Дисертації: "Bronze lost wax casting"

1

Pickett, Donna M. "Bronze casting by the lost wax method employing mixed media." PDXScholar, 1987. https://pdxscholar.library.pdx.edu/open_access_etds/3465.

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2

Taylor, John A. "The lost wax casting technique." Virtual Press, 1993. http://liblink.bsu.edu/uhtbin/catkey/864921.

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Анотація:

The primary objective of this creative project was to fully explore and analyze the centuries old technique of lost wax casting.The secondary objective was to produce a body of work combining my creative inspirations from nature and my African culture.This body of work employed a variety of traditional metalsmithing techniques combining raised/constructed hollow ware, in a variety of metals, with cast metal forms.
Department of Art

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3

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.

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Dans une démarche pluridisciplinaire, qui emprunte aussi bien aux sciences humaines et sociales (archéologie, histoire des techniques, réexamen des textes anciens) qu’aux sciences chimiques (science des matériaux, métallurgie expérimentale, chimie analytique), cette recherche vise à reconstituer l’évolution des techniques de fonte à la cire perdue, depuis les plus anciens témoignages de son utilisation à Mehrgarh (Pakistan, 5e millénaire av. J.-C.) jusqu’aux premières grandes statues de bronze dans le monde égéen (fin du VIe, début du Ve s. av. J.-C.).L’étude des objets a parfois nécessité des développements analytiques spécifiques pour pallier à leur très forte altération, comme par exemple l’imagerie de photoluminescence synchrotron. Cela a notamment permis de reconstituer en détail la chaîne opératoire de fabrication de la rouelle de Mehrgarh, l’une des plus anciennes fontes à la cire perdue connue à ce jour. Sur la base de ces résultats, il est suggéré que la fonte à la cire perdue pourrait avoir été inventée pour donner la possibilité aux individus non métallurgistes de créer des objets importants en métal tels que ces amulettes, par le biais du façonnage d’un modèle en cire.Nous montrons que la cire perdue a ensuite été mise à profit pour donner naissance à une nouvelle forme de sculpture, la statuaire de métal. Au prix de parois très épaisses et d’assemblages mécaniques, nous mettons en évidence une première période de production de grandes statues en Mésopotamie pendant la deuxième moitié du 3e millénaire av. J.-C. Après un long hiatus, la grande statuaire métallique renaît de façon spectaculaire pendant la première moitié du 1er millénaire av. J. C., à la fois dans les mondes égyptien, sabéen et égéen. Nous identifions deux innovations importantes responsables de cette renaissance : le procédé indirect et l’assemblage soudé.Des essais de coulabilité effectués en faisant varier la composition de l’alliage et le matériau du moule sont présentés dans la dernière partie de notre travail. En moule de plâtre et avec un fort préchauffage, une coulabilité exceptionnelle a été obtenue pour le bronze à fort taux de plomb, donnant pour la première fois une idée des conditions de coulée nécessaires à l’obtention des parois très minces souvent observées sur les grandes statues antiques
Following 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

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4

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.

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Анотація:

This diploma thesis describes the process of production of the cast by the lost-wax casting method. It includes the manufacturing of prototype models by additive technology, creation of ceramic shell molds. The work also includes an experimental part focused on the production of the selected parts by the method of the lost-wax casting and the comparison of this method with other types of production.

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5

Pitses, 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.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.
Cataloged 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.

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6

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.

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Анотація:

This diploma thesis deals with the possibilities of optimization of ceramic shell molds in the method of investment casting. In the first part is mentioned a complete technological process of the method with focusing on production and quality control of the ceramic shell and components, from which it is produced. The experimental part is divided into two parts, in the first are results of laboratory tests, which were tested both the current ceramic shell and shells which have been considered as a possible replacement. In the second section were verified conclusions of the experimental findings and recommendations of the laboratory results in pilot plant conditions.

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7

Bochníček, 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.

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Анотація:

The main topic of the diploma thesis is simulation of the process when wax is filling the cavity of the "mother" metal die.This knowledge is the neccessary presumption for correct design of the gating system and setting correct injection parameters (temperature, pressure, wax flow) when making wax patterns.

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8

Čagánek, 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.

