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Dissertations / Theses on the topic 'Gravity die casting'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 March 2023

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1

Elfakharany, Essameldin F. "Qualitative Reasoning for filling pattern in high-pressure die-casting and gravity-driven casting /." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488192447430967.

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2

Samonds, M. T. "Finite element simulation of solidification in sand mould and gravity die castings." Thesis, Swansea University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384446.

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3

Archer, Lucas Andrew. "Development of high-performance cast steel crankshafts." Thesis, University of Iowa, 2016. https://ir.uiowa.edu/etd/2179.

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To produce cast steel crankshafts, risering and gating systems are developed. Filling and solidification simulations of the steel crankshaft rigging are carried out to confirm that the rigging developed will produce a low porosity casting. A sand mold is created with Computer-aided design software, based on the developed crankshaft and rigging. Two prototype crankshafts are cast from the sand molds, and analyzed for porosity. The porosity analysis results are compared directly to the simulated porosity, and found to be in good agreement. From the analysis of the prototype crankshaft, rigging s

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4

VERNET, JUSTINE MARIE. "Out-of-equilibrium behaviour of copper-based alloys in industrial, artistic and historical gravity casting processes." Doctoral thesis, Università degli studi di Genova, 2018. http://hdl.handle.net/11567/929289.

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Copper alloys and casting practices are of major importance in both fields of archaeometry and material sciences. Universally recognized as key technologies in humankind history, they have known a continuous use through times and still are intensively applied in our modern industry. However, a considerable part of the actual knowledge on the non-equilibrium behaviour of ancient copper alloys during casting processes, like bronze and brass, comes from empirical traditions more than from scientific researches. Furthermore, from an archaeological point of view, technological investigations are o

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5

Facchinelli, Nicola. "Microstructural and technological optimisation of magnesium alloys." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3426654.

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Magnesium is one of the most abundance element in nature, and it's characterised by a lower density than aluminium. These characteristics confer great potential to magnesium alloys, which are so used for specialised applications, like for military purposes and in the aerospace industry. While some magnesium alloys, including the AM60B alloy, are historically associated to high pressure die casting, for such applications the magnesium alloy components are usually produced by the gravity casting process, in order to minimise the defect's content and to achieve better castings' mechanical propert

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6

Hamasaiid, Anwar. "Transferts thermiques interfaciaux en fonderie en moules métalliques d'alliages légers." Toulouse 3, 2007. http://www.theses.fr/2007TOU30249.

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L'objectif de ce projet est d'étudier les transferts thermiques interfaciaux pendant la solidification des alliages légers dans les procédés de fonderie par gravité et sous pression. Pour cela, nous avons développé des méthodes expérimentales et des capteurs appropriés permettant d'effectuer les mesures de température dans le moule et en surface de la pièce pendant le remplissage et la solidification. Nous avons également enregistré les paramètres procédés sur une installation de fonderie sous pression particulièrement bien instrumentée. Pour la mesure de température de surface de la pièce cou

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7

Staňková, Markéta. "Hodnocení porezity u odlitků gravitačně litých z Al slitin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228043.

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Solving of this diploma thesis is evaluation porosity in sequence on mechanical properties from different Al alloys. Castings were made by gravity casting to the iron-mould or gravity casting to the sand. Measurements (mechanical properties, porosity, DAS - dendrite arm spacing, shape factors and sphericity) were statistically analysed and dependencies which were detected were processed to the graphs.

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8

yu-hsien, Lin, and 林育賢. "The Manufacturing of Porous Metal for Gravity-Casting." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/81953904871766594157.

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碩士<br>國立高雄應用科技大學<br>模具工程系碩士班<br>94<br>The porous metals are getting used in the molds of plastic injection and die casting for evacuating the air or gas. This work is to study the manufacturing of porous iron materials with parallel pores. A hundred of 0.25~0.26mm diameters of copper wires were first assembled apart each other as a unit of 10mm diameters and put in the hollow tube of diameters of 12mm which have couples of surface holes for gas drawing. The iron powders with binder bubbles extinguisher and dispersant are mixed poured in to the copper wire unit and compacted during drawing the

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9

LIN, GUAN-YI, and 林冠億. "Application of CAE in Aluminum Alloy Tilt Gravity Casting." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/h89y4x.

