Journal articles: 'Pressing process'

1

Reardon, Brian J. "Optimizing the Hot Isostatic Pressing Process." Materials and Manufacturing Processes 18, no. 3 (January 8, 2003): 493–508. http://dx.doi.org/10.1081/amp-120022024.

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Hayashi, Masahito, Tatsuya Hasegawa, and Norio Ohiwa. "Numerical Simulation of Glass-Pressing Process." Transactions of the Japan Society of Mechanical Engineers Series B 61, no. 591 (1995): 4157–62. http://dx.doi.org/10.1299/kikaib.61.4157.

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Lv, Li Hua, Gui Bin Liu, and Dan Zhou. "Process and Mechanical Properties of Basalt Fiber/Polylactic Acid Composites." Applied Mechanics and Materials 193-194 (August 2012): 329–32. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.329.

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In this paper, the basalt fiber/polylactic acid composites were prepared by laying-up hot-pressing process, using PLA sheet as the matrix material and basalt fiber fabrics as the reinforced material, besides, the mechanical properties were studied and the parameters of hot-pressing were optimized. PLA mass fraction, heat pressing temperature, heat pressing pressure and heat pressing time were selected as the four main influence factors and tensile strength and bending strength were taken as the test indexes, the best processing conditions: PLA mass fraction 63%, Heat pressing temperature 195 °C, Heat pressing pressure 7MPa, Heat pressing time 10min were optimized through orthogonal experiment and range analysis. The significance of the study was providing theoretical guidance for the further development of high-performance basalt fiber composites.

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Ling, Qi Fei, Xin Gong Li, and Yong Lin Yan. "Study on Hot-Pressing Process of Low-Cost Straw Particle Board." Applied Mechanics and Materials 204-208 (October 2012): 3624–28. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.3624.

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The mixture of isocyanate and urea-formaldehyde adhesive resin was used to manufacture low-cost straw particle board by hot-pressing process. Influence of the hot-pressing temperature, hot-pressing time, board density and the amount of isocyanate adhesive on straw particle board mechanical properties were studied. The resulted showed that, within a certain range, the straw particle board physics performance was improved with the increase of hot-pressing temperature, hot-pressing time, board density and the amount of isocyanate adhesive. The proper hot-pressing process of cost-straw particleboard is hot-pressing time for 40s/mm, MDI applied amount of 3%,a density of 0.7 g/cm3, hot-pressing temperature of 180 °C

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Gun, Evgeny I., Alexander R. Vakhitov, Vitaly V. Salnikov, Igor G. Gun, Jon Ortueta, and Agustin Anitua. "Simulation of the axial joint pressing process." Vestnik of Nosov Magnitogorsk State Technical University 17, no. 1 (March 25, 2019): 46–52. http://dx.doi.org/10.18503/1995-2732-2019-17-1-46-52.

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When designing the axial joint pressing process, a relevant issue is the process parameters which directly influence the nature of the deformation of the housing, and, ultimately, on the formation of an all-in-one connection of a ball stud with a joint housing. These parameters are press force, punch displacement and matrix geometry. The quality of the all-in-one connection depends on a correct selection of the indicated parameters. If the axial joint insert is compressed evenly, the connection will be considered to be the most rational, that is the load will be distributed uniformly over the entire insert surface from the spherical surfaces of the ball stud and the deformed housing. In this way, the press must provide necessary force and displacement; the matrix geometry must provide the required shape of the deformed part of the housing. The all-in-one connection quality is evaluated by a number of operational characteristics of finished products, whose values must be located in intervals acceptable from the customer's point of view. Such characteristics include the following: ball stud rocking resistance torque, breakaway torque at ball stud rocking, axial spring travel and axial stiffness of the joint. In order to determine the specified parameters without many experiments on physical objects, a computer simulation model of the axial joint pressing process based on the finite element method was developed. Required press force, punch displacement and matrix geometry are determined by a computer simulation of the pressing process based on the finite element method. The accomplished experimental research led to the conclusion about acceptable repeatability of the results of the developed mathematical model and experimental data.

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KUROKI, Hironori, Takanori KUROKI, and Yuji YANAGIDA. "Composite processing with hot isostatic pressing process." Journal of the Japan Welding Society 58, no. 6 (1989): 435–40. http://dx.doi.org/10.2207/qjjws1943.58.435.

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7

Bakach, N. G., THEM Labotsky, and Yu L. Salapura. "IMPROVING THE EFFICIENCY OF THE PRESSING PROCESS." Technical and technological aspects of development and testing of new machinery and technologies for agriculture of Ukraine, no. 22(36) (2018): 172–75. http://dx.doi.org/10.31473/2305-5987-2018-1-22(36)-172-175.

