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Compound type TPE extrusion foaming forming process

A technology of extrusion foaming and molding process, applied in the field of foaming process equipment, can solve the problems of high TPE weight, low elasticity, poor touch, etc., and achieve the effect of avoiding thermal decomposition and high-quality production

Inactive Publication Date: 2019-09-06
宁波邦泰汽车配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a composite TPE extrusion foaming molding process to solve the existing problems of high TPE weight, low elasticity, poor touch, and air marks on the surface that are not smooth enough.

Method used

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Embodiment

[0015] The invention provides a composite TPE extrusion foaming molding process to solve the problems of bulky and bulky TPE foaming equipment, high energy consumption, many people employed and low production capacity.

[0016] A composite TPE extrusion foam molding process, TPE is heated and melted, extruded, and the TPE and the mixture are extruded, foamed and formed through a die; the die extrusion step includes thermoplastic polyester, lubricant and foam The foaming aid is added into a twin-screw extruder and melted, and the outlet pressure of the twin-screw extruder is 3MPa~10MPa;

[0017] A physical foaming agent is passed into the thermoplastic polyester melt in the twin-screw extruder, and after mixing, the melt is pumped into the single-screw extruder, and the inlet pressure of the single-screw extruder is 15MPa ~25MPa;

[0018] The temperature of the thermoplastic polyester melt containing the physical foaming agent is lowered by the single-screw extruder, extruded ...

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Abstract

The invention provides a compound type TPE extrusion foaming forming process. TPE is molten through heating and extruded, and the TPE and a mixture are extruded through a mould, foamed and formed; themould extrusion step involves that thermoplastic polyesters, a lubricant and a foaming auxiliary are added into a double-screw extruder for melting, wherein the pressure of an outlet of the double-screw extruder is 3-10 MPa. The compound type TPE extrusion foaming forming process has the advantages that the pressure of the outlet of the double-screw extruder and the pressure of an inlet of a single-screw extruder are controlled to avoid the thermolysis of the TPE in the double-screw extruder and ensure that the pressure of a machine head meets the foaming requirement, thereby achieving the efficient, stable and high-quality production of TPE foaming forming.

Description

technical field [0001] The invention belongs to the technical field of foaming process equipment, and in particular relates to a composite TPE extrusion foaming molding process. Background technique [0002] In the foam molding process or foamed polymer material, a cellular or porous structure is formed through the addition and reaction of physical or chemical blowing agents. The basic steps of foam molding are the formation of nuclei, the growth or expansion of nuclei, and the stabilization of nuclei. [0003] The existing technology is to connect the equipment for producing supercritical fluid to the material pipe of the injection molding machine or the extruder, inject the supercritical fluid into the material pipe of the injection molding machine or the extruder and mix it with the polymer material in the material pipe, Then, the polymer molten plastic mixed with supercritical fluid is injected into a plastic mold for injection molding or extrusion molding to obtain lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12B29C44/50B29C44/34C08L67/00
CPCB29C44/3442B29C44/50C08J9/12C08J2201/03C08J2367/00
Inventor 孙才根陈兴妹孙玲颖
Owner 宁波邦泰汽车配件有限公司
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