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What material processing and manufacturing plastic injection mold?
by：CSSSLD
2021-01-23
As is known to all, injection molding processing of injection mold material selection determines the quality of the injection molding processing is indispensable to the plastic molding processing link, the proportion of its in the mold production increased year by year, according to the statistics, the injection mold processing, manufacturing accounts for 33% of the whole forming die, therefore, its position in the national economy more and more important.
For plastics die life were the main influencing factors: the mould structure, mould materials, mould processing, mold working status and product quality parts status etc.
In the process, mold material itself and the performance of heat treatment, plays a vital role.
Ordinary injection mold material processing and manufacturing.
at present most of the carbon steel die steel due to low cost, easy to use, and has certain mechanical properties, application range is very wide. In addition to plastic die steel, including hard plastic die steel and other steel, the steel is very various, which are frequently used at present are sclerosis type plastic die steel, carburized plastic die steel and age hardening plastic die steel. Sclerosis type plastic die steel is applied when machining steel hardness rules, this kind of steel cutting function is admirable, and can be inner cavity treatment directly. Commonly used in a large number of plastic products processing, such as lens mold, calculated using 32 ~ 40 HRC hardness.
the mold material selection, manufacturing, and manufacturing.
exquisite polishing process function.
injection products quality, the cavity surface roughness value is small. If less than Ra0 injection mould cavity surface roughness requirements. 1 - 0. 25, less than Ra0 optical surface requirements. 01 nm, cavity need to be polished to reduce the surface roughness. Therefore, the choice of steel material impurity is less, the uniform arrangement, no fiber orientation, should not appear when polishing pitting or orange peel defect.
the outstanding thermal stability;
in the injection mold parts shape tend to be complex, difficult to processing after quenching, therefore, should try to choose the material with good thermal stability. Plastic mold processing after heat treatment, due to the small linear expansion coefficient, heat treatment deformation is small, standard rate caused by temperature difference is small, metallographic arrangement and stable standard mould, can reduce or stop the processing, the surface roughness and can ensure the accuracy of the plastic mold standard requirements.
at present most of the carbon steel die steel due to low cost, easy to use, and has certain mechanical properties, application range is very wide. In addition to plastic die steel, including hard plastic die steel and other steel, the steel is very various, which are frequently used at present are sclerosis type plastic die steel, carburized plastic die steel and age hardening plastic die steel. Sclerosis type plastic die steel is applied when machining steel hardness rules, this kind of steel cutting function is admirable, and can be inner cavity treatment directly. Commonly used in a large number of plastic products processing, such as lens mold, calculated using 32 ~ 40 HRC hardness.
the mold material selection, manufacturing, and manufacturing.
exquisite polishing process function.
injection products quality, the cavity surface roughness value is small. If less than Ra0 injection mould cavity surface roughness requirements. 1 - 0. 25, less than Ra0 optical surface requirements. 01 nm, cavity need to be polished to reduce the surface roughness. Therefore, the choice of steel material impurity is less, the uniform arrangement, no fiber orientation, should not appear when polishing pitting or orange peel defect.
the outstanding thermal stability;
in the injection mold parts shape tend to be complex, difficult to processing after quenching, therefore, should try to choose the material with good thermal stability. Plastic mold processing after heat treatment, due to the small linear expansion coefficient, heat treatment deformation is small, standard rate caused by temperature difference is small, metallographic arrangement and stable standard mould, can reduce or stop the processing, the surface roughness and can ensure the accuracy of the plastic mold standard requirements.
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