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Journal of Mechanical Engineering Science and Technology
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2580-0817 - ISSN (Online) 2580-2402
Published by Universitas Negeri Malang Homepage  [37 journals]
  • Analysis of Casting Defect, Tensile Strength, and Hardness of Al-Si
           Casting Alloy with Percentage Variation of Clay Binder Bangkalan

    • Authors: Imam Muhtarom, Sunomo Sunomo
      Pages: 43 - 49
      Abstract: Casting is one of method that used in forming the work piece by melting specific metal and pouring into moulding that has been prepared. This study aimed to determine the effect of the use of Bangkalan clay as binder in sand moulding against tensile strength, hardness, and defects in Al-Si casting alloy by using gravity casting method. The method used in this study was experimental method then using descriptive analysis. Descriptive analysis included explanation of the test result of tensile strength, hardness, and the type of surface defect of Al-Si casting. Based on the research result obtained the highest shear strength in wet condition obtained on sand moulding which had the highest tensile strength, that was sand moulding with composition of 12% Bangkalan clay, and 0.5% bentonite. While the highest hardness value of Al-Si casting result obtained on specimen with variation of 12% Bangkalan clay with the value of 131.9 HV. Casting defects that appeared on the surface of all casting product variations. The defects that found were fin defects, pinhole defects, sand loss defects, and surface roughness. Based on the result above, could be concluded that variation of 9% Bangkalan clay and 0.5% bentonite as binder was the best variation.
      PubDate: 2018-10-08
      Issue No: Vol. 2, No. 2 (2018)
       
  • Analysis of Hardness, Microstructure, Macrostructure, and Fluidity of
           Al-Si with Eggshell Variation as Binder in Sand Casting

    • Authors: Retnaldi Fitriyanto, Poppy Puspitasari, Putut Murdanto
      Pages: 50 - 56
      Abstract: Metal casting process can be described as the process of making object by melting metal then poured into the desired mould. The mould that is commonly used is sand moulding. Binder which commonly used in sand casting process is bentonite. Bentonite is kind of mineral which can be run out if it is used continuously. The background of this study was to analyse the other binder that could reduce the use of bentonite by utilizing eggshell. This study aimed to analyse the hardness, microstructure, macrostructure, and fluidity of the cast which yielded by using variations of eggshell. The method that used was experimental method with a model of one-shot case study with descriptive analysis. The study result showed that the highest value of fluidity test was found at variation of 7% eggshell and 3% bentonite with hardness value of 180.86 HV. There were found several defects, casting result with variation of 4% eggshell and 3% bentonite found that there were ± 28 pinhole defects and ± 20 open grain defects. There were found ± 65 pinhole defects and ± 30 open grain structure defects in the casting result with variation 7% eggshell and 3% bentonite. The casting result with variation 10% eggshell and 3% bentonite had ± 50 pinhole defects and ± 30 open grain structure defects.
      PubDate: 2018-10-08
      Issue No: Vol. 2, No. 2 (2018)
       
  • Design and Implementation of MOAT (Moth Attractor Technology):
           Glue-Tube-Light System with RTC (Real Time Clock) Module

    • Authors: Yusuf Aji Wicaksana, Dani Prasetyo, Himmatul Ulya Alfartri Syachofina, Eka Larasati Oktaviani, Retno Wulandari
      Pages: 57 - 63
      Abstract: Massive reduction of onion in Kabupaten Probolinggo was caused by Spodoptera exigua attacks. Since 2012, the significant reduction of onion production was up to 19%. One of the farmers group facing the reduction is Sumber Makmur III with total of reduction is up to 61.69%. The culture technique has done by farmers using conventional lamp and net which have many weaknesses from its implementation. Based on this problem, innovative technology MOAT (Moth Attractor Technology) has created as portable moth attractor. It is the innovative solution using lamp, box and glue completed by RTC (Real Time Clock) and having special glue to intensify the effectiveness and efficiency in exterminating the moths. Following methods have done are (1) literature study and observation, (2) designing product, (3) production, (4) device trials, (5) product’s socialization and implementation, and also (6) monitoring and evaluation. The result is MOAT which can effectively attract up to 770 months in a week. It can help the farmers reduce the damage of onion and increase the production up to 11.07 quintal in 180 m2 area. Furthermore, it can also increase the income of onion farmers.
      PubDate: 2018-10-08
      Issue No: Vol. 2, No. 2 (2018)
       
  • The Effect of Bed Catalyst Design Variation on Catalytic Converter against
           Exhaust Emission Level of Carbon Monoxide (CO) and Hydrocarbon (HC) in
           Gasoline Engine

