Process for once extrusion molding to make sheath

Abstract

A process for once extrusion molding to make a sheath comprises the following steps: preparing materials, to be more specific, preparing thermoplastic rubber TPV and polypropylene PP; extruding, to be more specific, using a main machine and a sub machine, putting the polypropylene PP into the main machine for baking for 2 hours at 80 DEG C, putting the TPV thermoplastic rubber material on the into the sub machine for baking for 2 hours at 80 DEG C, during the production, transferring the polypropylene PP in the main machine to a heating barrel to heat the PP polypropylene to the temperature of 180-190 DEG C, transferring the thermoplastic rubber TPV in the sub machine to a heating barrel to heat the TPV thermoplastic rubber is heated to 160-180 DEG C, after the heating is completed, conveying the two materials into a mold, then conveying the two materials by the mold to a molding die for molding; shaping and cooling to process a solidification shape; and cutting, to be more specific, cutting according to demands for using. The sheath is simpler in structure and easier in quality control.

Description

technical field [0001] The invention relates to a manufacturing process for a one-time extrusion molding sheath. Background technique [0002] At present, most of the sheaths are extruded samples of TPE or PP single material. Some of the sheaths made of a single material are too strong or too soft. If they are soft, the wiper is easy to fall off when the vehicle is running and wiping the rain. . However, if the strength is very strong, after the boneless wiper wears the shrapnel, it is easy to change the original curvature of the shrapnel, which will affect the rain wiping performance. Contents of the invention [0003] The purpose of the present invention is to provide a one-time extrusion molding sheath manufacturing process, which has a simpler sheath structure and easier quality control. [0004] Technical solutions adopted to achieve the above objectives, including steps; [0005] 1) Ingredients, thermoplastic rubber TPV and polypropylene PP; [0006] 2) Extrusion...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the sheaths are extruded samples of TPE or PP single material. Some of the sheaths made of a single material are too strong or too soft. If they are soft, the wiper is easy to fall off when the vehicle is running and wiping the rain.

If the strength is very strong, after the boneless wiper wears the shrapnel, it is easy to change the original radian of the shrapnel, which will affect the rain wiping performance

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