Paper cylinder hemmer

Abstract

The invention discloses a paper cylinder hemmer. The paper cylinder hemmer comprises a pressing propping disc, wherein a groove is formed in the pressing propping disc; the bottom of the groove is arc-shaped; a circle of bulge which is in a round table shape being small in upper part and big in lower part is arranged on the inner side of the groove; and a first through hole is formed in the middleof the bulge. The paper cylinder hemmer further comprises a push-pull rod, backing plates and a plurality of inner pressing blocks; the inner pressing blocks are connected through a compression spring; inner rings of the inner pressing blocks sleeve the bulge; and the backing plates are arranged on the tops of the inner pressing blocks; one end of the push-pull rod penetrates through each backingplate and the first through hole. When the edge is curled, a lateral supporting force for the edge is provided inside a paper winding drum, the edge can be more tightly attached to the inner wall ofthe paper winding drum by the supporting force, and the elastic recovery is not easy to occur. In addition, the system provides two folds to completely wrap the rough edges of a paper cylinder.

Description

technical field [0001] The invention relates to the technical field of crimping devices, in particular to a crimping device for a paper cylinder. Background technique [0002] The paper cylinder edge curler is a kind of equipment used to wind the raw edges of the two ends of the paper cylinder to the inner ring. After rolling the burr to the inner ring of the cylinder, it is not easy to touch the burr when human hands touch it, resulting in the phenomenon of hand cutting. In addition, the burr is not easy to touch other objects, causing the burr to spread. [0003] see figure 1 and figure 2 , discloses a drawing of an existing paper cylinder crimping device. This crimping device includes a pressing plate 100, a groove 101 is arranged on the pressing plate, and the bottom of the groove is arc-shaped. When using, see image 3 , the end of the paper tube is inserted into the groove, and then a top pressure is applied to the paper tube toward the groove. Under the influenc...

AI Technical Summary

Problems solved by technology

[0004] There is a problem with this kind of crimping device, that is, the bending force of the paper tube depends entirely on the top pressure, and there is no lateral pressing force on the bent part of the paper tube, so that even if the bent part of the paper tube is rolled in It is easy to return to its original shape under the action of elastic restoring force, which will lead to waste products

Another point is that the original crimping device only provides one inward folding, and the raw edge of the cylinder is still exposed after inward folding, and there is still a risk of spreading

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