Manhole covers are made out of cast iron. Cast iron means that the iron is melted and then poured, or cast, into a mold. Typical manhole covers are cast using gray cast iron, ductile cast iron.
Besides iron, the other raw material required to make manhole covers is green sand, which is sand bound together with clay. The green sand is used to produce the molds into which the molten iron is poured. The sand mixture consists of about 90% silica sand, 4-10% clay, 2-10% organics (e.g., coal), and 2-5% water. The sand is not colored green. Green refers to the fact that it is allowed to remain wet during the casting process.
Size of Molding Plate
700*700*(180-250) or (OEM)
60-80 moulds per hour
Hardness of Sand Mould
Way of Molding
Pneumatic sand shooting and hydraulic compaction
Compaction pressure (maximum)
Compressed air pressure
Air consumption of Sand Shooting
3.0 Nm3 per minute
Programmable controller, touch screen
Power of Motor
1. Shot blasting equipment, jolt squeeze sand molding machine,multi-piston high pressure sand casting machine, core shooting machine, dust collector, sand conditioning line, Vacuum Process Casting line, Lost Foam Casting Line, Horizontal and Vertical Flaskless Automatic Production Line.
2. Engineeres are available to guide the installation and take care of other problems.
3. 12 months products warranty.
Why choose us?
1.Highest quality of our products following CE, ISO 9001 and Strict Production Guideline standard.
2.Factory and Competitive Price we offer.
3.Our level of after-sale service is second to none.
4.Our equipment is designed and constructed with our customer's safety as a top priority.