How many parts are there in the extrusion die?
Mould is an important tool for extrusion technology. It is usually composed of two parts: preforming mould and forming mould.
1) preforming die in pultrusion process, reinforced material impregnated resin (or soak 淸) at the same time, after before entering the forming die, must pass a composed of a set of pilot sand component preform mould, is the role of preforming die after rubber reinforced material, in accordance with section configuration forms, gradually formed the approximate forming cavity shape and size of preforming, then into the forming die, so that products uniform cross-section sand content.
(2) molding molding mold cross sectional area and the product ratio of the cross sectional area generally should be greater than or equal to 10, to ensure that the mold has enough strength and stiffness, after heating uniformity and stability of heat distribution.The length of the extrusion die is determined by the traction speed and the curing speed of the resin gel during the molding process, so as to ensure that the product reaches the curing degree when it is pulled out.Steel chrome plating is generally adopted, and the surface of the die cavity requires smooth and wear-resistant, so as to reduce the friction resistance and improve the service life of the die.