Lower film gravity pretightening device of full-automatic stretch film packer

Abstract

The invention discloses a lower film gravity pretightening device of a full-automatic stretch film packer. The device comprises a frame, a film guide film, a guide frame, a gravity pretightening roller and an air inflation shaft, and is characterized in that the film guide roller is arranged at the upper part of the front side of the frame, wherein the guide frame is arranged below the film guide roller; the gravity pretightening roller is arranged in the guide frame; the guide frame penetrates through the two ends of the gravity pretightening roller; the air inflation shaft is arranged at the front side of the lower end of the guide frame; and the film guide film, the guide frame, the gravity pretightening roller and the air inflation shaft are positioned at the same side of the frame. The device has the following beneficial effects: a film is always located in a pretightened state to be difficult to form drapes by using a gravity principle; the equipment synchronization rate is high; the failure rate is reduced; and the production efficiency is improved.

Description

Technical field [0001] The invention relates to a tensioning device, in particular to a gravity pretensioning device for a lower film of a stretch film packaging machine. Background technique [0002] At present, the lower film pre-tensioning device of the ordinary stretch film packaging machine is realized by a spring-connected swing arm system. Due to the instability of the spring, the film will rebound or be uneven when controlled by the spring swing arm. The deviation and instability of the film during the film process affect the synchronization rate of the work and the production efficiency. Summary of the invention [0003] The purpose of the present invention is to provide a new type of gravity pre-tensioning device, which uses gravity to tighten the stretched film under the action of gravity when pre-tensioning is required, so as to solve the problems caused by rebound or uneven tension. During the filming process, the film runs off and is unstable, which affects the work...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new type of gravity pre-tensioning device, which utilizes the effect of gravity. When pre-tensioning is required, the stretched film is tightened under the action of gravity, so as to solve the problems caused by rebound or uneven tension. During the filming process, the deviation and instability of the film will affect the synchronization rate of the work and affect the production efficiency.

Images