Regloplas- Temperature Control Technology

InterpretingRegloplas dataNotesThe following notes provide important information oninterpreting the technical data and selecting Regloplastemperature control units.Expansion of the heat transfer fluidThe value given in the table ‘Technical Data’must be higher than the volume increase dueto temperature during operation.When the installation is idle, some of the contentsof the consumer may flow back to thecontrol unit, depending on the set-up (differencein level between temperature control unitand consumer). In large-capacity consumers(e.g. rollers), the value specified ensures thatthe heat transfer fluid flowing back to the controlunit can be accomodated.Cooling capacityGenerally speaking knowing the maximumvalue alone is not enough to determine thecapacity. We provide a diagram of the coolingcapacity.Pump capacityKnowing the maximum values alone is notenough to determine the pump capacity. Weprovide the characteristic curve of the pump.ControlControl accuracy. Short-therm accuracy of thetemperature control circuit (controlled system)is very difficult to pinpoint. The accuracy of theRT100 and RT61 control systems and the RT32controller alone is better than ±1°C.The accuracy of the temperature control circuitcan vary considerably, depending on thestrength and duration of the disturbancesaffecting the circuit.For example:– Production start-up– Production interruption– Changes in the injection cycle (injectionmoulding)– Changes in the material and ambient temperature.Cascade control: If the consumer is equippedwith a sensor, the control system automaticallyswitches to cascade control: Using two coupledcontrollers, the temperature of both thefluid and consumer is controlled. Cascade controlenables optimal control of the consumertemp erature, a critical factor in overall productionquality.Unit selectionMinimum data required:1. Set value temperature/temperature range ofthe consumer.2. Weight or dimensions and material of theconsumer.3. Desired heat-up time in hours.4. Quantity of processed material in kg/hand designation of the material.5. Temperature of the material to be processedwhen it reaches the consumer (e.g. injectionmould).6. Max. cooling water temperature (if > 18 °C).23