WO2009141114A1 - Crossbar of a machine frame for mounting a rotatable cutting roll used for cutting flat pieces or webs of material - Google Patents

Abstract

Described is a crossbar of a machine frame for mounting a rotatable cutting roll used for cutting flat pieces or webs of material. Said crossbar comprises connecting means for fastening at least one bearing device used for mounting the cutting roll, or at least one bearing device for mounting the cutting roll is monolithically arranged on the crossbar. The aim of the invention is to develop such a crossbar of a machine frame in such a way that there is as little leakage air as possible when the vacuum system of the cutting roll is on, the suction duct is easier to access, and more structural space is available in the zone of the cutting roll. Said aim is achieved by providing the crossbar with a suction duct for sucking off clippings produced when the cutting roll cuts the flat pieces or webs of material, said suction duct penetrating the crossbar.

Description

 Machine crosshead for supporting a rotatable cutting roller for cutting flat pieces of material or material webs

I. Field of application

The present invention relates to a machine crosshead for supporting a rotatable, preferably rotationally drivable cutting roller for cutting flat pieces of material or material webs. The flat pieces of material may, for example, be flat cardboard sheets made of cardboard from which folding carton blanks are cut out for the production of folding cartons, flat paper blanks from which, for example, envelopes or mailers are produced, or the like. The material webs may, for example, be paper webs which are processed into envelopes or mailing bags. The traverse according to the invention is used in machine frames of corresponding production machines application.

II. Technical background

From DE 198 41 834 A1 a Fensterausschneidstation a Envelope. Envelope making machine known. Fig. 5 of the present application shows the Fig. 1 from DE 198 41 834 A1.

Fig. 5 shows a counterclockwise rotatably drivable cutting roller 2 ', which cooperates with a counter cutting strip 3 ¹ . The cutting roller 2 'cuts in the envelope cuttings 4 'opened from the right, window openings for address windows in the envelopes. Subsequently, the letter blank is transported together with the cut window material piece over a certain angular distance on the circumference of the cutting roller 2 "until the letter blank is taken over by the further transporting suction roll 12 'without the piece of window material., On the other hand, the piece of window material remains on the circumference of the cutting roller 2' and is replaced a further angular distance corresponding to the piece of window material 8 'shown in Fig. 5 into a suction channel 13' which sucks the piece of window material 8 'and leads it to a waste disposal.

The suction channel 13 'is arranged in Fig. 5 approximately in the 4 o'clock position. In the real envelope production machine in which the window cutting station of FIG. 5 is installed is at about the 6 o'clock position, i. H. essentially vertically below the cutting roller 2 ', a machine traverse running in the direction of view of FIG. 5, but not shown in FIG. 5 itself for supporting the cutting roller 2'. The known Maschinengestelltraverse is chamfered according to the contour of the suction 13 '.

In the known Fensterausschneidstation shown in FIG. 5, designed as a suction roll cutting roller 2 'must transport the cut window piece of material 8' over a relatively large angular distance until it is discharged into the suction channel 13 '. This has the disadvantage that in the cutting roller 2 'across a correspondingly long suction distance across a vacuum must be maintained. The longer the suction lines in the vacuum systems in question, the more leakage or incorrect air occurs, which leads to an undesirable increase in the energy requirement of the vacuum system.

A further disadvantage of the known window cutting station according to FIG. 5 is that the suction channel 13 ', on the one hand, is relatively difficult to access, for example in the case of a blockage and, on the other hand, requires a relatively large amount of installation space that can not be available for other components of the window cutting station. III. Presentation of the invention

a) Technical task

It is therefore an object of the present invention to provide the ability to make cutting stations of the type in question such that the operation of the vacuum system of the cutting roller as little air leakage accumulates, the accessibility of the suction is improved and in the cutting roller more space for Available.

b) Solution of the task

This object is achieved by means of a machine traverse with the features of claim 1. Further embodiments of the present invention will become apparent from the dependent claims.

According to the invention, a machine crosshead for supporting a rotatable, preferably rotationally drivable cutting roller for cutting flat pieces of material or webs is proposed, the traverse body is traversed by a suction channel for sucking cutting waste, which arise when cutting the flat material pieces or webs by means of the cutting roller. In this case, the machine crosshead either attachment means for attaching at least one bearing means for supporting the cutting roller or the at least one bearing means for supporting the cutting roller is integrally arranged on the machine crossbeam or connected to it. The suction channel is therefore integrated directly into the anyway always existing machine crossbeam for supporting the cutting roller.

