Injection mold that internal thread was moulded structure of loosing core

The utility model discloses an injection mold that internal thread was moulded structure of loosing core, including float type core, threaded core, locking screw and movable mould hole core, the float type core sets up in the threaded core, threaded core one end sets up on movable mould bottom plate through a centripetal thrust bearing, the threaded core other end sets up in the die cavity, wherein, movable mould hole core passes through locking screw connects, the last sprocket that is provided with of threaded core, the sprocket is connected with the external drive motor. The utility model discloses can accomplish the internal thread and mould the core pulling and demolding of piece, guarantee the internal thread and mould the quality of piece. 本实用新型公开了种内螺纹塑件的注塑模具抽芯结构，包括浮动型芯、螺纹型芯、锁紧螺杆以及动模内孔型芯，所述浮动型芯设置在所述螺纹型芯内，所述螺纹型芯端通过向心推力轴承设置在动模底板上，所述螺纹型芯另端设置在型腔内，所述浮动型芯与所述动模内孔型芯通过所述锁紧螺杆连接，所述螺纹型芯上设置有链轮，所述链轮与外部驱动电机连接。本实用新型能够完成内螺纹塑件的抽芯脱模，保证内螺纹塑件的质量。