Non-Wetted Electrode Electromagnetic Flow Sensors

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For Injection Moulding Machines

Flow control in injection moulding machines

Application Study Vol.3

Optimum temperature in plastic moulding machines

Variations in mould temperature can lead to sink marks, short shots, cracks, and other defects. Keeping the mould as close as possible to the optimum temperature is very important. Flow control is the most important factor in controlling this variable. Because plastic moulding machines generally operate on long cycles, maximum daily production volume is based on machine capacity. If downtime is a result of defective products or mechanical issues, production cannot resume until the mould temperature is stabilized.

Restarting the moulding process while the temperature of the mould is still unstable will produce products that are defective. It generally takes about two hours of waiting time until production can be resumed, resulting in huge losses. Due to this lengthy recovery time, temperature related downtime can lead to production schedules not being met. A single problem can be the difference between a profit
or a loss. Reliable flow control can be used to avoid this risk.

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