Precision Extrusion Dies
Aptifirst can design and supply extrusion dies in a range of materials for rheological testing (rheometry), laboratory extrusion, and other applications. Please contact us with details of your requirements.
We can supply precision-machined extrusion dies with specific external geometry to suit your rheometer, in materials such as tool steel, stainless steel, tungsten carbide and many others.
As our animated* diagram above indicates, we can provide dies with different diameters, bore lengths, entrance angles and external geometries. We can supply you with certificates of metrication, and meet the exacting tolerances demanded by testing standards.
As well as parallel-bore dies, we can supply also dies with profile bores, such as the hyperbolic profiles in our diagrams, above, tapered or stepped bores, etc. We can add O-ring grooves to help seal against leakage if you wish. Hyperbolic dies are used in some studies of extensional flow.
Why not let us quote for your extrusion dies? We can supply dies for most capillary rheometers and extruders. Our prices are very competitive, and we are always willing to provide you with the dies that you want, rather than just offering sizes from a standard list. Send us a sketch or description of your design, either by email, fax or mail, and let us know in which material you would like it made.
We can also supply other accessories for capillary rheometers, such as cleaning mesh, pressure transducers, slit dies, backpressure dies for pressure coefficient of viscosity, die swell monitors, infra-red pyrometers for viscous heating, and others.
Two tungsten carbide rheometry dies
A Bi-Hyperbolic profile die (two hyperbolic profiles back-to-back - see diagram on left) in stainless steel, fitted with a subminiature pressure transducer at the mid-point
Three tungsten carbide hyperbolic-profile dies for an ACER capillary extrusion rheometer.
Two hyperbolic-profile dies for a test rig
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VAT Registration Number: GB 996 3196 62 Directors: B A Carter, R E Carter MSc FIMMM, CEng
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