내부유동을 개선한 압연롤러의 열전달 특성에 관한 연구

A Study on the Heat Transfer Characteristics of a Rolled Roller with and Improved Inner Flow

The separation of metal chips from a roller is a very important problem in the performance of a food pulverizer because the metal fragments contaminate the pulverized food powder. It was reported that the metal chip separation is facilitated as the temperature of a roller increases from other previous studies, which means that the surface temperature of a roller is a key factor of the metal chip separation. This study is performed to reduce the separation of metal chips from a roller in a pulverizing process. We changed the design parameters such as a surface shape of a roller, a cooling temperature, and a cooling water flowrate for the cooling of a roller. From the experiments, it was found that the changes of the design parameters greatly increased the heat transfer efficiency, which resulted eventually in the reduction of the separation of metal chips from a roller.