Literatura académica sobre el tema "Low pressure molding"

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Artículos de revistas sobre el tema "Low pressure molding"

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Zhang, T., and J. R. G. Evans. "The solidification of large sections in ceramic injection molding: Part II. Modulated pressure molding." Journal of Materials Research 8, no. 2 (1993): 345–51. http://dx.doi.org/10.1557/jmr.1993.0345.

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Cylindrical moldings of 20 and 40 mm diameter were injection molded with the application of modulated hold pressure using a well-characterized alumina-polypropylene suspension. The effect of frequency on sprue solidification was explored. For the smaller moldings, very little extension to sprue solidification time was obtained with pressures up to 140 MPa, and this is attributed to the low reciprocating volume flow. For the larger moldings, pressures of 98 MPa were sufficient to produce moldings with neither voids nor cracks, and the sprue solidification time corresponded to the time needed fo
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Li, Jian, Xun Zhang Yu, and Kai Zhang. "Research on the Molding Parameters for Low Pressure Sheet Molding Compounds." Applied Mechanics and Materials 44-47 (December 2010): 2612–16. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2612.

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Molding parameters are significant for compression molding. In this paper, the molding process for low pressure sheet molding compounds thickened by crystalline unsaturated polyester was investigated. The optimal molding parameters such as molding temperature, molding pressure and curing time were determined by orthogonal test. And the effect of molding parameters on flexural strength and surface quality of molded parts were also studied. Results showed that when the molding temperature was 115°C, the pressure adding time was beginning at 15s after LPMC was put into the die cavity, the moving
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Shi, Min Xian, Chuang Dong, Yong Zhang, and Zhi Xiong Huang. "Preparation and Characterization of a Low Density and Low Pressure Sheet Molding Compound." Materials Science Forum 1003 (July 2020): 98–105. http://dx.doi.org/10.4028/www.scientific.net/msf.1003.98.

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Low Density and Low Pressure Sheet Molding Compounds (LD-LPMC) were prepared by using magnesium oxide paste and crystalline polyester as thickening system to reduce molding pressure and Hollow Glass Microspheres (HGM) as fillers to reduce the density. The molding pressure of LD-LPMC was investigated. The effects of HGM content (0%, 3.8%, 7.6%, 11.4%, 15.2%, 19.0%) on the density, flexural strength and thermal conductivity of LD-LPMC were studied. The results showed that 2-4Mpa was the best molding pressure for the composite materials. With the increase of HGM content, the density, flexural str
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Gonçalves, Aparecido Carlos. "Metallic powder injection molding using low pressure." Journal of Materials Processing Technology 118, no. 1-3 (2001): 193–98. http://dx.doi.org/10.1016/s0924-0136(01)00916-5.

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Krindges, Israel, Raquel Andreola, Cláudio A. Perottoni, and Janete E. Zorzi. "Low-Pressure Injection Molding of Ceramic Springs." International Journal of Applied Ceramic Technology 5, no. 3 (2008): 243–48. http://dx.doi.org/10.1111/j.1744-7402.2008.02226.x.

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Shaffer, Peter T. B. "The Advantage of Low Pressure Injection Molding." Materials Technology 8, no. 3-4 (1993): 57–59. http://dx.doi.org/10.1080/10667857.1993.11784939.

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Cao, Ming Li, and Yong Li. "Influences of Molding Pressure on Products Morphology and Carbonated Efficiency of Calcium Hydroxide." Advanced Materials Research 908 (March 2014): 137–40. http://dx.doi.org/10.4028/www.scientific.net/amr.908.137.

