WO2010127858A1

WO2010127858A1 - Production line

Info

Publication number: WO2010127858A1
Application number: PCT/EP2010/002788
Authority: WO
Inventors: Kurt Schramm
Original assignee: Kurt Schramm
Priority date: 2009-05-08
Filing date: 2010-05-06
Publication date: 2010-11-11
Also published as: DE102009020532B3; CH703270B1; DE212010000054U1; AT12536U1

Abstract

A production line (10) comprises: a. a wet end (11) comprising several, in particular dry, suction forming vats (12 - 19) or molder discharges or endless wires; b. at least one, preferably two, sizing presses (30); c. a hot-air drying system (31); d. a storage section (45), wherein the hot-air drying system (31) is designed as a suspension hot-air drying system.

Description

Herstellunαsstraße

Description

The invention relates to a production line, comprising:

a) a wet end with a plurality of, in particular, non-porous suction sieves or shaper discharges or long sieves;

b) at least one, preferably two sizing presses;

c) a hot air dryer plant;

d) a memory line.

There are three industrial processes for dewatering paper, board, cardboard and pulp, namely the wire, the screen and a combination of the two. In the case of a wire screen, a pulp suspension is applied through a hydrostatic or pressurized material casserole to a rotating sieve and dewatered.

In the case of a round screen, a pulp suspension is pumped into a hopper where it is scooped up by a rotating drum and fed to a rotating drum. of the top cloth, z. As wool felt, transferred and transported on hanging to the next round screen.

The term "shaper deduction" is used to express that all so-called "shaper" today are derived from long-screen or round-screen designs.

The object of the present invention is to provide a production line which is suitable both for cardboard and corrugated base papers, but which can also be used in pulp dewatering machines and for papermaking and whose space requirement is kept low. The production line should also be able to operate without failures, but at the same time at high speed.

This object is achieved by a production line of the type mentioned, wherein the hot air dryer system is designed as a hot air dryer plant. Preferably, the three-pass hot-air dryer system is "forward-backward" for temperatures up to about 350 ^° C. The hot-air dryer system may be fired by liquefied petroleum gas or natural gas, with liquified gas firing being preferred because it is more favorable Their use in the paper industry has only been practiced to some extent in the past after coating in separate coating machines, whereas surface contact drying by means of heated cast iron drying cylinders has hitherto been used. Conventional surface contact drying arrangements often have up to 130 cast-iron drying cylinders in the case of board machines Diameters up to 1.5 m, which means a considerable expense for such a drying plant can be made significantly cheaper. The inventively provided hot air dryer plant further has the advantage that much space and space is saved in the longitudinal direction of the production line, with corresponding savings in foundation, building and basement costs. Even a boiler house for steam production can be saved. Furthermore, the primary investment costs are far lower than steam-heated dryer cylinders, which in the past accounted for as much as 80% of the total board machine. In contrast, a hot-air dehumidifier plant accounts for only about 25% of the primary investment costs.

Also in terms of weight savings can be made. A hot air dryer plant accounts for about 30% of the total weight of the entire plant. In terms of drive technology (apart from the drives of the recirculation fans), only about 5% instead of the previous 80% of an entire system must be driven. Thus, the energy consumption can be significantly reduced. The design with several levels has the advantage that the space requirement is significantly lower. Thus, foundation costs can be saved.

The provision of a hot air dryer plant further has the advantage that z. B. deflecting rollers from floor to floor can be easily converted to fixed points. Edge control devices can be accommodated between the individual floating dryer housings. Floor deflection rollers can be surrounded with Plexiglas housings and included in the heating system. It can be done a residual drying with cold air. The Heißluftschwebetrockneranlage can have several superimposed drying and / or cooling layers. The cold air can thus be used to cool the paper web.

It may be a Schweffrocknereinheit (with a housing) may be provided and above one or more floors (floating) cooling units or floating radiators may be provided on one or more floors. However, it is also possible to provide a plurality of suspended-bed dryer units (each with housing) in the longitudinal direction of the production line and alternatively or additionally in several levels. In the cooling units a (post) drying can also take place

The housings can be designed so that they can be moved within limits. For this purpose, it is necessary that the dryer housing have enough room to slide on appropriate housing seating. As a result, in particular heat expansions of

Housing structure can be compensated. The hot air dryer system may further comprise viewing windows and sliding doors. Peripheral devices, such as fans, continuously variable three-phase drives with frequency converters etc. can also be provided.

