EP0140360A2 - Machine for automatically manufacturing double bags - Google Patents

Abstract

1. A machine for the automatic manufacture of double sacks, each sack comprising an outer sack made of a fabric, in particular a tubular fabric, and an inner sack made of a polyolefine film, in particular polyethylene film, essentially comprising at least one device (1) for the timed length-cutting and further transportation of a tubular, endless web of fabric for the formation of the outer sack (11) ; a device (2) for the timed lengthcutting and transportation and, if required, fusing of a bottom seam of a tubular run of film for the formation of the inner sack (22) ; and a device (3) for the automatic insertion of an inner sack (22) into an outer sack (11) for the formation of a double sack (33) and for the further transportation thereof, characterized in that the device (3) for the automatic insertion of an inner sack (22) into an outer sack (11) comprises a support (5) with free arms for taking up an inner sack (22) ; a reciprocating carriage (4) having a device for taking up and for spreading and slipping an outer sack (11) over the support (5), as well as a depositing table (7) for the double sack, disposed below the plane of motion of the sliding carriage (4).

Description

The present invention relates to a clothing machine for the automatic production of double bags, each consisting of an outer bag consisting of a fabric, in particular a round fabric, and an inner bag consisting of a polyolefin, in particular polyethylene film.

It is generally known that the most efficient way of making sacks is round weaving, whereby in addition to jute, in particular polyolefin, such as polypropylene (PP) or polyethylene (PE), which has been woven in the form of flat ribbons, has established itself as the sack material. Sacks made from such fabrics are chemical-resistant, water-insensitive, hygienic, breathable, rot-proof, etc.

In order to be able to use such woven sacks also for the finest grain and moisture-sensitive bulk goods, such as cement, it is known to coat the polyolefin fabrics before sewing or welding the bottom seam. Plants for such coating processes are very complex and not very profitable.

Appropriately, bags made of jute and polyolefin fabric are provided with an inner bag made of, for example, a tubular film made of polyethylene with a welded bottom seam.

Up to now, such inner bags have been introduced into the woven outer bags by hand, or a tubular film is guided into the take-off center of a circular weaving machine and surrounded there with the round fabric produced. During the first one. re process is labor-intensive, the second method brings considerable difficulties in the production of the bottom seam of the inner bag and its length adjustment with respect to the outer bag, as well as with respect to the fabric deduction on the circular loom.

It is therefore an object of the present invention to provide a confection machine for the automatic production of double sacks, each consisting of an outer sack consisting of a fabric, in particular a round fabric of any material, and an inner sack consisting of a polyolefin tubular film, which is suitable for all requirements highest working speed, opti painter automation across all assembly levels and space-saving and thus clear conception. In addition, the clothing machine according to the invention is intended to allow inner bags to be introduced into the outer bags, which can vary in length and width.

This is now achieved firstly by at least one device for the cyclical cutting to length and further conveying of an endless fabric web produced on a circular loom to form the outer bags; a device for rhythmic cutting to length and further conveying and optionally welding a bottom seam of a tubular film web to form the inner bags; and a device for inserting the inner sacks into an outer sack to form the double sacks and to further convey them.

Such a confection machine is initially able to spend both the outer sacks and the inner sacks optimally prepared in place of their assembly, put together there to form a double sack and then further conveyed to the finished assembly, for example by means of a sewing stage and a stacking device. This assembly is possible regardless of how long and wide the inner bag is with respect to the outer bag.

An expedient embodiment can be seen in the fact that the device for introducing an inner bag into an outer bag each means between a delivery point of the device for forming the outer bags and a delivery point of the device for forming the inner bags for placing or putting an inner bag on a free-arm console ; for spreading and pulling over a relevant outer sack over the console in question and the inner sack lying thereon or pulled over and for pulling off the double sack formed in this way from the console, which allows a relatively simple and thus clear and low-maintenance concept which can be further varied. For example, an arrangement in which the inner bag is also slipped over the free-arm console allows the edges of the bag mouths of the outer bag and inner bag to be welded or glued after the outer bag has been slipped on.

