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Journal articles on the topic 'Low pressure molding'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

Azmoudeh, S., H. Zamani, and K. Shelesh-Nezhad. "Influence of Injection Molding Parameters on the Consistency of Molding Process." Applied Mechanics and Materials 446-447 (November 2013): 398–402. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.398.

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The existence of variations in the injection molding process conditions leads to the inconsistency of molded parts quality during the molding cycles. In this research, the variations of cavity pressure-time profiles integrals over the molding cycles were accounted as the molded parts quality variations. Thereafter, the correlations between injection molding process settings and the degree of consistency of molding process were investigated by applying cavity pressure measurement, Taguchi design of experiments approach and signal to noise ratio. The results derived from experiments indicated th

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12

Miyamoto, Kei, Yuzuru Takahashi, Suguru Inamura, and Hiroki Miyamoto. "Preparation of Al2O3 ceramics by low pressure injection molding method." Journal of the Japan Society of Powder and Powder Metallurgy 34, no. 9 (1987): 378–82. http://dx.doi.org/10.2497/jjspm.34.378.

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13

Miyamoto, Kei, Yuzuru Takahashi, Suguru Inamura, and Hiroki Miyamoto. "Preparation of Si3N4 ceramics by low pressure injection molding method." Journal of the Japan Society of Powder and Powder Metallurgy 35, no. 7 (1988): 633–35. http://dx.doi.org/10.2497/jjspm.35.633.

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14

Wang, Quan, Chongying Yang, Kaihui Du, and Zhenghuan Wu. "Effect of micro injection molding parameters on cavity pressure and temperature assisted by Taguchi method." Mechanics 25, no. 4 (2019): 261–68. http://dx.doi.org/10.5755/j01.mech.25.4.20999.

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The injection molding process is one of the most efficient processes where mass production through automation is feasible and products with complex geometry at low cost are easily attained. In this study, an experimental work is performed on the effect of injection molding parameters on the polymer pressure and temperature inside the mold cavity. Different process parameters of the injection molding are considered during the experimental work including packing pressure, packing time, injection pressure, mold temperature, and melt temperature. The cavity pressure is measured with time by using

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15

Tao, Wen Hong, Xing Hua Fu, and Zhong Xi Yang. "Study on Using Low Quality Fly Ash to Produce Baking-Free Bricks." Advanced Materials Research 306-307 (August 2011): 1106–9. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.1106.

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In this paper we studied the feasibility of baking-free bricks which were produced in condition of high pressure and natural curing. Studied the influence of shaping pressure, molding water on performances of baking-free bricks, and the active probability of activating agents which contain phosphogypsum, and lime of different amounts. The experiments showed that the best shaping pressure is 20MPa, the preferable molding water is 14-18%, and the best raw material composition is 50% fly ash, 33% stone clips, 4% phosphogypsum, 3% lime, and 10% cement. SEM was used to study the relationship betwee

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16

Wu, Chang Ming, Yan Yang, Hui Min Sun, et al. "Effect of Molding Processing on Properties of YAG Porous Ceramics via Dry Pressing Molding Method." Materials Science Forum 934 (October 2018): 134–39. http://dx.doi.org/10.4028/www.scientific.net/msf.934.134.

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YAG materials have a number of unique properties, the application is very extensive. In order to improving the properties of YAG porous materials, the effect of forming processing on the properties of YAG porous ceramics is investigated. Through the results and analysis, the conclusions showed that the porosity of YAG porous ceramics gradually decreased with the molding pressure increases, and the compressive strength of YAG porous ceramics shows a rising trend. The size and number of pores in the microstructure are reduced with increasing the forming pressure, there are inherently many voids

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17

Liberati, João Franklin, Oscar O. Araujo Filho, Waldemar Alfredo Monteiro, Iara M. Esposito, Rejane A. Nogueira, and Francisco Ambrozio Filho. "Low-Pressure Injection Molding Processing of AISI T15 High Speed Steel Powders." Materials Science Forum 514-516 (May 2006): 569–73. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.569.

