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Old 01-10-2019, 10:21 AM   #1 (permalink)
 
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Default Turning a 3d Printed Barrel

I did a demo video of turning a 3d Printed pen barrel. Starts from the printed mold and goes to finished barrel for a Sierra type pen.


Video Link: https://www.youtube.com/watch?v=thQrzStslWc


Your comments and questions are certainly welcome.
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Old 01-10-2019, 11:12 AM   #2 (permalink)
 
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Very nice video John.

Bobby
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Old 01-10-2019, 12:06 PM   #3 (permalink)
 
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John, are these ever a neat idea, they would be great for people who would like to choose their own colors for a blank. And for other reasons as well, hopefully they will be good sellers for you. I do have one issue though, and it is about how strong these blanks would be. Wouldn't they break apart if dropped on a cement or other hard floor? What would stop the small pieces from breaking away, seeing as how everything is being divided by plastic? What or how are the small pieces held in place, would the heat generated from the epoxy setting up be enough to melt them together?

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Old 01-10-2019, 12:21 PM   #4 (permalink)
 
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That is an awesome blank....very nice.
You need to get rid of that glove though.....you need to read some horror stories of Woodworkers that wear gloves. A turner in my club says, "the only thing gloves do is keep track of the severed finger after the accident they cause"
just my .02....
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Old 01-10-2019, 12:56 PM   #5 (permalink)
 
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Mike, that is the only time I use a glove. Those little pieces of plastic whipping around hurt like heck. After the case in turned off, no glove.
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Old 01-10-2019, 12:57 PM   #6 (permalink)
 
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Very nice. Would like to see more double barrel molds.
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Old 01-10-2019, 01:00 PM   #7 (permalink)
 
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Len, thanks for the comments. I have actually dropped one on my shop floor and it don not break or separate. Only one test so far. They would be like other segments and acrylics, some will break if dropped. The small pieces are actually 'walls' in the mold. All the walls are attached at intersections. Heat from the epoxy does not melt the plastic. I am going to be using another plastic that has heat properties that will stand up to Alumilite type resin.
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Old 01-10-2019, 01:02 PM   #8 (permalink)
 
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I asked this in another thread you started so it is a redundant ??? but will all resins adhere to this plastic?? I know not all glues work well with all plastics. Have you tested with the resins being used today?? I know silmar has a tendency to shrink a bit. Does the plastic need to be treated in any way such as sanded to give tooth or a chemical used to give it a tooth?? Thanks.
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Old 01-10-2019, 01:02 PM   #9 (permalink)
 
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Tony, I am working on double molds as time allows. What would you like to see next?
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Old 01-10-2019, 01:04 PM   #10 (permalink)
 
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John T. I have tested with Liquid Diamonds, Black Palm, and Amazing Clear Cast. That is all I have tried to date.
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