| 摘要 |
PROBLEM TO BE SOLVED: To nearly simultaneously fill a plurality of casting mold cavities with injected plastic material. SOLUTION: The relative dimensions of projection parts 52, 54 for forming the pawl tooth of a binding tool in the different casting mold cavities are ununiformly formed. Such casting mold parts are equipped as injected plastic material is fluidized through the different casting mold cavities at fluid speed so as to fill the casting mold cavities nearly simultaneously. Firstly, the dimensions of the projection parts 52, 54 are set more largely than the suitable dimension. After measuring the degree of filling the different cavities, such control is performed that the projection parts 52, 54 for at least one casting mold cavity become the suitable dimension. Further, such a control is performed that the projection parts 52, 56 for at least one casting mold cavity become dimensions AL, BL larger than a suitable dimension and on one side, the projection parts 52, 54 for at least other casting mold cavity become dimensions smaller than the suitable dimension. |
