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Jurnal Polimesin
Published by Politeknik Negeri Lhokseumawe
ISSN : 16935462     EISSN : 25491199     DOI : http://dx.doi.org/10.30811/jpl
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering
Mechanical Engineering - Energy Conversion Engineering - Material Engineering - Manufacturing Technology - Mechatronics - Machine and Mechanism Design - Biomechanics
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 22 Documents
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Search results for , issue "Vol 23, No 1 (2025): February" : 22 Documents clear
Taguchi-based optimization of sheeting machine parameters for improved production speed Putra, William Maha; Martowibowo, Sigit Yoewono; Tabah, Gagan Ganjar
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.5612

Abstract

Sheeting machines play a crucial role in the packaging industry, making parameter optimization essential for enhancing efficiency. This study applies the Taguchi method to optimize key operational factors: roller speed, brake frequency, and pressure. Using ANOM and ANOVA, roller speed was identified as the most influential factor, contributing 82.76% in ANOM and 87.29% in ANOVA, followed by brake frequency (7.08% in ANOM, 7.36% in ANOVA). The F-test (95% confidence interval) confirmed that pressure had an insignificant effect, leading to its exclusion via a pooling-up strategy. Error contributions remained below 15%, ensuring that no critical factors were overlooked. Among interactions, only the roller speed–pressure (A × B) interaction significantly impacted production speed. The optimized parameters increased throughput from 33 to 42 sheets/min (27.3% improvement) and enhanced production robustness (S/N ratio) from 30 to 32.49 (8.3% increase). These findings confirm the effectiveness of the Taguchi method in refining sheeting machine performance.
Optimizing the making of written batik on mori cloth automatically using programmed canting motion with temperature and feed rate analysis Rizal, Akhmad Khoirur; Muzakhim, Azam
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.5635

Abstract

This study aims to optimize the technique of making batik writing on plain cloth using an automatic CNC machine with a regulated temperature and feed rate. Research methods were used. For testing the influence of variation in temperature (70 °C, 80 °C, and 90 °C) and feed rate against the quality of batik pattern and depth penetration of wax. Use of temperature sensors on electric ramps allows precise temperature control at a time-adapted rate, feeding for detection effects on thickness patterns and penetration wax. The result shows that improved temperature wax will increase its penetration in Mori, especially at a low feed rate, which produces a thicker pattern. Rate of displacement or a higher feed rate will speed up the process, but tends to reduce penetration wax and the thickness pattern. At a temperature of 90 °C and a feed rate of 450 mm/min. Quality is optimal for batik patterns and good wax. Balance between temperature wax and rate of displacement or feed rate is important to reach patterned batik results that are deep and consistent, which supports efficient batik production with still guard mark art
Mechanical and microstructural effects of varying welding currents in GTAW of 7075-T62 aluminum Septianissa, Selly; Hadining, Wanidya Ni’immallaili; Chandrasari, Ayu Zahra
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.6060

Abstract

Aircraft structures require diverse joining techniques, including riveting, bolting, bonding, and welding. While welding is less common in aerospace manufacturing due to concerns about the thermal sensitivity of aluminum alloys, it offers potential advantages such as weight reduction and the elimination of mechanical fasteners. This study investigates the effect of welding current on the microstructure and mechanical properties of 7075-T62 aluminum alloy welded using Gas Tungsten Arc Welding (GTAW) with ER 4043 filler metal. Welding currents of 40 A, 50 A, and 60 A were examined to assess their influence on tensile strength, hardness, and weld integrity. Results indicate that 50 A produces the highest tensile strength (34.297 kgf/mm²) and hardness (74.8 HRB), whereas 40 A results in lower tensile strength (26.471 kgf/mm²) and hardness (71.7 HRB). At 60 A, excessive heat input leads to increased porosity and deeper penetration, causing microstructural defects. The findings underscore the importance of optimizing welding parameters to balance mechanical performance and minimize defects. This study provides insights that are particularly relevant to aerospace applications, where reliable and high-strength welded joints are critical.
Impact of a dual-axis solar tracker and reflector glass on the performance of a 100Wp photovoltaic panel Siagian, Parulian; Peranginangin, SIWAN B; Kusuma, Budhi Santri; Sianturi, Roy Lamrun
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.5288

