Q. Define pattern colour code?
The patterns are normally painted with contrasting colours such that the mould maker would be able to understand the functions clearly. The colour code used is
- Red or orange on surfaces not to be finished and left as cast
- Yellow on surfaces to be machined.
- Black on core prints for unmachined openings.
- Yellow stripes on black on core prints for machined openings.
- 5 Green on seats of and for loose pieces and loose core prints.
- Diagonal black stripes with clear varnish on to strengthen the weak patterns or to shorten a casting.