Make a fiberglass fan shroud

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(Measurement and analysis)
(Constructing the foam buck)
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[[Image:7box o scrap foam.JPG|thumb|center|600px|Leftover scraps of polyurethane foam are useful for constructing a buck.]]  
 
[[Image:7box o scrap foam.JPG|thumb|center|600px|Leftover scraps of polyurethane foam are useful for constructing a buck.]]  
  
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===Shaping the foam===
 
Cut foam to shape with a handsaw, putty knife, or bandsaw. Then, fit and glue pieces of foam larger than your layout on the board. A hot melt glue gun makes gluing this foam fast and easy. Glue the foam down with an expanding urethane glue, or some of the expanding foam that comes in an aerosol can. The different glues can make sanding over seam lines difficult, as they are usually a different density and hardness than the surrounding foam.  
 
Cut foam to shape with a handsaw, putty knife, or bandsaw. Then, fit and glue pieces of foam larger than your layout on the board. A hot melt glue gun makes gluing this foam fast and easy. Glue the foam down with an expanding urethane glue, or some of the expanding foam that comes in an aerosol can. The different glues can make sanding over seam lines difficult, as they are usually a different density and hardness than the surrounding foam.  
  
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[[Image:9it's hot melt glue.JPG|thumb|center|600px|The glue won't sand properly, so keep it off the areas you will be sanding.]]
 
[[Image:9it's hot melt glue.JPG|thumb|center|600px|The glue won't sand properly, so keep it off the areas you will be sanding.]]
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I knew that one part of the shroud was going to be perfectly round, so I set it up with a bolt in the center and made it so it could be spun by hand against an end mill. This will make it easy to shape the circle, as well as cut the box section down to its proper thickness.
 
I knew that one part of the shroud was going to be perfectly round, so I set it up with a bolt in the center and made it so it could be spun by hand against an end mill. This will make it easy to shape the circle, as well as cut the box section down to its proper thickness.

Revision as of 07:34, 24 June 2007

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