DE102009002571A1 - Arm for sheet-fed printing press, has dryer system with drying stations formed by dryer modules implemented as cartridge-like modules, where each dryer module comprises infrared-radiation source, thermal air source and suction device - Google Patents

Abstract

The arm has an integrated dryer system with multiple drying devices that are arranged consecutively in a sheet running direction. A printing substrate is subjected to impact by electromagnetic radiation and/or dryer air (TL) by the dryer system. Suction air (ABS) is removed within a region of a drying section. The dryer system has multiple drying stations formed by dryer modules (1-5) that are implemented as cartridge-like modules homogeneous in basic structure. Each dryer module has an infrared-radiation source, a thermal air source and a suction device.

Description

Field of the invention

The The invention relates to a boom for a sheet-fed printing machine with an integrated end-dryer system that's performing an end-sheet drying is used.

Background of the invention

Out DE 29 507 173 U1 For example, a boom for a sheet-fed printing machine is known, which as such comprises an arc entrance area, a substantially horizontally aligned transfer area and a storage area extending over a sheet stack. In that, substantially horizontally formed transfer area, a drying section is realized, within which heated by a heater heated air is applied to the substrate. The air which accumulates here with dryer vapors is sucked off via a suction device.

Out DE 20 214 983 U1 is also known a dryer for a printing press. This dryer comprises a plurality of sequentially arranged in the direction of sheet travel radiant heater, which can be controlled with a higher than for the printing operation required per se. Furthermore, the dryer also includes hot air nozzles, which are required with hot air at a higher temperature than required for the printing process itself.

at the widespread, for use in conjunction with sheetfed presses Providers, the problem is that in the boom completed end-sheet drying with a relatively high power consumption is connected and in this boom high exhaust air streams attack.

Object of the invention

Of the Invention has for its object to provide solutions which makes it possible within a wide print job spectrum to perform an efficient sheet drying and for each print job well fitting setting of the end-dryer to realize in an advantageous manner.

invention solution

These The object is achieved by a boom for a sheetfed press with an integrated Drying system arranged with several in the sheet running direction sequentially arranged Drying equipment, whereby this boom is characterized, the drying devices as in their basic structure similar Dryer modules are the one IR radiation source, a thermal air source and a suction device.

Thereby it is possible in an advantageous manner, a boom to create at which the local energy input and a for the local emissions sufficient exhaust air flow for each dryer module at a locally at least largely balanced Air flow balance can be matched.

By The concept according to the invention makes it possible through the dryer system with high flexibility and success security to take into account job specificities. Especially Advantageously, it is possible by a pre-definable Configuration of the individual dryer modules to ensure that achieved by this already at the initial setting high quality drying results become. By erfindungemäße concept is It is possible in a particularly advantageous manner, the radiation input, as well as the entry of dryer air comparatively exact on the Adjust format width of the processed substrate.

Preferably each dryer module is adjustable and operable so that for this a balanced balance of the supply and exhaust air flows results.

According to one particular aspect of the present invention are the dryer modules as cassette-type dryer modules, in particular as relatively flat, box-like structures with integrated channels running. The cartridge-like dryer modules can be in an advantageous Be carried out as Abkant sheet metal cassettes. Farther it is also possible, the dryer modules at least in sections, especially in the longitudinal side surface area To produce aluminum extruded profiles.

The Integration of the dryer modules in the boom is preferably carried out by module holding devices. These are preferably designed such that the cartridge-like dryer modules in an intermediate area between the leading lower looper chain center and the returning upper one Gripper chain center are insertable. It is possible, to design the dryer module holding devices so that the working position each recorded dryer module in a small adjustment range, variable in particular with regard to the distance to the sheet career is.

According to a particular aspect of the present invention, the dryer modules are preferably designed in such a way that they are compatible with a plurality of holding structures provided successively along the drying section, and thus unaffected are interchangeable. This makes it possible to vary the sequence of different set, and possibly also differently equipped dryer modules, taking into account special properties of the printing material to be processed.

