Mold for injection molding of U-shaped bent pipe fitting

Abstract

The invention relates to the technical field of pipe fitting forming molds, in particular to a mold for injection molding of a U-shaped bent pipe fitting. The mold for injection molding of the U-shaped bent pipe fitting comprises a sliding seat capable of moving along the mold closing direction of a movable mold, a demolding plate capable of moving towards movable cores between a mold locking position and a demolding position, and a telescopic device used for driving the demolding plate; a core mold comprises a pair of movable cores and a pair of fixed cores, when the demolding plate moves towards the demolding position from the mold locking position, the demolding plate extrudes the end surface of the formed U-shaped bent pipe fitting, so that the U-shaped bent pipe fitting is separated from the movable cores and the fixed cores. In the mold for injection molding of the U-shaped bent pipe fitting, the U-shaped bent pipe fitting is pushed to be separated from the core mold by the aid of the demolding plate, automatic demolding can be completed without arranging an ejector pin, so that the surface of the U-shaped bent pipe fitting has no ejection marks and is more attractive.

Description

technical field [0001] The invention relates to the technical field of pipe fitting forming molds, in particular to a mold for injection molding of U-shaped elbow pipe fittings. Background technique [0002] Plastic pipes are developing steadily, and PE pipes, PP-R pipes, and UPVC pipes all occupy a place, among which the strong development momentum of PE pipes is the most eye-catching. PE pipes are used in a wide range of fields. Among them, water supply pipes and gas pipes are the two largest application markets. The Chinese name of PE chemical is polyethylene. PE material is widely used in the field of water supply pipe manufacturing due to its high strength, high temperature resistance, corrosion resistance, and non-toxicity. Because it will not rust, it is an ideal pipe to replace ordinary iron water supply pipes. The U-bend of PE pipe fittings is mainly used in ground source heat pump systems, mainly to play the role of turning back the laying joints of the pipes du...

AI Technical Summary

Problems solved by technology

[0004] The U-bend injection molding PE pipe fitting forming mold, every time the mold is closed and reset, sliding friction occurs between the fixed core 4 and the material closing port of the movable template 5 of the mould, which easily leads to a short life of the fixed core and the produced U Type elbow fittings are prone to flash

The mold uses ejector pins to eject the U-bend pipe fittings from the mold, and there will be marks on the surface of the U-bend pipe fittings, which will affect the appearance of the U-bend pipe fittings.

Images