Resistance film spraying device for straight sliding type conductive plastic potentiometer

Abstract

A resistive film spraying device for a straight sliding type conductive plastic potentiometer comprises a rack, a clamping table and a spraying mechanism, the clamping table and the spraying mechanism are arranged on the rack, the clamping table is used for clamping a plastic substrate, and the spraying mechanism is located above the clamping table. The spraying mechanism comprises a spraying head and a mechanism used for installing the spraying head and enabling the spraying head to linearly move in the length direction of the clamping table, and the cleaning mechanism is arranged on the side of the clamping table and used for cleaning resistance liquid remaining on the spraying head after spraying is completed; the cleaning mechanism comprises a cleaning sponge and a cleaning fixing frame used for installing the cleaning sponge, and the cleaning sponge is located on the moving path of the spraying head. According to the utility model, the residual resistance paste on the spray head is erased, so that the problem that the resistance paste is dripped and exposed on the plastic substrate in the reset movement process of the spray head is avoided, and the reject ratio during the manufacturing of the resistance substrate is reduced.

Description

Technical Field

[0001] The utility model relates to a resistance diaphragm spraying device for a direct-slide conductive plastic potentiometer, belonging to the field of resistance diaphragm manufacturing. Background Art

[0002] A straight-slide conductive plastic potentiometer changes resistance by varying the length of the resistor. It primarily consists of a resistor, a brush, and terminals. When the input and output terminals of the potentiometer are connected to a circuit, current flows through the resistor, causing the brush to slide along the resistor, changing its position on the resistor and thus changing the resistance value. This is an example of the potentiometer described in Publication No. CN205943631U.

[0003] A resistor is a thin sheet structure, also known as a resistor diaphragm. It has a very thin resistive layer, often less than 0.2mm thick, on its surface. The resistor diaphragm is created by spraying a resistive liquid onto a plastic substrate. Controlled by a spray control system, the spray head sprays along the length of the plastic substrate at a preset speed, spraying rate, and spraying distance, forming the resistive layer. After spraying is complete, a robotic arm removes the resistor diaphragm and re-grabs a new plastic substrate. Once the plastic substrate is clamped, the spray head returns to its original path and moves to the starting spraying position.

[0004] However, after spraying is completed, some resistor liquid will remain on the spray head. During the reset process of the spray head, the residual resistor liquid on the spray head may drip onto the pre-clamped plastic substrate, increasing the defect rate during the spraying of the resistor film.

[0005] In addition, the spray head needs to wait until the resistor diaphragm is transferred away and a new plastic substrate is re-clamped before the next spraying operation can be carried out. The spraying efficiency is not very high and needs to be improved. Utility Model Content

[0006] In response to the deficiencies in the prior art, the present application provides a resistive diaphragm spraying device for a direct-slide conductive plastic potentiometer, which at least solves one of the technical problems.

[0007] A resistive diaphragm spraying device for a straight-sliding conductive plastic potentiometer comprises a frame, a clamping table and a spraying mechanism arranged on the frame. The clamping table is used to clamp a plastic substrate. The spraying mechanism is located above the clamping table. The spraying mechanism comprises a spray head and a linear movement mechanism for mounting the spray head and moving the spray head along the length direction of the clamping table. The spraying mechanism also comprises a cleaning mechanism, which is arranged on the side of the clamping table and is used to clean the resistive liquid remaining on the spray head after spraying is completed. The cleaning mechanism comprises a cleaning sponge and a cleaning fixing frame for mounting the cleaning sponge. The cleaning sponge is located on the moving path of the spray head.

[0008] Preferably, the cleaning fixture comprises a base plate and a mounting post provided on the upper surface of the base plate, wherein the mounting post has a vertically extending slot for mounting the cleaning sponge, and the slot extends upward to the upper surface of the mounting post.

[0009] Preferably, there are two cleaning sponges, a cleaning channel is formed between the two cleaning sponges, and the width of the cleaning channel is smaller than the diameter of the spray head.

[0010] Preferably, the upper surface of the bottom plate is further provided with a collecting groove facing the lower part of the cleaning sponge.

[0011] Preferably, the linear motion mechanism includes an electric cylinder 1, the electric cylinder 1 has a screw slider 1, and the spray head is fixedly connected to the screw slider 1.

[0012] Preferably, the number of the clamping platforms is two, and the two clamping platforms are parallel to each other;

[0013] The frame is provided with a switching structure connected to the electric cylinder 1 and used to switch the electric cylinder 1 to different clamping tables; the switching structure includes two symmetrically arranged electric cylinders 2, and the electric cylinder 2 has a screw slider 2. The moving direction of the screw slider 2 is perpendicular to the moving direction of the screw slider 1, and the two side ends of the electric cylinder 1 are respectively fixedly connected to the screw sliders 2 of the two electric cylinders 2.

