Artistic manhole covers generally come in two forms
The first is a colorful manhole cover,
The second type is a copper-faced manhole cover.
1.
First of all, color manhole covers, color manhole covers are generally painted on the surface of cast iron manhole covers with outdoor wear-resistant resin, fluorocarbon and other materials, this manhole cover is popular from Japan, in the 1880s, a Japanese called Yasutake Kameda thought of the idea of “making the manhole cover surface more visual”, put forward the “manhole cover pattern design”.
He encouraged various cities and towns to develop and design manhole covers with local characteristics, and launched a manhole cover design competition, which set off a boom in manhole cover design in Japan, and this tradition continues for more than 100 years until today.
2.
Let’s talk about the second one, the copper-clad manhole cover.
Can be made of bronze, brass, red copper effect, there are 4 ways, can be made of copper surface manhole cover
1. Casting bronze or red copper requires a large amount of copper, the price will be more expensive, suitable for long-term use;
2. Use cast iron as a load-bearing foundation, and place a layer of 8 mm thick relief copper plate in the surface groove, the two materials are physically combined to form a complete set of finished manhole cover, this method is suitable for small batches, can be used for a long time;
3. Use cast iron to cast patterns and text, and laser cover on the surface, 0.5-1 mm thick bronze, brass, red copper, to reduce production costs. It can be used for 6-8 years without wearing out, and even if worn out, it still looks good and is suitable for long-term use;
4. Use cast iron to cast patterns and characters, and electroplate on the surface, 0.1 mm thick bronze, brass, red copper, to reduce production costs. It can be used for 1 year before wearing out, but it is very cheap and not suitable for