Injection molding machine operation and maintenance rules

The operation and maintenance of the injection molding machine is dangerous, so professionals must be required to operate it

1. When using the เครื่องฉีดขึ้นรูป, you must pay attention to the safety of the operation. Please check the safety of the machine, the safety of the ejector rod and the reliability of the safety door at the beginning of each operation. When the machine is running, remember not to put your hands into the clamping mechanism. When taking products, the safety door must be opened, and the safety door can only be closed after confirming the safety of personnel and no foreign objects in the mold. นอกจากนี้, the hand cannot reach between the nozzle and the mold gate during operation. When repairing the mold, turn off the oil pump motor.
2. When molding products, due to the variety of raw materials, the size and shape of the molded product, the requiredฉีด แรงหนีบ is also different. When adjusting the mold, please adjust according to the minimum clamping force actually required. ทางนี้, power consumption can be saved and the service life of the machine can be significantly extended.

3.Pressure adjustment of the hydraulic system should be carried out separately according to the requirements of their respective actions. It should not be too high. Reasonable use of pressure will help reduce energy consumption and extend the life of the machine. การพยายามละลายพลาสติกเทอร์โมเซ็ตครั้งที่สองจะส่งผลให้วัสดุไหม้ได้, the position of each limit switch should be adjusted according to the requirements of the molded product. Especially the adjustment of the switching point from the injection to the holding pressure process must be paid attention to, otherwise it may cause insufficient filling of the product or excessive internal stress and flashing of the product, and even cause mold expansion, making it difficult to open the mold.

4. When there is no material in the ใช้ทาก "จำลอง" เพื่อสอดเข้าไปในปลายหัวฉีดเพื่อป้องกันการไหลที่แท้จริงของวัสดุหรือbarrel, it is not advisable to use a high screw speed (preferably below 30 rpm). After the material is filled with the screw groove (when the burnt material is extruded from the nozzle), the screw speed is increased to the required value to avoid scratching the screw or barrel due to excessive idle speed or too long time. ถึง
5. Barrel is heated from room temperature to the required temperature and kept for about 10 minutes before starting the screw for feeding to ensure that the residual cold material is fully melted and avoid damaging the screw. ถึง
6. The safety valve of the oil pump in the machine has been adjusted at the factory, please do not change it casually.

7. The machine starts to run, when the temperature of the cooling water rises by 5-10°C (when there is no water in the cooler, it must be filled with water first). Gradually open the water valve of the cooler, and adjust the water volume during use to keep the oil temperature below 55°C; when turning on the cooler, do not open the cooling water inlet valve quickly, because when a large amount of cold water flows through the cooler, NS “supercooling layer” with very poor thermal conductivity will be formed on the surface of the cooler tube. Even if a large amount of water enters the cooler in the future, a good cooling effect will not be achieved.
   8. Pay attention to the lubrication of the machine and strictly implement it according to the operating requirements. Running under the condition of oil shortage will severely wear the parts, especially the connecting rod and steel sleeve of the clamping mechanism. If the oil is short, it may be bitten and cannot work. When changing the mold to perform the “mold adjustment” operation, you must first confirm that the four adjustment nuts of the back template have been filled with sufficient lubricating grease containing molybdenum disulfide. ถึง
8. The threaded parts of the heating and plasticizing parts such as the barrel and screw work at high temperatures. When disassembling, the threaded parts must be coated with heat-resistant grease (red lead or molybdenum disulfide) to avoid seizure and inability to disassemble. (The screw head thread is left-handed thread). ถึง
9. mold mounting surface of the template has a high machining accuracy. Please do not use molds with poor mounting surface and parallelism, and mounting screws with poor threads, so as not to damage the performance of the clamping mechanism and damage the template.
10. Please do not leave the mold in the high-pressure clamping state for a long time (more than ten minutes) for the two planes of the mold, so as not to cause the connecting rod lock and the steel sleeve to cut off the oil, which may make the mold unable to open (this point should be paid more attention to for ten minutes when the power is cut) . ถึง
11. Always keep the mutual starting surfaces clean. ถึง
12. At the end of each processing:

(1) Close the hopper blanking plate, adopt the “manual” operation mode, the injection seat moves backward and repeats the pre-plastic feeding and injection, the remaining material in the barrel is discharged as far as possible, and the corrosive materials need to be passed with special materials. The tube cleans the screw. ถึง

(2) Using “manual” operation mode, close the mold so that the place is in a free state (not fully locked state). ถึง

(3) Cut off the heating power supply, turn off the oil pump motor, and always remove the power supply and cooling water. ถึง

(4) Do the cleaning and maintenance of the machine. ถึง

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14. Recognize the nameplate of each switch during operation, and do not misuse it to avoid damage to the parts. ถึง
15. Electric heating coil may become loose due to heating and expansion during use. Please pay attention to frequent inspections during use and tighten at any time. ถึง
16. Probe of the thermocouple should be in good contact with the end of the temperature measuring hole of the barrel. Check it before driving. When the contact is found to be poor, it should be tightened at any time.

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