The most widely used injection molding machine is a pump dosing pumps,Plastic pallet mould its fuel supply is constant. However, the injection molding machine operation, flow and pressure needed to be constantly changing. Quantitative changes in pressure and flow pump, which is by the flow proportional valve and a pressure valve to regulate the excess fuel back into the tank through the relief valve. This situation, on the one hand is exacerbated by the valve and pump wear, resulting in temperature rise, motor noise is too large.
