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Pramono, Agus Edy
Politeknik Negeri Jakarta
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Sifat Listrik komposit yang difabrikasi dari carbon-phenol formaldehyde Pramono, Agus Edy; Patrick, Yohannes PatrickR; Belyamin; Indayaningsih, Nanik Indayaningsih
Recent in Engineering Science and Technology Vol. 1 No. 04 (2023): RiESTech Volume 01 No. 04 Years 2023
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v1i04.29

Abstract

This research aimed to create composites of carbon-phenol formaldehyde (PF) using carbonated rice husks as fillers. The composites showed electrical conductivity that increased with carbon content and decreased electrical resistance. The composites were evaluated for their physical, and electrical properties. The results showed that increasing PF content resulted in higher density but lower porosity, making the composites heavier. Specimens with 80% carbon weight and 20% PF weight produce an electrical conductivity of 0.055 [S/cm], while those with 70% carbon weight and 30% PF weight produce an electrical conductivity of 0.039 [S/cm]. Specimens with 60% carbon weight and 40% PF weight generate an electrical conductivity of 0.013 [S/cm].
Engineering and Process of Investment Casting for Pump Impellers Pramono, Agus Edy; Dermawan, Arif
Recent in Engineering Science and Technology Vol. 1 No. 04 (2023): RiESTech Volume 01 No. 04 Years 2023
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v1i04.36

Abstract

This article explains the pump impeller fabrication process using the investment casting method as an alternative to sand casting. The process aims to achieve precise dimensions, thereby reducing the need for additional machining processes. The process begins with creating a metal pattern. The metal pattern is conducted through machining with dimensional additions. The dimensions are determined by summing up the dimensional sizes, considering SS316L material shrinkage (2.5~3.5%), wax shrinkage (1%), and machining (5mm). The further process is wax injection to create wax patterns, the making of gating system, and ceramic sintering molding. The wax patterns are made separately for each part of the impeller, and then assembled into a complete wax pattern that matches the impeller's geometry and includes the gating system. The wax patterns undergo repeated dipping into slurry and stucco solutions, forming a thick ceramic layer around the wax impeller patterns. After melting the wax from the ceramic mold, cavities are left according to the impeller's geometry. Sintering the ceramic mold impeller at 1000°C forms a hard ceramic mold with cavities ready to receive the molten metal. Once the molten metal solidifies and is removed from the ceramic mold, the casting impeller is ready for further machining processes.
Design and construction of the 3D printer two-stand, controlled Arduino Mega 2560 R3 CH340G Pramono, Agus Edy; Fadhila, Nazhmi; Andareska, Rafi Pradaya; Noto, Feri Nugroho Adi; Setiyadi, Iman; Zuhri, Aminudin; Patrik, Yohanes
Recent in Engineering Science and Technology Vol. 2 No. 03 (2024): RiESTech Volume 02 No. 03 Years 2024
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v2i03.72

Abstract

The need to show the geometry of a workpiece of a component or system on a certain scale and three-dimensionality can be realized through a three-dimensional printing press. This paper explains the techniques and how to design a three-dimensional printing machine and test product printing. The three-dimensional printing machine has been successfully created and built, and the printing test shows the results corresponding to the machine's specifications. The design and fabrication of printer 3D printing machine for PLA filament thermoplastic material has been successfully done. This machine implements an Arduino Mega 2560 R3 CH340G-based control system. The specifications of the 3D printing machine are as follows: Layer height = 0.2 [mm]; Infill density = 20%; Maximum Printing temperature = 240°C; Build plate temperature = 60°C; Print speed = 60 [mm/s]. The input comes from an AC power source that is converted to DC with an Input Power supply of 12 Volt 20 A. The machine has been tested, and parts with geometry are produced according to the machine's specifications.
Effect of Rheological on the Physical and Electrical Properties of Extruded Micro Carbon -LLDPE Composites Pramono, Agus Edy; Zuhri , Aminudin; Setyadi , Iman; Indayaningsih , Nanik
Recent in Engineering Science and Technology Vol. 2 No. 04 (2024): RiESTech Volume 02 No. 04 Years 2024
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v2i04.77

Abstract

This study focuses on formulating and optimizing a conductive polymer composite (CPC) material tailored for electromechanical applications. Linear Low-Density Polyethylene (LLDPE) polymer and micro carbon particles derived from rice husk were compounded using a hot compaction process and melt blended through a single-screw extrusion machine. A mix of 50% loading of microcarbon particles was used in this research. It was determined that the experiment was successfully conducted, resulting in a stabilized density of approximately 1 g/cm³. The research demonstrates how the prototype Extruder Head effectively stabilizes the density of composites. Electrical conductivity demonstrated a notable increase in conductivity toward higher density. These findings underscore the successful development of a CPC material with improved electrical conductivity, making it a highly suitable tool for high carbon-loading composite material.
ANALISIS RISIKO MUSCULOSKELETAL DISORDERS (MSDs) TERHADAP PROSES MATERIAL HANDLING PADA OPERATOR PENGOLAH LIMBAH MENGGUNAKAN METODE RAPID ENTIRE BODY ASSESMENT Genia Auberta; Agus Edy Pramono
Recent in Engineering Science and Technology Vol. 2 No. 04 (2024): RiESTech Volume 02 No. 04 Years 2024
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v2i04.81

