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Product design > Paper 1 June > Flashcards

Paper 1 June Flashcards

1
Q

Rapid prototyping

A

Rapid prototyping is a CAM method which produces physical prototypes from CAD files

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2
Q

Sintering

A

uses a laser to fuse layers in a bath of powder

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3
Q

stereolithography

A

uses a laser to cure a bath of resin solidifying it layer by layer

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4
Q

Fused deposition modeling

A

extrude filament through a nozzle which get built up layer by layer

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5
Q

why use 3d printers

A

faster, cheaper, less waste

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6
Q

what are smart materials

A

a material that is altered by an external stimulus

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7
Q

shape memory alloy

A

alloys that are programmed to remember specific shapes at given temperatures, nitinol is a common alloy, they are expensive

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8
Q

Programming SMAs

A

nitinol is held in a jig then heated in a furnace above the transformation temperature then wait to cool, the activation temp is needed to stimulate reforming

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9
Q

SMAs use

A

braces, glasses frames

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10
Q

SMAs use

A

braces, glasses frames

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11
Q

thermochromic pigment

A

changes colour or opacity with heat, mixed into materials and finishes as well as polymer’s - thermometers, coffee mugs

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12
Q

phosphorescent pigment

A

absorb light from light sources and emit light in dark, fades within a few hours - paints, toys, stickers

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13
Q

photochromic pigment

A

changes colour or opacity with levels of ultraviolet light - spectacles, clothing

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14
Q

electroluminescent wire

A

made up from copper coated in phosphor which glows either a alternating current in applied, suitable outdoors with its plastic coating -lighting, bicycles, costumes

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15
Q

piezoelectric materials

A

these convert mechanical energy into electrical energy, using pressure or vibration to convert electrical charge -lighters spark, trip burglar alarmsp

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16
Q

Modeling

A

traditionally products are modeled and tested physically, by hand is a highly skilled labour intensive process

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17
Q

CAD models

A

offer more versatile alternative, you are able to define the properties of materials and match the real life full size product

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18
Q

die casting

A

used with lower melting point metals, tool steel is used for moulds, suitable for mass production with quality finish - alloy wheels, metal toys, engine parts

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19
Q

die casting process

A

molten metal is fed into the die where it’s left to cool either through pressure or gravity, ejector pins low the die to release from the casting

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20
Q

sand casting

A

used for high melting point metals, moulds made from green sand, job or batch production due to single use moulds - train wheels, post boxes

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21
Q

sand casting

A

used for high melting point metals, moulds made from green sand, job or batch production due to single use moulds - train wheels, post boxes

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22
Q

sand cast process

A

a pattern is used to make a mound in the sand,

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23
Q

investment casting

A

used cast items with awkward shapes, wide range of metals suitable, high quality with great finish, repeatable as wax patterns are cast from a master mobile

24
Q

pewter casting

A

pewter has a low melting point, ideal for jewelry or decorative components, one off production

25
Q

toughness

A

ability to absorb energy and deform plastically without cracking instead dissipating energy - cycle helmets

26
Q

elasticity

A

resistance to distort and return to its original shape - balloons

27
Q

flexibility

A

the ability to be bent or fold without breaking whilst stiffness is how rigid a material is

28
Q

mouldability

A

ability to be shaped into a form or mould

29
Q

hardness

A

ability to be scored and cut and folded

30
Q

thermal insulation

A

how well it transfers heat between objects and people

31
Q

electric insulation

A

a material that doesn’t allow electricity to flow through it

32
Q

melting points

A

the temp when a material changes state from a solid to a liquid

33
Q

uv resistance

A

how much it is effected by uv radiation

34
Q

resistance to chemicals

A

how well they resist chemicals

35
Q

resistance to liquids

A

most are resistant to liquid however the length of time they can be varies

36
Q

food packaging

A

films and sheets create a barrier from surroundings

37
Q

food packaging

A

heat resistant sealed to make sure it’s fresh

38
Q

transparency

A

how permeable a material is to light radiation, translucent are partially and opaque is impermeable

39
Q

self finishing

A

no additional surface finishing is required

40
Q

additives can be added for

A

processing, performance, functionality, biodegradability- plasticisers

41
Q

recyclability

A

process of recovering waste polymers and reprocessing them into useful materials

42
Q

Thermoplastic characteristic

A

low melting point, resistance to chemicals, mouldable, flexible, durable, recyclable

43
Q

thermosets

A

robust, resistant to heat, chemicals and mechanical strength. not recyclable

44
Q

LDPE low density polyethylene

A

flexible, tough, resistance to chemicals, translucent or opaque - carrier bags, toys, snap on lids

45
Q

high density polyethylene

A

tough, better strength to weight ratio - bottles and drums containing chemicals, buckets, toys

46
Q

HDPE high density polyethylene

A

tough, better strength to weight ratio- storage boxes, bottles, bins

47
Q

PP polypropylene

A

tough, flexible, fatigue/chemical resistance - food packaging, hinged lids

48
Q

HIPS High impact polystyrene

A

high impact strength, rigid, food safe, retains heat without deformation - yogurt pots, salad bowls, cutlery

49
Q

ABS acrylonitrile butadiene styrene

A

hard, tough, good resistance to chemicals and grease, easily mounded - computer housing screen, safety helmets

50
Q

Tolerance

A

high volume production aims for absolute accuracy and efficiency with small margins for errors applied to weight, height, thickness etc

51
Q

FEA finite element analysis

A

stimulates specific loads and stresses on parts and components, measure how well products work in real life, weakness’s can be identified and resolved

52
Q

benefits buying pre manufactured components

A

cost savings, efficiency, higher quality

53
Q

pre manufactured components

A

when you buy in a components of your product from another factory

54
Q

pre manufactured components

A

when you buy in a components of your product from another factory

55
Q

EPOS

A

electronic point of sale, creates sales data, monitors sales

56
Q

EDI

A

Electronic data interchange, exchanges of data

57
Q

Customer profiling

A

buying habits, targeted advertising on social media and emails

Product design (5 decks)

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