Introduction to the control process of the hottest

Xs-zy-125 injection molding machine control process introduction

1 mold closing and mold opening

(1) slow mold closing: electromagnets YA2 and ya9 are energized. The large pump unloads, and the pressure oil delivered by the small pump enters the upper chamber of the mold closing hydraulic cylinder through valves 6, 19 and 17, pushing the piston down to realize slow mold closing

(2) fast mold closing: electromagnets YAL, YA2 and ya9 are powered on. The pressure oil delivered by the small pump passes through valve 5 and valve 6} respectively, and then passes through valves L9 and 17 to the upper chamber of the mold closing hydraulic cylinder to push the piston to realize

rapid mold closing

(3) slow mold opening: electromagnets YA2 and ya8 are electrified. The large pump unloads, and the small pump sends the pressure oil through valves 6, 19, 17 and 18 to the lower cavity of the mold closing cylinder to push the piston to realize slow mold opening

(4) quick mold opening: YAL, YA2, ya8 are powered on. Both the large and small pumps work, and the pressure oil delivered from the mountains is closed by valves 5 and 6 respectively, and then enters the lower cavity of the clamping hydraulic cylinder through valves 19, 17 and 18 to realize rapid mold opening. The composition of the injection molding mechanism is shown in Figure 1, and the hydraulic transmission system is shown in Figure 2

2 injection seat moving forward and backward

injection seat moving forward: the average unit price of electromagnet YA2 and ya6cf02 bags is 18.4 yuan/kg, powered on. The forward moving speed of the injection seat does not need to be very fast, so the big 1 time is 6 Load measurement accuracy: the error is less than ± 0.5% of the indicated value Pump unloading, as long as the small pump supplies oil. The oil delivered by the small pump enters the injection seat through valves 6 and 16, moves the right chamber of the hydraulic cylinder, pushes the piston, and drives the injection seat to move forward. The injection seat retreats: the electromagnets YA2 and ya7 are powered on, the large pump is still unloaded, and the pressure oil delivered by the small pump enters the injection seat through valves 6 and 16 to move the liquid fatigue life - before fracture, press the left chamber of the cylinder, push the piston, and drive the injection seat to retreat

3 injection

electromagnets YAL, YA2, YA3, ya4, ya5, ya6 are all energized. Large flow of pressure oil is required during injection to complete the injection quickly. Therefore, the pressure oil delivered by large and small hydraulic pumps passes through valve 5 and valve 6 respectively, and then enters the right chamber of the injection cylinder through valve 9 and valve 15. The injection piston advances and pushes the screw forward to realize the injection action

4 pressure maintaining

electromagnets YA2, YA3, ya4, ya6 are energized. The oil circuit is the same as the injection oil circuit

5 pre molding

during the pre molding process, the screw forces the injection piston back. Adjusting the back pressure valve L5 can control the oil pressure in the right chamber of the injection pressure cylinder to produce the back pressure required for pre molding, so as to control the plasticization quality of materials. When the screw retreats to the preset metering position, press the lower limit switch and the pre molding stops