Disc Springs in Core Shooting Machines

In modern foundry operations, core shooting machines play a critical role in producing high-quality sand cores that define the internal geometry of cast components.

These machines work by filling resin-coated sand into the system and then rapidly shooting the sand into a heated core box (mold). Under heat, the sand is cured and solidified, forming a strong and precise sand core, which is then ejected as a finished component.

To ensure reliable operation, the two mold halves must close tightly to prevent sand leakage and maintain uniform pressure across the entire contact surface.

In this system, disc springs achieve flexibility/spring deflection when the tool molds are pressed together.

Disc spring package (stacked Belleville washers) is typically arranged around a centering shaft, forming a guided mechanical system. The clamping load is applied through dead weight and mechanical pressing.

When the mold closes, disc springs are compressed and deformed, generating an elastic clamping force instead of a rigid contact.This elastic feature allows the system to:

• Absorb dimensional variations and tolerances
• Prevent localized stress concentration
• Improve sealing performance
• Extend the service life of the mold

OPTIMUM Disc Spring has been manufacturing disc springs for core shooting machines since 1984.

Need expert advice? Contact our engineer today for customize solutions at jc@optimum-spring.com !