Relevant bibliographies by topics / Plaster molds

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Plaster molds'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Plaster molds"

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Shumkov, A. A., T. R. Ablyaz, and K. R. Muratov. "Assessing the Surface Distortion of Plaster Molds Made with the Use of SLA Models." Archives of Foundry Engineering 17, no. 3 (September 1, 2017): 123–26. http://dx.doi.org/10.1515/afe-2017-0103.

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Abstract The method of determining the accuracy of polymer molds in plaster forms has been discussed. Distortion of the surface of molds and plaster molds has been assessed. It has been found that the presence of monolithic and porous structure in the samples does not change the accuracy of the surfaces when forms are prepared for removing the material of the model. It has been found that in case of full-mold casting it is more expedient to form the mold cavity with cellular adjustable structures of molding prototypes.
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Tangboriboon, Nuchnapa, Sukritchai Teeraroengrit, Pattara Chawhuaymhak, Jirarat Kamonsawas, Sairung Changkhamchom, and Anuvat Sirivat. "Efficient stoneware hand mold for slip casting in natural rubber latex glove preparation." Progress in Rubber, Plastics and Recycling Technology 36, no. 4 (January 13, 2020): 262–83. http://dx.doi.org/10.1177/1477760619895013.

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Disposal medical gloves are an important product to maintain hygienic conditions, ensuring security for patients and safeguarding against infections. They are used in many fields, such as dental and medical, beauty and cuisine, food and pharmaceutical industries. Presently, aging populations and an emerging middle class in developing countries require medical gloves at a higher volume. Therefore, the demand for medical gloves increases continuously. In this work, two types of hand molds were prepared from stoneware clay and plaster to be used in the natural rubber glove preparation. The ceramic stoneware and plaster hand molds were prepared by the slip casting. The obtained stoneware hand molds were found to be superior to the commercial hand molds. Natural rubber latex (NRL) gloves were fabricated by dipping the stoneware hand mold coated with a coagulant into the NRL compound using the sulfur curing system at 120°C for 30 min. The latex solid:water weight ratio, drying and firing temperatures, and firing time used to prepare stoneware hand molds were found to affect the adsorption–adhesion properties between the mold surface and the NRL films. The obtained NRL films were further characterized for the physical properties such as appearance, film thickness, tackiness, and effusion of the phase formation by X-ray diffraction, the microstructure by scanning electron microscope, and the mechanical properties. The NRL glove films prepared by the stoneware hand mold possessed the high percentage elongation at break and the maximum load stress equal to 1343.30 ± 78.36% and 12.74 ± 2.34 MPa, respectively. On the other hand, the latex glove films prepared by the plaster hand mold with 80 consistency provided the percentage of elongation at break and the maximum load stress equal to 531.76 ± 2.54 and 21.01 ± 0.08 MPa, respectively.
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Parsley, Ronald L. "Latex casting of macroinvertebrate fossils." Paleontological Society Special Publications 4 (1989): 275–81. http://dx.doi.org/10.1017/s2475262200005244.

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Latex casting of macroinvertebrate fossils, when filling natural molds, produces a positive, or cast, reproduction of the organism. The use of latex molds to cast fossils in plaster or plastic materials will be discussed elsewhere in this volume. The purpose of this paper is to describe the preparation of latex casts for study and photography. The procedure for preparing a latex mold is essentially the same. Latex casts, carefully made, reproduce surficial detail with remarkable fidelity and a photograph of a whitened, stained-latex cast is often times indistingushable from a photograph of a well- preserved whitened body fossil.
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Jeong, M. J., Chang Hwan Seo, Yeong Hwan Song, K. J. Kang, and Bo Young Hur. "Effect of Different Upper Side Types of Plaster Molds on the Pore Formation of Al Foams via Upward Foaming Method." Materials Science Forum 569 (January 2008): 269–72. http://dx.doi.org/10.4028/www.scientific.net/msf.569.269.

