Development of a Complete Rice Milling Machine for Khai Mod Rin Rice การพัฒนาเครื่องสีข้าวแบบครบวงจรสำหรับสีข้าวไข่มดริ้น

Abstract

The aim of this research was to develop a complete Khai Mod Rin rice milling machine that combines the threshing, drying, and milling of rice in one device. This rice milling machine can be operated continuously with the bucket elevator conveying the raw material, which reduces the production time. The product obtained is inexpensive and can mill both brown rice and white rice. It is small and suitable for the production capacity of a household or a communal enterprise. The test method of the rice milling machine was divided into 4 steps: threshing, dehumidification, milling brown rice, and milling white rice. From step 1 to step 3, 100 kg of paddy was used for each test. In step 4, 100 kg of brown rice was used for each test. The results of the tests revealed that 1) the threshing step: threshing the paddy harvested with the sickle and the Kae (a harvesting tool used by southern Thai farmers to collect the rice one by one) took 14.15 and 7.27 minutes, respectively. 2) The step of dehumidification: after the paddy was dried at 70 degrees Celsius for 3 hours, the moisture content was 12.6 percent. 3) The step of milling brown rice: the average yield of brown rice was 64.4 kg. The average rice milling time was 33.8 hours. The average maturity of the rice was 79.2 percent. 4) The step of milling white rice: the average yield of white rice was 84.4 kg. The average time for polishing rice was 4.24 hours. The average maturity of the rice was 88.5 percent. 5) The electricity cost of milling the paddy into the white rice was 1.55 baht per 1 kg of paddy.