A casting mold for forming a saddle, a processing technique, and a casting sand removal method

By using a multi-layer composite sand core structure and optimized casting process and sand removal methods, the problems of insufficient strength and poor heat dissipation of the rocker bolster sand core were solved, achieving efficient casting forming and cleaning, and improving the quality of rocker bolster castings.

CN122425161APending Publication Date: 2026-07-21CHONGQING TONGYAO INTELLIGENT EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING TONGYAO INTELLIGENT EQUIP CO LTD
Filing Date
2026-04-27
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In traditional sand casting, the sand core of the bolster is not strong enough, has poor heat dissipation capacity, and is not easy to clean, which affects the forming quality and surface quality of the casting.

Method used

A multi-layered composite sand core structure is adopted, including a main core and core blocks, with core reinforcement and venting ropes. Combined with specific hardening processes and gating systems, the casting process and sand removal methods are optimized, including steps such as vibration sand removal, water bath heating, and alkaline water degradation.

Benefits of technology

It improves the stress strength and heat dissipation capacity of the sand core, optimizes the molding process, reduces the difficulty of mold processing, and achieves efficient cleaning of the casting cavity, thereby improving the molding quality and surface quality of the casting.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application belongs to the field of sand casting, and discloses a pouring mold for forming a rocker, a processing technology and a casting sand removal method. The scheme supports a thick and long sand core through a core bone, improves the stress strength, avoids being washed away by a metal melt, and guarantees the forming quality of the inner cavity of the rocker. The core block and the main core body are made in a split mode, the negative angle structure is formed without affecting the core box demolding, the processing technology is optimized, and the manufacturing difficulty of the core box is reduced. The pre-embedded exhaust rope forms an exhaust passage to lead out the heat in the middle of the sand core and avoid the metal melt and the sand core from sticking to each other. The main core body and the core block are formed in a split mode, the forming difficulty of the mold and the sand core is reduced, different raw material ratios can be used to adapt to different hot junction areas and metal melt washing strengths. Multiple composite sand removal methods such as sand dropping, water bath, baking, jet washing and alkali water degradation are used to completely remove the sand in the inner cavity of the rocker and efficiently clean the sand core.
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