DE102009035132A1 - Material web processing device, has drive including set of eccentrics exhibiting phase shift with respect to another set of eccentrics, where phase shift between eccentrics amounts to specific degrees - Google Patents

Abstract

The device has upper- and lower tools (2, 3) arranged above and below a material web (100), respectively, and a drive (5) for moving the upper- and lower tools. The drive includes two sets of eccentrics (52a, 52b, 55a, 55b) for moving the upper- and lower tools, where the eccentrics are drivable by a continuously running tension drive (58). The set of eccentrics exhibits a phase shift with respect to another set of the eccentrics, where the phase shift between the eccentrics amounts to 170 degrees to 190 degrees.

Description

The Invention relates to a device for processing a material web, comprising an upper tool arranged above the material web and an arranged below the material web lower tool, the Editing the material web intermittently until it abuts one another be moved with the interposition of the web, wherein to move of upper and lower tool a drive is provided.

Such a device is for example from the DE 10 2006 006 601 A1 known.

The Material web, which is in particular a film web Plastic, laminates, paper and / or parchment sheets can act normally conveyed in a conveying direction and the upper tool and the lower tool extend transversely to this conveying direction. At each stroke, the drive becomes the upper tool and the lower tool is moved toward the web until they come to rest with the interposition of the material web and by means provided in the upper tool and / or lower tool Processing elements z. B. a welding, punching, Can cause perforation or cutting the web.

such Devices for processing a material web become, for example in film welding machines for the assembly of plastic film to bags, sacks or the like. More used.

From the already mentioned DE 10 2006 006 601 A1 It is known to arrange the upper tool and the lower tool on a common circulating between two pulleys traction drive, wherein the upper tool is attached to a strand and the lower tool on the other strand of the traction drive, so that a very energy-efficient and responsive and a plurality of degrees of freedom in the Control having drive is provided, in particular when the upper tool and the lower tool have substantially the same weight, as a load-neutral arrangement results due to the selected suspension on the rotating traction drive and cancel the weight forces each other. The per se proven principle, however, is subject to certain limitations in terms of the size of the upper and lower tools to be operated, so that it is only partially suitable for processing particularly wide material webs, for example for inliners for big bags or requires large space, which is considered to be in need of improvement ,

task The invention is therefore an apparatus of the aforementioned To propose way that avoids the disadvantages of the prior art.

to Solution of the problem is inventively the Embodiment of a device for processing a material web proposed according to the features of claim 1.

advantageous Embodiments and developments of the invention are the subject the dependent claims.

The Invention proposes as a drive for the intermittent movable upper and lower tools at least one the lower tool moving first eccentric and at least one of the upper tool to provide moving second eccentric, said eccentric means an endless rotating traction drive can be driven together and between the at least one first eccentric and the at least one a second eccentric is a phase shift.

Under an eccentric in the context of the invention is a on a shaft attached control disk understood, whose center outside the shaft axis lies, allowing a rotational movement in one translational movement can be converted. The generated translatory movement is on the upper tool connected to the respective eccentric or lower tool and causes the desired Movement of the same in the context of the working cycle.

With Advantageous are the eccentrics used in the invention coincident However, they will be dependent on theirs Assignment to upper or lower tool installed deviating from each other.

The According to the invention provided phase shift between the at least one first eccentric and the at least a second eccentric refers to the respective upper and lower Dead center of the eccentric, d. H. the point at which this reverses its translatory direction of movement.

There the at least one eccentric driving the upper tool and the at least one eccentric driving into the lower tool an endless rotating traction drive are connected and together are drivable, the selected phase shift is always maintained.

By a suitable choice of the size of the phase shift and tuning of the weights of the upper and lower tool, a particularly quiet and energy-saving operation can be ensured in the inventive device, esp especially if the phase shift is selected according to a proposal of the invention between 170 ° to 190 ° and ideally 180 °.

If the phase shift between the at least one the lower tool moving first eccentric and the at least one the upper tool moving second eccentric is 180 ° the at least one first eccentric always in its lower Dead center, if the at least one second eccentric in itself in his is at top dead center and vice versa, d. H. that with the least a first eccentric connected lower tool and that with the at least A second eccentric connected upper tool will be exactly opposite moved to each other when the first and second eccentric over the common traction mechanism drive are set in rotation.

It is understood that in this case at the at least one first Eccentric and the at least one second eccentric with respect to the traction mechanism drive same gear ratios must be present, d. H. the corresponding drive wheels, over the traction drive for driving the first and second eccentric is guided, have matching dimensions on.

