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8 Sep 2001: Economics. The production cycle is slow: usually only 1-5 castings can be made an hour, depending on the size. ... Although the setup costs are low, the low manual production rate means that only batch sizes of up to 50 are economic; this can rise to a

7 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?

8 Sep 2001: Economics. Cycle time is limited by heating and cooling of the sheet.

8 Sep 2001: Economics. Production rates and costs strongly depend on the type of process and the size of component.

20 Jan 2000: Every product is designed in a particular way - product analysis enables us to understand the important materials, processing, economic and aesthetic decisions which are required before any product can be manufactured. ... Choose a suitable process that

8 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.

8 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.

8 Sep 2001: Economics. Production rate is limited by the insertion and removal of the blank, so some form of automation is often used.

8 Sep 2001: Some scrap is always produced and cannot be directly recycled. Economics.

8 Sep 2001: Economics. If possible, avoid cutting! A surprising number of designs involve a cutting process followed by a joining process.

30 Jan 2002: Speed is critical is disassembly is to be economic. In general, the more different materials used in a product, the harder it will be to recycle them.

8 Sep 2001: Economics. Can be economic for any batch size from one-offs to mass production (with or without automation).

8 Sep 2001: Economics. Cycle time is limited by heat conduction out of the mould, so increases dramatically for larger wall thicknesses. ... The long cycle times usually limit economic batch sizes to between 500 and 10,000.

8 Sep 2001: Economics. Basic equipment costs around £10,000, but automation can increase this significantly.

8 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.

8 Sep 2001: cured). Economics. There are few composite forming processes, and the decision of which to use is normally determined first by shape and type of fibre (chopped or continuous), and then by

8 Sep 2001: As a result, a self-quench is usually sufficient. The equipment is very expensive and not economic for large surfaces, but automation is straightforward and very precise control can be achieved.

11 May 2000: It isnot economic to use standard processes such as turning –so another approach is needed.