Product category:
Liquid Analysis: Viscosity, Density
News Release from: Celsum Technologies | Subject: Extrusion dies
Edited by the Processingtalk Editorial
Team on 10 December 2003
Extrusion dies for laboratory
applications
Celsum Technologies, located near Leicester in the UK, is supplying extrusion dies for applications such as extrusion rheometry in laboratories and pilot plant processes
Celsum Technologies, located near Leicester in the UK, is supplying extrusion dies for laboratory applications such as extrusion rheometry Celsum Technologies MD, Roy Carter, says, "We have many years experience in the design, manufacture and application of materials testing instruments, especially those for rheology and small-scale extrusion
This article was originally published on Processingtalk on 12 Jul 2004 at 8.00am (UK)
Related stories
Precision extrusion dies for quality assessment
Celsum Technologies supply a wide range of precision extrusion dies for laboratory rheometers and extrusion lines and pilot extrusion plants, to study the flow behaviour of muds and slurries
Radio telemetry for strain gauge systems
Celsum Technologies offers a range of state-of-the-art, licence-free radio telemetry instruments to allow remote strain-gauge based sensors to be monitored without the need for expensive cabling
Single-channel PID thermo-regulator
Celsum Technologies offers the EC4-173 single-channel PID thermo-regulator, in a 48 x 48 mm package, accepting both Type K and Type J thermocouple inputs
We have identified a need for a versatile service to supply precision extrusion dies in a range of materials such as tungsten carbide and stainless steel, and in a range of geometries to suit our client requirements.
We offer a tailor-made extrusion die service for many laboratory instruments and pilot plant processes".
Typically for an extrusion rheometry test, a material is extruded at the same temperatures through a set of dies of the same diameter but of different bore lengths.
For each extrusion speed, extrapolation of a plot of extrusion pressure against, in effect, bore length gives a positive pressure at zero bore length; mathematical analyses take this offset value into account in correcting for shear flow behaviour (the Bagley End Correction), and the offset value is also the source data for the estimation of the extensional or elongational flow properties of the material, which are vital to processes such as extrusion, bottle blowing, rotational moulding and coating operations.
Additionally, the choice of die can affect the extent to which the material swells after extrusion, and this Die Swell may be measured by the CADS non-contacting optical micrometer system, available also from Celsum.
Also, Celsum Technologies can supply extrusion dies with non-linear profiles, for example hyperbolic geometry.
A current project involves the supply of profiled extrusion dies with embedded miniature pressure transducers to allow pressure within the die to be monitored.
All of the dies supplied by Celsum Technologies are precision made and may be supplied with Certificates of Metrology if required. Request a free brochure from Celsum Technologies ...
• Celsum Technologies: contact details and other news
• Email this article to a colleague
• Register for the free Processingtalk email newsletter
• Processingtalk Home Page
Search the Pro-Talk network of sites