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The products and carbonated efficiency were two major aspects on carbonation of waste mineral and the carbonated efficiency and products morphology would make a very big difference under the different molding pressures. The conditions of this study were as follows: water to solid ratio (W/S), CO2 pressure and mass fraction were 0.15, 0.2 MPa and 99.9%,respectively, and the molding pressures were ranged from 0 MPa to 8 MPa. After carbonation, the carbonated efficiency and microstructure were perform with CO2 mass gain degree and SEM, respectively. As the results, low molding pressure was benefi
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Ghanmi, O., and V. Demers. "Molding properties of titanium-based feedstock used in low-pressure powder injection molding." Powder Technology 379 (February 2021): 515–25. http://dx.doi.org/10.1016/j.powtec.2020.10.068.

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Fareh, Fouad, Vincent Demers, Nicole R. Demarquette, Sylvain Turenne, and Orlando Scalzo. "Molding Properties of Inconel 718 Feedstocks Used in Low-Pressure Powder Injection Molding." Advances in Materials Science and Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/7078045.

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The impact of binders and temperature on the rheological properties of feedstocks used in low-pressure powder injection molding was investigated. Experiments were conducted on different feedstock formulations obtained by mixing Inconel 718 powder with wax-based binder systems. The shear rate sensitivity index and the activation energy were used to study the degree of dependence of shear rate and temperature on the viscosity of the feedstocks. The injection performance of feedstocks was then evaluated using an analytical moldability model. The results indicated that the viscosity profiles of fe
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Lv, Xin Ying, Die Ying Ma, Yong Ming Song, and Zhen Hua Gao. "Impacts of Molding Pressure on Performances of Kraft Fiber Reinforced Unsaturated Polyester Composites." Advanced Materials Research 183-185 (January 2011): 2173–77. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.2173.

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Novel Kraft fiber reinforced unsaturated polyester (UPE) composites were prepared at various molding pressures in order to investigate the effects of molding pressure on resin content, the mechanical properties and creep resistance. The results indicated that the novel composites had much higher mechanical properties and better creep resistances than traditional wood plastic composites because of the applications of strong Kraft fibers as reinforcement and thermosetting UPE as matrix. Molding pressure had various effects on the many properties of composites. With molding pressure increased fro
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Tesis sobre el tema "Low pressure molding"

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Andreola, Raquel. "Conformação de molas cerâmicas por moldagem por injeção em baixa pressão." reponame:Repositório Institucional da UCS, 2007. https://repositorio.ucs.br/handle/11338/226.

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Neste trabalho foi estudado o processo de moldagem por injeção em baixa pressão (LPIM do inglês: low-pressure injection molding) de pós cerâmicos submicrométricos para a produção de molas cerâmicas. O trabalho compreende a confecção de moldes e pequenas injetoras de laboratório, extração dos ligantes orgânicos utilizados durante a moldagem, a sinterização das peças e alguns ensaios preliminares para avaliar as propriedades mecânicas de molas cerâmicas. A LPIM apresenta muitas vantagens na produção de peças cerâmicas complexas, quando comparada à moldagem por injeção tradicional. Entretanto LPI
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Hugener, Bruno. "Developing a low pressure blow molding machine for demonstration purposes and production of plastic bottles : a thesis presented in p artial fulfillment of the requirements for the degree of Master of Engineering in Mechatronics at Massey University, Palmerston North, New Zealand." Massey University, 2009. http://hdl.handle.net/10179/1218.

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This thesis presents the research of packaging beer into plastic bottles and the design and manufacture of a low pressure bottle blow moulding machine for demonstration purposes. The machine will be used for the production of plastic bottles suitable for bottling brewed beer at the microbrewery at Massey University Palmerston North. Premanufactured PET preforms have proven to be the most convenient and promising choice for the fabrication of blown bottles. Basic tests to understand the behaviour of the preforms and the challenges of the blowing process have been carried out. A special focus ha
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Barbieri, Rodrigo Antonio. "Influência da temperatura de sinterização nas propriedades mecânicas de molas de alumina injetadas em baixa pressão." reponame:Repositório Institucional da UCS, 2011. https://repositorio.ucs.br/handle/11338/613.

