EP0657275B2 - Corrugating roller for the manufacture of corrugated paper - Google Patents

Description

The invention relates to a corrugated roller for the production of corrugated cardboard with the features specified in the preamble of claim 1.

Such a corrugating roller, such as e.g. is known from EP-A-0 025 759, is used in corrugated cardboard machines in particular for the production of single-sided corrugated cardboard used. As a central corrugating roller, it is usually positioned with a second corrugated roller in contact, whereby through the nip between the both corrugated rollers the so-called corrugated sheet of corrugated board passed and then using a glue applicator roller in contact stands with the corrugated roller, is glued. Then using a Pressure roller, which is also in contact with the corrugated roller, the so-called Cover sheet connected to the glued corrugated sheet to the one-sided To complete corrugated cardboard.

The central corrugated roller is intended to perform other functions, in particular support effective corrugation and clean glue application. For example, the corrugated roller should on the one hand be heatable in order to be heated the corrugation to simplify the corrugation. On the other hand, the Corrugated sheet on the corrugated surface of the corrugated roller in the looping area the corrugated web from the first nip between the central one Corrugated roller and the second corrugated roller up to the second nip held between the central corrugating roller and the pressure roller so that the corrugated sheet lies cleanly in the recesses of the corrugation. Only then can the corrugated web be properly glued to the elevations only the corrugation and perfect corrugation of the corrugated sheet is guaranteed.

To fulfill the above functions it is known from EP-A-0 025 759 known, a pneumatic fixing device in the form of a suction device for the section of the corrugated web that wraps around the corrugated roller to provide which suction device parallel to the axis of rotation of the Corrugated roller has running suction holes in the roller shell, which on the one hand via openings with the corrugated surface of the Roll shell and on the other hand connected to a vacuum source are. For heating the known corrugated roller, it is provided in the central cavity of the roller a heating medium - e.g. Steam under high Pressure - initiate.

The heating device designed in this way is from different aspects disadvantageous. So the entire roll shell, for reasons a high stiffness of the corrugated rollers is thick-walled, only from the inside be heated out until its outer surface reaches the desired temperature shows. This is very energy intensive. In addition, the usually existing roller flanges that hold the roller shell on both Close ends, fully pressurized with the high pressure of the steam, so that in the dimensioning of the flanges and their fasteners the additional pressure forces from the saturated steam are included have to. This leads to an oversizing which is not necessary in itself the corresponding corrugated roller components.

In connection with the above problem was in the EP 0 314 538 A1 has already proposed the roller jacket with production bores to provide for a heating medium so that the one required for heating Heat is introduced into the corrugated roller where it is needed is, namely near the surface of the roll shell.

As a suction device for the section that wraps around the corrugated roller the corrugated web, however, are bores running radially in the roll shell used, which measure the entire roll shell and in the hollow Open the interior of the roll shell. The latter is with a vacuum source connected.

This construction of the suction device is disadvantageous in that the Bores in the roll shell are relatively long and are very thin. In order to occurs on the suction path from the outer surface of the corrugated roller to the interior of the roller a high pressure drop. In addition, the hollow Interior of the roll shell is relatively large. To compensate for the mentioned pressure loss and because of the large volume of the suction space is a powerful suction pump and therefore larger, more complex necessary for the suction device. This adds to the complication added that about the suction holes in the roll shell, which in the section of the lateral surface not covered by the corrugated sheet to the outside mouth, "wrong" air is sucked in, which leads to a further reduction contributes to the suction effect.

Corrugated rollers, such as those of the basic construction known from EP-A-0 025 759 are also from EP-A-0 009 907, EP-A-0 034 906 and US-A-1 264 506 known. These corrugated rollers also have those discussed Disadvantages.

The invention has for its object a corrugated roller of the generic type Kind in such a way that while maintaining an effective pneumatic fixing device the heating is improved in such a way that the heating with improved efficiency and accordingly reduced Energy expenditure can be operated and the disadvantages discussed due to the additional pressure when the hollow roller interior is loaded occurring axial forces can be avoided.