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Fabrication of Aluminum foam with near net shape has been investigated by powder metallurgy method and conventional pouring method. PM method is good for fabrication of near net shape foam, but it needs high cost compared with pouring method. More cost-effective methods are needed to make near net shape al foam to be applied various field. Therefore, novel method for fabrication Al foam was researched in this paper. In order to prepare near shape Al foams with homogeneous pore structures, the so-called upward foaming method was designed and applied. By using this method, two kinds of molds were designed, one is stainless mold used for melting and foaming Al and another is the plaster mold with near net shape. The fabrication procedures of near net shape Al foam are as following: (1) a quantity of Al ingot was melted in the stainless mold; (2) Ca particles was added in the Al melt to increase its viscosity; (3) TiH2 was introduced in the thickened Al melt to make melt being foamed; (4) the plaster mold was put on the stainless steel one to make enlarging Al melt foam fill with the plaster one; (4) the plaster mold was removed and was cooled. In this study, in order to get near net Al foam with relative good pore structures, the plaster molds were designed with three different upside styles and their effects on the pore structures (pore size, porosity and cell wall thickness) of Al foams were investigated. The results showed that the Al foam had the relative good pore structures when the plaster mold with a void was applied.
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Pastirčák, R., A. Sládek, and E. Kucharčíková. "The Production of Plaster Molds with Patternless Process Technology." Archives of Foundry Engineering 15, no. 2 (June 1, 2015): 91–94. http://dx.doi.org/10.1515/afe-2015-0045.

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Abstract The work deals with technology Patternless process that combines 3 manufacturing process mold by using rapid prototyping technology, conventional sand formation and 3D milling. It's unconventional technology that has been developed to produce large-sized and heavyduty castings weighing up to several tons. It is used mainly in prototype and small batch production, because eliminating production of models. The work deals with the production of blocks for making molds of gypsum and gypsum drying process technology Thermomold. Into blocks, where were made cavities by milling were casted test castings from AlSi10MgMn alloy by gravity casting. At machining of the mold cavity was varied feed rate of tool of cemented carbide. Evaluated was the surface roughness of test castings, that was to 5 micrometers with feed from 900 to 1300 mm/min. The dimensional accuracy of castings was high at feed rate of 1000 and 1500 mm/min did not exceed 0.025 mm.
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Babcock, Loren E. "Casting with plaster of Paris." Paleontological Society Special Publications 4 (1989): 320–25. http://dx.doi.org/10.1017/s2475262200005281.

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Plaster of Paris is a general term for gypsum plasters and gypsum cements. Plaster, which has been in widespread use for producing casts of fossils since the Nineteenth Century (e.g., Green, 1832; Ward, 1866), is easily used for making rigid, long-lasting, and inexpensive casts of study specimens, and for making field casts from natural molds. Good general descriptions of the use of plaster are given in Clarke (1938) and Rich (1947), as well as in many recent books on sculpture (e.g., Miller, 1971; Chaney and Skee, 1973; Andrews, 1983), and in various brochures distributed by manufacturers (e.g., United States Gypsum Company, 1987a, 1987b). Using plaster for casting paleontological specimens was previously discussed in works by Quinn (1940), Keyes (1959), Heintz (1963), Rigby and Clark (1965), Rixon (1976), and Chase (1979).
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Church, Brent W., Daranee Tantbirojn, Thuydung Do, Martha H. Wells, and Antheunis Versluis. "Depth-of-cure of Bulk-fill Composites Cured in Tooth or Opaque Substrate." International Journal of Experimental Dental Science 6, no. 2 (2017): 68–73. http://dx.doi.org/10.5005/jp-journals-10029-1159.

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ABSTRACT Purpose To determine the effect of substrate on the depth-of-cure determination when using hardness profiles in a covered-slot technique and to introduce a new covered-slot method that uses tooth substrates. Materials and methods Three bulk-fill composites and one conventional composite were tested: Tetric EvoCeram Bulk Fill, Venus Bulk Fill, Filtek Bulk Fill Flowable, Filtek Supreme Ultra. The composites were light-cured in rectangular slots (2 mm deep, 2 mm wide) made in a plaster mold or an extracted tooth. The slots were covered with an orange glass plate during curing, leaving one end exposed for light-curing. After curing, the glass plate was removed and the sample was stored in the dark for 24 hours before Vickers hardness was measured as a function of depth at 0.5-mm intervals. Results were analyzed using two-way analysis of variance (ANOVA) and pairwise comparisons (significance level 0.05). Results The hardness of composites cured in covered-slot molds decreased with increasing depth (p < 0.001). Bulk-filled composites cured in plaster molds had a slightly lower depth-of-cure than those cured in natural tooth substrates. Differences between the tooth and plaster substrates were significant at all depths in the “packable” bulk-fill composite (Tetric EvoCeram Bulk Fill), and were significant at ≥2.5 and ≥3.5 mm in the flowable bulk-fill composites (Filtek Bulk Fill Flowable and Venus Bulk Fill) respectively. Conclusion Using natural tooth substrates in the covered-slot method increased the depth-of-cure of bulk-filled composites in comparison to opaque plaster molds. How to cite this article Church BW, Tantbirojn D, Do T, Wells MH, Versluis A. Depth-of-cure of Bulk-fill Composites Cured in Tooth or Opaque Substrate. Int J Experiment Dent Sci 2017;6(2):68-73.
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Gascoigne, H. E. "PLASTER AND WAX MOLDS FOR CASTING PHOTOELASTIC MODELS." Experimental Techniques 11, no. 10 (October 1987): 27–29. http://dx.doi.org/10.1111/j.1747-1567.1987.tb00624.x.