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Low-pressure powder injection molding was used to obtain AISI T15 high speed steel parts. The binders used were based on paraffin wax, low density polyethylene and stearic acid. The metals powders were characterized in terms of morphology, particle size distribution. The mixture was injected in the shape of square bar specimens to evaluate the performance of the injection in the green state, and then sintered. The samples were injected under the pressures of 0.4, 0.5 and 0.7MPa and at temperatures varying from 110 to 150°C aiming the optimization of the process. The results of the variation of

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18

SAEKI, Junichi, Aizo KANEDA, and Tadao SHINODA. "Flow and heat transfer of an epoxy molding compound for low pressure transfer molding in channels." KOBUNSHI RONBUNSHU 45, no. 2 (1988): 97–103. http://dx.doi.org/10.1295/koron.45.97.

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19

Wu, Li Ying. "Study on Form Process of Resin Composite Material and Graphic Artist Designer." Applied Mechanics and Materials 608-609 (October 2014): 41–45. http://dx.doi.org/10.4028/www.scientific.net/amm.608-609.41.

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The paper analyze development process of the advanced resin matrix composite materials forming technology, that is low pressure molding, pultrusion process, molding, filament winding forming process, placement molding process, molding process of RTM, and analyze the key technology in the development process, to study the evolvement of advanced composite material molding process, so as to explore the future development direction of forming resin based composite material technology.

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20

Chen, Mei Hua, Yan Yang, Wang Chen, et al. "Effect of Molding Method on the Properties of Prepared Quartz Sand Sintered Brick Using the River Sand." Solid State Phenomena 279 (August 2018): 261–65. http://dx.doi.org/10.4028/www.scientific.net/ssp.279.261.

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In order which aim to save land resource and use low grade nature resource to realize high cost performance product. In this paper, the molding method of quartz sand fired brick is discussed. As the plastic (hand pressing) is only used to manually beat the mud mass, the sludge is squeezed by hand. Into the mold and molding and cold isostatic pressure molding pressure of 100 MPa, The difference is far away, which makes the gaps between the particles close to each other greatly different, the pressure of hand-press molding is small, the voids in the blank after molding are large and the hole dia

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21

Iwami, Hiroyuki. "Advanced Cavity-Core System Mold for Ultra Low Pressure Injection Molding." Seikei-Kakou 9, no. 2 (1997): 123–27. http://dx.doi.org/10.4325/seikeikakou.9.123.

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22

Miyamoto, Kei, Yuzuru Takahashi, Suguru Inamura, and Hiroki Miyamoto. "Preparation of Si3N4 ceramics by low pressure injection molding method. (II)." Journal of the Japan Society of Powder and Powder Metallurgy 36, no. 2 (1989): 192–94. http://dx.doi.org/10.2497/jjspm.36.192.

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23

SAEKI, Junichi, Aizo KANEDA, and Tadao SHINODA. "Flow characteristics of epoxy resin systems for low pressure transfer molding." KOBUNSHI RONBUNSHU 43, no. 12 (1986): 873–79. http://dx.doi.org/10.1295/koron.43.873.

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24

Lin, Xin, Shigeki Matsuya, Masaharu Nakagawa, Yoshihiro Terada, and Kunio Ishikawa. "Effect of molding pressure on fabrication of low-crystalline calcite block." Journal of Materials Science: Materials in Medicine 19, no. 2 (2007): 479–84. http://dx.doi.org/10.1007/s10856-006-0028-7.

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25

Kashimoto, A., Y. Nonomura, H. Hotta, T. Suzuki, Y. Kaneko, and K. Iitaka. "Soft press: the ultra-low pressure molding technology for powder cosmetics." International Journal of Cosmetic Science 26, no. 6 (2004): 317. http://dx.doi.org/10.1111/j.1467-2494.2004.00244_1.x.

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26

Toy, Ç., Y. Palaci, and T. Baykara. "A new ceramic thread-guide composition via low-pressure injection molding." Journal of Materials Processing Technology 51, no. 1-4 (1995): 211–22. http://dx.doi.org/10.1016/0924-0136(94)01607-3.

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27

Lamarre, Simon G., Vincent Demers, and Jean-François Chatelain. "Low-pressure powder injection molding using an innovative injection press concept." International Journal of Advanced Manufacturing Technology 91, no. 5-8 (2017): 2595–605. http://dx.doi.org/10.1007/s00170-016-9889-1.

