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Discuss OT, car repair: Do those cheap plastic welders really work? in the alt.autos.volvo forum at Car Dealer Forums; http://www.harborfreight.com/cpi/cta...emnumber=41592 I got one of this from HF but non of the plastic rods stick ...
  1. #1
    ** Frank **
    Guest

    Default OT, car repair: Do those cheap plastic welders really work?

    http://www.harborfreight.com/cpi/cta...emnumber=41592

    I got one of this from HF but non of the plastic rods stick to anything. I
    was hoping to fix my bumper and some plastic parts. Ended up using epoxy on
    one side plus a thin layer of fiber reinforced Bondo on the other side and
    that may not work too well either. Has any of you make this type of welding
    unit work. I'm playing around with it, perhaps its my technique. Not new to
    steel welding, just not plastic.Oh well.

    The ones I saw that work are some industrial units that are price way out of
    my range for just an occasional repair.





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  2. #2
    z
    Guest

    Default Re: OT, car repair: Do those cheap plastic welders really work?

    On Jul 25, 11:39 am, "** Frank **" <noem...@xyz.net> wrote:
    > http://www.harborfreight.com/cpi/cta...emnumber=41592
    >
    > I got one of this from HF but non of the plastic rods stick to anything. I
    > was hoping to fix my bumper and some plastic parts. Ended up using epoxy on
    > one side plus a thin layer of fiber reinforced Bondo on the other side and
    > that may not work too well either. Has any of you make this type of welding
    > unit work. I'm playing around with it, perhaps its my technique. Not new to
    > steel welding, just not plastic.Oh well.
    >
    > The ones I saw that work are some industrial units that are price way out of
    > my range for just an occasional repair.


    How does that thing work? Does it burn acetylene?


  3. #3
    ** Frank **
    Guest

    Default Re: OT, car repair: Do those cheap plastic welders really work?


    "z" <gzuckier@snail-mail.net> wrote in message
    news:1185480439.454817.50440@l70g2000hse.googlegro ups.com...
    > On Jul 25, 11:39 am, "** Frank **" <noem...@xyz.net> wrote:
    >> http://www.harborfreight.com/cpi/cta...emnumber=41592
    >>
    >> I got one of this from HF but non of the plastic rods stick to anything.
    >> I
    >> was hoping to fix my bumper and some plastic parts. Ended up using epoxy
    >> on
    >> one side plus a thin layer of fiber reinforced Bondo on the other side
    >> and
    >> that may not work too well either. Has any of you make this type of
    >> welding
    >> unit work. I'm playing around with it, perhaps its my technique. Not new
    >> to
    >> steel welding, just not plastic.Oh well.
    >>
    >> The ones I saw that work are some industrial units that are price way out
    >> of
    >> my range for just an occasional repair.

    >
    > How does that thing work? Does it burn acetylene?
    >


    No, its an electric heat gun with the filtered air controlled by the
    pressure regulator. So you need an air compressor with an air filter and
    120V outlet.

    Works like TIC welding: You hold the furnished plastic rod (3 types of rods
    furnished with kid) that matches with the bumper material and the tip blows
    hot air on the rod and damaged area together so the parts bond together. A
    good plastic bond would be stronger than the mother material - just like
    good welding and solid wood glued joints.

    High learning curve to make it work, just like TIC welding. Playing around
    with it now.





  4. #4
    ** Frank **
    Guest

    Default Re: OT, car repair: Do those cheap plastic welders really work?


    "Roadie" <hjsjms@cs.com> wrote in message
    news:1185451720.947437.163180@19g2000hsx.googlegro ups.com...
    > On Jul 25, 11:39 am, "** Frank **" <noem...@xyz.net> wrote:
    >> http://www.harborfreight.com/cpi/cta...emnumber=41592
    >>
    >> I got one of this from HF but non of the plastic rods stick to anything.
    >> I
    >> was hoping to fix my bumper and some plastic parts. Ended up using epoxy
    >> on
    >> one side plus a thin layer of fiber reinforced Bondo on the other side
    >> and
    >> that may not work too well either. Has any of you make this type of
    >> welding
    >> unit work. I'm playing around with it, perhaps its my technique. Not new
    >> to
    >> steel welding, just not plastic.Oh well.
    >>
    >> The ones I saw that work are some industrial units that are price way out
    >> of
    >> my range for just an occasional repair.

    >
    > I think you overpaid for what you got. This would have worked as
    > well or better:
    > http://www.hardwarestore.com/media/p...1_front500.jpg
    >
    >





    LOL, this has no structural value - duct tape would been better than this
    for the bumper! I've repaired mufflers and tailpipes with a wire feed welder
    but many times as the corrosion is so bad, its just better replace the
    suckers. BTW, for tailpipes and mufflers, foil works pretty well, the one
    with sticky back for HVAC. YMMV.



  5. #5
    Roadie
    Guest

    Default Re: OT, car repair: Do those cheap plastic welders really work?

    On Jul 25, 11:39 am, "** Frank **" <noem...@xyz.net> wrote:
    > http://www.harborfreight.com/cpi/cta...emnumber=41592
    >
    > I got one of this from HF but non of the plastic rods stick to anything. I
    > was hoping to fix my bumper and some plastic parts. Ended up using epoxy on
    > one side plus a thin layer of fiber reinforced Bondo on the other side and
    > that may not work too well either. Has any of you make this type of welding
    > unit work. I'm playing around with it, perhaps its my technique. Not new to
    > steel welding, just not plastic.Oh well.
    >
    > The ones I saw that work are some industrial units that are price way out of
    > my range for just an occasional repair.


    The problem you will have is mating the plastic components. The two
    materials have to both melt at about the same temperature and the
    materials themselves have to be compatible, i.e. they will fuse
    together. I suspect that some plastics may not combine well if at all.


  6. #6
    z
    Guest

    Default Re: OT, car repair: Do those cheap plastic welders really work?

    On Jul 28, 11:04 am, Roadie <hjs...@cs.com> wrote:
    > On Jul 25, 11:39 am, "** Frank **" <noem...@xyz.net> wrote:
    >
    > >http://www.harborfreight.com/cpi/cta...emnumber=41592

    >
    > > I got one of this from HF but non of the plastic rods stick to anything. I
    > > was hoping to fix my bumper and some plastic parts. Ended up using epoxy on
    > > one side plus a thin layer of fiber reinforced Bondo on the other side and
    > > that may not work too well either. Has any of you make this type of welding
    > > unit work. I'm playing around with it, perhaps its my technique. Not new to
    > > steel welding, just not plastic.Oh well.

    >
    > > The ones I saw that work are some industrial units that are price way out of
    > > my range for just an occasional repair.

    >
    > The problem you will have is mating the plastic components. The two
    > materials have to both melt at about the same temperature and the
    > materials themselves have to be compatible, i.e. they will fuse
    > together. I suspect that some plastics may not combine well if at all.


    Yike. I've just spent a weekend trying to fix some kind of big plastic
    storage bin (ok, i have too much time on my hands) which involves
    figuring out what kind of more or less clear plastic it is, and/or
    what the melting temp is; neither of which I could do. (my cute little
    $10 IR thermometer was doing OK on the melting point test until it
    started to register "HIGH" just above 250 fahrenheit or so, when the
    plastic was still looking good).


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