Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F15/00—Screen printers
  • B41F15/14—Details
  • B41F15/40—Inking units
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
  • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
  • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
  • B05C1/10—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the liquid or other fluent material being supplied from inside the roller
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
  • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
  • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
  • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
  • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
  • B05C5/0254—Coating heads with slot-shaped outlet

Definitions

• Device for supplying a substance to an application point Method for supplying substance and for cleaning the device
• the invention relates to a device for supplying a flowable, pasty and / or gaseous substance to an application point extending over the length of the device and for applying the substance to an application area which extends broadly along the application point. It also relates to methods for applying and cleaning the device.
• Branch channels are pipes that are connected to one another via openings.
• a covered body provided with channels on its outer surfaces is also known, or a channel body is composed of two or more plates into which flow channels are incorporated.
• These devices comprise substance introduction tubes which are guided over the actual channel body and / or placed thereon and which are connected, for example, via a pipe elbow to a passage which is guided outwards in the longitudinal center of the body.
• the channels end in a large number of outlet openings, which are provided to be divided at equal intervals across the application width.
• the feed pipeline which is inseparably connected to the channel body, results in a high weight of the device with usual working widths of several meters.
• the overall cross section of the device is relatively large, the device also having other machine parts such as a doctor blade device and a carrying beam is connected.
• the entire device is very space-consuming and in many cases cannot be used or can only be used with considerable conversion and handling difficulties in the narrow installation space, for example in a printing screen cylinder (round stencil), of an application / printing machine.
• the use of the duct branching system desired per se must therefore be dispensed with in many cases for reasons of space constriction, the relatively high weight and / or the handling difficulties.
• the substance outlet openings open directly into a relatively large-volume substance collecting space, or the outlet openings end directly in an application slot, the edges of which lie against a stencil, the substance emerging under pressure, which occurs sealing, which is very complicated to accomplish.
• These measures have hitherto been regarded as necessary in order to compensate for the discrete outflows at the outlet openings as far as possible, ie in order to influence the effect of the strip-like or punctual flow pattern caused by the outlet openings on the substance at the outlet Order to reduce. It is also considered necessary to operate the outlet openings for producing a pressure build-up in the feed device by contact or proximity contact with a surface to be acted upon.
• a main aim of the invention is to create a device which substantially improves the supply and application of substance in technical, economic and ecological terms for uniform application processes of all kinds, but in particular for applications on moving webs without or with the use of a screen cylinder template .
• the operation, the cleaning options and the upgrade / disassembly are to be optimized.
• the device according to the invention is characterized in particular by the fact that the device comprises a flow channel body which extends in length and has a body opening on the end face for releasable connection to a connecting line, Starting from the forehead body opening and extending into the region of the longitudinal center of the body, a connecting flow channel which continues the connecting line or is at least partially formed by the connecting line is formed, which leads the substance in a collecting flow between the front side and the longitudinal center of the channel body within the same , the connecting flow channel in the body longitudinal center is connected to a first substance flow dividing mouth of a substance flow dividing channel system which ends in a plurality of outlet openings, and the outlet openings in one with a nozzle-like slide provided with a wide-gap flow channel extending in the length of the device, which forms a homogeneous substance layer of a third flow stage and which is conveyed through the nozzle-like slot opening to an application site.
• the cleaning operation is carried out after the application operation in the upgraded state of the device, during which The application substance is dispensed by means of the wide-gap flow channel in a flow state that is homogeneous over the application width and in the immediate vicinity of the working area of the doctor element in front of it, and the substance from the area of the application zone is at least partially removed after the application operation withdrawn through the wide-gap slot opening in the form of a homogeneous substance layer through the wide-gap flow channel under the effect of a suction force applied to the connecting flow channel and by means of the channel system
• Flow channel dividing device is converted into a summarized (concentrated) substance discharge flow.
• a method according to the invention for the application and cleaning operation of the device in which the slot opening of the wide-gap flow channel extends in the area of an application zone in front of a doctor element, also consists in the cleaning operation following the application operation in the upgraded state of the application device is carried out, the application substance being dispensed by means of the wide gap flow channel during the application operation in a flow state which is flat over the application width and being dispensed in front of the doctor element in the vicinity of the working area, cleaning liquid as substance for the cleaning operation fed into the connecting flow duct, by means of the wide-gap flow duct in the immediate vicinity of the working area of the doctor element and fed to the same as well as the application surface and, if applicable, a template arranged in between, and with application Residual substance is mixed, the mixture then preferably being drawn off through the wide-gap flow channel under the action of a suction force applied to the connecting flow channel and by means of the channel system of the flow channel dividing device into a combined or closed (concentrated) substance
• connection flow channel is provided with a need-adjusted sub-quantity by means of a control device as a function of the substance level in the application area, which is measured by means of at least one substance contact level sensor connected to the control device fed.
