The study of injection molding functions or states gradually declines with the expansion of the use time. There are some precursory information will be shown when injection molding machines errors occurred. These precursory information is also called potential fault, which identifies physical parameters indicating that a functional failure is about to occur, functional faults indicate that the injection molding machine has lost the predetermined performance standards.
The change of the injection molding machine errors rate with time is often called the tub curve. The failure rate of the injection molding machine is roughly divided into three phases: early fault, occasional fault period and lossy fault period.
1. Early fault period
The injection molding machine is in an early failure period, and the failure rate is high, but the failure rate of failure with time is rapidly decline, and the early fault period is also known as the mechanical product.
The length of this period of time is different from the design and manufacturing quality of the injection moulding machines. The injection molding machines failure of this period is mainly caused by the design, manufacturing defects, or inappropriate use environments.
2. Occasional fault period
Injection molding machines come to a problem, and the failure rate is substantially in a steady state, which tends to set the value. During this time, the fault occurs is random. In the occasional fault period, the injection machine is the lowest, and stable. Therefore, it can be said that this is the best state period of the injection molding machine or a normal working period. This section is called effective life.
The fault period of the fault period is more due to design, improper use and repair. Therefore, by improving the design quality, improve usage management, strengthen monitoring and diagnostics and maintenance, the failure rate can be reduced to the lowest level.
3. Lossy fault period
In the last stage of injection molding machine, the injection molding machines errors rate begins to rise. This is due to the wear, fatigue, aging, corrosion, etc. of the injection molding machine components. If you have an overhaut at the start of the abutment, it is economically and effectively reduced the fault rate.
Three stages of changes in the failure rate of injection molding machines, truly reflect the regulatory machine from running, commissioning, normal operation to overhaul or scrap failure rate, strengthening the daily management and maintenance of injection molding machines, can extend the occasional fault period. Accurately find an inflection point to avoid excessive repair or repair range to achieve the best investment benefits.
