A slanted sprue structure for a high light part
By designing an inclined top gate structure and utilizing graded runners and bulges to change the melt flow trend, the problems of weld lines and air marks caused by the unbalanced discharge of hot runners were solved, thus improving the processing quality of high-gloss parts.
CN224374747UActive Publication Date: 2026-06-19TIANJIN HUARUIYUAN TECH
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN HUARUIYUAN TECH
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-19
AI Technical Summary
Technical Problem
When using existing injection gates for high-gloss parts, uneven flow of glue through the hot runner leads to weld lines and air marks, affecting the product's appearance and inconsistent processing quality.
Method used
Design a sloping top gate structure, including a back plate body, a main gate, a sloping top body, a graded runner and a cold runner channel. By designing the graded runner and the bulge, the melt flow trend is changed, and weld lines and gas marks are avoided.
Benefits of technology
It effectively solved the problems of weld lines and air marks, and improved the stability of product appearance quality and processing quality.
✦ Generated by Eureka AI based on patent content.
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Figure CN224374747U_ABST
Abstract
This utility model provides a sloping top gate structure for high-gloss parts, relating to the field of injection mold design technology. The sloping top gate structure for high-gloss parts includes a back plate main body, with a main gate formed on the outer wall of the back plate main body. A sloping top body is integrally connected to the outer wall of the back plate main body. A graded runner is provided on the outer wall of the back plate main body, with a bulge located on one side of the main gate. A flow-blocking port is provided on one side of the main gate. This utility model incorporates a graded runner before the gate, with a thickness half that of the main cold runner. The melt tumbles within the graded runner, altering its flow direction, resulting in a faster flow in the middle and slower flow at both ends. This avoids weld lines and air marks. For particularly serious product appearance issues, a semi-circular bulge with R3.5 and a length of 3.5 + 6.3 is added in the middle of the graded runner to further increase the flow velocity in the middle, preventing weld lines and air marks and improving the stability of the gate's impact on product processing quality.
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