The Dryer modules are preferably with IR radiation sources, with UV radiation sources and blowing nozzles and suction devices.

The Dryer modules can be designed so that the internal Equipping the same modular with large Freedom of design can be made. That's the way it is possible, the cartridge-like modules before insertion into the To configure the boom so that the number of any active IR radiation sources, as well as the air outlet area one over the corresponding one Dryer module realized dryer air nozzle assembly and if necessary, the integrated suction channel device on the format width are matched to the processed substrate.

According to one particularly preferred embodiment of the invention the dryer modules are designed so that the IR or UV radiation sources through juxtaposed, aligned in sheet travel direction, d. H. oriented transversely to the longitudinal direction of the insert cassette Lamp bulbs are formed. Preferably, these lamp bulbs selectively connectable, so that only one of the format width of the processed Substrate corresponding area within the cassette-like Modules actually becomes active. As far as the dryer modules equipped with dryer air supply organs, it is possible to lead this dryer air such that through this the Lamp flask and / or the mirror of the lamp flask cooled become. This makes it possible over the lamp envelope also make a dryer air heating. alternative to the aforementioned, longitudinally oriented and optionally selective connected lamp envelope, or in particular in combination hereby it is also possible to use lamp flask the extend transversely to the sheet travel direction.

The Dryer modules are preferably also provided with Luftabsaugstrukturen. These Luftabsaugstrukturen are preferably designed so that for each dryer module in the basic state set an operating state which is already a substantially balanced one Air balance results. This setting state is preferably in one variable range.

Preferably are in the area of the boom air ducts provided, which can be coupled to the dryer modules. These air ducts are preferably designed so that substantially to the format center achieve symmetrical suction flows. These symmetrical Absaugverhältnisse can be particularly by either in Substantially central connection of the machine-side air duct to the respective dryer module, or also by two-sided connection of reach machine-side air ducts. The dryer modules can be designed so that the inner Assembly of the same is variable. Furthermore, the Dryer modules preferably designed as inserts, from the side of the boom in this insertable or can be pulled out of this. The insertion or removal of the cassette-type dryer modules can by management structures, especially telescopic rail systems are supported. It is possible to use slides on the respective dryer modules, Flaps, or other adjusting and throttle bodies provide over which Luftzu-, or air outlet streams adjusted and dosed can be.

By the inventive concept makes it possible in the area of the boom IR dryer air and suction air components advantageously for a particular section of the Configure sheet path in advance and in one on each print job to arrange optimally coordinated manner. This makes it special possible to achieve a required drier effect To minimize the required energy input and also any Dissipate emissions with a relatively low exhaust air flow.

By the inventive concept makes it possible the boom with respect to the hereby achievable dryer performance be configured so that even at relatively high machine speeds a required dryer effect is reliably achieved.

The inventive design of the boom allows it, the IR and TL energy as well as ABS air flow along the drying line as needed on site and with large To adjust flexibility. In an advantageous way thus the adjustment of a balanced air balance by supports the modular design. Based on the invention proposed Construction of the respective Einsatzkassetten can all dominate Set parameters and thus the system precisely on the Vary peculiarities of each print job.

The dryer modules designed as IR-TL-ABS combination insert cassettes are preferably designed as modules which are similar in terms of their external geometry or at least with regard to their installation interfaces or at least to the existing holding devices. ever The dryer module, which is designed in particular as an insert cassette, can be designed in such a way that a balanced air flow balance can be realized within it.

Design of IR radiation sources:

• - The IR lamps are preferred along, d. H. installed in sheet travel direction with the advantage that the outer IR lamps in small (narrow) formats can be turned off. It follows: energy savings, no unnecessary energy input into the machine.
• - The IR bulbs can also be used as alternately be executed different types. This will It is possible to use different wavelength range over one use to provide optimal radiation conditions for different applications to reach. Each lamp is preferably with an effective one Mirror equipped. The IR lamps and possibly also the mirrors are in this case, preferably via the above emerging and thereby warming air of the dryer air duct cooled.

