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Cristanto Putra Mbulu, Bernadus
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Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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EFFECT OF TEMPERATURE VARIATIONS IN MANUAL TUBING MACHINES FOR PET PLASTIC MATERIAL ON TENSILE STRENGTH Wijaya, Kelvin; Murdiyanto, Danang; Cristanto Putra Mbulu, Bernadus
Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i2.98

Abstract

Briquettes are a type of alternative energy whose raw material source Plastic waste is an environmental problem faced by the people of Indonesia and the world. On the other hand, the production of waste generated in various institutions and sectors in Indonesia continues to increase every year, including the industrial sector whose production process is large-scale. Its use as a basic material for packaging bottles reaches 30% of world use. PET is also used as a synthetic fiber or polyester which accounts for 60% of world use. Study the author will do that is to make a tubing made from PET plastic waste that can be used as raw material for tubing. Using temperature variations (190℃, 200℃, 210℃), then 9 samples from each variation will be micro-photographed the effect of temperature on tubing results and tested for maximum tensile. After that, calculations are carried out to obtain the maximum tensile stress and strain values. Then the average maximum load value that can be received by PET tubing is highest at 190ºC temperature tubing has the ability to withstand tensile strength better than all temperature variations so that the average value is 35.94 N/mm2 and 200ºC is able to withstand 35.49 N/mm2 and 210ºC with 18.30 N/mm2. It can be interpreted that the higher the temperature, the effect on holding the tensile strength of the PET tubing and making the plastic structure change so that 210oC is close to the recycling value, while for temperatures below it is still non-recycled.
STUDY OF VARIATIONS IN GROOVED PRESS ROLLER LOADING ON THE TENSILE STRENGTH OF UMBRELLA GRASS FIBERS Anom Palmatira, Dismas; Murdiyanto, Danang; Cristanto Putra Mbulu, Bernadus
Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i2.99

Abstract

Composite materials have better material properties than ordinary materials. Based on current developments, the author participates in the development of composite materials by making a fiber from umbrella grass which is used to make composite materials. The author uses a grooved roller press to make umbrella grass fibers, using various loadings of 35kg, 40kg and 45kg, umbrella grass that has been rolled then looks at the structure of the fiber whether there is damage or fracture then every loading 3 fiber samples are taken and tested to obtain the strength value maximum pull. After the test data is obtained, calculations are carried out to obtain the maximum tensile strength value of each sample. The results obtained from each fiber with the highest tensile strength are loading of 35 kg with a tensile strength of 61.13478261MPa with a well-formed fiber structure, defects or fractures occur, then loading of 40 kg with a tensile strength of 55.90645161MPa with a well-formed fiber structure without Defects occurred and the final loading was 45 kg with a tensile strength of 28.02857143 MPa with the fiber structure formed where there were broken or defective parts of the fiber. Based on the research that has been done, umbrella grass fiber which has the highest tensile strength value and also has good fiber without damage is fiber at a loading of 35 kg.
ANALYSIS OF TENSILE STRENGTH OF HDPE 3D PRINTER FILAMENT PRODUCTION PROCESS THROUGH TEMPERATURE AND TIME VARIATIONS Kharis, Abdul; Cristanto Putra Mbulu, Bernadus; Tugur Redationo, Nereus
Mechanical, Energy and Material (METAL) Vol. 2 No. 2 (2024): Desember: Mechanical, Energy and Material (METAL)
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/metal.v2i2.100

Abstract

Plastic waste is one of the problems currently being faced by countries in the world and Indonesia is one of them. Indonesia is the second world order of the world as a producer of plastic waste into the sea, which is 187.2 million tons after China which reaches 262.9 million tons. There are many kinds of plastic waste, including one of them HDPE plastic waste. In this study the researcher uses HDPE (High Density Poliyethylene) plastic waste which will be recycled into a filamentt of raw materials from 3D printers using temperature variations (200 ℃, 210 ℃, 220 ℃) with heating the heater band under 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above 1 hour and above obtained the highest capacity results at a temperature of 200 ̊C with heating time below 1 hour which produces filamentt production of 48.48 mm3/minute with a weight of 0.0028 kg/hour and motorcycle speed 10 rpm. Then 6 specimens from each variation will be photographed micro and tested to reach the point of breaking up. After that the calculation is done to get the maximum tensile voltage value and strain. Then obtained the highest maximum tensile voltage value with a temperature of 220 ̊C and heating plastic under 1 hour with a tensile strength value of 3,3344 N/mm2 This happens because the internal pore structure of the filament is formed more tightly and the plastic properties are still in good condition, this indicates that the load applied is evenly distributed on the filament
Co-Authors Anom Palmatira, Dismas Kelvin Wijaya, Kelvin Kharis, Abdul Murdiyanto, Danang Tugur Redationo, Nereus