Horizont Zeitung für Marketing, Werbung und Medien. 3/9/2017, Issue 10, p20-20. 1p.
Der Autor Felix Heimbrecht ist Director Technology bei Sapient Razorfish und verfügt über eine langjährige Erfahrung im Bereich Produkt- und Service-Innovation. Seine besondere Leidenschaft: Rapid Prototyping. [ABSTRACT FROM AUTHOR]
Three-dimensional (3D) printing provides the flexibility and ease of reproducing the sand mold directly from Computer-Aided Design (CAD) models. This eliminates the laborious pattern making steps, thus reducing total time to casting. The 3D printing provides advantages of minimal processing steps, higher precision and the capability to produce complex shaped sand molds with thin walls. The use of alternative granular media in 3D printing may provide casting advantages such as superior as cast surface finish and tighter dimensional tolerance. The purpose of this study is to characterize post cured 3D printed silica sand specimens with non-standard tests designed to measure the physical, mechanical and thermo-mechanical properties as required for castability. The aim was to evaluate properties and characteristics among six silica sands used in 3D printing. Further, gray iron casting trials were conducted. Results provide information beneficial to qualification of chemically bonded sand molds and casting quality. [ABSTRACT FROM AUTHOR]
Due to the increasing environmental regulations, the need for weight reduction and protection of resources magnesium and aluminum get increasingly into the focus of research and development. Good castability and low density of magnesium alloys lead to an ideal material for lightweight construction in the automotive industry. Furthermore aluminum alloys offerthrough the simply handlingofthe melt, very well castability and the low density of about 2,7 g/cm3 new perspectives in the development of components too [1-3]. To react on the rapid shift in the markets, increasingly complex prototypes must be produced in advance. This article provides an overview of the possible applications of the Light Metal Technologies Ranshofen (LKR). This process offers optimal conditions to use sand molds for rapid prototyping. Magnesium and aluminium are both used within this process. [ABSTRACT FROM AUTHOR]
Development in rapid casting technologies has led to a new era in recent years by the inclusion of various 3D print manufacturing techniques. These techniques provide the flexibility and ease of reproducing a sand mold directly from CAD models, hence eliminating laborious pattern making steps, thus reducing the total time required for prototyping. This study proposes an alternate methodology of developing 3D cured sand molds by introducing a hybrid rapid prototyping approach [1, 3 ,5 ]. Resin coated sand particles can be bonded layer-by-layer after being exposed to a light source, which raises the layer temperatures to a desired range for curing followed by precision machining to obtain complex shapes. Hybrid rapid prototyping techniques [2-6] have been employed in the past, however, the methodology of developing sand molds by integrating light curing with the use of the proposed light curing compatible materials for this process is fairly new. The purpose of this study was to characterize the post cured molding materials with tests designed to measure the physical, mechanical, thermo-mechanical and chemical properties as required for castability. [ABSTRACT FROM AUTHOR]