DE202009014336U1 - Tubular bag machine for producing and filling tubular bags - Google Patents

Abstract

A bagging machine with a device for producing longitudinal seams, with a removal unit (2) for packaging material, with a forming shoulder (2.2), which surrounds packaging material around a format tube (3) for forming and filling tubular bags, with a longitudinal sealing device (4), as an ultrasonic longitudinal sealing device incorporated in the format tube (3) is formed with an anvil (4.1) and a sonotrode (4.2) in order to seal a first and a second longitudinal edge of the packaging material to one another in an overlapping sealing seam, characterized in that the anvil ( 4.1) of the sonotrode (4.2) is installed at the level of the forming shoulder (2.2) in the wall of the format tube (3).

Description

The The invention relates to a tubular bag machine with a device for the production of longitudinal seams, with a transport unit for packaging material, with a forming shoulder, the packaging material around a format tube for forming and filling tubular bags wraps around, with a longitudinal sealer acting as a in the format tube built-in ultrasonic longitudinal seal with an anvil and a sonotrode is formed to a first and second longitudinal edge of the packaging material with each other to seal to an overlapping seal.

such Tubular bag machines are used for manufacturing and filling of tubular bags, which are used for packaging and free-flowing, free-flowing products become. Tubes as packaging are variable in their applications both in economic and in ecological View as it ensures an economical handling of the packaging material is.

Tubular bag machines are known from the prior art in different versions. In general, tubular bag machines are used to form a bag from a flat packaging material, in particular using a heat-sealable plastic film, which can then be filled with a filling material. For this purpose, in the production of such tubular bags, a film is pulled from rolls, passed over a forming shoulder to a format tube, and formed into a tube with overlapping longitudinal edges. The tube thus formed encloses a filling tube adapted to its shape. The overlapping edges are connected by means of an ultrasonic sealing device to a longitudinal seam and the hose is closed on the long side, as shown in DE 10 2006 041 966 B3 is known. In this document, an anvil is integrated into the filling tube, wherein the anvil has guide portions in which the longitudinal edges of the foil to be sealed are guided. The guide portions are formed as grooves, and inserted into the anvil so that they overlap. Hereby, the longitudinal edges of the film are guided in front of the sealing point within the anvil so that they are sealed at the sealing point overlapping each other.

adversely on such devices is that the edges of the used Threaded foil into the guide sections of the anvil must be, thus a seal of the longitudinal seam can be done. Depending on the nature of the film can buckling the foil edges in the guide sections, Throw wrinkles and thus not parallel in the sealing device be guided, bringing an overlapping leadership the film edges are no longer given and leaking bags the Consequence are.

Of the The present invention is therefore based on the object, a device for the sealing of longitudinal seams, which in particular has a better longitudinal seal and thereby reliably provides tightness at high throughput.

The said object is in a device of the aforementioned Art solved by the fact that the anvil of the sonotrode at height the forming shoulder is built into the wall of the format tube.

to Integration of the anvil within the format tube looks a special preferred embodiment of the invention that the format tube a elongated rectangular opening in height the forming shoulder has, in which the anvil is integrable, the anvil protruding above the forming shoulder into the format tube, and that an oblong flat rectangular shaped the Sonotrode opposite opposite of the anvil along formed the edge of the format tube to the sonotrode extending is. Furthermore, it is provided in a preferred embodiment, that a first and a second edge of the form shoulder centered in front the opening merged overlapping are. As a result, the film is in the appropriate shape of the tubular bag drawn with a so-called lap-seal seam, whose edges overlap flat to save space are laid. By the arrangement of the longitudinal sealing device at the height of the form shoulder is the overlap the not yet sealed foil in the longitudinal edge region overlapping relieved, as a seal immediately after the merger the edges of the film takes place.

In a particularly preferred embodiment is provided that the format tube an inner strip-shaped cover having the anvil covered, wherein one side of a Inwardly rectangular shaped bulge to protect the anvil having. This will ensure that through the format tube falling contents can pass unhindered through the anvil, without the contents getting caught on the same and can accumulate. Furthermore, the inner cover be designed so that the side of the anvil more functionalities, such as B. Equipment for product fumigation, dust extraction o. Ä., Are integrable. Thus the US longitudinal sealing device properly controllable is preferably provided that the US longitudinal sealing device an electronic control system is assigned.