Optimal automation can also be achieved if the device for inserting an inner bag into an outer bag comprises a carriage that moves back and forth between a delivery point of the device for forming the outer bags and a delivery point of the device for forming the inner bags a first movement phase an inner bag from the be takes over the relevant delivery point and places it on a free-arm console and, in a second, opposite movement phase, takes over an outer bag from the relevant delivery point, the bag mouth of which opens and the outer bag is placed over the console and the inner bag stored there. Here, the other configuration of the confection machine may be such that the double bag before deposition of a subsequent _I nnensackes is drawn off to the console by the carriage itself during its first movement phase or by a gripper arm of the console and stored in a table below the plane of movement of the carriage .

In order to then bring the double bag into the new transport level formed by the table, it is expedient if the console for the removal of a double bag can be temporarily tilted or lowered towards the table in the machine cycle.

A high grip and functionally reliable training can also be seen in the fact that the carriage for receiving an inner bag or an outer bag and, if necessary, for spreading the bag mouth of the outer bag and optionally for pulling off the double bag from the console comprises suction heads, and furthermore if the slide can be adjusted transversely , for reaching into the mouth of an outer sack includes certain spreading fingers.

In order to be able to insert an inner sack of greater width into an outer sack, it is advantageous if the console has a contact surface which forms longitudinal folds on the inner sack lying thereon. In this case, the inner sack can be securely fixed on the console in that the console has vacuum channels which open out on its support surface and are connected to a vacuum pump.

For a safe, precise and timely shifting of the fully assembled and placed double bags on the storage table to the next treatment stage, e.g. the sewing line for the production of the bottom seam on the outer bag, it is also advantageous if on one and / or other edge of the storage table for the double bags Below the table level and at least approximately aligned with the relevant edge of the stored double bag, preferably continuously rotating transfer roller means are arranged, which interact with tip roller means which can be lowered in a clockwise manner above the table level, in order to cycle the double bags away from the table onto one of the roller means downstream cross transport table.

• Fig. l in schematischer Draufsicht eine erfindungsgemässe Konfektionsmaschine für die automatische Herstellung von Doppelsäcken;
• Fig. 2 die Anordnung gemäss Fig. 1 in Seitenansicht;
• Fig. 3 ein Detail der erfindungsgemässen Konfektionsmaschine, in grösserem Massstab; und
• Fig. 4 in schematischer Darstellung eine Ausführungsvariante der Anordnung gemäss Fig. 3.

An example embodiment of the subject matter of the invention is explained in more detail below with reference to the drawing. Show it:

• Figure l is a schematic plan view of an assembly machine according to the invention for the automatic production of double bags.
• Fig. 2 shows the arrangement of Figure 1 in side view.
• 3 shows a detail of the assembly machine according to the invention, on a larger scale; and
• 4 shows a schematic representation of an embodiment variant of the arrangement according to FIG. 3.

The assembly machine illustrated in FIGS. 1 and 2 for the automatic production of double sacks 33, each consisting of an outer sack 11 consisting of a polyolefin round fabric and an inner sack 22 consisting of a polythene tubular film, comprises here in series a device 1 for cutting to length and Conveying an endless fabric web 31 produced on a circular loom to form the outer bags 11; a device 2 for timed cutting and further promote and optionally welding a bottom seam of a tubular film web 32 to form the inner bags 22; and a device 3 for inserting the inner bags 22 in each case into an outer bag 11 for forming the double bags 33 and for further conveying them. This further conveying takes place in a transverse direction by means of a transverse conveying device 7, 15, 16 and a transverse transport table 18 to at least one sewing device 34, as will be explained in more detail below.

The device 1 for cutting and further conveying the outer bags 11 according to the cycle comprises, in a manner known per se, a so-called roll cutting machine 41, in which the fabric web 31 is continuously drawn off from the fabric web supply roll 31 'by means of motor-driven take-off rollers 42. The continuously removed fabric web 31 then arrives at a clamping plate table 43 and from there to a transport table 1 ', which forms a delivery point for the individual outer bag 11, as will be explained in more detail.

