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Molding process for combination of PA6/PA66 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: 2015-07-01
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 / PA66 alloy and metal inserts, which can solve the problem that the metal inserts and plastic parts are easy to fall off after being formed.

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  • Molding process for combination of PA6/PA66 alloy and metal insert
  • Molding process for combination of PA6/PA66 alloy and metal insert
  • Molding process for combination of PA6/PA66 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 50mm, and the height is 90mm, and the outer radius R of the plastic part is 90mm, and the height is 60mm. 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. Thr...

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Abstract

The present invention discloses a molding process for combination of a PA6 / PA66 alloy and a metal insert. The molding process comprises the following steps: 1) before injection molding, carrying out a preheating treatment on a metal insert, such that the surface temperature of the metal insert is 230-340 DEG C; 2) placing the preheated metal insert in a mold to carry out injection molding, wherein the temperature of a PA6 / PA66 material is 230-340 DEG C; and 3) holding the pressure, cooling, and demoulding. In the prior art, after the plastic-steel combination part is molded, the metal insert and the plastic part are easily peeled after force applying, and the reason is the large internal stress generated around the metal insert during molding. With the molding process of the present invention, the problem in the prior art is 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 / PA66 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. PA66 is also called nylon 66, polyhexamethylene adipamide, which has excellent wear resistance Non-toxic, self-lubricating, high mechanical strength, PA6 / PA66 alloy is obtained by melt blending PA6 and PA66, extruding and granulating. Excellent properties make PA6 / PA66 alloys widely used in the automotive industry, instrument housings and other products that require impact resistance and high strength. [0003] Over the years, the plastic-steel combination process has been in use, including adding metal inserts in the injection molding process, and plastics for metal insert heating and pressing. Due to the variety of co...

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