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Анотація:

The diploma thesis deals with the possibilities of using numerical simulation in investment casting technology. The first chapter of practical part deals with the use of simulations in the design of gating system for the shape-complex casting. At the same time, the practical part verified the accuracy of the simulation by test castings on which the X- ray inspection was performed. The results showed that the occurrence of internal defects predicted by simulation corresponded to the locations in the test casts. Next part of the thesis describes improvement of the use of liquid metal (so called “yield”) by numerical simulations. Two specific castings were chosen to perform simulation of current and newly designed variant of the gating system.

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9

Mikulka, 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.

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Анотація:

This diploma theses deals with possibilities of using numerical simulation for optimizing production of highly demanding thin-section casting produced by investment casting process. The casting made of aluminium alloy in which the manufacturing process was very problematic (occurrence of macro and micro shrinkages) has been chosen. By numerical simulation the existing technology has been analysed and based on this the possible reasons for defects found. This was later confirmed also by metallographic examinations. Following to this several options for a new technology were proposed and again by simulation checked their suitability. By comparing all above mentioned options two versions have been chosen in the end which was later tested in production with satisfactory results.

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10

Macko, 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.

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The purpose of this thesis is to assess the current state of production of ceramic shells in MESIT Foundry, a.s. and optimize it. The shells are evaluated in terms of their bending strength, gas permeability and microstructure. Subsequently, castings produced using the shells are evaluated with regard to number of non-conforming products and presence of defects. The final part seeks to compare different shells and outlines a possible new approach to the development of ceramic shells.

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11

Šmíd, 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.

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The main target of this thesis is to choose the suitable hard filled wax for the invest-ment casting foundry Fimes a.s. There are several suppliers of these waxes in the World and in this work waxes of the most reputable suppliers from Europe have been investigated. During these tests there were mainly technological properties of the waxes and also dimensions of both wax patterns and also the final castings measu-red. Suitability of the tested waxes, their technological characteristics, analysis of di-mensions and finally basic economical calculations have been then used in this the-sis as a tool for the recommendation for the most suitable wax for the Fimes foundry.

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12

Blažík, 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.

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The goal of this thesis is to examine a possible influence of the water soluble cores on the microstructure of commonly used aluminum alloys AlSi7Mg and AlSi10Mg in the lost wax technology. This thesis only deals with the changes of the eutecticum on the contact surface between the metal and the core and its surroundings where interactions can appear between the core based on the alkali salts NaCl and KCl and the alloy modified by sodium or strontium. The experimental part investigates the influence of the alkali salts on the modification additives and the modification of the structure itself.

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13

Šmatelka, 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.

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Анотація:

This diploma thesis deals with the problem of wax patterns manufacturing in investment casting technology (lost wax process). This technology is very sensitive to the exact execution in each phase of the whole process, from concept design up to the final casting expedition. During most operations, dimensional changes occur, which is affecting the accuracy of the final casting. No matter how big these changes are, but especially if they occur with the least variance. One of the first phases in this technology is making wax patterns. There are several ways of making the wax patterns and this thesis is describing two different methods used in the Alucast foundry. One is based on using “soft waxes” enabling using low pressure machines, the other one on the “hard waxes” where the injection machine with higher presses is being used (SOM). These two above mentioned technologies are compared in this work.

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14

Schaub, 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.

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Анотація:

While Aluminium has lots of unique properties and is seen as a material of the future, its production and manufacturing has significant environmental impacts. For complex and dimensional shapes casting remains the main manufacturing method and in this study the environmental pressure of different casting techniques is compared. A screening LCA is conducted to determine the environmental impacts of plaster mould castings in a case study at the Ventana Hackås AB foundry in Mid Sweden. The findings are compared to models of sand, pressure die and lost wax castings, based on literature datasets. The most relevant factors for the environmental performance are identified as the production of the aluminium alloy and the amount and source of energy. For plaster mould castings additionally the plaster consumption is significant, while lost wax castings are dominated by the mould production and general processes. Under similar circumstances a relatively similar performance was found for all casting techniques except the lost wax process, which is at least 3 times more emission intensive. Of the remaining techniques pressure die castings performed the best and plaster mould castings the worst, but different sources of uncertainties have been identified in this comparison. In addition a carbon footprint interface is created based on these findings, to enable specific comparisons of different casting method setups. Customizable variables allow the adaptation of three scenarios to real world conditions. As the main influencing factors the aluminium alloy, source of electricity and casting technique have been identified.

2018-10-10

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15

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.

