INJECTION MOLDING DIE FOR MESH FILTER AND INJECTION MOLDING METHOD FOR MESH FILTER

摘要

[Problem] To limit variations in molten resin filling rate inside a cavity and limit the occurrence of burrs at the openings of the filter part. [Solution] Gates 18 are provided at four points along the circumferential direction of an inner cylinder cavity section 14 of an injection molding die 10 on one end face 14a of the inner cylinder cavity section 14. If, in an X-Y plane that is orthogonal to the central axis 17 of the inner cylinder cavity section 14, a central line passing through the center of the inner cylinder cavity section 14 and parallel to the X-axis is a first central line 20 and a central line passing through the center of the inner cylinder cavity section 14 and parallel to the Y-axis is a second central line 21, the gates 18 are disposed in areas that are between the first central line 20 and the second central line 21, and are configured to open at positions of the filter part cavity section 16 where filling rate tends to be slow and not to open at positions of the filter part cavity section 16 where filling rate tends to be fast.