Plastic product injection mold with automatic thread demoulding

Abstract

The invention discloses a plastic product injection mold with automatic thread demoulding. The plastic product injection mold comprises a mold core fixing plate, wherein a vertical step hole is formed in the middle of the mold core fixing plate, the upper part of a fixed mold core is fixed in the step hole, a convex circle is formed in the lower part of the fixed mold core, the middle part of the mobile mold plate is downward depressed to form a cylindrical groove, the wall of the groove and the outer surface of the convex circle are matched to form an injection cavity, the end surface, positioned at the outer ring of the groove, of the mobile mold plate and the end surface, positioned at the outer ring of the convex circle, of the mold core fixing plate are matched for sealing, a main runner hole is formed in the mobile mold plate, a thread mold core and a sleeve nut are arranged on the mobile mold plate along the radial direction of the groove, the inner end of the thread mold core extends in the injection cavity, the outer end of the thread mold core is in threaded connection with the sleeve nut, the sleeve nut is fixed on the mobile mold plate, a gear is fixedly arranged in the middle of the thread mold core, a vertical rack is fixed on the mold core fixing plate and extends into the mobile mold plate to be emptily sleeved by the mobile mold plate, the rack and the gear are meshed so that the thread mold core has both rotating degree of freedom and the radial moving degree of freedom.

Description

Technical field [0001] The invention relates to plastic processing technology, in particular to an injection mold for plastic products with automatic threading. Background technique [0002] Plastics include thermosetting plastics and thermoplastics. Commonly used methods for processing thermoplastics include extrusion, injection molding, calendering, blow molding, and thermoforming. The processing of thermosetting plastics generally adopts compression molding, transfer molding and injection molding. Injection molding, also known as injection molding, is a method of using an injection machine to quickly inject molten plastic into a mold and solidify to obtain various plastic products. At present, in order to facilitate the connection with other objects, threaded holes are often opened in plastic products. The difference from metal parts is that the threaded holes of plastic products are formed synchronously with plastic products. The problem is that: It is difficult to demold t...

AI Technical Summary

Problems solved by technology

At present, in order to facilitate connection with other objects, threaded holes are often provided in plastic products. Unlike metal parts, which are drilled first and then tapped, the threaded holes of plastic products are formed synchronously with the plastic products. The existing problems are, It is difficult to demould the threaded holes of plastic products, and the internal threads of the threaded holes are easily damaged

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