The research breakdown discipline for make maintenance countermeasure and is very beneficial to establish a scientific system of maintenance. In the use of the injection molding machine, the performance or condition with the used time goes to gradual decline. Many fault before happen have some warning, this is called latent faults, which can identify the physical parameters indicate a functional fault it will happen, functional fault indicate injection molding machine loss the performance standards.
Injection molding machine fault rate change over time, often called the bathtub curve, injection molding machine fault rate change over time divided into three stages: early fault, occasional fault and depletion of the fault.
Early fault
Injection molding machine at an early stage, began the fault rate is very high but the fault rate change over time goes to gradual decline, early fault for the mechanical products, also called run-in period. This time length, according to products、system design and manufacture quality to decide. This time happen fault, mainly by the design、manufacturer defects caused, or used environment.
Occasional fault
Injection molding machine into occasional fault, fault rate is about at the steady state, tend to the value. During this time, fault happen is random, in this occasional fault, injection molding machine fault rate is the lowest and stable. So it can say that is the injection molding machine best work time. This stage is called the effective life, occasional fault, it cause more by design, improper use and maintenance is poor.
So through improve design quality、 improved used management、strengthen maintenance, can reduce the fault rate to the lowest level.
Later used in the injection molding machine, the fault rate begins to rise. This is because the injection molding machine parts wear, fatigue, aging, corrosion caused. If in the inflection point that is wear and tear fault to overhaul the beginning, you can cost-effectively reduce the failure rate.
Wear out fault period
Later used in the injection molding machine , the fault rate begin to rise, this is because the injection molding machine parts wear, fatigue, adding, corrosion caused.
