Automatic cleaning mechanism for printed circuit boards

Abstract

The utility model discloses a kind of printing substrate automatic cleaning mechanism, install in printing substrate conveyer belt side edge, including unwinding assembly, winding assembly and sliding cleaning assembly, the automatic unwinding of adhesive tape is realized by unwinding roll and unwinding motor cooperation, the automatic winding of adhesive tape is realized by winding roll and winding motor, the sliding cleaning assembly has push cylinder, elastic roller group is installed in push cylinder telescopic end, adhesive tape is wound on winding roll after being led out by unwinding roll and passing through elastic roller group, the elastic roller group is attached printing substrate, and sliding cleaning is realized on the surface of printing substrate by push cylinder drive. The utility model realizes dirty automatic replacement by winding type adhesive tape, and overall attachment when cleaning is realized by sliding type cleaning mode cooperation elastic structure, improve cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of printed circuit board cleaning, and specifically to an automatic cleaning mechanism for printed circuit boards. Background Technology

[0002] Cleaning equipment is widely used in the printing industry. Cleaning the substrate during the printing process can improve the printing quality, reduce the damage to the screen by residual particulate matter on the substrate surface, and extend the life of the screen. The quality of printing is the core of the function of the printing machine. Cleaning the substrate at the source before printing plays a key role in improving the printing quality.

[0003] To address the issue of cleaning printed circuit boards, a patented dust removal device for printed circuit boards (application number: 201420786168.5) provides a cleaning structure that achieves rapid dust removal from printed circuit boards through the combined action of dust removal rollers and dust removal tape. While this method can remove dust from the board, it also has some drawbacks. Although the dust removal rollers can remove foreign objects from the board surface, their cleaning ability is limited. The outermost layer of tape needs to be removed manually periodically, and the dust removal rollers cannot ensure complete adhesion to the board, resulting in poor cleaning performance. Utility Model Content

[0004] To address the deficiencies and shortcomings of existing technologies, this utility model provides an automatic cleaning mechanism for printed circuit boards. The roll-up adhesive tape enables automatic replacement of dirt, and the sliding cleaning method combined with the elastic structure achieves full adhesion during cleaning, thereby improving the cleaning effect.

[0005] An automatic cleaning mechanism for printed circuit boards is installed on the side of a conveyor belt for printed circuit boards. It includes an unwinding assembly, a winding assembly, and a sliding cleaning assembly. The unwinding assembly automatically unwinds the tape through an unwinding roller and an unwinding motor. The winding assembly automatically winds the tape through a winding roller and a winding motor. The sliding cleaning assembly has a push cylinder and an elastic roller assembly installed at the extension end of the push cylinder. The tape led out by the unwinding roller passes around the elastic roller assembly and is wound onto the winding roller. The elastic roller assembly is in contact with the printed circuit board and is driven by the push cylinder to achieve sliding cleaning on the surface of the printed circuit board.

[0006] Preferably, the unwinding assembly includes a first back plate, an unwinding roller, an unwinding motor, an encoder, and multiple unwinding guide rollers. One end of the unwinding roller passes through the first back plate and is connected to the unwinding motor, which controls the rotation of the unwinding roller. The encoder is mounted on the unwinding motor. The multiple unwinding guide rollers are staggered above and to the side of the unwinding roller to guide and convey the tape drawn out by the unwinding roller.

[0007] Preferably, the winding assembly includes a second back plate, a winding roller, a winding drive, and a winding guide roller. One end of the winding roller passes through the second back plate and is connected to the winding drive, while the other end is suspended. The winding guide roller is located on the side of the winding roller, and guide tape is wound onto the winding roller.

[0008] Preferably, the elastic roller assembly includes a fixed plate, a roller mounting base, multiple rollers, and a return spring. The fixed plate is fixed to the extension end of the push cylinder, the multiple rollers are fixed to the lower end of the roller mounting base, and the upper end of the roller mounting base and the fixed plate are movably assembled by bolts and the return spring.

