DE102005018405B4 - Drive device for a sealing station - Google Patents

Abstract

Drive device for a sealing station, comprising at least one positioning device (90, 108) for feeding in packaging material (96) to be sealed. Articles (98) having at least one sealing station (80, 102, 106) which connects at least one article (98) to be sealed with the packaging material (96), wherein the sealing station (80, 102, 106) comprises at least one sealing stamp (80) in which a drive (114) moves, characterized in that coupling means (86, 88) are provided for the mechanical coupling of the positioning device (90, 108) to the drive (114).

Description

State of the art

The invention relates to a drive device for a sealing station according to the preamble of claim 1. It is known to operate positioning and sealing stamp, each with separate drives, for example by two Nutkurven (fast-running packaging machine) or by pneumatic drives in medium and slow-running packaging machines , In addition, a positioning device can be dispensed with if the removal of the objects to be sealed takes place directly from the jam.

It is an object of the invention to further simplify the above-mentioned device. This object is solved by the features of the independent claim.

Advantages of the invention

The drive device according to the invention for a sealing station comprises at least one positioning device for feeding articles to be sealed in packaging material. At least one sealing station is provided, which seals the articles to be sealed with the packaging material, wherein the sealing station comprises at least one sealing stamp which a drive moves. According to the invention coupling means are provided for the mechanical coupling of the positioning with your drive. In contrast to the solutions with separate drives, complex synchronizations of positioning device and seal punch movement are eliminated. There are cost and assembly time savings achieved by fewer components.

Compared to solutions without separation or positioning, a reduction of the process time is achieved because the Nachfördern the objects to be sealed under the seal stamp takes place during and not after its upward movement. It is achieved with the same number of drives a significant increase in output and process reliability. Incidentally, commissioning is also simplified because only one drive is programmed.

Further advantages and advantageous developments of the drive device according to the invention for a sealing station result from the dependent claims and from the description.

drawing

An embodiment of the invention is illustrated in the drawing and will be explained in more detail in the following description. Show it 1 a perspective view of a self-operating application module without displaying the packaging material,

2 a side view of the application module with foil, but without frame,

the 3 an isometric representation of in 2 shown arrangement,

the 4a and 4b the drive device according to the invention in a schematic representation of different operating conditions of the sealing station, namely 4a during the welding, 4b while reloading an item to be sealed,

such as 5 a drive device for a sealing station in perspective view.

Description of the embodiment

An independently operating application module 10 consists of a frame 12 with screwed on control cabinet 14 , integrated control and display terminal 16 and own protection. A packaging material roll suspension 18 and a cutting and gluing table 20 is decoupled from the existing packaging system and on the rack 12 attached. An advance 22 who have a packaging material 13 such as a film continuously in a film storage 24 enters, and a servo motor driven vacuum film preference 26 that's out of the slide storage 24 the packaging material 13 intermittently prefers, form the packaging material preference. For the exact placement of the object to be sealed in, such as a valve, the film preference works 26 with a print mark control 30 , Between foil storage 24 and vacuum film preference 26 are a servo motor driven sealing station 32 and a foil cutting station 34 accommodated. The sealing station works to reduce the process time 32 in the ultrasonic method by means of an ultrasonic welding device 36 , An electromagnetic vibratory conveyor 38 for sorting and feeding the items not to be sealed into the sealing station 32 is on the cover plate of the frame 12 placed. The signal exchange to the downstream machine takes place via potential-free contacts. The sealing station 32 the articles to be sealed are fed via a feed chute 40 from the vibratory conveyor 38 fed. The sealing station 32 is a web edge control 44 upstream. The now provided with the sealed objects slide 13 leaves the independently operating application module 10 via a foil transfer 42 , which is equipped for example with a rocker to maintain the web tension. A separate controller for the application module 10 is in a control cabinet 14 that with the frame 12 connected, housed.

