Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
  • D21G1/00—Calenders; Smoothing apparatus
  • D21G1/002—Opening or closing mechanisms; Regulating the pressure
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
  • D06B15/02—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by squeezing rollers

Definitions

• the invention relates to a device for processing web-shaped material, comprising a work roll extending in device length, a counter-system forming a counter-bearing surface, against which the web material can be pressed by means of the work roll over the working width corresponding to the web width, one on its front side the work roll and bearing on the catch side and they are subjected to the pressing force of the pressure bearing body, a support beam extending in the length of the device, the pressure bearing body and a support wall of the support beam being arranged so as to be movable relative to one another in the pressure direction, and a pressure device generating pressure force which changes between the pressure bearing body and the support wall during the relative movement ,
• the device length extending space and a pressure hose arranged therein, whereby between a mating surface formed on the back of the press bearing body for the hose and the support wall is provided with a pressure which exerts contact pressure via the back of the press bearing body and is oval or flat in profile cross section, the pressure volume of which is determined by the pressure
• a generic device is known from US Pat. No. 2,878,778.
• the pressure device with an inflatable pressure hose proves to be particularly suitable for generating the desired high contact pressures on the work roll (squeeze roll).
• An edge clamp fastening provided for the hose leads to wear and a relatively low durability.
• Bearing rollers are axially supported and guided on a swiveling frame on which the pressure force generated by the pressure hose is exerted.
• EP-B1-0 534 930 special measures for the elastic adaptation of the work roll are provided, several pressure-generating, separately controllable elements being formed by pneumatic pistons.
• the objects of the invention are to improve a generic device for processing web-like material with regard to simple construction, durability, operational safety, maintenance, work function and result.
• the pressure hose is provided as a pressure hose element which, viewed in the longitudinal cross section of the device, is L-, U- or oval-shaped with at least one from the hose counter-surface to the rear of the device Curvature section directed to the rear and extended with a contact section coming into flat contact with the hose counter-contact surface, a hose-free space being formed with each hose pressure filling state with each curve section between the hose counter-contact surface and the support wall.
• at least one end of the pressure hose element is turned back towards the rear longitudinal side of the device.
• a particularly advantageous and expedient embodiment of the invention consists in that a work unit formed from the press bearing body and work roll in a press connection is arranged between the counter system and the pressure hose element in such a way that the work unit, viewed in the device profile cross section, can be moved both in the press direction and transversely thereto without positive guidance .
• the pressure hose element arranged according to the invention interacts particularly favorably with the press bearing body arranged without positive guidance. This has three movement options for contact pressure, viewed in any profile cross-sectional plane of the device. This means that each point of the press bearing body can move in the plane with two displacements in mutually perpendicular directions and with partial rotation around the respective body point. Due to the circumferential storage of the
• Work roll on the press bearing body is also possible for the work roll with the three degrees of freedom.
• the work roll In the area of the pressure positions of the work roll, it is practically floating in the operating state, i.e. stored in relation to the support wall of the support beam without translational guidance and without pivoting guidance.
• press bearing body is arranged in the area of the pressing positions in a free space in which it finds its positions freely movable between the pressure hose element and the work roll.
• the work unit works smoothly with automatic adaptation to the operating state, and that without costly complicated drive and control means. It has been found that work function and work result are already significantly improved due to the freedom of movement with the three degrees of freedom if this free play is relatively small, namely with play by a few tenths of a millimeter is provided, it being expedient to increase the scope for larger working widths, ie for the use of relatively long press bearing bodies.
• the material of the pressure hose element is expediently so stretch-resistant that even with particularly large contact forces the hose bend section is so expansion-free that the hose bend in the hose bend section into the hose-free space is reliably avoided.
• the support bracket can comprise at least one second rear space located on the rear side of the device, the hose curvature section extending into the second space with support on at least one inner wall of the room .
• the support wall can expediently be provided with passages for the hose bend sections.
• Support wall between two passages forms a system core for a hose element enclosing it.
• the pressure hose element which is curved toward the rear is particularly advantageously suitable for dividing the zones over the working width.
• pressure hose elements arranged distributed over the length of the support beam are provided, the hose contact sections resting in a row arrangement on the press bearing body contact surface, and between the adjacent hose contact sections, these spacing-apart, hose-free spaces formed by the hose curvature sections are provided, while preferably those to the rear directed parts of adjacent curvature sections are in pressing contact.
• the support beam can expediently have an L-shaped or U-shaped profile cross section and be open towards the work roll, with at least one leg of the support beam profile advantageously forming a positioning element for the press bearing body and preferably each leg of the support beam completely engaging over the press bearing body.
• the support beam can expediently be displaceable in its position on the counter-system by means of a holding device and fixable in the local position.
• a particularly advantageous design consists in that a movement device is arranged between the holding device and the support beam, by means of which the distance of the support beam to the counter-system can be set and ascertained.
