Automatic encapsulating device for piezoresistor

Abstract

The utility model relates to the technical field of electronic components, in particular to an automatic encapsulating device for a piezoresistor, which comprises an encapsulating workbench and an encapsulating conveying belt, an encapsulating powder dipping tank is arranged at the top of the encapsulating workbench, a moving track is arranged on one side of the top of the encapsulating powder dipping tank along the length direction, and a conveying support component is arranged on one side of the top of the moving track. A conveying belt automatic tightness adjusting assembly is arranged on the other side of the top of the moving track; the conveying belt automatic tightness adjusting assembly comprises a tightness driving adjusting assembly and a pressure sensing supporting assembly. The tightness of the conveying belt for conveying the piezoresistor can be automatically adjusted, the automation degree is high, it is ensured that the conveying belt for conveying the piezoresistor is in the optimal state, the running path of the conveying belt is accurately controlled, it is ensured that the piezoresistor can accurately fall into the encapsulation powder dipping tank, and the production efficiency is improved. And when the piezoresistor on the conveying belt passes through the encapsulation powder dipping tank, a good powder dipping effect can be ensured, and excessive resource waste can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to an automatic packaging device for a varistor. Background Art

[0002] Varistor, abbreviated as RTD, is an electronic component with unique properties, mainly used to convert the surface temperature change of an object into a measurable voltage signal output. Compared with traditional temperature-sensitive components such as thermistors and thermocouples, varistors have the advantages of fast response speed, high precision, and good repeatability, and are widely used in industrial automation, building intelligence, medical and other fields.

[0003] After the varistor is welded, it needs to be coated with a layer of epoxy resin powder on its surface to achieve moisture-proof, insulation and increase mechanical strength.

[0004] The process mainly includes: preheating - powder dipping - leveling - vulcanization - powder dipping - leveling - vulcanization - powder dipping - sol sequence, single-step operation is implemented, and the powder is transported to the inside of the powder dipping tank by a conveyor belt for dipping. The conveyor belt of the varistor on the top of the powder dipping tank cannot be well adjusted in tightness. If the conveyor belt is too loose, it is easy to cause the electronic and electrical components of the varistor to be dipped too deeply in powder, wasting raw materials. If the conveyor belt is too tight, it is easy to cause the electronic and electrical components of the varistor to be unable to be completely dipped in powder, resulting in powder dipping failure and low production efficiency of automatic adjustment. Utility Model Content

[0005] The purpose of the utility model is to provide a varistor automatic encapsulation device to solve the problems raised in the above background technology.

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

[0007] An automatic packaging device for varistor comprises a packaging workbench and a packaging conveyor belt, wherein a packaging powder dipping tank is arranged on the top of the packaging workbench, a movable track is arranged on one side of the top of the packaging powder dipping tank along the length direction, a conveying support component is arranged on one side of the top of the movable track, and a conveyor belt automatic tension adjustment component is arranged on the other side of the top of the movable track;

[0008] The automatic tension adjustment component of the conveyor belt includes a tension drive adjustment component and a pressure sensing support component, the tension drive adjustment component includes a screw rod, an adjustment slider, an adjustment motor and a controller, the screw rod is parallel to one side of the moving track, both ends of the screw rod are connected to the top of one side of the encapsulated powder immersion tank through a bearing seat, the adjustment slider is slidably located on the screw rod, the bottom of one side of the adjustment slider is slidably connected to the moving track, the adjustment motor is located at the top of the encapsulated powder immersion tank at one end of the screw rod, and one end of the screw rod passes through the bearing seat and is connected to the output end of the adjustment motor;

[0009] The pressure sensing support assembly includes a support plate, a conveying roller, a sensing rod and a guide roller. A sensing pressure plate is arranged parallel to the outer wall of one side of the sensing rod. The sensing pressure plate is an arc-shaped plate that is convex on the outside and concave on the inside. The inner walls at both ends of the sensing pressure plate are connected to the outer wall of the sensing rod through springs. A pressure sensor is arranged on the sensing rod located on one side of the inner wall of the sensing pressure plate.

[0010] As a preferred solution of the utility model, the bottom of the support plate is connected to the top of the adjusting slider, one end of the conveying roller passes through the support plate and is connected to a conveying motor, the guide roller is located on the support plate below the conveying roller, the sensing rod is located on the support plate on one side between the conveying roller and the guide roller, and the conveying roller, the sensing rod and the guide roller are distributed on the support plate in a triangular structure.

