JPS6292835A - Stacker for piling bag manufactured from thermoplastic film during production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates in particular to the production of bags made from thermoplastic films, such as the so-called 'shopping bag' type, with handles, by means of transverse welding and cutting or pre-cutting equipment. The present invention relates to an apparatus for stacking continuously manufactured articles for arrangement in bundles or stacks.

To achieve the above objects, the present invention provides a method for making bags made from thermoplastic films or similar articles without relying on bottles or other members to puncture or tear the material 4 and/or welds. A device for stacking so as to form a dip pile during its manufacture, wherein the devices act alternately to hold the articles in cooperation with a crosspiece on which the articles are successively deposited. The first presser is raised to allow the freshly produced articles to be piled up, while the other presser is closed to the track of the articles to be piled up to accommodate the piled articles. Acting on the end, in other working conditions 1111 the first presser is lowered and acts on the +fi product during the stopped state of advancement of the new article, while the other presser is raised and just piled up. The present invention provides a device for stacking bags, characterized in that it receives the ends of the articles.

In fact, the first presser moves and acts more or less perpendicular to the forward trajectory of the articles to be stacked, while the other presser acts more or less parallel to said trajectory and below it.

The other presser is movable at an angle or raised sufficiently to allow the end of the article to be located between the crosspiece and the breather itself. It's advantageous.

To ensure a rapid cycle, a blowing device may be provided to facilitate positioning and cooling of the edges of the freshly stacked articles. It is also possible to provide other devices for said cooling, such as a radius wing coke.

The invention may be better understood by reference to the following description of the invention and the accompanying drawings, which show non-limiting examples of the invention.

With reference to the accompanying drawings, M indicates tubular material fed in the direction of arrow f at the end of the device (diagrammatically illustrated);
The tubular material M has two longitudinal bellows or gusset folds along its ends to produce a so-called "grocery bag" type bag with a pair of hanging handles. code 1
2 and 14 indicate welding and cutting elements that perform transverse, close welds and complete cuts over the entire length of the material. The device 12.14 comprises a fixed lower part 12 and an upper part 14 which is cyclically movable away from the lower part and down to the lower part; Perform two lateral welds by cutting and a pair of welding members installed along the blade.

In addition to the cutting and double welding equipment designated by 12 and 14, a system is provided for stacking the articles produced from the respective processed materials.

In the embodiment shown in FIGS. 1-4, a system is provided for collecting the cut articles and engaging the articles being deposited via a bulk volume forming-presser device. Reference numeral 16 designates a crosspiece, followed by an inclined movable table 18; a presser 20 is connected to the crosspiece 1.
horizontally on the side of G (i.e. parallel to the - direction)
In operation, the presser 22 operates vertically (ie at right angles to the directions f, I) and acts on the upper surface of the crosspiece 16 or otherwise cooperates with the crosspiece 16 .

The device is such that a layer of stacked articles forming a bundle is held by a presser 20, while a blender 22 is being picked up during the 11th stage of the material of the articles to be later stacked; as the presser 22 is lowered. The presser 20 is energized and moved away, causing the trailing end of the just-formed article to be removed from the cross piece 1.
6 and a presser 20 (FIG. 3) already separated therefrom, said article then engages itself in the presser 20 with which it is withdrawn again against one crosspiece 16 with deposition during forming. It's like doing.

The presser 20 can be angularly stationary so as to create a wide space for the back end of the freshly formed article to descend.

Appropriate mechanical, pneumatic or other types of devices may be provided to speed up the lowering of the rear end, i.e. the inner end of the article to be subsequently quickly engaged by the presser 20. In the figures, a device is provided for obtaining air jets from the tips of two nozzles 26 and 28.

In the apparatus of FIG. 1, material M advances in the direction of arrow f. In the condition shown in FIG.
4, reaches the intended length of the product from which the sock bag is to be made, and the welding and cutting rod 14 approaches it by descending towards the section 12. In the apparatus of FIG. 3, the material is at rest; rod 14 cuts transversely into the material and welds it on the side of the cut. In the apparatus of FIG. 4, the welding and cutting rod 14 is raised again and the material begins to move again.

The individual products are separated from the materials and shown in Figures 1 and 2.
In the state shown, the presser 22 is lifted, allowing advancement of the material on the crosspiece 16 and on the inclined plate 18, - the impulse presser 20 is energized. Third
In the illustrated device, instead, a switching of the action of the two pressers is shown, such that while the presser 22 is energized, the presser 20 leaves at -F, where the rear end of the +4 charge M
P is lowered and pushed down in the direction of the arrow f9 by the jet of the nozzle 2G, and forced to the side of the crosspiece 16; the operating state of the presser 20 and the rise of the presser 22 are shown in FIG. The jet of the nozzle 28 facilitates the reaching of the end MP onto the crosspiece 16 as well as the cooling of the weld. To facilitate cooling purposes, a rotor may also be provided with a radial plane separating the end MP of the succeeding article from the preceding article at any time.

The accompanying drawings serve as a practical demonstration of the invention and are subject to changes in type and arrangement without departing from the concept disclosed herein.

[Brief explanation of drawings]

1 to 4 are diagrammatic illustrations of the device of the invention in four states of its working cycle; FIG.

Claims (1)

Claims: 1. Bags made from thermoplastic films or similar articles can be deposited during manufacturing without relying on pins or other members to puncture or tear the material and/or welds. an apparatus for stacking articles, said apparatus comprising two pressers which act in alternation to hold the articles in cooperation with a cross-piece on which the articles are successively placed;
one presser is raised to allow the passage of newly produced articles to be stacked, while the other presser acts on the end of the stacked articles in a closed manner with respect to the trajectory of the articles to be stacked, and from thermoplastic films, etc., characterized in that one presser is lowered to act on the stacking of new articles during the stopped state of advancement, while said other presser is raised to receive the ends of said articles to be newly stacked. A device that stacks the bags being made so that they are piled up during manufacturing. 2. Device according to claim 1, characterized in that the first presser moves and acts more or less at right angles to the forward trajectory of the articles to be stacked. 3. characterized in that said other presser is movable at an angle or capable of making a stroke or displacement that allows the end of the article to be located between the crosspiece and said presser; , an apparatus according to any one of claims 1 or 2. 4. Any one of claims 1 to 3, characterized in that the device is equipped with a blowing device that facilitates the positioning of the edges of the newly stacked articles and the cooling of the welds. The device according to item 1.