It may be provided a combination of wire and round screen. In a combined arrangement of wire and round screen, the bottom wire located at the bottom for making paper and the top round wire for making cardboard may be provided.

The sheet formation on the wire is completed only after about 30 - 50 cm after exiting a fabric outlet lip, while the round screen the sheet formation already at the outlet of the scoop drum from the trough filling is completed. In the case of a wire, the main fiber orientation is sheet formation in the machine direction. During the scooping process on the round screen, the fiber orientation takes place almost uniformly in the longitudinal and transverse directions.

5

Sugrundsiebe can be designed as so-called non-porous Saugrundsiebe. The advantage of uniform fiber orientation is sacrificed, because each round screen has a closed Druckstoffauflauf, as on a Fourdrinier. However, each individual round screen retains its essential advantage, namely the time-related displacement of the individual round screen in relation to the simultaneously running drainage on a fourdrinier machine. This is speed advantage of the round screen over the drainage on a wire. The dewatering on the round screen takes place one after the other with a time lag - from a round sieve to a round sieve - resulting in higher speeds of a rotary screening machine compared to a fourdrinier machine.

In one embodiment of the invention, a cutting system with bypass can be provided. By means of the cutting machine with bypass 2o paper, as well as cardboard and corrugated board raw papers can be processed in the production line.

There may be a final group only for corrugated base papers and / or a Nadellochbügelpartie only for cardboard. Rollers (instead of sheets) can be produced in the final 25 group because corrugated board machines can only process rolls. In the case of the needle punching machine, the cartonboard manufacturers can be afraid of customer complaints, which always occurs when something new is used, such as: Legs Hot-air float drying instead of the previous one

Dry cylinder contact drying with steam.

Through the Nadellochbügelpartie a rewetting of the pulp web, in particular by appropriate roller arrangements, take place. The Nadellochbügelpartie can be arranged in the storage section.

In a further embodiment of the invention, a drying unit may be provided in front of the at least one sizing press. Through the drying unit in front of the sizing press, the cellulosic web can be largely pre-dried in the

Hot air float dryer system to be handed over. The

Hot-air dryer plant can therefore be made smaller. The drying unit provided in front of the sizing press can be designed above the wet end, in particular in the case of round screens, or as part of the wet end, in particular in the case of wire screens. The drying unit may have a metal mesh or a wool felt as a cellulose carrier.

It is particularly advantageous if the hot-air dryer installation has a three-line installation with drive, support and tension rollers arranged in a V-shape. The ropes can be made in submarine cable quality. The three-rope performance may have one lower strand and two upper strands. Furthermore, hippopotamus openings may be provided and there may be two sections for two different dryer areas, such. B. for thicker and thinner boxes, thicker pulp or thinner corrugated base papers such. As corrugated material and cover material may be provided. Depending on the design of the ropes or special cables, the cable be installed inside or outside the machine or housing.

After the hot-air float dryer system, a belt transport track with driven, antistatic and temperature-resistant subbands of about 10 cm width, with upper bands of about 5 cm width to a vertical storage section for a capacity of about 300 m or more track length can be provided. In addition to the storage function, this route also has the task of serving for the partial rewetting of the material web and for its cooling by two rotor disks accommodated in the roof of this line with spray nozzles, with water connections. The performance is best done by a separate Seilaufführstrecke, as previously mentioned. Furthermore, a climate station in the housing is advantageous, and possibly a Nadellochbügelpartie to close the pinholes. For this purpose, a commissioned work for a color-matched swelling agent suspension is used and enclosed by means of a hydraulic wedge in the cardboard surface, so as to close the hole craters.

