Page 20 - Altogether Magazine Issue 4 English

20 PROCESS Production of FRP requires the following processes: melting and alloying, melt treatment and filtration, casting of ingots, homogenization, and reheating followed by hot rolling, cold rolling and coiling. HOT ROLLING The figure below shows the conventional method of hot rolling, which is also the most robust way of producing Aluminium strip. During hot rolling, the ingot is reduced in thickness from about 600mm to 2-3mm. This is achieved by passing the metal through the rolling mills, forward and backwards several times. The strip, which is the final product from the hot rolling mill, is produced in the form of coils. 01 02 05 06 07 03 04 1. Melting 3. Filtering 5. Scalping Preheating 7. Hot Rolling 2. Holding/Casting 4. DC Casting 6. Rolling Ingots 8. Strip Coiling Another method of producing strip coils in the the strip casting method, as show below. 01 02 05 03 04 1. Melting 3. Filtering 5. Strip Coiling 2. Holding/Casting 4. Strip Casting