| Description |
viii, 58 leaves : illustrations, photographs ; 29 cm |
| Summary |
"To produce successful castings, processing variables and their effects on mold filling and solidification must be well understood. The effects of processing variables such as metal pouring temperature, pressure head, and gating area are well known for conventional casting methods, such as green sand casting, but they cannot be applied directly to the evaporative pattern casting (EPC) process. Further development of the EPC process depends on an increased knowledge of the complex interactions of these variables and their effects on mold filling and solidification. The mold fill times and solidification of both iron and aluminum castings were recorded by attaching thermocouples to cone-shaped patterns. The metal pouring temperature, pressure head, and gate area were systematically varied to determine their effects on mold fill time and solidification. The filling times were accurately measured using a computer and cooling curves of the castings were recorded on strip charts. The data from each casting were compared to the processing variables and their effects determined. The results show that increasing metal pouring temperature or pressure head decreases the total fill time of the casting, but changing the gate area does not have a significant effect. Solidification of the casting was not affected by the variables, but solidification differed from solidification in conventional castings"--Abstract, leaf iii. |
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