| 摘要 |
PROBLEM TO BE SOLVED: To suppress the flow irregularity of a resin before flowing into a cavity and to extremely simply optimize gate balance by providing protruding members capable of being increased, decreased and altered in the protruding length into respective runners in a mold clamping state to adjust flow resistance. SOLUTION: The resin flowing through a main runner 31a and a gate 32 is increased in flow resistance and the same state as an increase in the flow length of the resin is brought about. By adjusting the length of ejector pins 26, 28 herein, the flow length and flow pressure of the resin can be adjusted so as to become substantially equal to those of the resin flowing through other main runner 31a and other gate 32. Since the respective ejector pins 26, 28 are arranged at an equal distance from the center of a cavity A, the regulation quantities of flow resistance obtained by altering the protruding lengths of the ejector pins 26, 28 coincide. Therefore, flow resistance is easily regulated. |
