3.5

Question 1

rapid prototyping

Answer 1

production of a physical model of a design using 3d cad files

Question 2

short answer additive or subtractive

Answer 2

additive – complex/low volume production where you build up material layer by layer (3d printing)
subtractive – high precision, strength. better for large scale production of simpler designs. start with a block of material and remove material from it until u get the final shape

Question 3

where would additive production be used

Answer 3

ideal for complex designs. there is also less material waste – crucial for expensive materials. the production is quick which allows for quick changes to be made and tested. generally less expensive if you dont do too many of them. good for producting lightweight parts (so can be used in aerospace where weight matters)

Question 4

where would subtractive production be used

Answer 4

crucial for parts where strength and precision is important (like metal parts). wider range of material to be used including stuff like titanium. cheaper for large scale production. usually provides consistent quality – crucial for cars, aerospace. better for manufacturing where there is no extra complexity

Question 5

why is RP good

Answer 5

it allows mass customisation and therefore more consumer control

Question 6

SLA

Answer 6

liquid bath that hardens under uv light. good detail, very precise

Question 7

LOM

Answer 7

a building up of layers. laser cuts out the needed shape layer by layer. layers are then glued together. good for big parts, simple, quick

Question 8

FDM

Answer 8

plastic or other material is extruded through a heated nozzle which moves in needed direction. like our 3d printer. affordable, most accessible, easy to use

Question 9

SLS

Answer 9

laser sets plastic/other powder into a mass of needed shape. kind of like SLA. its strong and doesn’t need support structures.

Question 10

advantages of RP

Answer 10

less development time
less costs of mistakes
more options of product
effective communication

Question 11

disadvantages of RP

Answer 11

some think its not effective bcs it fails to replicate the actual product well
could happen that some steps are skipped to develop a model quickly
can result in endless recreations
not rlly good for large size products
user may have very high expectation about the performance of prototype