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Forming process for combining polylaurolactam (PA) 6/PA6T alloy and metal insert

A metal insert and molding technology, applied in the direction of coating, can solve the problem of easy falling off of metal inserts and plastic parts under force, and achieve the effect of stable plastic-steel combination

Active Publication Date: 2015-06-03
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a molding process combining PA6 / PA6T alloy and metal inserts, which can solve the problem that the metal inserts and plastic parts are easy to fall off after being formed.

Method used

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  • Forming process for combining polylaurolactam (PA) 6/PA6T alloy and metal insert
  • Forming process for combining polylaurolactam (PA) 6/PA6T alloy and metal insert
  • Forming process for combining polylaurolactam (PA) 6/PA6T alloy and metal insert

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Embodiment Construction

[0020] The present invention will be further described below through specific embodiments. The following examples are preferred implementation forms of the present invention, but the implementation manners of the present invention are not limited by the following examples.

[0021] The plastic-steel joint surface of the present invention is a semicircular joint, the radius R of the metal insert is 57mm, and the height is 102mm, and the outer radius R of the plastic part is 110mm, and the height is 88mm. Before injection molding, the surface of the P20 metal insert with a surface roughness of Ra0.05 is cleaned, and the metal insert is placed in a high-temperature oven for heating. The temperature of the metal insert is controlled, and the surface temperature of the metal insert is shown in Table 1; when the preheated metal insert is put into the mold for injection molding, the surface of the metal insert is in surface contact with the temperature sensor installed in the mold. T...

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Abstract

The invention discloses a forming process for combining polylaurolactam (PA) 6 / PA6T alloy and a metal insert. The process comprises the following steps of: before injection moulding, preheating the metal insert to ensure that the surface temperature of the metal insert reaches 280 to 350 DEG C; 2) placing the pre-heated metal insert into a mould and performing injection moulding, wherein the temperature of the PA6 / PA6T material is 280 to 350 DEG C; and 3) maintaining pressure and cooling, and demoulding. By the process, the problems that the metal insert and a plastic and steel combination piece are stressed to be separated from each other easily after forming of the plastic and steel combination piece due to too large internal stress produced at the periphery of the metal insert during forming can be solved.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and in particular relates to a forming process combining PA6 / PA6T alloys and metal inserts. Background technique [0002] PA6, the polyamide 6, has the most excellent mechanical strength, stiffness, toughness, mechanical shock absorption and wear resistance. PA6T is a modified polyamide based on terephthalic acid, adipic acid and hexamethylenediamine. High quality nylon 6T, its melting point is as high as 310 ℃. The main characteristics of PA6T are excellent high temperature rigidity, dimensional stability and chemical resistance. Melt blend PA6 and PA6T, extrude and granulate to obtain PA6 / PA6T alloy. Excellent properties make PA6 / PA6T alloys widely used in many fields including auto parts, mechanical parts and electrical / electronic parts. [0003] Over the years, the plastic-steel combination process has been in use, including adding metal inserts in the injection moldin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/14B29C45/76B29K77/00
Inventor 蒋贤志蔡彤旻宁凯军王大中叶南飚陈大华关安南
Owner KINGFA SCI & TECH CO LTD