Copper strip hot rolling

Cut off the copper after 1000 ℃ high temperature heating, hot-rolled, thickness of rolled copper strip at around 2.3cm. I tested with a stopwatch during copper strip rolling into rough copper tape available, 01:47 respectively for the first time, the second time 01:53, the third time 01:59, 01:44 fourth time, fifth time 01:52. Each band is available for 01:51, this step 37 copper per hour on average.