• the wide-gap flow channel according to the invention is to be understood as one that is dimensioned by means of gap wall surfaces that are parallel and closely spaced, starting from a small gap thickness with a narrowing flow cross-section and / or possibly to the nozzle-like slot opening slightly narrowing towards each other, in combination with the nozzle-like mouth formed additionally at the gap outlet slot, the substance flows from the outlet openings into a homogeneous flow layer in the manner of a uniformly coherent substance film or substance "curtain". It is important according to the invention that the nozzle-like slot opening conveys the substance to the application site, which is preferably only slightly spaced from the slot opening, without the slot opening itself exerting a pressure-building doctor function or coming into contact with an application surface or stencil .
• the device is particularly easy to handle, to the smallest possible extent Space can be arranged and can be connected to connecting lines for different substance conveying or suction devices.
• the device is equipped with the connection flow duct according to the invention, which forms an integral part of the duct body, the detachable connection being made exclusively from the end face of the duct body. All substance flow dividing channels including the connecting flow channel forming a first substance flow dividing channel and all substance flow
• Partition openings are formed in the channel body.
• the device can be accommodated with a wide variety of doctor elements in narrow assembly spaces on application machines, in particular in circular templates of rotary printing machines.
• the wide-gap flow channel according to the invention with its nozzle-like slot opening and the design of the connecting flow channel nevertheless allow a high flow rate, so that even highly viscous application substances can be conveyed as far as possible with the lowest possible pressure build-up. This achieves a consumption-adapted conveyance and also that it is possible to work with the smallest possible amount of substance in the area directly in front of the application element.
• a particularly advantageous embodiment of the invention consists in that the channel body is formed at least in two parts with body parts that can be joined together in a releasable clamping and / or plug connection.
• the device In connection with the connecting flow channel according to the invention, which is advantageously provided for the insertable section of a connecting line, the device is not only extremely easy to disassemble or upgrade, but the channel body can be conveniently cleaned with the clamp / plug connection for the purpose of general cleaning disassemble and assemble.
• a major advantage of the device according to the invention is its suitability for all very different working / application widths that occur in practice.
• widths of approximately 1.2 to 3.2 m are common practice, for carpet finishing one works with widths of approximately 2 to 5 m, and geotextiles are available in widths of up to 8 m, but also up to 10 to 12 m manufactured.
• the device according to the invention is suitable for each of the application ranges mentioned and also for every performance requirement, that is to say for every quantity of substance output and for every quality requirement with regard to the uniformity of width and area.
• a particularly advantageous embodiment of the invention also consists in that on the side of the channel body facing the application surface (working surface) in the area of the application point or the doctor element, a tunnel-like arched, extending over the working width, to the application surface or possibly to An open space is formed in a template, in the front boundary wall of which, viewed in the direction of movement of the work, the wide-gap flow channel ends with the slot opening.
• a defined, very advantageously precisely (level) controllable, preferably particularly small amount of substance can be kept available in such a space between the front longitudinal boundary wall and a doctor element, and on the other hand the space with its directly above the doctor element serves itself extending curvature to also rinse the doctor element particularly intimately with cleaning liquid emerging from the slot opening.
• the cleaning liquid mixture is accumulated in the room, so that it can be drawn off particularly effectively in the form of a flat film through the wide-gap slot opening.
• the substance flow dividing channels arranged downstream of the central substance flow division mouth and all the division openings in a body circumferential angle range of at least 270 ° a connecting flow channel forming a first substance flow dividing channel are arranged.
• the connecting flow channel emanating from the channel body end face is incorporated and integrated into the body material in such a way that, relative to the body cross section, largely narrow walls are formed between all channels.
• Such a channel body is largely hollow and thus trained with optimal use of the body cross section for the duct system.
• the dimensioning of the wide-gap flow channel in connection with the easily flow-permeable channel system is of particular importance for the constant supply of substance and uniform distribution of area at the wide-slot slot opening.
• the gap dimensioning can be achieved particularly easily and in fine coordination by interchangeable attachment parts which can be attached to a longitudinal wall extending in front of the application point, as viewed in the direction of movement of the work, preferably transverse to it Slidable to the application surface and / or fastened with easily insertable spacer elements that determine the width of the wide gap.
