A kind of carbon film resistance with positioning mechanism is painted device

Abstract

The utility model discloses a kind of carbon film resistance is painted with positioning mechanism, belong to resistance production equipment technical field, it includes workbench, workbench top side slidingly connected with movable block, storage tank is set in fixed support frame top, storage tank bottom is provided with material conveying pipe and discharge pipe, spray head is set in discharge pipe, discharge pipe is located carbon film resistance body top;The utility model is through first sliding slot, make movable block slide to discharge pipe directly below, make carbon film resistance body accurate alignment spray station, start cylinder, gas is supplied by gas supply pipe, drive second pressing plate vertically drop along the second sliding slot in fixed plate, and two racks are symmetrical structure, gear rotation will drive, so first pressing plate can move left and second pressing plate moves right, when double pressing plate moves reversely, resistance is rotated by the friction force between rubber pad and pin, make carbon film resistance body complete all-around rotation under fixed state, create conditions for uniform spraying.

Description

Technical Field

[0001] This utility model belongs to the technical field of resistor production equipment, specifically a coating device for carbon film resistors with a positioning mechanism. Background Technology

[0002] As a commonly used basic component in electronic circuits, carbon film resistors require a protective coating on their surface during the manufacturing process to improve product performance and lifespan. Carbon film resistors are made by tightly attaching a carbon film to the surface of a ceramic rod using high-temperature vacuum coating technology, followed by cutting the connector and sealing it with epoxy resin for protection. Their surface is usually coated with green protective paint. Carbon film resistors are affordable, have stable performance, and cover a wide range of resistance and power ratings.

[0003] Currently, there are various carbon film resistor coating devices on the market. Some existing devices use a conveyor belt to drive the carbon film resistor through the top of the paint cylinder for coating. In these devices, the carbon film resistor is transported to the coating area by the movement of the conveyor belt and comes into contact with the rotating paint cylinder to achieve paint adhesion. Other devices use limit blocks to limit the position of the carbon film resistor and complete the resistor coating process through the coordinated operation of the conveyor belt.

[0004] However, existing carbon film resistor coating devices have many shortcomings. First, in terms of positioning, traditional devices are difficult to achieve precise positioning. The position of the carbon film resistor on the conveyor belt is prone to deviation, which means that it cannot be accurately positioned directly below the paint nozzle or paint cylinder during the coating process. This results in deviation in the coating position and affects the uniformity and consistency of the coating effect. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a carbon film resistor coating device with a positioning mechanism, which solves the problem that the position of the existing carbon film resistor coating device is prone to deviation when the carbon film resistor is transported by the conveyor belt, resulting in it not being accurately positioned directly below the paint nozzle or paint cylinder during the coating process, thus causing deviation in the coating position and affecting the uniformity and consistency of the coating effect.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a coating device for carbon film resistors with a positioning mechanism, comprising a worktable, movable blocks slidably connected to both sides of the top of the worktable, a fixed block disposed on the top of the movable blocks, a first pressure plate slidably connected inside the fixed block, multiple sets of limiting blocks disposed on both sides of the fixed block, multiple sets of carbon film resistor bodies placed on the top of the fixed block, the pins on both sides of the carbon film resistor bodies located on the top of the limiting blocks, a fixed plate mounted on one side of the top of the movable block, cylinders fixedly connected to the top of the fixed plate in a symmetrical structure, and an air supply pipe for use with the cylinder disposed on the top of the fixed plate. A second pressure plate is fixedly connected to the cylinder output end. A first rack is fixedly connected to one side of the first pressure plate. A second rack is slidably connected to the inner side of the fixed plate. A motor is installed on the top of the fixed block. A gear is coaxially fixedly connected to the output end of the motor. The gear is located between the first rack and the second rack. A limit groove is provided on one side of the top of the second rack. One end of the second pressure plate is located in the limit groove. A fixed support frame is installed on the top of the workbench. A storage box is provided above the fixed support frame. A conveying pipe and a discharge pipe are provided at the bottom of the storage box. A nozzle is provided in the discharge pipe. The discharge pipe is located above the carbon film resistor body.

[0007] As a further embodiment of this utility model: the workbench has a cavity, and the bottom of the workbench is connected to an air inlet pipe. The top of the workbench has multiple sets of exhaust ports used in conjunction with the air inlet pipe. The exhaust ports are located below the discharge pipe, and the carbon film resistor body is located above the exhaust ports.

