Resistor coating machine

Abstract

The utility model discloses a resistance coating machine, which comprises a machine frame and a coating groove arranged on the machine frame, and is characterized by further comprising a coating supplementing device, a chuck lifting device, a control device and at least one liquid level detector, the coating supplementing device and the chuck lifting device are respectively arranged on the machine frame, and the liquid level detector is arranged on the machine frame. The discharging end of the coating supplementing device is communicated with the coating groove; the chuck lifting device is positioned above the coating groove; the liquid level detector is arranged at the upper part of the side wall of the coating tank; the signal output end of the liquid level detector is electrically connected with the corresponding signal input end of the control device, and the signal input ends of the coating supplementing device and the chuck lifting device are electrically connected with the corresponding signal output ends of the control device respectively. The resistor coating machine can be used for automatically coating each resistor on a resistor tape, and can ensure the immersion height consistency of the resistors.

Description

Technical Field

[0001] The utility model relates to resistor manufacturing equipment, in particular to a resistor coating machine. Background Art

[0002] During the manufacturing process of various resistors (such as thermistors, varistors, ceramic capacitors or film capacitors, etc.), due to the small size of a single resistor, after the chip and the lead are connected, it is usually necessary to use tape to attach the various resistors together on the same paper tape to form a strip of resistor strips for subsequent processing or testing. Since the chip in the resistor also needs to be packaged, for resistors suitable for wet encapsulation coating processes, multiple resistor strips are usually mounted on the product chuck, and then the product chuck is sunk into the paint tank to make the chip of the resistor soaked in the paint, thereby forming a shell on the outer surface of the chip. However, at present, when the paint is soaked, it is generally operated by manually holding the product chuck, so the immersion degree of the product chuck is usually not guaranteed, and the immersion degree is often too deep or too shallow. Too deep will cause the encapsulation foot length to exceed the standard, while too shallow will cause porcelain leakage, making it difficult to guarantee the quality of the resistor. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a resistor coating machine, which can automatically coat each resistor on a resistor belt and ensure the immersion height consistency of the resistor.

[0004] In order to solve the above technical problems, the technical solutions adopted are as follows:

[0005] A resistance coating machine includes a frame and a paint tank, which is installed on the frame. It is characterized in that it also includes a paint replenishing device, a chuck lifting device, a control device and at least one liquid level detector, the paint replenishing device and the chuck lifting device are respectively installed on the frame, and the discharge end of the paint replenishing device is connected to the paint tank; the chuck lifting device is above the paint tank; the liquid level detector is arranged on the upper part of the side wall of the paint tank; the signal output end of the liquid level detector is electrically connected to the signal input end corresponding to the control device, and the signal input ends of the paint replenishing device and the chuck lifting device are respectively electrically connected to the signal output ends corresponding to the control device.

[0006] In the above resistor coating machine, the product chuck with each resistor band is first transferred to the chuck lifting device; then, the chuck lifting device drives the product chuck to descend until the chips of each resistor in the resistor band on the product chuck are immersed in the paint tank; after the paint is immersed, the chuck lifting device drives the product chuck to rise again, at which time the product chuck can be sent out and replaced with a new product chuck to be immersed. At the same time, during the operation of the resistor coating machine, the liquid level detector can continuously detect the paint height in the paint tank and send the detection result to the control device. The control device controls the paint replenishing device to replenish the paint in the paint tank in time according to the liquid level height, so that the paint in the paint tank is maintained at a certain height, thereby ensuring that when the product chuck descends, the chips of the resistors can be completely immersed in the paint, and the resistor band will not be immersed insufficiently or too deeply.

[0007] In the preferred embodiment, the chuck lifting device includes a mounting platform, a lifting frame, a chuck hanging mechanism and a lifting drive mechanism capable of driving the lifting frame to lift. The mounting platform is fixedly mounted on the frame, the lifting drive mechanism is mounted on the mounting platform, the lifting frame is located above the coating tank, and the chuck hanging mechanism is mounted on the lifting frame; the signal input end of the lifting drive mechanism is electrically connected to the signal output end corresponding to the control device. When working, the chuck hanging mechanism first clamps the product chuck; then the lifting drive mechanism drives the product chuck to descend by driving the lifting frame to descend; finally, after the resistor in the resistance band is completely soaked, the lifting drive mechanism drives the lifting frame to rise again and waits for the next soaking.

[0008] In a further preferred embodiment, the chuck hanging mechanism includes two hanging plates, which are respectively mounted on the lifting frame and are symmetrically arranged on the left and right sides, and the lower end of the hanging plate on the left side is provided with a first hook portion facing the right side, and the lower end of the hanging plate on the right side is provided with a second hook portion facing the left side. Usually, the left and right sides of the product chuck are provided with engaging parts matching the first hook portion and the second hook portion. When the product chuck is hung on the chuck hanging mechanism, the first hook portion and the second hook portion respectively cooperate with the engaging parts of the product chuck to fix the product chuck on the hanging plate.