If moreover, what is preferred in this respect, the upper tool and the lower tool are designed with substantially the same weight, stand in consequence of the connection over the common Traction drive and the ideal 180 ° phase shift between the at least one first eccentric and the at least a second eccentric the weight forces of upper and Lower tool on each other, so that a load-neutral suspension and actuation of upper tool and lower tool achieved is what a high number of cycles of the invention Device with low required drive power as well as high flexibility with regard to the achievable processing time z. B. ensures welding of the web.

There the at least one first eccentric and the at least one second Eccentric are driven together by means of a circulating traction drive together, it is also preferred, only a common Provide rotary actuator for the eccentric, for example attack directly on the endless rotating traction drive or Secondary drive the traction drive, what follows is explained in more detail.

To Another proposal of the invention are for moving upper tool and lower tool in each case a plurality of first and / or second eccentric provided, wherein the plurality of first eccentric or the plurality second eccentric with each other by a coupling drive with each other are connected so that they are always synchronous and preferably move without phase shift to each other. By arranging several on the upper tool and / or the lower tool for moving the same acting first and second eccentric can the upper tool or the lower tool have larger dimensions, because by means of the plurality of eccentric to each remote lying points a force introduction to the movement of the upper tool or lower tool can be done.

Even though it is considered advantageous within the scope of the invention if all eccentrics of the same assignment, d. H. all first eccentrics or move all the second eccentric synchronously to each other, it is too conceivable, these with each other with a small phase shift equip it, if it is for the respective processing case advantageous that the thus driven Upper tool or lower tool not exactly parallel to the material web is moved.

Of the Traction drive and the optionally available coupling drives can according to a proposal of the invention as positive Traction drives with an endless circulating toothed belt or a Chain be formed.

To a further proposal of the invention can on both sides, d. H. in Conveying direction of the material web considered in succession in each case a drive be provided to the possible dimensions of upper tool and lower tool and thus the available standing surface for the arrangement of processing elements for the material web to further enlarge. In such a case, it is provided that each first and second eccentric in the drives to arrange common waves, to achieve exact synchronization and the number of necessary Drive motors to a minimum.

According to a further proposal of the invention may be provided between the at least one first eccentric and the lower tool and / or between the at least one second eccentric and the upper tool each have a linear drive, for example, a pneumatic cylinder, which can perform one of the translational movements of the eccentric superimposed linear motion , which can be rectified or opposite, depending on the control both the respective direction of movement of the eccentric. The linear drive can, for example, for controlling the contact pressure of the upper tool and / or lower tool on the material web and for controlling the residence time of upper tool and lower tool be used on the web.

To For this purpose, a control device is preferably provided, by means of which the linear drive independent of the traction drive is controllable for the eccentric.

Further Embodiments and details of the invention are described below on the basis of an embodiment illustrative drawing explained in more detail.

It demonstrate:

1 The view of the device according to the invention viewed in the conveying direction of the material web;

2 The supervision of the device according to 1 ;

3 The side view of the device according to 1 ;

4 The drive of the device according to 1 in a simplified schematic diagram.

From the 1 to 3 is a device for processing a material web 100 , For example, a plastic film sheet, which by using reference numerals 2 and 3 marked upper and lower tools z. B. bags or can be made into sacks.

The device comprises, in particular from the 1 apparent two sub-devices 4a . 4b , which are mirror images of each other and constructed substantially identical and pliers the material web 100 spread. In this way, the processing of large widths of webs 100 possible, but can be explained below to explain the operation of the device according to the invention on the sub-device 4a be referenced, the corresponding statements apply to the sub-device 4b corresponding.

In the 1 is the position of the material web 100 indicated only by dash-dotted lines, while in the illustrations according to 2 and 3 the material web of clarity is not shown, only the direction of arrow F marked with the same through the device is shown.

The device 4a has a substantially C-shaped support frame with frame parts 400 . 401 on, the one upper horizontal thigh 40 , a lower horizontal leg 41 and a vertical connecting leg 42 comprise and viewed in the conveying direction F are arranged one behind the other.

Between the two horizontal thighs 40 . 41 is a workroom 43 present, through which the material web 100 in the conveying direction F is passed for processing.

The processing is effected by the upper tool 2 and the lower tool 3 , which are between the frame parts 400 . 401 and above or below the material web 100 arranged and in the manner explained in more detail below by means of a drive intermittently until it abuts each other with the interposition of the web 100 are movable.