The use of the machine crosshead according to the invention in a cutting station has the advantage that the suction channel is always approximately in the 6 o'clock position of the cutting roller. This shortens the suction path of the pieces of waste material to be disposed, resulting in less air leakage and a lower ren energy demand of the vacuum system leads. In addition, the waste material pieces to be disposed of fall substantially vertically downwards, so that a not so strong suction of the suction fan as in the prior art is required. Furthermore, the space taken up by the machine traverse truss anyway vertically below the cutting roller is used simultaneously for the arrangement of the suction, so that a separate space for the arrangement of the suction is no longer required or can be used for other components of the cutting station. In addition, the suction tube brought about by the suction fan can be mounted and dismounted in a simple manner on the suction channel integrated in the machine traverse according to the invention. As a result, the suction channel integrated in the traverse is generally more accessible than the suction channels known in the prior art.

By means of the machine crosshead according to the invention, both a cutting roller provided with cutting edges and a rotatable counter cutting roller can be mounted, which has no cutting edges and cooperates with a cutting roller provided with the cutting edge. All that is essential is that the cutting roll or counterblade roll to be stored can transport the piece of waste material to be disposed of from the point at which the cutting process takes place into the region of the traverse and then discharge or suck it into the suction channel. The term "cutting roller" according to the present invention is therefore to be understood as a cutting roller with cutting edges or as a counter-cutting roller without cutting edges in the sense described above.

Preferably, the cutting waste leading surfaces of the suction channel are coated with an anti-adhesive, which may be, for example, Teflon. Alternatively, it is conceivable to form the surfaces of the suction channel leading the cutting waste with a sharkskin-like surface structure, for example by coating by means of a corresponding structural lacquer. Both measures advantageously ensure that the cutting waste when touching the surfaces of the suction channel with only minimal By friction forces can slide along these surfaces by frictional forces. The energy requirement of the vacuum system is further reduced by this measure.

The suction channel is preferably at least partially designed as a suction funnel, which tapers in the direction away from the cutting roller or with increasing distance from the cutting roller. In this context, it is possible to design the entire suction channel extending through the machine crosshead in such a funnel-shaped manner that the cutting roller facing inlet opening of the suction channel in the traverse the largest flow cross section and the cutting roller facing away from the outlet opening of the suction channel has the smallest flow cross-section. It is also conceivable, however, that the suction channel extending in the traverse is only partially designed as a suction funnel. In this alternative, the suction channel, for example, starting initially in the plane of its inlet opening into the traverse initially funnel-shaped and then pass within the Traverse in a suction with a constant flow cross-section. It is also conceivable to form the suction channel beginning in the plane of its inlet opening into the traverse as a suction channel with a constant flow cross-section and to let him pass over a certain distance from this level within the traverse in a suction funnel whose smallest flow cross-section in the plane of the outlet opening of the suction channel from the Traverse lies.

c) embodiments

Hereinafter, two embodiments of the present invention will be described by way of example with reference to the drawings. Show it:

1 shows a perspective view of a first embodiment of the machine crosshead according to the invention; FIG. 2 shows a sectional view according to section AA in FIG. 1; FIG.

3 shows a perspective view of a second embodiment of the machine crosshead according to the invention;

4 shows the machine crosshead shown in FIG. 3 with mounted bearing devices for supporting a cutting roller and a counter-cutting roller; and

Fig. 5: a known from the prior art Fensterausschneidstation a Envelope or envelope production machine according to FIG. 1 of DE 198 41 834 A1.

Fig. 1 shows a machine crosshead 1 according to a first embodiment of the present invention. The traverse 1 shown is used in a rotary cutting station of an envelope making machine. It consists of an elongated truss body 5 and two storage facilities 3 for supporting a rotating drivable cutting roller, which is not shown in Fig. 1.

As can be seen in Fig. 1, it is in the Traverse 1 to a post-processed casting, in which the two storage facilities 3 are integrally molded to the elongated truss body 5. The truss body 5 has a suction channel 4 penetrating it from top to bottom in FIG. 1, which in the embodiment shown is designed as a suction funnel whose flow cross-section is shown in FIG. 1 from top to bottom, i. in the suction direction of the cutting waste, preferably continuously reduced. The suction channel 4 is located substantially in the middle between the two storage facilities. 3

In FIG. 2 showing the section AA according to FIG. 1, it can be better seen how the suction channel 4 tapers in a funnel shape. Its flow cross-section preferably increases continuously starting from the upper side of the truss body 5, ie starting from the inlet opening 6 of the suction channel 4 into the traverse body. senkörper 5, up to the bottom of the truss body 5, ie up to the outlet opening 7 of the suction channel 4 from the truss body 5, from. As can also be seen in FIG. 2, the funnel shape of the suction channel 4 does not necessarily have to run symmetrically with respect to the vertical longitudinal center plane of the truss body 5. Incidentally, the funnel shape can be formed according to the requirements of the case, for example, a straight or oblique pyramid or truncated cone. It is also conceivable that the funnel shape is formed only by two opposite and mutually facing walls of the suction channel.

