Rheometrical die heads
Practice-oriented plastification under processing conditions
All slot capillary dies are highly polished and have a coating against corrosion and abrasion.
A precise description of the flow processes within polymer processing machines implies exact knowledge of the rheological characteristics of polymer melts, in particular of their viscosity behaviour within a wide, practice-oriented range of shear rates.
The Brabender capillary rheometer system, consisting of a laboratory extruder with a suitable drive unit, a rheometric capillary die head, and a high-precision melt pump covers a practice-oriented range of shear rates and allows reliable statements about the material behaviour during different processing stages. The advantages compared to conventional high-pressure capillary rheometers are evident:
The program of measuring die heads is completed by several special measuring die heads:
- 2- and 3-stage slot capillary die heads
for the determination of shear and elongational viscosity to assess the flow behavior of the melt
- Garvey die head (ASTM D 2230)
special measuring die for testing elastomers
- Swelltest die head
Mounting and interchanging of the die heads at the extruder or Extrusiograph is very easy: just fix them with the ring nut at the extruder barrel. The die heads are made of extremely corrosion-resistant steel and are heated electrically in the standard version. However, if you need a liquid heated design for a special application, just ask us. All die heads have threaded bores for taking melt temperature and/or pressure transducers. Most of the die heads can be used vertically and horizontally.