The independently operating application module 10 is used in particular for the connection of internal coffee degassing valves with a packaging material 13 such as a foil. These valves are powered by a vibrating conveyor 38 the application module 10 fed. The packaging material provided with the valves 13 can then be supplied to other packaging machines such as tubular bag machines for producing and filling a coffee bag. The provision of an independently operating application module 10 simplifies the retrofitting of existing packaging machines and serves to decouple the upstream and downstream process. Like that 2 and 3 to remove, there is the packaging material roll 11 in the packaging material roll suspension 18 , The foil 13 passes over pulleys to the cutting and gluing table 20 , Will be the end of a packaging roll 11 recognized, so the cutting and gluing table serves 20 the connection of the outgoing film web with the beginning of a new film web of a new packaging material roll 11 , The foil 13 will be about the preprocessing 23 the foil store 24 fed. According to the invention is suitable for application modules 10 with high performance a so-called airbag film storage. This per se known Folienspeicherart also includes a taking place for example via a photocell control and a vacuum brake to maintain the desired film tension. A chicane is used for clean film guidance. By working on the airbag principle foil storage 24 can achieve very short feed times. In principle, however, other types of known film storage 24 conceivable. From the film store 24 the film arrives 13 to the foil cutting station 34 , The foil 13 is cut at the point where later in the sealing station 32 the valve is sealed with the foil sealed. Subsequently, the film is intermittent the sealing station 32 fed. The valves pass through the vibratory conveyor 38 and the feed chute 40 to the sealing station 32 , By means of a positioning device, the valve is brought into the desired sealing position over the incision in the film 13 , The valve is supplied to a seal die, which is brought in a vertical direction in a sealing position. In sealing processes, for example, thermal processes are used which, conventionally or via ultrasound, generate heat. In the shown application module 10 According to the invention, an ultrasonic welding device 36 used, which allows very short welding cycles. In principle, however, other methods are conceivable. The vacuum film preference 26 is, for example, driven by a servo motor and pulls the film 13 intermittently from the film storage 24 , However, the intermittent sheeting may also be produced in a manner other than vacuum. The vacuum pump 28 , which is also part of the application module, provides the required vacuum.

Instead of valves as objects to be sealed, also reclosures, ZIP-closures or the like can be applied, which are sealed / glued, or any other objects.

In the following, now the drive device of the sealing station 32 based on 4a . 4b and 5 described in more detail. In an upper area of a seal stamp 80 is a groove 82 attached, in which is a roller 84 located, via a drive lever 86 with a drive 114 is mechanically coupled. A coupling rod 88 is directly or indirectly via a bearing with the drive lever 86 connected. The coupling rod 88 actuates a slider 90 in horizontal direction, supported by horizontal linear bearings 92 , You can continue 1a Take the seal eccentricity Esi and the slider eccentricity Esc. The slider 90 is able to seal the object 98 in the in 1a shown welding position to bring. Vertical linear bearings 94 allow a vertical movement of the seal stamp 80th Between seal stamp 80 and welding device 102 becomes packaging material 96 introduced, which moves in the direction of the arrow. For welding the objects to be sealed 98 with the packaging material 96 there is the seal stamp 80 in a lower position.

In the 4b shown components of the sealing device are those of 4a identical. In 4b is only the reloading position 104 shown. The seal stamp 80 is now in an upper position, so the object to be sealed 98 through the slider 90 below the seal stamp 80 can be brought. The corresponding eccentricities Esi, Esc to achieve such a state of motion can also be 4b remove.

In 5 the perspective embodiment of the sealing station is shown. The drive 114 moved over the drive lever 86 the roller 84 located inside the oval-shaped groove 82 according to the geometry of the groove 82 the seal stamp 80 can move. The groove 82 is part of a seal holder 106 that with the seal stamp 80 connected is. Vertically mounted shafts 112 allow a vertical movement of the seal stamp 80 with associated seal holder 106 , The slider 90 is from a slider holder 108 carried, in turn, over horizontally mounted waves 110 the displacement of the slider 90 in the vertical direction allows. This vertical movement is caused by a vertical movement of the seal holder 106 over the coupling rod 88 performed.

The up and down movement of the seal stamp 80 takes place via the eccentrically driven roller 84 in the horizontal groove 82 in the seal stamp holder 106 is guided. The seal stamp holder 106 is mounted vertically in a housing (linear bearing). The eccentricity Esi corresponds to the stroke of the seal stamp 80 , The position "seal stamp 80 above (ready to unload the object to be sealed) "is more or less at top dead center. The position "seal stamp 80 below (sealing of the object to be sealed) "is plus / minus 90 degrees.

