Dissertations / Theses on the topic 'Bronze lost wax casting'
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Pickett, Donna M. "Bronze casting by the lost wax method employing mixed media." PDXScholar, 1987. https://pdxscholar.library.pdx.edu/open_access_etds/3465.
Full textTaylor, John A. "The lost wax casting technique." Virtual Press, 1993. http://liblink.bsu.edu/uhtbin/catkey/864921.
Full textDepartment of Art
Mille, Benoit. "D’une amulette en cuivre aux grandes statues de bronze : évolution des techniques de fonte à la cire perdue, de l’Indus à la Méditerranée, du 5e millénaire au 5e siècle av. J.-C." Thesis, Paris 10, 2017. http://www.theses.fr/2017PA100057/document.
Full textFollowing a multidisciplinary approach combining social sciences (archaeology, history of techniques, examination of ancient texts) and chemistry (materials science, experimental metallurgy, analytical chemistry), our research aims to reconstruct the evolution of lost-wax casting techniques, from the earliest evidence of its use in Mehrgarh (Pakistan, 5th millennium BC) to the first large bronze statues in the Aegean (end of the 6th, beginning of the 5th century BC).The archaeological artefacts under study have sometimes required specific analytical developments to overcome their very strong alteration, such as synchrotron photoluminescence imaging. This allowed reconstructing in detail the chaîne opératoire of the Mehrgarh wheel-shaped amulet, one of the oldest lost-wax castings known to date. Based on the results thus obtained, it has been suggested that lost-wax casting might have been invented to give non-metalworkers the opportunity to create important metal objects such as amulets by simply shaping a wax model.We show that lost-wax casting was afterwards used to create a new form of sculpture, namely metal statuary. At the cost of very thick metal walls and mechanical assemblies, this led to an early production step of large statues in Mesopotamia during the second half of the 3rd millennium BC. After a long hiatus, large metal statuary reappeared spectacularly during the first half of the 1st millennium BC, both in the Egyptian, the Sabean and the Aegean areas. We were able to identify two important innovations responsible for this renaissance: the indirect process and the flow fusion welding.Castability tests carried out by varying the composition of the alloy and the material of the mould are presented in the last part of our work. An exceptional castability was obtained for highly-leaded bronze in plaster mould and with a high preheating. For the first time some insights are thus drawn on the casting conditions necessary to obtain the very thin walls often observed on large metal statues during the Classical Antiquity
Bednárik, Marko. "Návrh změny výroby tvářené součásti na technologii lití do keramických skořepin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-445164.
Full textPitses, Eleni Chrisoula. "An assessment of stingless beeswax as a pattern material in ancient Mesoamerican lost-wax casting." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119942.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 43-45).
Metal objects were of great cultural significance in pre-Columbian Mesoamerica. Historical and archaeological evidence prove that these items were made by the process of investment casting, or "lost wax" casting, by which a wax model of the object is created, and a ceramic mold is built around it. The wax is melted out to allow for the pouring of the molten metal. Considerable research has focused on the alloy composition of these objects, and some research has been done on the ceramic molds, but little is known about the composition, source, and manufacture of the wax itself. This paper builds upon work by Michael Tarkanian and Dr. Elizabeth Paris, attempting to fill this gap in the literature. Spanish written accounts of ancient Mesoamerican casting processes mention that wax from stingless bees was mixed with copal, or tree resin, and used to form the models for lost-wax casting. Waxes from Mexican stingless bees Melipona beecheii, Scaptotrigona pectoralis, and Melipona yucatanica were considered in this study, in addition to three copals: Bursera copallifera, Protium copal, and Pinus contorta. Thermal data from Differential Scanning Calorimetry revealed no changes in thermal behavior between waxes and their blends with copals, showing that none of the blends considered in this study are miscible. However, hardness testing revealed that the blends of Pinus contorta with Melipona beecheii and with Melipona yucatanica were harder than their respective waxes. This is in line with a Spanish account of the casting process, which mentions that copal was added so the wax may "[become firm and] harden well". Including data collected by Tarkanian and Paris, the most favorable material for investment casting would be Friesomelitta nigra wax mixed with Bursera copallifera, according to the criteria considered in this study.
by Eleni Chrisoula Pitses.
