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
  • 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
  • B05C1/0826—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 work being a web or sheets
  • B05C1/0834—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 work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
• • 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
  • B05C1/14—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 travelling band

Definitions

• the invention relates to a release agent application device for the press belt of a continuously operating press.
• Such a release agent application device in which an application roller is pressed against the press belt rotating over a deflection drum in order to transfer release agent to this press belt.
• the release agent is intended to prevent caking of the material to be pressed on the press belts of the continuously operating press forming a press nip.
• a continuously operating press has an upper and a lower endlessly rotating press belt, which are regularly designed as steel belts and are supported in the pressing area on roller bars covering heating plates, which ensure force and heat transfer to the material to be pressed.
• the release agent is sprayed onto the application roller via a distributor pipe.
• this coating device consists essentially of a doctor blade, a metering roller and an application roller. Chamber doctor, metering roller and applicator roller can be adjusted independently of one another (cf. DE 195 42 097 C2). Such developments had no influence on the design of release agent application devices.
• the application roller consists at least partially of magnetizable material, is arranged without an axle bearing, rolls on the Transfer roller and is movable relative to the application point (see. WO 87/01308).
• the invention has for its object to provide a release agent application device of the embodiment described above, with which a metered and consistently uniform release agent application can be achieved on the press belt in question, which is also environmentally friendly and does not interfere in terms of plant technology.
• the invention teaches a release agent application device for a press belt of a continuously operating press (rotating around deflection drums), with an application roller that can be set against the press belt (in the area of a deflection drum) and a metering roller that can be set against the application roller and that is immersed in a release agent bath, and with actuating units for variable adjustment of the metering roller against the application roller and the application roller against the press belt with pressing forces defined by the amount of the release agent to be applied to the press belt and with a control device for controlling or regulating the pressure forces depending on the amount of release agent required in each case.
• the release agent taken up by the metering roller is applied to the application roller by pressing the metering roller against the application roller with a defined pressing force.
• the application roller transfers the release agent to the press belt, which is regularly a steel belt or a wire belt.
• the amount of release agent applied depends on the roller contact surfaces between the metering roller and application roller as well as the application roller and press belt and consequently on the respective pressing force, so that the application of the release agent or the amount of release agent to be applied can also be varied by changing the pressing forces.
• the applicator roller preferably has a compressible backing layer, for example it is designed as an elastomer-coated roller in order to achieve optimal release agent transfer.
• the latter also applies to the metering roller, which is used as an anilox roller, e.g. B. surface-structured roller can be formed and thereby ensures a proper application of the release agent on the applicator roller.
• the screening of the anilox roller you can also influence the scooping amount.
• the invention further teaches that the pressing forces of the application roller and / or metering roller are determined by means of force measuring sensors, force measuring bolts, force measuring bearings or load cells and guided via measuring amplifiers and converted into digital or analog signals for the control or regulating device.
• the roller positions such. B. "Working position” and “maintenance position” of application roller and metering roller are expediently reported and monitored by means of initiators, pressure switches and / or limit switches.
• the invention further provides that the application roller and metering roller by means of cylinder piston assemblies z. B. Pneumatic cylinders as actuators in the different roller positions, z. B. are pivotable. For example, a pressure switch can signal whether the pneumatic pressure required for control is present.
• the position of the metering roller in relation to the application roller and the application roller on the press belt can be determined, for example, by an indirect measurement of the pressing forces.
• the roller bearing points can each be equipped with a load cell.
• the pressure forces are controlled via proportional valves, which regulate the pressure of the pneumatic cylinders.
• the controller takes a maximum value for the pressing forces into account. This maximum value is then communicated to the control system via an input restriction "pressing force metering roller left / right" / "pressing force application roller left / right”.
• the application roller and metering roller are according to the invention driven by servomotors in synchronism with each other and to the press belt in order to avoid premature wear or even damage to the roller surface.
• the application roller or work roller and the metering roller or their roller carrier are each pivotably mounted independently of one another on a base frame.
• the application roller is rotatably mounted on at least one application roller carrier which is pivotally mounted on a base frame and that the metering roller is rotatably mounted on at least one metering roller carrier which is pivotably mounted on the application roller carrier.
• the positions are, as it were, nested one inside the other, in particular in order to make the roller forces reproducible and independent of one another.