The float's movement 90 happens via the coupling rod 88 (Articulated rod), which is also on the drive lever 86 is mounted eccentrically. The eccentricity Esi of the roller 84 is much smaller than the eccentricity Esc of the coupling rod 88 because at the same angle the coupling rod 88 makes more stroke than the seal stamp 80 (The diameter of the object to be sealed 98 is greater than its thickness). The slider 90 is in the same housing as the seal stamp 80 linearly mounted, but horizontally. At top dead center (seal stamp 80 above) is the slider 90 retracted, ie the slide 90 has an object to be sealed 98 under the seal stamp 80 brought. The geometry of the slider 90 closes a gutter, not shown, so that no object to be sealed 98 is jammed. About this channel are the objects to be sealed 98 fed. Is the seal stamp 80 in the lower position, so when sealing (about 90 degrees), is the slider 90 fully extended and the next object to be sealed 98 slips out of the gutter. Reloading the object to be sealed 98 and sealing the object 98 take place parallel to each other. Since the sealing process takes up most of the time in the high-performance area, the object to be sealed has this drive 98 most of the time to get in front of the slider 90 to get to without additional process time is needed. The arrangement of horizontally moving slides 90 and vertically moving seal stamp 80 in conjunction with the 90 degree movement allows the coupling of both movements. At the beginning of the upward movement of the stamp from the 90-degree position, the slider remains 90 almost stand, because he is relative to the drive lever 86 comes from the extended position. The object to be sealed 98 in front of the slider 90 thus does not hit the seal stamp 80 at. At the end of the upward movement is the seal stamp 80 in the extended position and hardly moves. Now the slider slides 90 with its largest lift / angle the object to be sealed 98 under the seal stamp 80 , In the object to be sealed 98 it may, for example, be a coffee valve that is sealed in a coffee packaging. Preferably, it is the attachment of an internal coffee valve. The seal can be made by any known method, for example, by thermal sealing, conventional or generated by ultrasound.

This drive device is particularly suitable for in the 1 - 3 described application module 10 for high performance, but is not limited thereto.

Claims (10)

Drive device for a sealing station, comprising at least one positioning device ( 90 . 108 ) for feeding into packaging material ( 96 ). Objects ( 98 ), with at least one sealing station ( 80 . 102 . 106 ) containing at least one object to be sealed ( 98 ) with the packaging material ( 96 ), wherein the sealing station ( 80 . 102 . 106 ) at least one seal stamp ( 80 ), a drive ( 114 ), characterized in that coupling means ( 86 . 88 ) are provided for the mechanical coupling of the positioning device ( 90 . 108 ) with the drive ( 114 ). Apparatus according to claim 1, characterized in that an eccentrically driven roller ( 84 ), which seals the seal ( 80 ) emotional. Device according to one of the preceding claims, characterized in that the roller ( 84 ) with one in the seal stamp ( 80 ) or seal stamp holder ( 106 ) groove ( 82 ) cooperates. Device according to one of the preceding claims, characterized in that as coupling means a coupling rod ( 88 ) is provided. Device according to one of the preceding claims, characterized in that the coupling means ( 86 . 88 ) eccentrically with the drive ( 114 ) are connected Device according to one of the preceding claims, characterized in that the roller ( 84 ) with the drive ( 114 ) via the drive lever ( 86 ) connected is. Device according to one of the preceding claims, characterized in that the drive lever ( 86 ) is eccentrically connected to the positioning device ( 90 . 108 ). Device according to one of the preceding claims, characterized in that the eccentricity (Esi) of the roller ( 82 ) is smaller than the eccentricity (Esc) of the coupling agent ( 86 . 88 ). Device according to one of the preceding claims, characterized in that the positioning device ( 90 . 108 ) and seal stamp ( 80 ) are linearly stored. Device according to one of the preceding claims, characterized in that it is in the drive ( 114 ) is a servomotor.

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