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Piston machines
Piston machines are suitable for metering PUR components containing abrasive fillers such as glass fibres or wollastonite. The component containing the filler is metered by means of a metering piston.
Principle
The component containing the filler is metered by means of a metering piston. This machine is available in four different models.
Technology
KraussMaffei offers four different piston machine models:
- One metering piston delivers a discontinuous stream
of the filled component (Hybrid).
- Two metering pistons for the filled component
deliver a continuous stream of the filled component
(Tandem Hybrid).
- One metering piston each is used for the polyol and
isocyanate components. This results in a discontinuous
stream of the two components (Comet).
- Two metering pistons in tandem permit a continuous
stream of the two components (Tandem Comet).
Customer benefits
- Piston machines provide an economical way of
processing abrasive PUR components.
- Production flexibility is increased.
- Even extremely low feed rates can be metered
precisely.
- Mould filling times are short because highly
reactive systems can be processed.
- With the Comet model, abrasive fillers can be
metered into both the polyol and isocyanate
component.
- Feed rates are very high thanks to the
combination of pump and piston metering.
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Puromat for high-pressure PUR
processing