Injection molding die structure of insulation shaft

Abstract

The invention provides an injection molding die structure of an insulation shaft and relates to the technical field of plastic machining. The injection molding die structure comprises an upper die frame, a lower die frame, an upper die cavity, a lower die cavity and shaft bodies. The lower die cavity is provided with a lower die feeding hole and multiple lower die holes, runners communicating withthe lower die feeding hole and the lower die holes are arranged on the upper end face of the lower die cavity. Upper die holes communicating with the upper end face and the lower end face are formedin the upper die cavity, and the shaft bodies are connected with the upper die holes and the lower die holes in an inserted manner. A feeding cap communicating with the lower die feeding hole is arranged on the upper die frame. By means of the injection molding die structure of the insulation shaft, the technical problems that in the prior art, BMC bulk molding compounds are formed on the shaft bodies through an injection mold and an injection molding machine, heating is not uniform, material fluidity is not good, and consequently the product scrap rate is high are solved. The injection molding die structure has the beneficial effects that injection molding insulation materials enter the upper die holes and the lower die holes from the part between the upper die and the lower die through the runners, fluidity is good, and feeding of the shaft bodies is uniform. Alignment of the upper die holes and the lower die holes is accurate, and the phenomenon that the insulation layer is too thick, and consequently the subsequent machining allowance is excessively wasted is prevented. The die heating speed is high the heat loss is low, and the injection molding effect is ensured.

Description

technical field [0001] The invention relates to the technical field of plastic processing, in particular to an injection mold used for making bulk molding compound pair insulating shafts. Background technique [0002] BMC bulk molding compound is molded onto the shaft body through injection molds and injection molding machines, and an insulating layer is formed on the shaft body. After the insulating layer is machined, it will have better electrical properties, mechanical properties, heat resistance, and chemical corrosion resistance. , which can meet the performance requirements of various products. Chinese patent application publication number CN107053596A, the application publication date is August 18, 2017, and the invention patent application document titled "A Double Insulated Rotor BMC Integrated Molding Machine" discloses a BMC bulk molding compound device. Including the lower forming core, upper forming core, lower clamping part, upper clamping part, and finished r...

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Problems solved by technology

[0003] In order to solve the technical problems in the prior art that the BMC bulk molding compound is molded to the shaft through the injection mold and the injection molding machine, the heating is uneven, and the fluidity of the material is not good, resulting in a high product scrap rate. Injection mold structure for insulating shaft with good fluidity

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