Tightening head device of two-way stretching film winding machine

Abstract

The invention discloses a tightening head device of a two-way stretching film winding machine. The tightening head device comprises a fixing sleeve, a sliding sleeve, a sliding shaft, a transverse moving bearing assembly and an air cylinder, and a rotating shaft axially penetrates through the air cylinder; a transmission assembly used for driving the rotating shaft to rotate is arranged on a cylinder body of the air cylinder, the air cylinder is used for driving the sliding sleeve and the sliding shaft to jointly move transversely, one end of the sliding shaft is in transmission connection with the rotating shaft, and the other end of the sliding shaft extends out of the sliding sleeve and is provided with a chuck. According to the tightening head device, the air cylinder is arranged at the rear end of the fixing sleeve and connected with the fixing sleeve into a whole through screws, limitation of the side portion of the fixing sleeve on the cylinder diameter of the air cylinder is eliminated, on the one hand, the air cylinder has sufficient installation space, the cylinder diameter of the air cylinder can be set to be proper, and enough traction force is provided for the chuck.

Description

technical field [0001] The invention relates to the technical field of biaxially stretched film winding, in particular to a tensioning head device of a biaxially stretched film winding machine. Background technique [0002] At present, the tightening head device used for tightening the winding shaft in the winder generally adopts the tightening head device of the winding mechanism of the cast film machine disclosed in the existing Chinese patent (the announcement number is CN 201116244Y). The air cylinder is used as the driving force. Due to the limited installation space, the bore of the external air cylinder is small. As a result, when the diameter of the rewinding film is greater than 800mm, the weight of the film roll is large, and the output force of the air cylinder is not enough, resulting in the air cylinder not working normally. The collet cannot be disengaged from the winding shaft smoothly. In addition, since the external cylinder is connected to the sliding shaf...

AI Technical Summary

Problems solved by technology

[0002] At present, the tightening head device used for tightening the winding shaft in the winder generally adopts the tightening head device of the winding mechanism of the cast film machine disclosed in the existing Chinese patent (the announcement number is CN 201116244Y). The air cylinder is used as the driving force. Due to the limited installation space, the bore of the external air cylinder is small. As a result, when the diameter of the rewinding film is greater than 800mm, the weight of the film roll is large, and the output force of the air cylinder is not enough, resulting in the air cylinder not working normally. The chuck cannot be disengaged from the winding shaft smoothly

In addition, since the external cylinder is connected to the sliding shaft through the connecting shaft and the sliding seat, if the coaxiality of the connecting shaft and the sliding shaft is inconsistent, the rewinding shaft is likely to shake during work, resulting in unstable rotation

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