Ceramic Fused Sand (Ceramic Bead Sand ) for Copper Tube Casting

1. Product Introduction

2. Key Advantages for Copper Tube Casting

• Spherical shape & excellent flowability

  Uniformly fills long, narrow, curved or complex inner cavities of copper tubes, ensuring consistent wall thickness and smooth inner surfaces.

• Extremely low thermal expansion

  Minimal expansion at high temperatures, preventing sand expansion defects and guaranteeing high dimensional stability of copper tubes.

• High refractoriness & chemical inertness

  Resists high temperature of molten copper, avoids mechanical and chemical penetration, and produces clean, non-sticky inner walls.

• High permeability & low gas evolution

  Reduces blowholes, pinholes and gas-related defects in copper tubes significantly.

• Excellent collapsibility & easy cleaning

  After casting, the sand core breaks easily and can be quickly removed from long copper tubes, greatly improving cleaning efficiency.

• High reusability

  High strength and low breakage allow recycling rate over 95%, lowering overall production cost.

3. Typical Applications

• Inner cavity filling sand for straight copper tubes, long copper tubes, bent copper tubes
• Sand cores for precision copper fittings, valve bodies, connectors and electrical copper components
• Core making in gravity casting, low-pressure casting and die casting of copper alloys

4. Recommended Particle Size

• For general copper tubes: 70–140 mesh
• For fine inner bores & high surface finish: 100–200 mesh