It is particularly advantageous if a final group with lateral trimming cut, horizontal Poperoller with Tambourwechselvorrichtung and Tambourzieher is provided. In particular, a double-sided edge trimming device can be provided. The Tambourzieher can be provided for sleeve-fitted, pneumatic expansion spurs. If the production line is intended exclusively for cardboard or pulp, the final group need not have any other parts. However, if a production of corrugated base paper is intended, a roll-up can be provided in the final group, usually comprising a horizontal Poperoller with Tambourschnellwechseleinrichtung, a web separation device and removal by crane or by roll lowering. When using standard bambours should usually be rolled on cardboard sleeves. Known corrugators have working widths of ≥ 2,500 mm. By producing corrugated base papers with a matching narrow paper machine, you can save the cost of having a separate slitter rewinder. For this purpose, it is advantageous if equal to the Poperoller on sleeve-stocked pneumatic expansion spurs of z. B. 150 - 300 mm diameter and after the expansion tambour is removed by a Tambourziehgerät. This gives equal rolls on sleeves of 150 - 300 mm nominal diameter for the corrugator. The two-sided edge trimming can be done immediately before or on the Poperoller. For strongly running rollers, an automatic edge control can be used to minimize the edge strip width. Narrow raw paper machines can produce faster and cheaper than with wide machines.

According to the invention, a strip threading device can be provided. The strip width can be about 10 cm. The stripper transport to the first sizing press can be done by Nirosta tray rails with air support. The sizing press can be used for further dewatering or, preferably, as a balancing compensation and for leveling the web thickness. It is also possible to provide two calibration presses in tandem order. Furthermore, smoothing calenders may be provided for surface smoothing of the web.

For cable threading a BG (professional association compatible) suitable solution is required. This consists of a hippopotamus with an advanced pulley and two laterally offset and slightly offset to the rear roles for the two rope colonel ranks. The Aufführstreifenzufϋhrung done by a specially shaped sheet metal.

According to one embodiment, at least one, preferably a plurality of compensation devices can be provided to compensate for longitudinal shrinkage at standstill. In particular, a dancer roll member can be provided to compensate for the longitudinal shrinkage at a standstill. For tension measurement and control, an additional load-cell-mounted tension measuring roller can be provided for ongoing operation, with corresponding web looping. After the storage section can again be provided a dancer roller, which serves to compensate for the longitudinal shrinkage and a certain longitudinal expansion. This dancer roller can be designed with swivel arm bearing and round potentiometer in the pivot point for measuring the web tension and for controlling the tension at the cross cutter inlet.

In this context, it is advantageous if at least one, preferably a plurality of tension measuring devices, in particular tension measuring rollers, are provided.

According to one embodiment it can be provided that the cutting system comprises at least one cross cutter and one, preferably two, slitter. The cross cutter can be designed as a so-called inline simplex cross cutter fully synchronized with the web speed. The cross cutter can have two Gutbodenablagen with Umschaltweiche for the production of large stacks or for single stack weights up to about one ton. Only a good sheet storage with intermediate stacking by bar grate would be ideal, but eliminates because the Stabrostabstapelungstaktzeit would be insufficient. Desirable is a ton as stack weight, as this can easily be divided later into half stacks of 500 kg or small stacks of 250 kg. In a common format of z. B. 700 mm wide x 1000 mm in length, a net stack height of 1,350 mm, a specific gravity of z. For example 1, the stack weight is 945 kg and can be brought within a few seconds to just one ton by adding a few sheets. Furthermore, the machine preferably has a bad sheet storage of z. B. maximum of 1,000 mm height, arranged on a so-called shuttle car to extend, either on leader or on the drive side. A reject lock can be operated automatically or manually, with manual control taking precedence by ignoring or overriding the automatic control.

At the two Gutbogenablagen can be palletless stacked on conveyor belt and extended laterally or it can be provided for subsequent roller conveyor lines pallets. It can be provided that several format sizes are programmable and are used for automatic format adjustment of the front and side Rüttlerbleche in the two stock sheets and to correct the format adjustment on the Schlechtbogenablage, as well as format adjustment on longitudinal and transverse cutters, etc.

The storage device may have vertically movable rollers. The memory device can be used for a capacity of, for. B. 300 m or more, which would ensure that in an automatic format adjustment on the cross cutter continued running of the road at full speed is possible while the cross cutter is. In this case, the memory is filled and can then be slowly reduced again, without large Zugveränderungen. Up to 30 or more pairs of rollers can be used, which are driven by driven Spindles can be moved up and down. The pairs of rollers can be mounted at a distance of about 20 - 30 cm, to allow a performance between them by a renewed Seilaufführabschnitt. It can be provided that the upper rollers 2.5 m down 5 and the lower rollers reversed approximately 2.5 m upwards. The threaded spindles can be attached to a support frame and be supported by means of half shells on a ball bearing ball, so that tilting is not possible.