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Neste trabalho foram produzidas molas cerâmicas através do processo de moldagem por injeção em baixa pressão, utilizando-se como matéria-prima alumina submicrométrica, aditivada com ligantes a base de ceras. Dentro do tanque de uma injetora Pelstman, estes materiais foram homogeneizados e resultaram em uma suspensão de baixa viscosidade. Entre os objetivos deste trabalho estão a produção de molas cerâmicas helicoidais com perfil circular, a extração dos ligantes orgânicos utilizados durante a moldagem, a pré-sinterização das molas a 1000°C, o acabamento e a sinterização das molas em diferentes
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Drissi, Mohamed Khalil. "Composants céramiques 3D innovants pour des applications spatiales de télécommunications millimétriques en bandes Q et V." Thesis, Limoges, 2016. http://www.theses.fr/2016LIMO0124/document.

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Ce mémoire est consacré au développement de technologies de filtrage novatrices qui apportent un gain en performance permettant de répondre aux besoins de filtrage pour télécommunications spatiales à moyen et long termes. Il s’inscrit dans le projet ANR ATOMIQ coordonné par Thales Alenia Space ayant comme partenaires le laboratoire SPCTS et la société 3D CERAM. Le premier chapitre est constitué d’une étude bibliographique sur les filtres en bande Q et V ainsi que les technologies de fabrication 3D. Le deuxième chapitre est consacré à l’élaboration d’une nouvelle formulation d’alumine très pure
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Capítulos de libros sobre el tema "Low pressure molding"

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Gooch, Jan W. "Low-Pressure Molding." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_7052.

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Gooch, Jan W. "Low-Pressure Injection Molding." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_7050.

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Shutov, Fjodor A., G. Henrici-Olivé, and S. Olivé. "Injection Molding: Low Pressure Process." In Integral/Structural Polymer Foams. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-02486-7_4.

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Peltsman, I., and M. Peltsman. "Machinery for Hot Molding Ceramic Parts under Low Pressure." In A Collection of Papers Presented at the 1978, 1979, and 1980 Meetings of the Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 1, Issue 9/10. John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470291047.ch41.

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Spratt, M., J. W. Newkirk, and K. Chandrashekhara. "Design and Fabrication of Metal Matrix Syntactic Foams by Low-Pressure Injection Molding." In Proceedings of the 11th International Conference on Porous Metals and Metallic Foams (MetFoam 2019). Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42798-6_9.

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Medvedovski, Eugene, and Michael Peltsman. "Low Pressure Injection Molding of Advanced Ceramic Components with Complex Shapes for Mass Production." In Advanced Processing and Manufacturing Technologies for Structural and Multifunctional Materials VI. John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118217528.ch4.

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"Low-pressure molding." In Encyclopedic Dictionary of Polymers. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_6942.

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"Low-pressure injection molding." In Encyclopedic Dictionary of Polymers. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_6940.

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Brockmann, Carsten, and Walter Michaeli. "Injection Compression Molding. A Low Pressure Process for Manufacturing Textile-Covered Mouldings." In Specialized Molding Techniques. Elsevier, 2001. http://dx.doi.org/10.1016/b978-188420791-4.50027-4.

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Han, Chang Dae. "Compression Molding of Thermoset/Fiber Composites." In Rheology and Processing of Polymeric Materials: Volume 2: Polymer Processing. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780195187830.003.0019.

