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All Journal STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin
Kristianta, FX
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ANALISIS STRUKTUR RANGKA MESIN VACUM FORMING MENGGUNAKAN FINITE ELEMENT ANALYSIS Jamil, Farur; Asrofi, Muhammad; Sidartawan, Robertus; Triono, Agus; Sholahudin, Imam; Kristianta, FX; Nurdiansyah, Haidzar
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 2 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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The SME sector is the source of all aspects related to the pattern of human life, starting from the clothing, food and housing sectors. In the process of forming the packaging there are several methods used, the method that is often used is thermoforming. One of the simplest thermoforming methods is vacuum forming. In this research, research will be carried out to identify the strength of the frame structure of a vacuum forming machine with ST 37 iron material. This research focuses on vacuum forming machine frames. The weight of each component includes a 5.2 Kg Box Heater, 7.2 Kg Vacuum Chamber and 3.2 Kg Vacuum. The results obtained from this study are that the vacuum forming machine frame is able to withstand other machine frames. Where the results of the simulation and analytical calculations are not much different. Visualization of the loading of the vacuum forming machine can be seen immediately where the location of the critical load during the simulation is the Maximum Normal Stress of 1.1689 Mpa. The Minimum Normal Stress is -0.88281 and the shear stress is 0.3865 Mpa. And for the safety factor of this simulation is 31.44. The frame of the vacuum forming machine holds the load of the entire component.
PENGARUH PREKURSOR DAN ARUS TERHADAP PELAPISAN ZINC OXIDE PADA SERAT KARBON MENGGUNAKAN METODE ELECTROCHEMICAL Dinata, Fadea; Kristianta, FX; Trifiananto, M; Sidartawan, Robertus; Dwiqoryah, Rika
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 1 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Coating is a chemical process that is useful for changing the physical or mechanical properties of the material to be coated. Electrochemical is a coating technology that utilizes chemical processes assisted by electrical energy. The layers that are often grown today are layers that have semiconductor properties. One of the semiconductor layers is ZnO which is often used as a sensor or piezoelectric. This research aims to determine the effect of variations in precursor and current on the results of ZnO coating on carbon fiber used for pulse sensors. The research method was carried out experimentally using a DC Power Supply, USB Oscilloscope and Zinc Acetate Dihydrate precursor solution. The precursor variations in this study were 0.5 gr/50mL and 1.0 gr/50mL, while the current variations were 0.8 A, 1.0 A and 1.2 A. The results showed that the voltage from the pulse sensor was the most high at a precursor of 1.0 gr/50 mL with a current of 1.2 A. It can be concluded that the thickness and structure of the ZnO layer greatly influences the performance of the pulse sensor.
PENGARUH VARIASI SUHU SIKLUS THERMAL TERHADAP KEKUATAN BENDING KOMPOSIT UNSATURATED POLYESTER SERAT KELAPA SEMBADA, IQBAL VARIAN; Hermawan, Yuni; listyadi S, Digdo; Sholahudin, Imam; Kristianta, FX
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Composite is one of the materials used in engineering field. This is because composites have strong properties, light weight, corrosion resistance, economical and so on. One of coconut fiber composite composite. Coco fiber in Indonesia is still not utilized to the maximum to increase its economic value. One application of coconut fiber composite usage is for wood replacement wall. This study aims to determine the effect of repeated thermal load on the bending strength of the composite. In this research the material used is coconut fiber coir random orientation direction as reinforced and unsaturated polyester as matrix with fiber volume fraction 5%. The production method used is press hand lay up. Temperature variations are 30oC, 50oC, 70oC, and 90oC with 10 repetitions. Bending test is done with ASTM D790 standard reference. The result of this research shows the highest bending strength in composite with thermal temperature of 30o C equal to 39,68 MPa. While the lowest bending strength occurred at 90°C thermal temperature of 24.60 MPa. From result of research indicate that unsaturated polyester when given heat load continuously will decrease bending strength because debonding failure in matrix.
Analisis Performa Mesin Pengayak Pasir Zeolit Jenis Rotary Dengan Variasi Sudut Kemiringan & Variasi Kecepatan Putaran Wildan, Muhammad; Hermawan, Yuni; Nashrullah, Muhammad Dimyati; Syuhri, Ahmad; Sidartawan, Robertus; Kristianta, FX
STATOR: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 1 (2025): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Pengayakan merupakan proses pengelompokan suatu butiran yang akan dipisahkan menjadisatu atau beberapa kelompok. Salah satu jenis pasir yang membutuhkan sebuah prosespengayakan ialah pasir zeolit. Mesin pengayak pasir dibagi beberapa type salah satunya yaitutype rotary atau berputar. Dalam penelitian ini, akan menciptakan performa terbaik mesinpengayak pasir zeolit type rotary dengan menentukan parameter variasi sudut kemiringan dankecepatan putaran yang tepat pada tabung pengayak. Variasi yang telah ditentukan akanberpengaruh terhadap lama waktu proses pengayakan dan hasil pengayakan pasir zeolit. MetodeTaguchi digunakan untuk mengoptimalkan variasi yang digunakan berupa matriks orthogonalL9 (32). Berdasarkan hasil penelitian ini sudut kemiringan dan kecepatan putaran berpengaruhsignifikan terhadap lama waktu proses pengayakan dan hasil pengayakan pasir zeolit dengannilai persen kontribusi sebesar 17,72% dan 45,18% terhadap lama waktu pengayakaan,sedangkan untuk hasil pengayakan dengan nilai kontribusi 39,33% dan 33,45%. Maka prosespengayakan pasir terbanyak didapat pada variasi sudut 10° dan 28 rpm menghasilkan hasilsaringan pasir halus zeolit 6,70 kg dengan waktu 256,6 sec dan hasil lama waktu pengayakantercepat didapat pada variasi sudut 20° dan 61 rpm menghasilkan waktu pengayakan 198,3 secdengan hasil berat pasir halus 2,67 kg. Sehingga hasil penelitian ini bisa sebagai alternatifpemilihan variasi parameter pada proses pengayakan pasir zeolit menggunakan mesin pengayaktype rotary.Kata Kunci: mesin pengayak, rotary, pasir zeolit, sudut, kecepatan
Co-Authors Agus Triono Ahmad Syuhri Digdo Listyadi, Digdo Dinata, Fadea Dwiqoryah, Rika Haidzar Nurdiansyah Jamil, Farur Muhammad Asrofi, Muhammad Muhammad Dimyati Nashrullah Muhammad Wildan Robertus Sidartawan Sembada, Iqbal Varian Sholahudin, Imam Trifiananto, M Yuni Hermawan