A cold runner mold

Abstract

The invention relates to the technical field of cold runner molds, in particular to a cold runner mold, which includes an upper mold, a middle mold, a lower mold and a forward and reverse motor. There is a rod cavity at the bottom; an injection shaft is installed in the shaft hole, and a forward and reverse motor is fixed on the upper surface of the upper mold. The output shaft of the forward and reverse motor is connected to the injection shaft through a reversing gear set; There is a splitting cavity at the connection between the lower end surface of the upper mold and the upper end surface of the middle mold; a cold runner is set in the lower mold, and the injection hole, the splitting cavity and the cold runner are connected; a threaded rod is set in the lifting cavity, and the center of the bottom surface of the threaded rod Set a sealing rod; the lower end of the cold runner is a conical discharge chamber, the lower end of the sealing rod passes through the rod chamber and is placed in the conical discharge chamber, the upper end of the threaded rod and the middle of the injection shaft are provided with a transmission gear, which is connected by a transmission belt Injection shaft. The invention improves the controllability of rubber material injection and the uniformity of blanking, which is beneficial to reduce production costs and improve economic benefits of enterprises.

Description

technical field [0001] The invention relates to the technical field of cold runner molds, in particular to a cold runner mold. Background technique [0002] There is no cold runner designed in the mold of the traditional rubber injection machine. In a large-scale rubber product mold with multiple cavities or multiple nozzles, it is necessary to prepare complex runners to separate glue, so that each cavity or each section can be evenly fed with glue. After vulcanization and molding of such runners, the flow The rubber in the road is also vulcanized, which seriously causes waste of rubber material. Generally, the waste rubber accounts for more than 15%. The more mold cavities or nozzles, the higher the proportion of waste rubber, which can reach more than 30%, resulting in high production costs of rubber products. With the development of society and the progress of science and technology, the mold of this kind of rubber injection machine can no longer meet the needs of the i...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned shortcomings in the prior art, the present invention provides a cold runner mold, which can effectively overcome the difficulty in controlling the uniformity of rubber material blanking in the prior art, which leads to serious waste of rubber material in the mold of the rubber injection machine problems, effectively reduce the production cost of rubber products and improve economic benefits

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