| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding method for forming moldings with a hollow part using a single molding die in a short shot process of a gas assist method. SOLUTION: This molding die consists of molten resin injection parts 11, 12, a pressurized fluid injection part 21 and n-pieces of (N>=2) of cavity 30A-31F. Each of the cavities from a first cavity 30A to (N-1)th cavity 30F has upstream end parts 32A, 33A and downstream end parts 32B, 33B provided, and N-th cavity 31F has the upstream end part 33A provided. The upstream end part of the first cavity 30A communicates with the molten resin injection parts 11, 12 and the pressurized fluid injection part 21. In addition, the upstream end part of n-th (n=2, 3..., N) cavity communicates with the downstream end part of (n-1)th cavity through a gate part 34. |
