| 摘要 |
PURPOSE: An injection mold for molding a screw thread is provided to offset the danger due to the deviation of time separating an injection molded product from a rotary core while a driving block is lifted with respect to an intermediate block. CONSTITUTION: An injection mold for molding a screw thread comprises a first mold(110), a second mold(120), a rotary unit(170), and a driving unit(180). The rotary unit includes a rotary rod(171), a rotary main body(172), and a rotary core(175). The second mold includes a fixed block(151), a mill plate block(141), an intermediate block, a driving block, a main elastic member(161), and an auxiliary elastic member(162). The main elastic member is installed between the driving block and the intermediate block and elastically biases the driving block, with respect to the intermediate block to the upper direction. The auxiliary elastic member is installed between the fixed block and the mill plate block and elastically biases the mill plate block, the intermediate block, and the driving block with respect to the fixed block to the upper direction. |
