① The molten part of the barrel structure used for thermosetting plastic molding is divided into two sections, which are improved to meet the requirements of the thermosetting plastic molding process. In order to ensure accurate temperature control at the front end of the barrel (discharge port end) and stability of the heating temperature, the low-pressure thermosetting injection molding machine uses thermal conductive medium oil or water boiling, and this temperature section is independently controlled; The two-stage barrel structure also facilitates the removal of finished products inside the barrel.
② The structure of the screw rod is: the thread depth is gradually deformed, the top of the screw rod head is conical, the height diameter L/D is 12-16, and the air compression ratio ε= 1.05-1.15.
③ The nozzle structure is a direct stroke with a diameter between 4-8mm, mainly for better ejection of thermosetting plastic raw materials with relatively high viscosity in the molten state:
④ The assembly gap between the diameter of the screw rod and the nominal diameter of the machine barrel should be low, and it is generally required to be kept between 0.1 and 0.2mm to avoid the stagnation and drying of the hot solid plastic solution.servo type injection molding machine.household plastic mold.
⑤ The temperature control regulations for heating and forming raw materials are relatively accurate and stable, and a temperature control instrument should be used to control the temperature of the grinding tool. A thermal insulation board is used between the grinding tool and the fixed fixed clamping mold template.precision core parts,
⑥ When forming the mold structure of the thermosetting injection molding machine, it should be equipped with a safety channel for the exhaust pipe or a locking position that includes the exhaust pipe function.plastic household mold.
by eleven