Process and apparatus for lost foam casting with bonded sand core

摘要

In order to prepare for casting a foam mold pattern 10 having a portion 14 into which loose sand will not readily flow when sand is compacted around the foam mold pattern 10, a bonded sand core 16 is attached e.g. by gluing, to the foam mold pattern 10 so that the bonded sand core 16 will occupy only the portion 14 of the foam mold pattern 10 into which sand will not readily flow. The core 16 may include means e.g. a lug 20, for securing it into the sand compacted around the pattern. IMAGE