Purpose

The purpose of present paper is to enlarge the knowledge about the performance of gypsum powder to realize complex molds or cores for aluminum casting.

Design/methodology/approach

The research was divided into two activities: simple; and complex-part production capability. In the simple-part step, the performance of gypsum powder and the minimum mold thickness that would withstand the casting process. In the complex-part step, the authors first investigated the powder removability as a function of geometry complexity and then binder jetting performance was evaluated for the case of lattice-structure fabrication.

Findings

All the geometries tested withstand the casting process demonstrating the benefits in terms of complexity part design; however, the process suffers of all the typical defect of casting as misrun, porosity and cold shut.

Originality/value

The results found in this research improve the benefits related to additive manufacturing application in industrial environment and in particular to the binder jetting technology and the rapid casting approach.

中文翻译：

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使用通过粘合剂喷射生产的石膏模具铸造铝中的复杂结构

目的

本文的目的是扩大有关石膏粉性能的知识，以实现铝铸件的复杂模具或型芯。

设计/方法/方法

研究分为两个活动：简单；和复杂零件的生产能力。在简单零件步骤中，石膏粉的性能和能够承受铸造过程的最小模具厚度。在复杂零件步骤中，作者首先研究了作为几何复杂性函数的粉末可去除性，然后针对晶格结构制造的情况评估了粘合剂喷射性能。

发现

所有测试的几何形状都经受住了铸造过程，证明了复杂零件设计方面的好处；然而，该过程存在铸件的所有典型缺陷，如失流、气孔和冷关。

原创性/价值

本研究中的结果提高了与工业环境中增材制造应用相关的优势，特别是粘合剂喷射技术和快速铸造方法。