[sdiy] Plastic case fabrication

[David Halliday]

DIYers in Wisconsin areaI looked into this once.  The problem is that these
are made by injecting plastic into a metal mold under fairly high pressure
and temperature ( couple hundred degrees and PSI )

The mold has to be strong enough to resist this.  It also has to be made so
that it can fit into the molding machine.  To get this, you need to spend
several thousand dollars on up depending on the complexity of your design.
Classic case of the first one costing $10,000 and each successive one
costing $0.30 each.

You might want to search the web for various plastic companies - see if
there might be an off-the-shelf extrusion or blow molded piece that can be
used.  Or change what you are designing to fit something off the shelf.


  -----Original Message-----
  From: owner-synth-diy at node12b53.a2000.nl
[mailto:owner-synth-diy at node12b53.a2000.nl]On Behalf Of Jon Darby
  Sent: Monday, March 26, 2001 10:25 AM
  To: synth-diy at node12b53.a2000.nl
  Subject: [sdiy] Plastic case fabrication


  Good afternoon, everyone (please adjust greeting to your time zone),
     How would one go about commisioning someone to fabricate a number of
plastic bowl-shaped cases, or really any shape someone would want? For
example, the case a cell phone sits in, someone designed that and another
guy is making them as we speak. Who are these people and how do I contact
them for a simple, simple half-sphere much simpler than even the simplest of
cell phone cases, and the only thing I would ask would be flanges to drill
screws into. I'm trying to avoid cutting hundreds of little plastic balls
you find at the Chuck E. Cheese Ball Crawl in half and epoxying the guts
into the bottom. Is this type of work tremendously expensive to have done?
  Thank you for the advice,
  Jon Darby


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