Dt All Flashcards
What is the FSC logo ?
-The forest stewardship council is a non profit making orginisation to protect the sustainability of forests
- A product carrying this logo shows that the timber they are using comes from a forest managed in a sustainable way
What is an alloy ?
Metals forming by mixing together two or more metals to produce a new metal that has improved charicteristics .
What are polymers made from ?
-Polymers are made from crude oil .
- monomers are combined to form long strands
Thermoforming polymers ?
-They can be reheated and therefore shaped in various ways
-re heating them weakens the bonds so much that they become liable to re-shaping
- they are high recyclable , eco-friendly manufacturing .
- cons -if heated may melt , more expensive
High - impact polystyrene properities ?
-glass like texture , good dimensional strength , heat resistant
-uses: yogart containers , plastic cutlery
High - density polystyrene ?
Flexible, translucent , low cost , good low temperature toughness
- insulate walls
Polyethylene terephthate ?
-High strength, very low moisture desorbation , good chemical resistance
- textiles , packaging, litre bottles
Acrylic ?
-very high mechanical strength and hardness , easy to polish , low water absorption, transparent
-glass lenses , acrylic nails , bath-tub,
Polypropylene ?
-Semi-riged , good chemical resistance , tough , translucent , good heat resistance
- textiles , hot bevarage cups .
What are Thermosetting polymers ?
Once ‘set’ these plastics cannot be reheated to soften,shape or mould . They have a tridimensional lattice structure making the bonds between them very strong .
Pros -high heat resistance , excellent appearence , cost effective
Cons - cannot be recycled , difficult to apply surface finnish
What is QA?
QA - quality assurance
- it doesnt check the quality of the final product , but the quality of all system of the production line . Thinks more about customer then then the standards
What is QC ?
- quality control
-The process of inspecting productsto ensure that they meet the required quality standards. - it undergoes physical tests (e.g dropped from a height etc )
What is the kilemark trademark ?
- this is linked to production and it assures the service quality and that safety is paramount .
What is the lion mark ?
This is a brittish consumer symbol developed in 1988 and is used to identify toys as safe and of a high quality
What are smart materials ?
Smart materials are designed materials that are changed by an external stimuli such as temperature moisture electric or magnetic feilds or uv light
What are some Timber manufacturing processes ?
Routering : shape , cut or create designs in wood . Different tools for differnet things
Turning : peices of timber are rotated and cutting tools are used to shape it
Laminating : thin strips of wood glued together in a former .
Steam bending : peices of timber can be bent by straming them as it temporarily softens them
Kerfing : adding thin saw cuts into wood you can make it flexible and make curved shapes
What are the plastic manufacturing processes ?
Line bending : typically acrylic used , heated to 160oc polymer become pliable jigs are used to keep in place .
Injection moulding : plastic granules into hopper , heated jackets around screw melt polymer then the hydralic ram forces the plastic into the mould . Then the plastic is allowed to cool .
Extrusion : feeds grandules into a heater , they melt and forced through a die making shapes, dried
Vacuum forming : mould placed into former , heated former raised air suction , cool then removed.
Blow moulding : mould opened , hollow tube - parison is heated and put it , mould is shut and air is forced into mould at high pressure forced to mould into sides then cooled
What are the scales of production ?
-One off production - expensive , long time to make , made from skilled craftsmakers
- batch production - all are identical , made in small batches , cost 2-10k
-mass production - produces in high volumes 10k+, high demand , cost ranges
- continuous production - cheap , factories found in developing countries
- Just in time - product made to a time schedule , everything exact times , production , shipping . Apple use this .
What are the wastage metal manufacturing proccesses ?
- turning - same as timber but with metal
- sawing - you can use a junior hacksaw for polymers , metals and timbers for small jobs but a hacksaw can be removed from the frame and replaced when the teeth become blunt
- milling - milling is similar to routering but due to metals being cut they have more durable cutting tools .
-drilling - instead of a pillar drill or a slot drill (milling) high speed steel twist drill does this with a bit more accuracy and speed . - cutting and sheering - cutting and slicing action . Cutting - some saws cut thicker planks
What is the term wastage ?
Cutting away material with tools and equipment .
What are the addition proccesses of metal ?
Welding - usually metals , melting work peices and adding a filler material to form a pool of malten material when dried strengthens the material .
Brazing - metal joining process where a filler metal is heated and applied between two or more fitting parts close .
Soldering - where 2 or more metal parts are put together by melting and flowing soilder into a joint . The soilder must have a lower boiling point then adjoining metal .
What is deforming and reforming ? ( bending and casting)
Bending and casting
- bending - simplest form of forming a metal , bending it with a vice or just hollowing it using jigs
Casting - pewter casting - low tech add pewter into a mould let it dry remove it .
Sand casting - oldest form of casting still used today
What is UCD ?
Placing people at the heart of a design and its where designers focus on users needs in each phase of the design process .
What is ergonomics ?
- The study of how well and comfortably people can interact with products and systems
- it should improve peoples life when using it increasing comfort and satisfaction and interaction .