In the production line according to the invention, up to ten, preferably eight, non-porous Saugrundsiebe or Formerableitungen, in particular top former, gap former may be provided. In the suction suction sieves can be provided in the direction of rotation of the suction sieve or against the direction of rotation of the suction sieve a Druckstoffauflauf. i5 The pressurized fluid casserole can have a conical transverse distributor tube. The sieve suction rolls of the suction suction sieves can be completed by a discharge roll formed as a single-suction suction roll. The top cloth of the suction grass sieves can be made exclusively of wool felt. The sieve suction rollers can be equipped with a coarse-meshed lower support

20 sieve fabric, in particular stainless steel wire mesh, and a finer-meshed upper fabric, in particular stainless steel wire mesh, be covered. The Saugrundsiebe or Ableitformer can ktorwalzen without external Extra and be formed with at least one, preferably two, inner top cloth rollers.

25

For cardboard up to z. B. 1,000 g / m ² (about 2.3 mm thickness) may be provided preferably eight non-porous Saugrundsiebe the fourth and fifth generation of 1,200 - 1,300 mm diameter, the Saugrundsiebe can be covered with two-ply plastic sieve. At Saugrund-30 seven of the fourth generation, a closed pressure casserole can be used on the right, ie in the direction of rotation of the suction sieve be provided. In the case of suction sieves of the fifth generation, a closed pressurized material casserole can be provided on the left, in particular counter to the direction of rotation of the sieve suction roll. Suction sieves of the fourth generation are 5 preferably for the production of maps, pulp u. Ä. Used, but not for so-called testliner. Suction sieves of the fifth generation are preferably used only for testliner.

The sieve suction rolls can be mounted on retractable and retractable trolleys with a single-sided toothed belt, wherein a rotary drive on the driver's side and an extension drive on the drive side with racks and pinion approach can be provided.

The suction box can be hung on three self-supporting, stainless and rotatable by 180 ° i5 support rods, the support rods may have a diameter of about 70 mm. The support rods can be stored in a double frame with spacer bushes. The suction box can have four suction chambers with soft rubber seals and deflection compensation. An extension drive can work on two

2o drive-side Ausfahrrillenrollen act. The sieve suction roller can be supported in the non-perforated edge area by two rubberized support rollers. The drive of the suction sieve can be done by spoked wheel insert on the driver's side. The pressure roller can be designed as Einkammersaugwalze with supply and shutdown via Drehexzenternocken. The

25 Top cloth can be made as a wet fabric in multiple layers. For machine downtime, a set of spray nozzles per round screen and built-in spray water spray for the Saugwalz seals may be provided as a lubricant. This results in the theoretical possibility of such a production line with material web at night as well

30 to continue without staff. Furthermore, a horizontal or vertical high pressure water jet cleaning may be provided for the top cloth. Under the Rundsiebnasspartie flat Nirosta drip pans can be provided with two processes. An execution of the top cloth only made of wool felt leads to a better adhesion.

The headboxes for the round screens preferably consist essentially of a conical transverse distributor tube, possibly with a built-in, driven screw, or else with an external, periodic ultrasonic device for better fiber swirling of the fibers in the stock suspension. Furthermore, in the mounted, ascending transverse shaft to the actual Stoffauslauflippe a Schachtausbeulung with therein racket roller for striking fiber nodes, with variable speed drive, are provided. Due to its drive as a final metering pump, the club roller also acts in front of the headbox.

At the end of the wet end, a blower roll with controllable blowing power can be provided as a take-off and transfer aid for the web and the leader-side threading strip.

Furthermore, a pneumatic tensioning device may be provided for the top cloth. The clamping can be done by means of two outer stand in conjunction with the storage of the lower inner-Oberertuchsaugwalze by processes on the foundation rails and with mechanical wedging on the foundation rails.

At the end of the wet end a blanket change aid can be provided. The blanket changing aid may include a blanket hanging device at the end of the wet end. In the headboxes of Saugrundsiebe or Formerableitungen profile bars can be provided with rotary actuators for the production of Aufführstreifen. The Aufführstreifen can have a width of about 10 cm.

