User manual

Appendix I
ZCast Design Guide - 7
WARNING
Inadequate venting in the mold or core can lead to the
unexpected release of entrapped gases and molten metal
causing personal injury during metal casting. Venting paths
in the mold must be arranged and directed away from the
metal path to avoid entrapment of gases.
WARNING
Do not cast molten metal in molds with multiple sections
without using core paste or adhesive. Molten metal can leak
from the mold and cause personal injury.
WARNING
Unshelled molds may not bake thoroughly to remove all
residual moisture. Residual mold moisture after baking
when contacted with molten metal can cause the
unexpected release of molten metal from the mold and
personal injury.
WARNING
Insufficient venting of thick mold sections can result in the
unexpected release of molten metal and personal injury
during metal casting. Design molds with adequate venting
capacity and proper location.
CAUTION
Vents not located in the core, vents too close to parting
lines, or vents that break through to the casting surface may
leak molten metal and cause personal injury. Locate vents
in the core, away from the casting surface, and as far as
possible from parting lines.
CAUTION
Mold wall thicknesses of less than 0.5 inches (13 mm) may
allow molten metal to leak from the mold unexpectedly and
cause personal injury. Design molds to ensure at least 0.5
inches (13 mm) mold wall thickness.
CAUTION
Vents not located in the cope may unexpectedly release
molten metal and cause personal injury.
CAUTION
Parting lines near core vents may leak molten metal into the
vents. The vents may not function properly and cause the
unexpected release of molten metal and personal injury.
CAUTION
Loose powder left in molds may create pockets, voids or
block vents during metal casting resulting in the unexpected
release of molten metal. Ensure that all loose powder is
removed before casting.