Abstract

Solar radiation varies by region, and photovoltaic (PV) panels typically achieve a maximum efficiency of 21%. This study examines the impact of a dual-axis solar tracker and 5mm reflector glass on the performance of a 100Wp photovoltaic system. The experiment was conducted for three days in September, involved placing reflector glass perpendicular to incoming sunlight to enhance light capture and thermal efficiency. Results showed that the system achieved a maximum efficiency of 19.31% at 10:00 AM on Day 2, with a peak power output of 31.08 W under an irradiance of 595.26 W/m². The lowest efficiency of 4.26% occurred at 8:15 AM on Day 3. The highest recorded temperature was 36.6°C, while the lowest was 30.4°C. The findings suggest that using a dual-axis tracker with reflector glass can improve PV panel efficiency and power generation by optimizing incident radiation and heat distribution
The effect of honeycomb and rectangular structures made with PLA 3D printing on the impact strength of sandwich composite Setiawan, Ferry; Sofyan, Rifal Ma'rifatulloh; Putra, Ikbal Rizky
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i4.3713

Abstract

Composites with a sandwich structure with a core using polymer materials has been widely applied, 3D printing technology makes polymer structures with various geometric variations, but research on the influence of geometric shapes made with 3D printing machines with PLA materials bonded using a one-step manufacturing process with a hand lay up method is still not widely done. The purpose of this study is to determine the comparison of the impact strength of sandwich composite materials with core honeycomb and rectangular made from PLA 3D printing made with a one-step process manufacturing system with the hand layup method. The sandwich composite composition used is fiberglass as the face skin and the matrix uses epoxy resin, where this resin also functions as an adhesive. The absorption energy data obtained with the best value was a honeycomb core specimen with an average value of 3.2758 Joules compared to the absorption energy data from the rectangular core which had an average value of 3.1552 Joules. The impact price data obtained with the best value was the honeycomb core with an average value of 0.0225 J/mm2, when compared to the impact price data from the rectangular core which had an average value of 0.0217 J/mm2. From this study, it can be concluded that sandwich composites with honeycomb cores have better impact strength property values because they have a more compact arrangement of materials that are bonded to each other on 6 sides, and also because honeycomb structures have a higher weight of 20 grams compared to rectangular structures that weigh 18.
Effect of palm fiber volume fraction for enhancing the physical and mechanical properties of epoxy composites Kartika Sari; Sunardi -; Yazid Zainur Isnen; Agung Bambang Setio Utomo; Parmin Lumban Toruan; Ampala - Khoryanton
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.5692

Abstract

Reinforcing materials such as fiber; are most widely used to give new properties to composites. This study investigates the effect of palm fiber (Arenga pinnata) volume fraction on the physical and mechanical properties of epoxy-based composites. Composite specimens with 0% and 2.5% fiber volume fractions were fabricated, maintaining a uniform thickness of 2 mm. The fabrication process involved fiber extraction, mixing with epoxy resin, and controlled curing. The physical properties assessed included density, porosity, and water absorption, while mechanical testing involved tensile and bending tests. The results demonstrated that the 2.5% fiber-reinforced composite exhibited improved properties compared to the 0% fiber composite. The density increased from 5.85 g/cm³ to 13.43 g/cm³, while porosity and water absorption rose slightly to 0.40% and 0.03%, respectively. In mechanical testing, the tensile strength increased from 2.64 MPa to 6.29 MPa, while strain improved from 1.06% to 4.59%. Young’s modulus, however, decreased from 2.49 MPa to 1.37 MPa, indicating enhanced flexibility. The bending stress increased from 6.35 MPa to 10.85 MPa, and deflection improved from 1.45 mm to 7.35 mm. These findings indicate that incorporating 2.5% palm fiber provides an optimal balance between strength and flexibility, making it a promising reinforcement for lightweight composite applications.
Enhancing seawater desalination performance using a vortex generator in a modified window air conditioner Nurkholid, Nurkholid; Mugisidi, Dan; Widodo, Widodo; Heriyani, Oktarina; Sulistiono, Ibnu
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.6110

