Suggested Material for Spray Welding Attachment

[bluesman0007]

We need to replace a piece of equipment on our spray welder, it is called a bore attachment. It appears to be made from nylon, delrin or some type of plastic. It basically carries the welding wire and air through copper tubes down to the weld tip to reach into the bores of tubes etc. for welding. The area where the wires are attached have burned one side of the head. We have inquired to the manufacturer and the price is out of this world. If we could come up with a suitable material we would be farther ahead making it ourselves.

Assuming it was heat resistant and machinable. Not sure why we had the melting but have to assume it was caused by not properly connecting the lead from the welder since the other side is fine.

Any suggestions would be appreciated.

Dennis

 

[unclesyd]

You might look at either of these materials for machining a replacement part.
I have made similar parts out of both materials.

http://www.boedeker.com/peek_p.htm

http://www.boedeker.com/ryton_p.htm

Did the plastic actually melt or just char?
One would think first of Teflon if there was just char.

Was the part glass filled?

 

[bluesman0007]

Thanks for the response.

The head actually melted, the operator said he looked down and it was smoking. I don't think it is glass filled, not sure how to check. Both materials you referenced sounded interesting. The head is about 1-1/2" dia. x 5" lg. so were not talking about a very large part.

Dennis

 

[Pud]

Or "Torlo" if you can get it..polyamide-imide.


Cheers


Harry

 

[Pud]

Sorry, typo - should be "Torlon"

 

[bluesman0007]

Thanks guys,

From what I can gather this doesn't seem to be glass filled. It has been turned in a lathe, milled, drilled and tapped. It's black and I would have to guess it has no fillers at all. It could be as simple as nylon or teflon. I think I'm going to look for something that might stand the heat better than our current part. I have it modeled and printed all I need now is to pick the material.

Thanks again,

Dennis

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