In recent years, the research and development of composite manhole covers has been booming in China, and not only has production skills been improved, but production scale has also been significantly improved. This thin-walled skill development exhibition for composite manhole covers has accelerated castings to replace sheet metal parts. The core is effectively used in the die-casting of the compound well cover, thereby achieving the intention of weight reduction due to the hollowness. For example, the impellers of superchargers were produced by the gravity composite manhole cover method in the past, and the hollow impellers were developed by the die casting method using a rotatable metal core method. The die-casting method is used to replace the gravity composite manhole cover to obtain a near-net product, which improves the efficiency.
With the development and use of composite manhole cover industry, manhole cover skills are constantly emerging. At present, compound manhole cover is facing challenges in lightweighting. Ultra-fine and ultra-thin walling have become the main features of new composite manhole cover technology. Sand cover compound manhole cover skills It is not allowed under the sand grit (0.1mm). Historically, small castings are toothed braces. The development of composite manhole covers in this regard will cause new demands. The thinning of composite manhole covers has been developed centering on die-casting, and a high-pressure die-casting method has been used. Audio box shells with an average diameter of less than 1.0mm are manufactured by the high-speed composite manhole cover method of a 1200-ton die-casting machine.
At present, the compound manhole cover has become a new type of construction engineering product that has been paid much attention to. The current status of China's composite manhole cover skills is mainly reflected in the following aspects:
1. First of all, new varieties of composite manhole covers are constantly emerging, and there are continuous innovations in material selection and structure.
2. The number of enterprises producing new composite manhole covers is increasing, and it is estimated that the number of domestic enterprises of various types has exceeded 100.
3. The number of patent skills for compound manhole covers in our country is increasing year by year, and their novelty and originality have improved.
All signs show that China's composite manhole cover has an outstanding development momentum, and the composite manhole cover will play a huge role in the future construction and municipal administration.
Guangzhou Wanxin Building Materials mainly distributes and wholesales various ductile manhole covers, composite resin manhole covers, cement steel fibers, hot-dip galvanized steel grids, glass fiber reinforced plastic manhole covers, cement components, ductile pipes and cement pipes, planting bricks, depressions, tree guards and bearing Sample customization of various cast iron parts sold in the consumer market