Threaded core pulling device with automatically reset thread starting point

Abstract

The invention provides a threaded core pulling device with an automatically reset thread starting point, comprising a screw rod (1), a threaded mold core (11), a B gear (2), a nut sleeve (3), a transmission gear (4), an A gear (41), a rack (5), a limit block (51), a reset travel switch (6), a removing travel switch (7) and an oil cylinder (8). When the threaded core pulling device demolds, the oil cylinder drives the rack, the rack drives the A gear and drives the coaxial transmission gear to rotate, and the transmission gear drives the screw rod to rotate through the B gear so that the threaded mold core rotates, loosens and remove a core from a product; and when the threaded core pulling device is reset, the oil cylinder drives the rack to retract, the limit block arranged on the rack triggers the reset travel switch to stop the oil cylinder, and the threaded mold core automatically resets. According to the threaded core pulling device with the automatically reset thread starting point, disclosed by the invention, the thread starting point is located and can automatically reset by regulating the reset travel switch so that the purposes of reducing labors, improving efficiency and yield and being suitable for large-scale production are realized during injection molding production of thread injection molds.

Description

technical field [0001] The invention relates to a thread core-pulling device for an injection mold, in particular to a thread core-pulling device for automatically resetting the thread starting point of a thread injection mold for injection-molded thread products whose thread starting point requires positioning. Background technique [0002] Screw-type injection molded products with high requirements must adopt spiral demoulding, which usually uses a motor or oil motor located outside the mold to drive the threaded rotating core inside the mold to rotate axially through a reduction transmission device, and the screw thread injection molding products. After demolding, the orientation of the thread starting point of the thread rotating core is arbitrary. In order to ensure the consistency of the thread starting point of injection molded products, it is necessary to reset the thread starting point of the thread rotating core before each mold closing. The reset of the starting ...

AI Technical Summary

Problems solved by technology

The manual reset method has low efficiency and human negligence. If the mold is closed without reset, waste products will be generated. In addition, there must be someone on duty during production and the workload is heavy, which is not suitable for the large-scale production requirements of unattended one person and multiple machines.

Therefore, there are problems and deficiencies in the prior art such as large workload, low production efficiency, easy waste products, and inability to meet the requirements of large-scale production.

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