How Do I Select the Right Vertical Kneading Machine for My Production?
Selecting the correct vertical kneading machine depends on five main factors: batch size, material viscosity, temperature sensitivity, vacuum requirements, and cleaning frequency.
Step 1 – Determine your working volume
Calculate the total weight per batch and divide it by the material’s bulk density. The working volume of the vertical kneader should be 60‑70% of the total bowl capacity. For example, if your batch weighs 30 kg and has a density of 0.8 kg/L, the required working volume is ~38 L, so a model with 50‑60 L capacity (like SXJ‑60) would be suitable.
Step 2 – Assess viscosity and power needs
Higher viscosity materials require more powerful motors. Use the table below as a rough guide:
| Viscosity Range | Recommended Kneading Power (per 100L working volume) | Typical Models |
|---|---|---|
| Low (< 10,000 cP) | 3‑5 kW | SXJ‑10, SXJ‑15 |
| Medium (10,000‑100,000 cP) | 5‑11 kW | SXJ‑30, SXJ‑50, SXJ‑60 |
| High (> 100,000 cP) | 15‑37 kW | SXJ‑100, SXJ‑200, SXJ‑500 |
| Very high (paste/putty) | 45‑75 kW | SXJ‑1000, SXJ‑2000 |
Step 3 – Temperature control
If your process requires heating or cooling, choose a vertical kneading machine with a heating and cooling jacket. Electric heating suits small batches; steam or thermal oil is more economical for large production.
Step 4 – Vacuum or no vacuum?
For de‑aeration of silicone rubbers, epoxies, or pharmaceutical gels, a vacuum vertical kneader is essential. Specify the required vacuum level (typically ‑0.095 to ‑0.098 MPa) and the holding time.
Step 5 – Cleanability and GMP
For food or pharmaceutical use, request a GMP‑compliant vertical kneader with mirror‑polished surfaces, crevice‑free welds, and CIP (clean‑in‑place) options.
By following this structured approach, you can confidently select a vertical kneading machine that matches both your production capacity and quality standards. Our technical team also offers free material testing to validate your choice.
