[sdiy] Injection molding and stuff

[john mahoney]

You don't need a metal mold to make things from cast resin, a.k.a. liquid
plastic. I believe that you can use Plaster of Paris, clay, Sculpy/Fimo,
whatever...  Make a box that's just what you want, externally, then make a
mold from it. Must be all kinds of "how to" info on the web, for this.

That resin might be too brittle, though. Are you sure that you can't find
such boxes already made?

You could also use sheet acrylic (Plexiglas, Lucite) which you simply heat
in the oven until it's warm and flexible. Well, first you have to cut it to
shape. Then you have to sand and sand and wet sand and then buff the edges.
Okay, it's a big hassle!

I'm out of ideas.
--
john


----- Original Message ----- 
From: "Bert Schiettecatte" <bschiett at etro.vub.ac.be>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Thursday, August 12, 2004 5:00 PM
Subject: [sdiy] Injection molding and stuff


> Hi All,
>
> I know this is not strictly synth DIY but it is DIY! :-) I'm trying to
> figure out an easy way to make 5cm x 5cm x 2cm hollow boxes made of
> clear plastic .. I need about 20 of those so I'm not really keen on
> buying acrylic sheets, cutting them and glueing.. So I thought about
> creating a metal mold somehow and then pouring plastic into the mold.
> Any ideas on this? I'm not very good at shop skills and stuff but
> willing to learn.
>
> Thanks!
> bert
>