THIN-WALLED INSERT-FORMED ARTICLE, THIN-WALLED CORED FORMED ARTICLE, FORMING METHOD, AND FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To continuously produce a largve number of thin-walled cored formed articles prevented from the filling failure of a material resin and the eccentricity of a hole. SOLUTION: A large number of the thin-walled cored formed articles are produced by successively performing a process (I) wherein an electrically conductive material continuing so as to be inserted into the cavity of a die is provided between the partition surfaces of the die, a process (II) wherein a resin is charged in the cavity while passing electric current through the electrically conductive material to heat the material to obtain an insert-molded article having the electrically conductive material incorporated therein, a process (III) wherein the die is opened not only to take out the insert-article to the outside of the die but also to move the continuing electrically conductive material to provide the rear part of a part where the insert-formed article is provided between the partition surfaces in the same way as the process (I) and a process (IV) wherein the elctrically conductive material is extracted from the thin-walled insert-formed article to form the hole. COPYRIGHT: (C)2004,JPO&NCIPI