[0008] As a further embodiment of this utility model: the limiting block has a semi-arc structure, and the fixing block has an active groove that works in conjunction with the first pressure plate.

[0009] As a further embodiment of this utility model: rubber pads are provided on the inner surfaces of both the first pressure plate and the second pressure plate, and multiple sets of support legs are provided at the bottom of the workbench.

[0010] As a further embodiment of this utility model: the top two sides of the workbench are provided with first sliding grooves for use with the movable block, and the fixed plate is provided with second sliding grooves for use with the first rack and the second pressure plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. The movable block is slid to the bottom of the discharge pipe through the first slide groove, so that the carbon film resistor body is accurately aligned with the spraying station. The cylinder is started and air is supplied through the air supply pipe to drive the second pressure plate to descend vertically along the second slide groove in the fixed plate. One end of the second pressure plate is inserted into the limiting slot of the second rack, and the other end cooperates with the first pressure plate in the fixed block. Through the elastic compression of the rubber pad, the leads on both sides of the resistor are fixed to the top of the semi-circular limiting block to avoid rigid contact damage to the leads.

[0013] 2. When the motor is turned on, the gears at its output end rotate synchronously. Since the gears are located between the first and second racks and the two racks are symmetrical, the rotation of the gears will drive the first pressure plate to move to the left and the second pressure plate to move to the right. When the two pressure plates move in opposite directions, the friction between the rubber pad and the pins will drive the resistor to rotate, so that the carbon film resistor body can complete the omnidirectional rotation in a fixed state, creating conditions for uniform spraying. Attached Figure Description

[0014] Figure 1 This is a first schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a second-view schematic diagram of the overall structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 4 This is a first-person perspective schematic diagram showing the disassembly effect of the main structure of this utility model;

[0018] Figure 5 This is a second-view schematic diagram showing the disassembly effect of the main structure of this utility model.

[0019] In the diagram: 1. Workbench; 2. Fixed support frame; 3. Storage bin; 4. Movable block; 5. Motor; 6. Fixed plate; 7. First chute; 8. Feed pipe; 9. Discharge pipe; 10. Carbon film resistor body; 11. Exhaust vent; 12. Fixed block; 13. Air inlet pipe; 14. Air supply pipe; 15. Cylinder; 16. First pressure plate; 17. Second pressure plate; 18. First rack; 19. Second rack; 20. Limiting slot; 21. Second chute; 22. Limiting block; 23. Gear. Detailed Implementation

[0020] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0021] like Figures 1-5 As shown, this utility model provides a technical solution:

[0022] A coating device for carbon film resistors with a positioning mechanism includes a worktable 1. Movable blocks 4 are slidably connected to both sides of the top of the worktable 1. A fixed block 12 is positioned on the top of the movable blocks 4. A first pressure plate 16 is slidably connected inside the fixed block 12. Multiple sets of limiting blocks 22 are arranged on both sides of the fixed block 12. Multiple sets of carbon film resistor bodies 10 are placed on the top of the fixed block 12. The pins on both sides of the carbon film resistor bodies 10 are located on the top of the limiting blocks 22. A fixing plate 6 is installed on one side of the top of the movable blocks 4. Cylinders 15 are symmetrically fixedly connected to the top of the fixing plate 6. An air supply pipe 14 for use with the cylinder 15 is provided on the top of the fixing plate 6. A first pressure plate 16 is fixedly connected to the output end of the cylinder 15. The first pressure plate 16 has a first rack 18 fixedly connected to one side, and a second rack 19 slidably connected to the inner side of the fixed plate 6. The top of the fixed block 12 is equipped with a motor 5, and the output end of the motor 5 is coaxially fixedly connected with a gear 23. The gear 23 is located between the first rack 18 and the second rack 19. The top side of the second rack 19 is provided with a limit slot 20, and one end of the second pressure plate 17 is located in the limit slot 20. The top of the workbench 1 is equipped with a fixed support frame 2, and a storage box 3 is provided above the fixed support frame 2. The bottom of the storage box 3 is provided with a conveying pipe 8 and a discharge pipe 9. A nozzle is provided in the discharge pipe 9, and the discharge pipe 9 is located above the carbon film resistor body 10.

