Classifications

• • 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
  • B05C5/0266—Coating heads with slot-shaped outlet adjustable in length, e.g. for coating webs of different width
• • 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
  • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
  • B05C5/0275—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve
  • B05C5/0279—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve independently, e.g. individually, flow controlled

Definitions

• the invention relates to an actuating body for setting a working width of a metering gap in a device for applying flowable medium according to the preamble of claim 1.
• Such actuators are used in devices for the flowable application of a hot-melt adhesive to a material web.
• This device comprises a coating head with a slot nozzle arrangement in order to discharge the adhesive.
• a central distributor channel is provided in the coating head, through which the adhesive is supplied to a slot nozzle arrangement via a metering gap.
• at least one actuating body is provided in the distribution channel, which is rotatably arranged at least radially in the distribution channel. Slot holes are axially spaced apart in the actuating body. see which form a different size of the passage between the distribution channel and the metering gap depending on the rotation. In this way, the amount of adhesive that reaches the slot nozzle arrangement can be determined.
• This arrangement of a sealing ring for sealing the distribution channel and for rotatably receiving the actuating body in the distribution channel has the disadvantage that this sealing arrangement is subject to high wear due to the high temperatures of the hot-melt adhesive and also due to the actuating movements of the actuating body.
• the invention is therefore based on the object of proposing an actuating body in which a low-wear and tight arrangement and accommodation of an actuating body in a housing for applying flowable medium, in particular for adjusting the working width, is made possible.
• the arrangement of at least one sleeve section on the cylindrical hollow body, which is movably provided in a distribution channel of a device for discharging flowable medium, makes it possible for the sleeve section to achieve both a sealing and a sliding effect.
• the sleeve section surrounds the at least one passage in the cylindrical hollow body and lies directly against a wap of the distributor channel. This provides, on the one hand, support and guidance of the cylindrical hollow body in the distribution channel, and, on the other hand, a sealing arrangement is created since the sleeve section completely surrounds the passage which can be adjusted in one position.
• At least one sleeve section is attached to the cylindrical hollow body by a press fit.
• the sleeve section is preferably warmed up for positioning on the cylindrical hollow body, so that there is an expansion in diameter, around the sleeve section there is a simple application of the sleeve section to the cylindrical hollow body.
• This advantageous arrangement also has the advantage that there is an exchange of the sleeve section in the event of damage or wear.
• different sleeve sections can be applied to one and the same cylindrical hollow body, which are adapted, for example, to the different adhesive substances.
• the cylindrical hollow body has at least one knurled, embossed or longitudinally corrugated surface to increase the holding force. Due to the knurled surface, an enlarged surface can be achieved on the hollow cylinder, as a result of which a non-positive and positive connection is created after the at least one sleeve section has been applied and an interference fit has been achieved. The same applies to a longitudinally grooved surface.
• the longitudinally corrugated surface has the additional advantage that it is easier to push on the sleeve sections in the warmed-up state for assembly.
• a further advantageous embodiment of the invention there is at least one between a first and at least one further sleeve section.
• Ring section provided, which are formed in the outer diameter smaller than the one or more sleeve sections.
• an expansion joint is formed between at least one ring section and at least one sleeve section or between at least two subassemblies which are assigned to one another and which are formed by at least one sleeve section and a ring section.
• each sleeve section are made after the positioning of the at least one sleeve section on the hollow body. This will make production easier. A radial alignment of the sleeve sections to existing openings in the hollow body is not necessary. These are introduced together after the sleeve section has been applied. As a result, the openings can be precisely aligned and positioned in the actuating body.
• the longitudinal axes of the openings are preferably aligned eccentrically to the center of the hollow body.
• the passage provided first is preferably almost tangential to one. Arranged inside diameter of the cylindrical hollow body, so that a flow-favorable exit of the adhesive is made possible. If one or more further passages are arranged, these advantageously each border on the wall of the previous opening on, the longitudinal axis of which is formed such that the passages converge at least in the region of the wall thickness.