[0009] In a further preferred embodiment, the lifting drive mechanism includes a lifting motor and a plurality of lifting guide rails, the lifting motor is mounted on the mounting platform or the frame, the lifting guide rails are mounted on the mounting platform and arranged in the up-down direction, the lifting frame is arranged on the lifting guide rails so as to be movable up and down, and the lifting frame is connected to the power output shaft of the lifting motor by transmission. When the product chuck is lifted or lowered, the lifting motor drives the lifting frame to lift or lower along the lifting guide rails.

[0010] In a preferred embodiment, the paint replenishing device includes a paint replenishing barrel and a pump, the paint replenishing barrel and the pump are respectively mounted on the frame, the discharge port of the paint replenishing barrel is connected to the feed port of the pump, and the discharge port of the pump is connected to the feed port of the paint tank; the feed port of the paint tank is arranged at the bottom of the paint tank. When the paint in the paint tank is less, the control device controls the pump to extract a corresponding amount of paint from the paint replenishing barrel according to the liquid level and replenish the paint into the paint tank.

[0011] In a preferred embodiment, a stirrer is provided in the paint tank, and the stirrer can stir the paint in the paint tank.

[0012] In a preferred embodiment, the number of the liquid level detector is one.

[0013] In another preferred embodiment, the number of the liquid level detectors is multiple, each of which is disposed on the upper side wall of the paint tank and is disposed sequentially from top to bottom, and the signal output end of each liquid level detector is electrically connected to the corresponding signal input end of the control device. By providing multiple liquid level detectors, as the paint level in the paint tank gradually decreases (if the paint has not yet been replenished), the control device can control the degree of descent of the chuck lifting device according to the current liquid level to ensure that the resistor chip can be completely immersed in the paint.

[0014] The control device can be a single chip microcomputer or a microcomputer controller. The liquid level detector can be an existing structure.

[0015] The beneficial effect of the utility model is that the resistor coating machine can automatically coat each resistor on the resistor belt and can ensure the consistency of the immersion height of the resistor without the situation of insufficient immersion or too deep immersion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the resistance coating machine in Example 1 of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the chuck lifting device in Example 1 of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the product chuck in Example 1 of the utility model. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0020] Embodiment 1, as Figure 1-3A resistance coating machine shown in the figure includes a frame 1, a paint tank 2, a paint replenishing device 3, a chuck lifting device 4, a liquid level detector 5 and a control device 6, the paint tank 2, the paint replenishing device 3 and the chuck lifting device 4 are respectively installed on the frame 1, the discharge end of the paint replenishing device 3 is connected with the paint tank 2; the chuck lifting device 4 is above the paint tank 2; the liquid level detector 5 is arranged on the upper part of the side wall of the paint tank 2; the signal output end of the liquid level detector 5 is electrically connected to the signal input end corresponding to the control device 6, and the signal input ends of the paint replenishing device 3 and the chuck lifting device 4 are respectively electrically connected to the signal output ends corresponding to the control device 6.

[0021] In the above-mentioned resistor coating machine, firstly, the product chuck 7 (such as Figure 3 2) is transferred to the chuck lifting device 4; then, the chuck lifting device 4 drives the product chuck 7 to descend until the chips of each resistor in the resistor belt on the product chuck 7 are immersed in the paint tank 2; after the infiltration of the paint is completed, the chuck lifting device 4 drives the product chuck 7 to rise again, at which time the product chuck 7 can be sent out and replaced with a new product chuck 7 to be infiltrated. At the same time, during the operation of the resistor coating machine, the liquid level detector 5 can continuously detect the paint height in the paint tank 2 and send the detection result to the control device 6. The control device 6 controls the paint replenishing device 3 to replenish the paint in the paint tank 2 in time according to the liquid level height, so that the paint in the paint tank 2 is maintained at a certain height, thereby ensuring that when the product chuck 7 descends, the chips of the resistors can be completely immersed in the paint, and the resistor belt will not be immersed insufficiently or too deeply.

[0022] The chuck lifting device 4 includes a mounting platform 401, a lifting frame 402, a chuck hanging mechanism 403 and a lifting drive mechanism 404 capable of driving the lifting frame 402 to lift and lower. The mounting platform 401 is fixedly mounted on the frame 1, the lifting drive mechanism 404 is mounted on the mounting platform 401, the lifting frame 402 is located above the coating tank 2, and the chuck hanging mechanism 403 is mounted on the lifting frame 402; the signal input end of the lifting drive mechanism 404 is electrically connected to the corresponding signal output end of the control device 6. When working, the chuck hanging mechanism 403 first clamps the product chuck 7; then the lifting drive mechanism 404 drives the lifting frame 402 to descend, driving the product chuck 7 to descend; finally, after the resistor in the resistance band is completely soaked, the lifting drive mechanism 404 drives the lifting frame 402 to rise again, waiting for the next soaking.