Design of the dryer air supply (TL):

• - The dryer air supply can preferably by a channel structure incorporated in the insert cassette, in particular a sheet metal box accomplished with air guide elements are from which the hot air against one with outlet openings, in particular tuyere holes provided cover bottom is blown off the bow.
• - The control of the dryer air flow is preferably one-sided or double-sided via a throttle flap, which over an engine valve is controlled.
• - The generation of the dryer air can be done in a heating coil, possibly done outside the mission or already immediately in the exit area of the insert cassettes.

Design of the air extraction (ABS):

• The ABS is preferably on the sheet metal box of the TL dryer docked, se separate suction unit.
• - The suction is preferably carried out after a blocking distance or behind a flow barrier in one of the dryer air entry area separate area.
• The suction preferably takes place diffusely on the Sheet width.
• - The control of the suction is preferably one or both sides with a throttle valve with a motor valve.

A Plant constructed according to the invention the entry, the IR and TL energy and the derivative of the ABS along the drying line as needed, on-site and flexible.

By the inventive concept, it is possible to implement an air management in the area of the boom through which a balanced air balance results along the drying line, that is, V _ab = V _to with the aim to produce no pressure and no negative pressure in this region of the boom. Consequently, by the channeling of the air streams, the method of Bogenfüh tion, drying with the dryer suction and pollination can be controlled more easily.

• – Anfang der Trocknerstrecke (Bogenaufgang): IR- hoch; TL-niedrig; ABS-niedrig.
• – Mitte der Trocknungsstrecke: IR-mittel; TL-hoch, ABS-mittel.
• – Ende der Trocknungsstelle: IR-niedrig; TL-hoch; ABS-hoch.

The system according to the invention preferably consists of the IR-TL-ABS dryer modules designed as cassette-type structures. These cassettes are preferably the same in their basic construction. The TL air supply, the IR energy supply and the ABS air exhaust are adjustable as required along the drying path. This enables a good dosage of the IR, TL, ABS performance on site and thus a dryer optimization tailored to the respective print job. Although the modules are preferably made similar in their basic structure, the setting of each module can be changed and thus an overall optimum machine setting can be achieved. The power along the drying section can be adjusted in particular as follows:

• - Beginning of the dryer section (arch entrance): IR high; TL-low; ABS-low.
• Middle of the drying section: IR medium; TL high, ABS medium.
• - end of drying point: low IR; TL-high; ABS-high.

These in each case specific basic setting for each application may be in the area of the boom or the central control preferably programmatically saved and corresponding for recurring print jobs be retrieved. The advantage of the system: With the same hardware different effect and thus different application.

The Extraction of the used and at the same time in the sense of the aerial balance surplus Air takes place along the drying section. A central, along the receding gripper systems and down to the entire Dryer room impacting hot air extraction can be omitted or in Their dimensions are significantly reduced.

The drying section, so the arch, as well as the extension to the display towards the top, the bottom and side is preferably closed relatively tight. In the boom occurring air currents are consequently by the unwanted "False air flows" is not affected. The flow situation can be better controlled by the concept according to the invention. The arrangement of the dryer assemblies forms a total of a closed unit that separates the two areas of the path of the gripper systems from each other.

The Air supply in the dryer area can along the deriving gripper systems distributed from above done. The advantage of this is that the local airline deficits along the dryer section are compensated by the shortest route can. The construction of the dryer system allows an effective optimization of the drying process. The inventive Solution also makes a contribution to energy-saving Machine.

Brief description of the figures

Further Details and features of the invention will become apparent from the following Description in connection with the drawing. It shows:

1 a schematic representation of the construction of a boom according to the invention for a sheet-fed press with integrated modular dryer system.

2 a detail view illustrating the construction of a portion of a boom according to the invention for a sheet-fed press with integrated modular dryer system;

3 a vertical section to illustrate further structural details of a present invention provided with cassette-like insert modules boom.

