Production method of seamless automobile door lock pull wire sheath

Abstract

The invention discloses a production process of a seamless vehicle door lock pull wire jacket. A polyurethane elastomer is molded as a cube or a cylinder; the position of a punching mold preset under a punching plate of a punching machine is adjusted; the polyurethane elastomer is positioned between the punching mold and the punching plate; the punching machine is started for punching; a punched outer peripheral remainder is stripped and stored; an inner peripheral remainder compressed in the punching mold is extracted to the external; the deformation of the inner peripheral remainder is eliminated; the inner peripheral remainder is punched by the punching mold to form at least one cylindrical strip; the cylindrical strip is extracted to the external from the inner peripheral remainder; the inner peripheral remainder is stored; the cylindrical strip is punched by the punching mold to slit as an annular strip and a remainder strip inserted in the annular strip; the remainder strip is extracted from the annular strip to form a finished rope sling; and the remainder strip is stored. The invention provides a high-efficiency and low-cost pull wire jacket industrial production mode, and promotes the advancement of related industries.

Description

technical field [0001] The present invention relates to a kind of production method of polyurethane sponge sheath, more specifically, it relates to a kind of production method of seamless automobile door lock pull wire sheath. Background technique [0002] Driven by technological innovation, dramatic changes have also taken place in the automotive sector. The efficiency of production, processing and assembly of auto parts is getting faster and faster, and it is gradually developing in the direction of humanization. The car door lock cable also plays an important role in the entire car assembly process. At present, general automobile door lock stay wire mainly comprises stay cable, noose. [0003] Among them, during the controlled lifting process of the cable, the cable will repeatedly rub against the outer wall, gradually cracking, or even breaking. Therefore, it is necessary to install a protective sleeve outside the cable, that is, the cable can effectively prevent the f...

AI Technical Summary

Problems solved by technology

On the one hand, once the bonded slit is heated above a certain temperature or exposed to fire, it is prone to heat remodeling, resulting in cracking of the bonded slit; Deformation occurs under force. When the force is too large or repeated, it will cause cracks at the slits, exposing the cable to the outside, and losing its function of protecting the cable.

[0007] Aiming at the defects of the seamed cable sheath, in the prior art, the polyurethane foaming method is used to complete the shaping during the foaming forming process, that is, it can be sold as a finished product after the foaming is completed, but the foaming process Yes, the ratio of chemical components is difficult to control accurately, the chemical reaction conditions are easy to fall, and polyurethane foaming is an unstable expansion process, all of which may directly or indirectly affect the quality of the finished product. The required noose needs to rely on other equipment or manual monitoring to solve the above problems one by one. For actual production, a certain cost needs to be invested

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