    • Authors: Riky Arianto, Imam Muda Nauri
      Pages: 64 - 73
      Abstract: The increasing motor vehicle in Indonesia causes air pollution. Several gases that arise as pollutants are carbon monoxide (CO), hydrocarbon (HC), nitrogen oxides (NOx). This study aimed to determine the effect of catalyst bed design variation on catalytic converter on exhaust emissions of carbon monoxide and hydrocarbons in gasoline engine. The method used in this study was to compare the level of exhaust emissions with and without application of bed catalyst variation by putting hole on all of bed catalyst part, putting hole on the middle and side of bed catalyst part, and putting hole on the top and bottom part of bed catalyst part. The results showed that the lowest level of CO was on sample without catalyst, with value of 1.6%vol at 1500 RPM. While the result with variation hole on bed catalyst showed that the CO level on of full hole was 3.01%vol at 1500 RPM, hole on the middle and side was 3.19%vol at 1500 RPM, and hole on the top and bottom was 1.93%vol at 1500 RPM. Meanwhile, the lowest decreasing of HC level was found on the sample without catalyst, with the value of 155 ppm at 8000 RPM. Whereas the result with variation hole on the bed catalyst showed that the HC level on full hole variation was 543 ppm at 7500 RPM, hole on the middle and side was 459 ppm at 6500 RPM, and hole on the top and bottom was 509 ppm at 7500 RPM.
      PubDate: 2018-10-08
      Issue No: Vol. 2, No. 2 (2018)
       
  • Analysis of Hardness, Quality and Fluidity Al-Si Casting Result by Using
           Clamshell (Placuna placenta) as The Mixture of Sand Moulding

    • Authors: SMSN Shikh Zahari, Saif Aziz Saputra, Putut Murdanto
      Pages: 74 - 78
      Abstract: Metal is an element that cannot be separated from human life. Almost all of human activities includes metal element in it. Metals can be formed through several ways, one of which is metal casting. Metal casting is one of technique in producing products where the metal was melted in crucible and then poured in a moulding which is similar to the original shape of the product. Moulding that are commonly used are sand moulding. Commonly, binder which used in sand casting process is bentonite. Bentonite, was kind of mineral which can be run out during its usage. This study aimed to analyse the alternative binder to reduce the usage of bentonite. This study analysed the using of clamshell as the mixture of moulding sand against the hardness, quality and fluidity of Al-Si casting result. The highest hardness value was found at the specimen with the mixture of 11% clamshells with an average hardness value of 122.96 HV. The highest value of fluidity also presented in the specimen which used mixture of 11% clamshells that resulted the length of specimen at 789 mm. Based on the analysis of casting defect showed that specimen which used 5% clamshells had the fewest and the smallest defect compared the other specimens.
      PubDate: 2018-10-08
      Issue No: Vol. 2, No. 2 (2018)
       
  • Analysis of Mechanical Properties and Permeability of Sand Moulding by
           Using Eggshell in Sand Casting

    • Authors: Wahyu Kurnianto, Poppy Puspitasari, Wahono Wahono
      Pages: 79 - 84
      Abstract: This study aimed to analyse the usage of Eggshell as mixture material of bentonite in metal casting process which used dried sand moulding. Eggshell variations in this study were 4%, 7%, 10% eggshell, and additional 3% of bentonite on each sample. This study used pre-experimental method and included to One-Shot Case Study model. The highest strength was found on the sample 3 ES 10%. Tensile strength of dried sand moulding reach up to 0.09 kg/cm2, the compressive strength of dried sand moulding reached up to 3.11 kg/cm2, and the shear strength of dried sand moulding reached up to 1.13 kg/cm2. Based on the test result indicated that permeability of sand moulding by heat treatment at 110ºC for 60 minutes at sample of 3 ES 10% was at 178.3 ml / min.
      PubDate: 2018-10-08
      Issue No: Vol. 2, No. 2 (2018)
       
  • The Analysis of Permeability and Mechanical Properties of Sand Moulding
           Using Mixed Material Clamshell (Placuna placenta) on Sand Casting

    • Authors: Kritchakhris Nawettanaprasert, Zakaria Bagus Aminanta, Putut Murdanto
      Pages: 85 - 89
      Abstract: This study objected to determine mechanical properties of sand moulding by conducting tensile test, compressive and shear test, and also permeability test. This study also had the other objective that was analyse clamshell (Placuna placenta) as mixture material for bentonite as binder in manufacturing sand moulding in order to reduce the usage of bentonite. The method that used in this study was pre-experimental method with One-Shot Case Study model. The best mechanical properties obtained on sample 3 clamshell 11%, permeability results obtained was 190 ml/min, tensile strength results obtained for the dry sand was 0.015 kg/cm2, compressive strength obtained for the dry sand was 2.91 kg/cm2, and the shear strength of sand moulding in dry condition was 0.92 kg/cm2.
      PubDate: 2018-10-08
      Issue No: Vol. 2, No. 2 (2018)
       
 
 
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