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All Journal Jurnal Rekayasa Mesin JMPM (Jurnal Material dan Proses Manufaktur) JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Techne : Jurnal Ilmiah Elektroteknika Jurnal FATEKSA : Jurnal Teknologi dan Rekayasa Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin JURNAL CRANKSHAFT International Journal of Applied Sciences and Smart Technologies Jurnal Tekstil: Jurnal Keilmuan dan Aplikasi Bidang Tekstil dan Manajemen lndustri
Perwita Kurniawan
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Perancangan dan Analisis Mesin Pencacah untuk Limbah Hasil Purging dengan Menggunakan Metode Computer Aided Engineering Mikail Tito Rendo Prawara; Perwita Kurniawan; Aditya Nugraha; Agustinus Wisnu Setiawan
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 13 No. 2 (2023): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/teknobiz.v13i2.5288

Abstract

Plastik merupakan salah satu material yang tidak bisa dipisahkan dari kehidupan manusia karena mudah dibentuk, praktis, ringan, tidak berkarat, dan tentu saja lebih ekonomis. Plastik banyak digunakan untuk produk makanan, bidang otomotif, bidang farmasi, bidang pertanian, bidang konstruksi, bidang elektronika, bidang industri hingga kosmetika. Salah satu proses yang umum digunakan yaitu proses injection molding, proses yang kurang sempurna akan mengakibatkan cacat atau kegagalan pada produk. Untuk mengurangi hasil cacat produk maka salah satu proses yang digunakan adalah proses purging pada barrel. Limbah hasil purging atau biasa disebut avalan belum dapat diolah secara maksimal seperti limbah cacat produk dan runner. Penelitian ini menghasilkan sebuah rancangan alat atau mesin pencacah untuk mencacah limbah hasil purging pada mesin injeksi molding. Mekanisme pencacahan yang digunakan menggunakan tipe gunting atau shear. Hasil analisis menunjukan pada bagian tengah poros komponen tersebut memenuhi syarat keamanan, diindikasikan dengan nilai tegangan yang terjadi akibat pembebanan sebesar 8,885.10-10 N/m² hingga 7,283.10-3 N/m², nilai tersebut jauh dibawah tegangan maksimal ijin / yield strength sebesar 5,650e+02 N/mm². Sedangkan untuk bilah pisau memiliki nilai tegangan yang terjadi akibat pembebanan sebesar 7,656.10-5 N/m² hingga 7,627.10-2 N/m², nilai tersebut jauh dibawah tegangan maksimal ijin / yield strength sebesar 2,000.102 N/mm².
OPTIMASI PARAMETER INJECTION MOLDING PADA PEMBUATAN PRODUK BOX HEXA OIL PASTEL 72 SET UNTUK MENGATASI DEFECT BENDING PRODUK Adi , A.Y. Novi Misgi Prabowo; Hutama , Adhi Setya; Kurniawan , Perwita
Jurnal FATEKSA : Jurnal Teknologi dan Rekayasa Vol. 10 No. 1 (2025): Jurnal FATEKSA : Jurnal Teknologi dan Rekayasa
Publisher : Fakultas Teknologi dan Rekayasa

