Synchronous automatic thread release mechanism for injection mold threads

Abstract

The invention discloses a synchronous automatic thread release mechanism for injection mold threads, which comprises a driving gear arranged on a center shaft which is connected with a power mechanism and a driving mechanism; a plurality of driven gears respectively arranged on a core with threads; a spring sleeved on the center shaft to applying an axial force to the driving gear during operation; also comprises a clutch assembly arranged on the center shaft and positioned between the driving gear and the spring, wherein matching clutch teeth with annular distribution, obliqueness of 45+ / -0.5 degrees and heat treated surfaces are respectively arranged on a combination surface of the clutch assembly and the driving gear. By using the clutch assembly, the core is easy to control in upward and downward travels, thereby being beneficial to accurately controlling the thread release allowance of the core, and then obtaining the good thread release effect.

Description

Technical field [0001] The invention relates to the technical field of injection mold manufacturing, in particular to an injection mold thread synchronous automatic threading mechanism. Background technique [0002] At present, the commonly used methods of unthreading for injection molding of threaded plastic products (such as bottle caps) are as follows: [0003] One is the manual threading method, that is, after the mold is opened, the product is manually unscrewed from the mold or movable insert. The disadvantage is that the labor intensity is high and the production efficiency is low; [0004] The second is the forced release method, that is, the injection molded part is forced out by the axial force of the ejector pin and the top plate, and its production efficiency is high, but it is easy to cause radial deformation of the thread and thread flanging; [0005] The third is the automatic thread unthreading method, that is, the motor or hydraulic motor drives the gear to automatica...

AI Technical Summary

Problems solved by technology

[0003] One is the manual unthreading method, that is, after the mold is opened, the product is unscrewed from the mold or the movable insert by hand. The disadvantage is that the labor intensity is high and the production efficiency is low;

[0004] The second is the forced release method, that is, the injection molded part is forcibly released by the axial force of the thimble and the top plate. The production efficiency is high, but it is easy to cause radial deformation of the thread and thread flanging;

[0005] The third is the automatic thread removal method, that is, the gear is driven by an electric motor or a hydraulic motor to automatically remove the thread. The disadvantage is that the control of the thread core in the upper and lower synchronous thread strokes is not easy to operate, especially the difficulty of controlling the number of revolutions of the core core. Large, that is, it is impossible to accurately control the thread removal allowance of the core, thus affecting the thread removal effect

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