• FIG. 2 shows the device of FIG. 1 in partial longitudinal cross section according to view A-B
• FIG. 7 shows the device of FIG. 1 in longitudinal cross-section outside the operating state with a gap between the work roll and the counter system
• FIG. 8 shows the device of FIG. 7 in longitudinal cross section according to C-D
• FIG. 9 to 11 in profile cross section and in partial longitudinal cross section devices according to the invention with V-shaped bearing receptacle for the work roll and
• FIG. 12 shows a rinsing / cleaning feed line of the device in FIG. 11 in a longitudinal plan view and partial representation.
• Devices according to the invention according to FIGS. 1 to 12 comprise a support beam 1 forming a cross support beam, a pressure device 2 with pressure hose element 2.N, a press bearing body 3 supported thereon with bearing elements 4 or 410, 411, a work roll 5 which is located on the front side of the bearing body 3 is mounted circumferentially by means of the bearing elements, and a counter system in the form of a counter roller 6.
• Support beam 1, press bearing body 3 with bearing elements, work roller 5 and counter roller 6 extend across the device working width. This corresponds to the width of a web 90 to be machined, which width passes through the apparatus through a pressure gap (pinch joint) between work roll 5 and counter system 6.
• the work roll 5 is arranged in the region of the lateral apex of the counter roll 6, the axis of rotation of the work roll 5 lying in or in the region of a horizontal plane 61 in which the axis of the counter roll 6 lies.
• the rollers 5 and 6 rotate in opposite directions and pull the web 90 upwards through the pressure nip when the working pressure is applied.
• work roll 5 rotates to the left in direction L
• counter roll 6 rotates to the right in direction of arrow R.
• the support beam 1 and the counter roller 6 are mounted on a frame, not shown, of a processing machine.
• the counter roll 6 has a much larger diameter than the work roll 5 and is driven axially via its axis ends.
• the roller core is preferably made of stainless steel.
• the outer surface of the roller 6 can be refined, e.g. be chromed, or it is with an elastic jacket made of plastic, rubber or the like. fitted.
• the surface of the work roll 5 is preferably rubberized.
• the work roll 5 can be connected to a peripheral drive, not shown, arranged outside the working width, or else to an axial drive.
• the drive of the work roll 5 can take place for the special case that a very low frictional force acts in the pinch joint of the work zone 60.
• work zone 60 there is a friction between the roller 5 and the roller 6 due to the lagging roller 5. It has been found that the lag friction ideally adjusts itself automatically to suit every operating situation if the work roller 5 is without positive guidance, ie on all sides with free space during Pressure operation is arranged.
• the self-adjustment takes place at the lowest load on the web 90 and thus the best possible avoidance of web deformation due to compression or stretching. Conventional disadvantageous consequences associated with such deformations, in particular wear caused by friction, have been eliminated.
• the web 90 can optionally be guided perpendicular to the horizontal plane 61 or before and / or after passing the rollers 5, 6 with a loop on the counter roller 6.
• the web 90 is guided through an immersion trough 8 which is arranged below the treatment device and is filled with liquid medium (liquor), absorbing more or less liquor depending on the structure and nature.
• the web 90 in particular a foulard, is squeezed between the work roll 5 and the counter roll 6 as it passes through the work zone 60. The squeezed liquid drips back into the trough 8 arranged in the area under the squeezing point.
• the web which has only a minimal residual liquor after it has been squeezed, can be continued in the vertical direction (web 90.0), or it can expediently be led to the top of the roller 6 and removed there (web 90.1). It can also be expedient to guide the web further behind the upper vertex of the roller 6 (web 90.2).
• the free edge of the lower longitudinal beam wall is advantageously extended in the form of an oblique draining surface 112, via which the liquor carried along by the pressure zones between the bearing elements of the body 3 and the work roll 5 is guided into the trough 8.
• the supporting beam 1 which is set and fixed in its local position during the working operation, is subdivided into a U-shaped front space open towards the counter-roller 6 and a rear flat space 16, which extend parallel over the working width .
• the wall between the rear space 16 and the front space forms a support wall 12 with a flat contact surface for the flat sides of straight contact sections 21 of flat pressure hose elements 2.N.
• a flat contact surface 31 of the press bearing body 3 bears against the other flat sides of the pressure hose elements 2.N.