This object is achieved by the specified in the characterizing part of claim 1 Features resolved. Through the next to the air discharge channels the pneumatic fixing device provided in the roll shell Delivery channels for the heating medium are both the heating and the for the loading of the corrugated web that wraps around the corrugated roller Parts of the pneumatic fixing device directly in the roller jacket integrated. On the one hand, this increases the efficiency of the heating improved because the heat near the surface of the corrugated roller from Heating medium is dispensed on the roller jacket. By eliminating the Pressurizing the hollow interior of the roll shell occurs axial forces on the roller flanges mentioned at the outset, so that the latter with their fasteners, trunnions and the like only be designed according to the static and dynamic loads must be exerted on the corrugated roller during operation. A surprising one Advantage of the integration of the conveyor channels in the roll shell is also that the heat conduction path between the delivery channels and the outer surface of the roll shell not only - as discussed - is much shorter than in the prior art, but that too the full cross-section of the roll shell radially outside the conveyor channels is available for heat conduction. This is how the heat is transported unhindered to the lateral surface, which is a fast and effective Heating the outer surface is useful. With the corrugated rollers according to the prior art with a heated interior of the roll shell is the heat transfer through the wall of the roll shell due to the this interrupting air discharge channels, however, hindered.

Claims 2 and 3 characterize advantageous embodiments of the mutual Assignment of the conveying and arranged in the roll shell Air discharge ducts. This ensures that the Corrugated roller wrapping section of the corrugated sheet on the one hand and one uniform heating of the surface of the roll shell on the other hand achieved.

By the pair or group summary given in claim 4 from delivery channels to one flow and one return line can feed and discharge the heating medium at one of the two roller ends respectively. This shortens the supply and discharge lines for the heating medium e.g. between a steam generator and the corrugated roller. About that In addition, a corresponding summary of the first and last Return lines in the same or different numbers the heating behavior be optimally adapted to practical conditions. More on this is the embodiment can be seen.

In addition, it should be noted that in addition to the pair or group Summary of conveyor channels also other course configurations, such as. several conveyor channels connected in a meandering manner are conceivable.

Claim 5 characterizes a structurally simple configuration of the flow connection between those that belong together in pairs or groups Flow and return lines.

The measures specified in claims 6 and 7 serve an improvement the entry and exit of the heating medium, in particular by the ring distributor groove provided on the feed side according to claim 7 an even supply of the heating medium in all supply lines with a corresponding equalization of the heating effect over the circumference the corrugated roller is achieved.

Claim 8 indicates a particularly simple manufacturing technology Design for the delivery channels.

Claims 9 to 13 relate to advantageous configurations of the pneumatic Fixing device in the form of a suction device, by means of which in particular, it is avoided that the not wrapped by the corrugated web Sections of the lateral surface "wrong" air is sucked in.

The measure specified in claim 14 avoids that the air inlet openings connected to the air discharge channels in the roll shell in the outer surface e.g. become clogged with contaminants.

In addition to the embodiment of the specified in claims 9 to 13 pneumatic fixing device as a suction system can also do that in the Claims 15 and 16 characterized printing system are used. Such printing systems are generally known from the prior art, however, so far cooperating with such printing systems Air inlet openings and air discharge channels in the roller jacket of the corrugated roller were not provided. The use of such air inlet openings and air discharge channels in the roll shell, as specified in claim 15 is, however, is advantageous in that it is on the corrugated web an effective pressure gradient is built up, which the reliable Fixing the web on the corrugating roller strongly supported.

Fig. 1

eine schematische Seitenansicht einer Wellpappemaschine zur Herstellung einseitiger Wellpappe mit einem Saugsystem zur Fixierung der Wellpappebahn auf der Riffelwalze,

Fig. 2

eine schematische Draufsicht auf eine erfindungsgemäße Riffelwalze in einer ersten Ausführungsform,

Fig. 3

einen Teilschnitt durch die Riffelwalze entlang der Schnittlinie III-III nach Fig. 2,

Fig. 4

einen Teilschnitt analog Fig. 3 durch eine Riffelwalze in einer zweiten Ausführungsform,

Fig. 5

einen Querschnitt durch die Riffelwalze entlang der Schnittlinie V-V nach Fig. 4,

Fig. 6

einen Querschnitt durch die Riffelwalze entlang der Schnittlinie VI-VI nach Fig. 3,