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Glass-fiber-reinforced thermoset composites have long been used by the plastics industry. Two primary reasons for using glass fibers as reinforcement of thermosets are: (1) to improve the mechanical/physical properties (e.g., tensile modulus, dimensional stability, fatigue endurance, deformation under load, hardness, or abrasion resistance) of the thermosets, and (2) to reduce the cost of production by replacing expensive resins with inexpensive glass fibers. In place of metals, the automotive industry uses glassfiber- reinforced unsaturated polyester composites. One reason for this substitution is that the weight per unit volume of composite materials is quite low compared with that of metals. This has allowed for considerable reductions in the fuel consumption of automobiles. Another reason is that composite materials are less expensive than metals. The unsaturated polyester premix molding compounds in commercial use are supplied as sheet molding compound (SMC), bulk molding compound (BMC), or thick molding compound (TMC) (Bruins 1976; Parkyn et al. 1967). These molding compounds can be molded in standard compression or transfer molds. The basic challenge in molding unsaturated polyester premix compounds is to get a uniform layer of glass reinforcement in place in the die cavity while the resin fills the cavity and reaches its gel stage during cure. Temperature, mold closing speed, pressure, and cure time are all functions of the design of the part being produced. The flow of the mixture through the gate(s) can result in variations in strength across the part due to fiber orientation during the flow. The precise end-use properties depend on the fiber orientation, fiber distribution, and fiber content in the premix compounds, which are greatly influenced by the processing conditions. Since the mechanical properties of the molded articles depend strongly upon the orientation of the glass fibers, it is important to understand how to control fiber orientation during molding. Unsaturated polyester accounts for the greater part of all thermosets used in glass-fiber-reinforced plastics. Glass-fiber-reinforced unsaturated polyesters offer the advantages of a balance of good mechanical, chemical, and electrical properties. Depending upon the application, a number of additives are employed to provide specific products or end-use properties.
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Actas de conferencias sobre el tema "Low pressure molding"

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Jary, Michael W., and Carl H. Visconti. "Low Pressure Insert Molding Processes - Options for Automotive Application." In International Congress & Exposition. SAE International, 1998. http://dx.doi.org/10.4271/980725.

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Fetecau, Catalin, Felicia Stan, Daniel Dobrea, and Dan Catalin Birsan. "Influence of Injection Molding Parameters on Mechanical Properties of Low Density Polyethylene Filled With Multiwalled Carbon Nanotubes." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63591.

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In this paper, we investigated the effect of injection molding parameters such as melt temperature, mold temperature, injection speed and holding pressure on the mechanical properties of low density polyethylene reinforced with 2.5 wt% multi-walled carbon nanotubes. The Taguchi methodology with four factors and two levels was used for the design of the injection molding experiments. The mechanical properties were evaluated by tensile tests in the flow direction at room temperature (23 °C) at crosshead speeds of 1 and 5 mm/min. It was found that the mechanical properties can be modified by mani
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Hung, W. N. P., M. M. Agnihotri, M. Y. Ali, and S. Yuan. "Molding of Three-Dimensional Microcomponents." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21123.

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Traditional micromanufacturing has been developed for semiconductor industry. Selected micro electrical mechanical systems (MEMS) have been successfully developed and implemented in industry. Since current MEMS are designed for manufacture using microelectronics processes, they are limited to two-dimensional profiles and semiconductor based materials. Such shape and material constraints would exclude many applications that require biocompatibility, dynamic stress, and high ductility. New technologies are sought to fabricate three dimensional microcomponents using robust materials for demanding
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Panahi, Ali Keshavarz, Hadi Miyanaji, Moein Taheri, and Milad Janbakhsh. "Fabrication of Supports for Solid Oxide Fuel Cells by Powder Injection Molding." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50199.

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In this paper the processing steps for producing SOFC (Solid Oxide Fuel Cell) supports by means of PIM (Powder Injection Molding) technique were investigated. Injection molding parameters in this study were divided into pressure-related (injection pressure and packing pressure), temperature-related (nozzle temperature and mold temperature), and time-related (injection rate and holding time) parameters. Keeping the other parameters (pressure-related, temperature-related and time-related parameters) constant at an optimized value, the effects of each of the molding parameters above were investig
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Jou, Rong-Yuan. "Numerical Simulations of Filling Flows in Die-Casting Molding of the Thin-Walled LED Heat Sink." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20373.

