Driver Casting Repro

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jlakes85
Posts: 209
Joined: Thu Feb 23, 2012 6:07 am

Driver Casting Repro

Post by jlakes85 » Sat May 11, 2019 2:16 pm

Hi All,

My first attempt at a pattern and repro. Next step is to pour the 8002 again and get the plastic pattern. Thoughts/comments?

-jlakes85
20190511_151241.jpg

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Greg_Lewis
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Joined: Wed Jan 15, 2003 2:44 pm
Location: Fresno, CA

Re: Drivre Casting Repro

Post by Greg_Lewis » Sat May 11, 2019 6:47 pm

My thoughts and comments are: Congrats. Folks who haven't done that don't know how much work goes into it.
Greg Lewis, Prop.
Eyeball Engineering — Home of non-interchangeable parts.
Our motto: "That looks about right."
Celebrating 30 years of turning perfectly good metal into bits of useless scrap.

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Builder01
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Joined: Mon May 18, 2015 5:26 am
Location: Erie, PA

Re: Drivre Casting Repro

Post by Builder01 » Sat May 11, 2019 8:39 pm

Looks nice. Will this be in iron?

David

jlakes85
Posts: 209
Joined: Thu Feb 23, 2012 6:07 am

Re: Driver Casting Repro

Post by jlakes85 » Sun May 12, 2019 7:03 am

Thanks Dave, yes this will be gray iron.

Greg, I had to use 2 kwik cast gallon kits to get enough material..I made the pouring window probably by seconds..even with a few dry runs and a clean floor😁

jlakes85
Posts: 209
Joined: Thu Feb 23, 2012 6:07 am

Re: Driver Casting Repro

Post by jlakes85 » Sun May 12, 2019 7:04 am

There were some spots where it grabbed for one reason or another. Can anyone recommend a method to check over the negative before I pour the positive to avoid future issues?

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Fred_V
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Re: Driver Casting Repro

Post by Fred_V » Sun May 12, 2019 7:17 am

Do you have enough draft on the pattern to let it release?
Fred V
Pensacola, Fl.

jlakes85
Posts: 209
Joined: Thu Feb 23, 2012 6:07 am

Re: Driver Casting Repro

Post by jlakes85 » Sun May 12, 2019 7:33 am

Hi fred,

Yes, I should be good on the major surfaces and I did use beeswax in the questionable corners. I think I screwed up by not getting the actual BCC release agent. I thought I could skate by using a furniture polish, as did McCord on YT when he poured that Wright brothers engine, but they was to release the pattern from the sand, not repro plastic..lesson learned l and I still have a master pattern to tell the tale..😁

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Fender
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Location: Chattanooga TN

Re: Driver Casting Repro

Post by Fender » Sun May 12, 2019 7:46 am

I assume the pattern was a 3D-printed model. These often have ridges or lines on the surface, which must be filled with paint or sanded off to get a clean pull from the mold. Is this a problem with yours?
Dan Watson

jlakes85
Posts: 209
Joined: Thu Feb 23, 2012 6:07 am

Re: Driver Casting Repro

Post by jlakes85 » Sun May 12, 2019 9:21 am

Hi Dan,

This pattern is made from poplar, piece by piece. Some of the joints were challenging to fit and might have some issue areas. I'm going to order the proper BCC release agent before pouring the repro

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Trainman4602
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Location: New Jersey

Re: Driver Casting Repro

Post by Trainman4602 » Mon May 13, 2019 3:11 pm

Hi have made several videos about this process on you tube watch them
ALLWAYS OPERATING MY TRAIN IN A SAFE MANNER USING AUTOMATIC AIR BRAKES

Harold_V
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Location: Onalaska, WA USA

Re: Driver Casting Repro

Post by Harold_V » Mon May 13, 2019 3:43 pm

jlakes85 wrote:
Sun May 12, 2019 7:03 am
yes this will be gray iron.
Have you considered ductile instead? Far more reliable.

H
Wise people talk because they have something to say. Fools talk because they have to say something.

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Builder01
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Joined: Mon May 18, 2015 5:26 am
Location: Erie, PA

Re: Driver Casting Repro

Post by Builder01 » Mon May 13, 2019 4:55 pm

Harold_V wrote:
Mon May 13, 2019 3:43 pm
jlakes85 wrote:
Sun May 12, 2019 7:03 am
yes this will be gray iron.
Have you considered ductile instead? Far more reliable.

H
Reliable? How does gray iron fail?

David

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