Method for performing plastic welding through laser device

Abstract

The invention discloses a method for performing plastic welding through a laser device. The method for performing plastic welding through the laser device includes the following steps that a special jig is used for pressurizing a product shell portion needing to be welded so that the upper portion and the lower portion can be closely combined; the product tolerance is measured through an installing fixture; the laser device is used for emitting laser, and after the laser passes through a transmission layer of a product and performs dissolving on a material of an absorbing layer of the product,the laser is fused together with the transmission layer of the product; due to moving of a laser spot, welding is performed on the portion, needing to be welded, of the whole product; and the weldedproduct is measured, and bad products are unloaded or taken out. According to the method for performing plastic welding through the laser device, pressurizing is performed on the product before welding so that the problem that because of the tolerance of a mold, the close combination degree of the product before welding is not sufficient can be reduced, and a same pulse value or different pulse values are used for different materials; and finally, the product is welded through the laser, and meanwhile there is no strict requirements for whether plastics needing to be welded are in crystallinity or amorphism.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a plastic welding method using laser equipment. Background technique [0002] Take the sealing of the car camera shell as an example; most of the technologies currently used are ultrasonic welding, heat welding, screwing and glue curing. The quality requirements of the car camera module customer for the product are: zero welding failure rate; waterproof and dustproof, completely sealed; no appearance damage, no deformation; no burrs on the welding part; the welding point is inside the product; the internal pressure of the product does not change; 2D / 3D products can be welded. [0003] However, the current traditional ultrasonic welding, thermal welding, dispensing and other methods cannot fully meet the above product quality requirements. When the welding quality of the car camera shell is not good, it will directly or potentially lead to product failure and affect driving saf...

AI Technical Summary

Problems solved by technology

[0003] However, the current traditional ultrasonic welding, thermal welding, dispensing and other methods cannot fully meet the above product quality requirements

When the welding quality of the car camera shell is not good, it will directly or potentially lead to product failure and affect driving safety

At present, there are also a small number of laser welding equipment on the market, but the limitations on materials are very large, only certain types of plastic materials can be welded, and the laser absorbing layer of the product must be non-crystalline plastic before welding can be performed.

Images