Set the pupils a DMA in which they produce a design that can be outputted using CNC machines. The assignment should encourage the pupils to use ICT to plan their making, to adapt or process their design ideas for different machines and materials, and to seek information in order to help them make decisions about the making process. They should use CAM to realise their ideas. This assignment could be used to encourage pupils to work as a team.
Examples
These example DMAs have been written so they can be copied and given directly to pupils. Further details and contexts can be added, as appropriate.
Computer pewter
Layers of design can be built up in a CAD package. From this, a mould can be generated on a 3 axis or 2.5 axis milling machine or engraving machine. Molten pewter can then be poured into the mould, giving a good cast when the hot metal has solidified. Design and make a mould and then cast a shape that can be stuck to the front of a magazine,
eg a hobbies or fashion publication, and given away free to readers. You will need to identify the needs, interests and wants of the users; investigate the content of the magazine and think of appropriate themes; develop ideas to increase consumer interest and promote sales of the publication; produce proposals for a shape that could be stuck to the magazine without major disruption to circulation or display; select a proposal for development using CAD/CAM.
Moulds and production aids for food production
CAM-produced formers can be used to produce simple, accurate and good quality vacuum-formed plastic containers using food-grade plastic. These moulds can then be used to make batches of food products of a particular size and shape,
eg for soft cheese dips, lollies, jellies, biscuits.
CAM-produced templates can also be used to make products of a consistent size and shape,
eg for a ravioli board or biscuit cutter.
CAM can also be used to produce dies for extruding shaped foods and to make production aids,
eg cutting devices to ensure consistent batch production. Produce a CAM former, template or die, or production aid for a new food product that you design. |
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- formulate a design specification, bearing in mind the social and cultural context and having talked to potential users
- recognise critical factors that should be used as design criteria, including those related to social and environmental issues
- draw on a wide range of information sources
- work effectively within a team, discussing and responding to information, working on designing and making aspects, and reviewing product outcomes
- develop systems to ensure quality when batch production is important
- recognise that wasteful production and disposal are harmful to the environment
- decide on the main stages of making and the order in which they must be carried out for the task to be successfully completed on time
- use tools, equipment and techniques to construct with precision
- justify their decisions about materials and methods
- discuss with users the extent to which the product meets the design criteria, noting the main points made and using them to plan possible improvements
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