Polyurethane Technology

Precise Metering With Flowmeters: How It Cuts Scrap

A small polyol/isocyanate ratio deviation means a faulty part. How real-time gram/second flowmeter tracking affects production.

In polyurethane, product properties such as hardness, density and surface quality depend on polyol and isocyanate mixing at the right ratio. A flowmeter measures the actual amount of each component passing through the line and verifies that ratio continuously.

Isn’t pump speed enough?

Pump speed gives the theoretical flow, but changes in temperature and viscosity, pump wear and clogged filters change the real flow. A flowmeter shows these deviations instantly, and the control system can correct them.

Benefits

  • No parts made with the wrong ratio
  • Less wasted material
  • Repeatable quality from batch to batch
  • Early detection of faults such as pump wear or clogging

The 0.003-precision flowmeter systems used on Polymix machines keep the chemical components of every part under real-time gram/second control. Flowmeters can also be retrofitted to your existing machine as part of an overhaul.

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