نتایج جستجو برای: Lost Foam Casting (LFC)
تعداد نتایج: 103097 فیلتر نتایج به سال:
The effects of gating system and pattern geometry on the metal flow in the lost foam casting (LFC) process have been investigated using glass covered mold and video recording system. Unlike convectional casting process, the type of the gating system showed little effect on fillability in lost foam, but pattern thickness had large effect on mold filling. The mold filling behavior seems to be con...
The mold-filling behavior in the casting of aluminum alloy (A413) using lost foam casting (LFC) was explored. The effects of gate numbers, type of gating and casting thickness on the filling behavior were evaluated. Although, unlike convectional casting process, the gating system showed little effect onfilling ability, casting thickness created a greater effect on the mold filling. In contrast ...
In this investigation a new model was developed to calculate gas pressure at the melt/foam interface (Gap) resulting from foam degradation during mould filling in the Lost Foam Casting (LFC) process. Different aspects of the process, such as foam degradation, gas elimination, transient mass, heat transfer, and permeability of the refractory coating were incorporated into this model. A Computati...
The transport properties of the ceramic based refractory coating to allow proper permeation of degradation products during the pyrolysis of expanded polystyrene (EPS) foam in Lost Foam Casting (LFC) have an important influence on the success of the casting process. This paper proposes a new apparatus to evaluate the permeability of the refractory coatings in a relatively large differential pres...
Currently, many automotive companies struggle with expensive product recalls. To overcome these issues the need for quality management increases. Hence, we propose a monitoring and control framework for Lost Foam Casting (LFC) manufacturing processes using Electrical Capacitance Tomography (ECT) and an evolutionary Genetic Programming (GP) based system. The multi-tier framework simulates the pr...
The effects of gating systems, number of runner, and their locations, in the Lost Foam Casting (LFC) of Aluminum alloy (A.413.0) were investigated. Six different gating systems, with one or two running systems were designed. X-ray radiography and the three axis-bending tests have been employed to evaluate the casting soundness and quality. The results revealed that gating systems have a major e...
The casting process and cooling rate determine the morphology of authentic silicon particles produced in aluminum alloys. slow alloy through Lost Foam Casting (LFC) method a result low mechanical properties. purpose this study was effect added Strontium (Sr) modifier to A356 on microstructure properties LFC method. Aluminum alloys are melted using crucible poured at temperature 730 oC surface p...
Lost-foam (also known as Expendable Pattern Casting, EPC) is an ever-growing metal casting technique, capable of producing complex metal components without parting lines. Mold preparation for lost-foam casting is typically accurate, but expensive and slow. The goal of this research was to develop a new approach for producing rapid lost-foam molds. With this new approach, patterns generated by S...
China has had an unprecedented economic boom within the foundry industry in the past two decades. Lost foam casting technology has gained increasing popularity during this time. In China, about two hundred foundries have lost foam casting operations with total annual casting production of approximately 300,000 tons in 2006. This paper reviews the current lost foam casting industry in China with...
The Lost Foam Casting (LFC) process employs a sacrificial foam replica of the desired casting that is supported by an unbonded sand mold through an overhead raining and flask vibration stage. Generally, the raining and vibration is programmed to a pattern-specific schedule to adequately promote fluidized sand flow into pattern cavities and produce proper densification. Currently, a lengthy tria...
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