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Our PLASTINUM Temp D solution increases the efficiency of dynamic injection moulding by using carbon dioxide as a heat carrier. This allows you to minimise cycle times by installing both the mould heating and cooling systems in close proximity to the mould surface. For cooling, liquid carbon dioxide is supplied from cylinders or bulk tanks and expands in a system of tiny channels provided with mould inserts. For heating, hot gaseous carbon dioxide is pushed through the same channels in a closed cycle. This compact design translates into added cost and environmental benefits.
How it Works
Before injecting the plastic melt, hot gaseous CO2 flows through tiny channels. At temperatures of 300°C or higher and at defined pressures, CO2 offers excellent heat transfer properties for extremely effective heating of the mould. The CO2 circulates in a closed system with a high-performance heater. An open system would also be feasible with gaseous CO2.
When the plastic melt is injected into the cavity, liquid CO2 is injected into the channels in order to quickly cool the part. The expansion to atmospheric pressure generates a mixture of CO2 snow and gas at a temperature of -79°C. This results in highly effective cooling action, with the CO2 removing heat from the mould and releasing it to the atmosphere.
High cooling and heating rates
Heating/cooling of narrow mould sections with complex geometries
Same medium for cooling and heating
Same tempering channels for heating and cooling
Only one heating/cooling system to be incorporated into the mould
Minimised amount of mould steel involved in heating/cooling
No deposits or clogging in tempering ducts
Completely dry process – no humidity in the system
Flexibility – technology can be applied to the whole mould or to particular surfaces/areas of the mould.