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8

Faraji, G., M. Ebrahimi, and A. R. Bushroa. "Ultrasonic assisted tubular channel angular pressing process." Materials Science and Engineering: A 599 (April 2014): 10–15. http://dx.doi.org/10.1016/j.msea.2014.01.069.

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Panasiewicz, Marian, Jacek Mazur, Rafał Nadulski, Paweł Sobczak, Kazimierz Zawiślak, and Zbigniew Kobus. "Assessment of Selected Technical Parameters of Soya Seeds Oil Pressing Process." Agricultural Engineering 21, no. 3 (September 1, 2017): 61–68. http://dx.doi.org/10.1515/agriceng-2017-0025.

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AbstractThe objective of the paper was to determine the impact of the value of the oil pressing pressure with the cold pressing method in a screw press on the pressing course and performance. Varied values of pressure were obtained through the use of three replaceable attachments of the pressing unit with a varied diameter of the outlet conduit (ф1=2 mm, ф2=4 mm and ф3=6 mm). The soya oil pressing process performance was determined in relation to the applied attachment and the soya cultivar. Seeds of 7 Polish non-genetically modified soya cultivars constituted research material. It was proved that both variable pressure values and the used soya cultivars have impact on the pressing performance. Based on the analysis of the obtained research results it was proved that varied technical parameters and soya cultivars influence both the process performance and the remaining parameters and pressing conditions.

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10

Lovkis, Z. V., and A. I. Grigel. "PRESSING AND DRYING PASTA." Food Industry: Science and Technology 14, no. 1(51) (March 11, 2020): 43–49. http://dx.doi.org/10.47612/2073-4794-2021-14-1(51)-43-49.

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The article is devoted to the topic of pasta and such technological processes of their production as kneading pasta dough, pressing or forming pasta, drying finished products. The characteristic features and defining parameters for each of the processes are described. The main parameters that affect the quality of the finished product for the technological process of kneading the dough are humidity, temperature and the process of vacuuming the dough, for the process of forming pasta – pressing pressure and humidity of the dough, for the drying process-temperature, speed and humidity of the drying air. The character of the dough movement in the screw chamber and the pressing head during the molding of pasta is described, the drying process of pasta is considered, the drying curve of pasta is shown.

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11

Stolin, A. M., L. S. Stelmakh, S. V. Karpov, and M. I. Alymov. "External friction in the process of SHS-compaction." Доклады Академии наук 487, no. 6 (September 10, 2019): 636–39. http://dx.doi.org/10.31857/s0869-56524876636-639.

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On the basis of previously developed rheodynamic models of high-temperature SHS‑compaction, a theoretical analysis of the process of backward pressing with the active action of external friction force was carried out. It is shown that in this version of extrusion external friction is a useful technological effect, which allows to obtain a uniform distribution of density over the volume of the pressing material. Analytical relationships have been obtained for calculating the characteristic pressing time and stress distribution.

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Nazari, Farshad, and Mohammad Honarpisheh. "Analytical and experimental investigation of deformation in constrained groove pressing process." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 11 (October 31, 2018): 3751–59. http://dx.doi.org/10.1177/0954406218809738.

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Constrained groove pressing process is a severe plastic deformation method, which can improve the properties of a metal sheet. The purpose of this research is to investigate the effect of deformation behavior and effective strain on the constrained groove pressed sheet properties. For this aim, deformation procedure and effective strain were investigated based on analytical relations and deformation geometry. Formation in the constrained groove pressing process was divided into the bending, stretching, and pressing sections, and the respective contribution of each in the formation procedure was evaluated. Then, the effect of main sections on the formation force, mechanical properties, and microstructure of constrained groove pressed sheets was determined by an experimental study. According to the analytical results, about 41.4% of the formation procedure occurs in the pressing section, creating 70% more effective strain than stretching section. Thus, the pressing section has a significant effect on the properties of constrained groove pressed sheets. The pressing section, due to more effective strain than the stretching section, creates 36% more yield strength, 14.6% more surface hardness, 37.6% more homogeneity and 22.6% smaller grain size. But, compared to the stretching section, the pressing section reduces elongation about 42.8%. So, to produce sheets with high ultimate strength and good formability, using the constrained groove pressing process in the stretching section is more effective.

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13

Ouyang, Ling Jiang, and Jian Zhang. "Finite Element Analysis of Glass Lens Molding Process." Advanced Materials Research 706-708 (June 2013): 1353–56. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.1353.

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Glass lens molding process is a high-volume fabrication method for producing optical components. In this paper, combined with thermal-mechanical coupled analysis and finite element method (FEM) simulation, An axisymmetric model of the GMP is built. Based on this model, FEM on the basis of the commercial FEM software MSC.Marc is conducted to study the pressing process in glass molding. The effects of molding temperature, pressing velocity, and friction on maximum residual stress are calculated. The result shows that the stress decreases at the higher molding temperature, lower pressing velocity and friction.

