polymer - processs Flashcards
what are teh ways to model polymers
thermoforming
types of themroforming
vaccum
dome blwoing
what is used in thermforming
sheets of HIPS or Acrylic
beenfits of tehrmfoormign mdoelling
more cple 3d forms
what is used to join polymers
solvent celeemnt
what does solvent cement do
softens surface of polymers to be joined
what may be used to join polymers to non polymers
epoxy resin
wasting processes on polymers
drilling
sawing
filling
abrading
equipment to watse polymers
pillar drill
coping saw
band saw
jig saw
scroll saw
files
disc sanded
belt sander
pros of inj moulding
fast
compelx sahpes
high scale production
cons of inj moulding
high inital costs
steps of inj moulding
granels in hopper
heated bareel and scrw run granels
plastic melts
lquid plasti inected in nozzle
water pumpld to coolr
mould open ejector pins
main limtiatiosn of inj moulding
only for high volume
high costs
consdieration in inj moulding
wall thickness
ribs
no sharp corners
draft angles
uses of inj moudling
vaccum cleaners
calclator
skettles
alot
pros of rotational moudling
seamless hollo compeoents
scale for rotatioanl moudling
lare scale batch or amss
uses of roational moudling
cones
kayaks
water tanks
play equpment
what does rotatina moduling allow
compelx parts
with low cost machienry and tooiling
what si compression moudling
polymer thing sit in die,
hydralih press pushes
what scale for compression moulding
lareg scale batch
uses fo compression mpdling
switches
plugs
cups
plates
knobs
adv of cop moulding
low capital costs
no need for runners or sprues
limtiation of comp moulding
very long cycle times
limtied compelxity
and size
what si extrusion
inj moudling bit polymer just forced through die and cut to length
type of scale for production of extrusion
consitous
uses fo extrusion
soldi rods
angle sectiosn
curtain track
when blwo moudling used
wehn producing tin walled compoenents
scale of prodution and cost level for blwo moudling
high intial costs
contuosu production
uses of blwo mpoudling
drink bottles
shampoo bottles
drink tansk
how si slug for blwo mudling made
inj moudling or extension
what is slug for blwo modulign called
pariosn
pros of caccum forming
cheap easy to make moulds
cons of vaccum formign
not cost efefctiev for oen off
need draft angle
roudned coruenrs
scale of vacc form
small batch or mass
uses of vacc formign
trays
box inserts
yoghrut pots
sinks
baths
limitatiosn fo vacc forming
depth of muld
thickness of material
webbing
air holes needed
main material in blwo moulding
HIPS
ABS
what si thermoforming
where mould is pressed onto surface fo polymer same tiem to vaccum applied
pros fo thermo formign
fien details
cons of themroformign
slow long process
cons of themroformign
slow long process
