Capping plug injection mould and capping plug injection moulding method

Abstract

The invention discloses a capping plug injection mould and a capping plug injection moulding method. The capping plug injection mould comprises a lower mould base plate, bearing feet, a bearing plate, a mould core fixed plate, a Haff fixed plate, a small mould core fixed plate and an upper mould base plate from bottom to top. A Haff structure with a thread forming cavity is arranged in the Haff fixed plate and is composed of two pieces of Haff, and a mould core and a small mould core are correspondingly arranged. The mould further comprises a secondary push-off device composed of a first pushing rod fixed plate, a second pushing rod fixed plate, a third pushing rod fixed plate, a pushing rod, a conical pushing rod and a sprue puller, and a swing hook mechanism composed of a swing hook reset plate, a swing hook, a guide rod and a spring is arranged on the secondary push-off device. The injection moulding method comprises mould assembling, injection moulding, cooling, and mould opening ejection. According to the mould opening ejection step, secondary ejection is achieved under matching of the swing hook mechanism. According to the injection mould and the injection moulding method, the mould is simple, demoulding is easy, and injection moulding and mould opening can be achieved without a dedicated injection molding machine.

Description

Technical field [0001] The invention relates to a mold and an injection method for injecting cap plugs with external threads. Background technique [0002] In injection molding, for products with external or internal threads, molding and demolding are a major problem. For products with threads, currently there are rotatable cores with threaded cavities or cores with external threads to form, and use a transmission mechanism to drive the core to rotate to achieve demolding, although the mold with this structure is forming products When the threaded part is formed, the precision will be relatively high, but in the demolding process, it is easy to damage the formed threaded part, and the structure of the mold is complicated, and it is difficult to demold. At the same time, a special injection molding machine is required to drive the transmission. Mechanism to achieve demoulding action. Summary of the invention [0003] The purpose of the present invention is to provide an injection...

AI Technical Summary

Problems solved by technology

For products with threads, there are currently molded by a rotatable core with a threaded cavity or a core with external threads, and the core is driven to rotate by a transmission mechanism to achieve demoulding. When the thread part is molded, the precision of the thread part will be relatively high, but in the demoulding process, it is easy to damage the formed thread part, and the structure of the mold is complicated, and it is difficult to demould. At the same time, a special injection molding machine is needed to drive the transmission. Mechanism to realize the demoulding action

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