Popular Woodworking 2001-12 № 125, страница 21
Flexner on Finishing continued from page 34 closed in a box to keep overspray from building up on it. Place the box with the enclosed fan in a window, possibly resting on a stand just in front of the window and seal the spaces between the box and window opening. Then hang plastic curtains from the ceiling on either side of the fan running out about 8 feet from the window wall. If the window is near a side wall, you could use it as one side of your booth instead of a curtain. You want the curtains to be wide enough apart so you can stand inside, or just outside, the tunnel when spraying. The best curtains to use are heavy, fire-resistant, "Industrial Curtain Partitions" with supplied ceiling tracking that are available from auto-body supply stores, Grainger's or Goff's Curtain Walls (800234-0337). But you can use any type of plastic sheeting with the downside being that if the plastic is very light, it might be sucked in a little by the exhaust fan. Mount the curtains to tracking on the ceiling so they can be pushed back when you aren't spraying and pulled open when you are. This way, you lose almost no space in your workshop. Don't forget that you still need to wear a respirator while spraying with this exhaust system. I recommend a respirator with organic-vapor cartridges. (Lee Valley Tools sells one for $37.50. Phone: 800-871-8158). For lighting, recess a four-tube, four-foot fluorescent fixture between the joists in the ceiling as close as possible to the window and shield the lights from contact with overspray by inserting glass plates between the light and the ceiling. For the best color balance, use full-spectrum fluorescent bulbs. To avoid a fire hazard with your spray booth, it's essential that you keep it clean. Sweep the floor after each job and clean or replace the filter. If finish starts to cake on the curtains or fan box, clean or replace them. PW Bob Flexner is a nationally known finishing expert in Norman, Oklahoma, and the author of "Understanding Wood Finishing." SOURCES Probably the biggest decision you have to make when building this system for your home is in selecting a fan.You have a few choices here. All-in-one Units: By spending a little money,you can make things simple. Grainger (www.grainger. com; 888-361-8649) sells exhaust fans for areas with flammable or explosive vapors.Some examples include: • Dayton 16" Panel Fan; cast aluminum blades; max cfm: 1,215; stock # 3XK37, price $435.25. • Dayton 16" Exhaust Fan; cast aluminum blades; max cfm: 1,980; stock #4C369;price $457.25. • Other sizes are available. Motor-Separate Units:You also might be able to find a belt-driven fan without a motor from an industrial supply company.With these, you can mount aTEFC or explosion-proof motor outside of the path of the airflow as described in the article. FILTERS: Use the standard blue woven furnace filters you can find at any home center store. Make sure that they are not too dense; some filters can greatly reduce your airflow. Be sure to clean the filter after each project. Popular Woodworking Books is looking for the best jigs and fixtures that you, our readers, have built. We're creating a new book specifically to showcase your work! Winners will receive: TT 2nd Place The new Delta 22-580 planer, and your jig or fixture will be featured on the back cover of The Best Jigs & Fixtures in the World! EL 1st Place A Delta Unisaw, and your jig or fixture will be featured on the front cover of The Best Jigs & Fixtures in the World! 3rd Place The new cordless Porter-Cable router, and your jig or fixture will be featured on the back cover of The Best Jigs & Fixtures in the World! Additional Winners Additional jigs and fixtures will be featured on interior pages of The Best Jigs & Fixtures in the World, and all winners will receive 5 copies of the book upon publication! Entry Guidelines 1. Submit two slides or two 4"x 6" photographs of your completed jig or fixture, along with a sketch, a parts and cutting list, and a brief explanation of how the jig or fixture works. 2. All material used in the book becomes the property of Popular Woodworking Books. 3. Entries must be received by January 21, 2002. POPULAR WOOD WORKING BOOKS a g e gs s e |
