Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
  • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
  • B41F23/0403—Drying webs
  • B41F23/0423—Drying webs by convection
  • B41F23/0426—Drying webs by convection using heated air
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
  • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes

Definitions

• the invention relates to a blower unit for drying a printing material provided with printing ink in a printing press according to the preamble of claim 1 and to a method for producing a blower unit according to the preamble of claim 12.
• blower units are usually components of dryers, which serve to dry freshly printed substrate.
• the printing material is subjected to this with heated air so that the solvent present in the ink, which is still moist, evaporates more rapidly.
• a printing press is usually equipped with a plurality of such dryers. In the transport direction of the printing material is behind each printing unit at least one such dryer.
• Such a dryer therefore comprises at least one air supply unit which generates heated air.
• air supply unit which generates heated air.
• other suitable gases can be used instead of the air.
• the heated air is forwarded via a Leitu ⁇ gs- and optionally distribution system to blower units.
• These fan units serve to distribute the air supplied to them evenly over the entire width of the printing material.
• the elongate blower units are aligned in their axial direction substantially transversely to the transport direction of the printing material.
• the blower unit has, preferably at one of its end faces, a feed opening to which the air-supplying line can be connected.
• the opposite end face of the blower unit can be closed.
• the body of such a blower unit comprises a hollow body, wherein this can have any cross-section.
• this hollow body is limited by the outer surface of the blower unit.
• This hollow body serves as an air-conducting channel.
• the blower unit has a plurality of openings through which the air is passed onto the printing material. The openings are mounted so that the air reaches the substrate by the shortest route. These openings can be introduced in the form of holes in the hollow body. In general, however, these are introduced into the hollow body recesses, such as punched.
• a known fan unit is usually made of several sheets. To shape the hollow body, a corresponding sheet is folded. The openings are introduced into a second, in length substantially corresponding to the first metal sheet, which is then connected to the first plate in a suitable manner. For cost reasons, this is often a riveted joint. The front ends are obtained from other sheets, which also receive folds, which are then slipped over the end portions of the hollow body. The overlapping areas are then also riveted.
• Object of the present invention is therefore to propose a blower unit and a manufacturing method, so that the blower unit can be produced more cheaply.
• the blower unit contains extruded, deep-drawn or cast material.
• blower units may be manufactured by cutting the corresponding extruded profile to the length needed for the blower units.
• Another Machining, in particular a mechanical shaping can be dispensed with.
• the cross-sectional profile of the blower units can be changed according to the requirements. For example, it is possible to choose a profile that causes a uniform flow of air within the fan unit. Another advantage of such fan units is the efficiency during operation.
• the extruded, deep-drawn or cast material at least partially comprises the air duct.
• the extruded, deep-drawn or cast material comprises the Heilka ⁇ al together with at least one perforated strip, in which at least a part of the openings are introduced.
• the perforated strip therefore limits parts of the air duct and can likewise consist of extruded, deep-drawn or cast material.
• the perforated strip may be made of other material and / or manufactured independently and later with the material, which limit other parts of the air duct, are connected.
• the extruded, deep-drawn or cast material comprises the air duct entirely, whereby the production of a perforated strip is no longer necessary.
• the openings can then be made for example by introducing holes.
• the blower unit then consists of a single hollow body.
• a fan unit containing extruded aluminum.
• a blower unit may be more stable or lighter with equal weight compared to prior art blower units.
• the perforated strip in which the openings through which the gaseous medium exits the blower unit, at least partially plastic. It must therefore not be introduced into the air duct, the openings from which the air is directed in the direction of the printing material.
• Such a perforated strip can be connected in the simplest possible way with the air duct. This can be done by a screw.
• the fan unit can also have two mutually facing grooves, in which a correspondingly shaped hole bar can be inserted in the axial direction of the air channel.
• a perforated strip may be an arbitrarily shaped component and may have openings that have different contours.
• the openings may be circular or oval. However, slots are advantageous. Also, a nozzle-shaped configuration of the openings is conceivable.
