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Method for selective deposition modeling

  • US 5,855,836 A
  • Filed: 06/12/1997
  • Issued: 01/05/1999
  • Est. Priority Date: 09/27/1995
  • Status: Expired due to Term
First Claim
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1. A selective deposition modeling method of forming at least a portion of a three-dimensional object on a layer-by-layer basis, comprising the steps of:

  • a) generating computer data corresponding to layers of said object;

    b) providing a building material which is a fluid at at least one temperature between 80°

    C. and about 140°

    C., comprising;

    (i) about 20-80%w of a reactive material;

    (ii) about 10-30%w of a low shrinkage polymer resin;

    (iii) about 5-20%w of at least one microcrystalline wax;

    (iv) about 2-10%w of a toughening polymer; and

    (v) about 1-3%w of a plasticizer;

    c) elevating the temperature of said material to a temperature above 80°

    C. to about 140°

    C.;

    d) selectively dispensing said material at said elevated temperature according to said computer data to form a layer of said object;

    e) providing an environment that lowers the temperature of said dispensed material;

    f) repeating steps d) and e) to form subsequent layers until at least said portion of the object is formed; and

    g) reacting the reactive material included in at least one layer of the object.

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