The Influence of Injection Processing on the Shrinkage Variation and Dimensional Stability of Wax Pattern in Investment Casting

Dong Hong Wang; Bo He; Fei Li; Bao De Sun

doi:10.4028/www.scientific.net/AMR.538-541.1217

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 538-541The Influence of Injection Processing on the...

The Influence of Injection Processing on the Shrinkage Variation and Dimensional Stability of Wax Pattern in Investment Casting

Abstract:

The accuracy of the wax patterns used in the investment casting process has a direct bearing on the accuracy of the final cast part. Wax injection process plays a key role in production of nearly net shape wax pattern. Dimension shrinkage is one of the most significant problems of a wax pattern in terms of dimensional stability in the wax injection molding. This study aimed to determine the effects of injection parameters on the dimensional accuracy of the wax patterns. Linear contractions normal to flow direction and weight of wax patterns were measured and dimensional variations were evaluated. The results highlight it is important that when dealing with thick gates, short packing time appears to be the best way to avoid gate area over packing and dimensional variations, high packing pressure appears to increase expansion and dimensional variation of wax pattern.

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Periodical:

Advanced Materials Research (Volumes 538-541)

Pages:

1217-1221

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.538-541.1217

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Online since:

June 2012

Authors:

Dong Hong Wang, Bo He, Fei Li, Bao De Sun

Keywords:

Dimensional Stability, Injection Parameters, Investment Casting, Shrinkage, Wax Pattern

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