Failure of injection molding machine
- According to the fault status, the fault can be divided into:
- Progressive fault. It is caused by the gradual deterioration of the initial performance of the injection molding machine. Most of the faults of the injection molding machine belong to this type of failure. This kind of fault is closely related to the wear, corrosion, fatigue and creep process of electronic control and hydraulic mechanical components.
- A sudden fault occurs. It is caused by various adverse factors and accidental external influences, which are beyond the limits that the injection molding machine can bear. For example, the screw is broken due to the overload of the cylinder into the iron; Breakdown of electronic plate of injection molding machine due to high pressure string. Such failures often occur suddenly, without any warning beforehand.
The sudden failure mostly occurs in the use stage of injection molding machine, which is often caused by defects in design, manufacturing, assembly and material, or operation errors and illegal operations.
- According to the nature of the fault, it can be divided into:
- Intermittent fault. Injection molding machines can lose some of their functions in a short period of time, and can be restored with a little repair and debugging, without the need to replace parts.
- Permanent fault. Some parts of the injection molding machine have been damaged and need to be replaced or repaired before they can be used again.
- According to the fault impact degree, it can be divided into：
(1) Complete failure. Causes the injection molding machine to completely lose function.
(2) Local fault. Causes the injection molding machine to lose some function.
4. According to the cause, the fault can be divided into:
(1) Wear failure. Failure due to normal wear and tear of an injection molding machine.
(2) Misuse fault. Failure caused by improper operation or maintenance.
(3) Inherent weakness fault. Due to design problems, the injection molding machine appears weak links, in the normal use of the fault.
5. According to the risk of failure, the system can be divided into：
- Dangerous fault. For example, the safety protection system loses its protection function due to failure when it needs to be operated, resulting in personal injury and injection molding machine failure; Hydraulic control system failure caused by the failure of the fault.
- Security failure. For example, the security protection system takes action when no action is needed; Failure to start an injection molding machine when it cannot start.
- According to the occurrence and development law of injection molding machine failure, it can be divided into：
- Random failure. The time of failure is random.
(2) A regular fault occurs. The occurrence of faults has certain regularity.
Each type of failure has its main characteristics, which are called failure modes, or failure states. The fault states of various injection molding machines are quite complex, but they can be summarized as follows: Abnormal vibration, mechanical wear, the input signal does not let the computer to accept, the electromagnetic valve no output signal, mechanical hydraulic components rupture,, proportion of linear disturbance, oil pump, hydraulic pressure drop, hydraulic leakage fault, hydraulic circuit noise, aging, abnormal sound, degradation of oil, no output power supply pressure drop, amplifier board, temperature control and others. Different types of injection molding machines have different proportions of failure modes.
