| 摘要 |
An evaporative pattern assembly for use in sand casting and comprising a pattern fabricated from evaporative material and including portions forming a cavity, and a member for preventing distortion of the pattern during aging and during sand compaction around the pattern and in the cavity. The distortion preventing member is fabricated from nonevaporative material, extends between the portions of the pattern, and only partially fills the cavity so that sand can flow around the distortion preventing member.
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