• Quantity control as a result of the substance level in front of the application point is a very advantageous embodiment of the invention, the substance in front of the application point by means of a passage gap between a longitudinal front wall and the work surface (application surface / template) against the work movement direction by the Bring the width spacing gap up to the area in front of the boundary wall, which is preferably provided with a stowage profile. It is particularly expedient in the area of the spacing gap and / or in front of the boundary wall to position the substance contact probe with a position that can be changed and adjustable probe or probe tip. By forming an application substance supply expediently into the area in front of the front boundary wall, a coating application operation can also be provided.
• the device with the substance guide, • against the working direction can be very effective up to the area in front of the front boundary wall for cleaning the work surface and, if necessary, a (round) template running over it use.
• the device according to the invention can be used in a suitably integral connection with a wide variety of doctor elements and application devices.
• the flow stages of the device according to the invention can be operated for the substance supply with the lowest possible substance delivery pressure, so that a consumption-adapted, economical and ecologically advantageous substance supply is achieved.
• a delivery pressure in the range of one bar and even below is sufficient.
• a disruptive pressure build-up, pressure switch-on surges, pressure peaks and / or irregularities, which traditionally impair the substance width distribution, are avoided.
• FIG. 1 shows a feed and application device according to the invention in profile cross section
• 3a shows a partial longitudinal cross section through the channel body of the device according to FIG. 3, 3b in profile cross-section designs of Rakeleinrich- and 3c lines of a device according to FIG. 3,
• Fig. 7 shows a feed and application device according to the invention in profile cross section.
• FIG. 1 shows an application station of an application machine with a device according to the invention for supplying and applying a substance 90 such as paint or the like. on an application surface 81, e.g. a web of goods.
• the device 1 comprises a P-shaped profile hollow body forming a jacket / support body 2, which extends in the device length over the application width of the web 81. This is moved in the horizontal direction in the working movement direction B, being brought tangentially to a contact surface 82 formed by a support roller.
• a magnetic device 84 in the form of a magnetic bar 83 which extends across the application width, is arranged beneath the support surface 82, with which a squeegee blade 91 of a squeegee device 9, represented by the detail figure 1b, can be pressed against the web 81 with its squeegee edge.
• the Rakel ⁇ device 9 includes one with a sliding mount for the Doctor bar 91 provided holding part 222 which is fastened to the foot part of the P-support body by means of a screw connection.
• the support body 2 has a square tubular profile which forms the jacket body for a flow channel body 3 which is inserted therein in a form-fitting manner and which extends over the application width.
• an integrated connecting flow channel 4 is formed in the casing body 2 in the area of the P-head corner. This starts from a body opening on the end face of the channel body 3 and extends into the area of the longitudinal center of the body. There it is connected via a central substance flow dividing mouth K "0" -1 to a dividing channel system arranged around the flow channel 45.
• connection channel 45 has a connection section with a circular cross-section, into which a substance supply pipe 5 (flow stage I) is inserted from the front side of the body in a form-fitting manner and in a fixed connection.
• the connection channel at 51 merges into a square channel cross section.
• connection duct 45 ⁇ which is square in flow cross section, forms the first flow stage K “0" of the dividing duct system (flow stage II).
• the substance flow division channels of steps K1 to K8 are provided in the channel body 3 from its longitudinal surfaces. All substance flow dividing channels, including the connecting flow channel 45, are provided with the reference symbol 4.
• the channels multiply from stage to stage via associated division openings between the stages.
• the dividing openings are provided at equal intervals over the length of the channel body, and the channels extend along the channel body 3.
• the direction of flow of the application substance from 40 is the open face of the connecting channel 45 to the opening of the partition K ".
• the reference numerals 41, 42 and 43 denote the direction of flow through the further dividing orifices.
• the substance also in the opposite direction of flow, is discharged according to the duct cross-section in a combined, collected, concentrated flow stream moved out of or possibly into the connecting line 5.
• the foot of the P-support body is formed by a double wall 21, 22.
• the flat cavity of this double wall forms a wide-gap flow channel 7 (flow stage III), the gap thickness (internal spacing of the walls) is in the order of magnitude of the opening cross section of the outlet openings or smaller than this opening cross section.
• the outlet openings open into the wide gap channel 7 via a gap-like transverse channel 6, which extends over the application width, the latter Gap thickness in the x dimension is of the order of the cross section of the outlet openings and its extension in the y dimension is only a fraction of the flow length of the wide gap flow channel.
• the slot of the wide-gap flow channel 46 which is open towards the web 81 forms a slot opening 72 in the form of a nozzle slot at the wall edges 210, 220 of the double wall 21, 22 facing the web 81 due to the upstream and low gap thickness of the wide gap channel. 22 at a fixed distance from the web 81, which ensures that substance 90 passes against the working direction B into the area in front of the double wall 21, 22.
