source： ADDTIME：2016-12-19 21:26:09 CLICK：1
Injection moulding is also called infusion moulding. During injection moulding, granules or powdery plastics are sent to the heated charging barrel through the hopper of injection moulding machine and become molten state through heating and fluxing, and the melted granules or powdery plastics shall be injected to the low-temperature and closed mould cavity through the nozzle at the end of the hopper under the pressure of screw. Shape given by mould cavity will be maintained after cooling and curing and then colloid can be taken from the cavity, thus a processing cycle is accomplished.
Advantages: short period and small amount of energy consumption when moulding, high-precision products and through this process, complex products can be formed into at one time
Disadvantages: high cost of the mould, not suitable for small-batch products
Related products: chopped strand and thermoplastic direct roving