Lost Foam Casting Shims & Spacers

In Lost Foam Casting, shims and spacers are precision components essential for ensuring dimensional accuracy and structural integrity in the final casting. They are strategically placed between foam patterns or between the pattern assembly and the flask to provide critical positioning, support, and spacing during mold filling and compaction.

Positioning & Support: Prevents foam pattern movement or deformation during vibration compaction.
Wall Thickness Control: Precisely defines internal cavities and ensures uniform casting walls.
Channel Formation: Creates specific internal passages or gating system features.

Thickness Tolerance: ±0.05mm standard (tighter tolerances available)
Surface Finish: Smooth edges prevent foam damage during assembly
Temperature Resistance: Suitable for ferrous (iron/steel) and non-ferrous (aluminum/copper alloy) casting temperatures
Compatibility: Works with EPS, STMMA, and other common foam pattern materials

Pattern Preparation: Ensure foam surfaces are clean and flat at shim contact points
Placement: Position shims according to engineering drawings before adhesive application
Assembly: Use recommended adhesives for securing shims to foam patterns
Inspection: Verify all shims are correctly positioned before mold assembly

Batch certification available upon request
Dimensional verification using calibrated instruments
Material composition certificates for alloy grades
Sample testing for high-temperature performance

Technical Expertise: Material recommendations based on your specific alloy and pouring temperature
Volume Production: Scalable manufacturing with consistent quality control
Technical Support: Foundry process optimization guidance from our engineering team
Bottom Line: In Lost Foam Casting, shim precision directly impacts critical casting dimensions. Our engineered shims provide reliable, cost-effective solutions for improving yield rates and reducing machining allowances.