Engineering of Rocking Nut Maker Tools

Sulharman Sulharman Sulharman
2016 IPTEK: The Journal for Technology and Science  
AbstractThere had been mechanically conducted an engineering of Rocking Nut Maker Tools for rocking nut small industry. The objective is to engineer a maker tool for rocking nut which can work with the assistance of motor without using manpower, thus it will increase the production of rocking nut. Making method on rocking nut maker tool includes: (1) Designing tool; (2) tool making; (3) Tool testing. According to the result of engineering tool, there were obtained: frame for tray that was made
more » ... tray that was made from angle iron: the height was 450 mm, the length was 1500 mm, and the width was 500 mm width, while the thickness was 3 mm. The tray was made from aluminium with 60 mm height, 1485 mm length, 485 mm width and 3 mm plate thickness. The motor had the power capacity of ½ HP, single phase and 1400 rpm while gearbox was 1:10. The wheels were made from iron with the diameter of 60 mm and the thickness of 20 mm. There are 4 wheels which were installed under the tray. Popper mechanism was made from iron that included iron plate with the diameter of 210 mm, the thickness of 7 mm and iron bar with the diameter of 15 mm and the length of 220 mm. This was equipped with speed variable. The result from tools performance could increase the production capacity by 400%; the bumpy texture on peanut surface could attach more strongly, the storage capacity increased for 6 months, while the production only lasted for 3 months if it was by manual. The capacity of rocking nut maker was 45 kg/day; it was only 7.5 kg/day by manual. The average time consumed for rocking nut making was 1.5 hours/ processing, while by manual was 3 hours/ processing. The rocking speed was 89-99rpm. This was an economical technology, by using this engineered tool, the production capacity per month was increased by 750 kg or equivalent with Rp. 47,250,000.-and by using this tool, there was an increase in profit of Rp. 13,450/ kg while by manual was only Rp 2,250/ kg. On the other side, the production cost by using tools was Rp 51, 550/kg, while by manual was Rp. 72.750/kg. Keywords engineering tools, performance, rocking nut. AbstrakTelah dilakukan rekayasa alat pembuat kacang goyang secara mekanis untuk industri kecil kacang goyang.Tujuannya adalah merekayasa suatu alat pembuatan kacang goyang yang dapat bekerja tanpa banyak menggunakan tenaga manusia dengan bantuan motor penggerak sehingga produksi kacang goyang meningkat. Metode pembuatan alat pembuat kacang goyang, meliputi : (1) mendesain alat, (2) pembuatan alat, (3) menguji alat. Berdasarkan hasil rekayasa alat diperoleh ; rangka untuk nampan terbuat dari besi siku : tinggi 450 mm, panjang 1500 mm, lebar 500 mm dan tebal 3 mm. Nampan terbuat dari aluminium dengan tinggi 60 mm, panjang 1485 mm, lebar 485 mm dan tebal plat 3 mm. Motor dengan daya ½ HP, 1 phasa dan 1400 rpm sedangkan gearbox 1:10. Roda terbuat dari besi dengan diameter 60 mm dan tebal 20 mm. Roda berjumlah 4 buah yang dipasang pada bagian bawah nampam. Mekanisme penggoyang terbuat dari besi yang terdiri dari piringan besi dengan diameter 210 mm, tebal 7 mm dan batang besi dengan diameter 15 mm dan panjang 220 mm. Dilengkapi dengan variable speed. Hasil unjuk kerja alat dapat meningkatkan kapasitas produksi sebesar 400%, duri pada permukaan kacang melekat lebih kuat dan daya simpan meningkat lebih lama 6 bulan sedangkan produksi manual hanya 3 bulan. Kapasitas alat pembuatan kacang goyang 45 kg/hari. Waktu pembuatan kacang goyang rata-rata 1,5 jam/proses sedangkan secara manual 3 jam/proses. Kecepatan penggoyangan 89-99 rpm. Tekno ekonomi, dengan alat hasil rekayasa ada kenaikan kapasitas per bulan 750 kg atau sebesar Rp. 47.250.000,-.serta laba dengan menggunakan alat naik menjadi Rp.13.450/kg sedangkan secara maual Rp. 2.250/kg. Sedangkan biaya produksi menggunakan alat Rp. 51.550/kg dan Rp. 72.750/kg secara manual. Kata Kunci rekayasa alat, unjuk kerja, kacang goyang.
doi:10.12962/j20882033.v26i2.1019 fatcat:53xkl72pgbfzlmi32fugxyhaz4