A mold structure of secondary core-pulling of a row

CN224545231UActive Publication Date: 2026-07-24FOSHAN SHUNDE DEXING KEDA MOULD PROD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
FOSHAN SHUNDE DEXING KEDA MOULD PROD CO LTD
Filing Date
2025-10-16
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

When performing core pulling and deep hole drilling in existing injection molds, the clamping force between the insert pin and the product is too large, resulting in a high product damage rate and rapid wear of the insert pin, which affects production efficiency and mold maintenance costs.

Method used

The mold structure adopts a secondary core-pulling mechanism. Through the coordinated design of the shoulder screw, limit block and reset component, the step-by-step separation action of the insert pin and the slide support plate is realized. The deep hole insert pin is pulled out first, and then the slide support plate is driven to detach, reducing the clamping force.

Benefits of technology

It reduced product damage rate, extended mold life, reduced mold maintenance costs, and improved production efficiency and mold operation stability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of injection mold discloses a mold structure of secondary core-pulling of row position, including mutually coordinated front mould and back mould. The front mould includes A board and the inclined guide pillar fixed in A board, the back mould includes B board, male die, row position seat, row position backing plate, shaft shoulder screw, deep hole insert, limit block, reset piece. The structure through shaft shoulder screw, limit block and reset piece cooperation, realize the secondary core-pulling of " first abstracting deep hole insert, later driving row position backing plate to separate", solve the product pull bad problem of traditional single core-pulling because of the big deep hole and insert holding force, improve the qualified rate of deep hole product ejection, and the stable and durable structure reduces the mold maintenance cost.
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