How to classify the failure of the injection molding machine?

Update:16-07-2021
Summary:

Two-color injection molding machine can be divided into […]

Two-color injection molding machine can be divided into: (1) Complete failure. (2) Partial failure causes weak links in the injection molding machine. (3) Long-term failure, most of the failures of injection molding machines belong to this type of failure. This type of failure is closely related to the process of wear, corrosion, fatigue and creep of electronic control and hydraulic and mechanical components. (4) Sudden failure. Divided according to the occurrence and development rules of injection molding machine failures. (5) Misuse failures, such as: the screw is broken due to the overload of the iron material in the barrel. The failure is caused by incorrect operation and improper maintenance. Such failures often happen suddenly; there is no warning in advance. Due to design issues. It is often caused by defects in design, manufacturing, assembly, and materials; or caused by operating errors or illegal operations, and malfunctions during normal use.

Divided according to the nature of the fault, it can be divided into: intermittent fault. Divided according to the danger of the fault. It can be restored with a little repair and debugging, and there is no need to replace parts. For example, the safety protection system loses its protective function due to failure when it needs to act. Some parts of the injection molding machine are damaged. It needs to be replaced or repaired before it can be used again. Failure caused by the failure of the hydraulic electronic control system, etc. Divided by the degree of failure impact. For example, the safety protection system acts when no action is required. It can be divided into: gradual failure. Cause the loss of some functions of the injection molding machine.

Each type of failure has its main characteristics. The injection molding machine loses some of its functions in a short period of time, the so-called failure mode, which can be divided into: (1) Dangerous failure. The failure status of various injection molding machines is quite complicated, leading to The injection molding machine completely loses its function, (2) safety failure. (3) Abrasion failure, causing personal injury and injection molding machine failure.

Failure to start when the injection molding machine cannot be started. This effect exceeds the limit that the injection molding machine can withstand; according to the state of failure. Sudden failures mostly occur during the use phase of the injection molding machine, and the time of failure is random. It is caused by the gradual deterioration of the initial performance of the injection molding machine. The occurrence of failures has a certain pattern. It can be divided into: (1) Random failures, failures caused by the normal wear and tear of the injection molding machine. Breakdown of the electronic board of the injection molding machine due to high pressure. (2) There are regular faults, (3) Inherent weak faults.

Or the fault state is caused by various unfavorable factors and accidental external influences. However, it can be summarized as follows: abnormal vibration, mechanical wear, input signal cannot be accepted by the computer, solenoid valve no output signal, mechanical hydraulic components Rupture, proportional linear imbalance, hydraulic pressure drop, hydraulic leakage, oil pump failure, hydraulic noise, circuit aging, abnormal sound, oil quality deterioration, power supply pressure drop, no output from amplifier board, temperature out of control and others.
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