SU1281433A1 - Control system for casting machine injection mechanism - Google Patents

Abstract

The invention relates to injection molding machines for plastics processing, can be used in the chemical industry. The purpose of the invention is to increase the speed of the system and its reliability. For this, the injection machine control system includes an injection cylinder 3 with cavities A and B injection and decompression, respectively, a vrash hydraulic drive 5, auger, switch of active process areas 7 of injection cylinder 3, lines 9, 10, 12 and 13 inlet, a drain line 16, a drain valve 14, control pilots 17, 18, 21, 22 and 23 with electromagnets EM1, EM2, a program control unit I9, an electromanufacturer 20. The switch of active process areas 7 is designed as a shut-off valve Gentry and 8 lie independent drivers 17 and 18 control. The decompression cavity supply route 13 is equipped with a drain valve 14 associated with the removal of the check valve 15, the hydraulic engine 5. The drain of the hydraulic engine 5, which is stirred in the main line 16. The system allows for adjusting the sub-pressure with expanded technological capabilities, differential and non-differential injection connection with a smaller number of devices management Thus, when the injection mode is on the area Rf, fluid is supplied to the shut-off valves 8 and 11, the pilot 17 is turned on and the shut-off valve 8 is opened. At the same time, the shut-off valve 11 is closed, but the drain valve 14 is open. The working fluid enters the cavity A of the injection, from cavity B the decompression is drained through the drain valve 14. When the auger retracts, the back valve 8 is closed, the stop valve 11 is open, the drain valve 14 is closed. The working fluid enters the cavity B decompression. When operating in differential mode, the shut-off valves 8 and 11 are open, the working fluid enters the cavities A and B, the drain valve 14 is closed. Drain from the hydraulic engine 5 enters the cavity B. I Il. I (Oh Yu 00 her co

Description

The invention relates to the field of injection molding machines for plastics processing and can be used in the chemical industry.

When the auger 1 retract mode is turned on, pilot 18 is turned on, pilot 17 is turned off, shut-off valve 8 is closed, shut-off valve 11 is opened, drain valve 14 is closed. The working fluid enters the decompression cavity B. The auger 1 is retracted to the bottom, adi Rdek.

For operation in differential mode with Rvpr. - Rlekom. include pilot 17

and 18, by opening the shut-off valves 8 and 11, 10 the working fluid enters both the injection cavity / 4 and the decompression cavity B, while the drain valve 14 is closed. The pressure value of the valve 6 is adjusted by the load head turned on by the pilot 23, with the pilot 21 turned on.

The aim of the invention is to improve the speed of the system and its reliability.

The drawing shows schematically the control system of the injection molding machine mechanism.

The injection mechanism contains a screw 1, placed in a plasticizing cylinder 2, an injection cylinder 3 with a differential piston 4 and injection cavities A and decompression B, a drive hydraulic motor 5

rotation of the auger 1 of valve 6, control of material 5, pilots 17 and 18 turn off the protective pressure in the cavity of injection A, switch valves 8 and 11, the drain valve reads 7 active technological lines, and-14 is open.

Dei hydraulic cylinder 3 injection, made Hydraulic 5 rashaet auger 1 and drain

in the form of a shut-off valve 8, installed from the hydraulic engine 5 through the main line 16, which is connected to Q through and the return valve 15, goes to the injection section A of the check valve 11, the decompression stage B with the force P Rdeco “ .X installed in the highway x 12 and 13 under-x Rnast.pruzh.kzp.i. In the cavity of injection A

water to the decompression cavity B and the drain is supported by setting valve 6 of valve 14 installed in the pipeline by the pilot 22 with the pilot 21 turned on. 13 supply to the decompression cavity B and Thus, the proposed system

The check valve 15, 25 connected with the tap-off works in a much more large-flowed-placed discharge in the main line 16 with fewer engine 5. The shut-off valves 8 and 11 are controlled by independent pilots 17 and 18 with electromagnets EM 1 and EM 2. The drain valve 14 is controlled by the pilot 18. The software-control device 19 is connected to the pilot pilots 17 and 18 via the electrical command device 20. The increased-pressure pilots 21-23, the backpressure pressure and the reduced pressure correspond to venno serve to configure the valve 6.

The system operates in the following sequence in different modes.

When the injection mode is on the Rasch square, the valve 6 is adjusted by the loading head, 4a with a device — through an electric command pilot 23, with the machine turned on, with the device turned on so that, in order to pilot 21. From the power source, the liquid is supplied to the shut-off valves 8 and 11. According to

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ve devices that provides system performance and increased reliability.

Claims (1)

Invention Formula A injection molding machine control system, comprising an injection cylinder with injection and decompression cavities, a screw rotation drive hydraulic motor, a switch of the active process areas of the injection cylinder, an injection line to the injection and decompression cavity, a drain line, a check valve, control pilots with electromagnets associated with the software for improving the speed of the system and its reliability, the switch of the active technological areas of the injection hydraulic cylinder is designed as a shut-off valves with independent control pilots installed in the injection and decompression supply lines, the supply line to the decompression cavity is provided with a drain valve connected to the control pilot connected with a return valve in the hydraulic engine discharge line. the command from the software control device 19 through the electric command device 20 turns on the pilot 17 and opens the shut-off valve 8. The pilot 18 keeps the shut-off valve 11 closed, but opens the drain valve 14. The working fluid enters the injection cavity A. Material is injected on the area From the cavity decompression B is draining through the drain valve 14. When the auger 1 retract mode is turned on, pilot 18 is turned on, pilot 17 is turned off, shut-off valve 8 is closed, shut-off valve 11 is opened, drain valve 14 is closed. The working fluid enters the decompression cavity B. The auger 1 is retracted to the bottom, adi Rdek. For operation in differential mode with Rvpr. - Rlekom. include pilot 17 and 18, by opening the shut-off valves 8 and 11, the working fluid enters both the injection cavity / 4 and the decompression cavity B, while the drain valve 14 is closed. The pressure value of the valve 6 is adjusted by the load head turned on by the pilot 23, with the pilot 21 turned on. material pilots 17 and 18 shut off the valves 8 and 11, the drain valve 14 is open. carries out work in a much larger number of modes with a smaller number of using an electric command device, but with the fact that, in order to ve devices that provides system performance and increased reliability. Invention Formula The injection machine control system, comprising an injection hydraulic cylinder with injection and decompression cavities, a screw rotation drive hydraulic motor, a switch of the active process areas of the injection hydraulic cylinder, an injection and decompression pipeline, and a drain line, check valve, control pilots with electromagnets, associated with the software-control device - through the electric command and control device, with the fact that, in order to speed control system and its reliability, the switch of the active technological areas of the injection hydraulic cylinder is made in the form of shut-off valves with independent control pilots installed in the supply lines to the injection and decompression cavities, and the supply line to the decompression cavity is provided with a drain valve connected to the control pilot, connected with a non-return valve, which is located in the hydraulic engine drain line.