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Abstract

Produk Plastic Box Hexa Oil Pastel 72 Set Faber-Castell yang memiliki dimensi 604,8 mm x 233,9 mm x 26,0 mm dengan acuan berat produk 327 ± 5 gram. Berdasarkan data yang didapatkan dari hasil observasi terdapat masalah yang terjadi dalam proses produksi produk Plastic Box Hexa Oil Pastel 72 Set Faber-Castell, yaitu reject rate cukup tinggi dengan nilai 8,25% di bulan April 2023, dimana standart batasan maksimal reject rate di produksi adalah 5%.Permasalahan yang terjadi karena belum adanya standarisasi untuk parameter injeksi saat proses produksi sehingga parameter injeksi yang disetting menjadi kurang optimal. Akibat dari kurang optimalnya parameter injeksi menyebabkan terjadinya defect product dan tidak tercapainya berat produk yang diminta yaitu 327 ± 5 gram. Defect produk yang terjadi pada proses produksi produk Plastic Box Hexa Oil Pastel 72 Set Faber-Castell di bulan April antara lain defect bending sebesar 5,4%, discolour sebesar 1,2%, dan blackdot sebesar 1,7%. Penelitian berfokus untuk mengatasi permasalahan defect bending produk dimana standart flatness yang diminta adalah maksimal bending 0,2 mm dan tercapainya berat produk sesuai standart 327 ± 5 gram yang dapat diatasi salah satunya dengan optimasi parameter proses injeksi. Pengoptimalan parameter injeksi dapat dilakukan dengan kombinasi antar parameteryang memiliki pengaruh terhadap defect produk yaitu holding time, holding pressure, injection speed dan melt. Berdasarkan penelitian pengoptimalan parameter proses injection molding dalam pembuatan Produk Plastic Box Hexa 72 Set Faber-Castell menggunakan metode taguchi dan ANOVA dengan karakteristik smaller is better, didapatkan kombinasi parameter sebagai berikut : holding time selama 6 detik, holding pressure 60 bar, Injection Speed sebesar 55%, dan Melt Temperature sebesar 240 °C.
The Effect of Injection Parameters on Warpage, Shrinkage, and Tensile Strength of Polypropylene Composites Andre Bawono, Julius; Budiarto; Kurniawan, Perwita
Jurnal Rekayasa Mesin Vol. 20 No. 2 (2025): Volume 20, Nomor 2, Agustus 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i2.6573

Abstract

Polypropylene composite material is an environmentally friendly material when compared to other polymer materials because the composition of polypropylene is only 76% and the remaining 24% is limestone. The use of this composite material is to reduce dependence on the use of Acrylonitrile Butadiene Styrene (ABS) and Acrylic Styrene (AS) resins because both materials are difficult to decompose and recycle. The "base" product made from this material has a warpage defect that causes a gap effect when the product is installed with other components. Therefore, a study was conducted on the effect of mold temperature and holding pressure on warpage defects, shrinkage, tensile strength and surface morphology. This study used an experimental method with variations in mold temperature used were 20°C, 40°C, and 60°C, variations in holding pressure used were 70 bar, 110 bar, and 150 bar. Testing was carried out by measuring dimensions to determine warpage, shrinkage percentage, measuring tensile strength and observing surface structure. The warpage value decreases by 29% at high mold temperatures and increases by 84% at high holding pressure. The shrinkage percentage decreases with increasing mold temperature and holding pressure in the transverse direction by 7.14%-9.52% at constant pressure and 25%-26.29% at constant temperature, in the longitudinal direction by 1.27%-6.21% at constant pressure and 13.92%-17.95% at constant temperature. The optimal parameters to obtain the highest tensile strength of 26.77 MPa are at a mold temperature of 60°C and a holding pressure of 110 bar.
Mechanical Properties and Homogenous Analysis of Semirigid Polyurethane Foam used in Headliner Roof Top Manufacturing Process Nugroho, Adi; Antonius Fajar Bisma; Perwita Kurniawan
Jurnal Rekayasa Mesin Vol. 20 No. 2 (2025): Volume 20, Nomor 2, Agustus 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i2.6575

Abstract

In the automotive industry with four wheels or more, polyurethane is used as the main material in making roof top headliners. The process of making roof top headliners often experiences product defects, namely breaks (cracks or fractures). The study was conducted to analyze the homogeneity of mechanical characteristics at various positions in one block of polyurethane foam that had been cut into sheets with a thickness of 8 mm. Samples were taken representing vertical and horizontal positions and tested using the true experiment spatial sampling method. From this study, it was found that the density in one block of semi-rigid polyurethane foam was not homogeneous. There were differences in density in the upper, middle and lower materials in zones 1 to 9. The density value is directly proportional to the bending strength value and inversely proportional to the elongation value. In the zone where the elongation value is low, there is a risk of product defects in the form of fractures if the product's formability strength simulated using NX software is higher than 18%.
MODIFICATION OF THE INDONESIAN GROWING BUCKET COVER DESIGN ON THE THICKNESS OF THE PIPE PLACE TO REDUCE WARPAGE USING SOLIDWORKS PLASTICS SOFTWARE Kurniawan, Perwita; Suprabo, Cornelius Tyas Lintang; Silvaro, Stefanus Bima; Hutama, Adhi Setya
Jurnal Dinamika Vokasional Teknik Mesin Vol. 9 No. 2 (2024)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v9i2.77238

