In the manufacturing process of sintered diamond tools, what should you do if you encounter loose, layered, or cracked compacts during cold pressing?
A material that cold-presses smoothly for Customer A may present various issues for Customer B. To address this, we’ve summarized the common problems and corresponding solutions below:
If compacts are loose and fail to hold their shape, inspect the following:
- Whether the pressing pressure is sufficient
- Whether the matrix powder is damp or oxidized
- Whether the binder and lubricant are mixed evenly
- Whether the mold/die is in proper working condition
For layered structures or inconsistent density, pay attention to:
- Ensuring good fusion at the pressing interface
- Avoiding excessively fast pressing speeds
- Verifying synchronized operation of the mold/die
- Guaranteeing uniform mixing of powder and diamond to prevent segregation
Cracks or edge chipping after demolding are usually related to:
- Excessive springback
- Rough mold/die surfaces
- Uneven pressure distribution
If diamond agglomeration occurs, consider reducing the diamond content or improving mixing uniformity.
The above covers some common issues faced by customers. For topics like compact deformation and mold sticking, please refer to our next article.
