Briefly introduce the high temperature molding process of composite manhole cover

Apr 25,2023

Composite manhole covers are one of the popular manhole cover products in recent years. Unlike traditional cast iron gray manhole covers, they use a high temperature forming process. Of course, this is inseparable from the composite materials it uses. So what are the advantages of composite manhole covers? What is the high temperature forming process?
First of all, the composite manhole cover is a new type of environmentally friendly cover. The composite manhole cover adopts high temperature molding one-time molding technology, adopts fiber-reinforced thermosetting composite material, and is made of unsaturated polyester resin as the matrix, and is made of compression molding technology. What are the advantages of the composite manhole cover? The manhole cover produced in this way has high polymerization, high density, good impact resistance and tensile strength, and has the advantages of wear resistance, corrosion resistance, no rust, and no pollution.
Why is the high temperature molding process much more advanced than the casting process? The main reason is that the internal high temperature molding process requires only a small amount of electric energy during operation, demonstrating its excellent environmental protection and energy saving performance. The casting process not only has a significant impact on the environment, but also consumes a lot of energy. The actual operation has also proved that the high temperature molding process is more convenient and simpler. As long as the temperature is set, the raw material can be injected when the preset temperature is reached. But the casting process is not as simple as it is said, because both the temperature of the molten iron and the structure of the composite material need to be controlled manually. Therefore, the requirements for the operator are high.
Manhole covers are mostly round, and composite manhole covers are no exception. The circular design also helps prevent irregular objects from falling, greatly improving safety. It can also be seen from the manhole cover products that are produced by high temperature molding technology are more beautiful, three-dimensional and delicate, while the manhole covers made by traditional casting technology look relatively rough.
From the perspective of manufacturing technology alone, the advantages of composite manhole covers can be clearly reflected, and their advantages go far beyond that. Composite manhole covers can also determine the corresponding bearing grades and specifications according to actual needs.