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14

Feng, Ming Zhi, Rui Long Zhao, Na Lv, and Shuang Bao Zhang. "Constructional Bamboo Plywood Process Control and Production Process." Applied Mechanics and Materials 184-185 (June 2012): 728–31. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.728.

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Focusing on the problems of the bamboo plywood existing in the construction field, we have proposed an optimal process for the building bamboo plywood through controlling the preparation process of the bamboo plywood. In our work, moso bamboo was selected as the objective and then a variety of performances of the bamboo plywood were tested with the heat-up-heat-down process. Experiments show that in the same conditions of MC 10%, RC 7%-8%, the best optimum processes of 12mm thick constructional bamboo plywood is 15min pressing time, the pressing temperature between 155°C to 160°C and the sheet density of 0.85 g/cm3. The optimal process to make the performance of bamboo plywood substantially exceeded the European standard the OSB/4 levels. It can provide practical application of engineering and production design with reference value and theoretical basis for the bamboo plywood.

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15

Goergen, C., D. May, and P. Mitschang. "Integration of rCF in resin transfer pressing process." Journal of Reinforced Plastics and Composites 39, no. 9-10 (February 23, 2020): 361–72. http://dx.doi.org/10.1177/0731684420906879.

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A new composite manufacturing process, resin transfer pressing, is introduced in this paper. In this process, nonwoven fabrics made of recycled carbon fibers are oversaturated with thermoset resin, i.e. they contain excess resin. The oversaturated nonwoven fabrics are prefabricated and used as resin carrier in a press process, where they are placed in a heated mold together with a dry textile-based preform. During pressing, the resin is pressed out and transferred from the nonwoven into the non-impregnated preform and hence impregnates the whole reinforcement. This study examines the oversaturation of nonwoven fabrics, the resin transfer pressing laminate manufacturing and the surface quality of the laminates. The ability of a nonwoven fabric to be oversaturated with resin is defined by the saturation degree, which was determined as up to 12 for glass fiber nonwoven fabrics and up to 60 for recycled carbon fiber nonwoven fabrics. Different laminates are manufactured by resin transfer pressing, and the impregnation quality is evaluated. With an optimized stacking sequence, a pore content <1% was achieved. The use of recycled carbon fiber nonwovens in the resin transfer pressing process leads to a less wavy surface compared to a wet compression molding manufactured laminate, showing a decrease of waviness Wz25 of 11% minimum.

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16

Wang, Ye, Lian Jie Niu, Gang Wang, Hong Yu Xu, Mao Liang Hu, and Ze Sheng Ji. "Improvement of ADC12 Alloy by Optimizing CSP Process Parameters via Multiple Nonlinear Regression Analysis." Materials Science Forum 898 (June 2017): 204–12. http://dx.doi.org/10.4028/www.scientific.net/msf.898.204.

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In order to improve the quality of ADC12 alloy billets prepared by Chips Solid Pressing (CSP) process, the effects of pressing temperature, pressure and packing time on the density of ADC12 alloy billets were investigated by using the orthogonal array and multiple nonlinear regression analysis. The results indicated that the pressing temperature has the greatest effect on the density of the billets, and it is followed by pressing pressure and packing time. The optimized process parameters, including a pressing temperature of 250oC, pressing pressure of 640MPa and packing time of 45 seconds, can be used to obtain the most compact billets of ADC12 alloy prepared by CSP process.

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17

Bergmann, Jana, Hans Dörmann, and Rüdiger Lange. "Interpreting process data of wet pressing process. Part 1: Theoretical approach." Journal of Composite Materials 50, no. 17 (September 15, 2015): 2399–407. http://dx.doi.org/10.1177/0021998315604728.

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18

Guo, Ming Hui, and Jian Peng Hu. "The Fiberboard of Hot Pressing Process Optimization and Combination Performance Characterization." Applied Mechanics and Materials 44-47 (December 2010): 2278–82. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2278.

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To pack a certain quality ratio ammonium lignosulfonate / urea as a filler into the natural wood fiber, Using flat pressure process fiberboard materials, Optimize the hot pressing technique that the filler is 20% (The quality ratio of lignosulfonate/ urea is 5: 3), slab moisture content is 13%, hot-pressing temperature is 190°C; hot-pressing time is 7 minutes, hot-pressing pressure is 2MPa and 1% paraffin emulsion. Verifying test results show that mechanical performance is stable and reliable process. Analyze the reactivity of fiberboard packing, fiber gathered, the microstructure of interface properties with the application of FTIR, XRD and ESEM and other modern instrument analysis technology.

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19

Fukushima, Yoshiaki, Xianping Meng, Kazumichi Yanagisawa, and Nakamichi Yamasaki. "Densification Process of Sepiolite under Hydrothermal Hot-pressing." Journal of the Japan Society of Powder and Powder Metallurgy 40, no. 3 (1993): 355–58. http://dx.doi.org/10.2497/jjspm.40.355.

