Process for producing polyurethane moldings

Details Process for producing polyurethane moldings Process for producing polyurethane moldings

2008-07-29

2008-07-29

Heitbrink, Jill L (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

C264S328600, C422S111000, C422S112000, C422S133000

Reexamination Certificate

active

10732108

ABSTRACT:
Cellular or compact polyurethane moldings are produced by conveying at least one isocyanate component and at least one polyol component by a metering machine in dispensing manner into a mixing chamber via component lines to form a polyurethane reaction mixture. Subsequently, the polyurethane reaction mixture is discharged from the mixing chamber into a mold. The pressures of the components are registered by means of pressure transducers in the component lines and are transmitted to a monitoring device. The temporal profiles of the pressures are compared with reference pressure values stored in the monitoring device. A malfunction is signalled in the event of deviation of at least one of the measured pressure profiles from the reference pressure profile beyond a predetermined tolerance threshold.

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