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Senior Slot Car Mechanic
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Discussion Starter · #1 ·
Here's my first go at doing a two part molded body.It came out quite nicely.







Next up,BT19
 

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Absolutely MARVELOUS!! Please tell me... how in the heck do you determine wall thickness. I won't sleep until this one is figured out. Any word/notes on the process?

-Maltese
 

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great job on the body........ please tell us more on how you did it.... I have studied the article that Mark gussin did up.... are you doing it the same way???? pictures of how the mold was done up would be nice too.....

Chris
 

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I asked Al but he told me he was sworn to secrecy.
At least that was his story. I say we start an email campaign and demand he comes clean.
 

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Phil Kalbfell
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good job Al,not really that hard is it? The wall thickness is dictated by the original. Mark Gussins site does explain this very well. There is also a Yahoo casting DL if you are interested,that gives details of vacuum chambers for making moulds and pressure chambers for casting.

The biggest problems are getting all the air bubbles out of the silicone mould before it sets.

Phil
 

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Discussion Starter · #8 ·
QUOTE The biggest problems are getting all the air bubbles out of the silicone mould before it sets

That's what the vacum chamber is for.But,you have to be carefull,when I vacumed the rubber for the postive half of the mold,the vacum chamber sucked it all out of the pot,I had blue goop EVERYWHERE.


It looked like a thick blue milkshake had exploded in the pot.
 

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Phil Kalbfell
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Al: Someone forgot to tell you that the vacuum has to be adjustable! A window is a good idea on the vac chamber! All very good in hindsite! But wait the next ones get easier.

Phil
 

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Discussion Starter · #10 ·
Naw,I just need to go back to my old mixin pot which is wider across.This gives the rubber room to climb the walls a bit,but still stay in the pot.

I have vacumed dozens of potfulls of rubber(for my inserts),and this was my first disaster.I did manage to scrape enough together to get the mold finished,so it wasn't a total loss.

Just gotta figure out what to do with a big pile of blue fake dog baaaaaarrrrffff.
 

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QUOTE Mark Gussins site does explain this very well. There is also a Yahoo casting DL if you are interested,that gives details of vacuum chambers for making moulds and pressure chambers for casting. Any chance of the link Phil, or direction to the article


Thanks,
Bill.
 
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