Fig. 7

einen Teilschnitt durch die Riffelwalze entlang der Schnittlinie VII-VII nach Fig. 2,

Fig. 8

einen Querschnitt durch die Riffelwalze entlang der Schnittlinie VIII-VIII nach Fig. 7,

Fig. 9

einen Querschnitt im wesentlichen analog Fig. 8 einer Riffelwalze mit einer von Fig. 8 abweichenden Konfiguration der Heizmedium- Vor-und -Rücklaufleitungen,

Fig. 10

eine Seitenansicht einer Riffelwalze mit einer alternativen Ausgestaltung der Mantelfläche,

Fig. 11

einen Teilquerschnitt durch den Walzenmantel entlang der Schnittlinie X-X nach Fig. 9, und

Fig. 12

eine schematische Seitenansicht einer Wellpappemaschine zur Herstellung einseitiger Wellepappe mit einem Drucksystem zur Fixierung der Wellpappebahn auf der Riffelwalze.

Further features, details and advantages of the invention can be gathered from the following description, in which exemplary embodiments of the subject matter of the invention are explained in more detail with reference to the accompanying drawings. Show it

Fig. 1

1 shows a schematic side view of a corrugated cardboard machine for producing single-sided corrugated cardboard with a suction system for fixing the corrugated cardboard web on the corrugated roller,

Fig. 2

1 shows a schematic top view of a corrugated roller according to the invention in a first embodiment,

Fig. 3

3 shows a partial section through the corrugating roller along the section line III-III according to FIG. 2,

Fig. 4

3 shows a partial section analogous to FIG. 3 through a corrugated roller in a second embodiment,

Fig. 5

3 shows a cross section through the corrugating roller along the section line VV according to FIG. 4,

Fig. 6

3 shows a cross section through the corrugating roller along the section line VI-VI according to FIG. 3,

Fig. 7

3 shows a partial section through the corrugating roller along the section line VII-VII according to FIG. 2,

Fig. 8

6 shows a cross section through the corrugating roller along the section line VIII-VIII according to FIG. 7,

Fig. 9

8 shows a cross section essentially analogous to FIG. 8 of a corrugated roller with a configuration of the heating medium supply and return lines that differs from FIG. 8,

Fig. 10

2 shows a side view of a corrugated roller with an alternative configuration of the lateral surface,

Fig. 11

a partial cross section through the roll shell along the section line XX of FIG. 9, and

Fig. 12

is a schematic side view of a corrugated cardboard machine for producing single-sided corrugated cardboard with a printing system for fixing the corrugated cardboard web on the corrugated roller.

The corrugated cardboard machine 1 shown schematically in Fig. 1 is used for production single-sided corrugated cardboard. It has a central corrugated roller 2, which is driven in rotation about its axis of rotation 3. On a wrap angle W of 180 °, a corrugated web 4 is guided around the corrugated roller 2. A counter-corrugating roller 5 is arranged below the corrugating roller 2, which are driven in the opposite direction to the corrugating roller 2 is and the corrugation combs with the corrugation of the corrugating roller 2. Thereby is the corrugated web 4, which before entering the corrugated roller 2 and counter corrugating roller 5 formed nip is smooth, in the The corrugation of the corrugation roller 2 is pressed in and thus corrugated.

A glue unit 6 is arranged on the side next to the corrugating roller 2 Application roller 7 and a so-called squeeze roller 8 and an open one Glue tub 9. Squeeze roller 8 and applicator roller 7 on the one hand and the application roller 7 and the corrugating roller 2 on the other hand are in mutual contact, creating a defined layer of glue on the above Areas of the corrugated sheet 4 is applied in a conventional manner.

A smooth pressure roller 10 is arranged above the corrugating roller 2, which in turn forms a nip with the corrugated roller 2. Through this becomes the corrugated sheet 4 and a cover sheet brought up from a supply roll 11 passed through, whereby these two tracks 4, 11 to the one-sided Corrugated web 12 are combined.

The central corrugated roller 2 has a heater, not shown in FIG. 1 and a suction device for the corrugated sheet 4 to the latter in the area of the wrap angle W to be reliably fixed on the corrugating roller. Heating and suction device will be closer in the following explained.