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20

Babenko, D. V., O. Gorbenko, N. Dotsenko, and N. Kim. "Theoretical aspects of oil separation process by pressing." UKRAINIAN BLACK SEA REGION AGRARIAN SCIENCE 99, no. 3 (2018): 94–98. http://dx.doi.org/10.31521/2313-092x/2018-3(99)-16.

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21

Asai, Satoru, Junichi Shibuya, and Masashi Takahashi. "The Practical Application by Hot Isostatic Pressing Process." Journal of the Japan Welding Society 65, no. 8 (1996): 628–32. http://dx.doi.org/10.2207/qjjws1943.65.8_628.

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22

Fujimoto, Kenjiro, Hiroki Morita, Yuji Goshima, and Shigeru Ito. "High-Pressure Combinatorial Process Integrating Hot Isostatic Pressing." ACS Combinatorial Science 15, no. 12 (November 20, 2013): 622–25. http://dx.doi.org/10.1021/co400029x.

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23

Berezhnoy, V. L. "Non-Traditional Process Techniques of Extrusion and Pressing." International Journal of Advanced Manufacturing Technology 16, no. 1 (January 2000): 19–22. http://dx.doi.org/10.1007/pl00013127.

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24

Wu, Juan, Zhiming Yu, and Tianquan Chen. "Heat-transfer process during hot-pressing of flakeboard." Frontiers of Forestry in China 1, no. 3 (September 2006): 343–47. http://dx.doi.org/10.1007/s11461-006-0007-7.

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25

Naizabekov, A. B., S. N. Lezhnev, T. A. Koinov, and E. A. Panin. "EXPERIMENTAL STUDY ON POWER PARAMETERS OF “ROLLING - ECA-PRESSING” COMBINED PROCESS." Vestnik of Don State Technical University 18, no. 3 (September 29, 2018): 289–99. http://dx.doi.org/10.23947/1992-5980-2018-18-3-289-299.

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Introduction. Power parameters of the “rolling − equalchannel angular pressing” (ECA) combined process are studied. The work objective is to determine forces of rolling and pressing in the deformation by the combined method.Materials and Methods. The die strength calculation and the experiment on deformation of AISI 6063 aluminum samples were carried out. During the experiment, the force values were recorded using a strain-gauge station.Research Results. The strength analysis results show that this die design is suitable for creating an experimental stand of the “rolling − ECA-pressing” combined process, since the calculated safety margin is sufficient to implement the pressing under extreme conditions. The rolling forces at all stages of the deformation exceed the corresponding pressing forces, which is a necessary condition for the combined process. Discussion and Conclusions. The obtained results can be used in the design of experimental stands that implement the investigated combined process. Herewith, the given strain-gauge method for studying strength characteristics is suitable for the case of calibrated rolls.

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Kwapisz, Marcin, Marcin Knapiński, Henryk Dyja, and Konrad Błażej Laber. "Numerical Analysis in the Process of Alternate Pressing and Multiaxial Compression." Materials Science Forum 706-709 (January 2012): 1763–68. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.1763.

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This article presents the results of numeric simulation obtained with commercial software for thermo-mechanical analysis of plastic forging processes, Forge 2009, of the process of alternate forced pressing and multiaxial compression. The new method of alternate forced pressing and multiaxial compression suggested by the authors is characterized by the presence in the plastically forged material of the similar states of deformations to those present in the processes of the equal channel angular pressing and cyclic extrusion compressing. From the performed preliminary tests it can be stated that as a result of combining and repeating two alternate operations: pressing and multiaxial compression, strain accumulation and development of deformation state favorable to grain crushing take place.

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27

Wang, Xing Jian, Hong Peng Li, and Jun Cao. "Modeling of the Hot-Pressing Process in the Production of Particleboard." Applied Mechanics and Materials 288 (February 2013): 246–50. http://dx.doi.org/10.4028/www.scientific.net/amm.288.246.

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Particleboard is a widely used panel material because of its physical properties and low cost, the hot-pressing operation is the one of the most important stages of the whole particleboard production in which many physical processes are involved, such as mat moisture content and distribution, heat transfer. A number of factors are involved including resin type, press temperature, wood species and press closing time, pressure during pressing, Considering coupled heat transfer with resin release ,we presented a mathematical model have been given and solve the modeling with the method of variable separation characteristics and function expansion method. The model has described the relation of center layer temperature changes with pressing times. It is helpful for further research of Internal change in hot-pressing

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28

Lu, Zhao Qing, Qiang Xu, Zhen Wu, and Zhi Jie Wang. "Effect of the Properties of Polyimide Fiber Paper-Based Materials by Different Hot Pressing Process." Advanced Materials Research 631-632 (January 2013): 494–98. http://dx.doi.org/10.4028/www.scientific.net/amr.631-632.494.

