THE INFLUENCE OF COMPRESSION MOLDING DURATION ON THE PROPERTIES OF COMPOSITE BRAKE SHOES FOR RAILWAY APPLICATION

IF 2.9 4区化学 Q2 POLYMER SCIENCE

Polymer International Pub Date : 2024-01-29 DOI:10.1002/pi.6615

Janviter Manalu, Johni Jonatan Numberi, Apolo Safanpo, Muhammad Fikri Hibatullah, Deni Fajar Fitriyana, Januar Parlaungan Siregar, Tezara Cionita, Jamiluddin Jaafar, Ahmad Yunus Nasution, Al Ichlas Imran

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Abstract

Railway brake shoes from composite materials are currently being developed and researched. Previous investigations have demonstrated the successful fabrication of brake shoes utilizing the hand lay-up method. However, it was observed that the resulting density did not meet the specified range of 1.7 to 2.4 g/cm³ defined by INKA (Indonesian Railway Company) Ltd. The purpose of this study was to examine the effect of compression molding duration on the characteristics of composite brake shoe. The composite manufacturing process was carried out using the compression cold molding method with a variation of pressing time for 20 minutes, 25 minutes, and 30 minutes and a pressing load of 20 MPa. The findings indicated that prolonging the duration of compression molding led to enhanced mechanical and physical properties of the brake shoe specimens. Utilizing a compression molding duration of 30 minutes provided the best possible outcomes in terms of density, hardness, flexural strength, thermal resistance, and coefficient of friction, which are 1.89 g/cm³, 80.20 Shore D Hardness, 34.15 MPa , 503.67^o C, and 0.38, respectively. The research findings demonstrate that the composite brake shoes manufactured have effectively fulfilled the physical, mechanical, and thermal criteria established by INKA Ltd. Unfortunately, the railway brake shoe sample failed to meet the specified coefficient of friction requirements as the resulting coefficient of friction exceeded 0.27.

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压缩成型持续时间对铁路用复合制动蹄性能的影响

目前正在开发和研究由复合材料制成的铁路制动蹄铁。先前的研究表明，利用手糊法成功地制造出了制动蹄铁。但研究发现，制动蹄片的密度并没有达到 INKA（印度尼西亚铁路公司）规定的 1.7 至 2.4 g/cm3 的范围。本研究的目的是考察压缩成型持续时间对复合材料制动蹄特性的影响。复合材料制造过程采用压缩冷模塑法，压制时间分别为 20 分钟、25 分钟和 30 分钟，压制载荷为 20 兆帕。研究结果表明，延长压缩成型时间可提高制动蹄片试样的机械和物理性能。压缩成型持续时间为 30 分钟时，在密度、硬度、抗弯强度、耐热性和摩擦系数方面都达到了最佳效果，分别为 1.89 g/cm3、80.20 Shore D 硬度、34.15 MPa、503.67o C 和 0.38。研究结果表明，制造出的复合材料制动蹄有效地满足了 INKA 有限公司制定的物理、机械和热标准。遗憾的是，铁路制动蹄片样品未能达到规定的摩擦系数要求，因为摩擦系数超过了 0.27。

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来源期刊

Polymer International 化学-高分子科学

CiteScore

7.10

自引率

3.10%

发文量

135

审稿时长

4.3 months

期刊介绍： Polymer International (PI) publishes the most significant advances in macromolecular science and technology. PI especially welcomes research papers that address applications that fall within the broad headings Energy and Electronics, Biomedical Studies, and Water, Environment and Sustainability. The Journal’s editors have identified these as the major challenges facing polymer scientists worldwide. The Journal also publishes invited Review, Mini-review and Perspective papers that address these challenges and others that may be of growing or future relevance to polymer scientists and engineers.