1.The life of injection molding. The so-called life of injection molding, injection mold is that on the premise of ensuring product quality, the total number of plastic parts processing, including the repeated grinding and replacement of wearing parts of life. Total production of plastic parts injection mold design stage in general should be clear of the die for die design life, i.e.. Any mold will damage, always end of life, but the damage in different forms. In general, the work surface damage in the form of: friction damage, fatigue damage, plastic deformation, cracking, bite. 2.factors affecting the life of injection molding. End of life of injection molding, and a variety of factors, the main factors affecting the service life of the die has the following: Die materials. Large die life and material, production quantity is big, the load of working time for more material requirements are also higher, therefore, should choose strong bearing capacity, service life long high performance die materials. However, the need to pay attention to is, die materials accounted for about 25%-30% in the cost of production, so can't choose good material, for carrying small mold parts available slightly poor material. Die structure. A large structure mould of the mould life, reasonable structure helps to improve the bearing capacity of the mold, improve the mold life. Such as the use of the guide mechanism and reliable, and can effectively avoid the mold die bite; avoid the stress concentration and the fillet, the mold can withstand strong pressure die forming, because most easily from the stress concentration at the crack. Therefore, the selection and processing of mould structure is appropriate, affecting the life of mould is very large. The quality of mould processing. Mould parts, processing methods are not the same, mainly in forging, machining, electrical discharge machining, heat treatment, polishing etc.. In these processing are likely to make the parts injured and involving the die life, micro cracks as the electrical discharge machining process cooling resulting in improper; heat treatment due to uneven heating throughout the performance of different parts; forging due to improper temperature control crack metal internal organization; polishing is not enough, so that parts of the surface rough and the remnant marks and so on, the defects of die wear resistance, fracture resistance, anti fatigue ability will bring significant impact, thus affecting the service life of die. Die working state. Injection mold at work, frequently after closing, locking, injection, holding pressure, cooling, mold, ejection process, in this process, need to ensure that each work reliably and airy flexible working, therefore, need to make the moving parts without hindrance to movement, and has reliable lubrication, requirements for operator often pay attention to mold maintenance and maintenance, to make it in the best working condition. The status of equipment. Injection molding machine performance is good or bad, have great influence on the life of injection mold, injection mold of the various movements, is done by the relevant agencies on the molding machine, if the injection molding machine in the mold is closed after oblique, or force is too large, or action is not accurate, so that the mold collision or eccentric force, mould will damage, its life will be greatly affected. |