S.B.
Mazůrek, Tomáš. "Optimalizace skořepinové formy při výrobě odlitků ze slitin Al metodou vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230072.
Full textBochníček, Štěpán. "Validace numerické simulace průběhu plnění matečné formy voskem a její následná optimalizace." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230975.
Full textČagánek, Radim. "Možnosti uplatnění numerických simulací v technologii vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382112.
Full textMikulka, Vít. "Optimalizace technologie výroby Al odlitku litého metodou vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228936.
Full textMacko, Martin. "Vliv použitých surovin na konečnou kvalitu Al odlitků zhotovených technologií vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382187.
Full textŠmíd, Dušan. "Optimalizace technologie vybraných náročných odlitků ze slitin Al." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228725.
Full textBlažík, Petr. "Vodou rozpustná jádra pro hliníkové slitiny a jejich vliv na povrchovou jakost odlitků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231128.
Full textŠmatelka, Jakub. "Optimalizace technologie voskových modelů ve firmě Alucast." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231529.
Full textSchaub, Henning. "Comparison of different aluminium casting processes from an environmental perspective : Case study on plaster mould castings produced in Mid Sweden." Thesis, Mittuniversitetet, Avdelningen för ekoteknik och hållbart byggande, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-35659.
Full text2018-10-10
Soukupová, Lucie. "Optimalizace technologie výroby odlitků ze slitin Al metodou vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230978.
Full textŽuja, Jaroslav. "Optimalizace technologie výroby voskových modelů ve firmě Fimes." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232109.
Full textŽižka, Jiří. "Optimalizace vtokové soustavy s ohledem na využití tekutého kovu při výrobě Al odlitků technologií vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-416634.
Full textÚředníček, Lukáš. "Rozměrová stabilita odlitků ze slitin Al zhotovených metodou vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228150.
Full textTalanda, Ivan. "Optimalizace technologie výroby odlitků ze slitin Al metodou vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230150.
Full textHolland, Steven Mark. "Continuing the Copperhead : bronze casting processes and elapid snakes of the Canberra district." Phd thesis, 2015. http://hdl.handle.net/1885/16178.
Full textWu, Hong-Ben, and 吳泓彬. "Optimization of Wax Sacrifice for Polymer Lost-Wax Casting." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/45872755244953285703.
Full text國立臺灣科技大學
機械工程系
103
The quality of the finished product made by lost wax casting has a great relationship with the properties of wax, because wax has thermal expansion and contraction, so it’s size will shrink and affect the geometry of the original design. Thus, these defects will be directly reflected in the manufacturing process of precision. However they often use the sacrificial material of higher melting point in the metal casting industry. Materials used in polymer lost wax casting are polymer, and dewaxing temperature should not exceed the glass transition temperature. Thus, our dewaxing temperature is lower than the industry, which could cause of residual wax phenomenon. In order to reduce shrinkage, so we have to improve the properties of the wax. This research is focused on using the Taguchi method to mix different types of wax, paraffin wax, Microcrystalline wax, Carnauba wax, soy wax and bee wax. After analysis, the optimized mixture of wax can effectively improve the dimensional stability, but the residual increases slightly because of the addition of nature wax.
Chen, Shih-Lung, and 陳世龍. "Feasibility Analysis of 3D Printing Technology on the Lost-wax Casting." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/u4hvr8.
Full text國立臺北科技大學
製造科技研究所
103
Purpose of this study is 3D printing technology on the lost-wax casting feasibility analysis. The existing problems of traditional lost-wax casting are time-consuming production, high cost and difficult to rework. These problems caused enterprises cost raising and time wasted. With 3D Printing technology in application of lost-wax casting, enterprises can solve production issues and improve design. By applying the material-layered stacking technology, molds can be produced directly or indirectly in a very short time and with a lower cost. There is a wide range of 3D printing technology applications, such as machinery, industrial design, defense, aerospace, architectural models, medical biotechnology, archeology, jewelry, etc. This study investigated how 3D printing technology used in lost-wax casting industry. Through material and technological improvements, enterprises can effectively find a new way to overcome the production issues.
