Patent ID: 11912851
Assignee: BRASKEM AMERICA, INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC C  B | IPC B  C

Claim 13:
14. The three-dimensional printed article of claim 1, wherein the three-dimensional printed article has a warpage resistance rating of less than 1.5 mm, measured according to the following equation and 48 hours after printing the three-dimensional printed article:
wherein:, warpage
    ⁢
    
      
    
    ⁢
    resistance
    ⁢
    
      
    
    ⁢
    rating
  
  =
  
    
      
        ∑
        
          i
          =
          1
        
        N
      
      ⁢
      
        WS
        i
      
    
    N
  

Σi+1N WSi sums values of WSi, starting at WS1 and ending with WSN,
N is total number of printed articles measured for warpage resistance rating evaluation,
i is an ith printed article measured,
WSi=Max (X1,X2,X3,X4)i−Min (Y1,Y2,Y3,Y4)i for a ith printed article measured,
X1, X2, X3, and X4, respectively, represent a height of a first central edge, a height of a second central edge, a height of a third central edge, and a height of a fourth central edge, of the ith printed article measured,
Y1, Y2, Y3, and Y4, respectively, represent a height of a first corner edge, a height of a second corner edge, a height of a third corner edge, and a height of a fourth corner edge, of the ith printed article measured,
Max (X1,X2,X3,X4)i represents a maximum value of X1, X2, X3, and X4, for the ith printed article measured, and
Min (Y1,Y2,Y3,Y4)i represents a minimum value of Y1, Y2, Y3, and Y4, for the ith printed article measured,

wherein each printed article measured for warpage resistance rating evaluation is a 60 mm×60 mm×60 mm cubic box, each side of the cubic box having a thickness of 1 mm.