[0014] Preferably, the table top of the clamping table is provided with a positioning groove matching the shape of the plastic substrate.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1: The utility model provides a cleaning mechanism on the side of the clamping table to wipe and absorb the resistance liquid remaining on the spray head, so that the problem of resistance liquid dripping onto the plastic substrate during the reset movement of the spray head can be reduced or even eliminated, thereby reducing the defective rate during the manufacture of the resistance film.

[0017] 2: The utility model is provided with two clamping tables and a switching structure. The switching structure is used to switch the spray head to the two clamping tables for spraying. Unlike the prior art, there is no need to wait for the sprayed plastic substrate to be removed and then re-clamp a new plastic substrate before spraying, which improves the spraying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the resistance liquid spraying device;

[0019] Figure 2 A top view of the cleaning fixture;

[0020] Figure 3 This is the position layout diagram of the two clamping tables and electric cylinder 1. DETAILED DESCRIPTION

[0021] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0022] Example:

[0023] like Figure 1-3 As shown, a resistive film spraying device for a direct-slide conductive plastic potentiometer comprises a frame 1, a clamping platform 2 mounted on the frame 1, and a spraying mechanism 3. The clamping platform 2 is used to clamp a plastic substrate 0. The spraying mechanism 3 is located above the clamping platform 2. The spraying mechanism 3 comprises a spray head 31 and a linear motion mechanism 32 for mounting the spray head 31 and moving it along the length of the clamping platform 2. During movement, the spray head 31 sprays resistive liquid onto the surface of the plastic substrate 0, thereby forming a resistive layer on the surface of the plastic substrate 0. The linear motion mechanism 32 specifically utilizes an electric cylinder 1, a mature product that integrates a servo motor 323 with a lead screw 322. The electric cylinder 1 converts the servo motor's rotational motion into linear motion. The electric cylinder 1 includes a lead screw slider 1 321 that cooperates with the lead screw 322. The spray head 31 is fixedly connected to the lead screw slider 1 321.

[0024] The resistor liquid spraying device also includes a cleaning mechanism 4, which includes a cleaning sponge 41 and a cleaning fixture 42 for mounting the cleaning sponge 41. The entire cleaning mechanism 4 is positioned to the side of the clamping table 2 to avoid interfering with the spraying process and ensure smooth spraying. The cleaning fixture 42 is fixedly connected to the frame 1, and the cleaning sponge 41 is positioned in the movement path of the spray head 31. The electric cylinder 1 is configured to continue moving the spray head 31 after the spray head 31 completes its spraying operation. After the spray head 31 moves to the side of the clamping table 2, it comes into contact with the cleaning sponge 41. As the spray head 31 moves over the cleaning sponge 41, any residual resistor liquid on the spray head 31 is wiped off and absorbed. This reduces or even eliminates the problem of resistor liquid dripping onto the plastic substrate during the repositioning of the spray head 31, thereby reducing the defect rate during resistor film manufacturing.

[0025] The cleaning fixing frame 42 includes a base plate 421 and a mounting post 422 arranged on the upper surface of the base plate 421. The base plate 421 can be connected to the frame 1 by welding. The mounting post 422 has a vertically extending slot 423 for mounting the cleaning sponge 41. The slot 423 extends upward to the upper surface of the mounting post 422. On the one hand, the slot 423 restricts the cleaning sponge 41 to prevent the cleaning sponge 41 from falling off, thereby ensuring the cleaning effect. At the same time, the slot 423 facilitates the replacement of the cleaning sponge 41. When replacing, the cleaning sponge 41 is directly taken out from the top of the slot 423, and a new cleaning sponge 41 is inserted from the top of the slot 423.

[0026] There are two cleaning sponges 41, and a cleaning channel is formed between the two cleaning sponges 41. The spray head 31 enters the cleaning channel when it moves. The width of the cleaning channel is smaller than the diameter of the spray head 31. The two cleaning sponges 41 clean the spray head 31 from both sides, thereby achieving better cleaning. The bottom plate 421 is provided with two mounting columns 422, which are used to mount the two cleaning sponges 41 respectively.

[0027] The upper surface of the bottom plate 421 is further provided with a collecting groove 424 facing the lower portion of the cleaning sponge 41 . The resistance liquid on the cleaning sponge 41 finally flows into the collecting groove 424 , which can be recycled and reused, and also reduces equipment pollution.