A stainless steel tray rail with air support may be provided upstream of a first sizing press.

Furthermore, air sliding tables can be provided. As a result, gaps, especially in the wet area, can be bridged. The sliding tables may have a stainless steel table top that can be polished and 0.5 to 1 mm thick. Furthermore, holes can be provided at a distance of about 10 cm, which are supplied in rows of pressure chambers below it with compressed air of about 2 bar. When the air emerges from the bores, a slight negative pressure to the ambient air of about 1 bar, which causes the material web is pressed flat on the table top, while still leaving enough air as a sliding film between the material web and table top, so that the Easily move web by finger pressure. The compressed air can be provided by a central pressure supply. Alternatively, local compressors can be used.

According to the invention, two cross-cutting stations can be provided in tandem arrangement. As a result, machine downtime can be avoided when changing the cross section diameter. In this case, a second identical drive for the second cutterhead of the cross cutter can be used, in particular in mirror image offset: arrangement on the drive side and leader side of the machine. For the slitter an individually driven upper blade can be provided. The slitter may have hardened driven upper blade with side adjustable holders, the upper blade are arranged opposite a Mehrfachnutwalze. The slitter may have an upper and lower holder with electronic positioning. The positioning of the upper and lower holder can be done electronically. As a result, an accuracy of one tenth of a millimeter can be achieved. The upper and lower holders may include an electromagnetic support and fixation by three conical fixing pins.

The crucial difference between cutting paper on one side and cardboard, pulp, cardboard and corrugated cardboard on the other side is the web thickness of up to over 5 mm compared to a thin sheet of paper about 0.1 mm thick. In a cutting process usually cuts an upper blade against a lower blade with an overlap, which must always be a track greater than the material web thickness. When knife delivery of upper blade against lower blade is usually a two-way movement "down and ran." Furthermore, on paper machines with a so-called Vorschneidwinkel of about 1 ° - 3 ° worked and kept the blade overlap as low as possible for a good cut.

It is advantageous to use both upper and lower blades driven by friction on both sides instead of friction-driven upper blades, and a supply and return as a two- or three-fold movement, ie 1 - 2 mm settling, pulling up or pressing, then tilting, z. B. 45 °, or flat position, z. B. 90 °, perform the upper blade. In the production line according to the invention, a completely automated production process is conceivable. A knife change for the longitudinal section may therefore do not cause downtime. Therefore, it is advantageous if two identical slitters are provided in tandem arrangement and in immediate succession. These slitters preferably have individually driven lower knife holders and are likewise attached.

5 driven single upper knife holders, both with automatic synchronous adjustment. Preferably, the two upper knife holder in each of the two longitudinal cutting stations are electrically interconnected and connected so that the used upper blade of the station, which had cut so far, continues to run for about 10 seconds and cuts, o after the outer knife of the other station is already engaged and mitschneidet. Only then the old upper knife goes out of engagement, moves up or is pushed high and then goes as a three-way movement in 45 ° -Schrägstellung or in 90 ° flat position to be able to be re-equipped. 5

The slitter may comprise an electromagnetic knife holder plate with three conical locating pins. The upper blades of the previously cutting longitudinal cutting station can be removed by a robotic arm and re-equipped by grabbing a grasping forceps of the robotic arm grasps the knives of the previously cutting station, takes off and disposed of. Furthermore, it can be provided that the upper blades are no longer screwed to the upper blade holders, but these are magnetically fixed and held laterally by the gripping tongs of the robot arm via three conical fixing pins of an electromagnetic holder plate to the upper blade holders as soon as the electromagnet receives power. They are held there as long as the holder remains powered. As an alternative to a robot arm, a movable emergency seat with a crossbeam for blade replacement on a running machine can be provided with appropriate retaining straps so that the blade replacement can also be performed by a human. For longitudinal cutting on thick cardboard, cardboard and corrugated board in the thickness range of 2.5-5 mm, it may be advantageous to provide hardened, driven upper blade with manually or automatically adjustable side holder for longitudinal cutting with extremely high lead over a Mehrfach- grooved roller as a counter support roller without knife contact whereby the upper blades can rotate with about 300% lead over the Nutstützwalze and literally saw through the material web.