2, the corrugated roller 2 has a hollow cylindrical roller shell 13 on. The outer lateral surface 14 is parallel to the axis of rotation 3 extending corrugation 15 provided, only partially in Fig. 2 is shown. Furthermore, several are uniform in the lateral surface 14 Spaced annular grooves 16 are provided, each run in a plane perpendicular to the axis of rotation 3. The ring grooves 16 have a slightly greater depth than the corrugation 15 on (see Fig. 3, 4).

At both ends 17, 18 of the roll shell 13 are roll flanges 19, 20 arranged, which is screwed to the roll shell 13 in the usual manner are and close its interior. Both roller flanges 19, 20 each have a coaxial to the axis of rotation 3 to the outside protruding bearing pins 21, 22, by means of which the corrugated roller 2 in corresponding roller bearings 23 rotatable in the roller stands on both sides 24, 25 is mounted. One journal 21 sits in one Shaft journal 26 continues with a (not shown) drive motor is connected for the rotational movement of the corrugated roller 2.

As is clear from FIGS. 3, 5, 6 and 8, the corrugated roller 2 a suction device for the corrugated roller 2 in the area of the wrap angle W surrounding section of the corrugated sheet 4. This suction device comprises parallel to the axis of rotation 3 of the corrugating roller 2 Suction bores 27 running in the roll shell over the length of the roll 13, which can be subjected to negative pressure in a manner yet to be described are. The suction bores 27 are each radially outward running openings 28 with the bottom of the annular grooves 16 in connection.

To connect the suction bores 27 to a vacuum source are according to the invention provided various possibilities.

3, the suction bores 27 are each from the roll jacket 13 in the roll flange 19 at one end 17 of the Corrugated roller 2 carried out by in the roller flange 19 each with the Suction holes 27 axially aligned through holes 29 are introduced are. These through holes 29 open freely on the end face 30 of the Roll flange 19 from. The ring-shaped area in which the mouth openings 31 of the through holes 29 emerge - essentially the area that is related to the annular cross section of the roll shell 13 covers - is by a stationary, on the end face 30 of the roller flange 19 closely fitting ring cover 32 covered on his the rear side facing away from the rear side with an integrally formed Ring approach 33 is provided. This ring shoulder 33 is in a corresponding Ring groove 34 in the roller stand 24 parallel to the axis of rotation 3 slidably mounted. To act on the ring cover 32 in the direction to the front side 30 of the roller flange 19 there are several over the circumference of the ring cover 32 arranged helical compression springs 35 are provided inserted between the groove base 36 of the annular groove 34 and the annular shoulder 33 are. The ring cover 32 also has in its on the roller flange 19 resting contact surface 37 has a partially annular recess 38, which extends over the wrap angle W, as shown in 8 by the dash-dotted outline of the recess 38 is made clear. The recess 38 is with a connection hole 39 in the ring shoulder 33 in connection, which opens into the annular groove 34. The latter is in turn connected to a through a passage 40 Junction box 41 on the roller stand 24 in connection, on which one is not The suction line shown can be connected to a vacuum source V. in the the rest of the ring cover 32 is against rotation in the ring groove 34 secured by a pin 42 fastened in the ring shoulder 33, which is in a Slot 43 engages on the roller stand 24.

By the suction device described above, the suction holes 27 depending on the rotational position of the corrugating roller 2 with the Vacuum source connected that only the openings 28 in the corrugated Shell surface 14 are subjected to negative pressure, which in the Corrugated web 4 wrapped circumferential portion of the corrugated roller 2 located are. This means that the suction device does not draw "wrong" air.

