| 摘要 |
PROBLEM TO BE SOLVED: To suppress variation in the filling speed of molten resin in a cavity and suppress generation of burr at an opening of a filter part.SOLUTION: Four gates 18 are provided along a peripheral direction of a cavity part 14 for an inner cylinder, on one end surface 14a of the cavity part 14 for an inner cylinder of an injection molding mold 10. In an X-Y plane orthogonal to a center axis 17 of the cavity part 14 for an inner cylinder, when a center line passing a center of the cavity part 14 for an inner cylinder and parallel to the X-axis is a first center line 20, and a center line passing the center of the cavity part 14 for an inner cylinder and parallel to the Y-axis is a second center line 21, the four gates 18 are arranged at an intermediate part of the first center line 20 and the second center line 21, and the gates are opened at positions where filling speed tends to be slow, on a cavity part 16 for a filter part, and the gates are not opened at positions where the filling speed tends to be fast on the cavity part 16 for a filter part.SELECTED DRAWING: Figure 2 |
