| 摘要 |
PROBLEM TO BE SOLVED: To enable efficient molding of a non-foamed part and a foamed part in a state of being integrated and excellent in an external appearance, in injection molding using thermoplastic resin. SOLUTION: A movable half is divided into a main block 6, a mold block 7 for preparing a non-foamed part and a mold block 9 for preparing a foamed part and it is so constructed that these blocks can be driven to move forward and backward independently respectively. After resin 13 is filled in a cavity, first the mold block 7 for preparing the non-foamed part is made to advance into the cavity so as to enhance resin pressure and thereby mold transferability is improved, and then the mold block 9 for preparing the foamed part is made to withdraw so as to lower the resin pressure in the part. Thereby only this part is foamed. |