The upper tool 2 and the lower tool 3 are in a manner not shown with processing elements for the web 100 , Such as welding bar, hold-down, cutting bar, punching bar, embossing bar or Perforierbalken provided, which are not shown for the sake of clarity. These are located in the area of the upper tool 2 on the material web 100 facing bottom and in the area of the lower tool 3 on the material web 100 facing top.

If the upper tool 2 and the lower tool 3 be moved towards each other in the context of a work cycle according to arrows P, T and with the interposition of the material web 100 come to rest against each other, there is a processing of the material web according to the intended processing elements, ie welding, clamping, cutting, punching, embossing or perforation. This depends on the respective configuration of the material web 100 product to be produced.

To the device 4a with processing elements corresponding to a desired configuration of the material web to be processed 100 and equip the product to be produced, have the upper tool 2 and the lower tool 3 each a replaceable tool carrier 20 . 30 on which via a feeder 6 like a drawer between the frame parts 400 . 401 through according to arrow H in the upper tool 2 or the lower tool 3 introduced or vice versa can also be removed.

The replaceable tool carrier 20 . 30 is of plate-like shape and has a rectangular outline and serves as a mounting support for the case of the upper tool 2 on the underside and in the case of the lower tool 3 Upper side to be attached processing elements.

As in particular from the 3 the tool holder is apparently resting 20 on itself across the conveyor direction F of the material web 100 extending and parallel to each other supporting profiles 21 and is by means of screws 210 with the support profiles 21 connected. In the same way, the attachment of the tool carrier takes place 30 in the lower tool 3 ,

The supporting profiles 21 are about screw connections 8th with linear drives 7 connected in the form of pneumatic cylinders and another part of the drive, the global with reference numerals 5 is provided and will be explained in more detail below. This structure is on both frame parts 400 . 401 consistently available.

About set screws in the screw connections 8th can be an exact parallelism of the support profiles 21 and thus the tool carrier thereon 20 to the material web 100 be adjusted.

The movement of the upper tool 2 and the lower tool 3 in the direction of arrows P, T intermittently until they abut each other with the interposition of the web 100 and against the arrows P, T away from each other by means of the drives 5 . 7 causes and on the one hand by controlling the linear actuators 7 superimposed by movement of the drive 5 ,

The drive 5 consists of a drive motor 50 , which has a revolving drive belt 51 an eccentric 52a set in rotation, which is due to the eccentricity in a position to cause a translational movement in the form of a stroke in the direction of arrow T. The eccentric 52a via a coupling drive 53 in the form of a toothed belt with a second eccentric 52b connected. Both eccentrics 52a . 52b are aligned exactly synchronous with each other and so far in a position, an exactly synchronous movement of the lower tool 3 in or opposite to the direction of arrow P to cause, if over the drive motor 5 and the drive belt 51 a rotational movement takes place.

The two previously explained eccentric 52a . 52b form first eccentric with the lower tool 3 while in the area of the upper tool 2 equally eccentric are provided as the second eccentric 55a . 55b be designated and on the additionally provided linear actuators 7 with the upper tool 2 are connected. Upon rotation of the eccentric 55a . 55b becomes a translatory movement in the direction of arrow P of the upper tool 2 generated.

Also the second eccentric 55a . 55b are about a coupling drive 56 connected in the form of a toothed belt and run synchronously with each other, wherein both the coupling drive 56 as well as the coupling drive 53 via a tension pulley 54 can be brought to the required tension.

While with the lower tool 3 connected and the same movement in the direction of arrow T or opposite thereto serving first eccentric 52a . 52b directly over the drive motor and the associated drive belt 51 are rotationally driven, the rotary drive of the two takes place via the coupling drive 56 coupled second eccentric 55a . 55b for moving the upper tool 2 in or opposite to the arrow P over an endless revolving traction mechanism 58 z. B. in the form of a toothed belt, which between the first eccentric 52b and the second eccentric 55b and is guided and over pulleys 59a . 59b . 59c . 59d endlessly circulating. Also with this traction mechanism 58 are tensioning devices 590 provided to the corresponding belt tension serving as tension rollers pulleys 59c . 59d to be able to adjust.