A clamping ruler 44 interacts with the clamping plate table 43, the drive means 45 of which are actuated in a predetermined cycle in order to temporarily secure this clamping ruler 44 Stopping the continuous fabric 31 from lowering and clamping the fabric sheet, whereupon a cut can be made on the fabric sheet 31 with the added knife 46, whereby a partial fabric sheet which forms the outer bag 11 is cut to length.

The endless fabric web 31 can also be supplied directly from the circular weaving machine with the deactivation of an intermediate storage on the roll 31 '.

In the same way, the device 2 for the cyclical cutting to length and further conveying of the inner bags 22 likewise comprises a roll cutting machine 41 ', in which the film 32 is continuously drawn off from the tubular film supply roll 32' by means of motor-driven pulling rolls 42 '. The continuously drawn film 32 then arrives at a clamping plate table 43 'and from there to a transport table 2', which forms a delivery point for the individual inner bag 22, as will be explained in more detail.

A clamping ruler 44 'interacts with the clamping plate table 43', the drive means 45 'of which are actuated in a predetermined cycle in order to lower this clamping ruler 44' for temporarily stopping the continuous film 32 and to clamp the film, followed by the subsequent one Knife 46 'a cut can be made on the film 32, with which a partial film, which forms the inner bag 22, is cut to length.

Between the cutting machine 41 'for the tubular film 32 to form the inner bags 22 and the downstream delivery point 2' there is expediently also a welding zone, not shown here, which allows a bottom seam to be welded to the inner bag 22.

According to the invention, the device 3 for inserting an inner bag 22 into an outer bag 11 each has means between the delivery point 1 'of the device 1 for forming the outer bags 11 and the delivery point 2' of the device 2 for forming the inner bags 22 for placing or putting one over each Inner bag 22 on a free-arm console 5; for spreading and putting on an outer bag 11 in question over the relevant console 5 and the inner bag 22 lying thereon or slipped thereon and for pulling off the double bag 33 thus formed from the console 5, as will be explained in more detail below and in detail.

In a first embodiment that can be seen in FIGS. 1 to 3, the device 3 for introducing each comprises one Inner bag 22 into an outer bag 11, a carriage 4 going back and forth between the two aforementioned delivery points 1 'and 2', which takes over an inner bag 22 from the relevant delivery point 2 'in a first movement phase and places it on the free-arm console 5 and in a second, opposite movement phase, an outer bag 11 takes over from the relevant delivery point 1 ', the bag mouth 11' of which opens and the outer bag 11 is placed over the console 5 and the inner bag 22 stored there. For this purpose, the carriage 4 comprises 5 suction heads 8 for receiving an inner bag 22 or an outer bag 11 and, if appropriate, for spreading the bag mouth 11 'of the outer bag 11 and, if appropriate, for pulling the double bag away from the console.

As can be seen in particular in FIG. 3, the carriage 4 here has cross-adjustable spreading fingers which are intended to engage in the bag mouth 11 'of an outer bag 11.

It is further provided according to the invention that the double bag 33 is pulled from the console 5 by the slide 4 itself during the first movement phase or by a gripper arm 6 and onto a table 7 below the plane of movement of the slide 4 before the storage of a subsequent inner bag 22 on the bracket 5 is filed. The console 5 can temporarily remove a double bag 33 and can be tilted or lowered against the table 7 in the machine cycle.

