11 August 2005
11 August 2005
Axson Group’s R&D department has developed a new performance line of extrudable pastes called SC167, SC300 and SCP270 which allow industries such as automotive, aerospace and marine to create high quality models and tools.
“Axson has followed the technical changes of today’s industries and with the advantages of the new extrudable paste series we have taken that next step in affordable tooling products and the cost effective means that of the designers needs in their industries”, said Patrick Blosse, Axson Director of International Development.
These extrudable pastes are said to provide excellent surface quality, low shrinkage, very good dimensional stability and without the hassles of bond lines that you see with similar board usage.
“We have developed these pastes SC167, SC300 and SCP270 for the automotive and marine industries. The automotive industries especially need a material to create high quality models with an extremely good surface without the bonding lines. SC167 answered all these concerns with the ability to rework the surface if needed by hand. Its softness allows similar to today’s hand application but yet can be machined like a clay, wood or plaster. SC300 Answered the needs for a high mechanical and thermal property material for use in those areas such as metal forming, vacuum forming and low temperature pre-preg curing applications. SCP270 was specifically designed for those in the marine tooling industries. The polyurethane extrudable paste is extremely cost effective for those industries where use of boards are cost prohibitive. With SCP270 you can create extremely large scale models and tools and still retain that easy of use and excellent surface aspect you need”, explains Patrick Blosse.
Artware Design, who specialise in the design, creation and production of prototypes, mainly for automotive, recently produced the full scale model of the C4 for Citroen. For cost and delivery reasons, they decided to produce this full size model using the SC167 epoxy extrudable paste, developed by Axson.
“We fully master this technique, and we have optimised it to be able to produce a rolling model without the need of a mould and composite parts” declared Alain Grandjean, CEO of the company.
After a quick and rough milling of the polystyrene block, the operator first lays-up the paste on a 20 mm thickness. After more than 24 hours, the paste is then machined with a 5 axis CNC, to the final dimensions. This hardening time seems long, but guarantees a low shrinkage and low internal stresses. The various blocks having been bonded, the whole car body is then treated and painted.
“Since it is not made in composites, this prototype could not be competitive on a rally! But it can be driven at low speed and that’s what it is designed for. We are also used to the classical cycle model / mould / parts, but it generally induces longer lead times and higher costs” concluded Alain Grandjean.
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