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Changshu smoothly da plastic products factory talk about extrusion die head design five keys
by：CSSSLD
2021-02-03
Plastic extrusion forming is one of the main points of the selection of mold, extrusion mold is directly related to the stand or fall of extrusion profiles for the produce of the stability, the quality of the finished product, the service life of extrusion production power and the mold itself.
Therefore, the extrusion die planning is very important.
In the nose planning, should pay attention to a few points?
Changshu well below da plastic products factory talk about extrusion die head design under five keys!
1, the nose cavity into a streamlined, can in order to make the material along the nose flow evenly squeeze, to prevent overheating differentiation material for block attacks, must not appear in the nose has decreased sharply, cannot have dead Angle and more blockages, should try to make flow lubrication, surface roughness Ra value in 0. 4μ M
2, satisfactory compression ratio, according to the plastic products and plastic types, planning out satisfactory compression than the nose, can happen to eliminate by the combination of the shunt scaffolds seam, make the finished product is close-grained.
3, the correct profile, because the function of the plastic, pressure, density, shrinkage ratio and other factors, cross section shape of the nose and the mouth of die and the finished product cross section shape is really different, planning to think about the elements, make the nose mouth mold has a reasonable cross section shape.
4, rhythm is compact, easy to tear open outfit, under the condition of satisfactory mechanical functions, to plan out the rhythm at walk into, connecting tightly, heat evenly, tear open outfit is convenient, and no leakage material of the nose.
5, the material selection is reasonable, the nose should choose corrosion resistant, friction resistance, good tensile strength, high hardness of the steel. Some also according to the condition of chrome plated.
1, the nose cavity into a streamlined, can in order to make the material along the nose flow evenly squeeze, to prevent overheating differentiation material for block attacks, must not appear in the nose has decreased sharply, cannot have dead Angle and more blockages, should try to make flow lubrication, surface roughness Ra value in 0. 4μ M
2, satisfactory compression ratio, according to the plastic products and plastic types, planning out satisfactory compression than the nose, can happen to eliminate by the combination of the shunt scaffolds seam, make the finished product is close-grained.
3, the correct profile, because the function of the plastic, pressure, density, shrinkage ratio and other factors, cross section shape of the nose and the mouth of die and the finished product cross section shape is really different, planning to think about the elements, make the nose mouth mold has a reasonable cross section shape.
4, rhythm is compact, easy to tear open outfit, under the condition of satisfactory mechanical functions, to plan out the rhythm at walk into, connecting tightly, heat evenly, tear open outfit is convenient, and no leakage material of the nose.
5, the material selection is reasonable, the nose should choose corrosion resistant, friction resistance, good tensile strength, high hardness of the steel. Some also according to the condition of chrome plated.
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