molding is compression molding of the abbreviation. it’s a processing method that plastic or rubber compound in the closed cavity with the help of heating, pressure then finish products.
generally to place the powder, granules, pellets, flakes, and even preformed with articles of similar shape in the cavity of the heated mold, and then closed to pressure, to form and cure, then remove the mold. the method is particularly suitable for the molding of thermosetting plastics. the disadvantage is the long production cycle, low efficiency, size accuracy is low.
major equipment:
there are presses and molds. the role of the press is to add pressure to the plastic through the mold. in the rubber processing, the press is called flat vulcanizing machine. the main parameters include nominal tonnage, platen size, working stroke and plunger diameter, which determine the area, height or thickness of the molded product, and the maximum pressure can be achieved. according to its structural characteristics, molds can be divided into three type of overflow, not overflow and semi-overflow, the semi-overflow is be used most.
