A dry sand negative pressure casting method for deep cavity sand negative pressure reinforcement air extraction
By using hollow seamless steel pipes for directional air extraction and pressure replenishment in dry sand negative pressure casting, the problem of insufficient compaction of deep cavity molding sand was solved, achieving efficient and reliable casting molding and improving casting quality and production efficiency.
CN122400514APending Publication Date: 2026-07-17WUHU RUYHOO CASTING
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WUHU RUYHOO CASTING
- Filing Date
- 2026-05-15
- Publication Date
- 2026-07-17
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Figure CN122400514A_ABST
Abstract
本发明涉及实型铸造技术领域，通过一种干砂负压铸造深腔型砂负压补强抽气的铸造方法，通过 360° 环形密布透气孔 + 双重防砂设计，实现深腔负压死角定向抽气补压，使型砂紧实均匀、强度达标，有效减少铸件气孔、砂眼、浇不足等缺陷，同时避免冷却收缩导致的变形问题，提升铸件尺寸精度与成型稳定性，封堵端采用 “满焊 + 耐高温密封胶” 双重密封，透气孔孔径小于型砂最小粒径且外壁包覆过滤层，从结构设计上彻底解决漏气、漏砂及微孔堵塞问题，保障负压抽气效率的稳定性，降低工艺故障风险。
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