Another innovation that followed later was the introduction of the Thermally Compensated R-Screw. Research showed that installation of a heat tube in the front end of the screw would effectively transfer excess heat from the compression zone back to the transition zone, where it could be reused to assist in the melting of incoming pellets. Screw wear from unmelted pellets was dramatically reduced. But perhaps even more important, the ability to turn down front end heat had a direct and positive effect on cycle time, part quality and reject rate.

Finally, IMS SPIRAL Technology was applied to the screw – more specifically, the screw flights. With IMS SPIRAL R-Screws: 1. Pellets move forward in a more controlled, gentle tumble. 2. Pellets begin melting sooner and proceed in a far more efficient and orderly manner. 3. Pressure is provided by the lateral movement of the screw (as it should be) – NOT by the compressing of the material by the screw flights, as is the case with all existing injection screws. Believe it or not, after nearly 30 years since the introduction of the reciprocating screw, the IMS SPIRAL R-Screw was the FIRST and ONLY screw developed expressly to reduce molded-in stress and strain. Research has revealed the injection machine doesn’t work as hard and produces more consistent quality parts.