As already mentioned, the first eccentrics 52a . 52b and the second eccentric 55a . 55b aligned with each other so that they run according to their assignment exactly synchronous to each other, ie the dead centers of all the first eccentric 52a . 52b and the dead centers of all second eccentrics 55a . 55b are preferably run through simultaneously when the drive motor 50 over the drive belt 51 and subsequently on the sequence of traction drives 53 . 58 . 56 all eccentrics rotated.

However, there is between the first eccentrics 52a . 52b for driving the lower tool 3 and the second eccentrics 55a . 55b for driving or moving the upper tool 2 a phase shift of exactly 180 ° here, allowing the movement of upper tool 2 and lower tool 3 exactly opposite.

This principle is also apparent from the simplified illustration 4 can be seen, in which only a lower first eccentric 52 and an upper second eccentric 55 is shown and the point of greatest eccentricity each with 528 respectively. 558 is designated.

The phase shift between the first eccentric 52 and the second eccentric 55 of exactly 180 ° causes, at the time when the second eccentric 55 is located at the bottom dead center, to which the movements in the direction of arrow P reverses in the opposite direction, the first eccentric 52 is in its top dead center, in which the direction of movement according to arrow T is just reversed. Thus, the attached to the first and second eccentrics and moved by these upper and lower tools 2 moved in opposite directions, ie in the direction of arrow P, T at the beginning of the power stroke towards each other until they are on both sides of the web 100 to the plant kom men and opposite arrow directions P, T away from each other to the end of the power stroke to release the web and to allow a feed of the same. The alignment of upper and lower tool 2 . 3 is always parallel to the material web 100 ,

In addition, the connection of the lower tool causes 3 driving eccentric 52 respectively. 52a . 52b with the second eccentric 55 respectively. 55a . 55b for driving the upper tool 2 over an endless circulating traction drive 58 a load-neutral suspension and thus a balance of the weight forces of upper and lower tool 2 . 3 if they have the same or substantially the same total weights. Due to the phase shift between the first and second eccentrics 52 . 52a . 52b . 55 . 55a . 55b is ensured that the force to lift the one tool, such as the lower tool 3 in the direction of arrow T by the simultaneous downward movement of the counter-rotating upper tool 2 is compensated in the direction of arrow P and vice versa, and indeed at any time of the circulation of the traction mechanism 58 , The agreement in weight of upper and lower tool 2 . 3 If necessary, by attaching balancing weights on top or bottom tool 2 . 3 be brought about. It is also possible, the thickness of the tool carrier used in upper and lower tool for the purpose of weight adjustment perform differently.

In that regard, the device thus described requires only low power of the drive motor 50 and correspondingly low energy consumption, which is extremely advantageous. In addition, the basic shape of the approximately C-shaped frame allows the following course of the traction mechanism drive 58 a particularly space-saving design of the device.

It is understood that the above-explained phase shift by 180 ° between the first eccentrics 52 . 52a . 52b and the second eccentrics 55 . 55a . 55b represents the ideal case, which is also preferred so far, however, the described advantages of the invention with respect to smooth running, small footprint and low drive power can be achieved even at 180 ° approximated phase shifts with low losses, for example in a range between 170 ° and 190 °.

The in the drawings in the area of the upper tool 2 additionally provided linear actuators 7 which are located between the eccentrics 55a . 55b and the upper tool 2 are located, superimpose a movement in or opposite to the direction of arrow P of the translational movement of the eccentric 55a . 55b , Depending on the control of the linear drives 7 can the movement of the same in the same direction as the eccentric 55a . 55b or contrary to this.

If, for example, the eccentric 55a . 55b the upper tool 2 in the direction of arrow P to the surface of the web 100 have introduced, allows an in the same direction taking place control of the linear drives 7 a targeted control of the material web 100 exerted contact pressure, for example, the effect of an upper tool 2 located processing element may be required.

On the other hand, an actuation of the linear drives opposite to the arrow direction P can take place 7 in such a case also to shorten the residence time of the upper tool 2 on the surface of the material web 100 by premature lifting of the upper tool 2 serve from this surface or even a blank cycle can be generated, where the upper tool 2 not with the surface of the material web 100 comes into contact.

On the other hand, if the eccentric 55a . 55b generate a movement opposite to the direction of arrow P, a taking place in the direction of arrow P control of the linear drives 7 an extension of the contact time of the upper tool 2 on the material web 100 cause, for example, which can be used to extend the available welding time.

Here are the expert for a variety of applications, all options open, in particular provided to provide a controller with which the linear actuators 7 independent of the drive motor 50 for the drive 5 can be controlled.

