| 11. | Patterns used in sand casting may be made of wood, metal, plastics or other materials.
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| 12. | Sand casting involves the use of hot molten glass poured directly into a preformed mould.
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| 13. | The gas flow past the rough sand castings could be greatly improved by polishing the passages.
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| 14. | This dry sand casting process results in a more rigid mold better suited to heavier castings.
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| 15. | Sand casting allows for smaller batches than permanent mold casting and at a very reasonable cost.
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| 16. | Full-mold casting is an evaporative-pattern casting process which is a combination of sand casting and lost-foam casting.
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| 17. | It uses an expanded polystyrene foam pattern which is then surrounded by sand, much like sand casting.
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| 18. | Sand casting is one of the earliest forms of casting practiced due to the simplicity of materials involved.
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| 19. | It can be more expensive than die casting or sand casting, but per-unit costs decrease with large volumes.
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| 20. | "' Core plugs "'are used to fill the sand casting core holes found on water-cooled internal combustion engines.
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