Plastic Repair

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  1. Posts : 9,537
    Windows 7 Home Premium 64bit
       #11

    seekermeister said:
    The Howling Wolves said:
    Seek,
    Have you a local body shop or custom shop you can visit and pick their brains on what they use?
    That's where I would start before going out and buying something that may or may not work.
    THW

    Reasonable advice, except that my experience with professionals has not always been so good. The only way to know how good their advice is to either have used them enough to have gained confidence, or simply take it on blind faith.
    Guess I have been more fortunate as have known this family for years and have had them do work on my vehicles. They were perfectionists!
    You might check with your auto insurance to see where they send or recommend body work to be done.
    I know you want this to be done correctly and going a few extra steps maybe worth the effort. IMHO.
    THW
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  2. Posts : 24,479
    Windows 7 Ultimate X64 SP1
       #12

    Epoxy is not very fast curing and there are different types of ABS plastic which take different solvents to 'weld' them. Sometime on the back of trim panels there is a molded-in label which will ID the type of plastic it is. An auto parts store can give you advice too, they will have a myriad of plastic glues and goos.

    I never thought I'd be back in the parts business in a Windows forum.
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  3. Posts : 6,618
    W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
    Thread Starter
       #13

    I just ordered some 1/8" & 1/16" ABS sheets from an eBay vendor, who I asked the question about the strongest way to do their repair. He had to call some of his experts for the answer, and they said using a slurry made from ABS shavings or pellets mixed with acetone or MEK was best.

    I didn't question him further about this, because I didn't want to be a pest, but now I'm wondering how easily a slurry can be made, of the proper consistency that will permit a close fit between the slices? Hopefully, the repair will be easier than I thought, because I found that the broken portions are just on the door pull/armrest itself, which detaches from the door panel.

    Even those armrests are too expensive for me to just buy a new one, because they are going for ~$120 each.
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  4. Posts : 24,479
    Windows 7 Ultimate X64 SP1
       #14

    Have you tried eBay auto or a salvage yard?
    Plumbers use a solvent and primer for bonding ABS and PVC pipes too, which may help out. Generally, black pipes are ABS, and white are PVC. there are two I'm familiar with, one is a thin pruple liquid and the other a clear, gooey substance. They both smell like Ketone or acetone.
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  5. Posts : 6,618
    W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
    Thread Starter
       #15

    If you are asking whether I tried those place to locate door panels or arm rests, the answer is definitely. While I found places that I could save some money on the door panel, the same isn't true of the arm rest. Everybody wanted about the same amount. Besides, I couldn't beat the deal that I found. A guy in a town ~50 miles from here, had a used door panel that looks like new, except needing the arm rest repaired, and I bought the panel and arm rest for $20 hand delivered. If I could make out like that on the other parts that I need, I would soon have that Blazer running and looking great! However, it appears that I'm stuck with the dealer or a professional repair shop for a couple of things.

    I'm not certain what they are made of, but I've done enough plumbing to know that while those plumbing formulas will stick ABS plumbing pipe together, they are not strong enough to make an ABS slurry with.
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  6. Posts : 24,479
    Windows 7 Ultimate X64 SP1
       #16

    You may have to search for one, but there is plastic welding tech around in body shops. It works a lot like metal welds but I think it uses ultrasonic waves to heat and bond the materials.
    Good job on finding low cost parts.
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  7. Posts : 2,164
    Windows 7 Ultimate 64bit
       #17

    epoxy a metal washer to the panel. paint it black if you please.
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  8. Posts : 6,618
    W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
    Thread Starter
       #18

    Britton30 said:
    You may have to search for one, but there is plastic welding tech around in body shops. It works a lot like metal welds but I think it uses ultrasonic waves to heat and bond the materials.
    Good job on finding low cost parts.
    The plastic supplier that I mentioned also spoke of plastic welding, but he was talking about using a regular soldering iron, which obviously would only be able to effect a surface area, not areas such as between two layers of plastic sandwiched together.

    I hadn't heard of ultrasonic plastic welding, until you mentioned it, so I Googled a bit. Not too surprisingly, what I found costs far more than I can afford. The cheapest was ~$3400 for a little handheld unit, and went much, much higher for more elaborate ones. I imagine that would be practical for a professional, who regularly does a lot of work such as this, but not for a one time project such as mine.

    I'm only guessing, but I would think that even if I found a shop equipped for that kind of job, that they would charge more than I want to pay for fixing my part.
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  9. Posts : 24,479
    Windows 7 Ultimate X64 SP1
       #19

    A soldering iron would be a good idea! I recently got a very small one at Wal*Mart for $5 with a tiny pencil tip for PC wires. You'd likely want a bigger one and they are all reasonable.
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  10. Posts : 6,618
    W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
    Thread Starter
       #20

    I do have a soldering iron now, but I don't know if the tip is as small as you are talking about. I just don't like the idea of only surface welding the plastic parts together...I want a more total fusion of parts than that. I have thought about using a combination of gluing and welding them, but I'm not sure if that is a good idea or not, depending on the kind of glue I end up using. Along with the plastic sheets, I ordered a bag of fine ABS pellets, with the idea of making the slurry from them. I think that would work okay along with welding, but I also have some Plastic Welder glue standing by, and I don't know how it might react to the solder iron.
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