Injection molding machine operation and maintenance procedures

Date：2011/12/6 17:44:52

        1. when used in machine operation must pay attention to safety, began to check the machine for each operation of safety devices, insurance and security door ejector reliability. Machine running the process, keep in mind which can not reach into the clamping mechanism. In taking products, be sure to open the security door, security personnel in the recognition and no foreign body within the mold before you can close the safe door. In addition, the operation can not be inserted into the hand between the nozzle and the mold gate. In the repair of mold, close the pump motor.
        2. Molded products, due to the variety of raw materials, molding products, an area the size and shape of the different needs of the clamping force is different, according to the actual transfer mode when the minimum required clamping force adjustment. This can save power consumption and significantly extend the life of the machine.
        3. Hydraulic system pressure regulator according to the requirements of their actions were implemented, not too high, rational use of pressure, help to reduce energy consumption and extend the life of the machine. Similarly, the limit switch position, but also according to the requirements of regulation molding products. Especially during the injection to holding pressure switch point adjustment, must pay attention, or lack of filling products may cause or lead products generate excessive stress and flash, and even cause up mold, leaving the mold is difficult to open.
        4. The screw or barrel is no material, the screw should not be high speed (preferably 30 rev / min under). Screw the spiral groove to be filled with material (burning material from the nozzle exit out of time), then screw speed increased to the desired value, so as to avoid idle speed is too high or too long scratch screw or barrel.
        5. Cylinder heated from room temperature to the desired temperature, holding for about 10 minutes. To start the screw for feeding to ensure adequate residual melt cold material to avoid damage to the screw.
        6. Machine pump safety valve, has been adjusted at the factory, do not easily change.
        7. The machine starts running, when the cooling water temperature 5-10 ℃ after (when the water cooler should be subject to water-filled). Gradually open the cooler the valve, and in the course of regulation of water, the oil temperature is kept at 55 ℃ the following; the starting cooler, avoid rapid cooling water inlet valve open, because a lot of cold water flow through the cooler, the will form a layer of cooler tube surface very poor thermal conductivity of the "cold layer", even after large amounts of water into the cooler would not achieve a good result or cooling effect.
        8. Attention to the lubrication of the machine, according to operational requirements strictly enforced, in the case of running short of oil, it will seriously wear parts, especially the clamping of the connecting rod and steel sets, starvation may occur if the bite, and can not work. Replacement of the mold and to "transfer mode" operation, the template must be confirmed four adjustment nuts have been injected full of lubricants containing molybdenum disulfide grease.
        9. Plastics such as heated barrel and screw the threaded portion of the connection piece, because at high temperatures, disassembly, threaded parts are coated with heat-resistant grease to (red lead or second-rate of molybdenum) can not be killed so as to avoid disassembly . (Screw head and thread is left hand thread).
        10. Model of the mold mounting surface with high precision, do not use the mounting surface and the parallelism bad mold, and poor installation of screw thread, so as not to damage the clamping performance and damage the template.
        11. Do not install two flat die a long time (ten minutes or more) to die in a mode-locked state
State to avoid locking rod sets off the oil and steel, the mold may not be open (this is when a power outage more attention should be ten minutes).
        12. Keep the surface clean each start.
        13. The end of each process:
       (1) Close off the feed hopper of the flapper, a "manual" mode of operation, and repeated injections back seat to pre-feeding and injection of plastic, the material remaining inside the barrel as far as possible discharge.
       (2) a "manual" mode of operation, so that in a closed mold free state (not fully locked state).
       (3) cut off the heating power, turn off the pump motor, total power and cooling to the water.
       (4) prepare the machine for cleaning and maintenance.
       14. Understand the operation of the switch plate, not to misuse, so as not to damage the parts.
       15. Electric heating coil in use, due to heat expansion, may be loose, please pay attention to regular checks in use at any time to tighten.
       16. Thermocouple probe with the barrel temperature should ensure good contact with the micropylar end, before driving to check and found that bad, you should always tighten.
       17. Should seriously take a good ground, regularly check the insulation of electrical components to avoid electrical shock injuries.
       18. Check the low voltage circuit, use a multimeter.
       19. To prevent the injection molding machine temperature control instrument zero drift, the Ministry every six months by the manufacturer to inspect electrical calibration.

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