A kind of printing alignment method of annular printing screen

Abstract

The invention relates to a printing alignment method for a ring-shaped printing screen. The copper surface identification marks are designed at equal intervals on the product, and the identification marks are designed at the corresponding positions of the screen mesh of the ring-shaped screen. After calculation, the ring-shaped printing screen is corresponding to the product. Position set to align the camera. The position of the product identified by the two alignment cameras and the position of the identification mark on the screen are compared by computer, and the rotation speed of the ring printing screen, the horizontal angle of the ring printing screen and the position of the alignment roller are adjusted after calculation to solve the problem of printing. Alignment problem. An offset inspection camera is set at the position after the printing screen, and the offset inspection camera is used to check whether the printing accuracy of the ink meets the specification requirements. The beneficial effects of the invention are as follows: the ring printing screen printing ink can be performed at the same time as the alignment process, the printing accuracy is ensured and the production efficiency is greatly improved; an offset inspection camera is set after the printing position, and the good products in the printing process are obtained by calculation. Rate.

Description

technical field [0001] The invention relates to a printing alignment method for a ring-shaped printing screen, and belongs to the technical field of circuit board manufacturing. Background technique [0002] Because high-precision circuit board products have extremely high requirements on the accuracy and thickness of ink printing, the production equipment is complex, the process is difficult, and the production efficiency is low. It is a bottleneck process that restricts the production efficiency of high-precision circuit boards. The ring-shaped printing screen can greatly improve the production efficiency and reduce the difficulty of the process. However, due to the special structure of the ring-shaped printing screen, there is a problem of difficult printing alignment. During the printing alignment, an alignment camera is used to identify the tape-and-reel substrate. With the alignment mark on the printing screen, the distance that the printing screen needs to be adjusted...

AI Technical Summary

Problems solved by technology

[0002] High-precision circuit board products have extremely high requirements on the accuracy and thickness of ink printing, resulting in complex production equipment, difficult processes, and low production efficiency, which is the bottleneck process that restricts the production efficiency of high-precision circuit boards.

The ring-shaped printing screen concept can greatly improve production efficiency and reduce process difficulty, but due to the special structure of the ring-shaped printing screen, there is a problem of difficult printing alignment. During printing alignment, an alignment camera is used to identify the tape-type substrates separately. With the alignment mark on the printing screen, the distance that needs to be adjusted between the conveying direction and the product width direction of the printing screen is obtained through equipment calculation. After the movable screen platform drives the printing screen to adjust the corresponding position, the screen platform descends , the scraper moves and presses down the ink to complete a printing process, the screen platform rises, and the substrate is transported for a printing distance, and then the next alignment process is performed. Each printing process needs to be aligned one by one, which takes a long time and has low production efficiency.

In addition, the ink alignment of different products has different mark design positions, which increases the complexity of the design work and is not conducive to the specification and error prevention of product design.

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