The arrangement here can be such that the slide guide 4 'on the side of the delivery point 1' for the outer bags 11 slopes downwards in order to achieve a lowering of the slide 4 to the lower level of the delivery point 1 'compared to the delivery point 2' , with which the relevant suction heads 8 can easily suck the upper web of the outer bag 11 in question at its bag mouth 11 'and open it in order to pull the open bag mouth 11' over the gripper fingers 9 (FIG. 3), which then spread the bag mouth 11 ' and hold until the carriage 4 has moved the outer bag 11 over the inner bag 22 arranged on the bracket 5 on its movement to the delivery point 2 'for the inner bag 22. The carriage 4 then moves in a controlled manner to the delivery point 2 'for the inner bag 22 and there takes up a ready-made inner bag 22 with the suction heads 8 mentioned and pulls it onto the console 5, of which the double bag 33 previously assembled, for example by means of the gripper arm 6 was subtracted. This pulling off can also be supported by a tilting movement of the console 5 against the storage table 7.

It is easy to see that the prepared inner bag 22 has a different length than the outer bag 11 and can be inserted at different depths therein.

However, the inner bag 22 can also vary in width in comparison to the outer bag 11 and, for example, be considerably wider.

In order to then gather this before inserting it into the outer bag 11, the support surface 5 'of the bracket 5 is provided with a saddle which forms longitudinal folds 22' on the inner bag 22 lying thereon.

Furthermore, negative pressure channels open at the support surface 5 'of the console 5, which can of course also be flat, which are connected to a vacuum pump 10 via a controller 10' (FIG. 3). This makes it possible to hold the inner bag 22 in question on the console 5 without further aids.

In particular with the arrangement according to FIG. 3, it is possible, by correspondingly controlling the suction flow from the center of the console to the side edges, to precisely fold the inner bag 22 along the saddle of the support surface 5 ' to reach the console 5 and thus shorten the bag width so that it can be easily inserted into the outer bag 11.

It is further provided according to the invention to preferably arrange continuously rotating transfer roller means 15 on one and / or other edge of the storage table 7 for the double bags 33 below the table level and at least approximately flush with the relevant edge of the stored double bag, which are arranged with clockwise lowerable above the table level Interacting tip roller means 16 in order to implement the double bags to move them cyclically from the table 7 to a transverse transport table 8 arranged downstream of the roller means 15 and 16.

These measures allow the double bag 33, which has been fully assembled and is applied to the storage table 7, to be shifted securely, precisely and in terms of cycle, which can then proceed to a next treatment stage, for example the aforementioned sewing line 34 for producing a bottom seam on the double bag.

From there, the double bags 33 can then be fed to a stacking stage or the like, which is not shown in detail.

The above now results in a clothing machine for the automatic production of double bags, each consisting of an outer bag consisting of a fabric, in particular a round fabric, and an inner bag consisting of a polyolefin, in particular polyethylene film, with which the highest working speeds with optimal automation can be achieved across all confection levels, whereby the confection machine presents itself as a space-saving, clear and very simple and thus practically maintenance-free concept that meets all the requirements presented with regard to changing dimensions of the inner bag and outer bag.

Of course, a large number of modifications are possible on such a clothing machine without departing from the concept of the invention, namely that the clothing machine is characterized according to the invention by at least one device for the cyclical cutting and further conveying of an endless fabric web produced on a circular loom to form the outer bags; a device for cyclical cutting to length and further conveying and optionally welding a bottom seam of a tubular film web to form the inner bags; and a device for inserting the inner sacks into an outer sack to form the double sacks and theirs Further funding.

For example, it is 4, it is possible to provide a turret 50 on the device 3 ′ for inserting an inner bag 22 into an outer bag 11, which here comprises four brackets 55 of the type described above. This turret 50 rotates, for example, clockwise in time with the machine and picks up an inner bag 22 at the delivery point 2 'of the device 2 for forming the inner bags 22 and then pivots through 90 ° to the delivery point 1' of the device 1 for forming the outer bags 11 is arranged here at right angles to the first-mentioned device 2. There, an outer bag 11 is slipped over the inner bag 22 and the relevant console 55. With a further rotation through 90 °, the console 55, which now carries a double bag 33, arrives at a station 51 at which, for example, the edges of the mouths of the inner bag and outer bag can be glued together. With a further swiveling of the turret 50, the relevant console 55 with the double bag 33 welded at its mouth then arrives at a device 54 for pulling off the double bag and for its further transport to the next treatment stage, for example the aforementioned sewing device (not shown).