[0023] The chuck hanging mechanism 403 includes two hanging plates 4031, which are respectively mounted on the lifting frame 402 and are symmetrically arranged on the left and right sides. The lower end of the hanging plate 4031 on the left side is provided with a first hook portion 40311 facing the right side, and the lower end of the hanging plate 4031 on the right side is provided with a second hook portion 40312 facing the left side. Usually, the left and right sides of the product chuck 7 are provided with engaging parts matching the first hook portion 40311 and the second hook portion 40312. When the product chuck 7 is hung on the chuck hanging mechanism 403, the first hook portion 40311 and the second hook portion 40312 respectively cooperate with the engaging parts of the product chuck 7 to fix the product chuck 7 on the hanging plate 4031.

[0024] The lifting drive mechanism 404 includes a lifting motor (not visible in the figure) and a plurality of lifting rails 4041. The lifting motor is mounted on the mounting platform 401 or the frame 1. The lifting rails 4041 are mounted on the mounting platform 401 and arranged in the up-down direction. The lifting frame 402 is arranged on the lifting rails 4041 so as to be movable up and down, and the lifting frame 402 is connected to the power output shaft of the lifting motor. When the product chuck 7 is lifted or lowered, the lifting motor drives the lifting frame 402 to lift or lower along the lifting rails 4041.

[0025] The paint replenishing device 3 includes a paint replenishing barrel 301 and a pump 302, which are respectively mounted on the frame 1, and the discharge port of the paint replenishing barrel 301 is connected to the feed port of the pump 302, and the discharge port of the pump 302 is connected to the feed port of the paint tank 2; the feed port of the paint tank 2 is arranged at the bottom of the paint tank 2. When the paint in the paint tank 2 is less, the control device 6 controls the pump 302 to extract a corresponding amount of paint from the paint replenishing barrel 301 according to the liquid level, and replenishes it into the paint tank 2.

[0026] A stirrer 201 is provided in the paint tank 2. The stirrer 201 can stir the paint in the paint tank 2.

[0027] The control device 6 is a microcomputer controller.

[0028] Embodiment 2, the difference between this embodiment and embodiment 1 is that: there are multiple liquid level detectors, each of which is respectively arranged on the upper part of the side wall of the paint tank, and is arranged sequentially from top to bottom, and the signal output end of each liquid level detector is respectively electrically connected to the corresponding signal input end of the control device. By setting multiple liquid level detectors, as the paint liquid level in the paint tank gradually decreases (when the paint has not yet been replenished), the control device can control the degree of descent of the chuck lifting device according to the current liquid level height to ensure that the resistor chip can be completely immersed in the paint.

Claims

1. A resistance coating machine, comprising a frame and a coating tank, wherein the coating tank is mounted on the frame, characterized in that: It also includes a paint replenishing device, a chuck lifting device, a control device and at least one liquid level detector, the paint replenishing device and the chuck lifting device are respectively installed on the frame, and the discharge end of the paint replenishing device is connected to the paint tank; the chuck lifting device is above the paint tank; the liquid level detector is arranged on the upper part of the side wall of the paint tank; the signal output end of the liquid level detector is electrically connected to the signal input end corresponding to the control device, and the signal input ends of the paint replenishing device and the chuck lifting device are respectively electrically connected to the signal output ends corresponding to the control device.

2. A resistor coating machine as claimed in claim 1, characterized in that: The chuck lifting device includes a mounting platform, a lifting frame, a chuck hanging mechanism and a lifting drive mechanism capable of driving the lifting frame to lift. The mounting platform is fixedly mounted on the frame, the lifting drive mechanism is mounted on the mounting platform, the lifting frame is located above the paint tank, and the chuck hanging mechanism is mounted on the lifting frame; a signal input end of the lifting drive mechanism is electrically connected to a signal output end corresponding to the control device.

3. A resistor coating machine as claimed in claim 2, characterized in that: The chuck hanging mechanism includes two hanging plates, which are respectively mounted on the lifting frame and arranged symmetrically on the left and right. The lower end of the hanging plate on the left is provided with a first hook portion facing the right, and the lower end of the hanging plate on the right is provided with a second hook portion facing the left.

4. A resistor coating machine as claimed in claim 2, characterized in that: The lifting drive mechanism includes a lifting motor and a plurality of lifting guide rails. The lifting motor is installed on the mounting platform or the frame. The lifting guide rails are respectively installed on the mounting platform and arranged in the up and down directions. The lifting frame is movably arranged on the lifting guide rails, and the lifting frame is drivingly connected to the power output shaft of the lifting motor.

5. A resistance coating machine as claimed in claim 1, characterized in that: The paint replenishing device includes a paint replenishing barrel and a suction pump, which are respectively installed on the frame. The discharge port of the paint replenishing barrel is connected to the feed port of the suction pump, and the discharge port of the suction pump is connected to the feed port of the paint tank; the feed port of the paint tank is arranged at the bottom of the paint tank.

6. A resistor coating machine as claimed in claim 1, characterized in that: A stirrer is arranged in the coating tank.

7. A resistor coating machine as claimed in claim 1, characterized in that: The number of the liquid level detector is one.

8. A resistance coating machine as claimed in claim 1, characterized in that: There are multiple liquid level detectors, each of which is arranged on the upper part of the side wall of the paint tank and arranged in sequence from top to bottom. The signal output end of each liquid level detector is electrically connected to the corresponding signal input end of the control device.

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