• the double wall 21, 22 forms, seen in the working direction B, a front longitudinal wall of the device 1.
• the wall edges 210, 220 are directed obliquely in the profile cross section, in such a way that the substance passage gap widens towards the working direction B.
• the device 1 is arranged in a coating machine with a fixed, but preferably adjustable, distance between the wall edges 210, 220 and the web 81.
• a measure which is particularly advantageous according to the invention is that the amount of substance in front of the squeegee strip 91 can be controlled by means of a substance contact sensor 21.10.
• the substance contact sensor 21.10 viewed in the working direction B, is arranged in front of the longitudinal wall 21 and attached to it.
• the substance level in front of the wall 21 is set and kept constant by the contact sensor controlling the amount of the substance introduced into the connecting flow channel 45 via an automatic control device 200.
• the control device 200 controls the delivery rate of a substance delivery device 201 connected to the connecting line 5 and provided with a substance storage container.
• the device 1 according to FIG. 1 has the particular advantage that it can be cleaned in an upgraded state, including the application point.
• the S zunowns ubstanz 90 at the application site on the Breitspal S trömungskanal 7 and by the sharing system by means of a voltage applied to the A nschlußströmungskanal 45 ABG suction force sucks.
• a cleaning liquid such as water or the like. fed in and distributed through the wide-gap slot opening 72, whereby substance residues are loosened.
• This cleaning is preferably carried out while the machine is running.
• the web 81a lies on a conveyor belt which holds the cleaning liquid at the application point when the web is removed.
• Cleaning mode even when it is particularly advantageous to control the influx of, for cleaning liquid to limit the amount of S u b punched-level control by means of which the contact sensor 21:10 for use, and.
• the contact sensor 21:10 for use
• a gas such as in particular air into the connecting flow channel in order to dry the parts of the device, including the application point, before the subsequent application operation.
• the double wall 21, 22 forms a doctor device 9, the elongated walls 21 and 22 a slot nozzle Form splitting knife 92.
• a fixed distance gap 220 is set for a thick coating.
• the free edges of the walls 21, 22 are directed obliquely to the slot opening 72. It is important that the substance exit gege the working direction B occurs before the orifice 72 and the amount of the feeding means gesteue uftragungs Chemistry on the wall 21 in the region of the A contact sensor arranged 21.10.
• a holding strip 223 for a magnetizable roller doctor 93 is fastened to the wall 22 by means of a holding part 22. It is particularly expedient to use a holding magnet for the doctor blade 93 in the holding strip 223. The doctor blade 93 lies sealingly against the holding strip 223.
• Fig. Le shows a doctor device 9 having a parallel to the double / cavity wall 21, 22 extending, in A rbeitscardi B considered rear longitudinal wall 230, as shown in Fig. 1, by a to the shell-Tragkö per 2 attached wall 23 is formed.
• the magnetizable squeegee 93 as seen in working direction B, lies against the wall 230 in a sealing manner.
• the application substance supply is located in the space between the wall 22 and the doctor blade 93.
• a substance contact sensor 22.10 is arranged on the wall 22 in the area of the application zone for level / quantity control of the substance.
• the wall 230 is provided in the area of the doctor blade 93 with a magnetic wall element 231 on which the doctor blade 93 is held when the magnet device 84 is switched off.
• a squeegee device 9 comprises a magnetizable roller doctor blade 93, which is placed over the application slurry extending holding / swiveling profile bar 931 is used, provided with a stowage profile.
• a swivel joint 932 is arranged on the swivel profile bar 931 in order to swivel it with a holding and control part 933 articulated thereon, for example in the form of a lever or arm, about the doctor blade 93.
• the other end of the holding and control part 933 is connected to a pivot joint 225 of a joint holding part 224, which is fastened to the wall 22.
• the pivoting position of the strip 931 and, at the same time, the distance between the slot opening 72 and the application surface 81 can be changed by adjusting and raising the device 1 and thus the double wall 21, 22.
• the upper spatial end position of the double wall 21, 22 is denoted by 11 and the lower end position (shown in dashed lines) by 12.
• the doctor devices 9 according to FIGS. 1d to 1f are advantageously arranged in a circular template 85.
• the circular template 85 can be cleaned particularly effectively. Cleaning fluid flowing out of the slot opening 72 is also flushed against the working direction B through the pores of the template and, if necessary, is sucked out of the area in front of or outside of the template 85 through the wide-gap channel 7 in suction operation.
