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Welding Plastic?

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Old Oct 17, 2004 | 09:28 AM
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Default Welding Plastic?

I hit the Harbor Freight store yesterday for a new torque wrench and noticed a plastic welder for 29.99. Anybody ever used one? I was wondering how good they work?
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Old Oct 17, 2004 | 09:34 AM
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we used one at work to repair a couple plactic product chutes.
it would have worked alot better if we knew how to use it.
its like 15 trs old and had no directions. but it worked ok
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Old Oct 17, 2004 | 10:20 AM
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plastic burns quickly, the trick is to keep the heat source far enough away so the plastic will just melt

takes a little practice, but its not rocket science
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Old Oct 17, 2004 | 12:15 PM
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also.....have to use the same type of plastic to weld two peices together..... if u try to weld a pc of plastic back together and use a different type as your welding rod, it wont stick.
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Old Oct 17, 2004 | 03:31 PM
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Many times you can just use a hot solder gun to do plastic welds. I have made repairs to cracked plastic by heating it and melting the plastic to form a weld. With this method no welding rod is required. Plastic welds are not the prettiest thing in the world. Iwould not do in a aarea that was visiable.
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Old Oct 17, 2004 | 04:41 PM
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Anybody remember the toy years back where you build a working dragster or other car? It came with plastic I-beams, rivets, and such. You'd cut and weld everything together with a little hand held motor called a "spin welder". Came with loads of little plastic rods that slip over the nipple that protruded out and spun. The friction would melt the plastic rod and the work piece, and you could actually create a nice looking bead that was strong. It was pretty cool, it kept our old refrigerator alive way past it's "due date." Anyway, wouldn't mind finding another for those odd plastic welding jobs.

Just a thought. Would be much for big jobs, though.
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Old Oct 17, 2004 | 04:55 PM
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Some of us still build models... learning how the tool works is the trick.
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Old Oct 17, 2004 | 07:59 PM
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good ones cost around 350 bucks and use hot air.you use a filler rod stick in the process.its much like gas welding.
hippyheads statement is true.the type of plastic is key to success.some plastics work better than others also.where ive seen (and used) professional plastic welds is on 4 wheeler fenders.to have a honda or suzuki fender welded is 5 bucks an inch at local dealers here.
plus you live with the scar since the color is the plastic.no paint.
but hey 30 bucks for a 6in tear beats 150 dollar fender.
newer snowmachine cowlings are some kinda weird compound that doesnt seem to weld worth beans btw.
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Old Oct 18, 2004 | 01:18 AM
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Originally Posted by OneRedLT4
Anybody remember the toy years back where you build a working dragster or other car? It came with plastic I-beams, rivets, and such. You'd cut and weld everything together with a little hand held motor called a "spin welder". Came with loads of little plastic rods that slip over the nipple that protruded out and spun. The friction would melt the plastic rod and the work piece, and you could actually create a nice looking bead that was strong. It was pretty cool, it kept our old refrigerator alive way past it's "due date." Anyway, wouldn't mind finding another for those odd plastic welding jobs.

Just a thought. Would be much for big jobs, though.
I remember those. I had one as well. I think the popularity went away as they ran off those big 9v lantern batteries and they are no longer available. You can only get a 6v now.
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Old Oct 18, 2004 | 02:43 AM
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Originally Posted by OneRedLT4
Anybody remember the toy years back where you build a working dragster or other car? It came with plastic I-beams, rivets, and such. You'd cut and weld everything together with a little hand held motor called a "spin welder". Came with loads of little plastic rods that slip over the nipple that protruded out and spun. The friction would melt the plastic rod and the work piece, and you could actually create a nice looking bead that was strong. It was pretty cool, it kept our old refrigerator alive way past it's "due date." Anyway, wouldn't mind finding another for those odd plastic welding jobs.

Just a thought. Would be much for big jobs, though.
I vaguely remember that. How can pokeman replace building a dragster?
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