本研究在於探討三種蠟，即石蠟(PW)、巴西蠟(CW)、和胺蠟(AW)之特性，以及對於羰基鐵粉╱聚乙烯樹脂(LDPE)系統在射出成型過程中的影響。實驗結果顯示：在混練方面，AW系與CW系之胚體中發現LDPE分子有較明顯的聚集析出的現象。三種蠟系的胚料均屬擬塑性流體；AW或CW系胚料較PW 系，表現的流動性較差、擬塑性較佳。PW系所得的生胚較易產生毛邊。各蠟系在脫脂及燒結後均可得完整表面的胚體，就燒結品的拉伸強度來講，以PW系為最高，其次依序為CW系、AW系。

This research is to study the effect of the characteristics of three wax-es, namely paraffin wax(PW), carnauba wax(CW) and acrawax(AW), on the ijection molding of carbonyl iron powder/low-density polyethylene (LDPE) mixtures. The rasults indicate that some LDPE molecules were found easier to be aggregated and separated in the mixture containing ei-ther AW or CW. The feedstocks of all wax systems show pseudoplastic be-havior. Both AW and CW systems appear to exhibit worse fluidity and better pseudoplasticity than the PW system. Burrs might appear in the g-reen parts of the PW system. The specimens of all wax systems, after de-binding and sintering, show good surface appearance, The PW system ex-phibits the highest tensile strength in the resulting sintered parts, followed by CW and AW systems.

羰基鐵粉;蠟;射出成型

carbonyl iron powder; wax; injection mloding