The transport unit has a film unit, in which packaging material can be stored and fed to a forming shoulder. In a special preferred embodiment, it is provided that the packaging material is a film which is withdrawn from the film unit within the transport unit, for example a film roll, and guided over the forming shoulder to the format tube. The edges of the film are overlapped on top of each other, based on the also overlapping edges of the forming shoulder in the transport direction, wherein the end portion of the forming shoulder is formed as a sleeve and thus holds the film closely to the format tube. Immediately thereafter, the film is passed through the longitudinal sealing device. By means of the sonotrode, the film edges are sealed together, creating a flat, space-saving Lap-Seal seam. A reliable longitudinal sealing of the film edges is thus given.

By The present invention will be a simplified tubular bag machine with a longitudinal seal for a flat overlapping Sealing seam by means of a drop height reducing ultrasonic device provided. An optimal web edge guide of the film edges is due to the combined arrangement of forming shoulder and Längssiegeleinrichtung supported. A divergence of the film edges is by the immediate sealing after the merger the foil edges completely avoided. It is therefore not Threading the foil into the anvil more necessary, as well as a complicated anvil milling. Another Advantage arises because of the even more compact design by the possibility of reducing the fall height for the contents, which also means faster packaging the contents is possible.

Further Advantages and features emerge from the claims and from the following description, in which an embodiment of the invention with reference to the drawings in detail is explained. Hereby shows:

1 a perspective view of a device according to the invention with a longitudinal sealing device;

2 a side view of the device according to the invention;

3 a view of the device according to the invention from the front;

4 a vertical longitudinal section through the device according to the invention and;

5 a schematic view of the device according to the invention from above, wherein parts are shown in dashed lines inside the device; and

6 a perspective view of the device according to the invention with an inner cover.

1 shows a device according to the invention 1 for a tubular bag machine for producing a longitudinal seam. This includes a transport unit 2 for web-shaped packaging material, preferably a film, a format tube 3 with a circular cross section and an ultrasonic or US longitudinal sealing device 4 ,

The transport unit 2 has a film unit 2.1 which stores and feeds the film, and one on the format tube 3 attached form shoulder 2.2 on (in 1 only partially shown), through which the film to a tube around the format tube 3 is moldable and drawable. The form shoulder 2.2 has in a conventional manner one of the supplied foil facing shoulder blade with a substantially flat inlet region, as in 2 and 3 represented, and encloses in the conveying direction of the film A with downwardly directed legs of the format tube 3 the machine, which serves as a filling tube for filling until it surrounds this as a one-sided shouldered sleeve (see 1 and 4 ). The outer edges of the form shoulder 2.2 are merged such that a first edge 2.3 the form shoulder 2.2 under a second edge 2.4 the form shoulder 2.2 is placed, bringing the foil, which over the forming shoulder 2.2 can be pulled, when enclosing the format tube 3 shows an overlap of her foil edges. Furthermore, the transport unit 2 a take-off device (not shown) to continue the film laid around the format tube. The trigger device is driven by a motor.

The US longitudinal sealer 4 is on the format tube at one below the forming shoulder 2.2 arranged bow 3.1 at the height of the form shoulder 2.2 attached and has an anvil 4.1 and a sonotrode 4.2 on. The anvil 4.1 is how in 4 is shown in a vertical longitudinal section, formed substantially in one piece, wherein a perpendicular to the anvil 4.1 downwardly elongated trained opposite 4.3 of the anvil 4.1 to the sonotrode 4.2 into the interior of the format tube 3 protrudes.

The format tube 3 has for this purpose an elongated rectangular opening 3.2 on, which is cut out so that the anvil 4.1 in the format tube 3 is used and the opposite 4.3 in the format tube 3 protrudes. The opening 3.2 is hereby arranged so that an upper edge of the opening 3.2 so far above the merging edges 2.3 . 2.4 the form shoulder 2.2 is milled, so that when anvil is inserted no contact between anvil 4.1 and the form shoulder 2.2 as well as the format tube is given. The opening 3.2 runs in the wall of the format tube 3 down in the conveying direction A to below the sealing area between counter camp 4.3 of the anvil 4.1 and the sonotrode 4.2 , The counter bearing 4.3 of the anvil 4.1 is formed in a flat rectangular elongated shape and closes flush with the bottom of the sonotrode 4.2 from. The sonotrode 4.2 is by means of a holder here directly after the lower end of the forming shoulder 2.2 arranged in the overlapping region of the film edges. Between sonotrode 4.2 and opposite 4.3 of the anvil 4.1 is a gap 4.4 provided as a sealing area, through which the film is pulled and the overlapping superimposed film edges are sealed. Directly behind the merging of the film edges by means of the forming shoulder 2.2 the sealing of the longitudinal seam takes place. This ensures that a seal of the film edges is provided directly after the merger of the film edges.