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Анотація:

Diploma thesis is focused to the optimization of the ceramic shell for pouring thin walled aluminium castings by investment casting technology. The main objective is firstly to find the optimal binding system (ceramic slurry) and stucco materials for the shell and secondly its optimal structure and heat treatment (drying of each coat and final shell firing) before metal pouring.

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16

Žuja, 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.

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Анотація:

This thesis is to evaluate currently used wax and compare its properties with of newly purchased one. Further, it is to evaluate whether the quality is reflected by using "boiled wax'', which is being used as a runner wax. All tests were carried out at the Fimes a. s. In the first part of this thesis, there is a brief description of the lost wax method. This is followed by a decription of wax blends from technology point of view. The experimental part describes the operations from the production of wax patterns, through their dimensional inspection, up until dewaxing process. All the results are noted and compared.

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17

Žižka, 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.

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Анотація:

This diploma thesis deals with the optimization of gating systems of shape-complex aluminum castings produced by investment casting process. Two castings whose massive gating systems make problem with the use of liquid metal (so called yield) were chosen for optimization. Each casting is described in its own chapter. The individual subchapters deal with description of the original and newly designed gating system. Simulation, test castings, X-ray inspection and metallographic examination were performed for each variant. At the end of each chapter there is an evaluation of the results of the optimization of gating system.

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18

Úředníček, 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.

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Анотація:

The aim of this paper is to compare a bottom filling of a ceramic form made by lost wax process and a top filling conventional method. A computer simulation of filling and casting solidification will contribute to this comparison. The comparison includes evaluation of readings DAS and characteristic readings of porosity with chosen varieties of casting. The results show that the readings DAS did not change much but characteristic readings of porosity were much better at bottom filling. The computer simulation also showed a certain contribution in the field of model smelting technology.

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19

Talanda, 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.

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Aim of this diploma thesis is to choose new pattern wax for Fimes a.s. foundry. New wax should substitute old not fully satisfactory pattern wax which caused problems in technological process resulting in increased number of rejects. New pattern wax should eliminate current problems and help foundry with producing large, thin-walled, high-quality castings. Numbers of pattern waxes supplied by world’s leading wax manufacturers were subjected to laboratory tests and pilot study. This diploma thesis is part of project Alfa TA01010766: „Research and development of production technology large, thin and high quality castings of aluminium alloys “

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20

Holland, Steven Mark. "Continuing the Copperhead : bronze casting processes and elapid snakes of the Canberra district." Phd thesis, 2015. http://hdl.handle.net/1885/16178.

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This PhD inquiry is a sculptural study of some of the elapid snakes from the districts surrounding Canberra. As a practice-led research it examines the Eastern Brown Snake, the Red-bellied Black Snake, the Death Adder and the Tiger Snake as biological and socially constructed animals through the material of bronze. The project investigates the properties of bronze and the processes of bronze lost wax casting to see if these material agents can somehow reveal the lives of snakes. It resulted in a series of bronze Serpent sculptures which aimed to affirm the life of venomous snakes and create a greater acceptance of their existence. Some of these sculptures were exhibited in different cultural venues including the ACT Herpetological Association exhibition Snakes Alive where they were seen by large audiences. The sculptural inquiry locates elapid snakes from the regions around Canberra in the field of bronze Serpent sculpture within the broader sphere of snakes in Art, Biology and human culture.

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21

Wu, Hong-Ben, and 吳泓彬. "Optimization of Wax Sacrifice for Polymer Lost-Wax Casting." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/45872755244953285703.

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Анотація:

碩士
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.

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22

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.

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Анотація:

碩士
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.

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23

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.

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24

Chen, 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.

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Анотація:

碩士
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.

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25

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.

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Анотація:

碩士
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.

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26

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.

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碩士
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.

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27

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.

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Анотація:

碩士
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.

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28

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.

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碩士
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.

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29

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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This project charts the development of a brand inspired by the symbol of three rabbits with interlocking ears. The process documented in this book details the evolution of the brand, charting its history and the deciphering of its language. The symbol is explored through a collection of artifacts in a variety of media: print, ceramics, glass, and metal. My practice develops a fictional archaeological history which evolves our brand identity. The collection draws from diverse cultural traditions and will inspire our future projects in various fields of interest: organic streetwear, sustainable home décor, and holistic body care products. In addition to producing limited editions of products and publications, and managing our home and forest garden, the creative team at Three Rabbits Farm also provides consulting services for natural building, garden and interior design, as well as food styling and event planning for a range of international clientele.

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Дисертації з теми "Bronze lost wax casting"

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