Vertical injection molding machine is used in industry production tools. The machine’s plastics industry comprises an oil circuit using proportional valve control technology and switching valve control technology, two kinds of composition.
Vertical injection molding machine power saving analysis:
Vertical injection molding machine as a representative of the hydraulic drive equipment, in the cooling and discharge process, its load is almost zero, and cooling and discharge time accounted for the whole over the cycle of 30-60%.
According to past working experience, the energy loss caused by cooling and discharging overflow in injection molding machines is up to 30-65%.
The power consumption of the oil pump motor of the injection molding machine accounts for 60-75% of the power consumption of the whole equipment, which has energy-saving potential.
The hydraulic power part uses an ordinary three-phase asynchronous motor + quantitative pump hydraulic system.
The product molding process is generally divided into several stages: mold locking, injection, melting, holding pressure, cooling, mold opening, and material discharge.
Vertical injection molding machine using proportional valve control of the oil circuit characteristics:
After the operation of the oil pump motor, it runs at full speed and high load, and then the pressure and flow rate required for each stage of work are set through the proportional valve.
While the injection molding machine is in a production cycle, only high-pressure clamping and melting glue stage motor load, other stages of work motor load are generally more miniature.
Other stages of the oil pump motor to a constant speed to provide a continuous flow, excess hydraulic oil through the relief valve back to the flow, resulting in unnecessary waste.
Vertical injection molding machine using switching valve control of the oil circuit characteristics:
After the operation of the oil pump motor, the pressure and flow are not set.
When the various stages of clamping, injection, melting, holding pressure, cooling, and mold opening work in the oil circuit by the corresponding direction of the switching valve to open, complete flow work, and relief valve shut off.
When cooling and discharging, each stage of the direction switching valve is closed, the relief valve opens, and all the return flow, resulting in waste.