The function of the polypropylene spinning machine is to make the molten melt enter the spinning box through the bend, spray out by the spinning head through the metering pump, solidify into silk strips by condensation, and continue to cool through the tunnel and finally wound and form. Polypropylene spinning machine is mainly composed of spinning control system, biphenyl boiler control system, winding machine control system and other parts.

The spinning control system of polypropylene spinning machine mainly includes metering pump transmission control, oil pump transmission control and some on-site temperature and pressure signal acquisition records. Each spinning position on the site is equipped with a button box, and the start and stop of the metering pump and oil pump are controlled by the on-site button, so the enabling signal of frequency conversion is generally given by the terminal.

Since the metering pump and the oil pump are synchronous motors, the frequency conversion only requires general open-loop control. The difference between the metering pump and the oil pump control is that the metering pump is usually driven by the frequency converter, while the oil pump is driven by the frequency conversion.

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