Furthermore, a pneumatic pressure roller with employment from below against the last Papierleitwalze before Querschneidereinlauf to provide an additional clamping press for web fixation at a standstill and to relieve the Querschneidereinzugspresse be provided in order to avoid dents in the neoprene jacket of the intake press. Furthermore, a transverse cutting inlet skirt can be provided for the automatic entry of the material web into the cross cutter. The cross cutter inlet skirt may comprise either a powered belt system or a vacuum and air assist screen apron or the like.

It can be provided that the machine or production line according to the invention is operated by means of frequency-controlled three-phase motors. To control a sound-damped cab can be provided on an extension of the cross cutter circulation platform on the driver's side. Four speed settings can be provided: a creep mode in five minimum levels of 1 - 5 m with self-locking and audible click, performance speed of 12 m / minute with grid point and click, open operation on the cross cutter with 70 m gap and desired operating speed through rotary rheostat from 150 - 300 m. The electrical wiring can be done by looping in the floor or laterally high suspended cable supplies on the machine. Furthermore, a display beam can be provided with 45 ° rotation over the cross cutter for displaying the residual moisture or the Atrogehalts and the web temperature.

During the lateral removal of the stack, these can be successively pulled apart, so that a space is created, the z. B. sufficient for slipping over a shrink film hood.

If corrugated base paper is to be produced, the cross cutter is not needed. This can z. B. be run over. This is the bypass. For reeling the use of the flying reel change is proposed. For the flying role change on the roll-off side of a corrugated cardboard machine sleeve-equipped expansion spurs with cardboard sleeves, plastic sleeves or aluminum or steel sleeves should be provided. In addition, a Tambourausziehvorrichtung with expansion struts including preparation by means of double-sided adhesive tape for web takeover after the separation process is advantageous.

The corrugated base paper rolls produced in this way can thus be delivered to sleeves on the corrugated cardboard machine and taken up there without a roll bar.

If, on the other hand, the cross cutter is used and thus sheets are cut, these sheets must be stacked. For this purpose, it is proposed to use pallets made of impact-resistant plastic. These should have a sub-alignment of about 1 cm below the respective format size. Different colors of pallet size markings on lowering platforms and sliding slats for pallet fixing are advantageous and guidance when extending. Furthermore, needle bearing bed strips for extending support, in conjunction with pneumatically or hydraulically operated pusher plate on the leader side are advantageous. A color-contrasting pallet magazine for the most common main formats is also advantageous. When packaging shrink film packaging in conjunction with plastic pallets is eligible. A shrink film hood in conjunction with a plastic pallet survives in free storage undamaged even downpours and is not subject to any pollution. The shrink-film hood application can be made via a slip-on robot.

10

Further features and advantages of the invention will become apparent from the following description of an embodiment of the invention, with reference to the figures of the drawing, the invention essential details show, and from the claims. The individual features can each be implemented individually for themselves or for a number of them in any combination in a variant of the invention.

A preferred embodiment of the invention is shown schematically in the drawing and is explained below with reference to the figures 2o of the drawing.

Show it:

Fig. Ia, Ib two parts of a production line according to the invention, 25 wherein the Fig. Ib right adjoins the Fig. Ia;

2 shows the embodiment of a three-rope performance; and 3 shows a front part of a further embodiment of a production line according to the invention with an upstream drying unit.

In FIGS. 1a, 1b, a production line 10 is shown. In the exemplary embodiment, a wet end 11 has eight non-porous suction base sieves 12 to 19. The wire suction rolls 20 to 27 have a lower coarse-meshed support wire and an upper fine-mesh steel fabric wire. The material of the top cloth is either needled wool felt fabric with a clip seam or a multi-ply plastic fabric with Ösennahtver- bond. The top cloth (seen in the figure along with the paper run) should have the highest possible adhesion behavior. The wet end 11 is followed by a press 30, before a hot air dryer plant 31 follows.

