Parkway-Thixomolding Engineering Data - Tolerances
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Material Data Sheet  .  Comparison  .  Tolerances

TYPICAL TOLERANCES OF MAGNESIUM TXM
1 Thickness Range: in(mm)
Min
Max
  
0.015 (0.38)

0.14(3.56)
** Dependent on part geometry

  
2 Porosity (%)
Min
Max
  
0.0%

1.1%

  
3 Linear Dimensions

- dimensions formed by die features contained in the same die half
Range: in (mm)
  
Min
Max
Tolerance: in(mm)
0.000
1.0(25.4)
+/- 0.0005(0.013)
each addl. inch beyond 1 in.
+/- 0.0010(0.025)
4 Across Parting Line Dimensions

- dimensions formed across the parting line of the two die halves

- based on component projected area
Range: sq. in (sq. cm)
  
Min
Max
Tolerance: in(mm)
0.000
10.0(64.5)
+ 0.0015(.038)
11.0(71.0)
20.0(129.0)
+ 0.0025(0.064)
21.0(135.5)
50.0(322.6)
+ 0.004(.102)
51.0(329.0)
100.0(645.2)
+ 0.006(.152)
5

Flatness

- flatness across the largest dimension of the component
Range: in (mm)
  
Min
Max
Tolerance: in(mm)
0.000
3.0(76.2)
+/- 0.002(.051)
each addl. inch beyond 1 in.
+/- .001(0.025)
6

Moving Die Component Tolerances

- Moving die component tolerances consist of:
  a) Linear Dimension Tolerance (see #3 above)
  b) Moving Component Tolerance

- MDC Tolerance = a + b from above
Range: sq. in (sq. cm)
  
Min
Max
Tolerance: in(mm)
0.000
50.0(322.6)
+ 0.004(.102)
11.0(71.0)
20.0(129.0)
+ 0.006(.152)
21.0(135.5)
50.0(322.6)
+ 0.008(.203)
51.0(329.0)
100.0(645.2)
+ 0.010(.254)
7 Surface Finish

- Surface finish replicates tool finish

- Typical plastic tool polish levels employed

- Expect 16 RMS or better
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