Investment casting (IC) process is one of the oldest and most advanced to manufacture components with excellent surface finish, close dimensional tolerance and complex shape. The property of the final cast part depends upon the property of the wax pattern. The present study investigated the development of wax blend pattern by using various waxes, namely paraffin wax, microcrystalline wax, beeswax, polyethylene wax and carnauba wax. The injection parameters were injection temperature (IT), die temperature (DT), injection flow rate (IFR) and holding time (HT), while output process parameters were surface roughness (SR), needle penetration (NP), linear shrinkage (LS) and volumetric shrinkage (VS). A L₂₇ orthogonal array with grey-fuzzy logic was used to optimize the injection process parameter with multiple output characteristics. The results indicated that the optimized process parameters significantly improved the properties of the wax blend pattern used in the investment casting process.

熔模铸造 (IC) 工艺是制造具有出色表面光洁度、紧密尺寸公差和复杂形状的部件的最古老和最先进的工艺之一。最终铸件的特性取决于蜡型的特性。本研究调查了使用各种蜡，即石蜡、微晶蜡、蜂蜡、聚乙烯蜡和巴西棕榈蜡的蜡混合模式的发展。注射参数为注射温度（IT）、模具温度（DT）、注射流量（IFR）和保持时间（HT），而输出工艺参数为表面粗糙度（SR）、针入度（NP）、线性收缩率（LS） ) 和体积收缩率 (VS)。AL ₂₇具有灰模糊逻辑的正交阵列用于优化具有多输出特性的注射工艺参数。结果表明，优化的工艺参数显着改善了熔模铸造工艺中使用的蜡混合模型的性能。