Injection molding mold for PVC (polyvinyl chloride) pipe fitting joint

By adopting a combination design of fixed mold base and sliding mold base in the injection mold of PVC pipe fittings, and the eccentric coaxial conversion of the main spindle core device and the side spindle core device, the efficiency and quality problems in the injection molding production of T-shaped tee pipe fittings are solved, achieving efficient and uniform injection molding and improved product quality.

CN122275246AActive Publication Date: 2026-06-26ERA CO LTD +2
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Patent Information

Application Number
CN202610720171.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-25
Publication Date
2026-06-26
Estimated Expiration
2046-05-25

AI Technical Summary

Technical Problem

Existing PVC pipe fitting injection molds suffer from low production efficiency, high energy consumption, and poor product quality in mass production. In particular, the irregular structure of T-shaped tee fittings leads to uneven resistance distribution when the plastic flows in the cavity, which easily results in insufficient filling and material shortage.

Method used

The design employs a fixed mold base and a sliding mold base, combined with a main spindle core device and a side spindle core device to form a T-shaped injection mandrel. Dual-cavity injection is achieved through a DC channel, and the mandrel structure with eccentric coaxial conversion ensures that the injection plastic fills the cavity quickly, avoiding material shortage. At the same time, the product quality is improved through the rotation and stirring of the molding sleeve and the cooperation of the cooling channel.

Benefits of technology

It improves the production efficiency of PVC pipe fittings, prevents insufficient filling, ensures product dimensional accuracy and physical properties, reduces bubbles and warping deformation, and enhances the surface quality and overall performance of the products.

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Abstract

The invention discloses a PVC pipe fitting joint injection molding mold, and belongs to the technical field of injection molds, the PVC pipe fitting joint injection molding mold comprises: a fixed mold base, one side end face of which is fixedly provided with a first water cooling plate; the sliding die holder is arranged on one side of the fixed die holder in parallel; the fixed template is mounted on the end surface of one side, close to the sliding die holder, of the first water-cooling plate; the movable die plate is fixed on one side, close to the fixed die plate, of the sliding die holder; the two mold cavities are symmetrically formed in the fixed mold plate left and right; the two guide core units are respectively mounted in the mold cavities on the fixed mold plate; the fixed mold plate and the movable mold plate can be tightly matched to form two injection molding cavities of the PVC pipe fitting connector, a core shaft in the main shaft core device can be eccentrically or coaxially distributed with a mold cavity when rotating along with a rotating shaft, rapid mold filling of a PVC material is facilitated, the injection molding period is shortened, material shortage or incomplete filling caused by flow blocking is prevented, and the product quality is improved. The product quality is improved.
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