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Working principle and characteristics of electric screw press

       Electric screw press is a precision press. According to the different drive motors, it can be divided into switched reluctance servo drive, variable frequency drive and permanent magnet servo drive. Switched reluctance servo drives are highly reliable. Among them, the switched reluctance servo motor is durable and has high precision. The compression accuracy is higher than other pressure forming devices. The basic working principle is that the flywheel, the sleeve shaft and the nut of the screw press are often rotated together by the motor. The nut and the screw form a pair of movements, and the nut drives the screw and the slider to move up and down to generate an impact force. It is a process of obtaining a product by injecting a plasticized molten state (ie, a viscous flow state) into a closed cavity by means of a thrust of a screw (or a plunger). Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding - melt plasticization - pressure injection - filling mold cooling - mold extraction. After removing the plastic part, the mold is closed again for the next cycle. The PLC-based control system has multiple work blocks, and the strike speed of each work block can be adjusted by the corresponding power.

       Clamping →Precasting→Retracting→Nozzle Forwarding→Injection→Preserving Pressure→Nozzle Retreat→Cooling→Opening Mode→Ejecting→Opening the Door→Getting the Workpiece→Close the Door→ Close the mold.

       Molding machine, also known as the unpacking machine, refers to the automatic unpacking, forming, and folding of the lower bottom flap. At present, the lower part of the tape is pasted, and the box board which is stacked into cardboard is opened, and the bottom of the box is folded according to a certain procedure, and sealed with a tape and then delivered to the special equipment of the boxing machine. The automatic carton forming machine and automatic unpacking machine are the assembly line for automatic unpacking of large-volume carton, automatic folding of the lower cover and automatic sealing of the bottom tape. The machines are all controlled by PLC+ display, which is very convenient for operation and is essential for automated scale production. device of. The hit time of each block can be set by the corresponding counter. It can collect the instantaneous working state of the press, make logical judgments, and complete the control of motor control and braking, inlet and outlet devices, and pneumatic mode control. The press is fully automated by matching the feed and discharge devices of the various workpieces.