This is accomplished by designing a gasket to the parting line and quickly vacuuming the many cavities using a vacuum pump. However, in the event cooled too quickly, it will absorb excessive heat from the gate section of the mold, resulting in not whole vulcanization. Cold runner product is used when molding LSR. If the move path is too hot, the compound may commence to cure before injection. Many manufacturers currently provide an injection nozzle which includes a gas-operated switch as a standard device and may be set at various positions inside mold. Some injection molding equipment allow operation under varying shutting forces, which allows the processor to be able to close the mold at low pressure until 90%-95% from the cavity is filled with LSR (makes air easier to discharge) after which it switches to higher The concluding force prevents the silicone plastic from swelling and overflowing. Once the vacuum has climbed to the rated level, the mildew is fully closed and treatment begins. The rubber injection nozzle is controlled by way of needle valve for forward flow. Whether a cold runner system is used, it cleaning mould is important to establish a powerful temperature interval between the hot mold cavity as well as cold runner. By processing products in such a way, it is not necessary to remove the glue injection path, thereby avoiding increasing the labor intensity from the work and sometimes avoiding a lot of material waste.