ABSTRACT

In this work, a hybrid pattern material is introduced for investment casting process to enhance the properties/characteristics of the pattern. The hybrid pattern material is prepared by mixing coconut oil into conventional wax pattern material’s ingredients and named as coconut oil-based hybrid (COBH) pattern material. A comprehensive experimentation was performed to examine the influence of injection parameters viz. injection temperature (IT), injection flow rate (IFR), and die temperature (DT) on COBH pattern characteristics such as surface roughness (SR), average shrinkage (AS), and needle penetration (NP). Regression models were developed and statistically analyzed. Additionally, multi-response optimization (MRO) was carried out using the desirability technique for minimum SR, AS, and NP. The ANOVA results revealed that all input variables significantly influenced the characteristics of the COBH pattern. The optimal parametric settings of IT = 65°C, IFR = 3.5 lpm and DT = 35°C obtained by MRO provided the desired responses (i.e., minimum SR, AS, and NP). The developed COBH pattern ban be utilized for the development of good quality castings.

摘要

在这项工作中，引入了混合图案材料以进行熔模铸造工艺，以增强图案的特性/特征。混合图案材料是通过将椰子油混合到常规蜡图案材料的成分中而制备的，并被称为椰子油基混合（COBH）图案材料。进行了全面的实验以检查注射参数的影响。注射温度（IT），注射流速（IFR）和模具温度（DT）对COBH图案特征的影响，例如表面粗糙度（SR），平均收缩率（AS）和针刺深度（NP）。开发了回归模型并进行了统计分析。另外，使用期望技术对最小SR，AS和NP进行了多响应优化（MRO）。方差分析结果表明，所有输入变量均会显着影响COBH模式的特征。通过MRO获得的IT = 65°C，IFR = 3.5 lpm和DT = 35°C的最佳参数设置可提供所需的响应（即最小的SR，AS和NP）。已开发的COBH模式禁止用于开发高质量的铸件。