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Polyimide fibers and polyamide acid fibers was used as main materials to make polyimide fiber paper. The effect of the properties of polyimide fiber paper by hot pressing temperature and hot pressing pressure was discussed. The experimental results showed that when the pressure of hot pressing was 12Mpa and the hot temperature of hot pressing was 220°C, the sheet had excellent strength properties and electrical performance.

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29

Cao, Chun, Chun Dong Zhu, and Chen Fu. "Numerical Simulation and Process Optimization of Automotive Friction Materials in Warm Pressing Forming." Advanced Materials Research 788 (September 2013): 57–60. http://dx.doi.org/10.4028/www.scientific.net/amr.788.57.

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Warm pressing forming technology has been gradually applied to the forming of automotive friction materials. How to ensure product performance to achieve the target at the same time achieve the maximum energy saving is the research focus of this study. In this paper, by using finite element method, the field of automotive friction materials in warm pressing forming was analyzed, reveals the relationship between the temperature field and the heating temperature/heating time. Furthermore, the energy consumption was analyzed and compared it with hot pressing forming process. The results will have significant guiding to the process optimization in warm pressing forming.

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Wu, Xing Yun, Yan Wen Lu, Hua Zhen Yang, and Yue Feng Tang. "A Novel Method to Fabricate Polymer Porous Membrane by Hot-Pressing Process." Advanced Materials Research 1081 (December 2014): 227–31. http://dx.doi.org/10.4028/www.scientific.net/amr.1081.227.

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A novel method called hot-pressing method of preparing porous membrane was firstly reported in this paper. Compared with other method such as none-solvent induced phase separation method, melt-spinning and cold-stretching method, the hot-pressing method was simple, easy to operate, environment-friendly. First, a silica needle arrays (SNA) template with a hexagonal close-packed structure was prepared by TAFE method. Then the SNA template was used to press into the plastic wrap in order to form the uniform pores. After that, a uniform porous membrane was prepared. The diameter of the porous membrane was affected by the pressure of hot-pressing as well as the hot-pressing temperature.

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Wu, Wei Xiong, Rong Chao Ma, and Nian He Liao. "Process Optimization of Cake Oriented Screw-Pressing of Jatropha curcas." Applied Mechanics and Materials 130-134 (October 2011): 3898–903. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.3898.

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Jatropha curcas from Panzhihua area was used to explore the optimal process of screw-pressing. And the result shows the optimal process parameters are as follows: the water content of kernel is 3%; the ratio of kernel to shell is 8:2; the temperature of the mixture of kernel and shell entering the pressing chamber is 100°C; the temperature of the pressing chamber is 170°C; and the corresponding oil yield is 87.8958%.

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Chang, Yuh Ping, Huann Ming Chou, Gino Wang, and Jin Chi Wang. "An Experimental Study on the Tribological Properties of the Pressing Dies of WC and SKD11 in the High Viscosity Oil." Key Engineering Materials 642 (April 2015): 72–77. http://dx.doi.org/10.4028/www.scientific.net/kem.642.72.

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The poor quality of machining surfaces caused by the surface wear of the pressing dies and the corrosion of the pressing parts has been a major concern for manufacturing engineers. In order to decrease the surface wear of the pressing dies and the corrosion of the pressing parts, the drawing oil is always used during the pressing process. It is well known that the properties and the distributions of the drawing oil significantly influence lubrication, cool down, cleanness and stabilization for the pressing dies and parts. Therefore, it is very important for the operating limitation of the pressing process. This paper is base on the above statements to further investigate the effects of the high viscosity drawing oil on the tribological properties and the adhesions between the dies and parts. The results have not only an added advantage of technology of pressing process, but they are also very helpful in design the pair of the dies and parts in the future. Moreover, the purpose of better quality and faster product speed of the pressing process can then be obtained for the industry.

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Naizabekov, Abdrakhman B., Sergey N. Lezhnev, and Evgeniy Panin. "Experimental Study of Energy Force Parameters of Combined Process "Rolling - ECA-Pressing"." Materials Science Forum 946 (February 2019): 850–55. http://dx.doi.org/10.4028/www.scientific.net/msf.946.850.

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The article is devoted to the study of energy-force parameters of combined process "rolling-equal-channel angular pressing". The objectives of the work were to determine the forces of rolling and pressing in the deformation by this combined method. The strength calculation of the matrix and the experiment on deformation of AISI 6063 aluminum samples were carried out. During the experiment, the force values were recorded using a tensometric station. The results of the strength analysis showed that this matrix design is suitable for creating an experimental stand of combined process "rolling – equal-channel angular pressing", since the calculated safety margin is sufficient to implement the pressing under extreme conditions. Analysis of the results of force measurement showed that rolling forces at all stages of deformation exceed the corresponding pressing forces, which is a necessary condition for the implementation of this combined process. The obtained results can be used in the design of experimental stands that implement investigated combined process. At the same time, the used tensometric technique for studying strength characteristics is suitable for the case of calibrated rolls.

