Universal tensile covering film packaging machine

Abstract

The invention discloses a universal tensile covering film packaging machine which is used for wrapping a pre-tensioned cylindrical thin film on goods. The packaging machine comprises a film coil bracket (1), a lifting mechanism (2), a tensioning mechanism (3), a film feeding mechanism (4), a thin film heat-sealing and cutting mechanism (5), a main frame (6), a transmission mechanism (7) and the like, wherein the main frame (6) has a frame-shaped structure with four pieces of upright posts; the film coil bracket (1) is positioned on the outer side of the main frame (6); the film feeding mechanism (4) is positioned on the top of the main frame (6); the thin film heat-sealing and cutting mechanism (5) is positioned below the film feeding mechanism (4); the transmission mechanism (7) is positioned on the ground on the inner side of the main frame (6); the tensioning mechanism (3) is driven by the lifting mechanism (2) to perform rising and falling motions; left and right movable beams of the tensioning mechanism (3) are provided with upper and lower sliding racks; and the sliding racks are provided with film collecting and releasing mechanism and a film sucking mechanism. Because the film collecting and releasing mechanism and the film sucking mechanism are positioned on the same sliding rack, the tensioning mechanism (3) can automatically adapt to the cylindrical thin films of different widths by only adjusting the relative distance between the upper and lower sliding racks.

Description

technical field [0001] The invention relates to a packaging device for wrapping a cylindrical film on goods after pre-stretching, and belongs to the field of packaging machinery. Background technique [0002] With the improvement of the quality requirements for goods packaging, pre-stretch film packaging technology has gradually been widely used due to its high efficiency, energy saving and environmental protection characteristics. Patent document 200520089353.X discloses a stretch hood packaging machine, but the suction film mechanism of this stretch hood packaging machine is only suitable for a film of one specification. When the size specification of the film changes, due to the suction The film mechanism cannot be adjusted accordingly, which will greatly limit the use of this stretch hood packaging machine; since the weight of the goods that need to be lifted by the transmission jacking mechanism is generally more than one ton, its structure is also relatively complicate...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the existing stretch hood packaging machine cannot automatically adapt to the change of film width and size, and the system structure is complex, which causes low reliability, and provides a general-purpose stretch hood packaging machine that can automatically Adapt to changes in film width and size, while the system has a simple structure and high reliability

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