CN2465944Y
A structurally improved paper tube elbow crimping die with a main structure comprising a paper tube and a die to be processed. A fixed screw hole is provided at the bottom end of the disk-shaped die head, and a guiding groove for matching the size of the paper tube to be processed is arranged on the end face, and an auxiliary bending piece hole groove leading to the guiding groove is arranged on the edge. The paper tube is guided into the guide groove and the die is rotated to curl the inner edge of the paper tube into an elbow. Generally, the inner edge of the paper tube to be processed is previously cut into an elbow processing surface, and an appropriate number of expansion hole grooves are provided on the inside of the die guide groove to expand and compact the inner edge of the paper tube above the elbow. With lead angle.