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Shu, Z., E. Monfort, J. Garcia-Ten, J. Zhou, J. L. Amoros, and Y. Wang. "Un nuevo proceso más sostenible para preparar polvo de prensas." Boletín de la Sociedad Española de Cerámica y Vidrio 50, no. 5 (October 30, 2011): 235–44. http://dx.doi.org/10.3989/cyv.312011.

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35

Nadulski, Rafał, Zbigniew Kobus, and Tomasz Guz. "The Influence of Freezing and Thawing on the Yield and Energy Consumption of the Celeriac Juice Pressing Process." Processes 8, no. 3 (March 24, 2020): 378. http://dx.doi.org/10.3390/pr8030378.

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The aim of this study is to indicate the influence of pretreatment, consisting of grinding vegetables and then freezing and thawing the raw material before pressing on the process efficiency and quality of obtained juice. The subject of the research was celeriac root (Apium graveolens L) of the Edward variety. Juice pressing was carried out in a laboratory basket press. The pressing yield and specific energy were values characterizing the pressing process, while pH and the extracted content in the juice were used to assess the juice quality. The experiment was performed according to three procedures. In each of them, the ground celeriac root (pulp or chips) was initially pretreated through freezing and thawing and then pressed twice. Among the examined methods of obtaining juice, the most beneficial method was pressing juice from the pulp, then freezing and thawing the pomace obtained in the first cycle, and finally, pressing the pomace. It is an energy-optimal method and guarantees a high pressing yield as well as obtaining juice with a higher soluble solid content than during the process of pressing chips.

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Fang, Shuang, Mincong Zhang, Qiuying Yu, and Huaping Xiong. "Study on the Influence of the New Type of Powder Metallurgy Ti-Al-Nb Alloy Hot Press Sintering Process on the Microstructure." E3S Web of Conferences 299 (2021): 03010. http://dx.doi.org/10.1051/e3sconf/202129903010.

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Based on the hot-pressing sintering process, the kinetics of hot-pressing sintering crystal grain growth and the hot-pressing sintering densification kinetics, the mixing ratio of the raw material powder and the hot-pressing sintering system are designed. The pressure is maintained at 30 MPa from the temperature rise to the end of the sintering process, and wait until the temperature reaches the corresponding hot pressing sintering temperature (1200°C~1400°C), keep the corresponding time for 1.5h~4.5h, stop heating and depressurize, and the alloy billet is cooled to room temperature with the furnace. The main phases of Ti2AlNb powder and hot pressing sintering process are TiAl and Ti3Al.

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Monteiro, Sandra, Jorge Martins, Fernão D. Magalhães, and Luísa Carvalho. "Low Density Wood Particleboards Bonded with Starch Foam—Study of Production Process Conditions." Materials 12, no. 12 (June 19, 2019): 1975. http://dx.doi.org/10.3390/ma12121975.

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It has been shown that wood particleboards bonded with sour cassava starch can display low density combined with good physico-mechanical performance, thanks to starch being able to produce a strong foam that fills the interparticular space. Here we optimize the pressing conditions for the production of these panels. The procedure involved hot-plate pressing in two stages: (1) lowering the top platen to a specified thickness for a duration designated as pressing time, followed by (2) raising the top platen to allow panel expansion for a duration designated as hold time. The parameters studied were the pressing time (10 to 150 s), the hold time (290 to 890 s), and the top platen temperature (80 to 190 °C). The hold time and pressing time showed to be crucial parameters. The best operating conditions corresponded to 600 s of press cycle time, comprising 60 s of pressing time and 540 s of hold time. The top platen temperature used was 190 °C. The particleboards produced had a density of 405 kg·m−3, an internal bond strength of 0.44 N·mm−2, and a thickness swelling of 13.2%. This can be considered as very good performance, taking into account the panels’ low density.

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Chen, Chao, Yong Ling Yu, Li Hua Lv, and Jing Cui. "Process Optimization and Performance Analysis of the Decorative Composites Prepared by Silk Fabric / PE Film." Advanced Materials Research 175-176 (January 2011): 323–27. http://dx.doi.org/10.4028/www.scientific.net/amr.175-176.323.

