Why Do High-Temperature Melt Pressure Transducers Fail Easily How to Use Melt Pressure Transducers Correctly

 

Why Do You Need a Melt Pressure Transducer to Measure Extrusion Pressure?

A melt pressure transducer is essential for improving extruder output, melt quality, and production safety while protecting your machinery. To meet product quality standards-such as dimensional accuracy and surface finish-and reduce material waste, maintaining consistent processing pressure is critical.

In extrusion systems, melt pressure transducers enable everything from single-point pressure monitoring to full-line pressure profiling. These devices integrate with instrumentation for data logging, alarm triggering, corrective action alerts, and process control communication.

Key Applications of Melt Pressure Transducers:

Plastic Machinery

Food industry (Mercury-free NTX technology models)

Pharmaceutical industry (Mercury-free NTX technology models

Pipe Machines

Cable coating industry

Since melt pressure transducers are sensitive components, improper installation or maintenance can lead to premature failure. Follow these 7 tips to extend their lifespan and reduce downtime:

Tip 1: Proper Installation

Most melt pressure transducer failures stem from incorrect mounting holes. If the hole is too small or misaligned, the diaphragm may deform, causing leaks or inaccurate readings. Always use manufacturer-recommended drilling/reaming tools for hole preparation and cleaning.

Tip 2: Keep Mounting Holes Clean

Remove all plastic residue from the sensor hole before reinstalling the melt pressure transducer. Residual hardened plastic can rupture the diaphragm during reinsertion. Use dedicated cleaning tools for this task.

Tip 3: Optimal Positioning

Install the melt pressure transducer on the barrel, before screen changers, around melt pumps, or at the die. The diaphragm must align flush with the inner wall-protrusion causes material buildup, while recess risks screw contact damage.

Tip 4: Gentle Cleaning

Always remove melt pressure transducers before scrubbing the barrel with wire brushes or harsh chemicals. Clean probes with non-abrasive cloths while the

Tip 5: Maintain Dry Conditions

While standard melt pressure transducers tolerate harsh extrusion environments, most aren't waterproof. Prevent coolant leaks from barrel jackets to avoid moisture damage.

Tip 6: Thermal Awareness

Never start extrusion below operating temperature-it risks damaging both the machine and melt pressure transducer. Similarly, only remove sensors when the melt is hot to prevent material adhesion and diaphragm peeling.

Tip 7: Prevent Overpressure

Even if a melt pressure transducer can handle 50% overpressure, select a model with a range double your line's maximum pressure for long-term reliability.