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Márquez, María José Manfredi, Priscila Távara Vidalón, Nuria Lara Hurtado, and Javier Ramos-Ortega. "Comparative Study Between the Different Techniques of Molding and the Morphology of the Foot in Weightbearing." Journal of the American Podiatric Medical Association 108, no. 5 (September 1, 2018): 375–82. http://dx.doi.org/10.7547/17-019.

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Background: Taking a mold of the foot is an important advance for podiatric medicine and an indispensable procedure for the individualization of orthopedic treatments. We sought to determine which method of measuring molds (plaster cast in weightbearing and nonweightbearing and phenolic foam in weightbearing) reproduces with more reliability the expansion of the foot in weightbearing by comparing the widths of the forefoot and hindfoot in the different methods and in barefoot weightbearing. Methods: In 54 patients, we studied the differences in width between the forefoot and hindfoot in barefoot weightbearing compared with in the different mold obtainment techniques. A descriptive, observational, and transversal study was performed in which foot molds were obtained with the different techniques, without corrective maneuvers, followed by scanning of each as well as barefoot weightbearing. Results: Significant differences among the techniques were shown, with phenolic foam being more similar to barefoot weightbearing in forefoot and hindfoot width. Conclusions: The method that reproduces the expansion of the foot in weightbearing with more reliability is phenolic foam. The forefoot width is superior in barefoot weightbearing versus the three foot casts studied. The hindfoot width is superior in the foot cast with plaster in weightbearing compared with barefoot weightbearing and the other two foot casts.
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Lazar, Liliana, and Ion Balasanian. "VALORIZATION OF PLASTER MOLDS WASTE FROM FINE CERAMIC INDUSTRY." Environmental Engineering and Management Journal 9, no. 1 (2009): 141–46. http://dx.doi.org/10.30638/eemj.2010.021.

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Dissertations / Theses on the topic "Plaster molds"

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Těžká, Adéla. "Studium odolnosti povrchových úprav ETICS vůči biotickému napadení." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409773.

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This diploma thesis deals with the study of resistance of ETICS surface treatments to biotic attack. The theoretical part elaborates a research focused on biotic attack of facades of buildings insulated by contact insulation systems ETICS. Based on the information obtained during the elaboration of the bachelor thesis and further study, the optimization methodology of ETICS surface treatment resistance to biotic attack proposed in 2018 is elaborated. In the practical part, the proposed methodology is verified, evaluated and recommendations concerning the suitability of using the proposed methodology in construction practice are implemented.
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Carvalho, Ana Raquel Antunes. "Injecção de polímeros: peças técnicas." Master's thesis, Instituto Politécnico de Bragança, Escola Superior de Tecnologia e de Gestão, 2009. http://hdl.handle.net/10198/2536.

