after the inner hole of the ceramic part is coated can be temporarily stored in the excess material storage chamber, and will not cause pollution to other parts of the ceramic part or the coating seat and waste of metal slurry, and the design is reasonable. Returning the excess metal slurry in the inner hole of the ceramic part after coating to the material storage barrel not only reduces the waste of metal slurry, but also improves the utilization efficiency of materials. In large-scale production, even a small amount of savings can significantly reduce costs and resource consumption.

[0062] The ceramic part inner hole coating device applied by the utility model adopts the negative pressure slurry suction method to perform the ceramic part inner hole coating operation, and the negative pressure parameters can be adjusted according to the coating thickness required by the product and the viscosity of the silver paste, so as to achieve precise control and ensure the uniform distribution of the silver paste in the ceramic part inner hole coating process, and effectively improve the silver coating quality; at the same time, it can also effectively recycle the excess silver paste, which helps to reduce production costs, reduces the waste processing and cleaning process, saves time and labor costs, enhances the overall efficiency of the production line, and has strong practicality.

[0063] It should be noted that the present invention also includes other sensing components, control elements, etc. that meet the requirements of implementation, which are not described in detail here.

[0064] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. For ordinary technicians in this field, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A scraping device for a ceramic inner hole silver coating device, used to remove the residual silver paste from the inner holes of a ceramic workpiece after the silver coating process is completed; characterized in that: It comprises a paint recovery cylinder for recovering silver paste of a ceramic workpiece and a positioning seat for fixing the ceramic workpiece; the positioning seat is arranged at the opening of the paint recovery cylinder and is communicated with the paint recovery cylinder, and the positioning seat is penetrated by a through hole communicated with the inner hole of the ceramic workpiece; the paint recovery cylinder is communicated with an external negative pressure device through a negative pressure joint; the paint recovery cylinder is communicated with the through hole of the positioning seat and the inner hole of the ceramic workpiece; The negative pressure device evacuates air from the paint recovery cylinder, so that the residual silver paste in the inner hole of the ceramic workpiece enters into the paint recovery cylinder through the through hole of the positioning seat.

2. The scraping device of the ceramic inner hole silver coating device according to claim 1, characterized in that: A staggered hole recovery component is provided on the positioning seat; the staggered hole recovery component includes a staggered hole plate movably arranged on the positioning seat, and the staggered hole plate is penetrated by guide holes corresponding to the through hole of the positioning seat and the inner hole of the ceramic workpiece; the residual silver paste in the inner hole of the ceramic enters the paint recovery cylinder through the guide hole and the through hole of the positioning seat.

3. The scraping device of the ceramic inner hole silver coating device according to claim 2, characterized in that: The positioning seat is provided with a staggered hole cavity for the staggered hole plate to move, and one side of the positioning seat is provided with a driving device for driving the staggered hole plate to move; the driving device drives the staggered hole plate to move in the staggered hole cavity, so that the guide hole is correspondingly connected with the through hole of the positioning seat and the inner hole of the ceramic workpiece.

4. The scraping device of the ceramic inner hole silver coating device according to claim 3, characterized in that: A mounting plate is provided on one side of the positioning seat, and a guide groove extending along the moving direction of the staggered hole plate is provided on the mounting plate; a guide block is provided at one end of the staggered hole plate connected to the driving device, and the staggered hole plate slides along the guide groove through the guide block.

5. The scraping device of the ceramic inner hole silver coating device according to claim 4, characterized in that: The driving device is a driving cylinder, a cylinder body of the driving cylinder is fixed on a side of the mounting plate away from the positioning seat, and the guide block is drivingly connected with the telescopic rod of the driving cylinder.

6. The scraping device of the ceramic inner hole silver coating device according to claim 5, characterized in that: The upper surface of the positioning seat is provided with a receiving portion adapted to the ceramic workpiece, and the ceramic workpiece is limitedly placed in the receiving portion; the periphery of the receiving portion is provided with an opening for facilitating the taking and placing of the ceramic workpiece.

7. The scraping device of the ceramic inner hole silver coating device according to claim 1, characterized in that: The film scraping device comprises a base, the silver paste recovery cylinder is arranged on the base, the positioning seat is installed on the base through two columns, and the silver paste recovery cylinder is located between the columns.

8. The scraping device of the ceramic inner hole silver coating device according to claim 1, characterized in that: The negative pressure device includes a negative pressure generator and a pressure regulating valve electrically connected to the negative pressure generator; the pressure regulating valve is used to adjust the pressure of the negative pressure generator.

9. An inner hole silver coating device, comprising a film scraping device of a ceramic inner hole silver coating device according to any one of claims 1 to 8; characterized in that: The inner hole silver coating device also includes a negative pressure coating device, which is arranged on one side of the scraping device, including a storage barrel for holding silver paste and a coating seat connected to the storage barrel and used to fix the ceramic workpiece to be coated; a coating hole corresponding to the inner hole of the ceramic workpiece is penetrated on the coating seat; a traction tube connected to the coating hole is provided in the storage barrel, and one end of the traction tube extends into the silver paste; the coating seat is connected to the coating negative pressure device through a coating joint; a pressing guide head is provided above the coating seat so as to be liftable; the lower part of the pressing guide head abuts against the upper surface of the ceramic workpiece; the coating joint is connected to the pressing guide head; a guide hole connected to the coating joint and the inner hole of the ceramic workpiece is penetrated inside the pressing guide head.

10. The inner hole silver coating device according to claim 9, characterized in that: The press guide head is provided with a residual material storage cavity which is connected to the through hole. The inner diameter of the residual material storage cavity is larger than the inner diameter of the guide hole, and is used to store excess silver paste after entering the inner hole of the ceramic workpiece through the traction tube and the coating hole and completing the coating of the inner hole.

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