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The decorative composites composed of silk fabric/PE film were characterized by easy cleanness, corrosion-resistance, anti-oxidation and other virtues. In this paper, silk fabric/PE film decorative composites were prepared by hot pressing method. The optimum thickness of the silk fabrics and PE film was fixed by color difference analysis. The effects of hot-pressing temperature, hot-pressing pressure, and hot-pressing time on mechanical properties were studied through single factor analysis method at a certain thickness. The results showed that under the hot pressing conditions (temperature145 °C, pressure 3 MPa, time 4 min and thickness 0.3 mm), silk fabric/PE film decorative composites with ideal tensile strength, bursting strength, tearing strength and color vividness could be obtained. This paper provided an effective approach to the comprehensive utilization of silk fabrics for preparation of decorative composites.

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Wang, Wei Hui, Guang Zhong Hu, and Min Zhou. "Refined Cotton Centrifugal Dewatering Process and Key Technology." Advanced Materials Research 179-180 (January 2011): 1124–29. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.1124.

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At home and abroad the process of refined cotton mainly used pressing for washing and dehydration. The refined cotton with high water content, drying energy consumption is high. In this paper, base on the application of centrifugal dewatering process nitrocellulose, combined the characteristics of refining cotton with centrifugal dewatering process principles, the key technology of overflow limit and Pusher resistance were analyzed and discussed. Centrifuge dewatering replaced pressing dewatering, can improve product quality, and achieve energy saving with good socio-economic benefits.

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Al Bakri, A. M. Mustafa, Mohd Noor Ahmad Fauzi, H. Kamarudin, M. N. Norazian, M. A. A. Salleh, and A. Alida. "Mechanical Properties of ZTA Composite Using Cold Isostatic Pressing and Uniaxial Pressing." Advanced Materials Research 740 (August 2013): 728–33. http://dx.doi.org/10.4028/www.scientific.net/amr.740.728.

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Alumina-zirconia composite is an engineering material with a great potential to be develop for application as high temperature resistance structural material. In this research, zirconia toughness alumina (ZTA) was produced by physical interaction between Al2O3powder and Y2O3-ZrO2powder. Two composition of powder with different Al2O3: Y2O3-ZrO2ratio was used, 70:30 and 80:20 by weight. Two different compaction methods, i.e. uniaxial pressing and cold isostatic pressing (CIP) with a maximum load of 150 MPa were used in this research to investigate the differences in properties of composites. Sintering process was done at four different temperatures with the heating rate is 5 o C/ min with a soaking time of five hours. Mechanical testing, i.e. compressive strength and hardness was performed to all samples. The microstructure analysis using a Scanning Electron Microscope SEM was also studied. From the result, the composite with the ratio of 70:30 showed better mechanical properties as compared to 80:20 composite. Addition of zirconia in the composite gave an increased in toughness due to transformation toughening mechanism of tetragonal to monoclinic phase. As a conclusion the composites produced high compaction green density will improved the sintering process, resulting in improved mechanical properties.

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Sas-Boca, Monica. "Experimental Study Regarding Compressing Process with Assisted Friction Force." Advanced Materials Research 23 (October 2007): 177–80. http://dx.doi.org/10.4028/www.scientific.net/amr.23.177.

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Friction between powder and tools plays a major role during cold compaction of PM components with results on the inhomogeneous densification. The present work deals with a new method of compaction for PM components by using the friction force between die and compacts as an active pressing force in order to reduce the density gradient. The proposal technique consists in moving the container of the die, during pressing stage to the punch direction with a well determined speed. As a result, the friction force acts in the same sense as the pressing load with better distribution of powder flow during compaction. The experimental results of compaction parameters versus density have proved the decreasing of the density gradient by increasing die/punch speed rate. A sharp density gradient on the specimen height moving container contrarily to the punch.

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Zhang, Zhen Tao, Zhao Bin Sun, Xue Hui Yang, and Yan Hua Dong. "Manufacturing Composite from Regenerated Wood Fiber and Polyethylene via Platen-Pressing Process." Advanced Materials Research 645 (January 2013): 39–42. http://dx.doi.org/10.4028/www.scientific.net/amr.645.39.

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The technology of manufacturing wood-plastic composite (WPC) using polyethylene powder (LDPE) and regenerated wood fiber was studied. The effects of board density, the amount of coupling agent, hot pressing time and temperature on product properties were determined. The results show that the optimal parameters for making WPC are the ratio of regenerated wood fiber to polyethylene 6:4, the amount of coupling agent 0%, hot pressing time 10min, hot pressing temperature 180°C, hot pressing pressure 3.0 MPa, the mass ratio of alcohol consumption to plastic 3%. The resultant WPC had a modulus of ruputre (MOR) value of 21MPa, modulus of elasticity (MOE) of 1482 MPa, internal bond strength (IB) of 1.20MPa, moisture content of 0.98%, 24h thickness swelling of 5.69% and 24h water absorption rate of 24.8%. The properties of WPC without coupling agent is close to that of products containing coupling agent.

