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bird_letter_opener [2017/01/04 21:11]
162.233.141.12
bird_letter_opener [2017/01/04 21:24]
162.233.141.12
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 {{ :​bird4.jpg?​400 |First look}}\\ {{ :​bird4.jpg?​400 |First look}}\\
 I think this happened because my sprue wasn't long enough and the aluminum in the resivoir froze before the bird cooled. Then as the bird cooled it was able to shrink and pull away from the mold surface.\\ I think this happened because my sprue wasn't long enough and the aluminum in the resivoir froze before the bird cooled. Then as the bird cooled it was able to shrink and pull away from the mold surface.\\
-But sometimes we carry on and I sanded and dremmeled ​the casting until I got a descent finish. I didnt want to remove too much material so I left some of the pitting in the body. I ground the tail / blade at a slight angle so it looks like the vanes of a feather.\\+But sometimes we are under a deadline like Christmas and we have to carry on. So I sanded and Dremmeled ​the casting until I got a descent finish. I didnt want to remove too much material so I left some of the pitting in the body. I ground the tail / blade at a slight angle so it looks like the vanes of a feather.\\
 {{ :​bird5.jpg?​400 |pic here}}\\ {{ :​bird5.jpg?​400 |pic here}}\\
 {{ :​bird6.jpg?​200 |pic here}}{{ :​bird7.jpg?​200 |pic here}}\\ {{ :​bird6.jpg?​200 |pic here}}{{ :​bird7.jpg?​200 |pic here}}\\
 {{ :​bird8.jpg?​400 |pic here}}\\ {{ :​bird8.jpg?​400 |pic here}}\\
-Over all I am happy with the end result. I am going to experiment with some lost foam casting of the same bird as an alternate method. I'll post those results later.+Over all I am happy with the end result. I am going to experiment with some lost foam casting of the same bird as an alternate method. I'll post those results later.\\ 
 + 
 +=== What I learned === 
 +  * The wax filament is difficult to work with 
 +  * Plaster does not make a reliable mold 
 +  * The wax filament does not melt out as easily as real casting wax 
 +  * Sprue design is very IMPORTANT 
 +  
 +== Many thanks to Bob for his help and guidance. == 
  
  
    
bird_letter_opener.txt · Last modified: 2017/01/04 21:24 by 162.233.141.12