- Overview
- Technical data
- Screw design
Built to meet rigid manufacturing standardsC.W. Brabender® Laboratory Extruders are built to meet rigid manufacturing standards. They must provide close test reproducibility in order to act as measuring heads to the Plasti-Corder® torque rheometer, a precision instrument. Their output depends on testing variables such as, melt temperature, extrusion material, screw and die design, rpm, pressure and feeding. Sixteen standard models include L/D ratios of 10:1, 15:1, 20:1, 25:1, and 30:1. Different models provide alternate methods of heating and cooling. Temperature regulation on each is performed by a corresponding Brabender® Control Console or Circulator System. APPLICATIONS • Laboratory Sample Preparation The 416 stainless steel, honed and nitrided barrels are manufactured in various L/D ratios. The extruders are equipped with two ports near the screw tip for either a transducer or a stock temperature thermocouple, and a rupture safety plug. Barrels can be supplied with grooves for improved shearing and positive transport of material in the extruder. Other designs and alloys can be provided for special applications. |
| Screw Diameter | Screw Torque | Operating Temperature | PSI |
| 1/2" | 50 Nm (5,000 mg) | 400 °C | 10,000 |
| 3/4" | 120 Nm (12,000 mg) | 400 °C | 10,000 |
| 1-1/4" | 240 Nm (24,000 mg) | 400 °C | 10,000 |
| L/D Ratio | Screw Design |
| 10:1, 15:1, 20:1, 25:1, 30:1 | 1:1 up to 5:1 Compression Ratio |
| 20:1, 25:1, 30:1 | Metering Screw |
| 20:1, 25:1, 30:1 | Single Stage Mixing Screw |
| 20:1, 25:1, 30:1 | Dual Stage Mixing Screw |
| 20:1, 25:1, 30:1 | Nylon Screw |
| 25:1, 30:1 | * Venting Screw |
| 25:1, 30:1 | * Venting/Mixing Screw |
| * Also Available for 1-1/4” 20:1 L/D Ratio Other mixing screw geometries available -- consult manufacturer. |
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