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All Journal International Journal of Advances in Applied Sciences Jurnal Keperawatan Jurnal Teknik Industri Prosiding Seminar Nasional MIPA CAUCHY: Jurnal Matematika Murni dan Aplikasi Info-Teknik Prosiding SI MaNIs (Seminar Nasional Integrasi Matematika dan Nilai-Nilai Islami) Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Aplikasi Dan Inovasi Ipteks SOLIDITAS Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Community Development Journal: Jurnal Pengabdian Masyarakat Automotive Experiences Indonesian Community Journal Logic : Jurnal Rancang Bangun Dan Teknologi Jurnal Teknik Mesin Jurnal Polimesin
Moh Hartono
Politeknik Negeri Malang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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The Effect of Injection Pressure and Injection Temperature in The Compression Moulding Process on Flashing Defects of Shoulder Products Moh Hartono; Febrian Akbar Pratama
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 1 (2025): March
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i1.13-18

Abstract

Plastic objects are everywhere: toys, household utensils, playthings, and cosmetic containers. One of the processes used was the plastic production process in the compression molding process to make a cover (shoulder) on the tube. Flashing defects are one of the biggest defects that can cause a product to fail in the assembly of shoulder extrusion tube products in PT. XYZ. This research was to determine the effect of injection pressure and injection temperature parameters on flashing defects in shoulder extrusion tube products. This research uses quantitative research and experimental research methods to collect data. Varying parameter settings carry out this method with an injection pressure of  4 bar, 5 bar, and 6 bar as well as injection temperatures of  250°C, 260°C, and 270°C. The results of the study show that both parameters have significant effects on the flashing defects in shoulder extrusion tube products. The combination of injection pressure of 4 bar and injection temperature of 250°C resulting in flashing defects of 0 mm or no defects.
The Effect of Sengon Wood Powder Particle Size and Composite Composition on The Performance of Non-Asbestos Brake Linings Robby Ridwan; Moh Hartono
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 1 (2025): March
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i1.1-12

Abstract

The purpose of this study was to determine the effect of particle size and composite composition on the mechanical properties of non-asbestos brake linings. This type of research uses quantitative experiments. There are 3 kinds of variables used, namely a) independent variables consisting of particle size and composite composition; b) dependent variables consisting of hardness value and wear rate value; c) controlled variables consisting of shore D durometer method and Wear Rate with 800 rpm, 120 seconds time, and 20 psi pressure. The data analysis technique uses the factorial anova method because it is to determine the effect of the interaction between particle size and composite composition on brake lining. Data analysis was carried out twice, namely hardness test data and wear rate tests. After that, the data obtained was processed using the Minitab application. The results showed that particle size and composite composition affect the hardness and wear of brake lining. Smaller particle size increases hardness, especially in specimens using Fe composition. The use of iron powder resulted in higher hardness. Iron powders with better mechanical properties showed lower wear rates. The interaction effect of particle size and composite composition on brake lining performance is that the interaction of the two independent variables has a significant effect on brake lining performance.
The Effect of Chiller and Hot Runner Temperature on Appearance of 100 mL Pet Bottle Products Through the Stretch Blow Molding Process Moh. Hartono; Prihadi Mulya Pradana
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 3 (2024): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i3.117-128

