How To Stably Control Molding Sand Quality

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First, stabilize basic components of molding sand. Molding sand mainly consists of recycled sand, new sand, bentonite and additives, with 95% raw materials coming from circulating recycled sand. Continuously test effective bentonite, additive content and mud content, and accurately supplement auxiliary materials according to test data to balance performance changes caused by fluctuations of sand-metal ratio. Continuously track burnout loss of recycled sand. Different casting structures create varying sand-metal ratios. Recycled sand components change after high-temperature pouring, so new sand shall be supplemented timely based on molding sand burnout loss to maintain overall component balance.

Prioritize monitoring three test indicators: 1. Wet compressive strength – adjust bentonite dosage according to readings to guarantee sand mold strength; 2. Effective additive content – directly determines sand mold anti-adhesion performance; 3. Mud content – activate dust removal when mud content rises continuously; sudden drop indicates abnormal core sand mixing.

Molding sand management is persistent work that cannot be solved permanently by one-time adjustment. Establish regular molding sand sampling and testing systems, dynamically adjust auxiliary material ratios according to test reports, stabilize all physical and chemical indicators of molding sand, guarantee uniform hardness of sand molds produced by horizontal molding machines and eliminate various casting defects at the source.

Delin Intelligent Technology Co., Ltd. specializes in the R&D and manufacturing of fully automatic horizontal parting molding machines, equipped with self-developed patented hydraulic systems for stable operation and lower energy consumption. Well-known brand accessories are adopted for all machines with standardized assembly processes. The company has established a full-process quality control team and comprehensive after-sales service system to fully reduce enterprises’ operation and maintenance pressure.