The hot air dryer plant 31 has in the exemplary embodiment an effective dryer section of 72 m divided into three sections of 24 m, each section divided into 3 x 8 m dryer section on. The hot air temperature is about 300-350 ⁰ C. Heated is the hot air floatation dryer plant 31 with natural gas or LPG. The sections of the hot air dryer system 31 are designated by the reference numerals 32 to 40. The sections are arranged in different floors, in the embodiment in three floors. The material to be dried is guided over deflection rollers 41, 42. The flame height or temperature control can be stepless, manual or automatic. A circulating air distribution is 2/3 from below and 1/3 from above. At the hot air dryer system 31 peripheral devices may be provided, such as external fans and drives, burners and combustion chambers, exhaust air and fresh air supply, not shown. For the two upper floors, catwalks with stairs and railings can be be provided on the rerseite. Furthermore, viewing windows with interior lighting are provided for web observation. Cross webs can also be provided. The deflection rollers 41, 42 may be designed as Luftkissenumlenkrollen.

In the transition region between the hot air dryer plant 31 and a storage device 45, a compensation device designed as a dancer roller member 46 may be provided. This can be provided for train measurement and train compensation. It can have driven, temperature-resistant antistatic lower bands and upper bands. The storage device 45 has rollers 47, 48 which are vertically movable to change the storage path. The second function after storage is the air conditioning of the web for cooling and partial rewetting by two mist atomizers 49, 50 mounted on the storage roof. In the storage device 45, a climate monitoring station may be provided. After the storage device 45, a compensation device 51 designed as a dancer roller member is again provided before a cutting system 52 with a bypass 53 follows in front of a rear group 54.

During the storage filling results in an increasing train increase for the material web, which can be compensated by the buffer function of the two equalizers 46, 51 only a few seconds. Therefore, it is expedient to provide automatic switching of all distance-dependent electric drives from a speed control to a train control.

The cutting unit 52 has two slitters 70, 71 in tandem arrangement and cross cutter 73 in tandem arrangement. The cut by the cross cutter 73 sheets are in Stacking devices stacked. In the final group 54 is a

Rolling provided. Before the cross cutter 73 is a

Pull-in press 72 is provided. In addition, a trimming cutter 74 is shown.

2 shows a Dreiseilaufführung in V-shaped arrangement. In Fig. 2, a lower rope strand 60 is shown with a diameter of about 10 - 12 mm. This is located in the middle in the Aufführstreifen. The two thinner upper cords 61, 62 have a diameter of about 7 - 8 mm. You can jump up to the position shown, wrapping the strip and holding it on the side.

The paper or the carton lies in the wet state around the thicker lower strand 60 and the two upper strands 61, 62 both press the paper 63 together over the thick lower strand 60.

FIG. 3 shows a further exemplary embodiment of a production line 100 according to the invention. In contrast to the production line 10 according to FIG. 1, the production line 100 has a drying unit 102. In the drying unit 102, the pulp drawn in a wet end 110 is supported by a sieve 104. The drying unit 102 is arranged above the wet end 110. In the case of wires, the drying unit 102 can also be arranged directly in the wet end. After leaving the drying unit 102, the pulp has an Atro content of more than 70%. A hot air dryer plant 310 can therefore be dimensioned correspondingly small. The hot air dryer system 310 in this case consists of a hot air drying floor 320, followed by two cooling floors 330, 340 for cooling the pulp. The cooling floors 330, 340 are embodied as floating radiators or have floating radiators. A However, hot-air strip dryer installation 310 according to the exemplary embodiment of FIG. 3 can also be used in production lines which do not have a drying unit upstream of the sizing press.

Claims

Claim e

1. Production line (10, 100) comprising:

a. a wet end (11, 110) with a plurality of suction sieves (12 - 19) or shaper discharges or longitudinal sieves;

b. at least one sizing press (30);

c. a hot air dryer system (31, 310);

d. a memory section (45),

e. wherein the hot-air dryer system (31, 310) is designed as a hot air dryer system.

2. Production line according to claim 1, characterized in that the Heißluftschwebetrockneranlage a plurality of superposed drying (320) and / or cooling layers (330, 340).

3. Production line according to one of the preceding

Claims, characterized in that a cutting system (52) with bypass (53) is provided.

4. Production line according to one of the preceding claims, characterized in that a final group (54) is provided only for corrugated base papers and / or a Nadellochbügelpartie only for cardboard.

