Injection molding vacuum tank assembly processing and welding process for automobile braking system

Abstract

The invention discloses an injection molding vacuum tank assembly processing and welding process for an automobile braking system. The process particularly comprises the following steps: (1) injection-molding an upper cavity and a lower cavity; (2) deburring a sprue gate; (3) performing synchronous hot melting; and (4) closing cavities and welding, wherein in the third step of the step (3) of performing synchronous hot melting, the rotating speed of a synchronous melting device is 45 rpm; in the fourth step of the step (3) of performing synchronous hot melting, a hot gas welding switch and a hot plate welding switch are started simultaneously, the hot melting temperature of a melting strip of the upper cavity is 150 DEG C and the hot melting time of the melting strip of the upper cavity is 125 seconds, and the hot melting temperature of a melting strip of the lower cavity is 280 DEG C and the hot melting time of the melting strip of the lower cavity is 125 seconds; and a positioning groove and a limiting rod are arranged on an anti-misplacement limiting tool for the step (4) of closing cavities and welding, and the airtightness of the injection molding vacuum tank assembly is improved, so that the positive and negative pressure bearing capability of the injection molding vacuum tank assembly is improved, and the work safety and the stability of the braking system are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of automobile brake system accessories, in particular, the invention relates to a processing and welding process of an injection molding vacuum tank assembly for an automobile brake system. Background technique [0002] With the development of the automobile industry, the technology of the braking system has developed very mature. The safety and stability of the braking system has always been the most important criterion for measuring the braking system. The safety and stability of the braking system cannot be separated from the braking system. The quality of parts, there is a vacuum tank that provides positive and negative pressures in the booster function of the automobile brake system. The current method of combining the upper cavity and the lower cavity of the injection vacuum tank mainly adopts ultrasonic welding or hot plate welding. During the welding process, when ultrasonic energy is used to melt th...

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Problems solved by technology

[0002] With the development of the automobile industry, the technology of the braking system has developed very mature. The safety and stability of the braking system has always been the most important criterion for measuring the braking system. The safety and stability of the braking system cannot be separated from the braking system. The quality of parts, in the boost function of the automobile brake system, there is a vacuum tank that provides positive and negative pressure. The current method of combining the upper cavity and the lower cavity of the injection vacuum tank mainly adopts ultrasonic welding or hot plate welding. During the welding process, when ultrasonic energy is used to melt the interface between the upper and lower chambers of the vacuum tank, due to the influence of the structural shape of the upper and lower chambers of the vacuum tank, the ultrasonic waves in many places are lost, making the interface between the upper and lower chambers of the vacuum tank The degree of melting is uneven, which will cause air tightness defects after the upper cavity and the lower cavity are combined; in addition, both the upper cavity and the lower cavity are welded by hot plates, which will cause the melted engineering plastics on the upper cavity and the lower cavity to overflow to both sides , after the upper cavity and the lower cavity are combined, it will bring air tightness defects, and the welding bonding strength is low, and the ability to bear positive pressure is poor, which affects the safety and stability of the brake booster system

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