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In the injection mold manufacturers how to choose?
by：CSSSLD
2021-01-23
Unlike other mould, plastic mould in the work of its working temperature between 150 ℃ to 200 ℃, general except under certain pressure, also affected by temperature.
According to the mold using conditions, the different processing method, the basic performance requirements of mold steel be summarized as follows:
excellent thermal stability.
injection mold parts shapes are more complex and difficult to processing after quenching, so try to choose the double color mould with good thermal stability, when the double color mould after heat treatment processing, due to the small linear expansion coefficient, heat treatment deformation is small, due to the size of the rate of change caused by the temperature difference is small, the microstructure and mould size stability, can reduce or cancel the processing, can guarantee the mould size precision can meet the demands of the surface roughness.
good machinability;
most of the plastic molding die, in addition to the EMD machining, also need a certain amount of cutting and fitter to repair. In order to improve the service life of cutting tools, and improve the cutting performance and reduce the surface roughness, must choose the right plastic die steel hardness.
excellent polishing performance;
high quality double color injection molding products, the cavity surface roughness value is small. If less than Ra0 injection mould cavity surface roughness requirements. 1 to 0. 25, less than Ra0 optical surface requirements. 01 nm, cavity need to be polished to reduce the surface roughness. Less impurity on select material requirements of steel material, no fiber orientation, organization fine and evenly distributed, should not appear when polishing pitting or orange peel defect.
enough enough surface hardness and wear resistance.
plastic mold hardness is in commonly 50 - Between 60 HRC, heat treatment after the mould should be enough to ensure that the surface hardness of mould stiffness. As a result of plastic packing and flow in the work to a lot of pressure stress and friction force, mould is asked to keep the stability of the shape and dimension precision, ensure the service life of mould have enough. Mold wear depend on the chemical composition and heat treatment of hardness of the steel, improve the mold to improve mold hardness abrasion resistance.
excellent thermal stability.
injection mold parts shapes are more complex and difficult to processing after quenching, so try to choose the double color mould with good thermal stability, when the double color mould after heat treatment processing, due to the small linear expansion coefficient, heat treatment deformation is small, due to the size of the rate of change caused by the temperature difference is small, the microstructure and mould size stability, can reduce or cancel the processing, can guarantee the mould size precision can meet the demands of the surface roughness.
good machinability;
most of the plastic molding die, in addition to the EMD machining, also need a certain amount of cutting and fitter to repair. In order to improve the service life of cutting tools, and improve the cutting performance and reduce the surface roughness, must choose the right plastic die steel hardness.
excellent polishing performance;
high quality double color injection molding products, the cavity surface roughness value is small. If less than Ra0 injection mould cavity surface roughness requirements. 1 to 0. 25, less than Ra0 optical surface requirements. 01 nm, cavity need to be polished to reduce the surface roughness. Less impurity on select material requirements of steel material, no fiber orientation, organization fine and evenly distributed, should not appear when polishing pitting or orange peel defect.
enough enough surface hardness and wear resistance.
plastic mold hardness is in commonly 50 - Between 60 HRC, heat treatment after the mould should be enough to ensure that the surface hardness of mould stiffness. As a result of plastic packing and flow in the work to a lot of pressure stress and friction force, mould is asked to keep the stability of the shape and dimension precision, ensure the service life of mould have enough. Mold wear depend on the chemical composition and heat treatment of hardness of the steel, improve the mold to improve mold hardness abrasion resistance.
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