Sign & Digital Graphics

July '16

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S I G N & D I G I T A L G R A P H I C S • July 2016 • 67 For this sign, each post cap serves as a retainer, and they are held in place with two small rivets each. Signs of this type are clean and professional in their appearance, show virtually no hardware, but are actually easy to fabricate. One last illustration is a job we did lately that isn't really a sign, but is a deco- rative panel or wall divider that we built several of for multiple restaurant loca- tions. This was an artistically designed (by their interior designer) panel that had a square tubing frame, and translucent acrylic pieces that fit in a three-layer framework. The center unit of the interior frame that would not show was cut very pre- cisely to match the circle shaped acrylic inserts and the inside dimension of the rectangular frame. This was to be sand- wiched by two similar but overlapping frame pieces, one for the right side and one for the left, which would serve as retainers and visible face elements of this custom unit and in which would be no visible hardware. The process was to weld the center framework in the rectangular tubing frame, and working from the inside, tack- weld one of the retainer frame members in place with welds that would not show. But the nal retaining frame member also needed to show no fasteners of any type, so the solution had to be some type of adhesive of course. But, since the nal assembly of the last section of the frame would go on after all parts were pow- der coated, the surfaces being adhered together would be covered with a tough lm of powder coating. This powder, and many others, was actually a heat-cured polyester coating, the most common chemistry for powder coated nishes. So, the proper adhesive was one spe- cically formulated for plastic (polyes- ter), not metal or even paint. Slade did some research and found a suitable two- part adhesive made by LockTite, mixed it and applied it carefully using a large syringe. The cure time was a few hours, so it was easy to work with. This unusual item, once finished showed no fasteners at all. Most of the fastening was done with hidden welds, and the last part with an appropriate and specic adhesive. These are just a few ways to get the hardware out of sight on various sign projects, and for sure there are many oth- ers. The ones shown here are easy and add little cost, and are worth the extra effort. After all, we can all appreciate a clean, professional sign job when we see one, especially if it's one of ours. SDG This project, not really a sign but a custom room divider panel for a restaurant, uses hidden welds and one top retainer piece shown here weighted down and glued into place. Three layers of aluminum, two welded in place with inside welds and one secured with adhe- sive, produced another job where no fasteners were left showing, in fact no fasteners were actually used. Choosing the right adhesive is critical, and this one works with the hardened plastic finish of a powder-coated surface.

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