Studi Eksperimen Pengaruh Parameter Proses Injeksi Molding Terhadap Shrinkage Material Biokomposit Serat Sisal Menggunakan Response Surface Methodology (RSM)

Al-amin, Muhammad Akbar (2018) Studi Eksperimen Pengaruh Parameter Proses Injeksi Molding Terhadap Shrinkage Material Biokomposit Serat Sisal Menggunakan Response Surface Methodology (RSM). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Shrinkage (penyusutan) merupakan salah satu sifat yang dimiliki material plastik, dimana semakin besar nilai prosentase shrinkage dapat mengakibatkan kualitas produk menjadi tidak baik atau cacat produk. Oleh karena itu, sifat shrinkage tersebut dapat dikontrol oleh parameter-parameter yang berada di mesin injeksi. Parameter yang digunakan untuk meminimalisir nilai shrinkage antara lain melt temperature, holding pressure, dan injection pressure. Spesimen yang digunakan berdasarkan standard uji ASTM D955. Penentuan parameter perlu dilakukan didalam suatu proses produksi untuk mendapatkan kualitas dari produk yang terbaik. Metode Response Surface sekumpulan metode-metode matematika dan statistika yang digunakan dalam pemodelan dan analisis, yang bertujuan untuk melihat pengaruh beberapa variabel kuantitatif terhadap suatu variabel respon dan untuk mengoptimalkan variabel respon tersebut. Rancangan Box-Behnken digunakan pada proses pengambilan data karena terdapat 3 faktor parameter proses dan hasil rancangan umumnya sangat efisien. Penilitian studi eksperimen ini dihasilkan parameter proses injeksi yaitu melt temperature, holding pressure, dan injection pressure mempunyai pengaruh yang sangat signifikan terhadap respon shrinkage pada material biokomposit serat sisal dengan komposisi 80% Polypropelene, 10% MAPP dan 10% Serat sisal. Pengaruh parameter proses melt temperature terhadap respon shrinkage dapat disebabkan density dan Coefficient of Thermal Expansion, sedangkan pada parameter proses holding pressure dan injection pressure dapat disebabkan sifat kompresibilitas material biokomposit serat sisal. Optimasi menghasilkan nilai prosentase sebesar 1.19 % pada melt temperature 185 0C, holding pressure 35 bar, dan injection pressure 60 bar. ======================================================================================================= Shrinkage is one of the properties of plastic materials, where the greater the percentage of shrinkage can result a poor quality of product or making defect the product. Therefore, the shrinkage properties can be controlled by the parameters in the injection machine. Parameters used to minimize shrinkage values are melting temperature, holding pressure, and injection pressure. Specimens were used based on the ASTM D955 test standard. Parameters needs in a production process to get the best product quality. Response Surface Methodology is a group of mathematical and statistical methods used in modeling and analysis, which purpose to see the effect of some quantitative variables on a response variable and to optimize the response variable. Box-Behnken design is used in the data retrieval process because there are 3 factors of process parameters and the design result is generally very efficient. Research of this experimental study has been resulted, the parameters of the injection process are melting temperature, holding pressure, and injection pressure have significant effect on shrinkage response on sisal fiber biocomposite material with 80% Polypropelene, 10% MAPP and 10% sisal. The effect of melt temperature process parameters on shrinkage response can be due to density and Coefficient of Thermal Expansion, while the holding process pressure and injection pressure parameters can be due to the compressibility properties of the sisal fiber biocomposite material. Optimization yields a percentage value of 1.19% at melting temperature 185°C, 35 bar holding pressure, and 60 bar injection pressure.

Item Type: Thesis (Undergraduate)
Additional Information: RSM 671.23 Ala s-1 3100018076957
Uncontrolled Keywords: Shrinkage, Metode Response Surface, Biokomposit, Injection Molding.
Subjects: Q Science > QA Mathematics > QA279 Response surfaces (Statistics)
T Technology > TP Chemical technology > TP1151 Special molding and casting processes
T Technology > TS Manufactures > TS170 New products. Product Development
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Muhammad Akbar Al-amin
Date Deposited: 10 Dec 2020 08:24
Last Modified: 10 Dec 2020 08:24
URI: http://repository.its.ac.id/id/eprint/55431

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