• the support and jacket body 2 of the device 1 is specially designed. He has a B-like profile with two cavities walled on the long side.
• the wall 22 of the double wall 21, 22 facing the application point is formed by the elongated front wall of the upper rectangular square profile.
• the rear longitudinal wall 23, seen in working direction B, is an extension of the upper square profile.
• a cavity stiffening the device is formed under the upper square profile and between the walls 22 and 23, this cavity being closed off from the application surface 81 by a wall bridge or transverse wall 24 connecting the walls 22, 23 and extending over the application width.
• the transverse wall 24 delimits a tunnel-shaped space which is open to the application surface 81, and is concavely curved in the vicinity of a roller doctor 93 which extends longitudinally in the space.
• the rounded lower end 220 of the wall 22 merges at an acute angle into a straight, obliquely upward section 243 of the transverse wall 24. Section 243 is followed by a web /
• Bridge section that merges into a rear bulge section 242 directed toward the application surface 81.
• a receptacle which extends over the application width and into which a holding strip 231 for the doctor roller 93 is inserted in a captive manner from the end face of the device 1.
• the captive sliding connection comprises projections 26 which engage in the longitudinal grooves of the bar 231.
• the holding strip 231 which ends in the vicinity of the application surface 81 at a fixed distance, forms the rear wall of the tunnel-shaped space, as seen in working direction B. It is expediently equipped with a holding magnet for the magnetizable roller doctor 93.
• the double / hollow wall 21, 22 forming the wide gap channel 7 formed in two parts.
• the front longitudinal wall as seen in the direction of movement B, is provided by a shoulder wall which can be releasably attached to the upper profile of the support / casing body 2 by means of screw connection 2 + 21.
• the wide gap channel 7 is formed between the latter and the wall 22.
• the shoulder wall 21 is provided with a profile at its lower end 210 facing the application surface 81. Viewed in working direction B, this forms a profile outer surface directed obliquely to the application surface 81.
• the lower edge of the wall 21 is provided with a shape or cross-section of the surface or shape defining the wide-slot slot opening 72.
• 2 is provided in the region of the convex edge 220 of the wall 22 with a rounded concave surface which is shaped in such a way that the slot opening 72 narrows somewhat compared to the thickness of the wide gap channel 7 and the slot opening 72 from is directed obliquely upwards into the tunnel-like space.
• the gap thickness of the wide gap channel 7 is advantageously by means of spacer strips 29 or the like. when producing the screw connection 2 + 21 selectable and adjustable.
• the row of outlet openings 44 is provided in the lower left corner of the channel body 3 as in FIG. 1.
• the immediate opening into the wide gap channel 7 takes place vertically through the wall 22, so that a particularly simple connection of the extension wall 21 to the casing body 2, in particular using spacer strips 29 or the like. is reached.
• the division system comprises stages K “0" to K8. 2, however, the connecting flow channel (step K “0") is formed in the area of the channel body 3 facing the application surface 81.
• the levels are above level K “0" K1 and K2 are arranged, and the stages K3 to K8 follow from top to bottom in the y dimension of the channel body 3.
• a particularly advantageous design of the device 1 according to FIG. 2 is that the channel body 3 is inserted into the square jacket profile in a releasable plug-and-clamp connection.
• the jacket body 2 forms a body part of the channel body 3.
• two flat-shaped pneumatic pressing elements 31 are arranged, which at least over most of the Extend channel body length and lie in flat receptacles on the longitudinal sides of the channel body.
• the pressing elements 31 are formed by inflatable, tubular or pillow-like elements. When the pressing elements 31 are pressurized with air or the like.
• the channel body 3 is connected in a clamp / press-fit connection to the jacket body 2, while it can be loosely removed from the jacket body 2 in the case of pressureless pressing elements 31 and likewise inserted or inserted therein.
• the press connection is such that open channels to the inner surface of the jacket are covered substance-tight.
• a substance contact sensor 24.10 is provided, which is arranged in the cavity between the walls 22 and 23 and protrudes with its measuring tip into the tunnel-like space in an area between the apex of the doctor blade 93 and the slot opening 72.
• the position of the measuring tip at a distance from the application surface 81 can, as is expedient, be changed and adjusted in all substance contact sensors provided according to the invention.
• the contact sensor 24.10 is provided in addition to a substance contact sensor 21.11 at the end 210 of the extension element 21. Sensors 21.11 and 24.10 can be activated optionally for quantity / level control.
• FIGS. 2a to 2f Exemplary embodiments are shown in FIGS. 2a to 2f.
