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Forum topic by FreeRangeWoodworker posted 03-29-2017 12:06 AM 469 views 0 times favorited 5 replies Add to Favorites Watch
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FreeRangeWoodworker

22 posts in 294 days


03-29-2017 12:06 AM

I purchased a commercial zero clearance made from plastic (UHMW, whatever that is). I now realize that it has a bow in it. Any ideas on how to flatten it?

-- Life is what you make of it.


5 replies so far

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MrUnix

5990 posts in 2034 days


#1 posted 03-29-2017 12:20 AM

I don’t know if it will work, but UHMW has a rather low melting point – so you could throw it in the oven for a few minutes at around 250-300F to soften it up, then clamp it between two boards until it cools. I know it works with HDPE, which is also polyethylene, and what I make my band saw and scroll saw inserts out of from recycled milk and fabric softener jugs (using the oven at 350F).

Cheers,
Brad

PS: UHMW is ultra-high molecular weight polyethylene (sometimes also called UHMWPE). HDPE is high density polyethylene. Both are very similar in properties.

-- Brad in FL - In Dog I trust... everything else is questionable

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RogR

107 posts in 700 days


#2 posted 03-29-2017 01:43 PM



I don t know if it will work, but UHMW has a rather low melting point – so you could throw it in the oven for a few minutes at around 250-300F to soften it up, then clamp it between two boards until it cools. I know it works with HDPE, which is also polyethylene, and what I make my band saw and scroll saw inserts out of from recycled milk and fabric softener jugs (using the oven at 350F).


OK, I’m intrigued. How do you do this? You are laminating layers of milk jugs together in the oven? And how does this sit with Mrs Unix?

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MrUnix

5990 posts in 2034 days


#3 posted 03-29-2017 02:24 PM

OK, I’m intrigued. How do you do this?
- RogR

A quick search on this site for HDPE will give you tons of info, or google HDPE recycling… and there is no smell or fumes, so the KOTW (keeper of the whip) doesn’t even know :) This thread has a bit more info in it, and is probably what got me started: Milk-jug mallet

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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RogR

107 posts in 700 days


#4 posted 03-30-2017 01:50 PM



A quick search on this site for HDPE will give you tons of info, or google HDPE recycling… and there is no smell or fumes, so the KOTW (keeper of the whip) doesn t even know :) This thread has a bit more info in it, and is probably what got me started: Milk-jug mallet

Neato. Thanks for resurrecting that, Brad.

Mr. McGuire: I want to say one word to you. Just one word.
Benjamin: Yes, sir.
Mr. McGuire: Are you listening?
Benjamin: Yes, I am.
Mr. McGuire: Plastics.

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Carloz

966 posts in 427 days


#5 posted 03-30-2017 02:34 PM

If it is as you say commercial , the manufacturer or the seller should replace it. One thing if you got it on craigslist for near nothing you might tinker with it, another if you paid full price for a brand new item.

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