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Jumbo Dake

Casting a jumbo Dake in gray iron

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PatJ10/03/2019 17:00:07
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41 forum posts
28 photos

I bought a Prusa MK3 printer the other day, and decided to print out the patterns for a jumbo-sized Dake engine as a trial run.

So far I am quite impressed with the little printer, and it has basically been running 24/7 for over a week without any problems.

This will be on the large size for a model engine, but I like to straddle the line (or cross it) between models and small workshop engines.

My eyesight is not good these days, so this is basically an engine version of a large print book for the visually impaired.

The engine will be poured in gray iron using my backyard oil-fired furnace.

I will probably pour permanent patterns in 356 aluminum first, since the plastic tends to get brittle over time, and some of the printed patterns are pieced together from multiple printed pieces.

 

Edited By PatJ on 10/03/2019 17:07:01

PatJ10/03/2019 17:05:59
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41 forum posts
28 photos

Here are a few photos of the printed patterns so far.

The surfaces inline with the pattern pull have a minimum of 5 degrees draft.

Bearings will be poured babbitt.

rimg_2947.jpg

 

rimg_3082.jpg

rimg_3088.jpg

rimg_3089.jpg

trim-comparision.jpg

Edited By PatJ on 10/03/2019 17:11:20

PatJ10/03/2019 17:08:58
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41 forum posts
28 photos

This is my furnace in action.

The crucible lift is at 1:00.

https://www.youtube.com/watch?v=Pj6lY7LdlLc

Edited By PatJ on 10/03/2019 17:10:35

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