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TOPIC: Strengthening/Gluing HDU

Strengthening/Gluing HDU 27 Feb 2017 11:11 #1

  • Jason Soles
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Hi all!
I created a large 3D carving... It took over 18 hours... I need to work on larger tooling, and better tool pathing strategies. Anyway it is done.

I have two questions..

1. What adhesive would you use to glue the two halves together? I am not of fan of the expansion PU (Gorilla glue)

2. What if anything can be used on the outside of HDU to strengthen it? Epoxy?

Some of the tiny parts have broken off I was hoping to give it some more resilience...

Thank you in advance,
Jason

Strenthing/Gluing HDU 27 Feb 2017 11:22 #2

  • James Dawson
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PB Bond works great on HDU and is made by Coastal Enterprises. It does expand some though.

We also use West Systems Epoxy when we cannot have any expansion.
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Strengthening/Gluing HDU 27 Feb 2017 21:22 #3

  • Dan Sawatzky
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We use 30 lb Precision Board which is much stronger. We also cut a slot in the back and glue in an insert of steel tubing or rod.

- grampa dan
Dan Sawatzky
Sawatzky's Imagination Corporation
Yarrow, British Columbia, Canada

www.imaginationcorporation.com


Being a grampa is the most wonderful thing!
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Strengthening/Gluing HDU 28 Feb 2017 15:07 #4

  • Bob Stephens
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I use a ton of Loctite PL Construction adhesive, particularly the 8X Premium. Sest up fast, about an hour and a half and has minimal to no expansion. This crap is strong!!! It's about $4 more expensive than their 3X stuff, but the speed at which is cures is worth it to me.
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Strengthening/Gluing HDU 02 Mar 2017 16:05 #5

  • Jason Soles
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I would have to spend several thousand dollars to get 30# to my door... Best I can get reasonably and at the quantities I can afford is 18# Jasper

Strengthening/Gluing HDU 02 Mar 2017 16:06 #6

  • Jason Soles
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I am trying that :)

Strengthening/Gluing HDU 04 Apr 2017 20:58 #7

  • Jeff Holmes
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What are you spreading that with?

I don't care for the Gorilla glue either......Once I used it and it worked great. The next time, I spread it too thing and it didn't hold on a thin profile edge. Last time, I spread it a little thicker and it worked fine. As expensive as HDU is, I'd like to be a little more confident in the joint. I guess on a large, flat area it works ok. I was using a credit card to spread it. Maybe it needs some very fine notches for a consistent line.
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