聚乙烯醇添加劑對精密鑄造陶殼模性能之影響

Effects of PVA Polymer Additive on the Properties of Ceramic Shell Mold

陳力群(L. Q. Chen) ； 莊勝傑(S. J. Zhuang) ； 楊國和(Ko-Ho Yang)

《鑄造工程學刊》 33卷4期 (2007/12) Pp. 31-36

https://doi.org/10.29809/JTFS.200712.0005

摘要

本研究在製作陶殼模用之面漿與背漿中，以聚乙烯醇(PVA)為添加劑，分別探討其對陶殼模濕態、高溫、殘留破斷強度與透氣度之影響，並與未添加PVA陶殼模作比較。
研究結果顯示：PVA添加劑添加於面漿及背漿時，陶殼模之濕態強度隨著添加量的增加而增加，而高溫強度及殘留強度則隨PVA添加劑添加量的增加而下降。使用高溫透氣度試驗機量測PVA添加劑分別添加於面漿及背漿陶殼模的透氣度，結果發現，添加於面漿時，對整體陶殼模透氣度並無太大的影響；添加於背漿時，則隨添加量的增加，陶殼模透氣度有明顯的改善。

關鍵字

精密鑄造 ； PVA添加劑 ； 陶殼模性能

並列摘要

In this study, PVA polymer was added on the primary and backup slurries to produce the ceramic shell mold. Effects of the PVA polymer additive on the green strength, hot strength, fired strength and permeability of the ceramic shell mold was studied. In addition, the basic properties of the non-PVA polymer added ceramic shell mold were also compared.
Experimental results showed: The green strengths of the ceramic shell mold were increased, both the hot strength and fired strength were decreased, with the addition of the PVA polymer on the primary and backup slurries. As to the high temperature permeability of the ceramic shell mold, no significant effect was found when PVA polymer was added on the primary slurry, but, the permeability was greatly improved when PVA polymer was added on the backup slurry.

並列關鍵字

investment casting ； PVA additive ； ceramic shell mold properties