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28

Li, Yanlong, Kangsen Li, and Feng Gong. "Fabrication and Optical Characterization of Polymeric Aspherical Microlens Array Using Hot Embossing Technology." Applied Sciences 11, no. 2 (2021): 882. http://dx.doi.org/10.3390/app11020882.

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Hot embossing has been widely used in fabricating microlens arrays because of its low cost, high efficiency, and high quality. The process parameters such as molding temperature, molding pressure, and holding temperature affect the microlens array’s replication quality. This work selected the stainless steel S136H tool steel as the mold material to process an aspheric microlens array structure through ultra-precision milling. Polymethyl methacrylate (PMMA) microlens arrays with different surface replication were prepared by controlling the molding temperature, molding pressure, and holding tem

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29

Wang, Jian Wei, Yan Shan Sun, Zi Ren Jin, Zhi Yuan Feng, and Fu Gui Dong. "Effect of Densification Conditions on Physical Quality of Densified Sorghum Straw Briquette Fuel." Applied Mechanics and Materials 339 (July 2013): 651–56. http://dx.doi.org/10.4028/www.scientific.net/amm.339.651.

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An experiment was conducted on densification processing of sorghum straw stalks with self-made steel molds on a hydraulic universal test platform. The influences of different densification conditions on physical quality of briquette fuel are investigated, including pressures, temperatures, moisture contents and straw preheating method. Moreover, the relationship between molding temperature and inner stress decreasing rate of straw briquette at holding pressure stage is also analyzed. The result shows that the suitable value of moisture content, temperature and molding pressure for straw compre

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30

Hu, Jian Jun, Quan Guo Zhang, Ting Zhou Lei, and Zhi Wei Wang. "Experimental Study on the Wet Molding for Wheat Straw Pellet Fuel." Advanced Materials Research 156-157 (October 2010): 284–92. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.284.

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In the paper, in order to investigate the situation of impact on wet molding for straw of compressing speed and moisture ratio, and look for the inside law between them, closed compress experimental study on the wet molding for wheat straw pellet fuel was done by electrical universal material experimental machine and experimental provision made by oneself. Study on the impact situation for compressing speed and moisture ratio was done from pressure intensity, displacement and density of materiel. The result, which low compressing speed and low moisture ratio were propitious to wet molding, was

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31

Ogawa, Masanori, Hiroyuki Ikeda, Hideki Nishijima, Akira Sakakibara, and Masaru Satou. "The Development of the Molding System Exclusively for Assist Grip by the Low Pressure Air Assist Injection Molding." Seikei-Kakou 22, no. 9 (2010): 486–90. http://dx.doi.org/10.4325/seikeikakou.22.486.

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32

Miyamoto, Kei, Suguru Inamura, Yuzuru Takahashi, and Hiroki Miyamoto. "Low pressure Injection Molding and HIP Sintering of Al2O3 of High Purity." Journal of the Japan Society of Powder and Powder Metallurgy 38, no. 6 (1991): 782–86. http://dx.doi.org/10.2497/jjspm.38.782.

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33

Li, Jian, Kai Zhang, and Xun Zhang Yu. "Thickening Mechanism of Crystalline Polyester Involved in Low Pressure Sheet Molding Compounds." Advanced Materials Research 152-153 (October 2010): 619–22. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.619.

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In this article, for a better understanding of the viscosity changes in LPMC (low pressure sheet molding compounds), the thickening mechanism of crystalline polyesters was studied. And by means of varying the content of crystalline polyester resin, the thickening effect on resin paste was investigated, too. Results gained during experiments showed that there existed three kinds of functions acting in the process of thickening: swelling, hydrogen bonds and induction crystallization. The thickening effect was excellent when the amount of crystalline polyester resin was 3%. This research supports

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34

Nakao, Shuya, Mitsuhiro Saito, Kenji Tanaka, and Kiichi Minai. "Influence of agglomeration upon dewaxing properties of greenware for low pressure molding." Advanced Powder Technology 7, no. 3 (1996): 207–17. http://dx.doi.org/10.1016/s0921-8831(08)60497-5.