[0028] In the embodiment, there are two clamping tables 2, and the two clamping tables 2 are parallel to each other. At the same time, a switching structure is provided on the frame 1, which is connected to the electric cylinder 1 and is used to switch the electric cylinder 1 to different clamping tables 2. When the spray head 31 is spraying the plastic substrate 0 on one of the clamping tables 2, another plastic substrate 0 is clamped on the other clamping table 2. When the spray head 31 completes spraying, the switching structure switches the electric cylinder 1 to the other clamping table 2, so that the spray head 31 installed on the electric cylinder 1 is switched to the other clamping table 2, and the plastic substrate 0 on the other clamping table 2 is directly sprayed, without waiting for the sprayed plastic substrate 0 to be removed and then re-clamping a new plastic substrate 0 before spraying, thereby improving the spraying efficiency. The switching structure specifically includes two symmetrically arranged electric cylinders 51. The electric cylinder 51 is also a mature product. The electric cylinder 51 has a screw slider 511, a screw 512, and a servo motor 513. The moving direction of the screw slider 511 is perpendicular to the moving direction of the screw slider 1 321. The two side ends of the electric cylinder 1 are respectively fixedly connected to the screw slider 511 of the two electric cylinders 51.

[0029] In the case of using two clamping tables 2 , the number of cleaning mechanisms 4 is also two, and one cleaning mechanism 4 is correspondingly provided for each clamping table 2 .

[0030] The table top of the clamping table 2 is provided with a positioning groove 21 that matches the shape of the plastic substrate 0. The plastic substrate 0 is restricted when installed in the positioning groove 21. The plastic substrate 0 is grasped and released by a robot such as an electromagnetic adsorption structure. The electromagnetic adsorption structure is installed on a robot arm, and the robot arm transfers the plastic substrate 0.

[0031] The above embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements to the technical solution of the present invention made by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content sought to be protected by the present invention is fully set forth in the claims.

Claims

1. A film spraying device for a resistive film for a straight-sliding conductive plastic potentiometer, comprising a frame (1), a clamping platform (2) and a spraying mechanism (3) arranged on the frame (1), wherein the clamping platform (2) is used to clamp a plastic substrate, the spraying mechanism (3) is located above the clamping platform (2), the spraying mechanism (3) comprises a spraying head (31) and a linear movement mechanism (32) for mounting the spraying head (31) and moving the spraying head (31) along the length direction of the clamping platform (2), characterized in that: It also includes a cleaning mechanism (4), which is arranged on the side of the clamping table (2) and is used to clean the resistance liquid remaining on the spray head (31) after spraying is completed; the cleaning mechanism (4) includes a cleaning sponge (41) and a cleaning fixing frame (42) for mounting the cleaning sponge (41), and the cleaning sponge (41) is located on the moving path of the spray head (31).

2. The resistive film spraying device for a direct-sliding conductive plastic potentiometer according to claim 1, characterized in that: The cleaning fixed frame (42) comprises a bottom plate (421) and a mounting post (422) arranged on the upper surface of the bottom plate (421). The mounting post (422) has a vertically extending slot (423) for mounting the cleaning sponge (41). The slot (423) extends upward to the upper surface of the mounting post (422).

3. The resistive film spraying device for a direct-slide conductive plastic potentiometer according to claim 1, characterized in that: There are two cleaning sponges (41), and a cleaning channel is formed between the two cleaning sponges (41). The width of the cleaning channel is smaller than the diameter of the spray head (31).

4. The resistive film spraying device for a direct-sliding conductive plastic potentiometer according to claim 2, characterized in that: The upper surface of the bottom plate (421) is further provided with a collecting groove (424) facing the lower part of the cleaning sponge (41).

5. The resistive film spraying device for a direct-slide conductive plastic potentiometer according to claim 1, characterized in that: The linear motion mechanism (32) comprises an electric cylinder 1, the electric cylinder 1 having a screw slider 1 (321), and the spray head (31) is fixedly connected to the screw slider 1 (321).

6. The resistive film spraying device for a direct-sliding conductive plastic potentiometer according to claim 5, characterized in that: The number of the clamping platforms (2) is two, and the two clamping platforms (2) are parallel to each other; The frame (1) is provided with a switching structure connected to the electric cylinder 1 and used to switch the electric cylinder 1 to move to different clamping tables (2); the switching structure includes two symmetrically arranged electric cylinders 2 (51), the electric cylinder 2 (51) has a screw slider 2 (511), the moving direction of the screw slider 2 (511) is perpendicular to the moving direction of the screw slider 1 (321), and the two side ends of the electric cylinder 1 are respectively fixedly connected to the screw sliders 2 (511) of the two electric cylinders 2 (51).

7. The resistive film spraying device for a direct-slide conductive plastic potentiometer according to claim 1, characterized in that: The table top of the clamping table (2) is provided with a positioning groove (21) that matches the shape of the plastic substrate.

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