Abstract

Cover Indonesian Growing Bucket has a product defect problem in the form of a warpage caused by a design considered good. There was a discrepancy in the parameter settings with the initial analysis results, resulting in a difference in cooling time of 2.3 s from the original 3.9 s. This happened because parameter changes aimed to reduce warpage cycle time from the original 25.4 s to 23.8 s. Based on the problems, design modifications and analysis were carried out using Solidworks Plastics software. The design modification and analysis process was carried out using the Experiment of Analysis method, which was carried out by modifying the thickness of the part, which resulted in a warpage. The analysis was carried out to obtain optimal thickness results with the smallest cooling time gap. Modifications and design analysis are done by making three (3) alternative thicknesses for the pipe clamp section. The best modification of the three (3) alternatives made will be used as a reference basis for making material cost calculation data. From the results of design modifications and analysis, it was found that the design thickness changed to 1.5 mm. Based on the results of this analysis, alternative options are produced, which are then used as a reference in design modifications so that the resulting fill time and cycle time are more optimal.
Analisis Kegagalan Mesin Produksi Rokok Cigarillos dengan Metode FMEA Hutama, Adhi Setya; Nugroho, Th. Adi; Kurniawan, Perwita; Aji, Bayu Crisna; Nuriyah, Sinta
JURNAL CRANKSHAFT Vol 6, No 3 (2023): Jurnal Crankshaft Vol.6 No.3 (2023)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/crankshaft.v6i3.11255

Abstract

Industri Hasil Tembakau menjadi salah satu sektor manufaktur nasional yang strategis, berkontribusi besar dan berdampak luas terhadap pembangunan bangsa. Salah satu industri yang bergerak dibidang pengolahan hasil tembakau adalah PT. XYZ, dengan produknya adalah rokok cigarillos. Mesin produksi pada produk ini terdiri dari gluing dan  cutting. Hasil wawancara yang dilakukan peneliti selama bulan agustus – oktober 2022 ditemukan adanya cacat produk berupa seperti broken (873 pcs) dan wrapper loose parah (14.521), dengan total prosentase rata rata 30%, melebihi standar yang ditetapkan perusahaan (15%). Hal ini imbas dari kondisi mesin yang tidak terawat (roll finger dan vacuum roll kotor menyebabkan wrapper loose, dan bunker yang bermasalah menyebabkan rokok patah). Metode Failure Mode and Effect Analysis (FMEA) digunakan dalam studi ini untuk mengidentifikasi risiko kegagalan, mendapatkan nilai Risk Priority Number  (RPN) dan memberikan usulan perbaikan untuk produksi selanjutnya. Studi ini berhasil menemukan penyebab kegagalan produksi yaitu roller tidak bersinggungan dengan belt (Nilai RPN adalah 45). Rekomendasi yang diberikan kepada perusahaan adalah modifikasi dudukan roll belt dengan memperbesar radius atas pada dudukan belt.
Optimization of Spot Welding Parameters on Shear Tensile Strength of 0.9 mm SPCC Material using the Taguchi Methods Samodra, Yudha; Hutama, Adhi Setya; Kurniawan, Perwita; Hayu, Winastwan Sista; Nugroho, Th. Adi
Jurnal Rekayasa Mesin Vol. 20 No. 3 (2025): Volume 20, Nomor 3, Desember 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i3.7032

