Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

Plastic Welding


  • Please log in to reply
6 replies to this topic

#1 The Dude Abides

The Dude Abides

    WileE Coyote Super Genius

  • Members
  • 2,960 posts
  • West Des Moines, IA

Posted 31 March 2010 - 11:54 AM

So before my brother sold his legacy gt he wanted the split front bumper fixed. He took it to a auto body friend of mine who told him about plastic welding. At first i thought he was full of it but he procedes to pull out a dowel rod picked up at almost any store. Grabes a sodering iron and heats up the plastic and melts it spots along this crack. This crack was about 3ft long. Then after he gets it to hold into place he just melts the plastic into the crack. When it cools down it becomes as hard as original plastic. Then he sands it down flush, alittle bondo and some paint. And you can barely tell anything was done. Has anyone else heard of this before i was just amazed.

#2 doc526

doc526

    USMB Regular

  • Members
  • PipPipPip
  • 113 posts
  • Dallas, GA

Posted 31 March 2010 - 03:59 PM

Yep.

I work at a university and we have a lot of plastic fume hoods where chemical work is performed. Sometimes we have to modify the decks or tanks to accommodate the experiment that the professor or student is doing. :rolleyes:

We use a hot air gun with a narrow nozzle to concentrate the heat and the welding rod is what ever flavor of plastic that we are welding. Most of the time it is polypropylene.

Most car bumpers are ABS which welds ok too.

#3 3eyedwagon

3eyedwagon

    Build it, don't buy it!

  • Members
  • 708 posts
  • Apache Junction

Posted 01 April 2010 - 01:43 PM

I've seen modified TIG torches used in a production based setup. Due to the extremely low melting point of plastics (by welding standards) it doesn't take much amperage from the TIG machine to work. We played around with it a little in college. Kinda neat knowing that it is out there and possible. There's really multiple ways to do it since all you are doing is directing heat. Not something a guy will use every day around here, but amusing none the less.

#4 The Dude Abides

The Dude Abides

    WileE Coyote Super Genius

  • Members
  • 2,960 posts
  • West Des Moines, IA

Posted 01 April 2010 - 01:49 PM

LOL true but thats why i put it in the new gen area because lots of plastic bumper people in there.:grin:

#5 asis

asis

    USMB is life!

  • Members
  • 151 posts
  • La Center

Posted 16 April 2010 - 04:15 AM

It is a common process and called "welding" for a reason. You need the same type of rod as the material you are joining.
It is used heavily in chemical baths, including acid etching baths done to silicon wafers which eventually become computer chips ;)

#6 eulogious

eulogious

    Inspiring Subaneer

  • Members
  • 1,090 posts
  • Olympia, WA

Posted 16 April 2010 - 05:30 AM

I was browsing around Harbor Freight the other day and they had a couple different types of plastic welding kits. I think that the cheapest one was about $45 or something like that. Seemed to come with everything you need to get the job done. First time I had seen anything like that before.

#7 Svengouli7

Svengouli7

    Smile, taste kittens

  • Members
  • 311 posts
  • Bentucky Wa.

Posted 16 April 2010 - 09:45 AM

I have seen the Harbor Freight kits... do you think you could weld up a dash board that had split with sun wear? What kinda plastic is that anyhow??




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users