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10 2020
Melt Pressure Transducer Description
Melt pressure transducer is a device for measuring the pressure and temperature (optional) of molten liquids in processes where plastic raw materials can reach high temperatures.
High temperature (up to 900 ℉) is the basic requirement for this type of measurement.
Avoid cold starts
Both the converter and the extruder may be damaged if the extruder is not brought to operating temperature before production begins. Sufficient “dwell time” must be provided for the plastic to transition from solid to molten state. Also, if a transducer is removed from a cold extruder, material may adhere to the converter tip, causing the diaphragm to rupture. Before removing the transducer, make sure the drum is hot enough to make any plastic parts soft.
Don't put too much pressure
While transducers are designed to withstand 50% overpressure (above the rated maximum), avoid risk by making sure you use a model designed for the range of extrusion operating pressures. An important rule of thumb is to use converters designed to withstand twice the rated pressure in your process. If so, the extruder must operate at an extremely high (and unsafe) pressure level in order for the transducer to fail.