looking for shallow plastic domes and disc

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OdysseySlipways
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looking for shallow plastic domes and disc

Post by OdysseySlipways » Fri Sep 26, 2014 6:36 pm

i am looking for some shallow plastic domes so i can build some larger scales of my modular star hauler

the domes i am looking for need to be pretty close to these sizes:

for my 4222 scale build
dome - 95mm wide and aprox 15-20mm tall
disc - 85mm wide and aprox 1/8 or 2.5mm thick (i can build them up in layers if need be)

for my 2256 scale build
dome - 177mm wide and aprox 40?mm tall
disc - 150mm wide and aprox 1/8 or 2.5mm thick (i can build them up in layers if need be)

i am thinking that i may just cut the disc from .080" (or thicker) myself and build them up as need be, but the domes i can't make.

i'd like to try to have the domes as plastic and hollow-like as it would be interesting to see someone try to light one of these kits
Chris,
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Johnnycrash
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Post by Johnnycrash » Fri Sep 26, 2014 7:05 pm

Plastruct - Page 28 (PDF page 30).
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Face of an alarm clock?

Post by Lunamation » Thu Apr 02, 2015 7:21 am

Have you tried the face of an alarm clock?
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EVApodman
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Post by EVApodman » Fri Oct 07, 2016 11:05 am

When I needed to make some shallow domes for an antenna I first made a small dome using styrene, a plastic rod and Bondo that I spun on a drill to create the rounded shape. This was my positive mold.

Then using Vaselene I put more Bondo on top of my dome piece to create a block. After the bond set I pulled them apart.

Then I put a small piece of thin styrene in the toaster oven to get it soft enough to work with and while it was still soft I mashed it between the two pieces of Bondo to create a dome shape.

Yes it is tricky but with enough tries I finally got the shape I wanted.
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Kekker
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Post by Kekker » Fri Oct 07, 2016 12:25 pm

When I did my 1/12 Mercury, I wanted to include the escapehatch bulkhead. After getting the right profile for it, I made the arc the right size in a graphics program, printed them out and used them as a template. I cut out radial ribs and glued them around a brass tube on a disc. Filled the spaces between with bondo and smoothed it out with putty. Then I squash molded a couple of bulkheads with styrene.

The part was maybe four-ish inches across and around a third of an inch deep.

Once you get the form made its easy to bang out a bunch.

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DaveVan
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Post by DaveVan » Fri Oct 07, 2016 8:20 pm

Johnnycrash wrote:Plastruct - Page 28 (PDF page 30).
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