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Conceitos como polímeros, injecção de plástico, moldes, PPAP, (Production Part Approval Process) PPAP, fazem parte do dia-a-dia na Soplast. Um dia-a-dia rodeado de plásticos, um dia-a-dia cada vez mais semelhante ao nosso. Esta nova era de plásticos – tudo à nossa volta tem uma pequena componente plástica – ainda tem muito por descobrir e descodificar. No âmbito da candidatura ao grau de Mestre em Engenharia Química, promovido pela Escola Superior de Tecnologia e de Gestão de Bragança (ESTIG) do Instituto Politécnico de Bragança (IPB) foi realizado um trabalho de acompanhamento do desenvolvimento de uma peça plástica – desde a sua concepção em desenho até à fase final da peça plástica. Estas fases passam pela definição do molde, escolha da matéria-prima, entrega da documentação PPAP (oficial e exigida pela norma ISO TS 16949/2002) entre outros pontos. O estudo para esta tese realizou-se em período de trabalho, na empresa Soplast – Moura, Moutinho e Morais, Lda. Este trabalho pretende acompanhar o processo desde a fase de concepção/desenvolvimento até à fase final de uma peça plástica para a indústria automóvel – peças técnicas. Este documento pode ser considerado um auxílio para novos colaboradores da Soplast que podem aprender o modo de funcionamento da empresa e todos os processos de um novo projecto. Concepts like polymers, plastic injection, mold, PPAP (Production Part Approval Process) made part of all days in Soplast. Days surrounded by plastic, days more and more similar to ours. This new time of plastics - everything around us has a small plastic component - still has plenty to discover and decode. On application to Master degree in Chemical Engineering, sponsored by Escola Superior de Tecnologia e de Gestão de Bragança (ESTIG) from Instituto Politécnico de Bragança this work has been developed - monitoring the development of a plastic part from conception in drawing until the final stage of the plastic part. These phases pass to definition of the model, choice of raw materials, delivery of PPAP documentation (official and required by ISO TS 16949/2002), and others. The study for this thesis took place in working period in company Soplast – Moura, Moutinho e Morais, Lda. This work intends to follow the process from the design/development phase until the end of a plastic part for the automotive industry - technical parts. This document may be considered as aid for new employees that Soplast can have - they can understand how Soplast work in different departments.
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Prince, Leland Fred. "Leland F. Prince's Earth Divers." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2085.

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My stoneware sculptures in my MFA final project were named Earth Divers because clay as a material is earth and clay is also symbolic of the Earth. The way that I physically dive into clay up to my elbows is a poetic performance. The sculptures were built in sections horizontally and then stacked vertically. I began the process by first making life size plaster molds of the human figure taken from live people. Earth Divers take their architectural structure specifically from the organic curves of the negative voids that are characteristic of the plaster figure molds. I built into these plaster molds a block or brick like section. I then removed the large block sections from the molds and stacked the sections one on top of the other combining the figurative and architectural structures with gothic influence. The sculptor, Stephen De Staebler, who works in a similar fashion, describes his work as, "... first laying the figure down and later standing it in a vertical position." The way of life that was lost with the manufacturing past of my family at Castone Brick is found in the use of industrial nostalgia by modeling I-beam shapes as part of the structure of the stacked sections. I also fired nuts, bolts, and washers of various sizes in the clay that build the surface of the human forms. The square nut seen in my work is no longer being manufactured and is symbolic of the passing of the industrial age in America. Finally, to build the surfaces of my sculptures I used slips, glazes, and a variety of clays on top of clay, and laid glass fragments on the horizontal surfaces to create a look of pooled water when my work was fired similar to what I have seen in the Lehman Caves in Baker, Nevada. "I believe there is a force in this world that lives beneath the surface, something primitive and wild that awakens when you need an extra push just to survive, like wild flowers that bloom after a fire turns the forest black. Most people are afraid of it and keep it buried deep inside themselves. But, there will always be a few people who have the courage to love what is untamed inside us." (Tim McGraw)
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Michalčák, Jan. "Výroba součásti z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228395.

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The project elaborated in the frame of engineering studies branch N2307-00 is submitting design of a product from plastic from material PP GF30. In the frame of literal study there are summarized technical knowledge from the area of plastic processing. On its base there is selected and specified technology of plastic injection and costruction of injection mold. Thesis is further dealing with the construction of injection mold, which is solved as a 1+1 multiple with the use of side sliding flank cores. During the course of the tool construction there were used standardized elements of Hasco company. The tool will be fixed by the use of Arburg ALLROUNDER 320C injection press. In the conclusion of the thesis there are verified necessary strenght of the mold and basic production cost analyses.
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Kočí, Ivan. "Návrh technologie výroby zátky z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228882.

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This graduation theses analyse a concept of plastic plug production using the technology of injecting plastic into the form. There is performed a design of the technologic process with necessary calculations included here. Besides that the analysis is also focused on construction of the injection form. For the solution the 3D CAD system by SolidWorks and Hasco, Meusburger, Synventive normals were used. The graduation theses is finally valorized by technological-economic summary.
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Špičák, Pavel. "Technologie výroby součástí z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229768.

