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| Q. |
Which of the following machining process is usually preferred for cutting of ejectors which are used in mould making? |
| A. | milling |
| B. | hobbing |
| C. | wire-cut edm |
| D. | die sink edm |
| Answer» C. wire-cut edm | |
| Explanation: there is a need to cut the ejector to a right dimension and if the cavity surface is shaped there is also a need to shape the ejector end. the wire ed machine is one of the most accurate machines in mould shops and usually there is also free machining time available. another option is to cut and shape the ejectors in a milling machine, but the most accurate milling machines are used in mould cavity machining operations and normally they are rather busy for long periods of time. | |
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