Oozing Goo - The Lava Lamp Syndicate

Hello all, first time here.

I have an old lamp that was my grandma's and I'm a little sentimental about it.  It must be early 70's minimum because I remember it as a child.  I'm sure you all can probably identify it and that might help what I'm trying to do here.  A few years ago the cap cracked, it got cloudy and didn't work good anymore.  I'm in the process of trying to restore it, using the lava formula I found here.  I was about to say goodbye to it because I could not find a replacement cap.  Then I realized I could 3D scan the old cap, use that to build it in CAD, and have a replacement 3D printed!  So the cap should be back from the printer soon and hopefully it fits and the re-lava goes well.  I want to share the file used for the 3D print, it took about 10 hours and some pretty expensive equipment/software to reverse engineer.  The cap only cost $13 to print once I made the file.  I do want to make sure my replacement fits before I upload it.  I will also try to give updates on my overall success with the restore.  Here is a picture of the lamp so maybe someone can identify it.  Hard to tell in picture but it is gold-ish in color, and the cap screws onto the glass threads with an o-ring seal.

Buy it here https://www.shapeways.com/product/4TJ6AR66D/lava-cap-for-70-s-quot-...

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I have a 3d printer, and would be willing to print caps for some people. 

I can do them in ABS plastic, and then place them in an acetone bath to give them a smooth and shiny apperance. 

OMG! This is a gift from GOD!!!  Hooray!!! I signed up for this group a few weeks back to get help on a missing cap on my 1977 Model 100. Your work here SAVED ME.  Thanks so very much!!!!!! Hooray for your ingenuity and for 3-D printers! I'll buy today in white to paint gold. 

HOORAY!!!!!!!! I'll post my finished product here. Thanks again. 

Stacie in Chicago 

Duane-- 

Why didn't you have it printed in metal if that's an option with Shapeways? I am just being nit picky now after my initial thrill that a solution is a Paypal click away. ha. 

Seriously, thanks for doing the work to get this product made. But why not metal if its offered? 

Thanks again and again! 

Stacie 

Stacie,

Yes please give feedback and share you finished project.  I saw you bought one on shapeways, your the 2nd person.  I haven't gotten any feedback from the 1st, or anyone else that might have tried themselves.

Money and two risks were the main reasons I didn't go with metal.  Aluminum would be close to $250 and Stainless would be around $100.  Shapeways also has a way of rating "printability" the first step is an analysis of the file.  Then it goes to a first run beta rating. If that works it goes live for similar materials and colors.  So the first part print is a little bit of a gamble.  The other risk is a little more safety concerned.  The reason why my original cap failed was that my lamp had lost a little fluid over 50yrs.  I added a small amount of RODI water, replaced the cap and turned it on.  I failed to realize the thermal expansion coefficient of the goo.  My bottle had too little air cushion and the top of the cap blew off like a champagne cork.  So I was/am a little paranoid about a metal cap that would be stronger than the glass.  If the pressure got high enough it could explode the bottle  That said I would consider stainless myself if I thought I could get a good polish on it.  Polishing metal is not fun though.  Only if I had the water level adjusted properly with a plastic cap first, would I swap it for a metal one. 

I can set the availability of materials for the part in Shapeways.  If you want to try metal, I'll enable it.  Just realize your the beta tester.

I bought one on Shapeways and I'll share my results. I'm really happy there is finally a way to get a replacement cap. Thanks for creating an alternative to using a Pine-sole cap :)

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