Detailed description the figures

The in 1 As shown, the jib serves to receive the sheet entered in an sheet entrance area BE, the final drying thereof, and the formation of a sheet pile S.

The Promotion of the bow from the entrance area BE to the sheet pile S takes place via a gripper chain GK, on which in itself known manner gripper systems are mounted, which each in the bow entrance area BE picked up arc over the lower, from the entrance area BE to the sheet stack S current Transporttrumabschnitt promote the gripper chain device GK.

Of the between the sheet entrance area BE and the sheet stack S lying Area of the boom forms a dryer section through which the can be dried by the gripper systems dragged sheets.

In the boom for a sheet-fed printing press shown here, the dryer section is formed by insert cassette-like designed dryer modules along the sheet path 1 . 2 . 3 . 4 . 5 The optional and dosed an IR impingement, a dry air supply and a Dryerluftabsaugung allow. In the area of these dryer modules 1 . 2 . 3 . 4 . 5 If necessary, the printing material can be exposed to electromagnetic radiation, in particular IR radiation and / or UV radiation, and to typically heated dryer air.

The dryer modules 1 . 2 . 3 . 4 . 5 are executed in this embodiment as cassette-like insert modules. The insert modules are suspended over several holding devices H3, H4, H5 along the sheet travel path.

at The embodiment shown here are the insert cassettes constructed as box-like units, each of which corresponding holding devices H3, H4, H5 of the boom compatible are. In the embodiment shown here comprises each insert cassette comprises an IR radiation device, a dryer air inflator TL as well as a Absaugkanaleinrichtung ABS. The insert cassettes are designed so that over this one each for Each insert cassette largely balanced airflow balance can be achieved can.

The Insert cassettes are designed so that immediately after insertion the same in the boom a corresponding connection to the derivative of over the suction channels ABS discharged air in the area of the boom is enabled. The suction of the dryer air through the dryer air elements of the insert modules M3, M4, M5 takes place preferably from an upper region of the boom. Through this concept It is possible by suction of the dryer air at the same time a flushing of the upper portion of the boom and thus an advance of any powder-contaminated air in the Area of sheet input BE to bind. The boxy here trained housing of the insert modules are at the here shown embodiment as Abkantblechgehäuse executed and provided with slide-in structures, the the holding devices H3, H4, H5 are compatible.

Depending on each print job-specific characteristics of the boom according to the invention can be equipped with appropriate insert modules. The insert modules may preferably also be based on the respective print job configured configured to be equipped in particular with appropriate radiation sources and air nozzle devices.

The respective insert modules are preferably designed so that For each module, a largely balanced airflow balance results. Preferably, the Einblasvolumenstrom the dryer air in each insert module, and preferably also the suction air flow from the respective insert module still in a the standard setting variable by +/- 30% range.

In 2 the structure of the boom according to the invention is further illustrated. The IR-TL-ABS insert cassettes 20 . 21 . 22 are built as always the same looking modules. Each insert cassette 20 . 21 . 22 is operated so that this results in a substantially balanced balance of the thermal air flow TL and the Absaugluftstroms ABS.

How out 3 The IR lamps are visible 23 along, installed to the sheet travel direction with the advantage that the outer IR lamps 23 can be switched off in small (narrow) formats. This results in a considerable energy savings, as well as no unnecessary energy input into the machine. The IR lamps 23 can even be alternately of 2 types, for different wavelengths for different applications. This increases the universality of the system. Preferably, each lamp is 23 equipped with an effective mirror. The IR lamps 23 are cooled with the drüber exiting hot air of the TL dryer. The cassette-like insert modules 20 is located between the side walls 31 . 32 of the boom in an intermediate region between the upper looper chain guide 33 and the lower looper chain guide 34 , Below the cassette-like insert module 20 is a ground cover 35 provided by which of these boom area is sealed off from the environment down.