[0009] Preferably, the rollers are in three sets, arranged in an inverted triangle at the lower end of the roller mounting base. The tape wraps around the three sets of rollers in a U-shape, and the bottom roller works with the tape to clean the surface of the printed circuit board.

[0010] Preferably, the unwinding assembly further includes a photoelectric sensor facing the unwinding roller.

[0011] Beneficial effects: The automatic cleaning mechanism for printed circuit boards disclosed in this utility model has the following beneficial effects:

[0012] The three parts of winding, unwinding and pushing cleaning are all automated, which effectively improves the substrate cleaning efficiency and shortens the waiting time for cleaning the printed circuit board at the back end.

[0013] The automatic winding and unwinding settings enable automatic replacement of dirty tape, ensuring that each substrate cleaning uses clean tape, which effectively improves the cleaning effect compared to traditional reusable dust removal rollers.

[0014] Setting an encoder can control the unwinding length, thereby matching printed circuit boards of different sizes and improving the versatility of the mechanism;

[0015] The design of the return spring in the elastic roller assembly gives the rollers a certain elastic downward pressure, ensuring that the tape always moves in contact with the substrate surface during cleaning, further improving the cleaning effect. Attached Figure Description

[0016] Figure 1 The overall structure of this utility model embodiment Figure 1 ;

[0017] Figure 2 The overall structure of this utility model embodiment Figure 2 . Detailed Implementation

[0018] To further understand this utility model, preferred embodiments of this utility model are described below in conjunction with the accompanying drawings and examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the scope of the utility model claims.

[0019] The automatic cleaning mechanism for printed circuit boards disclosed in this utility model is installed on the side of a printed circuit board conveyor belt to clean the printed circuit boards on the conveyor belt. The specific structure is as follows: Figures 1-2 As shown, it includes an unwinding assembly 1, a winding assembly 2, and a sliding cleaning assembly 3. The unwinding assembly realizes the automatic unwinding of the tape 4, the winding assembly realizes the winding of the dirty tape, and the sliding cleaning assembly is located between the unwinding assembly and the winding assembly. The sliding cleaning assembly realizes the sliding cleaning of the tape on the printed circuit board below.

[0020] Specifically, the unwinding assembly includes a first back plate 11, an unwinding roller 12, an unwinding motor 13, an encoder 14, and multiple unwinding guide rollers 15. One end of the unwinding roller passes through the first back plate and is connected to the unwinding motor. The unwinding motor controls the rotation of the unwinding roller to achieve tape unwinding. The encoder is mounted on the unwinding motor. The unwinding motor controls the unwinding length according to the parameters set by the encoder to match the size of the corresponding printed circuit board. Multiple unwinding guide rollers are staggered above and to the side of the unwinding roller. The unwinding guide rollers located on the side guide the tape drawn out by the unwinding roller, while the two sets of unwinding guide rollers located above guide the tape to be conveyed horizontally backward.

[0021] The first backplate is also equipped with a photoelectric sensor 16 facing the unwinding roller to detect the amount of tape roll. When the tape is detected to be used up, a feedback signal is sent to remind the staff to replace the tape roll.

[0022] The winding assembly includes a second back plate 21, a winding roller 22, a winding motor 23, a clutch 24, and a winding guide roller 25. The winding motor and the clutch form a winding drive unit fixed on the reverse side of the second back plate. The winding motor is connected to one end of the clutch via a belt, and one end of the winding roller passes through the second back plate and is connected to the other end of the clutch. The winding electrode cooperates with the clutch to control the rotation of the winding roller. The winding guide roller is located on the side of the winding roller and guides the tape to be wound onto the winding roller. The winding guide roller and the unwinding guide roller located above the unwinding roller are arranged at the same height, so that the tape is horizontal between the winding assembly and the unwinding assembly, which facilitates subsequent sliding cleaning.

[0023] The sliding cleaning assembly includes a push cylinder 31 fixed on the second back plate, an elastic roller assembly 32 installed at the telescopic end of the push cylinder, and a tape led out by the unwind roller wraps around the elastic roller assembly and then onto the take-up roller. The elastic roller assembly is in contact with the printed substrate and is driven by the push cylinder to achieve sliding cleaning on the surface of the printed substrate.

