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Huang PW, Peng HS. Fabrication, property characterization, and benefit analysis of mixing mechanism of nitrogen and melt, and its comparison of the porous-foam polypropylene injection molding parts. JOURNAL OF POLYMER ENGINEERING 2023. [DOI: 10.1515/polyeng-2022-0285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
Abstract
In this study, an injection molding machine with a mixing mechanism of nitrogen (N2) and melt was designed, and the melt-fill/porous-foaming behavior is observed under the novel barrel design (plasticizing stage) of the gas/melt mixing for the porous injection molded thermoplastic. The thermoplastic employed in this study was polypropylene (PP), and the gas for forming the porous structure is N2. In addition, a thickness of 5 mm and a width of 10 mm paper-clip shape and the mold were constructed for studying the melt-fill-length and fill-length ratio through an experiment. The experimental results showed that the use of an injection molding machine with a mixing mechanism of N2 and melt decreased the melt-fill-length when the N2-output pressure was increased. The reason is that when the gas output, the speed of the screw will be affected. Therefore, during the gas/melt mixing and the plasticization rate will also affect the volume of the foam and the melt. But during plasticizing setting back pressure, can improve its melt volume reduction. When passing through the mixing mechanism and the injected melt, the melt is filled into the mold cavity, and the pressure in the melt is released/porous-foaming grows. At the same time, when the output pressure increases, the amount of melt in the injection barrel will decrease, and its relative porous structure/density distribution will increase. In addition, the mixing/flow direction of the melt impacted the density distribution and dispersion of porous foaming, thus the sample weight/shrinkage of melt-fill-length test sample (Mfl-ts) was improved.
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Affiliation(s)
- Po-Wie Huang
- Ph. D. Program of Mechanical and Aeronautical Engineering , College of Engineering, Feng Chia University , Taichung 40724 , Taiwan
| | - Hsin-Shu Peng
- Mechanical and Computer-Aided Engineering , College of Engineering, Feng Chia University , Taichung 40724 , Taiwan
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You Y, Jiang T, Liu B, Xing J, Yang J, Zeng X, Zhang C, Gong W, He L. A simple melt blending method for preparing
PP
/
HMSPP
foaming composites with superior surface appearance and mechanical performance. POLYM ADVAN TECHNOL 2023. [DOI: 10.1002/pat.6003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Yujing You
- College of Materials and Metallurgy, Guizhou University Guiyang Guizhou People's Republic of China
- College of Materials Science and Metallurgy Engineering, Guizhou Institute of Technology Guiyang Guizhou People's Republic of China
| | - Tuanhui Jiang
- College of Materials and Metallurgy, Guizhou University Guiyang Guizhou People's Republic of China
- College of Materials Science and Metallurgy Engineering, Guizhou Institute of Technology Guiyang Guizhou People's Republic of China
| | - Bujin Liu
- College of Materials and Metallurgy, Guizhou University Guiyang Guizhou People's Republic of China
- College of Materials Science and Metallurgy Engineering, Guizhou Institute of Technology Guiyang Guizhou People's Republic of China
| | - Jinfu Xing
- College of Materials and Metallurgy, Guizhou University Guiyang Guizhou People's Republic of China
- College of Materials Science and Metallurgy Engineering, Guizhou Institute of Technology Guiyang Guizhou People's Republic of China
| | - Jingkui Yang
- College of Materials and Metallurgy, Guizhou University Guiyang Guizhou People's Republic of China
- College of Materials Science and Metallurgy Engineering, Guizhou Institute of Technology Guiyang Guizhou People's Republic of China
| | - Xiangbu Zeng
- College of Materials and Metallurgy, Guizhou University Guiyang Guizhou People's Republic of China
- College of Materials Science and Metallurgy Engineering, Guizhou Institute of Technology Guiyang Guizhou People's Republic of China
| | - Chun Zhang
- National Engineering Research Center for Compounding and Modification of Polymeric Materials Guiyang Guizhou People's Republic of China
| | - Wei Gong
- College of Materials and Metallurgy, Guizhou University Guiyang Guizhou People's Republic of China
| | - Li He
- College of Materials and Metallurgy, Guizhou University Guiyang Guizhou People's Republic of China
- College of Materials Science and Metallurgy Engineering, Guizhou Institute of Technology Guiyang Guizhou People's Republic of China
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Doan TTL, Müller MT, Nguyen HM. Effects of different polyolefin copolymers on properties of melt mixed polypropylene blends. J Appl Polym Sci 2022. [DOI: 10.1002/app.52691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Thi Thu Loan Doan
- The University of Danang ‐ University of Science and Technology Da Nang Vietnam
| | | | - Hoang M. Nguyen
- The University of Danang ‐ University of Science and Technology Da Nang Vietnam
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