Abstract

The using of plastic in human life is increasing over time. This increase occurs because plastic is not easily broken, flexible, practical, economical, and can replace the function of other items. One of the plastic molding processes is Injection Stretch Blow Molding, a plastic molding machine method that combines two processes, namely injection molding and stretch blow molding. The injection stretch blow molding process is a plastic molding machine that is melted and then injected into the mold to form a preform that is stretched and blown to form the product. This machine has a high level of precision so that the aspects of strength and appearance quality on the packaging bottle are the main assessment. The aim of this research is to determine the effect of temperature parameters on black spots, stripes and stripes on 100 mL PET bottle products. It is necessary to handle chiller temperature, hot runner temperature as independent variables in printing preforms.  The control variables are material composition, cycle time, holding time, and component gap position. This type of research is experimental research and the processing method used in this research uses the design of experiments using statistical software. The level of variation in hot runner temperature parameter settings is 265°C, 270°C, and 275°C and chiller temperature is 17°C, 18°C, and 19°C. From the results of this research, it can be concluded that the significant parameters used for the chiller are 18°C, the appearance defect is 0.2% and for the hot runner it is 270°C, the appearance defect is 0.4%. This number is a significant parameter that produces fewer appearance defects for 100 mL PET bottle products in order to reduce the number of rejects.
ANALYSIS OF THE IMPACT TEST STRENGTH OF SQUID FIBRE-REINFORCED COMPOSITES Fiky Firmansyah; Moh. Hartono
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 2 (2025): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i2.117-125

Abstract

This study aims to determine the effect of volume fraction, fibre angle direction, and fibre length on the impact strength of squid fibre-reinforced composites. Squid fibre is a natural animal fibre that has excellent potential in the development of composite materials. The use of squid fibre as a composite reinforcement can be an alternative to reduce organic waste from marine products and produce new composite materials in sustainable manufacturing applications. The research method was conducted with quantitative experiments to determine the effect of fibre volume fraction with variations of 25%, 50%, and 75%; fibre angle direction with variations of 45° and 90°; and fibre length with variations of 20 mm, 30 mm, and 40 mm. This study used the Factorial DOE statistical data analysis method. The results showed that volume fraction and fibre length significantly affected the impact strength of the composite. The higher the volume fraction and fibre length, the higher the impact strength value of the composite. Meanwhile, the direction of fibre did not show a significant effect. The 75% volume fraction produced the highest impact strength of 0,0738 J/mm², and the 25% volume fraction produced the lowest value of 0,066 J/mm². The 45° fibre direction produced an impact strength value of 0,07098 J/mm², and the 90° fibre direction produced a value of 0,07097 J/mm². The 40 mm fibre length produced the highest impact strength value of 0,078 J/mm², and the 90° fibre direction produced a value of 0,07097 J/mm².
Analysis of Tensile Strength in a Combination of Recycled HDPE Plastic and Liquid Asphalt Achmad Bryan Baharrudin Sofan; Moh. Hartono Hartono
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.147-155

Abstract

Plastic waste reuse has gained significant attention due to its potential to reduce environmental pollution and provide alternative materials for engineering applications, particularly in the construction sector where durability and maintenance issues are common. One persistent problem in building structures is roof leakage caused by long-term exposure to rainfall, ultraviolet radiation, and extreme temperature changes, which gradually damage conventional waterproofing materials. To improve performance, materials with higher tensile strength and flexibility are needed. High-Density Polyethylene (HDPE), a thermoplastic known for its strength and durability, offers promising reinforcement when combined with liquid asphalt, while also supporting environmentally sustainable practices by reducing plastic waste. In this study, liquid asphalt was heated to 40°C and mixed with HDPE heated at 200°C, 210°C, and 220°C, then stirred for 1.5 hours until homogeneous, cooled to room temperature, and molded according to ASTM D638 for tensile testing. The results show that the 90:10 (HDPE: asphalt) composition at 200°C produced the highest tensile strength of 6.14 MPa, while the 80:20 composition at 220°C showed the lowest value of 3.86 MPa, indicating that higher HDPE content at optimal melting temperatures enhances mechanical properties and provides strong potential for use as a durable, environmentally friendly waterproofing layer in building construction.
PENGARUH VARIASI BERAT ROLLER CVT TERHADAP PERFORMA MOTOR INDIRECT INJECTION 125 CC DENGAN BAHAN BAKAR ETANOL 5% : EFFECT OF CVT ROLLER WEIGHT VARIATION ON THE PERFORMANCE OF A 125 CC INDIRECT INJECTION MOTORCYCLE USING 5% ETHANOL FUEL Rahmad Agus Salim; Reonaldo Hartono; Hadi Rahmad; Deny Setiawan
Jurnal Teknik Mesin Vol. 5 No. 1 (2026): JURNAL TEKNIK MESIN
Publisher : Mechanical Engineering Department Polinema Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/j-meeg.v5i1.8630

