Can the Gate and Sprue of MIM be Reused? Is there any Restrictions or Risks noteworthy?

Date：2025-07-31   Views：0

Answer: Yes. Gates and sprues are made from the same feedstock as the product, making them theoretically recyclable. 

And it is economic and environmentally friendly: Recycling reduces raw material costs (metal powder accounts for 40%–60% of costs) and reduces waste.

Recycling Process and Requirements

Recycling Restrictions and Risks

Performance impact:

• Recycled material undergoes secondary heating/shearing, which may cause binder aging and reduced flowability.

• Metal powder oxidation or contamination (e.g., mixing with release agents) reduces sintering density and mechanical properties.

Prohibited in critical applications:

Medical devices (e.g., ISO 13485 certified), aerospace, and other high-performance parts must not use recycled material to avoid composition variability risks.

Recycling frequency limits:

Typically only one recycling cycle is permitted; multiple cycles may accumulate defects.