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Based on the possible causes, common troubleshooting methods are as follows:

Cause of the malfunction	Way of resolving
The limit switch for the platen movement has been adjusted to engage with the stopper	Adjust the limit switch for the travel distance
The coil of the platen movement solenoid valve may have burnt out or foreign matter may have entered, causing the valve spool to be stuck and unable to move	Clean or replace the solenoid valve

The common causes of failure and the corresponding troubleshooting methods are as follows:

Cause of the malfunction	Way of resolving
The proportional valve wiring on the oil pump is loose or the coil is burned out	Check whether the proportional pressure valve is energized
Impurities clog the oil outlet of the proportional pressure valve on the pump	Remove the proportional pressure valve and clean out the impurities
The hydraulic oil is contaminated, and debris has accumulated on the surface of the oil filter, obstructing the flow of hydraulic oil into the pump	Clean the oil filter and replace the pressure regulator
The oil pump is experiencing internal oil leakage, which is caused by prolonged use, internal wear, or damage due to contaminated hydraulic oil	Repair or replace the oil pump
There is oil leakage from the oil gun, hose, and connections	Eliminate the sources of leakage
The oil system is seizing	Check whether the oil control valve spool is functioning properly

There are many reasons for product breakage in injection molding, and different approaches should be taken based on the specific cause. The common ones are as follows:

Cause of the malfunction	Way of resolving
Too much filling	Reduce the injection pressure, injection speed, and injection volume
The mold temperature is too low	Increase the mold temperature
The demolding angles are insufficient in certain areas	Perform mold maintenance
The finished product fails to be ejected smoothly during demolding	Perform mold maintenance
There is an insufficient number of ejector pins or they are improperly positioned	Perform mold maintenance
Localized vacuum formation occurs during demolding	The slow ejection speed during mold opening, consider installing air ejectors
There is insufficient release agent	Increase the amount of release agent
Poor mold design leading to excessive stress within the finished product	Improve the design of the finished product

Injection molding process, the occurrence of air bubbles inside plastic products is a common quality issue. Air bubbles may have negative impacts on the strength, appearance, and functionality of the products. Here are some common causes of air bubbles and corresponding solutions:

Cause of the malfunction	Way of resolving
In the finished product, the cross-section, ribs, or columns are too thick	Make changes to the product design or the location of the gate
The injection pressure is too low	Increase the injection pressure
The injection volume and time are insufficient	Increase the injection volume and injection time
The runner gate is too small	Increase the size of the runner and gate
The injection speed is too fast	Reduce the injection speed
The plastic contains moisture	The plastic needs to be thoroughly dried
The plastic temperature is too high, leading to decomposition	Reduce the plastic temperature
The mold temperature is uneven	Adjust the mold temperature
The cooling time is too long	Reduce the cooling time inside the mold
The back pressure is insufficient	Increase back pressure

In injection molding production, if there are flash or burrs on plastic products, corresponding treatment methods can be taken based on the following reasons: