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Changshu smoothly da plastic products factory talk about plastic extrusion die design should follow five principles
by：CSSSLD
2021-01-23
Plastic extrusion die is the core part of the extrusion production, extrusion mould technology state is directly related to the stability of the extrusion production, the quality of extrusion products, extrusion production efficiency and the service life of mold itself.
Therefore, the design of plastic injection mould is very important.
Changshu well below da plastic products factory talk about the plastic injection mould design should follow five principles!
1. Inside the nose cavity to a streamlined
in order to make the material along the nose can flow out evenly, avoid materials due to the stagnation of overheating decomposition, must not appear in the nose has narrowed sharply, more can't have a corner and stagnation zone, should try to make the flow smooth, suggested that the surface roughness Ra value at zero. 4μ m
2. Enough compression ratio
according to the different varieties of plastic products and plastic, designed to produce enough head compression ratio, to eliminate due to shunt stent combined with seam, make compact products.
3. The correct profile is
due to the performance of the plastic, pressure, density, shrinkage, cross section shape of the nose and the mouth of die and products section shape is little different from real, this factor should consider when designing, make the nose mouth mold has a reasonable cross section shape.
4. Rhythm is compact, easy to tear open outfit
under the condition of satisfy the mechanical properties, to create a rhythm to walk, tight joints, heat evenly, easy tear open outfit, and no leakage of the nose.
5. Reasonable material selection
the nose should choose corrosion resistance, friction resistance, good tensile strength, high hardness of the steel. Some even chrome plated depending on the situation.
1. Inside the nose cavity to a streamlined
in order to make the material along the nose can flow out evenly, avoid materials due to the stagnation of overheating decomposition, must not appear in the nose has narrowed sharply, more can't have a corner and stagnation zone, should try to make the flow smooth, suggested that the surface roughness Ra value at zero. 4μ m
2. Enough compression ratio
according to the different varieties of plastic products and plastic, designed to produce enough head compression ratio, to eliminate due to shunt stent combined with seam, make compact products.
3. The correct profile is
due to the performance of the plastic, pressure, density, shrinkage, cross section shape of the nose and the mouth of die and products section shape is little different from real, this factor should consider when designing, make the nose mouth mold has a reasonable cross section shape.
4. Rhythm is compact, easy to tear open outfit
under the condition of satisfy the mechanical properties, to create a rhythm to walk, tight joints, heat evenly, easy tear open outfit, and no leakage of the nose.
5. Reasonable material selection
the nose should choose corrosion resistance, friction resistance, good tensile strength, high hardness of the steel. Some even chrome plated depending on the situation.
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