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The project developed in terms of engineering study of field N2307- 00 Engineering Technology submits a design of components from plastic production technology- cover on the table. The introductory part of this study describes characteristics, division and possible plastics processing. The work consists of production technology proposal (injection into metal mold) and its construction solution. The another part proposes suitable injection material and verification of injection machine. The final part of work consists of financial evaluation of injection process, appropriate blue prints and appendices.
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Bartlett, Leah Paige. "A Preliminary Study of Using Plastic Molds in Injection Molding." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1509440406290043.

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Václavek, Jiří. "Výroba součásti "KRYTKA"." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230083.

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The theory of plastic injection molding technology together with procedure of designing injection molds is elaborated in this master thesis. Also, the technology of production is designed, derived from assigned component „cover“ analysis affirmed by necessary calculations. On the bases of these calculations, injection machine fitting requirements is chosen. Then injection mold is designed for the assigned component. Simulation of injection is performed for this mold using Autodesk Inventor 2011 and its module Moldflow and then results are thoroughly analyzed. Economical evaluation for this component is then executed towards the end of the thesis.
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Vrátný, Martin. "Návrh technologie výroby závitové koncovky z plastu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318751.

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This diploma thesis submits a proposal of technology design manufacturing threaded plastic ends. In the first part it deals with literary studies of plastics and plastic injection molding. In the second part is the design of an injection form for the specified component. Part of the practical part is also the right choice of material and the injection mold, which was designed based on the calculations of technological parameters. In the conclusion of this thesis is technical economic evaluation.
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Žváček, Michal. "Automatize návrhu jednoduchých vstřikovacích forem pro nástrojárny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228174.

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The dissertation is concerned with automatization proposal of simple injection moulds for plastics. The dissertation is concentrating on the process of CAD design with the aim of make it more effective and automate by the help of 3D parametric strickle board of moulds. It serves for rapid proposal of basic mechanism of the tools. Strickle board of the mould is managed by length of side moulding plate in required range from 300 to the 700mm. For managing of standardized parts was created web portal, which includes database of single parts. These parts can be simply insert to the groups of moulds by the help of hypertext links in software Catia V5. Dissertation includes description of whole system automatization and matching of the new way of CAD design with the original.
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Books on the topic "Plaster molds"

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Clayton, Peirce. The clay lover's guide to making molds: Designing, making, using. Asheville, N.C: Lark Books, 1998.

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Mödlhammer, Elisabeth. Alles gemodelt: Modelabdrücke aus sechs Jahrhunderten. Dettelbach: J.H. Röll, 2003.

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Allyn, Edward P. Mold design I: (plastic injection molds). 2nd ed. Woodstock, NY: Allyn Air Publications, 1988.

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Stanley, Skee, ed. Plaster mold and model making. New York: Prentice Hall Press, 1986.

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Design of plastic moulds and dies. Amsterdam: Elsevier, 1989.

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Bodini, Gianni. Moulding machines and moulds for plastic processing. 2nd ed. Milan: Negri Bossi, 1987.

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Plastic injection molding: Mold design and construction fundamentals. Dearborn, Mich: Society of Manufacturing Engineers, 1998.

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Evans, Jonathan Paul. The filling of plaster block investment moulds by aluminium - 6.5% silicon - magnesium alloy. Birmingham: University of Birmingham, 1997.

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Canada, Society of the Plastics Industry of. Voluntary guidelines, plastic bottle & container material code system-mold modification drawings. [Toronto]: SPI, 1989.

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Kibbel, Howard. Plastic enclosures in portable electronics. Norwalk, CT: Business Communications Co., 1994.

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Book chapters on the topic "Plaster molds"

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Grimzin, Igor, Olga Ponomarenko, Dmitro Marynenko, Nataliia Yevtushenko, and Tatyana Berlizeva. "The Technological Process of Obtaining Sand-Plaster Molds for Complex Thin-Walled Aluminum Castings." In Lecture Notes in Mechanical Engineering, 405–14. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40724-7_41.

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Bruder, Ulf. "Prototype Molds and Mold Filling Analysis." In User's Guide to Plastic, 97–102. München: Carl Hanser Verlag GmbH & Co. KG, 2015. http://dx.doi.org/10.3139/9781569905739.017.

