EXTRUSION DIE FOR MANUFACTURING OF SEMI-HOLLOWED SHAPE MATERIAL,申请号JP20100154004-传众专利搜索

EXTRUSION DIE FOR MANUFACTURING OF SEMI-HOLLOWED SHAPE MATERIAL

申请公布号：JP2012016711(A)

申请号：JP20100154004

申请日期：2010.07.06

申请公布日期：2012.01.26

申请人：

SHOWA DENKO KK

发明人：TSUTSUI TOSHIMITSU;KUMAMOTO OSAMU;KITAMURA TAKAYA

分类号：B21C25/02

主分类号：B21C25/02

摘要：<P>PROBLEM TO BE SOLVED: To provide an extrusion die for the manufacturing of a semi-hollowed shape material capable of manufacturing the semi-hollowed shape material of high quality while securing sufficient durability. <P>SOLUTION: The extrusion die 1 includes: a die body 2, and a hole plate 5. The die body 2 has a molding hole 3, a tongue molding portion 22 and a tongue opening molding portion 23. The hole plate 5 has a metal-hole 55 communicating with a weld chamber 51 on the upstream side of the molding hole. In the weld chamber 51, a dummy molding portion 6 is provided on the hole plate 5 in conformation to the upstream side of the tongue molding portion 22 of the die body 2. A fitting recess 65 is formed at the downstream end surface of the dummy molding portion 6, and a fitting projection 25 is formed at the upstream end surface of the tongue molding portion 22. The fitting recess 65 and the fitting projection 25 are mutually fitted while leaving a gap. <P>COPYRIGHT: (C)2012,JPO&INPIT