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Burhan Ibnu Mubtadi
Program Studi Mesin Otomotif, Politeknik Pratama Mulia Surakarta
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Ketangguhan Retak Komposit Epoxy - Serbuk Cangkang Kerang Yohanes Suyoko; Burhan Ibnu Mubtadi
Politeknosains Vol 19 No Edisi Khusus (2020): Jurnal Politeknosains Volume 19 Edisi Khusus - Juli 2020
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

Composite is a new material resulting from a combination of two or more materials. Each of composite materials has advantages that will reduce or even eliminate the deficiencies of other materials. Fillers are given to strengthen the particle shaped matrix. This study aims to determine the effect of the addition of scallop powder in the epoxy matrix to the fracture toughness of the epoxy-scallop powder composite. The composite matrix is Eposchon products of PT. Justus Kimia Raya and its reinforcing material are scallop powder with a size of 40 mesh passes. The conventional method is used to make composites, where the scallop powder is mixed in epoxy resin with variations in weight fraction of 0%, 5%, 10% and 15%. Each composition was mixed with a mechanical stirrer for 15 minutes at 500 rpm and a temperature of 40 ° C. At the last minute the stirrer rotation is lowered at 100 rpm while adding a hardener (catalyst). The next process is pouring the mold followed by curing in an oven at 90 ° C for 2 hours. The specimen is then tested for fracture toughness according to ASTM D5045 standard. The test results showed that there was an increase in fracture toughness in all additional weight fractions of the shell powder. The biggest increase occurred in the addition of 5% by weight fraction, where the fracture toughness increased by 178.38% (1.03 MPa.m1/2).
Pengaruh Putaran Screw terhadap Keluarnya Adonan dari Nosel Mesin Pencetak Bakso Bambang Sugiyanto; Burhan Ibnu Mubtadi
Politeknosains Vol 17 No 2 (2018): Jurnal Politeknosains Volume 17 Nomor 2 - September 2018
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

The process of making meatballs is generally done using meatball moulding machine and machine owned by the manufacturer can only produce one type of meatball size. While consumers (culinary lovers of meatballs) there who want a sphere of meatballs that are smaller or larger or even form a long cylinder meatball like sausage. To design a meatball moulding machine that can produce meatballs with a variety of shapes and sizes the first thing to know is the speed of the meatball dough out of the nozzle mouth due rotation of screw in the mouthpiece dough. This study examines the relationship between rotation screw meatball moulding machine to the speed of the dough out of the machine nozzle mouth. The research method is done by varying the rotation of the screw axis and measuring the dough velocity out of the nozzle of the moulding machine. Data analysis was performed to obtain mathematical equations of the relationship between rotation screw meatball moulding machine to the speed of the dough out. The results showed that the higher the rotation the greater the dough velocity out of the dough funnel nozzle, but not directly proportional. Mathematical equations are very useful as a reference for the designer meatball machine designers if designing machines with a variety of shapes and sizes of meatballs.
Pengaruh Siklus Panas pada Komposit Limbah Plastik HDPE-Serat Cantula sebagai Bahan Material Alternatif Melalui Uji Mekanik Sunaryo; Burhan Ibnu Mubtadi
Politeknosains Vol 15 No 2 (2016): Jurnal Politeknosains Volume 15 Nomor 2 - September 2016
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

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Abstract

This research is to determine the effect of thermal cycling on mechanical properties of such composites. Mechanical properties test in the tensile strength, bending strength and impact strength. Composite materials using HDPE powder as a cosmetic bottle waste cantula matrix and fibers as reinforcement, fiber volume fraction is 40% composed of random. Specimens were made using a hot molding machine. Temperature thermal cycle with a variation of 60 ° C, 70 ° C, 80 ° C, 90 ° C and 100 ° C. Variations in the number of cycles performed 100 times. Testing of mechanical properties of the composite tensile strength using ASTM standard 3039, bending strength ASTM D 6272 standard, and impact strength testing with ASTM D 5941. Results of testing the mechanical properties of composites obtained the data that the composite thermal cycle with a temperature of 60 ° C were carried out as many as 100 times. The tensile strength of 26 MPa, bending strength of 29 MPa and impact strength 45 kJ / m². Composites with a thermal treatment at temperatures above 70 ° C resulted in the degradation of the material so that the mechanical strength decreases.
Co-Authors Bambang Sugiyanto Sunaryo Yohanes Suyoko