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Dip Painting

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  • John H.
    Beyond Control Poster
    • December 1, 1997
    • 16513

    #16
    Re: Dip Painting

    Most Chevrolet assembly plants used a prime process called "Flow-Coat" for black prime coating of miscellaneous brackets, braces, etc. (and the steel-body car plants also used it for wheels, hoods, fenders, rad supports, header panels, etc.).

    In this process, after high-temp degreasing, washing, rinse, and phosphating, the parts went through a fully-enclosed spray booth with a grated floor over a sump tank; the booth was full of spray heads (like showerheads) that showered a continuous flow of black lacquer primer at the parts passsing through the booth on an overhead conveyor (both individually-hung large parts and piles of small parts in wire baskets). The excess runoff of paint went through the grates in the floor back into the sump tank and was recirculated continuously.

    The parts then passed through an oven and were unloaded into baskets and boxes by part number and taken to the assembly line. Runs, pools, puddles, and blisters of primer were common, as the parts were stationary on the hooks as they passed through the process, and they appeared to have been "dipped"; the "Flow-Coat" process was commonly referred to as "dip-prime", as the results were the same.

    The "cement-mixer" process Tony mentioned was another variation used at some locations for small parts.

    Comment

    • Patrick H.
      Beyond Control Poster
      • December 1, 1989
      • 11608

      #17
      Re: Patrick; thinner ratio

      Thanks Gary.
      Vice-Chairman (West), Michigan Chapter NCRS
      71 "deer modified" coupe
      72 5-Star Bowtie / Duntov coupe. https://www.flickr.com/photos/124695...57649252735124
      2008 coupe
      Available stickers: Engine suffix code, exhaust tips & mufflers, shocks, AIR diverter valve broadcast code.

      Comment

      • Lyndon S.
        Expired
        • April 30, 1988
        • 1027

        #18
        Re: Dip Painting

        That process that you describe sure must have used a lot of paint.

        Comment

        • John H.
          Beyond Control Poster
          • December 1, 1997
          • 16513

          #19
          Re: Dip Painting

          Kelly -

          That Flow-Coat booth had paint coming from EVERYWHERE, but the runoff, drippage, and paint that didn't hit a part just went through the floor grates into the sump and was recirculated. Paint was replenished by pouring it into the sump.

          Comment

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