The alternative shown in FIGS. 4 and 5 serves the same purpose Embodiment of the suction device. In turn, these are Suction bores 27 with openings 28 to the groove base of the ring grooves 16 available, the suction bores 27 each in the region of their ends at the roller flanges 19, 20 closed by fastening screws 44 are at the same time a firm connection between the roll shell 13 and the roller flanges 19, 20 serve. The suction bores 27 are each via a connecting line 45 with a vacuum control device 46 connected. Each connecting line 45 consists of one radial branch 47 which, starting from the respective suction bore 27 Roller shell 13 and one in the interior 48 of the roller shell 13 engaging retaining pin 49 of the roller flange 19 radially inwards enforced. Each radial branch 47 of the connecting lines 45 opens into an associated axial branch 50, which is formed by a blind hole is, the roller flange 19 starting from the inside 51 of Retaining pin 49 to the area of the outer end of the bearing pin 21 enforced. In the area of the inside 51, each axial branch 50 is through closed a screw cap 52. Each axial branch 50 is still in front its blind end 53 with a radially outward opening 54 provided which opens into the peripheral surface 55 of the journal 21. As is clear from Fig. 5, the axial branches 50 of the connecting lines 45 in the radial and peripheral direction over the bearing pin 21 distributed.

The vacuum control device 46, by means of which only the suction bores 27 and the corresponding openings 28 are subjected to negative pressure be in the area wrapped by the corrugated web 4 of the outer surface 14 have a pot-like housing 56, which attached to the outside of the roller stand 24 facing away from the corrugated roller 2 and the end of the bearing protruding in this area 21 tightly surrounds. The interior of the housing 56, in which the openings 54 of the connecting lines 45 open into a vacuum chamber 57 and an atmospheric pressure or pressure chamber 58 radially divided. The semi-ring-shaped vacuum chamber 57 stands over a connecting flange 59 with a vacuum source V - e.g. a vacuum pump - in connection. The peripheral extension of the overpressure space 58 covers with the peripheral arrangement and size of the looping area the corrugated web 4 around the corrugating roller 2.

The overpressure chamber 58 is opened by a partially annular insert 60 an annular gap 61 is narrowed, with the two in the peripheral direction facing ends 62 of the insert 60 each have a sealing body 63 pressure-tight radial division of the housing 56 in the vacuum 57 and Overpressure chamber 58 is attached. The annular gap 61 stands over a connecting channel 64 in the insert 60 with a connecting flange 65 in connection, that can flow freely into the atmosphere - then the ring gap 61 pressurized with atmospheric pressure - or with an excess pressure source H (e.g. a pump) - then the Annular gap 61 is pressurized. In the latter case, through the pressurization of the suction bores 27 lifting the Corrugated sheet 4 from the corrugated roller 2 in the area of the outlet of the corrugated cardboard sheet 12 after the nip between the corrugating roller 2 and the pressure roller 10 supports.

The heating device for the corrugated roller 2 is described in more detail below. which is particularly evident from FIGS. 3, 6, 7 and 8. Basically, the heating device works with a heating medium, e.g. Saturated steam at a pressure of 16 bar and a temperature of approx. 200 ° C, which steam brought in from a corresponding steam generator and is introduced into the corrugating roller 2. For this purpose, the corrugated roller 2 parallel to the axis of rotation 3 in the roller jacket 13 between the suction bores 27 extending production bores 66, which as an annular Face of the roll shell 13 to the opposite face through holes are formed. In the area of their outer ends these delivery bores 66 are closed by screw plugs 67. The Delivery bores 66 run between the suction bores 27 such that these two types of holes alternately follow each other in the circumferential direction U. Conveying 66 and suction bores 27 are equidistant Roller jacket 13 arranged. Two successive ones in the circumferential direction U. Delivery bores 66 are in pairs to a flow line 68 and a return line 69 summarized. So that the input and Feeding the steam into the production bores 66 from one side of the Corrugated roller 2 ago. In the embodiment shown, that of a (not shown) steam generator via a pipeline 70 Saturated steam through a bushing designated 71 as a whole 71 fed into a steam channel 72 in the bearing journal 22, which channel as a coaxial to the axis of rotation 3 arranged blind hole is trained. Before the blind end 73 of the steam channel 72, which in the Area of the holding pin 74 of the bearing pin 22 is six Flow channels 75 star-shaped radially outwards and open into one Ring distributor groove 76 on the peripheral surface 77 of the retaining pin 74. Axially aligned with the ring distributor groove 76 are starting from the inner surface 78 of the roll shell 13 through channels 79 are provided each lead into the flow lines 68 in the region of the ends thereof facing the roller flange 20 (Fig. 7, 8).

