polymer - processs

Question 1

what are teh ways to model polymers

Answer 1

thermoforming

Question 2

types of themroforming

Answer 2

vaccum
dome blwoing

Question 3

what is used in thermforming

Answer 3

sheets of HIPS or Acrylic

Question 4

beenfits of tehrmfoormign mdoelling

Answer 4

more cple 3d forms

Question 5

what is used to join polymers

Answer 5

solvent celeemnt

Question 6

what does solvent cement do

Answer 6

softens surface of polymers to be joined

Question 7

what may be used to join polymers to non polymers

Answer 7

epoxy resin

Question 8

wasting processes on polymers

Answer 8

drilling
sawing
filling
abrading

Question 9

equipment to watse polymers

Answer 9

pillar drill
coping saw
band saw
jig saw
scroll saw
files
disc sanded
belt sander

Question 10

pros of inj moulding

Answer 10

fast
compelx sahpes
high scale production

Question 11

cons of inj moulding

Answer 11

high inital costs

Question 12

steps of inj moulding

Answer 12

granels in hopper
heated bareel and scrw run granels
plastic melts
lquid plasti inected in nozzle
water pumpld to coolr
mould open ejector pins

Question 13

main limtiatiosn of inj moulding

Answer 13

only for high volume
high costs

Question 14

consdieration in inj moulding

Answer 14

wall thickness
ribs
no sharp corners
draft angles

Question 15

uses of inj moudling

Answer 15

vaccum cleaners
calclator
skettles
alot

Question 16

pros of rotational moudling

Answer 16

seamless hollo compeoents

Question 17

scale for rotatioanl moudling

Answer 17

lare scale batch or amss

Question 18

uses of roational moudling

Answer 18

cones
kayaks
water tanks
play equpment

Question 19

what does rotatina moduling allow

Answer 19

compelx parts
with low cost machienry and tooiling

Question 20

what si compression moudling

Answer 20

polymer thing sit in die,
hydralih press pushes

Question 21

what scale for compression moulding

Answer 21

lareg scale batch

Question 22

uses fo compression mpdling

Answer 22

switches
plugs
cups
plates
knobs

Question 23

adv of cop moulding

Answer 23

low capital costs
no need for runners or sprues

Question 24

limtiation of comp moulding

Answer 24

very long cycle times
limtied compelxity
and size

Question 25

what si extrusion

Answer 25

inj moudling bit polymer just forced through die and cut to length

Question 26

type of scale for production of extrusion

Answer 26

consitous

Question 27

uses fo extrusion

Answer 27

soldi rods
angle sectiosn
curtain track

Question 28

when blwo moudling used

Answer 28

wehn producing tin walled compoenents

Question 29

scale of prodution and cost level for blwo moudling

Answer 29

high intial costs
contuosu production

Question 30

uses of blwo mpoudling

Answer 30

drink bottles
shampoo bottles
drink tansk

Question 31

how si slug for blwo mudling made

Answer 31

inj moudling or extension

Question 32

what is slug for blwo modulign called

Answer 32

pariosn

Question 33

pros of caccum forming

Answer 33

cheap easy to make moulds

Question 34

cons of vaccum formign

Answer 34

not cost efefctiev for oen off
need draft angle
roudned coruenrs

Question 35

scale of vacc form

Answer 35

small batch or mass

Question 36

uses of vacc formign

Answer 36

trays
box inserts
yoghrut pots
sinks
baths

Question 37

limitatiosn fo vacc forming

Answer 37

depth of muld
thickness of material
webbing
air holes needed

Question 38

main material in blwo moulding

Answer 38

HIPS
ABS

Question 39

what si thermoforming

Answer 39

where mould is pressed onto surface fo polymer same tiem to vaccum applied

Question 40

pros fo thermo formign

Answer 40

fien details

Question 41

cons of themroformign

Answer 41

slow long process

Question 42

cons of themroformign

Answer 42

slow long process