A Hot Runner System for Double-nozzle Laminated Mold

Abstract

The invention discloses a double-sprue hot runner system for a stack mold. The double-sprue hot runner system comprises: a first splitter plate provided with a first main runner and a first branch runner; a second splitter plate provided with a second main runner; a third splitter plate provided with a third main runner; and a fourth splitter plate provided with a fourth main runner and a second branch runner, wherein the first main runner and the first branch runner constitute a first glue supply passage for glue supply of a first cavity, and the second main runner, the third main runner andthe second branch runner constitute a second glue supply passage for glue supply of a second cavity. When a plastic product made of two or more materials is to be processed and molded, the two independent rubber supply passages of the double-sprue hot runner system can be connected with injection tables of two sets of injection molding machine via two sprues in a butt joint manner so as to realizerespective molding of the product made of two materials in two parting surfaces. Compared with traditional molds, the stack mold with the double-sprue hot runner system in the invention is substantially reduced in the frequency of mold cleaning caused by replacement of hot glue and is improved in production efficiency.

Description

technical field [0001] The invention relates to the technical field of injection molding, in particular to a hot runner system of a double-runner laminated mold. Background technique [0002] The laminated mold is a combination of two or more common hot runner injection molds, which are arranged in an overlapping manner. The cavity is set on two or more parting surface templates, and the sol is released from two or more parting surfaces. It is filled at the same time, and poured into multiple cavities of multiple layers through the stack mold hot runner system, so as to obtain multiple plastic parts. Among them, the stack mold hot runner system composed of two pairs of hot runner injection molds is a double-layer stack mold hot runner system. [0003] Compared with conventional molds, the clamping force of the double-layer stack mold hot runner system is only increased by 5% to 10%, but the output can be increased by 90% to 95%, thereby improving equipment utilization and p...

AI Technical Summary

Problems solved by technology

[0005] Since the structure of the double-layer stack mold hot runner system is more complicated than that of ordinary injection molds, its manufacturing cost is much higher than that of ordinary molds. If it is necessary to form two or more plastic parts of different materials through a hot runner system with only a single nozzle , the use of multiple sets of hot runner systems with a single nozzle will greatly increase the cost; in addition, the cleaning of the double-layer stack mold hot runner system for the replacement of the melt requires more time than ordinary injection molds, and repeated cleaning of the mold will be more serious. reduce production efficiency

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