Roque, Tiago Guedes. "Optical Character Recognition of Alphanumeric Codes of Ceramic Bowls used in Lost-wax Casting." Master's thesis, 2019. https://hdl.handle.net/10216/119324.
Full textChen, Yann-jiun, and 陳彥均. "Study on the Fabrication of Three Dimensional Structures in Polymer-Based Microchannels with Lost-Wax Casting." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/66078654487063193950.
Full text國立臺灣科技大學
機械工程系
102
Most microfabrication processes can not efficiently produce true three dimensional features in polymers. Therefore, in this study a new method with lost-wax casting was proposed to fabricate three dimensional microstructures, combining with micromachining and injection molding. The fabrication process utilized paraffin wax as sacrifice and two-component polymers as substrate. Liquid polymers were casting into the obtained wax mold which was processed into desired geometry. After curing, wax was removed by rising temperature to its melting point for dewaxing. The workpieces with microfeatures were produced. However, the melting point of the sacrifice should be lower than the distortion temperature of polymer to assure the dimensional accuracy. To avert undesirable distortion, the dewaxing temperature can not be higher than the glass transition temperature of the polymers. Furthermore, the residual wax on the workpiece may affect the subsequent processes and dimensional accuracy. In this experiment, not only three dimensional microstructure of epoxy but also diffusion micromixer of Polydimethylsiloxane (PDMS) were successfully produced. The stability of the manufacturing processes was proven by the measurement data. Besides, the fluidic testing showed the feasibility of the micromixer. To sum up, the proposed method can generate real three dimensional microstructures and overcome the limitation such as long processing time and high cost in conventional fabrication processes for 3D microstructure. This proposed process is suitable for both the experimental research in laboratory and the mass production in industry for three dimensional polymer-based microchips.
LIN, KAI-FENG, and 林楷峰. "The development of customized finger joint implants by applying 3D printing & lost wax casting technologies." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/53gk33.
Full text國立臺北科技大學
機械工程系機電整合碩士班
107
In recent years, the problems faced by the aging population, especially for those with diseases related to rheumatoid arthritis and bone lesions, have become more and more serious, causing disruption to daily life. Therefore, this study is aimed at discussing and improving finger joint replacement surgery for those suffering from these types of finger related ailments. Today’s finger joint replacements come in a limited variety of standard sizes, from which the most closely matched size is selected and used for the patient’s joint replacement, however this method of selection does not always provide the best match for the size of the patient’s finger. This study has been conducted for the development of customized artificial finger joints, which are designed for each patient to create a dedicated artificial finger joint that will more closely match the needs of each individual patient. These custom finger joints will prove advantageous over the traditional method of limited joint size selection. This study successfully completed the customized artificial finger joint design and used the computerized tomography scan in the hospital to extract the important measurement parameters (length, width, and thickness) of the finger joints of the patient. Then the implementation of the photopolymerization and solidification 3D printing technology was introduced. The wax-like resin model is used to facilitate the investment casting method and the metal material is then cast after dewaxing to complete the customized artificial finger joints. Also, the artificial joint come with hollow design which will fill up with hydroxyapatite (HA) to help the bone growing to the joint. The entire manufacturing process is not using expensive equipment which can easily adapted to the hospital and can be completed within 10 hours. On the other hand, the patient’s replacement surgery can be performed in the next day after their visit. The main advantages of the customized artificial finger joints are a more accurately sized joint that is more in line with the patient’s original finger joint function, and the patient’s subsequent rehabilitation and recovery will be relatively better. This results in the artificial finger joints that are more suitable in fit and function while providing overall better services and choices to the patients.
CHEN, WEI-HONG, and 陳威宏. "CPS Integrates Production Management System for Semi-Automatic Process - A Case Study on Lost Wax Casting Factory." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7nxa6m.
