Guide to maintenance and update of central feeding system
In order to obtain qualified plastic products and ensure the safety of people and equipment, the central feed system management system is specially formulated as shown below.
1. Through the establishment and implementation of the central feeding system management system, adhere to the daily maintenance of the central feeding system, ensure the normal use of the central feeding system, eliminate hidden dangers of accidents, improve work quality and production efficiency, and ensure smooth production.
(1) Regulations for the safe operation of the central feeding system
1. It is not allowed to make operation methods that may cause personal injury or damage the central feeding system for any reason or excuse. Personnel who have not received training in operation skills and who do not understand the structural principles and performance of the central feeding system (that is, technicians who are not designated by the company) may not adjust the machine.
2. In the case where the hopper of the central feeding system does not discharge, it is forbidden to use metal rods and rods, and poke the hopper roughly to avoid damage to the material.
If the split screen, screen cover and magnet holder in the bucket are in the rotating state of the screw, it is very easy for the metal rod to be caught in the barrel and cause serious damage to the equipment.
3. It is strictly forbidden to start the central feeding system under load. After the central feeding system is started, it must be idle for 1 minute before it can be put into normal operation.
4. Before starting the central feeding system, preheat the plasticizing temperature to the set value and wait 3 to 5 minutes before driving the screw to melt the glue. It is strictly forbidden to touch the heating part with hands and other body parts.
5. No objects are allowed to be stacked in front of each electrical box and fire hydrant door to ensure that all evacuation channels are unobstructed.
6. No one should suddenly cut off the power supply of the normally operating machine (except for special reasons), otherwise it will damage the machine.
7. During operation, you can only lock the mold first and then enter the shooting platform.
8. When you go to work, you should check whether the central feeding system is operating normally, whether the process parameters are appropriate, whether the mold is firmly fixed on the central feeding system, the cooling device (mold cooling, blanking port cooling, action oil cooling) and the lubrication device are normal .
9. Do not climb onto the top of the machine or reach into the safety door when the machine is moving.
10. When the machine is shut down, the rubber material in the melted rubber cylinder should be shot clean, no excess material should be left, and it is forbidden to turn off the electric heating and power switch when the machine is under stress.
11. All the power supply of the central feeding system must be reliably grounded and connected to zero. The wire terminals, rod seats, etc. should be connected in a standardized manner and the insulation is reliable.
12. Be sure to follow proper mold clamping procedures when the machine is in motion. Especially the low voltage protection device must be adjusted to be absolutely reliable.
13. When cleaning the melt barrel, ensure the phase melting of the material and prevent the material from overheating and decomposition, and the "Refilling Operation Rules" should be strictly observed.
14. Strictly abide by "Mold Change Operation Rules" when changing molds.
15. During the crushing operation, the crushed products must be crushed one by one. It is strictly forbidden to pour the whole box (bag) into the crushing at one time, so as to avoid overloading the crusher or mixing foreign objects to damage the blade.
16. In the case where the hopper does not discharge, it is not allowed to use metal rods and rods, and poke the hopper roughly to avoid damage to the material.
If the split screen, screen cover and magnet holder in the bucket are in the rotating state of the screw, it is very easy for the metal rod to be caught in the barrel and cause serious damage to the equipment.
17. Before starting the machine, make sure that all safety devices are effective (safety lever position, safety stop, safety door limit switch, safety pulley and emergency stop switch). If there is any abnormality, it must be reported to the superior immediately for handling. Those who have not checked or risked starting before starting the machine shall bear all safety responsibilities and the management personnel shall take joint sanctions.
(2) Inspection and adjustment work items during the operation of the central feeding system
The safety protection devices on the equipment (such as mechanical lock levers, stop plates, various safety protection switches, etc.) are not allowed to move casually, nor are they allowed to be modified or intentionally rendered useless.
1. Clean the machine tool, workbench and ground debris, oil stains and dust, and keep the workplace clean and tidy.
2. Lubrication system: check the lubrication condition of each friction part (lubricating grease and oil injection machine).
3. Hydraulic actuation system: the oil quantity and temperature of the actuating oil (35 ～ 65 ℃), abnormal inspection of the sound condition of the hydraulic pump, and inspection of the solenoid valves and cylinder oil pipes.
4. Electric heating system: temperature setting and actual value, heating condition of electric heater, temperature control ON / OFF action, whether the nozzle thermostat is normal.
5. Security check:
①Whether the clamping action stops when the safety door is opened.
②Check whether the emergency stop button is malfunctioning.
③ The maximum value of the system pressure shall not exceed the specified value of 140kg / cm2.
④ The low-pressure protection action focuses on the low-pressure starting point position and mold-locking confirmation position for inspection and adjustment.
6. Injection structure action: Confirm the action of the injection melt, confirm the injection pressure, flow, position, time and screw rotation, adjust whether there is debris piled under the material tube, and tighten the screw clamp block to check.
7. Cooling system: Check the cooling water pipe device, pass the cooling water to confirm whether there is water leakage, and whether the oil cooler pipe is smooth.
8. Refrigeration system: Check the set value of chilled water temperature and the actual cooling effect.
9. Electrical system:
①Check the working environment of the electrical box such as temperature, humidity, dustproof, etc.
②Check the operation status of exhaust fan.
③Check the running status of the motor.
④ Check the setting of each limit switch, transfer switch and each timer.
⑤Check the operation panel and parameter settings.
10. Unlock the mold structure, whether the hinge action of the machine is smooth, smooth, and without abnormal noise, whether the dynamic fixed template is balanced, and whether the forces of the four tie rods are even.
11. Ejection structure: check the ejection times and stroke control.
12. Semi-automatic and fully automatic, pay special attention to the shedding status of the manufactured products, and check whether the movement is smooth and smooth.
13. The safety protection devices (such as mechanical lock levers, stop plates, and various safety protection switches, etc.) on the equipment are not allowed to move casually, nor are they allowed to be modified or intentionally rendered useless.
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