[0011] As a preferred solution of the utility model, the sensing pressure plate on the outer wall of the sensing rod is close to the outermost wall, and the pressure sensor is connected to the controller through a wire.

[0012] As a preferred solution of the utility model, the conveying support assembly includes a conveying slider and a conveying vertical plate, the conveying slider is slidably located on the movable track, the bottom of the conveying vertical plate is connected to the top of the conveying slider, and a supporting shaft rod is arranged on the conveying vertical plate. One end of the encapsulation conveyor belt passes through the supporting shaft rod, the conveying roller, the sensing rod and the guide roller in sequence, and passes through the encapsulation powder soaking tank and is connected to the external drying equipment.

[0013] As a preferred solution of the present utility model, the regulating motor is connected to the controller via a wire.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In view of the problems raised in the background technology, the present application can automatically adjust the tightness of the conveyor belt for conveying the varistor, with a high degree of automation, ensuring that the conveyor belt for conveying the varistor is in the best state. When the varistor on the conveyor belt passes through the encapsulated powder dipping tank, a good powder dipping effect can be ensured, and excessive waste of resources can be avoided.

[0016] Automatic tightness adjustment can make appropriate tightness adjustment according to actual conditions to ensure stable operation of the conveyor belt. The status of the conveyor belt is monitored in real time through the pressure sensor so that problems can be discovered and adjusted in time. According to the status of the conveyor belt, its tightness is automatically adjusted to keep it in the best working condition. The running path of the conveyor belt is accurately controlled to ensure that the varistor can accurately fall into the encapsulation powder dipping tank, ensuring that the varistor is encapsulated evenly and completely. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the overall axonometric drawing of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the pressure sensing support assembly of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the tension drive adjustment component of the utility model;

[0020] Figure 4 For this utility model Figure 1 Enlarged view of area A in the middle;

[0021] Figure 5 This is a side view of the sensing rod of the utility model.

[0022] In the figure: 1. Encapsulation workbench; 2. Encapsulation conveyor belt; 3. Encapsulation powder dipping tank; 31. Moving track; 32. Conveying support assembly; 321. Conveying slider; 322. Conveying vertical plate; 323. Support shaft; 33. Conveying belt automatic tension adjustment assembly; 331. Screw; 332. Adjustment slider; 333. Bearing seat; 334. Support plate; 335. Conveying roller; 3351. Conveying motor; 336. Induction rod; 3361. Induction pressure plate; 3362. Spring; 3363. Pressure sensor; 337. Guide roller. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention.

[0024] Example

[0025] Each device in this application document adopts a conventional model in the prior art, and the control method is to control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field, which belongs to the common knowledge in this field, so this application document will not explain it in detail.

[0026] See also Figure 1-5The utility model provides a technical solution: an automatic packaging device for varistor, including a packaging workbench 1 and a packaging conveyor belt 2, a packaging powder soaking tank 3 is arranged on the top of the packaging workbench 1, a moving track 31 is arranged on one side of the top of the packaging powder soaking tank 3 along the length direction, a conveying support component 32 is arranged on one side of the top of the moving track 31, and a conveyor belt automatic tension adjustment component 33 is arranged on the other side of the top of the moving track 31; the conveyor belt automatic tension adjustment component 33 includes a tension drive adjustment component and a pressure sensing support component, and the tension drive adjustment component includes It includes a screw rod 331, an adjusting slider 332, an adjusting motor and a controller. The screw rod 331 is located parallel to one side of the movable track 31. Both ends of the screw rod 331 are connected to the top of one side of the encapsulated powder soaking tank 3 through a bearing seat 333. The adjusting slider 332 is slidably located on the screw rod 331. The bottom of one side of the adjusting slider 332 is slidably connected to the movable track 31. The adjusting motor is located at one end of the screw rod 331 to encapsulate the top of the powder soaking tank 3. One end of the screw rod 331 passes through the bearing seat 333 and is connected to the output end of the adjusting motor. The adjusting motor is connected to the controller through a wire.

[0027] It should be noted that, in this embodiment, the encapsulation liquid inside the encapsulation powder soaking tank 3 is configured by dispersing the encapsulation material in water to obtain the encapsulation liquid, placing the varistor into the encapsulation liquid for soaking, and then drying and sintering to obtain the varistor containing the encapsulation layer; the dispersion method is stirring; the stirring temperature is 65°C to 80°C; the stirring time is 25min to 40min; the soaking time is 24min to 40min; the drying temperature is 60°C to 120°C;

[0028] By setting a tension driving adjustment component to drive the adjustment slider 332 on the moving track 31 to move, the conveyor belt is further driven to adjust the tension, so as to ensure that the conveyor belt for conveying the varistor is in the best state. When the varistor on the conveyor belt passes through the encapsulated powder dipping tank 3, a good powder dipping effect can be ensured, and excessive waste of resources can be avoided.