• the sleeve section is made of at least one sliding and sealable composite material.
• the proportions and structure of the composite material can be varied.
• a base substance made of Teflon which is enriched with bronze or the like.
• Other material combinations are possible, which are both heat-resistant, have good storage properties and also perform a sealing function.
• FIG. 1 shows a perspective view of a device for applying flowable medium
• Figure 2 is a schematic side view of an actuator according to the invention.
• FIG. 3 shows a schematic sectional illustration along the line II-II in FIG. 2.
• FIG. 1 a device 11 for applying a flowable medium to a material web, not shown, is shown in perspective.
• material web , ⁇ is to be understood in a broad sense. This can include both woven and non-woven structures. Likewise, these can be breathable materials as well as foils made of plastic or paper. In addition, the material web can already be be layered or pretreated or be a one-, two- or multi-layer composite of different components or coatings or materials. Furthermore, it can be provided that a single-layer or multi-layer material is applied with one or more coatings of the flowable medium in order, for example, to seal a material web or to provide it with a specific breathable layer.
• thermoplastic adhesives thermoplastic resins
• reactive adhesives such as, for example, POR
• high-performance adhesives high-performance adhesives and adhesives which have a softening point or a melting point of, for example, above 180 °
• further high or low viscous flowable fluids or media can be provided which can be applied hot and / or cold to the material web through the device
• the flowable medium can also have fibrous additives or other admixtures which can be processed by the device according to the invention.
• the device 11 is a so-called coating head, which has a nozzle arrangement 19, in particular a wide-slot nozzle arrangement.
• the device 11 consists of a first and second or upper and lower housing section 21, 22, the upper housing section 21 advantageously being removable along a parting plane 23 from the lower housing section 22, preferably for cleaning. Bores 24 are provided in the housing sections 21, 22, in which controllable heating elements are arranged.
• a feed channel 28 is provided, to which a pump unit 29 is connected.
• the flowable medium is supplied to the device 11 via this pump unit 29.
• the pump unit 29 can comprise metering pumps as well as a buffer tank, a melting unit or the like in order to provide the flowable medium in a suitable manner and to supply it to the feed channel 28.
• the feed channel 28 opens into a distributor channel 31, which preferably extends parallel to the slot nozzle arrangement 19 over the entire width of the housing section 21. From the distributor channel 31 lead supply channels 32 into a metering gap 34, which lies, for example, in the parting plane 23.
• a template 36 is arranged in the metering gap 34 and has segment-shaped channels 37. These segment-shaped channels 37 are, for example, cup-shaped, V-shaped or U-shaped.
• the supply channels 32 preferably open completely into the segment-shaped channels 37.
• the template 36 can be designed correspondingly in thickness and geometry in order to apply a desired mass of flowable medium.
• the template 36 is interchangeably arranged in the metering gap 34.
• the metering gap 34 has at its outer end an upper and lower discharge lip 38, 39 and forms a so-called squeezing surface and at the same time guides the web material tangentially along the outside thereof.
• valves 42 which are used to regulate the flow rate of the medium from the supply channel 32 into the segment-shaped channel 37.
• the valves 42 have an adjustable needle 43 with a conical or conical tip, which can be positioned in the supply channel 32.
• the variable setting of the valves 42 enables the same flow rate as the basic setting for all supply channels 32.
• these valves 42 can be used and can also be controlled by an additional connection and disconnection for adjusting a working width of a metering gap 34.
• An adjusting body 46 of an adjusting unit 47 is arranged in the distributor channel 31 and can be moved axially and / or radially in the distributor channel 31.
• the actuating body 46 is tubular and has an open end to the center of the nozzle arrangement 19.
• the actuating body is closed to the outer edge region of the housing section 21 by a closure element 48 or a closure plug.
• the actuator 46 is shown schematically. At a left end, a flange 51 and a receptacle 52 are provided, through which the actuating body 46 is interchangeably received and actuated via the adjusting unit 47. A bore is adjacent to the flange 51 53 is provided, which enables adjustment of the exact radial alignment of the actuating body 46 in the distribution channel 31 or the supply channels 32.
• a section immersed in the distribution channel 31 comprises a plurality of sleeve sections 54 and ring sections 56 which, according to the exemplary embodiment in FIG. 2, are arranged alternately on the cylindrical hollow body 58.
