Would You Like to Decrease Your Cycle Times by 40 Percent?

WMTEC developed a new process that reduces cycle times considerably and augments the quality of the moulded plastic components.

Koolgas, the novel cooled gas assisted injection moulding technique has been developed by the Warwick Manufacturing Group, a leading research institute at the University Of Warwick and is now commercially available.

Parts that have been produced using Koolgas cool and form 40% faster than with conventional Gas Assisted Injection Moulding (GAIM) methods, thus increasing plant productivity significantly. Other benefits include improved and consistent quality, its applicability to all polymers, its environmental friendliness, smooth bore profiles, dimensional stable parts and controlled crystallinity.

The new Koolgas process provides major benefits over established Gas Assisted Injection Moulding. It uses a cryogenic heat exchanger to cool down the high-pressure nitrogen to temperatures as low as --196°C. Ordinary GAIM methods have been used by plastic manufacturers to reduce the weight or to reduce cycle times when moulding plastic components. Weight reduction is achieved by gas displacing unnecessary hot plastic from the components core. Using Koolgas results in even more savings, thinner walls and smooth bores. The controlled surface cooling produces a balanced crystallisation of polymers, thus resulting in significantly less warpage" and reduced stress.

Furthermore, Koolgas integrates easily with any existing Gas Assisted Injection Moulding system requiring neither a change of process nor material nor tool change.