5

5. Production line according to one of the preceding claims, characterized in that a drying unit (102) in front of the at least one sizing press (30) is provided. 0

6. Production line according to one of the preceding claims, characterized in that the hot air dryer system (31, 310) is fired by means of liquid gas or natural gas. 5

7. Production line according to one of the preceding claims, characterized in that the hot-air dryer system (31, 310) has a three-rope performance with V-shaped drive, support and tensioning rollers.

8. production line according to one of the preceding claims 4 to 7, characterized in that the final group (54) is provided with lateral trimming cut, horizontal pop-roller with 5 Tambourwechselvorrichtung and Tambourzieher.

9. production line according to one of the preceding claims, characterized in that a Streifenaufführvor-0 direction is provided.

10. Production line according to one of the preceding claims, characterized in that at least one compensation device (46, 51) is provided to compensate for longitudinal shrinkage at standstill.

11. Production line according to one of the preceding claims, characterized in that at least one tension measuring device is provided.

12. Production line according to one of the preceding claims, characterized in that the cutting device (52) comprises at least one cross cutter (73) and a longitudinal cutter (70, 71).

13. Production line according to one of the preceding claims, characterized in that the storage section (45) has vertically movable rollers (47, 48).

14. Production line according to one of the preceding claims, characterized in that at the Saugrundsieben (12 - 19) a Druckstoffauflauf in the direction of rotation of a suction sieve (20 - 27) or against the direction of rotation of the suction sieve (20 - 27) is provided.

15. Production line according to claim 14, characterized in that the Druckstoffauflauf has a conical transverse manifold.

16. Production line according to one of the preceding claims, characterized in that the sieve suction rolls (20 - 27) of the Saugrundsiebe (12 - 19) by a respective Einkammersaugwalze formed Abgautschwalze complete.

5 are.

17. Production line according to one of the preceding claims, characterized in that an upper sheet of Saugrundsiebe (12 - 19) consists exclusively of wool felt.

10

18. Production line according to one of the preceding claims, characterized in that the suction suction sieves (12-19) have suction suction rolls (20-27) which are covered with a coarse-meshed lower supporting sieve fabric and a finely meshed upper fabric.

19. Production line according to claim 18, characterized in that the lower Stützsiebgewebe and / or the upper fabric made of stainless steel wire mesh

20 are.

20. Production line according to one of the preceding claims, characterized in that the suction suction sieves (12-19) or discharge shapers without external extractor

25 rollers and are formed with at least one inner top cloth roller.

21. Production line according to one of the preceding claims, characterized in that at the end of the wet end

30 (11, 110) a blow roll with adjustable blowing power than Acceptance and transfer aid for the web and the leader-side Aufführstreifen is provided.

22. Production line according to one of the preceding claims 5 che, characterized in that a pneumatic

Clamping device for the upper cloth of the Saugrundsiebe (12 - 19) is provided.

23. Production line according to one of the preceding claims, characterized in that at the end of the wet end

(11, 110) a blanket change aid is provided.

24. Production line according to one of claims 14 - 23, characterized in that in the headboxes of the i5 Saugrundsiebe (12 - 19) profile bars with rotary drives for

Production of Aufführstreifen are provided.

25. Production line according to one of the preceding claims, characterized in that a first calibration

20 press (30) in front of a Nirosta tray rail with

Air support is provided.

26. Production line according to one of the preceding claims, characterized in that provided Luftgleittische

25 are.

27. Production line according to one of the preceding claims 12 - 26, characterized in that the cross cutter (73) has two Gutbogenablagen.

30

28. Production line according to one of the preceding claims 12-27, characterized in that the cross cutter (73) comprises a switchover switch.

5 29. Production line according to one of the preceding claims 12 - 28, characterized in that two transverse cutters (73) are provided in tandem arrangement.

30. Production line according to one of the preceding claims, characterized in that, for the

Slitter (70, 71) an individually driven upper blade is provided.

31. Production line according to one of the preceding claims 12 - 30, characterized in that the

Slitter (70, 71) has hardened driven upper blade with side adjustable holders.

32. Production line according to one of the preceding claims 20 che 12 - 31, characterized in that the

Slitter (70, 71) has an upper and lower holder with electronic positioning.

33. Production line according to one of the preceding 25 claims 12-32, characterized in that the

Slitter (70, 71) has an electromagnetic knife-holding plate with three conical fixing pins.