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Energy - Cost
www-materials.eng.cam.ac.uk/mpsite/interactive_charts/energy-cost/basic.html7 Sep 2001: Simple Questions. Why is it economic to recycle aluminium cans but less so for steel ones? ... Why will new reserves of minerals/oil which are not now economic to mine become economic in the future? -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/compression_moulding.html8 Sep 2001: Economics. Cycle time is limited by heat transfer, or curing time and is usually over 1 minute. ... The low production rate means that it is only usually economic for batch sizes in the tens of thousands. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/joining.html8 Sep 2001: In addition to these processes, there are a variety of "hot processes" such as welding and brazing which can often provide stronger and more economic joints for metal parts. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/injection_moulding.html8 Sep 2001: Economics. To reduce costs, several parts are often moulded together on a "tree-like" structure; parts can then be separated after moulding. ... Injection moulding is only economic for batches of 10,000 - 100,000 or more and so is usually automated. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/mechanical_fastening.html8 Sep 2001: Economics. Can be economic for any batch size from one-offs to mass production (with or without automation). -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/drilling.html8 Sep 2001: Economics. It is normal to try to reduce the amount of drilling required in a component by careful design - but when an accurate hole is required, drilling has little competition. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/grinding.html8 Sep 2001: Economics. On an industrial scale, the wear on grinding equipment is significant and this adds greatly to the cost. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/blow_moulding.html8 Sep 2001: Economics. The production speed is limited by opening and closing the mould, so automation is normally used. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/turning.html8 Sep 2001: Economics. The use of dedicated lathes for metal turning is rare on an industrial scale, except for prototyping. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/powder_metal_forming.html8 Sep 2001: filter, bearings). Economics. The machinery is expensive, and can cost well over £100,000. ... Tends only to be economic for large batches (50,000+) or processing high-strength alloys.
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