Awards & Engraving

June '18

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A&E JUNE 2018 • 61 Sandcarving lights and shadows as you carve a glass piece, thus making it impossible to judge the depth you have achieved. We use magnetic lights with a flexible goose neck, which allows us to change the light position at any time and bend it to the exact angle needed when doing elaborate art pieces. These lights can accommodate regular light bulbs or Halogen lights, whichever you prefer. Other cabinets have fixed light sources. Every cabinet has a shelf as a bottom inside that is made from expanded metal. This allows you to place items onto the shelf and let any abrasive fall through it and into the bottom of the cabinet, which has a funnel shape (often called a hopper) where any loose abrasive accumulates. At the bottom of the hopper is the point where a pressure pot is attached if you want that type of configuration. There would also be a screen installed, which catches any con- taminants and prevents them from falling into the attached pot. Otherwise there is a spring-loaded trap door at the bottom of the hopper through which the abrasive can be emptied out for recycling into the free- standing pressure pot. If you will be standing in front of the cabinet while working, it is important to get the cabinet, or yourself, to such a height that you can comfortably stand in front of it without having to bend down while inserting your hands into the cabinet. This can mean having to raise the cabinet if you are tall or building a platform to the cor- rect height if you are short. For a sit-down cabinet, you want to use an adjustable chair to get yourself into the right position. There are large cabinets that are called pass-through cabinets; they are their own category. These cabinets are used to blast large architectural glass pieces. The cabinet is constructed to be able to be separated into two halves (clam-shell) with thick gaskets at the seams and a way to lock the two halves together after a large piece is inserted into the cabinet. Because of this mechanism, one can actually blast glass that is larger than the cabinet. These cabinets have rollers on which the large glass can glide, as well as outriggers: additional rollers on a steel beam that are supported by legs. All cabinets have a dust collector attached to them. In order for that to work, there not only needs to be a place where the dust collector hooks up to, but also another port with a baffle to allow air to get into the cabinet. The air inlet is usually opposite the opening where the dust col- lector attaches; more about that next time when I will discuss dust collection systems and abrasive reclaimers. © Ruth L Dobbins 2018 A&E

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