At the opposite end of the production bores 66 (Fig. 3, 6) are the correspondingly combined as a flow 68 or return line 69 in pairs Production bores 66 connected to each other. The connection takes place in each case via radially inwardly through the roll shell 13 Through channels 80 that are on the inner surface 78 of the roll shell 13 flow out. The mouth openings of the two through channels 80 one Flow 68 and a return line 69 are oblong in plan view Conveying recesses 81 on the peripheral surface 82 of the holding pin 49 of the roller flange 19 connected to each other. So that arrives the saturated steam fed into the respective supply line 68 into the associated return line 69 where it to the opposite end 18 of the Corrugated roller 2 is returned in the region of the roller flange 20. For The steam lines are the return lines 69 with return channels 83 connected by the roller shell 13 and the holding pin 74th of the roller flange 20 extend radially inwards and in a central Blind hole 84 open out. The latter extends from the blind end 73 of the steam channel 72. A return pipe is in the blind hole 84 85 used sealing, the central in the steam duct 72 via the bushing 71 to the outside and from there back to the steam generator. So there is a closed steam cycle for heating the Corrugated roller 2.

9, a modified embodiment of the heating device for the corrugated roller 2 are described in more detail. It is too note that the position of the main section in Fig. 9 is essentially the 8, but in the right circumferential area of FIG. 9 the corrugated roller 2 is shown with an intersection, as the Section line VI-VI corresponds to FIG. 3. In the embodiment 9, in turn, saturated steam is supplied via the central steam channel 72 fed to the via the six radially extending flow channels 75 Ring distributor groove 76 arrives. From there lead nine feed-side Through channels 79 each to one of the nine supply lines 68. As 8 are the flow channels 75, the Ring distributor groove 76 and the through channels 79 in the region of the holding pin 74 arranged.

At the opposite end of the corrugating roller 2, that is in the region of the holding pin 49, each has a group of three flow lines 68 and an associated return line 69 through channels 80, which are common into a conveyor recess 81 'on the peripheral surface 82 of the Holding pin 49 open. In contrast to the exemplary embodiment according to FIG. 8 are therefore three feed lines 68 with one return line 69 in groups with the help of the three recesses 81 ' connected, each over a circumferential angle of approximately 100 ° in Extend circumferential direction over the peripheral surface 82 of the holding pin 49. The three support recesses 81 'are therefore only relative short separators 89 (shown in dashed lines in the main section of FIG. 9) Cut.

In the area of the holding pin 74 are the three return lines 69 each assigned return channels 83, which in the main section of FIG. 9 are also indicated by dashed lines and in the axial direction behind the Lead channels 75 are. These open out analogously to the exemplary embodiment 8 again in the return pipe 85 in the steam channel 72.

In addition to the two possible embodiments shown in FIGS. 8 and 9 other configurations for the heater are also for the pass of the heating medium conceivable. So only two instead of three supply lines be coupled with a return line.

It is also conceivable to submerge the steam directly through flow channels 75 Omission of the ring distributor groove 76 to transport in flow lines, on opposite end of the corrugating roller through one of the conveyor recesses 81 deflect the corresponding groove according to FIG. 8 into a return line, through a corresponding conveyor recess in the area of the holding pin 74 make a further diversion into a flow line, etc. This will result in a meandering course of the heating medium reached by the corrugated roller.

With the help of the various possible combinations for the steam flow are the flow rates in the flow and Return lines and thus the heat transfer from the corrugated roller adaptable to the corrugated sheet to the respective application. This can e.g. be desired to match the steam circulation in accordance with the In practice, different sized corrugated profiles must be designed. This leads to better utilization of the heat transfer medium and to cheaper, i.e. more uniform temperature distribution on the outer surface the corrugated roller.

10 and 11 show an alternative embodiment for the connection of the suction bores 27 for corrugation 15. Instead of the annular grooves 16 Groove segments 86 are provided in the lateral surface 14, each transverse to Corrugation 15 extend over a partial circumferential length of the roll shell 13. The groove base 87 of the groove segments 86 is curved outward as a concave Partial arc formed, each of which has a suction bore 27 cuts. So that suction openings 88 are formed to a suction connection to create between the suction bores 27 and the groove segments 86. The openings 28 to be drilled specifically can thus be dispensed with become. In addition, this arrangement results in a large one Opening area, thereby clogging the connection between the Suction bores 27 and the groove segments 86 is avoided.