• the actuating body 46 has, associated with the outer housing section 22, a first sleeve section 54 which comprises a through bore 59 which forms a passage 61 between the distribution channel 31 or the interior of the hollow body 58 and a supply channel 32.
• a ring section 56 is provided adjacent to the first sleeve section 54. The outer diameter of this ring section 56 is smaller than the sleeve section 54.
• This ring section 56 is in turn followed by a second sleeve section 54 which, for example, comprises two through bores 59.
• the first through bore 59 of the second sleeve section 54 is arranged in a first radial position 66.
• the second through bore 59 of the second sleeve section 54 is arranged in a radial position 67.
• a third through bore 59 on the third sleeve section 54 is arranged at a third radial position 68, etc.
• the arrangement of the through bores 59 is shown, for example, in FIG. 3, which corresponds to a sectional illustration along the line II-II in FIG. 2.
• the first through-hole 59 extends essentially tangentially to the interior of the hollow body 58.
• the second through-hole 59 is arranged at an angle to the first through-hole 59, so that the holes within the wall thickness of the hollow body 38 at least partially cut or adjoin each other.
• the other through holes 59 provided are designed analogously.
• the sleeve section 54 is heated for positioning on the hollow body 58, so that the inside diameter of the sleeve section 54 is enlarged compared to the outside diameter of the hollow body 58. After cooling, the sleeve section 54 is preferably attached to the hollow body 58 via a press fit or a press fit.
• Knurling can be applied to the hollow body 58 to increase the adhesion between the sleeve section 54, the ring section 54 and / or the assembly 64 and the hollow body 58. Furthermore, a corrugation running along the longitudinal axis or a diamond-shaped corrugation or the like can be applied. It can also be provided that a heat-resistant adhesive is introduced between the sleeve section 54 and the hollow body 58 in order to secure the press fit.
• the sleeve section 54 is designed as an annular element which is at least slightly wider than the diameter of a through bore 59.
• the ring section 56 is also formed as a single element and can be fixed on the cylindrical hollow body 58 in analogy to the sleeve section 54.
• the ring section 56 essentially serves to space two sleeve sections 54 arranged relative to one another.
• the reduced outer diameter of the ring section 56 compared to that of the sleeve section 54 enables a reduction in the driving force due to a reduced friction surface.
• the at least one ring section 56 can optionally be provided between two sleeve sections 54.
• an assembly 64 is formed which comprises a plurality of sleeve sections 54 and ring sections 56.
• the assembly 64 is designed as a cylindrical body.
• the outer diameter of the sleeve sections 54 and the ring sections 56 as well as the width of the sleeve sections 54 and ring sections 56 can be fixed by turning.
• the width of the ring sections 56 is dependent on the spacing of the distribution channels 32 and the size of the distribution channels 32.
• the sleeve section 54 completely surrounds the through-hole 59, the through-hole 59 being made smaller or the same size as the diameter of the distribution channel 32.
• the outer diameter of the sleeve section 54 is adapted to the size of the distribution channel 31, so that rotation for adjusting the adjusting body 46 is made possible, but at the same time a sealing arrangement is provided between the through bore 51 and the wall section of the distribution channel 31 adjoining it.
• the through bores 59 are preferably made after the assembly 64 or the individual sleeve sections 54 and ring sections 56 and ring sections 56 arranged therebetween have been applied.
• a body which corresponds to an assembly 64 is inserted into the distribution channel 31.
• This body is inserted, for example, in a greatly cooled state into the distribution channel 31 and forms an interference fit with the distribution channel 31.
• the adjusting body 46 is designed as a hollow body 58 and is inserted and guided into the assembly 64 which is inserted and pressed into the distribution channel. The effect described above can thereby be achieved, according to which there is at least one drive with low frictional forces and through bore 59 in a non-use position tightly closes the passage or passages 61.

Landscapes

• Coating Apparatus (AREA)
• Paper (AREA)
• Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
• Stored Programmes (AREA)

Applications Claiming Priority (2)

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• 2003
  • 2003-09-02 DE DE10340768A patent/DE10340768A1/de not_active Withdrawn
• 2004
  • 2004-09-02 AT AT04764707T patent/ATE370798T1/de not_active IP Right Cessation
  • 2004-09-02 US US10/570,522 patent/US20060260540A1/en not_active Abandoned
  • 2004-09-02 DE DE502004004763T patent/DE502004004763D1/de not_active Expired - Fee Related
  • 2004-09-02 WO PCT/EP2004/009746 patent/WO2005023435A1/fr active IP Right Grant
  • 2004-09-02 EP EP04764707A patent/EP1663509B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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