A New Generation Of Injection Moulding Technology

Gas Injection Worldwide Limited (GIWW) announces the launch of equipment and technology for ‘Rapid Temperature Cycling (RTC™ )’ of injection moulds. GIWW, supported by Oxford Moulding Technology (OMT), is offering to moulders steam and water flow control equipment and a new approach to mouldmaking construction.


Conventionally moulded componentConventionally Moulded - matt ABS at 2mm wall thickness with normal material temperature and mould temperature at 60°C

RTC moulded componentMoulded with RTC™ - same ABS material, same material temperature but much reduced injection pressure to give a high gloss finish on the 'A' surface and no visible weld lines.

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Terry Pearson, chairman of both companies said, “This is very exciting; OMT has what could be a new generation of injection moulding technology, and GIWW has a worldwide network of customer services to respond to the inevitable interest in this development.  There are bound to be many applications which require unblemished, high gloss, weld line free moulded surfaces which avoid the need for paint finishing as well as other impressive advantages.”

It is well known that if a mould cavity surface temperature is near to the plastic melt temperature the visible quality of the moulding surface can be much improved.

OMT, which has developed Rapid Temperature Cycling, has exclusive access under license to robotically controlled metal spraying technology developed at Oxford University to produce distortion free components.  This contributes to reducing the thermal mass within a mould which allows it to be heated and then cooled ‘rapidly’ during a moulding cycle.

Currently there is a market requirement from the international TV and computer industry for blemish free high gloss cabinet mouldings, avoiding the need for paint finishing. RTC is now well placed to satisfy this requirement.

Other significant benefits of Rapid Temperature Cycling include; elimination of flow lines and streaks, resin rich surfaces over glass fibre and other filled materials again producing high gloss finishes, reductions in moulded-in-stress therefore freedom from distortion after moulding, greatly extended flow paths, and lower in-mould pressures reducing press lock forces and consequent operating costs.