Abstract

: Businesses should never stop trying to include every employee in their operations and never skimp on safety precautions. One of the safety methods in the worker-centered approach implementation is the significance of ergonomics. Typically, material handling phases in production processes include physical labor that demands a lot of operator effort. Handling objects by hand raises the possibility of workplace mishaps, which can lead to musculoskeletal injuries. This study focuses on the different labor postures used for gathering, transferring, and positioning waste as well as the manual handling of waste items up to the shredding area. This study evaluates work postures that may result in symptoms of musculoskeletal diseases using the Rapid Entire Body Assessment (REBA) technique. There are three steps in this process. Prior to lowering the waste bucket to the designated place, gather the trash first, then hoist and carry it till it reaches the mechanical area. Three grades 9, 2, and 6 were obtained from the analysis utilizing the REBA (Rapid Entire Body Assessment) approach. Based on these findings, the first stage has to be improved right away. Thus, in order to meet the improvement objective, we created a telescopic reach that enables employees to change the height a device that aids in bettering workers' posture while picking up trash.
Bahasa Inggris Pramono, Agus Edy; Setyadi, Iman; Zuhri, Aminudin; Dewi, Anissa Puspa; Indayaningsih, Nanik
Recent in Engineering Science and Technology Vol. 3 No. 02 (2025): RiESTech Volume 3 No. 02 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i2.95

Abstract

This paper compares the electrical conductivity of LLDPE-carbon composite materials, LLDPE-carbon-aluminum composites, and LLDPE-carbon-copper composites. Doping with aluminum (Al) and copper (Cu) metal powders influences electrical conductivity in carbon-based polymer composite materials. Adding metal powders as secondary fillers to a mixture of conductive carbon powders and LLDPE can decrease electrical conductivity. This is due to the agglomeration or clustering of metal powders within the polymer matrix, which disrupts conductive pathways and diminishes the efficiency of electrical charge transfer. The impact of filler type and quantity on electrical conductivity in composite materials was examined, and the findings revealed that factors such as the filler's amount, shape, and dispersal significantly affect the composite's electrical resistance properties. Increasing the amount of metal powder filler raises the composite's viscosity, reducing adhesion between the metal and polymer fillers while promoting metal-to-metal contacts.
Design of a Fertilizer Lifting Crane for the Canycom S25A Fertilizer Spreader Unit Sukma, Irwan; Agus Edy Pramono
Recent in Engineering Science and Technology Vol. 3 No. 04 (2025): RiESTech Volume 03 No. 04 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i04.101

Abstract

Manual lifting of fertilizer bags in plantation operations often leads to musculoskeletal disorders (MSDs) among workers due to repetitive, high-load, and ergonomically poor movements. This study aims to design an ergonomic fertilizer lifting crane integrated into the Canycom S25A Fertilizer Spreader with a 650-liter hopper to reduce physical strain and improve operational efficiency. A hydraulic crane system was designed with dual-segment arms, four lifting hooks, and two hydraulic cylinders, actuated via the unit’s PTO engine. Ergonomic evaluation was performed using the REBA assessment tools. The simulation results indicated that the maximum stress on critical components was within safe limits, with a factor of safety above 1.5. Postural analysis showed a significant improvement, where REBA scores decreased from 12 to 2 after the crane was introduced. The design offers a reliable, low-cost, and easily manufactured solution that enhances worker safety, reduces ergonomic risk, and increases productivity in fertilizer loading processes, especially in rugged field environments. The crane can be adopted in various agricultural applications where safe material handling is essential. Keywords: Ergonomics, Fertilizer Lifting Crane, Hydraulic system, REBA, Agricultural Mechanization
Co-Authors Adhi, Pribadi Mumpuni Ahmad Maksum Ainun Nidhar, Ainun Aminudin Zuhri Andareska, Rafi Pradaya Arif Dermawan Arnanda, Rachmat Belyamin Belyamin Belyamin Devi Handaya Dewi, Anissa Puspa Dewi, Dhora Fadhila, Nazhmi Genia Auberta Iman Setyadi Indayaningsih , Nanik Indayaningsih, Nanik Indayaningsih Isnanda Nuriskasari Iwan Susanto Kamal, Dianta Mustofa Lingga Sakti Nanik Indayaningsih Noor Hidayati Noto, Feri Nugroho Adi Patrick, Yohannes Patrick, Yohannes PatrickR Patrik, Yohanes Paulus Sukusno Rahman, Haolia Ramadhan, Mochammad Tendi Noer Ridlwan, Hasvienda Mohammad Sakti, Lingga Setiyadi, Iman Setyadi , Iman Setyadi, Iman Subyakto Subyakto Sukma, Irwan Tatun Hayatun Nufus Vika Rizkia Wermasaubun, Hendrikus Yohanes, Alvian Zuhri , Aminudin Zuhri, Aminudin