• the embodiment according to FIG. 2a is the same as that in FIG. 2.
• the end 210 of the wall 21 at the slot opening has an edge (L2) perpendicular to the application surface 81.
• the edge (L3) at the slot opening 72 jumps back somewhat against the working direction B, a homogeneous surface inflow of the substance in the direction of the doctor blade 93 taking place both in FIG. 2b and in FIG. 2c.
• FIGS. 1 the edge (L3) at the slot opening 72 jumps back somewhat against the working direction B, a homogeneous surface inflow of the substance in the direction of the doctor blade 93 taking place both in FIG. 2b and in FIG. 2c.
• the outflow from the slot opening 72 is essentially directed toward the round stencil 85 or the application surface 81. 2f there is the peculiarity that the wall 22 protrudes downward, towards the application surface 81, with a nose-shaped edge, so that as a result of this wall projection, an inflow delimits the doctor roller 93.
• the substance contact sensor 21.11 can be arranged on the profile of the extension wall 21 directly in the area in front of the slot opening 72. According to FIGS. 2d and 2e, between the slot opening 72 and the contact sensor 24.10, in contrast to the wall section 243 (FIG.
• the tun- A particularly defined substance space or area which can advantageously be extended up to the wall 21, the substance level being precisely adjustable and limited by means of a contact sensor, so that one or, if necessary, a plurality of interacting contact sensors arranged directly on the device provide an automatic, needs-based adjustment Quantity control of the substance which can be supplied by the device continuously, free of pressure surges and at the lowest pressure.
• each contact sensor is connected to a control device that controls a substance delivery device.
• the slot opening 72 can be widened in a funnel shape. This is particularly advantageous in order to distribute low-viscosity cleaning liquid from the mouth 72 and to draw it into the latter.
• a device 1 according to the invention according to FIG. 3 comprises a flat U-shaped jacket body 2.
• a channel body 3 is provided with Body parts 3A and 3B formed in two parts.
• the parts 3A and 3B form body halves placed flat against one another in the area of the dividing channel system in the x dimension. Starting from the channel level K "0" arranged in the upper part of the body, the channel system is provided with levels below in the x dimension (channels 1K to 128K). Channels 1K, 2K and 4K extend through the butt surface.
• the body part 3A is L-shaped in cross-section, as viewed against the direction of the z coordinate.
• the rectangular body part 3B complements the L body to the generally rectangular channel body 3, which is inserted into the U-jacket body 2 and is open to the application surface 81.
• a tunnel-like space is formed in the L-foot body of the body part 3A.
• the rear wall 231 is part of the L-shaped body.
• the front wall of the L-shaped body viewed in working direction B, forms an inner surface for the wide-gap flow channel 7 on its outside.
• the other wide-gap channel inner surface is formed by the lower wall 21 of the jacket body 2 and a curved edge molded onto it.
• the wide-gap channel 7 is designed with a narrowing region of curvature and the slot opening 72 directed obliquely upwards into the tunnel-like space.
• a contact sensor 24.11 or a plurality of such contact sensors S1, S2, S3 are arranged on the curved surface of the tunnel-like space which projects above the roller doctor blade 93. These protrude into the area in front of the roller doctor blade 93 with their sensing tips, which are preferably adjustable at a distance from the application surface.
• a special design of the wide gap channel 7 is that, in contrast to FIG. 2, the last flow channel stage engages in the wide gap channel 7.
• the two body parts 3A and 3B can expediently be put together by a quick-release screw connection.
• the two parts 3A and 3B in the U-jacket body 2 are inserted or inserted, plug-in / sliding strips or projections 26 are provided on the inner wall of the U-body and engage in associated longitudinal grooves on the body part 3a.
• the two-part channel body 3A, 3B is inserted into the U-jacket body 2 by means of a pneumatic press connection. Longitudinal grooves are formed on the body part 3A in the lower region of the device 1 on the side opposite the wall 21, into which tubular clamping / pressing elements 31 extending over the length of the device are inserted. These expand when a pressure medium such as compressed air or the like is applied.
• the pressing elements according to FIG. 3 as well as according to FIG. 2 can be provided with a valve, which is preferably exposed on one end face of the channel body, for the inlet / outlet of the pressure medium.
• the body parts 3A, 3B do not have to be connected to one another by means of a screw connection.
• the press connection is such that the body parts are connected to one another in a substance-tight manner at substance transition points between them.
• the connecting flow channel 45 (K “0") has a circular cross section in FIG. 3, wherein it is formed by channel halves of the body parts 3A and 3B symmetrical to the abutting surface.