[0029] When the tightness of the conveyor belt conveying the varistor needs to be adjusted, the controller controls the adjusting motor to work, the adjusting motor rotates to drive the screw 331 to rotate, and further drives the adjusting slider 332 to move, and the conveying roller 335, the sensing rod 336 and the guide roller 337 on the top support plate 334 of the adjusting slider 332 follow the movement to tighten the conveyor belt conveying the varistor. When the pressure sensing support assembly senses that the tension of the conveyor belt conveying the varistor reaches the threshold, the controller controls the adjusting motor to stop and the adjustment is completed.

[0030] See also Figure 1 , 2, 4 and 5, the pressure sensing support assembly includes a support plate 334, a conveying roller 335, a sensing rod 336 and a guide roller 337, an induction pressure plate 3361 is arranged in parallel on the outer wall of one side of the sensing rod 336, the induction pressure plate 3361 is an arc-shaped plate convex on the outside and concave on the inside, the inner walls of both ends of the induction pressure plate 3361 are connected to the outer wall of the sensing rod 336 through springs 3362, and a pressure sensor 3363 is arranged on the sensing rod 336 located on one side of the inner wall of the induction pressure plate 3361; the bottom of the support plate 334 is connected to the top of the adjusting slider 332, one end of the conveying roller 335 passes through the support plate 334 and is connected to the conveying motor 3351, the guide roller 337 is located on the support plate 334 below the conveying roller 335, and the sensing rod 336 is located between the conveying roller 335 and the guide roller 337. On one side of the support plate 334 between the conveying rollers 337, the conveying roller 335, the sensing rod 336 and the guide roller 337 are distributed in a triangular structure on the support plate 334; the sensing pressure plate 3361 on the outer wall of the sensing rod 336 is close to the outermost wall, and the pressure sensor 3363 is connected to the controller through a wire; the conveying support assembly 32 includes a conveying slider 321 and a conveying vertical plate 322, the conveying slider 321 is slidably located on the movable track 31, the bottom of the conveying vertical plate 322 is connected to the top of the conveying slider 321, and a supporting shaft 323 is arranged on the conveying vertical plate 322, and one end of the encapsulation conveyor belt 2 passes through the supporting shaft 323, the conveying roller 335, the sensing rod 336 and the guide roller 337 in sequence, passes through the encapsulation powder soaking tank 3 and is connected to the external drying equipment.

[0031] It should be noted that, in this embodiment, the automatic tension adjustment can be appropriately adjusted according to the actual situation to ensure the stable operation of the conveyor belt. The state of the conveyor belt is monitored in real time by the pressure sensor 3363 so that problems can be discovered and adjusted in time. According to the state of the conveyor belt, its tightness is automatically adjusted to keep it in the best working state, and the running path of the conveyor belt is accurately controlled to ensure that the varistor can accurately fall into the encapsulation powder dipping tank 3, so as to ensure that the varistor is encapsulated evenly and completely;

[0032] Furthermore, the tightness of the conveyor belt conveying the varistor is automatically adjusted, with a high degree of automation, ensuring that the conveyor belt conveying the varistor is in the best state. When the varistor on the conveyor belt passes through the encapsulation powder dipping tank 3, a good powder dipping effect can be guaranteed, and excessive waste of resources can be avoided;

[0033] One end of the encapsulation conveyor belt 2 passes through the supporting shaft 323, the conveying roller 335, the sensing rod 336 and the guide roller 337 in sequence, passes through the encapsulation powder dipping tank 3 and is connected to the external drying equipment. During adjustment, the controller controls the adjusting motor to work, and the rotation of the adjusting motor drives the screw rod 331 to rotate, and further drives the adjusting slider 332 to move. The conveying roller 335, the sensing rod 336 and the guide roller 337 on the top support plate 334 of the adjusting slider 332 follow the movement, and the conveyor belt of the conveying varistor is tightened. The conveyor belt of the conveying varistor squeezes the sensing pressure plate 3361 on the sensing rod 336 to move, the spring 3362 is compressed, and the sensing pressure plate 3361 squeezes the pressure sensor 3363. When the pressure sensor 3363 is tightened to the threshold value, the controller controls the adjusting motor to stop and complete the adjustment. The structure is simple and the degree of automation is high, which ensures the encapsulation of the varistor.

