A sand core for deep hole of an automobile stamping die and a preparation device thereof
By combining multiple interlocking shell designs and shell locking components, the problems of incomplete filling, uneven solidification, and poor venting in the preparation process of deep hole sand cores for automotive stamping dies have been solved, achieving efficient and low-cost sand core preparation and ensuring the quality and precision of castings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NANTONG HONGGANG CAST STEEL CO LTD
- Filing Date
- 2026-05-18
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, the preparation process of deep hole sand cores for automotive stamping dies has problems such as incomplete filling, uneven curing shrinkage, poor venting, shell loosening and high cost, which lead to sand core breakage, casting porosity and sand adhesion defects.
The design employs multiple modular housings, combined with housing locking components and limiting bases. The housings are reliably locked through a spiral propulsion mechanism using threaded columns and snap-fit slots. The precise positioning of the positioning cone and limiting sleeve ensures the geometric accuracy and structural integrity of the sand core. A through-venting channel is provided inside the housing to exhaust gas.
It significantly reduces manufacturing costs, improves the consistency and yield of sand core preparation, avoids casting porosity and sand adhesion defects, and ensures rapid and accurate positioning and continuous venting of sand cores.
Smart Images
Figure CN122400511A_ABST