• an essential feature of the invention is the independent adjustment possibility of the two-sided applicator roller carriers for the applicator roller and possibly also the two-sided metering roller carriers for the metering roller, in order to be able to ensure precise delivery to the steel strip over its width in the tenths of a millimeter range. So that the bearings of the applicator roller and possibly also the metering roller do not track out when the force / displacement difference is too great, the two applicator roller carriers and possibly also the two metering roller carriers are connected to one another via a coupling, which allows this freedom, but limits it to a maximum. This can also be achieved with the aid of synchronous shafts or torsion shafts, taking into account a predetermined bearing play with spring loading.
• the invention proposes that the release agent bath be arranged in a release agent trough or also in a doctor blade chamber or chamber doctor blade.
• a chambered doctor blade system there is the option of placing the release agent bath either horizontally below the rollers Arrangement or to be provided at the side of the rollers in a quasi vertical arrangement.
• a separate release agent application device is assigned to both the upper press belt and the lower press belt of the continuously operating press, preferably in the inlet area.
• FIG. 1 shows a continuously working press in a schematic side view with release agent application devices in the inlet area
• FIG. 3 shows the object according to FIG. 1 in the working position of the metering roller and applicator roller
• FIG. 4 shows the subject of FIG. 3 in a modified embodiment
• Fig. 6 is a plan view of an applicator roller from Fig. 4 and
• Fig. 7 shows the subject of Fig. 3 in a further embodiment.
• the figures show a continuously operating press for producing wood-based panels with a release agent application device 1 for one of the two press belts 3 rotating over deflection drums 2.
• 1 shows only a release agent application device 1 for the upper press belt.
• a further release agent application device (not shown) can be provided for the lower press belt.
• the release agent application device 1 has a against the relevant press belt 1 z. B. in the region of an inlet-side deflection drum 2 applicator roller 4 and an adjustable against the applicator roller 4 and immersed in a release agent bath 5 metering roller 6.
• the release agent application device 1 has actuating units 7 for variably adjusting the metering roller 6 against the application roller 4 and the application roller 4 against the press belt 3, specifically with pressing forces defined by the amount of the release agent to be applied to the press belt.
• a control or regulating device is provided for controlling or regulating the pressing forces depending on the amount of release agent required in each case, which is not shown.
• the release agent bath 5 is shown in FIGS. 2 and 3 in an indicated release agent tray 8.
• the application roller 4 has a compressible carrier layer 9 and is designed as an elastomer-coated roller.
• the metering roller 6 is designed as a surface-structured anilox roller.
• the metering roller 6 is assigned a pre-metering doctor 10 and the application roller 4 a metering doctor 11, which is only indicated.
• the pressing forces of the application roller 4 and the metering roller 6 are determined according to the exemplary embodiment by means of force measuring sensors and guided via measuring amplifiers and converted into electrical signals for the control and regulating device.
• the "maintenance position" shown in Fig. 2 is also a "waiting position" for the case that the release agent application device is not needed, for. B. during production interruptions. To transition from the working position to the waiting position, it is expedient first to pivot the rollers 4 and 6 together from the press belt 3 and then to pivot the metering roller 6 away from the work roller 4.
• the application roller 4 and metering roller 6 are by means of cylinder piston assemblies, for. B. Pneumatic cylinder 7 as actuating units in the various roller Positions pivotable.
• the application roller 4 and metering roller 6 are driven by servomotors in synchronism with one another and to the press belt 3.
• FIG. 4 shows an embodiment in which the application roll 4 is rotatably mounted on one or more application roll carriers 12 , which are pivotally mounted on a base frame 13 fastened to the roller mill W, while the metering roller 6 is rotatably mounted on metering roller carriers 14, which are pivotably mounted on the application roller carriers 12.
• the metering roller 6 is not arranged completely separately on the base frame, but rather on the applicator roller carrier 12.
• the application roller carrier 12 can be designed, for example, as an L-shaped carrier.
• 5A, B and C on the other hand illustrates the transfer of the rollers 4, 6 from the working position to the waiting position.
• the applicator roller carrier 12 can be pivoted so that the applicator roller 4 and metering roller 6 are pivoted together (FIG. 5B).
• the second cylinder piston arrangement 7b the metering roller carrier 14 can be pivoted without influencing the position of the application roller 4 (cf. FIG. 5C).
• FIG. 6 shows an embodiment in which the two roller ends of the application roller 4 can be pivoted independently of one another in order to achieve a targeted adjustment of the pressing forces across the width.
• the application roller 4 is supported on both sides in spherical roller bearings 15.
• a synchronous shaft 16 is provided, which has the effect that the spherical roller bearings 15 cannot swivel out completely or track out.
• the same or a similar arrangement can otherwise be provided for the metering roller 6.
• FIG. 7 shows a modified embodiment of the invention, in which the release agent bath 5 is in a doctor blade chamber or doctor blade 17 is arranged.
• the metering roller 6 consequently dips into the separating means arranged in the chamber of the chamber doctor, the chamber being delimited by the two doctor blades 18 indicated.
• the chambered doctor blade system 17 is arranged below the metering roller 6 and consequently essentially horizontally.

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• Coating Apparatus (AREA)
• Paper (AREA)
• Treatment Of Fiber Materials (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34177611

Family Applications (1)

Country Status (5)

Families Citing this family (16)

Family Cites Families (10)

• 2003
  • 2003-08-16 DE DE10337594A patent/DE10337594B4/de not_active Expired - Fee Related
• 2004
  • 2004-08-13 CN CNA2004800235001A patent/CN1835808A/zh active Pending
  • 2004-08-13 EP EP04764092A patent/EP1654073A1/de not_active Withdrawn
  • 2004-08-13 CA CA002535954A patent/CA2535954A1/en not_active Abandoned
  • 2004-08-13 WO PCT/EP2004/009097 patent/WO2005018827A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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