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Thread: pattern making supplies

  1. #1
    Join Date
    May 2002
    Location
    dayton, oh
    Posts
    89

    Question pattern making supplies

    Where can I find a supplier of pattern making supplies i.e wax fillet material & shrink rules?


    THANKS
    BURNLAST!!!!!!!!!!!!!!!!
    ...the order of bringing about change
    is the four boxes:
    1.soap
    2.ballot
    3.jury
    4.cartridge

  2. #2
    Join Date
    May 2002
    Posts
    256

    Post

    Can't help you with the wax. A Google search for "shrink rule" turned up several sites that look like they sell new ones. There are two for sale on eBay as I write this.

  3. #3
    Join Date
    Jun 2002
    Location
    Ashland City, TN
    Posts
    2,295

  4. #4

  5. #5
    Join Date
    Jan 2002
    Posts
    333

    Post

    What are shrink rules and how do you use them?

    Bob

  6. #6
    Join Date
    May 2002
    Posts
    256

    Post

    Metal shrinks as it cools, so the cavity in a mold has to be larger than the part to be cast. The cavity in the mold is made by packing sand around a patter and then removing the pattern. To avoid having to calculate the pattern dimensions from the desired part dimensions, pattern makers have rules the the appropriate shrinkage factor built in. For instance, if a particular metal shrinks 5%, the inch marks on the corresponding shrink rule will be 1.053" apart. The pattern maker just uses the rule as he would any other rule.


    [This message has been edited by Uncle Dunc (edited 09-17-2002).]

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