Abstract

Resistance spot welding (RSW) is one of the most widely used joining methods for thin metal sheets in the manufacturing industry, particularly for low-carbon steel materials such as SPCC. At PT. XYZ, inconsistencies in weld quality have been observed due to the absence of optimized process parameters. This study aims to analyze the influence of spot welding parameters—welding current, welding time, and holding time—on the shear tensile strength of 0.9 mm SPCC material. The Taguchi method with an L9 orthogonal array experimental design was employed to identify the optimal parameter combination. Shear tensile testing was conducted in accordance with ISO 14273:2016, while data analysis was performed using the Signal-to-Noise (S/N) ratio with the "larger is better" criterion and Analysis of Variance (ANOVA).The results indicate that welding current is the most dominant factor, contributing 71.12% to the variation in shear tensile strength, followed by welding time at 21.11%, while holding time has a relatively minor contribution of 5.66%. The optimal condition was achieved at 34 kA (welding current), 15 cycles (welding time), and 10 cycles (holding time), yielding a maximum shear tensile strength of 572.06 kgf and an S/N ratio of 54.00 dB. This study demonstrates that the Taguchi method is effective for optimizing spot welding parameters with a minimal number of experiments, providing a reliable technical guideline to improve the quality and consistency of production processes in the manufacturing industry.
Pengaruh Parameter Proses Thermoforming Terhadap Distribusi Ketebalan dan Akurasi Dimensi Produk Budiyantoro, Cahyo; Kurniawan, Perwita
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 7 No. 1 (2023): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v7i1.18717

Abstract

This study examines the influence of thermoforming process parameters, namely heating time, pre-stretching degree, and vacuum evacuation rate, on the distribution of wall thickness and dimensional accuracy of the product. The research involved a series of experiments with three variations of these process parameters. Heating time was varied at 30, 35, and 40 seconds, pre-stretching degree ranged from 0.1 to 0.3, and evacuation rates were set at 6 mm/s, 8 mm/s, and 10 mm/s, respectively. The results showed that the parameters capable of minimizing the radius at the specimen's corners were a vacuum evacuation rate of 10 mm/s, a heating time of 40 seconds, and a pre-stretching degree of 0.1 Vst. The findings suggest that the vacuum forming products can be optimized by combining a high vacuum evacuation rate, longer heating time, and low pre-stretching degree.
Analisis Pengaruh Parameter Hardening terhadap Distorsi Spesimen CT58 dengan Metode Taguchi Kurniawan, Perwita; Sartoyo, Millenino Bergas; Nugraha, Aditya; Nugroho, Adi
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 7 No. 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v7i2.20073

Abstract

This research discusses the problem of distortion of cigarette engine components after the hardening process. This research focuses on changes in the dimensions of the hole diameter, gap width, and flatness of the components. The austenite temperature, quench medium, and tempering temperature were examined to determine their effect on distortion. Components are made of machine steel group S45C equivalent to AISI 1045. This study used a specimen named CT58 with Austenite temperature variations of 820 ̊C 840 ̊C 860 ̊C, then variations of oil, oil + water, and water quenching media and Tempering temperature variations of 200 ̊C, 250 ̊C, and 300 ̊C. This research used the Design of Experiment, followed by statistical analysis using the Minitab application. The results showed that the distortion in the CT58 specimen was most affected by the Austenite temperature, followed by the Quench medium and Tempering temperature. The austenite temperature of 820°C, the oil quench medium, and the tempering temperature of 250°C are the best hardening parameters for the Inner Diameter aspect. The austenite temperature of 820°C, oil quench media, and tempering temperature of 250°C are the best setting parameters for the Gap Width aspect. The austenite temperature of 820°C, oil quench media, and tempering temperature of 250°C are the best setting parameters for the Flatness aspect
Co-Authors Adhi Setya Hutama Adi , A.Y. Novi Misgi Prabowo Adi Nugroho Aditya Nugraha ADITYA NUGRAHA Agustinus Wisnu Setiawan Aji, Bayu Crisna Andre Bawono, Julius Andrean Van Halen Antonius Fajar Bisma Budiantoro, Cahyo Budiarto Budiyantoro, Cahyo Cahyo Budiantoro Hayu, Winastwan Sista Ivanda Bintang Cahya Putra Mikail Tito Rendo Prawara Nugroho, Th. Adi Nuriyah, Sinta Oscar Pambudi Prakosa Rinanto, Andhy Rusmana, Gregorius Bian Sartoyo, Millenino Bergas Silvaro, Stefanus Bima Suprabo, Cornelius Tyas Lintang TH Adi Nugroho Tri Hannanto Saputra Yudha Samodra