?GJ-SJ450 automatic four sides chamfering machine adopts imported PLC man-machine interface operating system,high-precision guide rail and imported servo with intelligent control. ?It is quick and convenient to replace the mould and features easy operation.It does not require professional starting master,and is easy to learn with stable and efficient production. ?It can save costs for the packaging products companies,improve the product quality and production efficiency,this equipment is suitable for various covers such as hardcover gift box garments,tea products,food products,cosmetics and mobile phone boxes,electronic products boxes,cosmetics boxes,shoe boxes,etc.