Changshu smoothly da plastic products factory talk about head design five key points should be paid attention to

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 extrusion die is very important. Below smooth da plastic products factory in changshu on the extrusion die head design should pay attention to five points:



1, 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 in 0. 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, cross section shape of the right,



due to the performance of the plastic, pressure, density, shrinkage factors, such as the 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, selecting reasonable



the nose should choose corrosion resistant, friction resistance, good tensile strength, high hardness of the steel. Some even chrome plated depending on the situation.