• a feed pipe 5 can be expediently inserted through the channel 45 of the channel body 3, which is designed in such a way that the feed substance is guided from one end face into the longitudinal center of the channel body and there through the dividing mouth K "0" -1 with the two channels exhibiting
• Channel stage Kl is connected, as shown in Fig. 3a.
• the two channels of stage Kl each divide via a division opening Kl-2 into two channels of channel stage K2, which thus has four channels or division openings.
• the further channel stages K3 to K8 then follow in the same way, the channels along the channel body being arranged in series. are arranged side by side.
• the stage K8 comprises 128 channels which open directly into the wide gap channel 7 via 256 outlet openings.
• Such a channel multiplication with steps K "0" to K8 is also provided in the channel bodies according to FIGS. 1 and 2, and the multiplication takes place in the same way in FIGS. 4 to 7 to be described, the channel body in FIG. 4 Levels K “0" to K4, the channel body in FIG. 5 and 6 levels K “0" to K5 and the channel body in FIG. 7 levels K "0" to K6.
• FIG. 3b and 3c each show an advantageous embodiment of a doctor device integrally formed with the device 1 according to FIG. 3.
• retaining bolts 91. 11 are attached to the tunnel wall above the doctor element and directed toward the application surface 81, to which a magnetizable circular screed bar forming the doctor element is slidably attached.
• a bar 91.12 which is freely movable transversely to the application surface and into which an elastic doctor blade 91.14 is inserted is inserted in the tunnel-shaped space.
• a device 1 according to FIG. 4 with the division channel stages K "0" to K4 is provided in particular for smaller working widths.
• the support / casing body 2 has a P-shaped profile, with an extension wall element 21 being provided for forming the wide gap channel 7 similarly to FIG. 2, which is provided by means of screw connection 21 + 2 using a spacer strip 29 determining the width of the wide gap channel is attached to the casing body 2.
• 21 + 22 is in In the region of the lower section of the double wall 21, 22, a spacer sleeve corresponding to the width of the wide gap channel is used.
• the device is equipped with a stiffening hollow wall 232, shown in dashed lines, which is fastened on the side of the casing body 2 facing the application surface 81 and extends parallel to the application surface 81 with the double wall 21, 22.
• a tensioning device is arranged in the cavity of the stiffening wall 232. This comprises a tensioning tube 233 with an internal thread arranged perpendicular to the lower surface of the casing body 2, into which a tensioning screw 234 or 235 is screwed at each end of the tensioning tube. By turning the tensioning tube 233, the screws 234, 235 are tensioned against the cavity walls lying against the screw heads. With this device, the straightness of the casing body 2 can be adjusted over the application width.
• a holding strip 231 for the doctor blade 93 is advantageously fastened to the end of the stiffening wall 232 facing the application surface 81. Such a holding strip 231 has been described with reference to FIGS. Le and 2.
• a device 1 according to the invention according to FIG. 5 comprises a U-jacket body 2 open towards the working direction B.
• the web wall of the U-body 2 is, similar to FIG. 2, extended with a longitudinal wall 23 on which a holding strip 231 for a doctor blade 93 is attached.
• a channel body 3 is inserted into the casing body 2.
• a connecting line 5 is detachably connected to a channel section 52 via a connection receptacle on the end face of the channel body 3. This is in alignment with the central longitudinal axis of the channel body 2 and is open on the front side of the body.
• the section 52 merges into a channel section 54 via a channel section 53 which is oblique to the body central longitudinal axis.
• the latter is open on the long side of the body, so that it is covered by the wall of the casing body 2. It extends to the middle of the body, where it merges into the channel stage Kl via a dividing mouth.
• the channel sections 52 to 54 form the connecting flow channel integrated in the channel body 3.
• Channels from the following channel stages K2 to K5 are worked into the channel body 3 from the outer surface and covered by the jacket body 2.
• the channels of stage K5 open into outlet bores 70 which extend through the channel body 3 over the open area of the U-jacket body 2. These are open on the lower side of the channel body 3.
• a wide-gap flow channel 71 is formed there in the x dimension, the slot opening being directed toward the working direction B.
• the division channels downstream of the central division opening K "0" -1 and all division openings are arranged in a duct body circumferential angle range of at least 270 ° around the connecting flow duct 45 forming a first division duct.