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碩士<br>逢甲大學<br>機械與電腦輔助工程學系<br>106<br>The objective of this research is to evaluate the effectiveness of gating design and misrun problem caused by back pressure of the A356 aluminum alloy tilt gravity casting vent using the foundry CAE software, ProCAST. The metallographic microstructure and hardness variation of A356 aluminum alloy casting through melt treatment to heat treatment are also evaluated. The simulation result shown that unpressurized gating system with gating ratio of “1:1.7:3.52” has a lower flow speed than “1:1.7:1.13”. Flow speed decreased about 18%. The molten aluminum flow ge

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10

Kuan, Chung-Hao, and 關中皓. "Studies on Squeeze Casting and Gravity Casting in Gas Tungsten Arc Welding of A356 Aluminum Alloy." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/39512267594439091470.

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碩士<br>國立中央大學<br>機械工程學系<br>85<br>A356 aluminum alloy of the squeeze castings and gravity castings were fusion welded with the gas tungsten arc welding process.The effects of gas flow rates,T6 heat treatment, and the type of filler metal were investigated under different welding conditions. The appearance of the welded surface under anodic treatment was also compared and analyzed. It was found that the gas flow rates greatly influenced the weld porosity and the evaporation of low boiling poi

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11

Vaidyanathan, Chandramouli. "A study on the effect of high rotational speeds during centrifugal casting and its comparison to static gravity castings." 1994. http://catalog.hathitrust.org/api/volumes/oclc/31514051.html.

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12

Jaw, L. G., and 趙令健. "Effect of Casting Modulus on the Fluidity of Gravity Cast Al-Si(Mg) Alloys." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/07198698712012915494.

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碩士<br>大葉大學<br>機械工程研究所<br>88<br>The fluidity test of Al-Si(Mg) alloys were conducted at various casting thickness and at different mold temperature using a U-shape permanent mold. The microstructures of the fluidity test castings at different positions were examined to develop the solidification modes of flow cessation for the effects of variables, such as alloy composition (%Si,%Mg) and the minor elements (Ti,Si,P) addition of modification and refinement treatments. It was found that fluidity increases with increasing the mold temperature or the casting thickness. By increasing the

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13

Hung, Yung-Liang, and 洪雍量. "The Value Creation of Gravity Casting Foundry’s Cooperative Strategy to Upper Stream and Down Stream Firms." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/47751627006509394452.

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碩士<br>國立雲林科技大學<br>企業管理系碩士班<br>94<br>The casting industry is the foundation of the mechinery industry, and it involves broadly. In recent years, South East Asia, China and Korea have threating Taiwan seriously with the cheaper labors and facilities. At the same time, the regional protectionism is rising and NAFTA, U.N., ASEAN were found. It is more difficulty in Taiwan to increase export business. Overall, according to the shift in market demand and the dometic invested environment is getting worse. In the situations, the casting industry has to move out. Now, the competitive adventage of Taiwa

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14

Wu, Sheng Jang, and 吳聲讓. "The Study on the Parameter Optimization of the Precision Ornament Gravity Casting of Tin-Alloyed Sheet Metal." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/58719677240600382041.

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碩士<br>華梵大學<br>工業管理學系碩士班<br>92<br>Jewelry makers always adopt the metallic mold investment casting or hand making method to produce adornments. The former method is used to mass production, while the latter is used to make by orders. The silver, tin, copper alloys and even stainless steels are usually used by the metallic mold investment casting method, whereas the gold, silver and copper alloys are frequently used by the handcraft method. The process including designing, drawing and prototype making is always a routine work for a jewelry designer. If the prototype making process can be simplif

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15

Li, Cheng-Lung, and 李正隆. "The Quality Change Of Molten Aluminum Alloy After Flowing Through The Ceramic Foam Filter In Gravity Casting." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/35553263310024679491.

