Shaped aluminum object for manufacturing integrally injection-molded aluminum/resin article, integrally injection-molded aluminum/resin article using same, and method for manufacturing shaped aluminum object and article

Abstract

Provided is a shaped aluminum object for manufacturing an integrally injection-molded aluminum / resin article, an integrally injection-molded aluminum / resin article using same, and a method for manufacturing the shaped aluminum object and the article, making it possible to effectively prevent dust from being generated on the surface of a shaped aluminum object and prevent a decrease in adhesive strength and airtightness near a resin gate on a resin joining surface between the shaped aluminum object and a resin molding. A shaped aluminum object, an integrally injection-molded aluminum / resin article using the object, and a method for manufacturing the shaped aluminum object, the shaped aluminum object having protrusions that extend in cornice shapes from depressions originating from asperities formed on a surface of the shaped aluminum object, wherein each observation cross-section (100-µm width) contains 150 to 800 observation lines passing from an empty space through aluminum and into another empty space on the basis of the protrusions when a plurality of observation lines that extend in the thickness direction of the shaped aluminum object from an empty space toward the asperities on the shaped aluminum object are drawn at a spacing of 0.1 µm from each other in a cross-section that extends in the thickness direction.

Description

technical field [0001] The present invention relates to a product with excellent adhesion strength and airtightness that can be used in a wide range of fields including various sensor parts for automobiles, various switch parts for home appliances, capacitor parts for various industrial equipment, etc. An aluminum-resin injection integral molded product made of an aluminum alloy, an aluminum-resin injection integral molded product using the same, and methods for producing the same. Background technique [0002] In the fields of various sensor parts for automobiles, various switch parts for home appliances, and capacitor parts for various industrial equipment, especially in the fields of automotive parts, etc., under severe environments such as temperature, humidity, and dust These sensor parts, switch parts, capacitor parts, etc. are used in many cases, and improvement of durability and heat resistance in such a severe environment, improvement of airtightness, etc. are becom...

AI Technical Summary

Problems solved by technology

[0005] However, in such an aluminum-resin integral injection molded product, the surface of the aluminum shape itself is exposed to the outside at a portion other than the resin bonding surface where the aluminum shape and the resin molded body are joined, and the exposed aluminum shape itself The surface of the aluminum body (hereinafter referred to as "the exposed surface of the aluminum shape") is formed with a plurality of concave-convex parts for forming concave parts. object) contact, the front end of the concave-convex part breaks as an aluminum piece and becomes dust, and the dust sometimes contaminates the surface of other objects, and such a problem also occurs when handling aluminum shapes such as aluminum shapes

In addition, if the resin joint surface of the aluminum molded body and the resin molded body are carefully observed, when a holding pressure is applied to prevent sink marks and warpage of the resin during resin injection molding, near the resin injection port (ゲート), a The uneven part of the surface of the aluminum shape is partially broken or crushed. This is considered to be caused by applying a holding pressure during the curing of the resin (in a state where the resin viscosity is high). As a result, the produced aluminum - In resin injection molded products, the adhesive strength and airtightness of the resin joint surface near the resin injection port during resin injection molding may decrease

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