• the feed openings of the blower unit can be connected to a connecting piece, which is separate
• Component is executed. An according to the profile of the blower unit or the
• Air duct formed, separate component needs only on the front side of the
• Connecting piece also has a, preferably circular, nozzle on its side facing away from the fan unit on which the gaseous
• connection piece comprises a plastic molded part.
• a plastic molded part can also be produced very inexpensively.
• a flow-guiding element is arranged inside the air channel in the flow direction of the gaseous medium immediately behind the connecting piece.
• the invention further comprises a method for producing a blower unit.
• material is used to make the blower unit whose final shape has been defined in a forming process at at least 100 degrees Celsius.
• a shaping element for example a casting mold
• this is a temperature in the range, usually slightly below, the melting temperature
• a temperature above the melting point is required if a casting method is provided as a forming process
• Plastics are often referred not to the melting or crystallization temperature, but to the so-called frost line, which indicates a temperature above which the plastic is malleable which process they are reshaped, must be heated at least to 100 degrees Celsius.
• FIG. 1 section through a blower unit according to the invention in the
• FIG. 2 shows a view according to H-II in FIG. 1
• FIG. 3 shows a view according to III-III in FIG. 1
• FIG. 4 Perspective view of a blower unit according to the invention.
• FIG. 1 shows a blower unit 1.
• This blower unit 1 is supplied with a gaseous medium, preferably heated air, via the connecting piece 2 in the transporting direction z. This gaseous medium then exits the blower unit 1 in the direction y through the openings 3.
• the blower unit 1 consists essentially of four components. In detail, these are the hollow body 4, the connecting piece 2, the end cover 5 and the hole or nozzle bar 6.
• a flow guide 7 In fixed connection with the connecting piece 2 is a flow guide 7.
• the connecting piece 2 and the flow guide 7 can be used as a component, advantageously as a plastic molding be executed.
• the flow guiding element 7 deflects a part of the medium flowing into the blower unit through the connecting piece, so that the flowing medium is also applied to the openings 3 located in the transporting direction z directly behind the connecting piece. Without the flow-guiding element, too little a proportion of the medium would escape through the first openings 3. In the end, the paint applied to the substrate would dry unevenly.
• the end cover 5 may be formed as a single molded part. In the illustrated embodiment, however, the end cover 5 consists of two molded parts, wherein the molded part 8 is attached from the inside to the end cover 5.
• the molded part 8 has a pin 9 which extends through a hole in the end cover 5 to the outside.
• the pin 9 is cylindrical.
• the pin 9 serves to support the entire blower unit 1 on a base, for example in the machine frame. Pin 9 and the connecting piece 2 are advantageously arranged so that their axes are aligned.
• the second, provided with the connecting piece 2 end of the blower unit 1 is supported by a to be connected to the connecting piece 2 piece of pipe. Overall, the fan unit can be rotated due to this type of storage, so that the openings 3 can be made easily accessible for cleaning.
• FIG. 2 shows the section II - II according to FIG. 1.
• 10 denotes a part of the surface of the hollow body 4.
• This part 10 has at its edge regions only a very small material thickness, so that the part of the surface 10 can be broken out.
• the nozzle bar 6 is connected to the hollow body 4.
• the hollow body 4 grooves or guides 11.
• the nozzle bar 6 has at its edge regions 12 complementary profiles. For assembly, therefore, the nozzle bar 6 only needs to be inserted from one end face into the grooves or guides 11 of the hollow body 4.
• FIG. 3 shows the view of an end face of the blower unit 1 according to section III - III in Figure 1. This end face is closed with the end cover 5. This end cover is fixed with screws 13 on the hollow body 4. To recognize is still the pin 9th
• FIG. 4 shows a perspective view of the blower unit 1, consisting of the hollow body 4, the connecting piece 2 and the nozzle bar. 6

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Detail Structures Of Washing Machines And Dryers (AREA)
• Drying Of Solid Materials (AREA)
• Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
• Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
• Duct Arrangements (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=35614715

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Family Cites Families (6)

• 2004
  • 2004-10-25 DE DE102004051990A patent/DE102004051990B4/de not_active Expired - Fee Related
• 2005
  • 2005-10-12 DE DE502005003590T patent/DE502005003590D1/de active Active
  • 2005-10-12 EP EP05796360A patent/EP1807264B1/fr active Active
  • 2005-10-12 WO PCT/EP2005/011013 patent/WO2006045442A1/fr active IP Right Grant
  • 2005-10-12 ES ES05796360T patent/ES2302238T3/es active Active
  • 2005-10-12 AT AT05796360T patent/ATE391017T1/de not_active IP Right Cessation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events