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In this study, the mold filling analyses of a thin-walled LED heat sink combined with the vacuum valve runner are simulated by FLOW-3D software. Two topics are analyzed and discussed. First, numerical simulations for variety of molding conditions, including effects of thermal conductivity, vacuum pumping pressure, mold temperature, filling velocity, respectively, are conducted for the computational model of the thin-walled LED heat sink connected with the vacuum shut-off valve. Second, effects of several geometrical parameters, including fin thicknesses of the LED heat sink and dimensions of t
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Greenlee, Alison, Timothy Murray, Victor Lesniewski, Mark Jeunnette, and Amos G. Winter. "Design and Testing of a Low-Cost and Low-Maintenance Drip Irrigation Filtration System for Micro-Irrigation in Developing Countries." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35351.

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The cylindrical filters presently used in <1000 m2 drip irrigation systems are frequently clogged, increasing pressure loss and lowering the flow rate through the filters. This work investigates the mechanisms for this clogging and proposes an alternative filtration design that would enable both more reliable and lower maintenance filtering. This proposed system is compatible with existing drip irrigation systems and could be made inexpensively with plastic bottle manufacturing equipment. To compare the proposed design to off-the-shelf options, a drip irrigation test setup was built to meas
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Saigal, Anil, Dan Ward, and Michael A. Zimmerman. "Impact Behavior of Liquid Crystalline Polymers." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-89096.

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Liquid crystalline polymers have the advantage of achieving desirable mechanical properties at a competitive cost. They are composed of molecular chains that are highly oriented and tightly packed at temperatures above and below its melting point. This high degree of orientation has the following advantages: ease of processing, high mechanical strength at extreme temperatures, and resistance to mostly all chemicals, weathering, radiation, and burning. On the other hand, this high degree of orientation causes liquid crystalline polymers to have low impact strength as well as an uneven amount of
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Hashemi, Saeed, and William K. Durfee. "Low Friction, Long-Stroke Rolling Diaphragm Cylinder for Passive Hydraulic Rehabilitation Robots." In 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3518.

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Hydraulic actuators are commonly used in mechanical systems, and actuator efficiency is one of the most important factors in these systems [1]. The energy loss to overcome friction force makes the actuator less efficient. Wearable rehabilitation robotics is one of the applications of hydraulic actuators. Hydraulic cylinders deliver the power extracted from the external resources and/or less stroke-affected limbs to the more stroke-affected limbs (Fig. 1). O-ring seal, rolling diaphragm, and gap seal cylinders are three common technologies that have been used in different hydraulic systems for
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Chen, Shia-Chung, Rean-Der Chien, Song-Wei Huang, and Chun-Sheng Chen. "Effects of Polymer Morphology on the Rheological Behavior of Melt Within Micro-Channels." In ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASMEDC, 2008. http://dx.doi.org/10.1115/mnht2008-52147.

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Micro molding has shown great commercial potential in recent years and determination of the rheological behavior of the polymer melt within micro structured geometry is vital for accurate simulation modeling of micro molding. The lack of commercial equipment is one of main hurdles in the investigation of micro melt rheology. In this study, a melt viscosity measurement system for low and high density polyethylene polymer melt flowing through micro-channels was established using a micro channel mold operated at a mold temperature as high as the melt temperature. For measured pressure drop and vo
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Kida, Junichi, Shigeru Tanaka, Kazuyuki Hokamoto, and Shigeru Itoh. "The Research on Molding Super-Hard Material Powder Using Shock Compaction." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26259.

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Shock compaction techniques have been developed in order to create new advanced materials with improved and unique properties. The problem in industrializing the technique is the formation of cracks due to the propagation of strong shock wave inside the material to be consolidated and a size limitation for recovered compact. Therefore, we developed a modified apparatus to employ cylindrical configuration. The tungsten carbide is used for a lot of tools by the peculiar mechanical properties. A lot of time is needed for the manufacturing though the solid of the super-hard alloy like the tungsten
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