Erwanto, Jefri (2109) Peningkatan Kualitas Tali Karet Dengan Optimasi Tensile Strenght Dan Time Curing Menggunakan Response Surface Methodology. Masters thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
09211750013020-Master_Thesis.pdf Download (1MB) | Preview |
Abstract
Semakin ketatnya persaingan industri alas kaki, membuat setiap perusahaan manufaktur sandal jepit harus menjaga kualitas, harga dan ketersediaan barang dengan baik, Salah satu cara yang bisa dipilih dalam memenangkan persaingan tersebut adalah dengan meminimalkan barang cacat produksi. Dalam proses pembuatannya tali sandal japit dibedakan menjadi 2 kategori bahan baku utama, yaitu PVC base dan Rubber base. Rubber base memiliki sifat fisik yang terpenting dalam proses produksinya yaitu Tensile strenght dan Time curing 90 ( waktu masak 90 ). Permasalahan yang selalu muncul dalam proses produksi tali karet adalah masih ditemukannya nilai uji tarik yang dibawah standart yang ditetapkan, hal ini mengkaibatkan terjadinya putus tali karet pada saat proses assembling dan itu terjadi di kisaran 2% dari jumlah produksi keseluruhan. Hal ini mengakibatkan kerugian dari segi material, waktu dan tenaga kerja. Kombinasi respon Tensile strenght (kekuatan Tarik) dan Time curing 90 (waktu masak 90) yang optimum didapatkan dengan mengkombinasikan elastomer, filler dan co-accelerator yang paling tepat, sehingga permasalahan tali karet yang berada di bawah standart terselesaikan. Data dari penelitian ini didapatkan dari percobaan secara langsung sebanyak 15 kali berdasarkan rancangan percobaan box-behnken. Data hasil percobaan kemudian diolah dan dianalisa dengan menggunakan metode multiple surface response dari software minitab. Kemudian dilakuakan optimasi respon untuk mendapatkan kombinasi nilai respon yang optimal dari target respon yang iharapkan.selanjutnya hasil optimasi diverifikasi ulang dengan percobaan verifikasi sebanyak 3 kali pada respon optimum. Semua faktor meliputi elastomer, filler dan co-accelerator berpengaruh signifikan terhadap respon tensile strength dan time curing. Dengan komposisi elastomer = 70 PHR, filler = 30 PHR, dan co-accelerator = 1.47 PHR. Nilai optimum untuk respon tensile strength adalah 15 kg/cm2 dan time curing adalah 3.5 menit. Hasil optimasi tersebut memberikan kenaikan kapasitas produksi sebesar 12,5%. Namun berdasarkan pada serapan pasar pada 1 tahun sebelumnya, perusahaan tidak mengambil langkah untuk menaikkan kapasitas produksi melainkan melakukan pengembangan produk pada basis polimer polyurethane dan targer pasar modern market.
================================================================================================================
The tight competition in the footwear industry, especially for flip-flops product makes every manufacturer of flip flops have to maintain the quality, price and availability of goods well. One way that can be chosen in winning the competition is to minimize production defects, so will not effect other costs that add to the expenses included in the cost of goods sold. In the process of making strap of sandals, the categories are divided into 2 main raw materials, namely PVC base and Rubber base. The rubber base has the most important physical properties in the production process, namely Tensile strength and curing time 90. The problem that always arises in the rubber strap production process is the fact that the tensile test value is below the standard set, this implies the breaking of the rubber strap during the assembling process with the footprint and it occurs in the range of 9 - 11% of the total production. This results in material, time and labor losses. The combination of the optimum response for Tensile strength and Time curing 90 is obtained by combining the elastomer, filler and co-accelerator that are most appropriate at certain level factors is the best way to overcome the tensile test value which is below the standard set . Data from this study have been obtained from 15 direct experiments based on Response Surface Methodology by using box-behnken experimental design. The experimental data processed and analyzed using the Minitab 18 and response optimization was performed to get the optimal response value combination from the expected target response, then the optimization results were re-verified with 3 times the verification experiment in the optimum response. The analysis shows that all factors including elastomer, filler and co-accelerator have a significant effect on tensile strength and time curing responses. The best composition composition of the material to get the optimal combination of responses from certain response limits is the elastomeric composition = 70 PHR, filler = 30 PHR, and co-accelerator = 1.47 PHR. The optimum value for tensile strength response is 15 kg / cm2 and time curing is 3.5 minutes. The results of the optimization provide an increase of 12,5% in production capacity. However, based on market absorption in the previous 1 year, the company did not take steps to increase production capacity but the company will develop products on a polyurethane polymer base and change the target to modern market.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTMT 658.5 Erw p-1 |
| Uncontrolled Keywords: | flip flop, tensile strength, time curing, response optimization, Response Surface Methodology, Regression analysis |
| Subjects: | T Technology > TS Manufactures T Technology > TS Manufactures > TS156 Quality Control. QFD. Taguchi methods (Quality control) |
| Divisions: | Faculty of Business and Management Technology > Management Technology > 61101-(S2) Master Thesis |
| Depositing User: | erwanto jefri |
| Date Deposited: | 25 Mar 2025 07:18 |
| Last Modified: | 25 Mar 2025 07:18 |
| URI: | http://repository.its.ac.id/id/eprint/68205 |
Actions (login required)
 |
View Item |