JMI Vol. 40 No. 1 Juni 2018 METAL INDONESIA Journal homepage: http://www.jurnalmetal.or.id/index.php/jmi p-issn: 0126 – 3463 e-issn : 2548-673X STUDI AWAL SOLVENT DEBINDING FEEDSTOCK METAL INJECTION MOLDING Fe2%Ni A PRELIMINARY STUDY ON THE SOLVENT DEBINDING OF Fe2%Ni FEEDSTOCK IN METAL INJECTION MOLDING PROCESS Winda Sri Jaman, Shinta Virdhian, Eva Afrilinda Balai Besar Logam dan Mesin Jl. Sangkuriang No. 12 Bandung Email: windasj@yahoo.com Abstrak Metal Injection Molding (MIM) merupakan proses manufaktur yang mempunyai 4 tahapan proses utama yaitu mixing, injection, debinding dan sintering. Solvent debinding adalah salah satu cara menghilangkan polimer dari serbuk logam (feedstock). Kelebihan dari solvent debinding ini adalah larutan yang digunakan dapat di daur ulang sehingga mengurangi biaya produksi produk MIM. Penelitian ini diperlukan untuk memenuhi kebutuhan industri dan memperkaya proses-proses debinding dengan berbagai larutan (solvent) kimia. Studi awal solvent debinding pada feedstock Fe2%Ni hanya dibatasi untuk menghilangkan binder jenis paraffin wax, karena penggunaannya hampir di setiap feedstock MIM terdapat paraffin wax. Feedstock dilarutkan dan direndam menggunakan larutan ethanol, n-hexane, heptana dengan parameter waktu 2,3,4 jam dan temperatur 40,45,50°C untuk ethanol dan n-hexane, heptana dengan temperatur 50,55 dan 60°C. Ditimbang kehilangan berat feedstock dari masing-masing para mater yang telah dilarutkan dan di keringkan pada temperatur 30°C . Kelarutan ethanol terhadap kehilangan berat terendah 0,53% dan kehilangan berat tertinggi 1,70%. Kelarutan n-hexane terhadap kehilangan berat terendah 4,14% dengan kehilangan berat tertinggi pada 4,55%. Kelarutan heptana terhadap kehilangan berat tertinggi dibandingkan dengan ethannol dan n-hexane, kehilangan berat terendah 3,40% dan kehilangan berat tertinggi 9,74%. Kondisi feedstock yang sudah di debinding terlihat masih terdapat sisa-sisa binder selain paraffin wax, keragaman bentuk pada serbuk menjadikan kehomogenan pada feedstock. Kata kunci: Solvent Debinding, Ethanol, n-Hexane, Heptana Abstract Metal Injection Molding (MIM) is a manufacturing process that has 4 main process stages: mixing, injection, debinding and sintering. Solvent debinding is one way to remove polymers from metal powders (feedstock). The advantages of this solvent debinding is that the solution used can be recycled thereby reducing the cost of producing MIM products. This research is needed to meet the needs of industry and enrich the processes of debinding with various chemical solutions (solvent). The initial study of solvent debinding in the Fe2% Ni feedstock is limited only to remove paraffin wax type binders, because of its use in almost every MIM feedstock there is paraffin wax. The feedstock was dissolved and immersed using ethanol, n-hexane, heptane solution with a time parameter of 2,3,4 hours and temperature of 40,45,50 ° C for ethanol and n-hexane, heptane with temperature 50,55 and 60 ° C. Weighed by loss of feedstock weight from each of the dissolved mater and dried at 30 ° C. The solubility of ethanol to the lowest weight loss was 0,53% and the highest weight loss was 1,70%. The solubility of n-hexane to the lowest weight loss was 4,14% with the highest weight loss at 4,55%. The solubility of heptane to the highest weight loss was compared with ethannol and n-hexane, when the lowest weight loss was 3,40% and the highest weight loss was 9,74%. Feedstock conditions that have been in the debinding is still visible remains of binders other than paraffin wax, the diversity of shapes on the powder to make homogeneity on the feedstock. Keywords: Solvent Debinding, Ethanol, n-Hexane, Heptane