Page 26 - Sorcha Mathews

MATERIAL
TEXTURED ABS
Manufacturing Process
1. A textured mold is made for a part
typicaly from stainless steel or alumini-
um, then fitted onto an injection mold-
ing machine.
2. ABS pellets are then fed into the
machine with a 3 zone screw. The zones
include a feed zone, a transition zone
and a metering zone.
3. Once the pellets have passed through
these zones they are in a liquid state
and are injected into the mold.
REPLICATION
Step 1
Prepare model by sanding and
priming. Repeat process until
flawless.
Step 2
Apply a layer of wood glue onto
the model, getting it as smooth
as possible, then cover glue with
a generous amount of table salt.
References: http://m.absgoods.com/abs-material/abs-textured-sheet/customized-grey-textured-abs-plastic.html
https://www.moldmakingtechnology.com/articles/the-realities-of-aluminum-tooling
INFORMATION Faux Replication Reflection/ Trial + Error
Prevalence Historical Use Contextual Use Trial 1 satisfied with resulting texture,
I tried to make a textured effect it wasnt even enough.
ABS is one of the most Injection molding polymers Through injection molding by putting double sided tape on
common polymers used in has been around since the polymers you can create a some acrylic, then covering it Learning:
injection moulding due to late 1800’s, rapidly creating variety of surface finishes with salt and shaking off excess. Salt isnt uniform enough to get
its flexibility, light weight traction over the next 100 from adding in textures I then covered salt in a few desired finish.
and impact and heat resis- years, overtaking steel into moulds. In this context layers of primer. Once this was
dry I sanded back the salt
tance. It is also a reycleable production in 1979. The a bumpy finish is moulded slightly then applied another
thermoplastic which makes introduction of aluminium onto parts, this is common layer of primer, then paint.
it a favorable polymer over molds increased production for parts that will get wear
thermosetting plastics due due to them being easier to and tear because the wear Reflection
This worked, however i wasnt
to the push for more cut and the fact that they will be less noticable that it
environmentally friendly cool quicker than steel. would be on a gloss finish. Trial 2 sprinkles and kind of melted
This time instead of using salt
into the glue. the paint also
products to be made.
This is seen on chairs etc.
and double sided tape i used cracked.
PRODUCTION sprinkles and pva glue. The
sprinkles had big gaps in Learning:
Feeding ABS 4. between then so i covered them I abandoned the attempt of
pellets Coolant is circulated through the with more glue to fill the gaps. using sprinkles, they dont work
mold tool in order to speed up After i thought it was dry i well with glues and paints.
the cooling process. sprayed them with paint.
Reflection
5. Once cool the mold is open and This was a disaster, the glue
the ABS part is ejected and ready mixed with the sugar in the
to use. Coolant
Feeding ABS . Trial 3 Reflection
I went back to trying to gain a
This was a happy accident that
into mold texture with salt. I used wood resulted in a great texture.
glue to stick the salt instead of
double sided tape this time.
After the salt sat on it for a few
mins i tried to shake the excess
off but it wouldnt come off, so i
had to brush it off and it took all
Ejection the salt off, but left a texture
behind on the glue.
Step 3
let salt sit for about 2 mins, then
brush it off delicately with soft
brush and allow glue to dry
overnight if possible.
Close up of
resulting
effect
Step 4
To finish spray model with
primer, then with a layer of
enamel paint.
https://www.avplastics.co.uk/a-short-history-of-injection-moulding
https://www.youtube.com/watch?v=b1U9W4iNDiQ&ab_channel=tronicarts-Multimedia-Agentur
Sorcha Mathews C00241949