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Iqbal, U. Mohammed, and V. S. Senthil Kumar. "Effect of Process Parameters on Microstructure and Mechanical Properties on Severe Plastic Deformation Process of Aa7075-T6 Aluminum Alloy." Advanced Materials Research 622-623 (December 2012): 705–9. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.705.

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Severe plastic deformation is one of the emerging and promising techniques applied to bulk materials to produce fine grain structure with attractive properties. This study aims to investigate the effect of extrusion parameters like extrusion temperature, number of passes on the equal channel angular pressing and twist extrusion forming behavior of AA7075-T6 Aluminum alloy by hot extrusion process. AA7075-T6 samples of 70x28x18 mm cross sections extruded by equal channel angular pressing and twist extrusion process was subjected to microstructure analysis, hardness and tensile tests in order to determine their mechanical properties. As a result of the experiments, it was determined that twist extrusion leads to more grain refinement at high temperatures with more number of passes compared to equal channel angular pressing. SEM micrographs show that there is severe orientation of the grains facilitated by the extrusion process which enhances the strength. The dense banding of the grains had effected in marginal hardness enhancement in the matrix of the specimens processed by twist extrusion and equal channel angular extrusion process.

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Rogovoy, А. А., and N. К. Salikhova. "Numerical modeling of the process of pressing steel billet." Computational Continuum Mechanics 7, no. 4 (2014): 453–59. http://dx.doi.org/10.7242/1999-6691/2014.7.4.43.

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Kolmogorov, G. L., N. A. Kosheleva, and T. V. Chernova. "OPTIMIZATION OF PROCESS TOOLS DURING TRIMETAL WORK-PIECES PRESSING." Izvestiya Vuzov. Tsvetnaya Metallurgiya (Proceedings of Higher Schools. Nonferrous Metallurgy), no. 1 (February 25, 2015): 55. http://dx.doi.org/10.17073/0021-3438-2014-1-55-58.

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Naizabekov, Abdrakhman, Sergey Lezhnev, Alexandr Arbuz, and Evgeniy Panin. "Computer Simulation of the Combined Process "Helical Rolling-Pressing"." Key Engineering Materials 716 (October 2016): 614–19. http://dx.doi.org/10.4028/www.scientific.net/kem.716.614.

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In this work a simulation of the innovation process "helical rolling – pressing" in the software package Simufact.Formingwas performed. The result is several models of this process. To analyze the feasibility of the process various key parameters that have a significant impact on the implementation processwere carried out. As a result, the optimal values of friction coefficients in the rolls and in the matrix, the angle of intersection of channels in the matrix and the distance of matrix from the deformation zone of the rollswere obtained.

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Wannapa, N., V. Tangwaradomnukun, and V. Uthaisangsuk. "Investigation of Joining Dissimilar Materials Using Hot Pressing Process." IOP Conference Series: Materials Science and Engineering 886 (July 28, 2020): 012058. http://dx.doi.org/10.1088/1757-899x/886/1/012058.

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Redouani, L., and S. Boudrahem. "Hot isostatic pressing process simulation: application to metal powders." Canadian Journal of Physics 90, no. 6 (June 2012): 573–83. http://dx.doi.org/10.1139/p2012-057.

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Deformation and transport mechanisms of matter, which intervene in the powder densification process by hot isostatic pressing (HIP), are very complicated to put into equation form. Their contribution to densification depends on powder characteristics, their configuration in aggregates, and the used HIP cycle parameters (temperature, pressure, and time). In this work, we have envisaged modifications that seemed to us necessary to bring to the previous simulations, so that their predictions will be related to experiment. New equations were established to evaluate the efficient pressure and the contributions of different mechanisms. The obtained results are used for the construction of densification diagrams by the HIP of copper, nickel, and tungsten powders and to the comparison with the experimental data. The comparative tables, between theoretical results and experimental data, were established for tin and lead. The simulation predictions are in good agreement with experimental results.

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Nigro, Norberto, and Mario Storti. "Hot-pressing process modeling for medium density fiberboard (MDF)." International Journal of Mathematics and Mathematical Sciences 26, no. 12 (2001): 713–29. http://dx.doi.org/10.1155/s0161171201020166.

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We present a numerical solution for the mathematical modeling of the hot-pressing process applied to medium density fiberboard. The model is based on the work of Humphrey (1982), Humphrey and Bolton (1989), and Carvalho and Costa (1998) with some modifications and extensions in order to take into account mainly the convective effects on the phase change term and also a conservative numerical treatment of the resulting system of partial differential equations.

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Mohammadi Aghbolagh, Vahid, Vali Alimirzaloo, and Ramin Khamedi. "Constrained groove pressing process of Al/Cu bimetal sheet." Materials and Manufacturing Processes 35, no. 2 (December 6, 2019): 130–41. http://dx.doi.org/10.1080/10426914.2019.1692351.

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Journal articles on the topic 'Pressing process'

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