Page 26 - Sorcha Mathews
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MATERIAL
                                                               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
            TEXTURED ABS                                         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:
        Manufacturing Process                             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.
        1.  A textured mold is made for a part                                         the cooling process.                                                                  sprayed them with paint.
          typicaly from stainless steel or alumini-
          um, then fitted onto an injection mold-                                                                                                                             Reflection
          ing machine.                                                              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
        2.  ABS pellets are then fed into the                                          to use.                                             Coolant
          machine with a 3 zone screw. The zones                   Feeding ABS      .                                                                                        Trial 3                    Reflection
                                                                                                                                                                             I went back to trying to gain a
                                                                                                                                                                                                        This was a happy accident that
          include a feed zone, a transition zone                   into mold                                                                                                 texture with salt. I used wood   resulted in a great texture.
          and a metering zone.                                                                                                                                               glue to stick the salt instead of
                                                                                                                                                                             double sided tape this time.
        3.  Once the pellets have passed through                                                                                                                             After the salt sat on it for a few
                                                                                                                                                                             mins i tried to shake the excess
          these zones they are in a liquid state                                                                                                                             off but it wouldnt come off, so i
          and are injected into the mold.                                                                                                                                    had to brush it off and it took all
                                                                                                                                       Ejection                              the salt off, but left a texture
                                                                                                                                                                             behind on the glue.
        REPLICATION

            Step 1                                                                    Step 3
            Prepare model by sanding and                                              let salt sit for about 2 mins, then
            priming. Repeat process until                                             brush it off delicately with soft
            flawless.                                                                  brush and allow glue to dry
                                                                                      overnight if possible.




                                                                                      Close up of
                                                                                      resulting
                                                                                      effect



                                                Step 2                                                                     Step 4
                                                 Apply a layer of wood glue onto                                           To finish spray model with
                                                 the model, getting it as smooth                                           primer, then with a layer of
                                                 as possible, then cover glue with                                         enamel paint.
                                                 a generous amount of table salt.


     References: http://m.absgoods.com/abs-material/abs-textured-sheet/customized-grey-textured-abs-plastic.html      https://www.avplastics.co.uk/a-short-history-of-injection-moulding
     https://www.moldmakingtechnology.com/articles/the-realities-of-aluminum-tooling     https://www.youtube.com/watch?v=b1U9W4iNDiQ&ab_channel=tronicarts-Multimedia-Agentur
                                                                                                                                                                                                        Sorcha Mathews     C00241949
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