Open pipe air-expansion thermoforming mold and process

Abstract

The invention discloses an open pipe air-expansion thermoforming mold and process. The mold comprises an upper mold assembly and a lower mold assembly, the upper mold assembly comprises an upper template and an upper mold base, the lower mold assembly comprises a lower template and a lower mold base, and a pipe end positioning sealing mechanism is arranged on the lower template; the pipe end positioning sealing mechanism comprises a shovel mouth forming male mold, a driving block and an oil cylinder, a cylinder body of the oil cylinder is mounted on the lower template, a piston rod of the oilcylinder is connected with the driving block, and the outer end of the shovel mouth forming male mold is connected to the driving block. The shovel mouth forming male mold can shovel out openings in the ends of pipe fittings after die assembly to ensure the shape and quality of the openings and protect to-be-formed parts of the pipe fittings; meanwhile, the shovel mouth forming male mold can sealpipe end shovel mouths, the problem that sealing is difficult in the open pipe fitting thermoforming process, the open pipe air-expansion thermoforming processing is achieved, open pipe fittings can also be prepared through the mold by means of the air-expansion thermoforming processing, the high-strength open pipe fittings can be obtained, and the processing efficiency of the open pipe fittings is improved.

Description

technical field [0001] The invention relates to an air-expanding thermoforming mold and a process for pipe fittings, in particular to an air-expanding thermoforming mold and a process for open pipe fittings, and belongs to the technical field of heat treatment plastic molding. Background technique [0002] With the gradual improvement of people's requirements for automobile safety, tubular parts have replaced sheet metal parts in some high-end automobiles. The forming process of these tubular parts is mostly cold stamping or cold roll forming at room temperature. However, due to the limitation of the pipe-making process and the mechanical properties of the material itself, the strength of the pipe fittings formed by cold stamping or cold roll forming is limited, so the heat treatment process of pipe fittings is developing rapidly. [0003] Most of the existing pipe fittings that are processed by inflatable thermoforming are non-open pipe fittings. There is no opening at both...

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Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides an open pipe fitting inflatable thermoforming mold and process, the pipe end of which can not only process a high-quality open structure, but also solves the problems of the existing open pipe fitting thermoforming process. Sealing problems, high-quality open pipe fittings made by the inflatable thermoforming process can

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