Making your own apple grindercjoliprsf.ca/Documents/Grinder2011.pdf · Making your own apple...
Transcript of Making your own apple grindercjoliprsf.ca/Documents/Grinder2011.pdf · Making your own apple...
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Making your own apple grinder
by
Claude Jolicoeur
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Making your own apple grinder
• Historic background– Rotating drum grinders– Centrifugal mills
• Design objectives• Details of fabrication• Conclusion
A good grinder is important to increase the yield and speed the pressing of apples into juice. This presentation will give tips and show the procedure to build an efficient grinder.
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Historical background
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Rotating drum grinders
• Most common DIY design.• The drum / wheel is equipped with
teeth and rotates against a plate or stator with a small gap.
• Works by ripping / cutting small pieces of the apples.
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Centrifugal mills
• Common modern commercial design.
• High speed rotating blade and/or hammer smash / cut the apples.
• Holes in a grid control size of pomace.
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Other methods
• Freezer• Food processor with grater disk• Wood beam and bucket (as pestle
and mortar)
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Design objectives
• It should effectively grind apples…. Fast• One person serving the grinder• Easy to clean• Modularity
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Video of what we do not want….
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Details of fabrication
• Mechanical supplies• Rotor, dry laminated wood• Teeth, SS pipe collar• Frame, housings, legs• Finish - varnish, has to cure weeks
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Demonstration video of grinder in action
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ConclusionFor a grinder that works...
• Work on the geometry of rotor / stator - large diameter, convergent geometry.
• Rotor may be dry laminated wood or HDPE plastic if you have a supplier.
• Teeth, agressive, 1/8 high, SS, pipe collar works well, screws not ideal.
• No iron or non-SS steel in contact with juice.• Plan in advance - varnish has to cure weeks.
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Claude Jolicoeur
http://cjoliprsf.awardspace.biz/
Pictures : http://picasaweb.google.com/cjoliprsf