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碩士<br>國立聯合大學<br>材料科學工程學系碩士班<br>101<br>Ceramic foam filter is normally applied in the design of runner system in aluminum gravity casting. The purpose of using this filter is to reduce the velocity of liquid aluminum under the so-called critical gating velocity (e.g., 0.5 m/s for aluminum alloys). After liquid aluminum flows through the foam filter, its static pressure energy is recovered from kinetic energy. The foam filter then can be used for stabilizing the aluminum flow during the filling of mold cavity. The so-called bi-film defect, deriving from the surface turbulence and the entrapment

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16

Hsiung, Yu-Chuan, and 熊玉詮. "Comparison of Computer-aided Simulation Analysis in High Pressure Solidified LFC and Gravity Casting of A356 Aluminum Alloy." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/h6n23w.

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碩士<br>大葉大學<br>機械與自動化工程學系<br>104<br>This study is mainly aimed at the mold flow and solidification computer-aided simulation analyses, which were conducted via the SOLIDCast computer software, on the porosity and shrinkage of A356 aluminum alloy step-type castings. Those castings were made by evaporative pattern casting (EPC). The observations on the porosity at the connection section of various thicknesses of real step-type EPC castings were also compared to the porosity shown on the simulation. The simulation and experimental conditions were classified into two categories, which are separatel

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17

Chirita, Georgel. "Mechanical and fatigue properties of functionally graded aluminium silicon alloys." Doctoral thesis, 2011. http://hdl.handle.net/1822/19650.

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Tese de doutoramento em Engenharia Mecânica (ramo de conhecimento em Mecânica de Materiais)<br>Many structural components encounter service conditions and, hence, required materials performance, which vary with location within the component. It is well known that abrupt transitions in materials composition and properties within a component often result in sharp local concentrations of stress, whether the stress is internal or applied externally. It is also known that these stress concentrations are greatly reduced if the transition from one material to the other is made gradual. By defin

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18

Gonçalves, Gilberto Martins. "Implementação de um sistema de controlo de processo e projeto de coquilha numa empresa de fundição." Master's thesis, 2014. http://hdl.handle.net/1822/28108.

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Dissertação de mestrado integrado em Engenharia Mecânica<br>O presente trabalho enquadra-se no âmbito do Projeto de Dissertação inserido no Mestrado Integrado em Engenharia Mecânica da Universidade do Minho 5 ° Ano. Este projeto teve como principais objetivos, a análise e implementação de sistemas de controlo no processo de fundição e o acompanhamento de projetos de coquilha desenvolvidos na empresa DELABIE, que se dedica à produção de torneiras e válvulas em latão. Este trabalho iniciou-se com, uma revisão bibliográfica sobre temas ligados à tecnologia de fundição, vazamento por gravidade em

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19

Shin-Wei, Wang, and 王昕偉. "The Shrinkage in Aluminum Gravity Castings." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/31260854314203037555.

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碩士<br>國立聯合大學<br>材料科學工程學系碩士班<br>100<br>In Aluminum gravity castings, the shrinkage defect such as micro-porosity is more prominent than that of iron and steel castings. Moreover, the aluminum alloy is one kind of a long freezing range alloy. For a thick aluminum casting, it is easy to observe skin shrinkage so called surface sink. The purpose of this study is to understand the relationship between the micro-porosity and the surface sink in aluminum gravity castings. In this study, three types of castings with various degree of tilting (i.e, T, H, S) were designed by the use of 3D CAD software

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20

Hsu, Fan-Chi, and 許方旗. "Compare of mechanical properties of squeeze castings and gravity castings of A356 alloy." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/70504339922173660741.

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碩士<br>國立中央大學<br>機械工程學系<br>85<br>Gravity casting is a traditional casting which has the characteristicof easily to produce. Squeeze casting is a process which combines thecharacteristics of casting and forging. In squeeze casting, aluminum melt solidified in a state of high pressure so that the castings coulddevelop superior mechanical properties.The purpose of this study was aimed at investigating the influence of the metallurgical variables, included the addition of strontium, siliconand m

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21

Xu, Fang-Qi, and 許方旗. "Compare of mechanical properties of squeeze castings and gravity castings of A356 alloy." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/53994506767696474142.

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