• the wide gap channel 71 is relatively short. This is achieved by a corrugated structure on the wide gap channel surface opposite the outlet bores 70. As can be seen from FIG. 5b, a flat, strip-like wave strip 73 is inserted into the slot opening 72 for this purpose, which has a wave shape designated by 74. In this case, a channel wall corrugated surface is formed, with which the gap channel strength in the area of the outlet openings of the outlet bores 70 and towards the slot opening is somewhat reduced, while the width of the wide gap channel on the rear side of the wide gap channel with wavy cutouts in the areas between the outlet openings is somewhat larger. The wave surface structure is thereby formed.
• a discharge ante is formed at the mouth of the slot, through which the surface-homogeneous substance film 900 formed in the wave-wide gap channel runs and reaches the roller doctor blade 93. 5 can of course also be equipped with a doctor blade bar 91 or a doctor blade blade 91.15.
• the channel body 3 according to FIG. 5 has, for example, a cross-sectional dimension of 40 ⁇ 40 mm for a substance to be supplied over a width of approximately 2 m. With a channel body length of approx. 5 m, the cross-sectional dimensions are approx. 100 x 100 mm and are thus far below those of conventional devices.
• a channel body 3 inserted into a jacket body 2 according to FIG. 6 comprises graduation levels K "0" to K5, the flow channels of which are incorporated into the channel body 3 from the outer surfaces thereof.
• a dividing system is formed which overlaps with substance flow division channels and substance flow division openings. The division of the cross-section is such that the channel connections K2-3 from the stage K2 to the stage K3 penetrate the channel body 3 through the region of the body center from one side of the body to the other.
• the connecting flow channel is designed and arranged as in FIG. 5a, so that the dividing channels and all dividing outlets are provided in an extremely space-saving manner in a channel body circumferential angle range of at least 270 ° around the connecting flow channel forming a first dividing channel.
• a jacket body 2 in the form of a square profile with a channel body 3 inserted therein forms a first component.
• a second component forms a hollow body with the longitudinal walls 22 and 23, which is arranged under the casing body 2.
• a third component is provided on the underside of the hollow body, namely a bridge or tunnel body, which forms a tunnel-like space as in FIGS. 2 and 3.
• the rear wall forming a retaining strip 231 for the doctor roller 93 can be arranged separately on the bridge body, so that the device then comprises a fourth component.
• a fifth component represents an extension wall 21, as it is based on 2 and 4 has been described.
• connection points of the individual components are designated with 246, 247, 248 and possibly 249.
• the first, second and third component have the same dimensions in the x-dimension, so that a device that is relatively slender in the y-dimension is created.
• a clamping device as in FIG. 4 is expediently arranged in the hollow body forming the second component.
• the channel body 3 is in turn inserted into the jacket body 2 by means of a pneumatic pressing element 31.
• a connecting line 32 with a flat, rectangular cross section is provided, which is inserted into the channel body 3 along a connecting section and at the end of the connecting section merges into the connecting flow channel of stage K "0" with a circular cross section.
• the connecting pipe 32 is arranged in the upper region of the channel body 3.
• the flat-shaped pneumatic pressing element 31 is inserted between the upper wall of the casing body 2 and the upper flat wall of the connecting pipe 32.
• the channel body 3 is press-connected to the jacket body 2 via the pipe 32.
• the channel step K1 is arranged in the y dimension below the step K "0", with transversely oblique transitions between the step K1 and the step K2 being provided in the right corner region of the body in the drawing.
• the channel steps K4 to K6 are also in an oblique-angled connection arrangement, this arrangement corresponding to the inclined arrangement of the dividing steps in front of the outlet openings in FIGS. 1 and 2.
• the support / jacket bodies can significantly project beyond the readiness for application on both sides and can rest on the side of an application / printing machine in bearings or be held in holding / adjusting parts.
• the support / casing body 2 can have the same length as the channel body 3, the support / casing body then being fixed with support / holding parts projecting laterally outwards connected is. 3 and 5, that the connecting line in the form of a substance introduction tube is inserted through the entire length of the channel body 3 and serves as a support, holding and / or adjusting tube for the device .
• Devices according to the invention according to FIGS. 1, 2, 3 and 7 can also be installed and used in application / printing machines in other spatial arrangements.

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• 1993
  • 1993-02-12 DE DE9302207U patent/DE9302207U1/de not_active Expired - Lifetime
• 1994
  • 1994-02-12 EP EP94908302A patent/EP0683700B1/fr not_active Expired - Lifetime
  • 1994-02-12 WO PCT/EP1994/000419 patent/WO1994017927A2/fr active IP Right Grant
  • 1994-02-12 AT AT94908302T patent/ATE156039T1/de not_active IP Right Cessation
  • 1994-02-12 DE DE59403561T patent/DE59403561D1/de not_active Expired - Fee Related

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