Orange Peel

Orange peel presents as a wobbly, yet relatively smooth surface (like a fine sandpaper) that appears on the surface of the casting. This defect indicates that either the casting skin was destroyed by excessive shot blasting or the wax pattern was over-etched, giving it a wobbly surface.

The causes of this defect are evident in the metal and other portions of the process. To cure these causes, R&R recommends taking the following actions.

Area

Cause

Cure

Wax

 

 

Shell

 

 

Metal

  1. Variable depth of oxide formation on casting skin.
  1. Reduce atmosphere, use carbon stucco or can molds.

Other

  1. Excessive shot blasting times.
  1. Avoid excessive shot blasting times (knockout).

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