[0034] The utility model workflow:

[0035] When in use, one end of the encapsulation conveyor belt 2 passes through the supporting shaft 323, the conveying roller 335, the sensing rod 336 and the guide roller 337 in sequence, passes through the encapsulation powder dipping tank 3 and is connected to the external drying equipment. When the controller receives the conveyor belt of the conveying varistor, the controller controls the adjusting motor to work, and the adjusting motor rotates to drive the screw rod 331 to rotate, and further drives the adjusting slider 332 to move. The conveying roller 335, the sensing rod 336 and the guide roller 337 on the top support plate 334 of the adjusting slider 332 follow the movement to tighten the conveyor belt of the conveying varistor. The conveyor belt of the conveying varistor squeezes the sensing pressure plate 3361 on the sensing rod 336 to move, the spring 3362 is compressed, and the sensing pressure plate 3361 squeezes the pressure sensor 3363. When the pressure sensor 3363 is tightened to the threshold value, the controller controls the adjusting motor to stop and complete the adjustment. The structure is simple and the degree of automation is high, which ensures the encapsulation of the varistor.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic packaging device for varistor, comprising a packaging workbench (1) and a packaging conveyor belt (2), characterized in that: The encapsulation workbench (1) is provided with an encapsulation powder soaking tank (3) on the top, a movable track (31) is provided along the length direction on one side of the top of the encapsulation powder soaking tank (3), a conveying support component (32) is provided on one side of the top of the movable track (31), and a conveyor belt automatic tension adjustment component (33) is provided on the other side of the top of the movable track (31); The conveyor belt automatic tension adjustment component (33) includes a tension drive adjustment component and a pressure sensing support component, the tension drive adjustment component includes a screw rod (331), an adjustment slider (332), an adjustment motor and a controller, the screw rod (331) is parallel to one side of the movable track (31), both ends of the screw rod (331) are connected to the top of one side of the encapsulated powder soaking tank (3) through a bearing seat (333), the adjustment slider (332) is slidably located on the screw rod (331), and the bottom of one side of the adjustment slider (332) is slidably connected to the movable track (31), the adjustment motor is located at the top of the encapsulated powder soaking tank (3) at one end of the screw rod (331), and one end of the screw rod (331) passes through the bearing seat (333) and is connected to the output end of the adjustment motor; The pressure sensing support assembly comprises a support plate (334), a conveying roller (335), a sensing rod (336) and a guide roller (337); a sensing pressure plate (3361) is arranged in parallel on the outer wall of one side of the sensing rod (336); the sensing pressure plate (3361) is an arc-shaped plate with a convex outer surface and a concave inner surface; the inner walls at both ends of the sensing pressure plate (3361) are connected to the outer wall of the sensing rod (336) through springs (3362); and a pressure sensor (3363) is arranged on the sensing rod (336) located on one side of the inner wall of the sensing pressure plate (3361).

2. The automatic packaging device for varistor according to claim 1, characterized in that: The bottom of the support plate (334) is connected to the top of the adjusting slider (332); one end of the conveying roller (335) passes through the support plate (334) and is connected to a conveying motor (3351); the guide roller (337) is located on the support plate (334) below the conveying roller (335); the sensing rod (336) is located on one side of the support plate (334) between the conveying roller (335) and the guide roller (337); the conveying roller (335), the sensing rod (336) and the guide roller (337) are distributed on the support plate (334) in a triangular structure.

3. The automatic packaging device for varistor according to claim 1, characterized in that: The sensing pressure plate (3361) on the outer wall of the sensing rod (336) is close to the outermost wall, and the pressure sensor (3363) is connected to the controller via a wire.

4. The automatic packaging device for varistor according to claim 1, characterized in that: The conveying support assembly (32) comprises a conveying slider (321) and a conveying vertical plate (322), wherein the conveying slider (321) is slidably located on the movable track (31), the bottom of the conveying vertical plate (322) is connected to the top of the conveying slider (321), and a supporting shaft (323) is arranged on the conveying vertical plate (322), and one end of the encapsulation conveyor belt (2) passes through the supporting shaft (323), the conveying roller (335), the sensing rod (336) and the guide roller (337) in sequence, passes through the encapsulation powder soaking tank (3) and is connected to an external drying device.

5. The automatic packaging device for varistor according to claim 1, characterized in that: The regulating motor is connected to the controller via a wire.

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