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Optically perfect, water clear, soft material for the MTT Vacuum Casting Process

04-21-2009 01:10 PM CET | Science & Education

Press release from: MTT Technologies Group

Vacuum casting resin type 9070

MTT Technologies, formerly MCP Tooling Technologies Group introduces an unusual material for prototyping and product development purposes.

Generally, rubber, soft type vacuum casting resins are generally black, dark brown or amber in colour. Because of 9070's transparency any pigment can be added to create any RAL or pantone colour and if required, even tinted variations. This is an extremely important aspect for industrial designers and for any company involved in product development.

Applications for 9070 are all those which need to be soft, rubber type, optically clear and possibly coloured matched:

- Sport shoes and shoe accessories

- Hoses, seals, bellows and tubing where flow properties of fluids need to be observed during the product development phase

- Optical sports equipment which needs to be soft, such as diving and breathing masks and masks generally, which are integrated into protective helmets

- Non breakable spectacle lenses

- coloured overmoulding of metal parts for soft-touch applications

The Technology of Vacuum Casting

Silicone rubber is used to cast and produce a mould from a model. The models used are typically produced from a CAD data file using a generative rapid prototyping process for example Stereolithography.

The model is finished to a high quality and the parting line defined to allow separation. Silicone rubber is cast around the model using vacuum to remove all bubbles.The mould, after being left to cure for 4 – 10 hours is cut open along the parting line and the model removed leaving an exact cavity to produce copies in vacuum casting resins. The flexibility of the silicone rubber allows undercuts. Very complicated castings are produced by cutting the mould into several segments according to the parting lines.

Vacuum Casting is a copying technique used ideally for the fast production of prototypes and limited runs. There are over 20 different PU based vacuum casting resins available for producing prototypes ranging from super soft, optically clear to high temperature materials used for engine compartment applications.

More Information:

Author: Ronald Simmonds, MTT Technologies Group, formerly MCP-Group

MTT Technologies, formerly MCP Group, has had more than 50 years experience in designing and supplying process technologies, equipment and proprietary materials foremost to the aircraft and automotive industry; workholding and material solutions for machining turbine blades and optical lenses; prototype sheet metal forming systems; metal spray mould processes for plastics tooling. One of the most popular processes is MCP now MTT Vacuum Casting which was introduced as the very first supplier long ago as 1987. MCP now MTT Vacuum Casting enables high quality low volume production of plastic and nylon parts and wax parts for metal prototyping. With over 1500 installations worldwide in the prototyping industry, MCP now MTT is recognised the state of the art supplier with the leading technology. Further interesting products, facts and information. Purpose built, injection moulding machines for prototyping requirement: Silicone, soft tooling technology. 2002: MCP receives the highly regarded TÜV Rheinland certification for vacuum casting machines and is the only manufacturer to supply vacuum casting equipment with the very highest international safety rating: TÜV GS Rheinland, VDE, CE and DIN ISO 9001. 2002: The introduction of the MCP - Realizer SLM using Selective Laser Melting Technology which builds Tools and single individual engineering and implant parts in pure, dense steel cobalt - chrome and titanium from CAD data files.

Going back as long as 25 years, all MCP now MTT processes have been sold and supplied worldwide with comprehensive hands-on training course in mould and prototype production through MCP's own technicians. See our reference list.

2008 - After merging the MCP Group and Sidech SA the independent MTT Technologies Group was founded. This Technology Group continues to produce and develop the various tooling technologies as well as the new Selective Laser Melting Technology via factories in Germany and UK as well as a global distributor network.

MTT supplies the Full Service Supplier
the widest range of machines, mould making and casting materials, tools and accessories, complete customer training - worldwide. MTT Tooling and Casting Technologies guarantee the quickest return on investment.

MTT Technologies Ltd.
Whitebridge Way, Whitebridge Park, Stone,
Staffordshire ST15 8LQ.
Tel: +44 (0)1785 815651
Fax: +44 (0)1785 812115


MTT Technologies GmbH
Roggenhorster Strasse 9 c
D- 23556 Lübeck
Tel. +49 451/16082- 0
Fax.+49 451/16082 - 250

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