Referring to Fig. 12, a corrugated board machine will be described below explained in more detail with a printing system. This corrugated cardboard machine is basically constructed like that shown in Fig. 1 and again has a central corrugating roller 2, a counter corrugating roller 5 and a smooth pressure roller 10 and a glue unit 6 with applicator roller 7 and squeeze roller 8 on. The glue pan 9 'is different from the embodiment 1 designed as a pressure box open on one side, which over a connecting piece 90 is connected to a positive pressure source. The Open side 91 closes essentially pressure-tight with that of the corrugated cardboard web 12 wrapped area (wrap angle W) of the lateral surface 14 of the corrugated roller 2. This is the lower, horizontal edge 92 of the open side 91 with a sealing strip 95, which with a Gap s against the lower corrugating roller 5, the glue pan 9 'on its underside completes. On the upper horizontal edge 93 of the open side 91 a sealing roller 94 is arranged across the width of the corrugated cardboard web rolls including the cover sheet 11 on the jacket of the pressure roller 10. The vertical edges of the open side, not shown in FIG. 12 91 close closely with the end faces of the corrugating roller 2, 5 and the pressure roller 10 from.

The corrugating roller 2 itself is e.g. as explained with reference to FIGS. 3 to 9 Corrugated roller designed, connecting to a vacuum source can be dispensed with. The suction holes 27 then serve as air discharge ducts connected to the atmosphere, by means of which the air ducts under the Overpressure pressed through the corrugated cardboard web and over the openings 28 or 88 air entering these air discharge ducts are carried away becomes.

The heating device of the corrugating roller 2 can be shown in FIG Embodiment are adopted unchanged.

Claims (16)

1. A fluted roll for the manufacture of corrugated boards comprising

   a hollow-cylindrical roll shell (13), of which the outer shell surface (10) is provided with a fluting (15) extending parallel to the axis of rotation (3) of the roll (2),

   roll flanges (19, 20) closing the roll shell (13) on both ends (17, 18), which roll flanges (19, 20) each comprise a bearing pin (21, 22) for rotatably supporting the fluted roll (2) in a roll standard (24, 25),

   a pneumatic fixing device for the portion, contacting the fluted roll (2), of a corrugated web (4) of the corrugated board web (12) to be manufactured, which fixing device comprises air exhaust channels (27), extending parallel to the axis of rotation (3) of the fluted roll (2), in the roll shell (13), which channels are on the one hand connected via openings (28, 88) with the fluted shell surface (14) of the roll shell (13) and on the other hand with a pressure reservoir, which has a lower pressure in relation to the pressure prevailing on the outer side of the contacting portion of the corrugated board web (12), and

