Instruction manual

5 5 Heat-Cool Control5 5 Heat-Cool Control
An injection mold needs to be controlled at 120 F to ensure a consistent
quality for the parts. An oil pipe is buried in the mold. Since plastics are
injected at a higher temperature ( e.g. 250 F ), the circulation oil needs to
be cooled as its temperature rises. Here is an example:
An injection mold needs to be controlled at 120 F to ensure a consistent
quality for the parts. An oil pipe is buried in the mold. Since plastics are
injected at a higher temperature ( e.g. 250 F ), the circulation oil needs to
be cooled as its temperature rises. Here is an example:
Plastics
Oil
Pump
Oil
Pump
Oil TankOil Tank
Heater
Supply
Heater
Supply
Freezer
4-20 mA4-20 mA
OUT2
RTD
OUT1
IN1
Figure 5.7Figure 5.7
Heat-Cool Control ExampleHeat-Cool Control Example
Injection Mold
120 F
Injection Mold
120 F
88
O1
O2
A1
F
ETR-3400