[0023] Specifically, the movable block 4 is slid to a suitable position on both sides of the top of the workbench 1, so that the carbon film resistor body 10 is located below the discharge pipe 9. The cylinder 15 is started, and air is supplied through the air supply pipe 14, causing the output end of the cylinder 15 to drive the second pressure plate 17 to descend. During the descent of the second pressure plate 17, one end of it is engaged in the limiting slot 20 at the top of the second rack 19, and at the same time cooperates with the first pressure plate 16 to apply pressure to the pins on both sides of the carbon film resistor body 10, thereby fixing the pins. The motor 5 is turned on, and the gear 23 at the output end of the motor 5 begins to rotate. Since the gear 23 is located between the first rack 18 and the second rack 19, and the first rack 18 and the second rack 19 have an up-down symmetrical structure, the rotation of the gear 23 will drive the first rack 18 to move to the left and the second rack 19 to move to the right. The second rack 19 moves to the right, the first rack 18 is fixedly connected to the first pressure plate 16 in the fixed block 12, and the second rack 19 is indirectly linked to the second pressure plate 17 in the fixed plate 6, so that the first pressure plate 16 and the second pressure plate 17 move in opposite directions, driving the pin to rotate, and thus causing the carbon film resistor body 10 to rotate as a whole. During the rotation of the carbon film resistor body 10, the protective coating in the storage tank 3 flows into the discharge pipe 9 through the conveying pipe 8 and is evenly sprayed on the outside of the resistor body through the nozzle. The rotation of the resistor ensures that the coating adheres in all directions without dead corners, forming a complete protective layer. After the coating is completed, the motor 5 and the cylinder 15 are turned off, the second pressure plate 17 rises and resets, and the sliding movable block 4 moves the coated carbon film resistor body 10 out of the working area.

[0024] The workbench 1 has a cavity, and the bottom of the workbench 1 is connected to an air inlet pipe 13. The top of the workbench 1 has multiple sets of exhaust ports 11 that are used in conjunction with the air inlet pipe 13. The exhaust ports 11 are located below the discharge pipe 9, and the carbon film resistor body 10 is located above the exhaust ports 11. The limiting block 22 has a semi-arc structure, and the fixing block 12 has a movable groove that is used in conjunction with the first pressure plate 16.

[0025] Specifically, the air inlet pipe 13 inputs air into the cavity of the workbench 1 and discharges it upward through the exhaust port 11, forming a directional airflow field around the carbon film resistor body 10. The airflow directly blows on the surface of the resistor, which helps to accelerate the drying speed of the protective coating. The upward flow direction of the airflow can offset part of the influence of gravity and reduce the accumulation of coating on the bottom of the resistor. Combined with the rotation action, it further ensures that the coating thickness is uniform after drying. The curved surface of the semi-arc limiting block 22 matches the shape of the carbon film resistor pins and can fit tightly against both sides of the pins, providing uniform support force.

[0026] Rubber pads are provided on the inner surfaces of the first pressure plate 16 and the second pressure plate 17. Multiple sets of support legs are provided at the bottom of the workbench 1. First slide grooves 7 are provided on both sides of the top of the workbench 1 to cooperate with the movable block 4. Second slide grooves 21 are provided on the fixed plate 6 to cooperate with the first rack 18 and the second pressure plate 17.

[0027] Specifically, the elastic cushioning properties of the rubber pad can prevent the metal surface of the pressure plate from directly squeezing the pin, preventing pin deformation, indentation or plating damage caused by rigid contact. The cooperation between the first slide groove 7 and the second slide groove 21 facilitates the flexible movement of the first pressure plate 16 and the second pressure plate 17.

[0028] The working principle of this utility model is as follows:

[0029] First, the movable block 4 is slid to the bottom of the discharge pipe 9 via the first slide groove 7, so that the carbon film resistor body 10 is precisely aligned with the spraying station. The cylinder 15 is started, and air is supplied through the air supply pipe 14 to drive the second pressure plate 17 to descend vertically along the second slide groove 21 in the fixed plate 6. One end of the second pressure plate 17 is inserted into the limiting slot 20 of the second rack 19, and the other end cooperates with the first pressure plate 16 in the fixed block 12. Through the elastic compression of the rubber pad, the leads on both sides of the resistor are fixed to the top of the semi-circular limiting block 22 to avoid rigid contact damage to the leads.