Abstract

The performance of automatic motorcycles is influenced by the Continuously Variable Transmission (CVT), particularly the roller component that regulates the transmission ratio. The use of alternative fuels such as 5% ethanol (E5) is also relevant to improve energy efficiency and reduce emissions. This study analyzes the effect of roller weight variation on the power and torque of a 125 cc indirect injection motorcycle fueled with E5. The independent variable is roller weight (12 g, 15 g, 18 g), while the dependent variables are power (HP) and torque, with controlled variables including motorcycle type, fuel, and dynamometer. The experiment was conducted through dynotest and analyzed descriptively. Results show that 12 g rollers provide the best initial acceleration (9.82 HP at 7500 rpm), 15 g rollers are more stable at mid–high rpm (8.57 HP at 8000 rpm), and 18 g rollers produce the highest torque (9.27 Nm at 6000 rpm).
EMPOWERING COASTAL COMMUNITIES THROUGH REVITALIZATION OF THE LEMBUNG MANGROVE ECOTOURISM AREA IN LEMBUNG VILLAGE, GALIS DISTRICT, PAMEKASAN REGENCY Ach. Muhib Zainuri; Mohamad Sinal; Moh. Hartono; Hari Kurnia Safitri
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 10 No. 2 (2026): JUNI
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v10i2.3452

Abstract

Mangrove forests play a vital role in protecting coastal areas. They regulate hydrological functions and prevent natural disasters. At the same time, these ecosystems support biodiversity, provide habitat for fish, crustaceans, and birds, and support the livelihoods of local residents. In Lembung Village, Galis District, Pamekasan Regency, community service workers from the State Polytechnic of Malang, along with the “Sabuk Hijau” tourism awareness group, are expanding mangrove revegetation efforts to strengthen their coastline while creating sustainable livelihoods through silvofishery and the introduction of fish processing technology. Silvofishery itself is a system that combines mangrove forest conservation with mangrove crab cultivation, while fish processing technology is introduced to utilize the abundant fish available locally for sale in dried form. The purpose of this community service is to implement mangrove conservation in synergy with silvofishery, thus providing ecological, social, and economic benefits for the local community, preserving natural resources, and strengthening the ecotourism-based economy of coastal communities through the introduction of fish processing technology. The results of this community service include revegetation of one hectare of mangrove forest, construction of a silvofishery area, and a fish drying machine.
Performance of Transition Metal Supported Al2O3 Coated on Honeycomb Catalysts and Its Segmentation on Exhaust Gasses Oxidation Haris Puspito Buwono; Hangga Wicaksana; Moh Hartono; Joko Waluyo; Moch. Fauzun Daroini; Ilham Taufik Muslim; Masato Machida
Automotive Experiences Vol. 7 No. 1 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.10686