Full text國立高雄科技大學
機械與自動化工程系
107
In the new era of big data leadership, many factories use MES systems to help with process completed. Although the MES system has dealt with many data problems, but it still has some a fly in the ointment and can be improved to achieve better production efficiency and management efficiency. For example, the wax room of the foundry factory, when the wax parts produced by the wax injection machine are transferred to the fix wax process, the information of the process is transmitted through the paper. It does not respond to environmental protection, management is inconvenient, and the information that can be recorded is scarce, and all of them are written by hands. However, this method consumes human resources and time, and the correctness of the data is low, resulting in a decrease in production efficiency and an increase in production costs. There is also a problem of time spent by the staff to report the work. The MES system's reporting equipment is usually embedded in the computer at the designated location, the number of devices is usually small or even one, which makes it necessary for staff to use them at a specified location, and it is easy to encounter situations in which others are operating. If the smart mobile device is used instead, the original multi-to-one reporting mode can be upgraded to many-to-many, which can solve the problem that the personnel need to wait for the work to be queued at the same time, and can also reduce the time spent by the personnel walking. If you have cloud information, you can know the current process items, the work efficiency of the personnel, and increase the management efficiency, thereby increasing the production efficiency. This information can be link up with the various processes of the wax room and continue to be transferred to the next process. Each action leaves a record in the cloud database to know which process is in now of the product and the efficiency of each process. The process efficiency is obtained, which is also equal to get the Cycle Time data required for the production schedule. This research combines action management, technology management, smart transfer technology, and cloud database, and mobile devices to build self-compiled apps to create a bridge between data and cloud database to solve the above problems. Using self-developed smart transfer Technology will transform the real-life logistics that is not easy to be informationized into informationization, and record the data of people, things, time, place and material, and achieve the purpose of quantification, correctness and efficiency of productivity.
FANG, SHENG-KAI, and 方聖凱. "Application of Real-Time Production Management System in Intelligent Manufacturing - A Case Study of Precision Lost Wax Casting Processes." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/x69mcg.
Full text國立高雄科技大學
機械與自動化工程系
107
In the traditional precision dewaxing casting industry, the ERP system is usually used as the information application system, and the ERP system is designed for production planning, financial checkout, procurement and report production. It is impossible to record all the production information in detail by relying on the ERP system to manage the production site, so that the information on the production site cannot be informationized, automated and instant, and the production efficiency cannot be further improved. In order to make the production process informationization, automated and instant, this research develops an instant production management system based on MES concept. The main functions of the system include: WIP, production scheduling, dispatching, production real-time working status and production history information. And through bar code technology to reduce the time and errors spent by operators on inputting data, such as production work orders, personnel numbers, item numbers, etc. In addition, the information is integrated into the cloud database by means of the 5W1H analysis concept with elements such as people, events, time, place, and objects, so that the data is centralized. Finally, the data of the imported and current status are analyzed. The analysis results show that the system helps to record the production details in real time. The system enables enterprises to instantly understand the real-time information of each process on the production line, reduce activities without added value, efficiently master the production process, and improve the delivery accuracy and return of production status.
Yang, Cheng-Yi, and 楊承益. "Using Haptic Technology to Design Computer Assisted Learning Systems for Dental Casting Training – In the Case of melting palladium silver alloy with a dental lost-wax casting blow torch." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/05831028889979806888.
Full text臺北醫學大學
醫學資訊研究所
97
Dental casting is a very important discipline for students of dental technology and dental technicians. Small denture fixtures, e.g. inlays, onlays, crowns, endodontic posts and large denture bases all require the casting technique. In the dental field, lost-wax casting technique is one of the favorite methods to fabricate denture for dental technicians. The lost-wax dental casting process use high temperature to melt metal alloys. The most frequently used instrument in the dental lost-wax casting technique to melt metal alloys for dental technicians is the blow torch (or called blow pipe). However, adjustment of the blow pipe is dangerous and difficult to a certain degree and hence requires repeated practice to do it well. Beginners cannot practice by themselves and need guidance from a teacher. Otherwise it will result in casting failure and cost losses. In a worst scenario, it may also lead to a serious public safety accident. This study uses the computer assisted instruction (CAI) with the visual interface and Wii remote haptic wireless interactive device developed by Nintendo to effectively simulate blow pipe adjustment and establish an assisted casting training environment that is authentic, intuitive, and can effectively monitor the learning process for students to learn spontaneously, cut down the teaching cost, enhance operation safety, and reduce the teacher’s burden.
Albright, Randolph Stewart. "House of the 3 rabbits: an archaeology in reverse, the unpacking of a lost symbol, or daydreaming on the moon rabbit." Master's thesis, 2021. http://hdl.handle.net/10400.8/6358.
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