Automatic control and energy-saving mechanism of internal circulation two-platen injection molding machine

Injection molding machine (IMM) is an advanced manufacturing equipment, which integrates mechanical, electronic, hydraulic and automatic control technology. IMM is the most important production tool and more than 80% of plastic products is manufactured by injection molding. In the new injection molding machine, the external circulation is omitted and hydraulic system is simplified because of the internal circulation cylinders used, thus significant energy saving and energy saving; At the mold-moving or mold-locking stage, different cylinders was used respectively which not only balanced force and velocity well but obtained excellent mold-locking properties and high processing stability. This paper details the automatic control principle of the internal circulation two-platen IMM, especially the internal circulation mold-locking cylinder and analyses its energy-saving mechanism; Finally the energy-saving effect is verified by experimental methods.