Etching machine for PCB (printed circuit board) of display screen

By linking the rotating nozzle with the hydraulic cylinder and using a self-cleaning device, the problems of uneven etching and nozzle clogging in wet etching equipment have been solved, achieving uniform etching and a long nozzle life, thus improving the manufacturing quality of the display PCB board.

CN121968466AInactive Publication Date: 2026-05-01SHANDONG CHUNGUANG OPTOELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG CHUNGUANG OPTOELECTRONICS CO LTD
Filing Date
2026-02-05
Publication Date
2026-05-01
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing wet etching equipment in the manufacturing of display PCB boards has the problem that the spray direction cannot adapt to changes in the substrate position, resulting in uneven etching, affecting the accuracy and consistency of circuit patterns, and the nozzle is prone to clogging, reducing product yield and performance reliability.

Method used

The system employs a rotating nozzle linked to a hydraulic cylinder to ensure that the spray direction of the liquid medicine and cleaning water maintains the optimal perpendicular angle with the plate surface. The flow of fluid is controlled by the staggered water inlet. Combined with a self-cleaning and drainage device, it achieves rapid response and automatic cleaning, preventing nozzle clogging.

Benefits of technology

It achieves uniform etching, eliminates uneven etching problems, extends nozzle life, and improves etching quality and equipment reliability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses an etching machine for a display screen PCB, and relates to the technical field of wet etching, the etching machine comprises a workbench, a rotating roller device, a first hydraulic cylinder, a second hydraulic cylinder, a motor, an air blowing fan and a rotating sprayer, the bottom of the inner wall of the workbench is provided with a water storage tank, the bottom of the water storage tank is provided with a water outlet, the rotating roller device is arranged on the inner wall of the workbench, and the rotating roller device is arranged on the inner wall of the workbench. The first hydraulic cylinder is fixedly installed on the outer wall of the workbench, the second hydraulic cylinder is fixedly installed on the outer wall of the workbench, and the control device is used for controlling whether the rotating spray head is communicated with the first hydraulic cylinder or not and arranged on the inner wall of the workbench and controls fluid to be connected or disconnected through mechanical coincidence and dislocation of through holes of the second water conveying opening and the first water conveying opening. Rapid and accurate response without an intermediate link is realized, and uneven etching caused by spraying angle deviation or valve delay is effectively eliminated.
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Citation Information

Patent Citations

  • A PCB etching machine

    CN111556661B