Product data
| Name | Screw Barrel Solution for MIM & CIM Injection Processing |
|---|---|
| Typical Application | Metal Powder (MIM), Ceramic Powder (CIM) |
| Process Method | Injection |
| Material Recommendation | PM Steel V10, Tungsten Carbide |
| Surface Treatment | HVOF |
| Hardness | HRC 62 - 70 |
| L/D Ratio | 16:1 to 20:1 |
| Max Temperature | ≤ 250°C (482°F) |
Technical Challenges
- Metal and ceramic feedstock is extremely abrasive due to high powder loading (60%+), rapidly wearing screw flights and barrel bore.
- Powder-binder separation during plasticising causes density variation and sintering defects in the finished part.
- High viscosity and non-Newtonian behaviour demand precise shear control to keep the feedstock homogeneous.
- Any contamination or wear debris becomes a critical defect in the sintered component.
Rootier's Technical Solutions
- 01Wear-clad screws and barrels built from PM steel V10 and tungsten carbide for extreme abrasive service.
- 02HVOF tungsten-carbide liners that hold bore tolerance over long feedstock campaigns.
- 03Low-shear mixing screw geometry engineered to keep powder and binder uniformly dispersed.
- 04Hardened, polished melt channels that prevent feedstock adhesion and contamination.
- 05Tight clearance control between screw and barrel to minimise residence-time variation.
Frequently Asked Questions
Metal powders (stainless steel, tool steel, titanium, nickel alloys) or ceramic powders (alumina, zirconia, SiC) mixed with organic binders (wax, PE, POM).
Aerospace fasteners/gears, medical implants/surgical tools, automotive sensors/turbochargers, watch parts, firearm components, precision electronic connectors.
High-strength screws for 50%–70% powder loading, wear-resistant liners, powder-conveyance geometry, devolatilization zones, robust construction.
Metal/ceramic powders (Mohs hardness 5–9) in high concentration within binder matrix create extreme abrasion under high pressure and shear.
Higher loading improves green part quality but accelerates wear. Account for powder-to-binder ratio, particle size/hardness, output rate, screw hardness (HRC 60+), specialized coatings, and frequent inspections.