PRODUCTION OF CYLINDRICAL FORMED PRODUCT WITH DIE CASTING, APPARATUS THEREFOR AND CYLINDRICAL FRAME

摘要

PROBLEM TO BE SOLVED: To eliminate a draft attached to the inner peripheral surface of a cylindrical formed product. SOLUTION: In a fixed die 12 having a mandrel part 12a giving the draft, cooling parts 16a, 17a are disposed in two positions at the base end part side and the front end side of the mandrel part 12a. In these cooling parts, a setting temp. of the cooling part 16a at the base end part side of the mandrel 12a is set at higher than a setting temp. of the cooling part 17 at the front end part side and the cylindrical frame 14 (cylindrical formed product) is cast into a cavity between the fixed die 12 and a movable die 13 of a die casting machine.