Abstract

The oxidation of carbon monoxide (CO) and unburnt hydrocarbons (HC) under segmented honeycomb catalysts was investigated using actual exhaust gas mixtures from a gasoline-fueled internal combustion engine of a motorcycle. The honeycomb catalysts were prepared through a wet process, resulting in four types coated with transition metals (Cu, Cr, Fe, and Ni) supported on Al2O3. The oxidation of CO and HC was monitored using an exhaust gas analyzer across a range of air-to-fuel ratios (AFR), from lean to rich, under stationary conditions. The results demonstrate that the honeycomb catalysts effectively decreased CO and HC concentrations in the exhaust gas. Among the transition metal oxide honeycomb catalysts, Cr and Ni exhibited high CO and HC conversion rates, surpassing those observed with Cu. The average CO and HC conversion calculations, spanning from lean to rich air-to-fuel ratios, were consistent with the actual conversion rates achieved. Furthermore, the study investigated the effect of honeycomb segmentation on CO and HC conversion. Surprisingly, the catalytic performance of Cr and Ni remained high even with longer gaps in the honeycomb. Interestingly, the conversion of CO and HC over the iron oxide honeycomb catalyst increased as the gap in the honeycomb became longer. This is likely due to an increase in the gap size and enhanced re-mixing of reactants (CO, HC, and O2) caused by recirculation. Thus, this study provides valuable elucidation on the potential application of segmented honeycomb catalysts for reducing CO and HC emissions in exhaust gases.
Pemberdayaan Kambing Peternak melalui Pembuatan Kandang yang Bersih dan Sehat di Dusun Tanjung, Kecamatan Singosari, Kabupaten Malang Kris Witono; Lisa Agustriyana; Agus Dani; Moh. Hartono; Talifatim Machfuroh
I-Com: Indonesian Community Journal Vol 5 No 4 (2025): I-Com: Indonesian Community Journal (Desember 2025)
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/i-com.v5i4.8227

Abstract

Dusun Tanjung, Desa Banjararum, Kecamatan Singosari, Kabupaten Malang, memiliki potensi besar dalam sektor peternakan kambing karena kondisi geografis dan iklim yang mendukung. Namun, peternak masih menghadapi kendala seperti kandang yang kurang layak, minimnya pengetahuan manajemen kandang, dan rendahnya produktivitas ternak. Kegiatan Pengabdian kepada Masyarakat (PPM) oleh tim Politeknik Negeri Malang bertujuan memberdayakan peternak melalui pembangunan kandang bersih dan sehat serta peningkatan kemampuan pengelolaan kandang. Pelaksanaan dilakukan melalui sosialisasi, pembangunan kandang, pendampingan, dan evaluasi hasil. Hasil kegiatan menunjukkan peningkatan pemahaman peternak tentang pentingnya fasilitas kandang yang baik, terutama pada aspek ventilasi, kebersihan, dan sistem pembuangan limbah. Selain itu, kegiatan ini memperkuat kolaborasi antara akademisi dan peternak. Ke depan, akan dikembangkan pengolahan limbah ternak menjadi pupuk organik melalui pelatihan teknologi sederhana guna mendukung keberlanjutan peternakan di Dusun Tanjung.
Co-Authors Ach. Muhib Zainuri Achmad Bryan Baharrudin Sofan Agus Dani Akbar, Fadilah Ali Djamhuri AM Mufarrih Amrullah, Utsman Syah Anggit Murdani Bagus Wahyudi Deny Setiawan Dr. Dra. Utami Retno Pudjowati, M.Si Elief Yuniarti Elief Yuniarti, Elief Fatkhur Rohman Febrian Akbar Pratama Fiky Firmansyah Hadi Rahmad Hangga Wicaksana Hari Kurnia Safitri Haris Puspito Buwono Ilham Taufik Muslim Ismoyo, Ramadhan Araya Joko Waluyo Kris Witono Lisa Agustriyana Masato Machida Moch. Fauzun Daroini Moh. Hafiyusholeh Moh. Nasir Hariyanto Mohamad Sinal Monasari, Ratna Mutia Lina Dewi Nanang Qosim Pipit Wahyu Nugroho Pondi Udianto Pradana, Prihadi Mulya Prihadi Mulya Pradana Pudjowati, Utami Retno Purwanto, Raden Edy Rahmad Agus Salim Robby Ridwan Samsul Hadi Subagiyo Subagiyo Talifatim Machfuroh Utami Pudjowati Widjajanti, Kristina Widodo, Yuniarto Agus Yoyok Heru P.I Yoyok Heru P.I, Yoyok Yuniar Farida