[0024] The elastic roller assembly achieves elastic contact with the printed circuit board during cleaning. Its structure includes a fixed plate 321, a roller mounting base 322, multiple rollers 323, and a return spring 324. The fixed plate is fixed to the extension end of the push cylinder. The multiple rollers are fixed to the lower end of the roller mounting base. The upper end of the roller mounting base and the fixed plate are movably assembled by bolts and the return spring. Specifically, the bolts pass through the fixed plate and are screwed onto the roller mounting base with nuts. The return spring is fitted onto the bolts and located between the fixed plate and the roller mounting base. Under the elastic force of the return spring, the roller mounting base presses down on the printed circuit board below. Because the return spring is elastic, there is elastic contact between the rollers and the printed circuit board, which ensures the cleaning effect and avoids damage to the printed circuit board.

[0025] The rollers consist of three sets, arranged in an inverted triangle at the lower end of the roller mounting base. A horizontal tape between the unwinding roller and the take-up roller passes around the three sets of rollers in a U-shape. The bottom roller, in conjunction with the tape, can clean the surface of the printed circuit board. As the cylinder extends and retracts, the bottom roller also moves horizontally, thereby achieving sliding cleaning of the printed circuit board.

[0026] This invention enables automatic replacement of soiled tape through automatic winding and unwinding, ensuring that each substrate cleaning uses clean tape, thus effectively improving the cleaning effect compared to traditional reusable dust removal rollers.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the scope of the utility model's technical solution.

Claims

1. An automatic cleaning mechanism for printed circuit boards, installed on the side of a printed circuit board conveyor belt, characterized in that: The device includes an unwinding assembly, a winding assembly, and a sliding cleaning assembly. The unwinding assembly automatically unwinds the tape using an unwinding roller and an unwinding motor. The winding assembly automatically winds the tape using a winding roller and a winding motor. The sliding cleaning assembly has a push cylinder and an elastic roller assembly mounted on the extension end of the push cylinder. The tape led out by the unwinding roller passes around the elastic roller assembly and wraps around the winding roller. The elastic roller assembly is in contact with the printed circuit board and is driven by the push cylinder to achieve sliding cleaning on the surface of the printed circuit board.

2. The automatic cleaning mechanism for printed circuit boards according to claim 1, characterized in that: The unwinding assembly includes a first back plate, an unwinding roller, an unwinding motor, an encoder, and multiple unwinding guide rollers. One end of the unwinding roller passes through the first back plate and is connected to the unwinding motor, which controls the rotation of the unwinding roller. The encoder is mounted on the unwinding motor. The multiple unwinding guide rollers are staggered above and to the side of the unwinding roller to guide and convey the tape drawn out by the unwinding roller.

3. The automatic cleaning mechanism for printed circuit boards according to claim 1, characterized in that: The take-up assembly includes a second back plate, a take-up roller, a take-up drive, and a take-up guide roller. One end of the take-up roller passes through the second back plate and is connected to the take-up drive, while the other end is suspended. The take-up guide roller is located on the side of the take-up roller, and guide tape is wound onto the take-up roller.

4. The automatic cleaning mechanism for printed circuit boards according to claim 1, characterized in that: The elastic roller assembly includes a fixed plate, a roller mounting base, multiple rollers, and a return spring. The fixed plate is fixed to the extension end of the push cylinder, and the multiple rollers are fixed to the lower end of the roller mounting base. The upper end of the roller mounting base and the fixed plate are connected by bolts and the return spring to achieve movable assembly.

5. The automatic cleaning mechanism for printed circuit boards according to claim 1, characterized in that: The rollers consist of three sets, arranged in an inverted triangle at the lower end of the roller mounting base. The tape wraps around the three sets of rollers in a U-shape, and the bottom roller works with the tape to clean the surface of the printed circuit board.

6. The automatic cleaning mechanism for printed circuit boards according to claim 2, characterized in that: The unwinding assembly also includes a photoelectric sensor facing the unwinding roller.

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