| 摘要 |
PROBLEM TO BE SOLVED: To surely prevent occurrence of a weld line on a design surface of a molded article. SOLUTION: A plurality of gates 22x are so formed as to face a cavity C which is formed by clamping a movable half 3 to a fixed half 2, while a plurality of runners 23b and 23c communicating respectively with the gates 22x are formed, and a telescopic pin which is made to communicate with a sprue 24a and wherein a plurality of branch passages 26b and 26c capable of communicating respectively with the runners 23b and 23c are formed is provided slidably by the medium of a hydraulic cylinder 25. In gearing with operations of extension and contraction of the hydraulic cylinder 25, each of the branch passages 26b and 26c of the telescopic pin 26 is made to communicate selectively with each of the runners 23b and 23c, and thereby a molten resin supplied to the sprue 24a is injected and filled in the cavity C from each of the branch passages 26b and 26c of the pin 26 through each of the runners 23b and 23c and each of the gates 22x corresponding thereto.
|