About the speed of the drive motor 50 Thus, only the duration of a power stroke is set, but the processing time can be via the linear drives 7 be varied further. As a result, the device reaches maximum flexibility.

It is understood that such linear drives 7 also in the area of the lower tool 3 may be provided in an analogous manner.

The representation according to 2 and 3 it is also removable that to create the largest possible working surface for the top and bottom tool 2 in the conveying direction F of the web, two such drives are arranged one behind the other, namely both on the frame part 400 as well as on the frame part 401 so that the tool carrier 20 . 30 from upper tool 2 or lower tool 3 considered in plan view rectangular shape aufwei sen can. In each corner region, ie a total of four points is an introduction of the driving forces in the direction of arrow P, T to move the upper tool 2 and lower tool 3 ,

In order to ensure the necessary synchronous operation of both drives, the respectively correspondingly provided first and second eccentric 52a . 52b . 55a . 55b on common waves 550a . 550b respectively. 520 arranged so that the drive power and speed of a single drive motor 50 from the drive 5 on the frame part 400 equally on the drive 5 on the frame part 401 is transmitted.

In order to obtain maximum flexibility of the device shown in the drawings, the two sub-devices 4a . 4b be adjusted widthwise in the direction of arrow B, to adapt to the width of the web 100 make.

However, those skilled in the art will recognize that even a single subdevice 4a respectively. 4b at correspondingly smaller width of the web 100 considered by itself functional and insofar subject of the invention.

Of course, it is also possible, deviating from the representation in the 1 to 3 less or more than two via a coupling drive 56 coupled to each other first and second eccentric 52a . 52b . 55a . 55b provided.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• - DE 102006006601 A1 [0002, 0005]

Claims (10)

Device for processing a material web ( 100 ), comprising one above the material web ( 100 ) arranged upper tool ( 2 ) and below the material web ( 100 ) arranged lower tool ( 3 ), which are used for processing the material web ( 100 ) intermittently to the plant to each other with the interposition of the material web ( 100 ) are movable, wherein for moving upper and lower tool ( 2 . 3 ) a drive is provided, characterized in that the drive at least one of the lower tool ( 3 ) moving first eccentric ( 52 . 52a . 52b ) and at least one of the upper tool ( 2 ) moving second eccentric ( 55 . 55a . 55b ), wherein the eccentrics ( 52 . 52a . 52b . 55 . 55a . 55b ) by means of an endlessly circulating traction mechanism drive ( 58 ) are jointly drivable and the at least one first eccentric ( 52 . 52a . 52b ) relative to the at least one second eccentric ( 55 . 55a . 55b ) has a phase shift. Apparatus according to claim 1, characterized in that the phase shift between the first and second eccentric ( 52 . 52a . 52b ; 55 . 55a . 55b ) Is 170 ° to 190 °. Apparatus according to claim 1 or 2, characterized in that the phase shift between the first eccentric ( 52 . 52a . 52b ) and the second eccentric ( 55 . 55a . 55b ) Is 180 ° Device according to one of claims 1 to 3, characterized in that the upper tool ( 2 ) and the lower tool ( 3 ) have substantially identical weights. Device according to one of claims 1 to 4, characterized in that a common rotary drive ( 50 ) for the eccentric ( 52 . 52a . 52b . 55 . 55a . 55b ) is provided. Device according to one of claims 1 to 5, characterized in that a plurality of first eccentric ( 52 . 52a . 52b ) and / or a plurality of second eccentrics ( 55 . 55a . 55b ) are provided, each by means of a coupling drive ( 53 . 56 ) are connected. Device according to one of claims 1 to 6, characterized in that the traction drive ( 58 ) and / or the coupling drives ( 53 . 56 ) are designed as a positive traction mechanism drives with an endless circulating toothed belt or chain. Device according to one of claims 1 to 7, characterized in that on both sides of upper and lower tool ( 2 . 3 ) is provided in each case a drive and the respective first and second eccentric ( 52 . 52a . 52b . 55 . 55a . 55b ) on common waves ( 520 . 550 ) are arranged. Device according to one of claims 1 to 8, characterized in that between the at least one first eccentric ( 52 . 52a . 52b ) and the lower tool ( 3 ) and / or between the at least one second eccentric ( 55 . 55a . 55b ) and the upper tool ( 2 ) a linear drive ( 7 ) is provided. Apparatus according to claim 9, characterized in that the linear drive ( 7 ) independent of the traction drive ( 58 ) is controllable.

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