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All Journal Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) JURNAL VOKASI TEKNIK (JUVOTEK)
Karti Karti
Politeknik Teknologi Kimia Industri Medan
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Analisis Parameter Kinerja Mesin Granulator dalam Proses Produksi Pupuk NPK Nurlianna Tarigan; Karti Karti; Nelson Silitonga; Immanuel Yorlando Simanjuntak
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 5 No 1 (2026): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v5i1.292

Abstract

The process of making NPK fertilizer in granular form is greatly influenced by the performance of the granulator machine used. The granulator plays an important role in producing fertilizer granules with a consistent size, hardness, and homogeneity to meet quality standards and facilitate distribution and field application. This study aims to analyze the performance parameters that affect the efficiency of granule formation in NPK fertilizer and the influence of the granulator on the granule formation process. The research method involved direct observation of the production process and testing the quality of the granules, including particle size distribution, mechanical hardness, and frictional resistance. The results of the study show that, at a granulator rotation speed of 21 rpm and a torque of 28.5 N ยท m, the NPK fertilizer manufacturing process produces an effective capacity of 24,384 kg/hour. And shows that the more optimal the control of the work parameter settings, the higher the process efficiency and the quality of the NPK fertilizer granules produced.
Besarnya Gaya Gerak Listrik (GGL) Induksi Yang Dihasilkan Oleh Generator Sebagai Pembangkit Listrik Untuk Kebutuhan Pabrik Di PT. Z Karti Karti
JURNAL VOKASI TEKNIK Vol 1 No 02 (2023): JURNAL VOKASI TEKNIK (JUVOTEK)
Publisher : CV MEDAN TEKNO SOLUSI

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A generator is a device capable of producing electric current. one type of generator is an alternating current generator. Alternating current generators function to convert mechanical power into alternating current electric power. This tool is often used in industry to drive several machines that use electric current as a driving source. The method used is the interview and observation method where questions and answers are asked directly with employees or field supervisors about the power generated by the generator used in the factory and direct observation in the field of the object to be studied. Because of the potential difference between points a and b so that electricity from a flows to b so that a physical phenomenon called electromotive force (GGL) induction occurs, where electromotive force is the force acting on electric charges moving in an electric field or magnetic field. This force refers to the force or impetus that affects the movement of electric charges in a particular medium. From the results of the calculation, the results of the induced electromotive force (GGL) generated by the generator are: E = 342,51 V. And for the results of the calculations obtained the results of the Emax electromotive force (GGL) induction generated by the generator, namely: E_max = 638,06 V. There are several factors that affect electromotive force including: The speed of change in the magnetic field, the number of turns, and the strength of the magnet.
ANALISA PENGUJIAN MEKANIK TERHADAP VARIASI PENGGUNAAN BENTONITE DALAM PENGECORAN PINTU RUANG BAKAR: STUDI EKSPERIMEN DI PT. XYZ Herry Darmadi; Muhammad Fatih Abdillah; Agustin Nurya Savitri; Karti Karti; Dian Kurnia; Murhaban Murhaban
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 11, No 2 (2025): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v11i2.13836

Abstract

The Combustion chamber door is a component of the boiler that functions to open and close the combustion chamber. At PT. XYZ, the combustion chamber door is made through the melting and metal casting method. In the metal casting method using a sand mold, an auxiliary substance in the form of bentonite is needed which functions to glue the sand mold and strengthen the mold so that it is not easily destroyed when receiving heat from the molten metal lava. The bentonite variations used in this study are 8%, 10%, and 12%. Mechanical testing (impact and hardness) is the most effective test to determine the description of the mechanical properties of a material. The purpose of this study is to determine the magnitude of the impact strength of the metal casting results in the manufacture of combustion chamber doors with different bentonite variations impact testing with the Charpy Impact Test method and the hardness value of the metal casting results in the manufacture of combustion chamber doors with different bentonite variations through hardness testing with the Rockwell Hardness Test method. In the impact test, the results of the impact strength analysis of the 8% bentonite variation were 0.1655 Kg.m/mm2, the 10% bentonite variation was 0.2119 Kg.m/mm2, and the 12% bentonite variation was 0.2555 Kg.m/mm2. In the hardness test, the results of the hardness analysis on the 8% bentonite variation were 104,7 HRC, the 10% bentonite variation was 92,1 HRC, and the 12% bentonite variation was 81,8 HRC.
Tindakan Corrective Maintenance pada Penggantian Poros Elektro Motor yang Patah Akibat Beban Berlebih di Mesin Separator PT. Hutahaean Karti Karti; Geo Peterson Nainggolan
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 3 No 3 (2024): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v3i3.159

Abstract

This research discusses the replacement of a broken motor shaft due to overload as a Corrective Maintenance action on the separator unit at PT. Hutahaean, Tapioca Factory. The objective of this research is to understand the Standard Operating Procedure (SOP) for replacing a broken motor shaft and to apply preventive steps to avoid further damage to the electric motor in the separator unit. The electric motor plays a crucial role in driving the separator machine, especially in the separation process of tapioca starch. Overloading led to the breakage of the motor shaft, disrupting the production flow. This study demonstrates that effective Corrective Maintenance can restore the machine's optimal function and reduce production downtime. The findings also highlight the importance of routine maintenance of machine components to prevent future severe damages.
Co-Authors Agustin Nurya Savitri Dian Kurnia Geo Peterson Nainggolan Herry Darmadi Immanuel Yorlando Simanjuntak Muhammad Fatih Abdillah Murhaban Nelson Silitonga Nurlianna Tarigan