With such an arrangement, the displacements towards and away from the consoles can take place by means of piston-cylinder systems equipped with suction means and / or gripper fingers, which means that special slides can be dispensed with. In addition, further treatment levels can be achieved with a turret head.

Furthermore, the device for gluing or welding the mouth edges of the inner and outer bags can of course also be provided on the bracket 5 of the arrangement described above according to FIGS. 1 to 3 (not shown).

Claims (10)

1. confection machine for the automatic production of double sacks, each consisting of an outer sack consisting of a woven fabric, in particular a round woven fabric, and an inner sack consisting of a polyolefin, in particular polyethylene film, characterized by at least one device (1) for cyclical cutting to length and further conveying a tubular endless fabric web to form the outer bags (11); a device (2) for cutting to length and further conveying and, if necessary, welding a bottom seam of a tubular film web to form the inner bags (22); and a device (3) for inserting the inner bags (22) in each case into an outer bag (11) for forming the double bags (33) and for further conveying them. 2. Clothing machine according to claim 1, characterized in that the device (3) for inserting an inner bag (22) into an outer bag (11) means between a delivery point (1 ') of the device (1) for forming the outer bags (11) and a delivery point (2 ') of the device (2) for forming the inner bags (22) for placing or putting on each an inner bag (22) on a free-arm console (5); for spreading and pulling over a relevant outer bag (11) over the relevant console (5) and the inner bag (22) lying thereon or pulled over and for pulling off the double bag (33) thus formed from the console (5). 3. Clothing machine according to claim 1 or 2, characterized in that the device (3) for inserting an inner bag (22) into an outer bag (11) between a delivery point (1 ') of the device (1) for forming the outer bags ( 11) and a delivery point (2 ') of the device (2) for forming the inner bags (22) reciprocating carriage (4) which, in a first movement phase, an inner bag (22) from the relevant delivery point (2' ) takes over and places it on a free-arm console (5) and takes over an outer sack (11) from the relevant delivery point (7 ') in a second, opposite movement phase, its sack mouth (ll') opens and the outer sack (11) over the console ( 5) and the inner bag (22) placed there. 4. Clothing machine according to claims 1 and 3, characterized in that the double bag (33) before the Abla ge of a subsequent inner bag (22) on the console (5) by the carriage (4) even during its first movement phase or by a gripper arm (6) from the console (5) and on a table (7) below the plane of movement of the carriage (4) is filed. 5. Clothing machine according to claim 4, characterized in that the console (5) for pulling off a double bag (33) temporarily and in the machine cycle against the table (7) can be tilted or lowered. 6. Clothing machine according to claim 3 or 4, characterized in that the carriage (4) for receiving an inner bag (22) or an outer bag (11) and optionally for spreading the bag mouth (11 ') of the outer bag (11) and optionally for pulling of the double bag (33) from the console (5) comprises suction heads (8). 7. Clothing machine according to claim 3 or 4, characterized in that the carriage (4) comprises cross-adjustable spreading fingers (9) for engaging in the bag mouth (11 ') of an outer bag (11). 8. Clothing machine according to claim 2 or 3, characterized characterized in that the console (5) has a bearing surface (5 ') forming longitudinal folds (22') on the inner bag (22) lying thereon. 9. Clothing machine according to claim 3 or 8, characterized in that the console (5) on its bearing surface (5 ') has negative pressure channels opening out, which are connected to a vacuum pump (10). lO. Clothing machine according to claim 4 or 5, characterized in that at one and / or other edge of the storage table (7) for the double bags (33) below the table level and at least approximately flush with the relevant edge of the deposited double bag, preferably continuously rotating transfer roller means ( 15) are arranged, which interact with tip roller means (16) which can be lowered in cycles above the table level, in order to cycle the double sacks away from the table (7) onto a transverse transport table (18) arranged downstream of the roller means (15 and 16) to implement.

Images