Investigations of the effect of injection parameters on the dimensional accuracy of wax patterns used in ceramic shell investment casting. (2nd August 2010)

• Record Type: Journal Article
• Authors: Singh, Balwinder; Kumar, Pradeep; Mishra, B.K.
• Is Part Of: International journal of manufacturing technology and management. Volume 21:Number 1/2(2010)
• Page Start: 148
• Page End: 159
• Publication Date: 2010-08-02
• Subjects: ceramic shell investment casting -- injection parameters -- DTA -- differential thermal analysis -- dimensional accuracy -- linear contraction -- volumetric contraction -- wax patterns -- temperature -- die temperature -- holding time -- wax shrinkage -- castings -- dimensional variation; Manufacturing processes -- Periodicals; Manufacturing processes -- Automation -- Periodicals; Production management -- Periodicals; 670.427068
• Languages: English
• ISSNs: 1368-2148

Abstract

The present investigation is aimed to determine the effects of injection parameters on the dimensional accuracy of the wax patterns, produced by wax injection machine, to be used in ceramic shell investment casting process. The injection parameters viz. time, temperature, die temperature and holding time were considered. Experiments were performed and optimal parameters were determined. Linear and volumetric contractions of wax patterns were measured and dimensional variations were evaluated. Results reveal that an increase in injection temperature increases wax shrinkage, whereas increase in die temperature reduces the wax shrinkage. Slow injection and short holding time reduces dimensional variation in castings.