Title:
【発明の名称】消失発泡材型の成形用ダイ部材
Document Type and Number:
Japanese Patent JP2795461
Kind Code:
B2
Abstract:
A die member for forming a foam pattern for casting a cylinder block in a lost foam casting process, the pattern having a cylindrical bore with an axis, and a helical transfer passage including a first portion permitting die member separation in a direction along the axis of the cylindrical bore and an undercut portion preventing one-piece die member separation in the direction along the axis of the cylindrical bore, the die member comprising a main portion forming at least a portion of the cylindrical bore and including a projection forming a first part of the first portion of the transfer passage, and a core carried by the main portion and movable relative to the main portion along a line in a plane substantially perpendicular to the axis of the cylindrical bore, the core being movable between an extended position in which the core forms a second part of the first portion of the transfer passage and the undercut portion of the transfer passage, and a retracted position in which the core affords separation of the core through the second part of the first portion of the transfer passage and in common with separation of the projection from the first portion of the transfer passage in the direction along the axis of the cylindrical bore.
Inventors:
RATSUSERU JEI UANRENZU
Application Number:
JP14096289A
Publication Date:
September 10, 1998
Filing Date:
June 02, 1989
Export Citation:
Assignee:
AUTOBOODO MAARIN CORP
International Classes:
B22C7/02; B29C33/42; B29C39/26; F02B75/22; F02F1/22; B29K105/04; F02B75/02; (IPC1-7): B22C7/02; B29C39/26
Attorney, Agent or Firm:
Jun Tsuda (3 others)