| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing an injection sleeve which has composite structure consisting of two layers, internal and external layers, and in which chipping is hardly generated at the tip part connected to the back of a mold. SOLUTION: An outer cylinder 1 is composed of carbon steel; a first part 21 of an inner cylinder is composed of a nickel alloy consisting of 4.3 wt.% Si, 21 wt.% Mo, 3.0 wt.% B, and the remainder Ni; and a second part 22 of the inner cylinder is composed of a nickel alloy consisting of 5.5 wt.% Si, 11 wt.% Mo, 1.8 wt.% B, and the remainder Ni. In the annular gap between a corresponding outer cylinder part 1a and a core 3, a second sintering raw material powder 22a is filled up to the predetermined height, and later, on the top of that, a first sintering raw material powder 21a is filled up. A hot isostatic pressing device is used to heat and pressurize them, so that the first and the second sintering raw material powders are sintered to join each other and, at the same time, joined with the corresponding outer cylinder part. COPYRIGHT: (C)2011,JPO&INPIT |
