Plastic molding and transfer molding are the main molding methods of thermosetting plastics. The press and transfer molding machine used for moulding are the main forming equipment of various plastic products made of thermosetting plastics. The role of the press is through plastic mold on the plastic pressure, if the use of fixed-mode, but also has the opening and closing molds and the role of the ejector products. The presses for moulding are divided into two categories: motor presses and hydraulic presses. Because of the mechanical press of the manufacture, operation and repair are more complex than the hydraulic press, and not suitable for compacting large plastic parts, so gradually eliminated. The use of presses is basically hydraulic presses. The pressure medium of hydraulic press usually has two kinds of oil and water, the former is widely used in medium and small-sized equipments. Transfer molding equipment can be used with the same hydraulic press molding, but also can be used for special transfer molding machine. The transfer molding machine is actually a double pressure hydraulic press with two hydraulic cylinders. According to its structure can be divided into upper and lower double pressure type and right angle type two kinds.