[0030] Secondly, when the motor 5 is turned on, the gear 23 at its output end rotates synchronously. Since the gear 23 is located between the first rack 18 and the second rack 19, and the two racks are symmetrical, the rotation of the gear 23 will drive the first pressure plate 16 to move to the left and the second pressure plate 17 to move to the right. When the two pressure plates move in opposite directions, the friction between the rubber pad and the pin drives the resistor to rotate, so that the carbon film resistor body 10 can complete the omnidirectional rotation in a fixed state, creating conditions for uniform spraying.

[0031] It is worth mentioning that the air inlet pipe 13 inputs air into the cavity of the workbench 1 and discharges it upward through the top exhaust port 11, forming an airflow path from bottom to top around the resistor. The airflow is opposed to the spraying direction, reducing paint dripping and accumulation. Combined with the rotation of the resistor, it ensures uniform coating thickness. The airflow blows on the surface of the resistor, accelerating the evaporation of paint solvent. At the same time, preheating airflow can be connected to improve drying efficiency and shorten the process time.

[0032] Finally, the protective coating in the storage tank 3 flows into the discharge pipe 9 through the conveying pipe 8 and is sprayed onto the rotating resistor body through the nozzle. The rotation ensures that the coating adheres without dead corners and forms a complete protective layer. After the spraying is completed, the motor 5 and cylinder 15 are turned off, the second pressure plate 17 rises and resets along the second slide 21, the pin clamp is released, and the sliding movable block 4 moves the finished product out of the working area and enters the next cycle.

[0033] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A coating device for carbon film resistors with a positioning mechanism, comprising a worktable (1), characterized in that: The workbench (1) has movable blocks (4) slidably connected to both sides of its top. A fixed block (12) is set on the top of the movable block (4). A first pressure plate (16) is slidably connected inside the fixed block (12). Multiple sets of limit blocks (22) are set on both sides of the fixed block (12). Multiple sets of carbon film resistor bodies (10) are placed on the top of the fixed block (12). The pins on both sides of the carbon film resistor bodies (10) are located on the top of the limit blocks (22). A fixed plate (6) is installed on one side of the top of the movable block (4). A cylinder (15) is fixedly connected to the top of the fixed plate (6) in a symmetrical structure. An air supply pipe (14) for use with the cylinder (15) is set on the top of the fixed plate (6). A second pressure plate (17) is fixedly connected to the output end of the cylinder (15). A first pressure plate (16) is fixedly connected to one side of the first pressure plate (16). A first rack (18) is connected, and a second rack (19) is slidably connected to the inner side of the fixing plate (6). A motor (5) is provided on the top of the fixing block (12). A gear (23) is coaxially fixedly connected to the output end of the motor (5). The gear (23) is located between the first rack (18) and the second rack (19). A limit slot (20) is provided on one side of the top of the second rack (19). One end of the second pressure plate (17) is located in the limit slot (20). A fixed support frame (2) is installed on the top of the workbench (1). A storage box (3) is provided above the fixed support frame (2). A conveying pipe (8) and a discharge pipe (9) are provided at the bottom of the storage box (3). A nozzle is provided in the discharge pipe (9). The discharge pipe (9) is located above the carbon film resistor body (10).

2. The coating device for carbon film resistors with a positioning mechanism according to claim 1, characterized in that: The workbench (1) has a cavity inside, and the bottom of the workbench (1) is connected to an air inlet pipe (13). The top of the workbench (1) has multiple sets of exhaust ports (11) used in conjunction with the air inlet pipe (13). The exhaust ports (11) are located below the discharge pipe (9), and the carbon film resistor body (10) is located above the exhaust ports (11).

3. A coating device for carbon film resistors with a positioning mechanism according to claim 2, characterized in that: The limiting block (22) has a semi-arc structure, and the fixing block (12) has an active groove for use with the first pressure plate (16).

4. A coating device for carbon film resistors with a positioning mechanism according to claim 3, characterized in that: The inner surfaces of the first pressure plate (16) and the second pressure plate (17) are provided with rubber pads, and the bottom of the workbench (1) is provided with multiple sets of support legs.

5. A coating device for carbon film resistors with a positioning mechanism according to claim 4, characterized in that: The workbench (1) has a first groove (7) on both sides of the top for use with the movable block (4), and the fixed plate (6) has a second groove (21) for use with the first rack (18) and the second pressure plate (17).

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