Abstract

The growing demand for air conditioning systems has driven research into alternative applications, such as seawater desalination. This study evaluates the performance of a modified window air conditioner (WAC) integrated with a vortex generator for desalination. Experiments were conducted using R410A refrigerant under four conditions: closed container (CC), without vortex (WV), connected vortex (CV), and separated vortex (SV). Seawater was heated via the condenser to 55–60°C, controlled by a thermostat, and data was collected every five minutes over eight hours. The thermodynamic properties of R410A were analyzed using Refprop software to determine refrigeration effect (RE), compression work (CW), and coefficient of performance (COP). Results indicate that the SV configuration achieved the highest evaporation rate (5.01 kg) but led to a lower COP (3.91) due to increased condenser temperature and compressor workload. Conversely, CC yielded the highest COP (5.08) by stabilizing the evaporator air temperature and reducing compressor effort. These findings suggest that vortex generators enhance evaporation rates but reduce system efficiency. Further research is needed to optimize vortex generator configurations to improve desalination efficiency while minimizing COP reduction.
Design, production, and mechanical analysis of water-draining symmetrical sandals for slip prevention Syamsul Hadi; Hangga Wicaksono; Muhammad Fakhruddin; Muhammad Nuhin; Muhammad Dafi Juniar Pradana; Aini Zuhra Binti Abdul Kadir; Muhd Ikmal Isyraf bin Mohd Maulana; Tuty Asma Abu Bakar
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.6143

Abstract

Slipping accidents in ablution areas, sometimes leading to serious injuries or death, highlight the need for safer footwear. This study focuses on the design, production, and mechanical evaluation of symmetrical sandals with an elastic rubber-plastic composite base featuring horizontally branched drainage holes in the heel and phalange areas. The goal is to develop a sandal that effectively channels excess water away from the foot, minimizing slip hazards. The methodology includes symmetrical sandal design, mold fabrication, injection molding trials, and mechanical testing. The results indicate that the sandal base exhibits an elasticity range of 8 to 9.5 kg·s/mm, allowing effective water drainage. The tensile strength of the straps ranges from 17.1 to 20.8 kgf, surpassing the Indonesian National Standard (SNI 8879:2020) requirement of 12 kgf. These findings suggest that the sandal design enhances safety while maintaining durability.
Tensile and morphological properties of carbon-coir fiber reinforced epoxy hybrid composites Salahuddin Junus; Yayang Saif Izzudin; Aris Zainul Muttaqin; Danang Yudistiro; Mochamad Asrofi; Sumardi Sumardi; Puranggo Ganjar Widityo; Revvan Rifada Pradiza
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.5523

Abstract

This study reports the tensile and morphological properties of carbon fiber-reinforced epoxy composites  with the addition of coconut coir fiber. The composites were fabricated using the vacuum infusion method with coconut fiber weight fractions of 5%, 15%, and 25%. Tensile testing revealed that the highest tensile strength (70.92 MPa) was achieved at 15% fiber content, while 5% fiber content resulted in the lowest tensile strength (32.48 MPa). Scanning Electron Microscopy (SEM) and metallographic analyses showed variations in fiber-matrix bonding, with debonding and fiber pull-out observed at lower fiber content. The results suggest that optimal fiber-matrix bonding and fiber dispersion contribute to tensile strength enhancement, confirming the potential of coconut fiber-reinforced hybrid composites for structural applications
Experimental study on the effect of drying temperature on the final quality of dried fish Syuhada, Ahmad; Razali, Razali; Rizkia, Rizkia
Jurnal Polimesin Vol 23, No 1 (2025): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i1.5376

Abstract

The production of dried fish is a key community efforts to increase the economic value of fish in the Aceh region, with most product sold in traditional markets. To improve the community's economy, the quality of dried fish must be enhanced to meet the standards of modern markets. This research aims to improve the production system and quality of dried fish. The study examines the effect of drying temperature on the quality of dried fish by comparing two methods: constant drying temperature and gradual reduction. The constant drying temperature was set at 80°C, while the gradual reduction started at 80°C and decreased by 10°C every 2 hours until reaching 60°C. The results showed that the drying temperature significantly impacts the final quality of dried fish. Drying at a constant temperature of 80°C resulted in a harder texture and darker color of the dried fish compared to the gradual reduction method. This is due to the rapid heat and mass transfer processes causing case hardening in the fish, making its texture harder. This research provides valuable insights to improve the drying process and ensure the production of high-quality dried fish.

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