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222X 132 |
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205 X 115 | ||
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188 X 95 | ||
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33 -43 | ||
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650 | ||
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1200 | ||
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46×41×45 | ||
| 0.06 | 13.5 | ||
| 0.085 | |||
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| 1 | rec18114i | 175x110 | 158x100 | 142x76 | 30(40) | 380 | |||
| 2 | rec22133i | 222x132 | 205x115 | 188x95 | 33(43) | 650ml | |||
| 3 | rec27134i | 274x130 | 258x114 | 238x86 | 35(42.5) | 900 | |||
| 4 | REC35135I | 350x134 | 335x120 | 315x95 | 42(50) | 1500ML |
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| 1 | rec18114i | 6.9x4.3 | 6.2x3.9 | 5.6x3 | 1.2(1.6) | 13 | |||
| 2 | rec22133i | 8.7x5.2 | 8.1x4.5 | 7.4x3.7 | 1.3(1.7) | 22 | |||
| 3 | rec27134i | 10.8x5.1 | 10.2x4.5 | 9.4x3.4 | 1.4(1.7) | 30 | |||
| 4 | REC35135I | 13.8x5.3 | 13.2x4.7 | 12.4x3.7 | 1.7(2) | 50 |
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Tips: Aluminum rolling is not like rolling softer materials such as plastic or paper where a single pair of metal rolls can assure gauge control. In order to correct this problem, foil mills employ a number of means to control the rolling process (Figure 8). The rolls next to the metal are called "work rolls". The rolling mill employs a series of back-up rolls to help ensure appropriate rolling pressure across the web via enhanced rigidity and reduction of roll deflection. This allows higher or variable loads to be absorbed while maintaining a given roll gap profile. A mill with two back-up rolls is a "four high mill"; one with four back-up rolls is a "six high mill". Rolls are also shaped (thicker at the middle than at the edges), and back-up rolls may be slightly bent or placed with axes slightly different to help achieve the desired rolling pressures. Rolling fluids, which are employed for cooling, are also used to control the rolling process. Slightly reducing oil spray on a part of a mill roll will cause it to heat slightly at that spot and increase pressure on the metal. Conversely, increasing oil spray can be used to create spot cooling with a resulting lowered pressure at that point. Gauge control is achieved by continuous computer monitoring of gauge at each mill. |
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