Sewage covers mold steel mold covers mold factory in Baoding Lunda building materials in the past, covers mold are the first metal produced, the ability to turn parts made of plastic and other materials or finished products, but we can change is now reflected in the mold manufacturing industry More and more daily necessities, not like before, instead of using the resin molding technology developed in accordance with the digital out, this produced a mold with low prices, speed and other advantages, especially three-dimensional mold manufacturing, more metal Mold is not easy to compare the price advantage. Strength and stability covers mold of the base material, interface enhancements material strength and stability, combined with the effect of the process of composite materials, wear open-air section of the covers, anti-aging properties. Early covers mold is reinforced concrete material, because of its brittleness, easy to aging, easy to break and other defects, cast iron, ductile iron gradually being replaced. Covers mold complex shape, high precision, long manufacturing cycle, mold mold processing fees far exceed the cost of materials, which should mold manufacturing high-performance materials. Die biggest advantage is the use of our plant material injection made mold bright and smooth, easy to mold, good toughness, not easily deformed, long life, can reduce costs, get more in return. The series is currently on the market, one of the most widely used products, toughness, easy to mold, long life, quality and characteristics are closely linked with the material of the mold, cover mold material determines the appearance and quality of the road dies In the choice of cable trench cover mold products we have to pay particular attention to these cases, parts production, Dimension stable plastic drain cover mold to adopt high-performance materials, such materials but also for low vacuum mold surface hardening treatment, so the durability of the mold to a new level. Due to the complex shape of the mold, high precision, long production cycle, mold processing cost is high, so the use of high-performance materials are also necessary.