“With our test benches for the plastics industry, the pressure is built up using a technology that is faster, more precise and requires less maintenance than conventional systems,” says Johannes Montag, Head of Sales at Poppe + Potthoff Maschinenbau. For this purpose, two test circuits with different operating modes were combined:
A specially developed, wear-free fine control method with a tolerance of +/- 0.1 bar enables a very precise, freely programmable and repeatable pressure increase up to 50 bar. In a second test circuit, a pneumatically driven pressure intensifier operates, with which a pressure of up to 400 bar can be generated.
With up to 100,000 measured values per second, the burst pressure of a component with an expansion volume of up to 20 liters is determined precisely. Measurement data acquisition and visualization is performed with LabVIEW from National Instruments, which has a serial interface for data exchange. The test requirements are entered via a touch panel. The test medium is tap water or test oil.