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Bruder, Ulf. "Prototype Molds and Mold Filling Analysis." In User's Guide to Plastic, 145–53. München: Carl Hanser Verlag GmbH & Co. KG, 2019. http://dx.doi.org/10.3139/9781569907351.017.

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Martin-Doñate, Cristina, Sliman Shaikheleid, Abelardo Torres-Alba, and Jorge Manuel Mercado-Colmenero. "A New Smart Web Platform for Plastic Injection Molds in Industry 4.0 Environments." In Lecture Notes in Mechanical Engineering, 309–15. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70566-4_49.

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AbstractThis paper presents a new smart web platform for plastic injection molds for use in industry 4.0 environments. The new platform requires as its only input the CAD model of the plastic part in a discrete format, the accuracy of the analysis, the thermoplastic material of which the part will be manufactured and the number of parts to manufacture per year. Using this information and through a fully automated process based on hybrid algorithms developed by the authors the smart platform generates an extended CAD model of the mold with additional expert information useful for industry 4.0 environments. In this way, it is possible to design a mold with uniform heat transfer, balanced ejection and a uniform filling phase of the mold cavity. The presented platform differ from other applications for mold designing in that the resulting mold meets all the geometric, functional and technological requirements of mold designing without needing CAE simulation software for its validation. The presented platform is considered as the first smart platform that does not require the interaction of the designer in the process of dimensioning and designing the different subsystems that compound the mold, being a tool to reduce time and costs in the initial phases of plastic part design and with the ability to integrate into a flexible manufacturing environment 4.0.
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Rees, Herbert, and Bruce Catoen. "The Plastic Product." In Selecting Injection Molds, 11–48. München: Carl Hanser Verlag GmbH & Co. KG, 2006. http://dx.doi.org/10.3139/9783446413023.002.

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Jeong, M. J., Chang Hwan Seo, Yeong Hwan Song, K. J. Kang, and Bo Young Hur. "Effect of Different Upper Side Types of Plaster Molds on the Pore Formation of Al Foams via Upward Foaming Method." In Eco-Materials Processing and Design IX, 269–72. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/0-87849-472-3.269.

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Parr, James P. "Extrusion Blow Molds." In Plastic Blow Molding Handbook, 489–513. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-6988-2_23.

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Wunderlich, E. Dieter. "Injection Blow Molds." In Plastic Blow Molding Handbook, 515–31. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-6988-2_24.

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Bruder, Ulf. "Structure of Molds." In User's Guide to Plastic, 87–92. München: Carl Hanser Verlag GmbH & Co. KG, 2015. http://dx.doi.org/10.3139/9781569905739.015.

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Bruder, Ulf. "Structure of Molds." In User's Guide to Plastic, 129–38. München: Carl Hanser Verlag GmbH & Co. KG, 2019. http://dx.doi.org/10.3139/9781569907351.015.

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Conference papers on the topic "Plaster molds"

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Tilli, Jacopo, Alessandro Paoli, Armando V. Razionale, and Sandro Barone. "A Novel Methodology for the Creation of Customized Eruption Guidance Appliances." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-47232.

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Within the orthodontic field, malocclusion problems are usually treated by using different types of appliances. In particular, Eruption Guidance Appliances (EGAs) are recommended for early orthodontic treatment or prevention of malocclusion problems. The traditional approach with EGAs is based on the use of standard prefabricated appliances. Experts in the orthodontic field believe that the customization of the EGAs would strongly enhance the results of malocclusion treatments. This paper presents an innovative methodology for the design and manufacturing of fully customized EGAs. The methodology is based on an extensive integration between traditional orthodontic procedures with advanced computer aided design processes. The methodology moves from the digitalization of the plaster models obtained by optical scanning techniques. The patient morphology is then exploited, under dental practitioner supervision, for the design of the appliance geometry through CAD modeling tools. Medical guided assessment is required throughout the most of the data elaboration processes, in order to design the EGAs accordingly to the patient’s clinical conditions. Low-pressure injection molds for the physical manufacturing of the appliances are then 3D printed by using rapid prototyping techniques. The proposed methodology allows the production of patient customized appliances guaranteeing low cost manufacturing and high quality standards, similar to those typically obtained by in series productions. Moreover, the presented approach offers a high integration level with numerical and finite element methods, which can be used for evaluating the stress applied on the EGA, thus allowing the reinforcement of the appliance prior its manufacturing.
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Xu, B., S. Ma, X. Liu, and Z. Chen. "The Experimental Study on Arc Sprayed Mouldmaking for Plastic Products." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p1039.

