With the continuous development of COVID-19, people's demand for disposable tableware is increasing. Therefore, injection molding machines for disposable fork have become more popular.

An injection molding machine is one of the equipment commonly used in the plastics processing industry, and it usually operates for a long time. Therefore, how to ensure the normal and stable operation of the injection machine in continuous production is a problem worthy of attention for the manufacturer or the user of the injection machine. We have summarized some common faults and their solutions, hopefully it will help you.

👉After motor starts, the pressure gauge is under pressure

Causes and solutions:

• Amplify the board, use a multimeter to measure whether there is current passing, and repair the amplifying board.　

• The overflow valve is stuck. Remove the overflow valve to check and clean the overflow valve.

👉After the injection molding machine is turned on for a period of time, the oil pump has a loud noise and malfunctions

Causes and solutions:

• The quality of the suction pipe is not good: remove the filter to check whether it is deformed. Whether the suction pipe is stratified. Replace the oil pipe and filter screen.

• The filter is not clean: Check whether there are too many impurities in the hydraulic oil. Clean the filter.

• Oil pump wear: check the oil pump oil pan and rotor end surface. Replace the oil pump.

👉Crawling failure of injection molding machine

Causes and solutions:

• Poor lubrication conditions, "pause-slide-pause" appears: increase the amount of lubrication.

• Air immersed in the system: exhaust is required.

• Due to mechanical rigidity, parts are worn and deformed, causing friction changes and creeping: replace parts.

👉Hydraulic oil pollution of injection molding machine

Causes and solutions:

• Air mixed in the oil: The main banquet is not tight due to pipe joints, hydraulic pumps, and hydraulic cylinders. It is manifested by air bubbles on the fuel tank.

• Water mixed in the oil: it will turn the oil into milky white. The main reason is that the cooler is leaking.

• Solid impurities mixed in the oil: mainly chips, welding slag, rust and metal powder.

• Gelatinous substances produced in the oil: The main feast is that the seals are eroded by the oil or the oil is degraded, causing the oil to produce gelatinous substances, which often block the small holes.

👉 When opening the mold, there is a noise

Causes and solutions:

• Poor proportional linearity. Poor adjustment of the opening and closing time and position. Check the ramp up and down of the amplification board, adjust the ramp up and down of the amplification board, and adjust the time appropriately.

• The lubrication of the hinges of the clamping machine is poor. Check the lubrication of the collar, the second plate and the hinges, and increase the lubrication.

• The mold clamping force is too large. Check the clamping force when the mold is stressed, and reduce the clamping force according to the user's product situation.

• The deviation of the parallelism of the head and two plates, check the parallelism of the head and two plates. Adjust the parallel error of the second board and the head board.

• Slow turn and fast mold opening position is too small and the speed is too fast. Check whether the position of slow mold opening to fast mold opening is appropriate, and whether the slow mold opening speed is too fast. Lengthen the slow mold opening position and reduce the slow mold opening speed.

By the way

Lisong has been engaging in the R&D of injection molding machine, we also support bulk Injection molding machine for disposable fork. If you have interest in it, welcome to contact us.

📞Tel: 0574-62796888

📩Email: lisong@china-ls.cn