【正文】
t slow down machine speed cannot accurate positioning, impact may damage the machine. When the mould opened, putting forward movement, promote the parts. When putting back, all molding cycle standards are reaching, then next shape cycle can begin. Basic injection cycle as follows: shut the mould injection plastic injection device that moves back determination transport cavity introducing parts. Some machines is from motor instead of hydraulic press or both. The cooling channels, assist cooling mould and plastic heat cure. Cooling undeserved can cause distortion forming. When the mould parts in the mold open, with the assistance of the internal putts burst open, and shape cycle pleted. Resin or note billet model of the raw material, usually in pills or particle forms are provided. Resin balls into a great leakage at the bottom of the hopper, hopper and cylindrical level material barrel connections. In a nitrogentreated barrel within the screw by motor rotation, raw materials particles will screw thread slot fill. The screw thread depth to one end of the mould has heating decreases, pression plastic. When screw rotation, plastic particles by screw drive advance, and bear melting needed extreme pressure and friction. In the process of melting, during the external nitrogentreated barrel with resistanse wire to assist in heating and temperature control. Through the flow into the mold cavity plastic will solidify, forming an additional framework. This by molten residual material position of the framework and melting resin flows from hopper wushan, it and cavity mould protrusion parallel, But with the direction of vertical shunt presses the tao, used for molten plastic relay to the gate. Gate and runner system can be cut, twisting and reuse, sometimes in line beside. By institutions Some mould are designed to automatically from parts of the form. China plastics processing enterprise star ROM the cloth, throughout the country, the technology of equipment level irregular, most processing enterprises equipment all need technical reformation. In recent years, our country plastic machinery indust