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Abstract This paper describes some of the problems solved in the development of a mold-making process in which the molds are coated using a 2mm wire arc-spraying system. A water solution release agent has been chosen to meet industry standards and requirements. The composition of backup materials was chosen based on compression strength testing. The material selected has high ultimate compression strength and high thermal conductivity and can be readily incorporated in the mold-making process.
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Salazar-Salgado, Sara, Fanny Valencia, Alejandro Uribe, and Elizabeth Rendón-Vélez. "How Does Physical Activity Affect Residual Limb Volume Change, Comfort and Gait Symmetry on Traumatic Transfemoral Amputees?" In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23418.

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Abstract There is a considerable amount of young adults who become amputees due to war and violence. For this population, a successful adaptation to their prosthesis depends on the socket fit, which in turn is caused by the volume change of the residual limb during the day. The literature reports several investigations on this topic, most of which use subjects walking on a treadmill to simulate their daily activity. However, this studies are focused on transtibial amputees and do not mention the relationship between this physical activity and other variables such as comfort, volume changes and gait. Therefore, the objective of this paper is to determine the effect of physical activity on the volume of the residual limb, the comfort and the symmetry of gait in traumatic transfemoral amputees. Plaster positive molds of the residual limb, the comfort perception and the gait data of five individuals were obtained at the first time of the day and after three sessions of treadmill walking of 15, 30 and 45 minutes. The positive molds of each individual were scanned and then, the volume was calculated. The gait data was acquired using a marker-based motion capture system and processed to obtain spatio-temporal, kinematic and kinetic parameters, including the Gait Deviation Index (GDI). Based on the literature, specific points of the gait data were selected and the symmetry index was obtain for each of them. A short comfort test was used after each session of treadmill walking. Data was analyzed throughout the tests within each subject. Statistical analysis was performed for the volume and the gait variables to check for statistical significance. After physical activity, a tendency towards residual limb volume decrease was found on almost all subjects, although it was not significant. The percentage of volume change obtained on almost all subjects are within the range considered “good socket fit” according to previous authors. Our results suggest that transfemoral amputees may have smaller volume changes than transtibial after treadmill walking. Significant difference was found on the symmetry index of “Swing phase” between the baseline and the 45-minute test. The values of gait symmetry on the gait parameters were consistent with previous findings regarding transfemoral amputees. The difference that arise may be due to the sample difference (cause of amputation, difference in prosthetic elements and use of walking aids). The lowest symmetry was noticed on the ankle kinematics. The comfort did not significantly change with the selected amount of physical activity. In subsequent research, it is recommended to increase the intensity or time of physical activity and/or increase the number of participants. This results can help the understanding of how the socket/residual limb interface behaves which can improve the design and prescription of prosthetic components.
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Urabe, Kiyoshi, and Paul K. Wright. "Parting Direction and Parting Planes for the CAD/CAM of Plastic Injection Molds." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/dfm-4336.

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Abstract We describe a plastic injection mold making agent that is part of a domain unified computer-aided design environment. This environment enables concurrent design of the “to-be-molded” part, by facilitating communication between electrical and mechanical engineering CAD tools. Once the design is completed and certain constraints are satisfied, the design is passed to the mold making agent. After the designer inputs some mold parameters, the mold agent automatically determines the parting direction and parting plane, and generates the mold halves. This is achieved by applying a set of heuristic rules on the part geometry. These rules, design constraints, and methods used to generate the mold are discussed. Resulting mold halves have been fabricated on a 3 axis milling machine using CAD / CAPP / CAM tools described in this paper. Examples of aluminum molds and sample output from the mold making agent are presented.
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Bourque, David. "Manufacturing plastic injection optical molds." In Optical Engineering + Applications, edited by R. John Koshel, G. Groot Gregory, James D. Moore, Jr., and David H. Krevor. SPIE, 2008. http://dx.doi.org/10.1117/12.798467.

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Kosnik, Sabrina, and Davide Piovesan. "Polymeric Reaction Molding of Biocompatible Materials: Lessons Learned." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8465.