As turn out 2 The TL dryer is visible 24 designed as a sheet metal box and, with air ducting elements 25 fitted. From this metal box, the discharged hot air can escape against the bow.

The control of the Thermoluftzustroms TLV is carried out on one side or both sides via a controlled by an actuator throttle. The heating of the thermal air supply TLV can take place in a heating register, outside the dryer room or already directly before the discharge in the insert cassette of the TL dryer 24 ,

The ABS suction device is one on the sheet metal box of the TL dryer docked, but fluidic partly separated Suction unit. The extraction takes place after a barrier, from the entry area the thermal air spaced or separated. The suction takes place diffuse on the sheet width. The control of the suction takes place operated on one side or on both sides via a means of an actuator Throttle. The system constructed in this way accomplishes the entry the IR and TL energy and the discharge of the suction air flow ABS along the drying line as needed, on-site and flexible.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 29507173 U1 [0002]
• - DE 20214983 U1 [0003]

Claims (20)

Boom for a sheet-fed printing machine with an integrated dryer system with a plurality of arranged in the sheet running direction drying devices, via this dryer an impingement of the substrate with electromagnetic radiation (IR) and / or dryer air (TL) takes place, and in the drying section a discharge of suction air (ABS ), characterized in that the drying system comprises a plurality of drying stations formed by dryer modules, and that the dryer modules are designed as in their basic structure similar modules comprising an IR radiation source, a thermal air source and a suction device. Boom according to claim 1, characterized the dryer modules are designed as cassette-type modules are. Boom according to claim 1 or 2, characterized that the IR radiation sources are arranged side by side and aligned in the longitudinal direction of the sheet travel path Lamp bulbs are formed. Boom according to claim 2 or 3, characterized that these lamp bulbs are selectively connectable. Boom according to at least one of the claims 1 to 4, characterized in that two with respect to the wavelength the radiated light different types of IR lamp envelope alternately arranged side by side in the dryer module are. Boom according to at least one of the claims 1 to 5, characterized in that the IR radiation sources in Shape of transversely aligned to the sheet running direction lamp envelope are provided. Boom according to at least one of the claims 1 to 6, characterized in that each lamp bulb is a mirror assigned. Boom according to claim 7, characterized that the air supply is accomplished such that the lamp envelope and / or overflow the mirrors thereof through the dryer air and thereby cooled. Boom according to at least one of the claims 1 to 8, characterized in that the TL dryer as a sheet metal box is executed with air guide elements, wherein about those air guide elements hot air against the substrate can escape. Boom according to at least one of the claims 1 to 9, characterized in that the control of the TL air supply (TL = dryer or thermo-air) on one or both sides over a motor-driven throttle device is accomplished. Boom according to at least one of the claims 1 to 10, characterized in that the dryer or thermo-air heated in a heater outside the dryer room becomes. Boom according to at least one of the claims 1 to 11, characterized in that the dryer or thermo-air is heated before exiting in the cassette. Boom according to at least one of the claims 1 to 12, characterized in that the air suction device as a docked to a sheet metal box of the TL dryer, running separate suction unit is. Boom according to at least one of the claims 1 to 13, characterized in that the suction after a Blocking distance from the thermo-air injection area is spaced. Boom according to at least one of the claims 1 to 14, characterized in that the suction on diffuse the sheet width is done. Boom according to at least one of the claims 1 to 15, characterized in that the cassette-like insert modules equipped with Luftabsaugstrukturen. Boom according to at least one of the claims 1 to 16, characterized in that the suction of the ABS air one or both sides via a motor-driven throttle device he follows. Boom according to at least one of the claims 1 to 17, characterized in that in the region of the boom Air ducts are provided to the cassette-like insert modules can be coupled. Boom according to at least one of the claims 1 to 18, characterized in that the assembly of the cassette-type insert modules is variable. Jib according to at least one of claims 1 to 19, characterized in that the cassette-like insert modules are designed as inserts which can be pulled in from the side region of the jib or pulled out therefrom are.