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35

Huang, Jung-Tang, and Shao-Chang Cheng. "Study of injection molding pressure sensor with low cost and small probe." Sensors and Actuators A: Physical 101, no. 3 (2002): 269–74. http://dx.doi.org/10.1016/s0924-4247(02)00217-0.

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36

Rei, M., E. C. Milke, R. M. Gomes, L. Schaeffer, and J. P. Souza. "Low-pressure injection molding processing of a 316-L stainless steel feedstock." Materials Letters 52, no. 4-5 (2002): 360–65. http://dx.doi.org/10.1016/s0167-577x(01)00422-0.

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37

Guan, Qing, Xiaoguang Zhu, Dan Chiu, Kaizhi Shen, F. S. Lai, and S. P. McCarthy. "Self-reinforcement of polypropylene by oscillating packing injection molding under low pressure." Journal of Applied Polymer Science 62, no. 5 (1996): 755–62. http://dx.doi.org/10.1002/(sici)1097-4628(19961031)62:5<755::aid-app6>3.0.co;2-v.

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38

Sardarian, M., O. Mirzaee, and A. Habibolahzadeh. "Mold filling simulation of low pressure injection molding (LPIM) of alumina: Effect of temperature and pressure." Ceramics International 43, no. 1 (2017): 28–34. http://dx.doi.org/10.1016/j.ceramint.2016.07.224.

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39

Smid, Ivi, and Gaurav Aggarwal. "Powder Injection Molding of Niobium." Materials Science Forum 475-479 (January 2005): 711–16. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.711.

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Niobium and niobium-based alloys are used in a variety of high temperature applications ranging from light bulbs to rocket engines. Niobium has excellent formability and the lowest specific weight among refractory metals (Nb, Ta, Mo, W, and Re). Powder injection molding of niobium powder was investigated for efficiency of the process. The sintering of injection molded bars was conducted up to 2000°C in vacuum and low oxygen partial pressure atmosphere. This paper investigates the effect of sintering time, temperature and atmosphere on processing of pure niobium.

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40

Zhang, Qiu Li, Xuan Cheng, Xin Zhe Lan, and Xi Cheng Zhao. "The Molding Process for Synthesizing Formed Coke with Low Rank Pulverized Coal." Advanced Materials Research 512-515 (May 2012): 2043–46. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.2043.

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The paper investigates the molding process of producing formed coke with low rank pulverized coal. When the bentonite as binder, the technological conditions mainly including bentonite content, forming pressure, forming moisture and particle size factors which effect on the strength of formed cokes were systematically discussed and obtained the optimal conditions. Under the conditions of amount of bentonite 5%, forming pressure 40kN, moisture content 14%, and fine coal particle size<5mm the formed coke with strength of 600N/ball was prepared and it satisfied the standard of gasification beh

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41

Wang, Guilong, Guoqun Zhao, Guiwei Dong, Libin Song, and Chul B. Park. "Lightweight, thermally insulating, and low dielectric microcellular high-impact polystyrene (HIPS) foams fabricated by high-pressure foam injection molding with mold opening." Journal of Materials Chemistry C 6, no. 45 (2018): 12294–305. http://dx.doi.org/10.1039/c8tc04248a.

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42

Wang, Yue, and Guang Hong Hu. "Research Progress of Improving Surface Quality of Microcellular Foam Injection Parts." Applied Mechanics and Materials 66-68 (July 2011): 2010–16. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.2010.

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Microcellular foam injection parts have many advantages such as saving material and energy, reducing cycle time, and processing excellent dimensional stability. Despite these advantages, the low surface quality problems limit its application scope seriously. In this study, the microcellular foam injection molding principle and some surface defects were introduced, and the technologies to improve surface quality, such as Gas Counter Pressure (GCP), Rapid Heat Cycle Molding (RHCM), and Film Insulation were summarized in detail. Finally, the prospect of CAE technologies about microcellular foam i

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43

Bakan, H. I., and M. Gunes. "Development of Water Soluble Binder Systems for Low Pressure Injection Molding of Alumina." Key Engineering Materials 264-268 (May 2004): 313–16. http://dx.doi.org/10.4028/www.scientific.net/kem.264-268.313.