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Abstract Polymeric materials are often used as structural binders for biomedical applications. The mechanical properties of the material strongly depend on the fabrication process. To this end, we illustrate a set of casting methods for the production of samples to be tested via destructive methods. The curing process of the artifact was controlled during fabrication, and the molds were also made of polymeric materials. The fabrication of molds is illustrated where particular emphasis is posed on the manufacturing and testing of silicone molds using off-the-shelf material. Cyanoacrylate (CA), Epoxy resin (EP) and Methacrylate ester monomers (MEMs) artifacts have been fabricated using said molds. Of the aforementioned resins, MEMs are a class of thermosetting biocompatible polymers in which fabrication is especially problematic because of the very narrow temperature window at which the monomers polymerize. This research analyzes the casting process of curable materials highlighting the setbacks of using plastic-based molds. Among the cast based manufacturing techniques, specific focus was given to the case where MEMs is made to polymerize in a silicone mold controlling the temperature of the environment. The thermal properties that the silicone-based molds require for the appropriate curing of the polymer are analyzed. It was found that due to the very high heat capacity of silicone, the regulation of the temperature within the mold is difficult often exciding the boiling point of the casted resin.
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Claveria, I., C. Javierre, A. Ferna´ndez, and J. Castany. "Computer Aided System for Semiautomatic Injection Mould Design." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79212.

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Injection molding field has become one of the most important polymer manufacturing areas. One of the elements that plays a very important role in the injection molding process is the mold from which plastic part is obtained. The quality of the final product, depends highly on the proper design of the mold. A software to design injection molds following a design methodology has been developed. It allows the user both, to follow a suitable design itinerary for the mold design including plates, guiding system, ejection system, sliding cores, etc, and to eliminate the repetitive tasks of drawing the different mold elements. The software has been implemented by using PRO/TOOLKIT functions and a Visual C++ environment, and it is supported by PRO/ENGINEER. The usage of the software saves design time at ante project stage and it can be also used as a tool to check the feasibility of the mold according to the part to be manufactured.
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Beheshtian Mesgaran, Saeed, Farzad Elhami Nik, and Seyyed Emad Seyyed Mousavi. "Experimental and Numerical Analysis of Burn Marks and Shrinkage Effect on Injection Molding." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-3009.

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Injection Molding is among the most popular processes in plastic parts production. Through this process, burn marks and shrinkage play the most significant role in decreasing surface quality as well as increasing costs, especially when manufacturers use this method in order to produce thin-walled plastic parts. In this paper, a new strategy to remove the defects caused by shrinkage and burn marks has been proposed for the injection molding process of a specific plastic part which is used to keep the doors of an automobiles open during the painting process. Burn marks caused by the trapped air inside thin walls of the part were first simulated in MOLDFLOW 2010 software. Next step is to compare the simulation results to results that are obtained from experimental analysis. Then, Burn marks and shrinkage effects were eliminated by optimization of the process which includes mold design revision by means of SOLIDWORKS software, modification of the simulation in MOLDFLOW and the mold modification in workshop environment by improvising some ejector pins in certain points. Furthermore, shrinkage amount of the part after cooling process was calculated by applying Finite Element Method (FEM) and obtained results were used to optimize the design of the mold. Results demonstrate that mold design optimization would be possible through designing flawless molds that contain certain points for trapped air discharge and calculating shrinkage amount by FEM for optimization of design procedure. Results consequently decrease costs as well as providing surface quality improvement.
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Kamalrudin, Massila, Sharmini Mohan, Liew Pay Jun, and Rosmiza Wahida Abdullah. "The mold cost estimation calculator for plastic injection mold manufacturing." In 2008 International Symposium on Information Technology. IEEE, 2008. http://dx.doi.org/10.1109/itsim.2008.4631859.

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Vossen, Claudio Alexander, Wagner Luis Pompeo, and Wander J. B. Pereira. "Overview of Automotive Plastic Parts Molds Development of in Brazil." In SAE Brasil 2003 Congress and Exhibit. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2003. http://dx.doi.org/10.4271/2003-01-3565.

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Reports on the topic "Plaster molds"

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Rangineni, Jyothi, and Jeremy Tzeng. Comparison Study of Mold Growth Resistance of Plastic Based Material Flooring (PBM Flooring) and Ceramic Tile Flooring. Clemson University, December 2019. http://dx.doi.org/10.34068/report2.

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Sandblast, Donald. Solid Casting in Aluminum and Concrete Using the Multiple-piece plaster mold: a method of introducing the Adolescent Student to the Indirect Method of Sculpture. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.1612.

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