Precision injection molding, in the strict sense, refers to the size precision plastic injection molding machine production out of the,Can reach 0.01mm, usually between 0.01 ～ 0.001mm in an injection molding mode of production. The concept of "precision injection molding", mainly from the "conventional injection molding", along with the high speed development of polymer materials and microelectronic technology, highly integrated electronic circuit, makes the industrial equipment parts for the progressive development of high performance, high precision, light weight, small and miniaturization. Thus, precision plastic parts for high precision to meet the requirements, and has the advantages of machinery, mechanical properties and dimensional stability and good in mechanical, electronics, instrumentation, communications, instrumentation, automotive and aerospace industries, replaces the parts of high precision metal parts are widely used.
By the definition of precision plastic injection molding is known, limits of size precision plastic parts is very narrow. In fact, the plastic molding recognized within the industry, when the plastic parts dimension tolerance in 0.1mm, or that the size and tolerance in 0.1mm below, can be called precision molding, dimensional tolerances of parts can reach micron level, can be called the ultra precision injection molding.
The relative precision injection molding, dimensional tolerances of ordinary injection molding parts usually above 0.1mm, the size of the public.
Range is relatively wide, and with the increase of parts in bulk or weight, dimension and tolerance of parts will increase.
It is worth mentioning that, due to the nature of the material itself and the processing method is different, can't get precision metal parts and plastic parts.
Equal precision. The highest level of precision plastic products is three grade precision, namely the size tolerance of below 0.001mm, while the size of metal parts can be divided into fourteen levels, the machining accuracy is nine.