Preferably, all surfaces 8, 9 of the funnel-shaped suction channel 4 may be coated with an anti-sticking agent, such as Teflon. Alternatively, preferably all surfaces 8, 9 of the suction channel 4 may be provided with a sharkskin-like structure which, like an antiblocking agent, minimizes the static friction and sliding friction between the cutting scrapings and the surfaces 8, 9.

At the outlet opening 7 of the funnel-shaped suction channel 4, a suction pipe, not shown, can be connected, through which air is sucked by means of a suction fan. The resulting in Fig. 2 above the inlet opening 6 due to the cutting process performed by the cutting roller cutting waste are sucked by the suction air through the inlet opening 6 into the funnel-shaped suction channel 4 and then into the suction tube located below the outlet opening 7 and finally fed to disposal.

3 shows a second embodiment of the machine crosshead according to the invention. Like reference numerals denote like parts as in the first embodiment. Traverse 1 according to FIG. 3 is used in rotary cutting stations of folding box punching machines.

Also in the Traverse 1 shown in Fig. 3 is a post-processed casting. In contrast to the first embodiment, the second embodiment shown has no integrally molded on the truss body 5 bearing means for supporting the rotating drivable cutting roller. Instead, the elongated truss body 5 is provided at its two opposite end faces with connecting means for releasably securing a respective bearing means. In the embodiment shown, these connection means each comprise a connection projection 2 in the form of a U or a horseshoe, the open side of which lies below. The respective connection means furthermore comprise the connection surfaces 10 and 11 shown in FIG. 3.

As can also be seen in Fig. 3, also the second embodiment has a funnel-shaped suction channel 4 for sucking the cutting waste. Here again, the funnel shape of the suction channel 4, starting at the upper side of the truss body 5, extends to the underside of the truss body 5, which is not visible in FIG. 3. Merely for weight-saving reasons, a front side of the truss body 5 can be seen in FIG 12 is provided, which is not in a flow connection with the suction channel 4. The connection of the suction pipe for sucking the cutting waste takes place as in the first embodiment on the underside of the truss body fifth

Fig. 4 shows the machine crosshead 1 shown in Fig. 3 with attached storage facilities 3 and 33 for rotatably supporting a cutting roller, not shown, or a counter-cutting roller, not shown. As can be seen, two vertical struts 13 were screwed to each end face of the elongated truss body 5, which bear against the connection surfaces 10, 11 shown in FIG. 3 and on the vertical limbs of the U-shaped connection projection 2. On the horizontal web of the U-shaped connecting projection 2 each designed as a bearing block storage device 3 is arranged for rotationally drivable mounting a cutting roller. Above the storage device 3 is in each case designed as a bearing block bearing device 33 for supporting a rotatable counter-cutting roller.

The course of the funnel shape of the suction channel 4 within the truss body 5 in the second embodiment corresponds to that of the first embodiment. The alternative designs of the funnel shape in the form of a straight or oblique pyramid or truncated cone and a funnel shape, the is formed only by two opposite and running towards each other walls of the suction, are conceivable in the second embodiment.

LIST OF REFERENCE NUMBERS

1 crossbeam

2 connection projection

3 storage facility

4 suction channel

5 truss bodies

6 entrance opening

7 outlet opening

8.9 surfaces of the suction channel 4

10.11 connection surfaces

12 recess

33 storage facility

Claims

1. Machine crosshead for supporting a rotatable cutting roller for cutting flat pieces of material or material webs, wherein the traverse (1) Connecting means (2) for attaching at least one bearing device (3) for supporting the cutting roller or at least one bearing device (3) for supporting the cutting roller is integrally arranged on the crossmember (1), characterized in that the crossbeam (1 ) is penetrated by a suction channel (4) for the suction of cutting waste, which arise during the cutting of the flat material pieces or material webs by means of the cutting roller. 2. Machine traverse according to claim 1, dad u r e ke c in n e c i n e, t a s s the cutting waste leading surfaces (8, 9) of the suction channel (4) are coated with an anti-adhesive agent. 3. Machine Traverse according to claim 2, dad u rch geken n tend net that the non-stick agent is Teflon. 4. Machine traverse according to claim 1, characterized in that the cutting surfaces leading the cutting surfaces (8, 9) of the suction channel (4) have a sharkskin-like structure. 5. Machine traverse according to one of the preceding claims, characterized in that the suction channel (4) is at least partially designed as a suction funnel, wherein the suction funnel tapers in the direction away from the cutting roller.