The 5 shows the device 1 in a frontal view from above, with hidden inside parts of the device 1 are indicated by dashed lines. To protect the in the format tube 3 protruding anvil 4.1 is inside the format tube 3 an inner cover 3.3 arranged. An anvil 4.1 facing side of the inner cover 3.3 has a bulge in rectangular cross-section of sheet metal (not shown) corresponding to the interior of the format tube 3 directed contour in the form of the thrust bearing 4.3 of the anvil 4.1 on.

The inner cover 3.3 is in the 6 in its perspective view of the device 1 shown, with the format tube 3 is shown transparent. The inner cover 3.3 can be formed bevelled in the upper region, the slope of the format tube 3 to the width of the opposite 4.3 of the anvil 4.1 enough. After that, the bulge runs parallel to the opposite 4.3 and terminates below it at right angles. The length of the inner cover 3.3 is at least such that a complete coverage of the contrary 4.3 of the anvil 4.1 inside the format tube 3 is given, so that no filling material on the anvil 4.1 can get stuck. The inner cover 3.3 may be further configured so that the side of the anvil 4.1 Space for further functionalities is such. B. other measuring equipment.

The present invention describes a simplified tubular bag machine which is characterized by a combination of the longitudinal sealing device 4 with the form shoulder 2.2 especially in a simple manner produces a reliably tight longitudinal seam on the overlapping guided film edges.

LIST OF REFERENCE NUMBERS

1

contraption

2

transport unit

2.1

film unit

2.2

forming shoulder

2.3

first edge

2.4

second edge

3

forming tube

3.1

hanger

3.2

opening

3.3

inner cover

4

Longitudinal sealing device

4.1

anvil

4.2

sonotrode

4.3

thrust bearing

4.4

gap

A

conveying direction

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 102006041966 B3 [0003]

Claims (8)

Tubular bag machine with a device for the production of longitudinal seams, with a trigger unit ( 2 ) for packaging material, with a forming shoulder ( 2.2 ), the packaging material around a format tube ( 3 ) for forming and filling tubular bags, with a longitudinal sealing device ( 4 ), which as one in the format tube ( 3 ) built-in ultrasonic longitudinal seal device with an anvil ( 4.1 ) and a sonotrode ( 4.2 ) is formed to seal a first and a second longitudinal edge of the packaging material together to form an overlapping sealing seam, characterized in that the anvil ( 4.1 ) of the sonotrode ( 4.2 ) at the level of the shoulder ( 2.2 ) in the wall of the format tube ( 3 ) is installed. Tubular bag machine according to claim 1, characterized in that the format tube ( 3 ) an oblong rectangular opening ( 3.2 ) at the height of the forming shoulder ( 2.2 ), in which the anvil ( 4.1 ) is integrated. Tubular bag machine according to one of claims 1 or 2, characterized in that the anvil ( 4.1 ) above the forming shoulder ( 2.2 ) in the format tube ( 3 ) protrudes, and that an elongated flat rectangular shaped the sonotrode ( 4.2 ) opposite abutment ( 4.3 ) of the anvil ( 4.1 ) along the edge of the format tube ( 3 ) to the sonotrode ( 4.2 ) is formed extending towards. Tubular bag machine according to one of the preceding claims, characterized in that a first and a second edge ( 2.3 . 2.4 ) of the form shoulder ( 2.2 ) in the middle of the opening ( 3.2 ) are merged overlapping. Tubular bag machine according to one of the preceding claims, characterized in that the ultrasonic longitudinal sealing device ( 4 ) on a bracket ( 3.1 ) on the format tube ( 3 ) is held. Tubular bag machine according to one of the preceding claims, characterized in that the format tube ( 3 ) an inner cover ( 3.3 ) having the anvil ( 4.1 ) covered. Tubular bag machine according to one of the preceding claims, characterized in that the inner cover ( 3.3 ) is strip-shaped, wherein one side has an inwardly rectangular shaped bulge for protecting the anvil ( 4.1 ) having. Tubular bag machine according to one of the preceding claims, characterized in that the longitudinal sealing device ( 4 ) is assigned an electronic control system.