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44

Fareh, Faoud, V. Demers, S. Turenne, and O. Scalzo. "Segregation Measurement of Inconel 718 Feedstocks Used in Low-Pressure Metal Injection Molding." Materials Science Forum 857 (May 2016): 286–90. http://dx.doi.org/10.4028/www.scientific.net/msf.857.286.

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Low-pressure metal injection molding (LP-MIM) is an advanced manufacturing technology where a wax-based feedstock is injected into a complex shape before densification heat treatments. Feedstock is generally designed to minimize segregation, maximize flowability, maximize the strength of the molded component, maximize the solid loading potential and ease of debinding. In this study, the emphasis is placed on the evaluation of the effect of segregation on different wax-based Inconel 718 superalloy feedstocks used in LP-MIM. In powder metallurgy, particle or phase segregation generates a fluctua

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45

Li, Jian, and Zhi Xiong Huang. "Design of Thermal Transferring of Plane Mould for Low Pressure Sheet Molding Compound." Applied Mechanics and Materials 44-47 (December 2010): 2607–11. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2607.

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Mathematical simulation of mold flow of glass fibers and design of heat transferring of plane mould for low pressure sheet molding compound were analyzed and optimized by MATLAB software in this article. The flexural properties of specimens molded in conventional and thermal-deign optimized mould were compared. The fracture surfaces of specimens were carefully investigated by SEM, too. The results show that the surface temperature of the mould was highly uniform during the process of curing when the distribution of the heating pipes in the plane mould was optimized. The flexural strengths of t

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46

Dotta, Aline Luisa Bandeira, Carlos Alberto Costa, and María Cristina Moré Farias. "Tribological behavior of alumina obtained by low-pressure injection molding using factorial design." Tribology International 114 (October 2017): 208–20. http://dx.doi.org/10.1016/j.triboint.2017.04.015.

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47

Arefmanesh, A., S. G. Advani, and E. E. Michaelides. "A numerical study of bubble growth during low pressure structural foam molding process." Polymer Engineering and Science 30, no. 20 (1990): 1330–37. http://dx.doi.org/10.1002/pen.760302011.

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48

Schlechtriemen, Nadja, Joachim R. Binder, Christina Hane, Marcus Müller, Hans-Joachim Ritzhaupt-Kleissl, and Jürgen Haußelt. "Manufacturing of Net-Shape Reaction-Bonded Ceramic Microparts by Low-Pressure Injection Molding." Advanced Engineering Materials 11, no. 5 (2009): 339–45. http://dx.doi.org/10.1002/adem.200800377.

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49

Kuang, Tang Qing, and Kun Han. "Study on the Flow Behavior in Thin Cavity during Water-Assisted Injection Molding." Key Engineering Materials 467-469 (February 2011): 80–83. http://dx.doi.org/10.4028/www.scientific.net/kem.467-469.80.

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A numerical simulation model for the flow behavior of fluids in thin cavity during water assisted injection molding process is built up by adopting general Newtonian fluid model for the filling stage and non-Newtonian and compressible fluid model for the packing stage separately. Finite element/finite difference/control volume methods are adopted for the simulation of melt front, pressure variation at injection location, water thickness fraction and bulk temperature about a plate with trapezoidal cross-section. The simulated melt front location and shape have good agreement with experimental r

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Llewelyn, Rees, Griffiths, and Jacobi. "A Novel Hybrid Foaming Method for Low-Pressure Microcellular Foam Production of Unfilled and Talc-Filled Copolymer Polypropylenes." Polymers 11, no. 11 (2019): 1896. http://dx.doi.org/10.3390/polym11111896.

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Abstract:

Unfilled and talc-filled Copolymer Polypropylene (PP) samples were produced through low-pressure foam-injection molding (FIM). The foaming stage of the process has been facilitated through a chemical blowing agent (C6H7NaO7 and CaCO3 mixture), a physical blowing agent (supercritical N2) and a novel hybrid foaming (combination of said chemical and physical foaming agents). Three weight-saving levels were produced with the varying foaming methods and compared to conventional injection molding. The unfilled PP foams produced through chemical blowing agent exhibited the strongest mechanical charac

APA, Harvard, Vancouver, ISO, and other styles

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