   a heating installation for the fluted roll (2),

   characterized in that in addition to the air exhaust channels (27) of the fixing device also the heating installation is integrated in the roll shell (13) by heating agent transport channels (66) arranged in the roll shell (13).
2. A fluted roll according to claim 1, characterized in that the transport channels (66) extend between the air exhaust channels (27) of the fixing device in such a manner that the transport channels (66) and the air exhaust channels (27) alternately succeed one another in the circumferential direction (U) of the fluted roll (2).
3. A fluted roll according to claim 1 or 2, characterized in that the transport channels (66) and the air exhaust channels (27) are arranged in the circumferential direction (U) equidistantly in the roll shell (13).
4. A fluted roll according to one of claims 1 to 3, characterized in that the transport channels (66) are each combined in pairs to form a flow line (68) and a return line (69) or in groups to form flow lines (68) and return lines (69) of varying or equal numbers.
5. A fluted roll according to claim 4, characterized in that flow lines (68) and return lines (69) fitting in pairs or groups are provided in the vicinity of a roll end (17) with through channels (80), which extend radially to the inner surface (78) of the roll shell (13) and which each open in pairs or in groups into associated connecting channels in the form of transport recesses (81, 81') on the peripheral surface (82) of a retaining pin (49), engaging with the roll shell (13), of the roll flange (19).
6. A fluted roll according to claim 4 or 5, characterized in that the feed of the heating agent of the heating installation into the flow lines (68) and out of the return lines (69) takes place in common in the vicinity of an end (18) of the fluted roll (2) via feeding lines and feeding-out lines (72, 85) located coaxially one in another and via flow and return channels (75, 83), starting radially from these lines, in the roll flange (20).
7. A fluted roll according to claim 6, characterized in that the flow channels (75) in the roll flange (20) open into a circumferential annular distribution groove (76) for the heating agent in the peripheral surface (77) of the retaming pin (74) of the roll flange (20), from which annular distribution groove (76) radial through channels (79) lead to the flow lines (68).
8. A fluted roll according to one of claims 1 to 7, characterized in that the transport channels (66) are formed as bores passing through the entire roll shell (13) parallel to the axis of rotation (3) of the fluted roll (2), the open ends of which bores are closed by plugs (67).
9. A fluted roll according to one of claims 1 to 8, characterized in that the air exhaust channels (27), in dependence on the position of rotation of the fluted roll (2), are connectable with a vacuum source for a pressure reservoir in such a manner that only those air exhaust channels (27) are evacuated, of which the openings (28, 88) are located in the circumferential portion, contacting the corrugated web (4), of the fluted roll (2).
10. A fluted roll according to claim 9, characterized in that each air exhaust channel (27), via one connecting line (45) in each case in the roll flange (19) and in the associated bearing pin (21), is connected with a vacuum control device (46), the connecting lines (45) each being provided with openings (54) radially discharging into the peripheral surface (55) of the bearing pin (21), and the vacuum control device (46) comprising a housing (56) which lightly surrounds the bearing pin (21) and which, corresponding to the angle of contact (W) of the corrugated web (4) about the fluted roll (2), is divided into a vacuum chamber (57) connected with the vacuum source and an atmospheric pressure or high-pressure chamber (58), respectively, connected with the atmosphere or a high-pressure source, respectively.
11. A fluted roll according to claim 10, characterized in that the atmospheric pressure or high-pressure chamber (58), respectively, is limited by a partially annular insert (60) to form an annular gap (61), wherein on the insert (60), sealings (63) for the pressure-sealed separating of the housing (56) are arranged between its vacuum chamber (57) and its atmospheric pressure or high-pressure chamber (58), respectively.
12. A fluted roll according to claim 9, characterized in that the air exhaust channels (27) pass from the roll shell (13) into one (19) of the roll flanges (19, 20) and freely discharge (31) on the front face (30) of the roll flange (19), the annular area of the discharge openings (31) being covered by a stationary annular cap (32) closely fitting on the roll flange (19), which annular cap (32), on its stop surface (37) that rests on the roll flange (19), comprises a recess (38) extending in the circumferential direction (U) along the angle of contact (W) of the corrugated web (4) about the fluted roll (2), which recess (38) is connected with the vacuum source for evacuating those air exhaust channels (27), which are allocated to the roll portion (W) contacting the corrugated web (4).
13. A fluted roll according to claim 12, characterized in that the annular cap (32) is supported on the roll standard (24) for displacement in the rotational axial direction and is spring-loaded (35) in the contact direction to the roll flange (19).
14. A fluted roll according to one of claims 1 to 13, characterized in that the shell surface (14) of the roll shell (13) is provided with groove segments (86), which extend transversely to the fluting (15) over a partial circumferential length of the roll shell (13) and the groove bottom (87) of which intersects in each case at least one air exhaust channel (27) while forming air inlet openings (88).
15. A fluted roll according to one of claims 1 to 8 or 14, characterized in that a pneumatic high-pressure system is allocated to the fluted roll (2) in the vicinity of its shell surface (10) contacting the corrugated board web (12), which high-pressure system fixes the corrugated board web (12) from outside on the fluted shell surface (14) of the fluted roll (2) by means of high pressure, the air exhaust channels in the roll shell (13) being connected with the atmosphere for exhausting the air pressed through the corrugated board web (12) under the high pressure and entering the air exhaust channels via the openings (28, 88) in the roll shell (13).
16. A fluted roll according to claim 15, characterized in that the high-pressure system comprises a pressure box (9') open on one side, the open side (91) of which substantially closes pressure-sealed with such area of the shell surface (14) of the fluted roll (2) that contacts the corrugated board web (12).

Images