Automatic fast rewinder for shaftless packing film

Abstract

An automatic fast rewinder for shaftless packing film includes a body, a feeding box for containing inflated shafts, a guide passage formed in the feeding box, a pair of rotary discs, four pairs of pinching heads, a support frame for holding a large roll of packing film, plural guide wheels and a pressing wheel for pressing and move packing film of the large roll, a saw-teeth cutting unit, and a collect unit and plural inflatable shafts. In operation, the four pairs of pinching pins rotating with the rotary discs are moved orderly to pinch or release the inflatable shaft to rewound with packing film of the large roll, cut by the cutting unit, then dropped down on the collect unit. So the finished small rolls with the inflated shafts have inflated shaft deflated and pulled out so the finished small roll becomes a small roll without a winding shaft.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This invention relates to an automatic fast rewinder for shaftless packing film, particularly to one rewinding a large packing film roll into plural small packing film rolls without a winding shaft, shortening time needed for rewinding, stepping up production and saving cost with environmental friendly effects.[0003]2. Description of the Prior Art[0004]Packing films are generally made by rewinding a large packing film roll into plural small packing film rolls by means of a rewinder to facilitate using packing film. A conventional rewinder for this purpose shown in FIGS. 1 and 2 includes a body 10, a support frame 11 fixed on the body 1 for holding a large packing film roll (a) thereon, plural guide wheels 12 and a pressing wheel 13 installed on the body 1 for moving the packing film of the large roll. Then the packing film (a) of the large roll is pulled by rotation of the guide wheel pressed down by the pressing wheel ...

AI Technical Summary

Benefits of technology

[0007]The purpose of the invention is to offer an automatic fast rewinder for shaftless packing film, which can rewind a large roll of packing film into four small rolls with one rotation of a rotary wheel, shortening time needed for rewinding, boosting production and efficiently protecting the environment with no waste of winding shafts by using reusable inflatable shaft for rewinding work.

Problems solved by technology

The conventional rewinder can rewind the packing film (a) into only one small film roll by one round of operation, so its production is slow, not effective.

Moreover, the winding shaft (b) has to be discarded after the mall packing film roll is used up, making a waste to polluting the environment, with the cost for the winding shafts lost.

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