• the press bearing body 3 In a basic operating position according to FIGS. 1 and 2, the press bearing body 3 is only in contact with the work roll 5 with the pressure hose elements 2.N and bearing elements forming cylindrical press rod bodies 4. From this position, the bearing body 3 is under the action of the hose force, viewed in the end profile cross section, with respect to each point parallel to the horizontal plane 61 in the double direction T2 or in the pressing direction and perpendicular to it in
• the press bearing body 3 thus has three degrees of freedom of movement when viewed in the device profile cross section. These degrees of freedom exist equally for the work and functional unit formed in the pressure connection, which is thus formed by the pressure system of the bearing body 3 with its rod bodies 4 on the work roll 5. It can be seen that the working unit 3, 4, 5, both in the pressing direction and transversely thereto, has scope to find its operating position. As a result, the pressure roller 5 automatically and smoothly finds the optimal pressure system against the counter roller 6 in the play area. This positioning is called self-positioning in the following. As can be seen from FIGS.
• the bearing body 3 is also with three degrees of freedom in its cross-sectional planes with respect to each point T4, T5 and D6 movable.
• gap gaps S are provided between the end faces of the bearing body 3 and the end walls 110 of the supporting beam 1. All of the exemplary embodiments have this type of play mounting of the bearing body 3 or of the work roll 5.
• positioning elements 11, 110 are formed by the legs or end walls of the U-profile of the supporting beam 1, which is open towards the contact roller 6. These elements 11, 110 limit the free movement of the bearing body 3 with the three degrees of freedom.
• the free offset / tilt setting is e.g. between the maximum positions shown in the device profile cross section in FIGS. 5a and 5b.
• the range of the operating play movement of the pressing body 3 with three degrees of freedom can be relatively small, in particular in the case of small and medium working widths. It has been found that in the diagonal tilt positions according to FIGS. 5a and 5b, distances F of the inner bearing body edges from the positioning elements 11 are expediently in the order of magnitude of 0.5 mm to 5 mm in order to achieve the operational floating mobility for self-positioning.
• the space of the support beam 1 open to the counter roller 6 also forms a holding space for the press bearing body 3, specifically for setting up and outside of the pressing operation.
• Fig. 4 There the bearing body 3 stands on the lower longitudinal wall of the support beam 1 forming a positioning element 11. In this position, the work roll 5 rests with its ends on storage elements 51 which are arranged outside the working width on the front sides of the device.
• a slide and cover film 43 is arranged there between the cylindrical pressure rod bodies 4 and the work roll 5, which extends over the length of the rod bodies 4. Outside the operating state, the film 43, the upper edge of which is attached to the holding device 7 by means of a clamping groove 72 above the supporting beam 1, hangs vertically downward with a flat surface.
• the film 43 ensures that the rod body 4 and the bearing body 3 are not contaminated by liquor or liquid.
• the substance reaching the film runs downwards over its lower free edge into a receiving channel.
• the film 43 forms a sliding system and surface for the
• the film 43 is held taut between the clamping groove 72 and the rod bodies 4, specifically as a result of the roller movement in the direction L directed downward, away from the clamping groove 72, between the rod bodies 4 and the work roll 5.
• the film 43 and its material are such that it is curved in the pressing area according to the curvatures of the rod body 4 and the work roll 5, so that it is adaptable to the extent that it is shown in dashed lines in Fig. 4.
• Work roll 5 is not hindered. It is particularly expedient to provide the film 43 on both sides with particularly slidable surfaces.
• the support beam 1 is preferably held at its ends outside the working width with holding devices 7 of an application machine, not shown.
• the devices 7 are preferably adjustable in height, that is to say arranged at a distance from the horizontal plane 61.
• the height positions can be determined.
• 5a and 5b are two positions of the translationally offset perpendicular to the horizontal plane 61 Support beam 1 shown in FIG. 1. In Fig. 5a, the support beam 1 is slightly upwards by the dimension A, while in Fig. 5b it is offset slightly downwards by the dimension B. With such an offset, the flow of force for pressing can be influenced in a targeted manner.
• ribs 32 are formed continuously over the length of the body.
• Corresponding raised elements can be provided instead of the ribs. They form, in the respective cross-sectional diagonal of the
• Bearing body 3 considered. Tilting edges which come to rest against the positioning elements 11 or, as can be seen from FIG. 4, feet for the bearing body 3 which stands on the lower wall outside the operating state.
• the operating offset arrangement of the work roll 5 explained with reference to FIGS. 5 a and b can also be expediently brought about in that, as shown in FIG. 3, the support beam 1 is arranged to be pivotable and lockable about the axis of the counter roll 6.
• the inclined position thus achieved is particularly favorable for adaptation and self-positioning.
• the holding device 7 is formed by a cross member which is open to the counter-roller 6 and which is adjustable and adjustable in position at the end outside the working width.
• a bearing 73 for the holding device 7 can be formed by an auxiliary device comprising machine-stationary bearing elements in order to position the holding device 7 in directions V transversely to the work roll 5.
• the device 7 is fixed in the desired position so that it forms a stationary support body in the operating state.
• the holding device 7 also forms a sliding receptacle for the support beam 1.
• a pneumatically operated movement device 71 is arranged between the rear wall of the cross member and the rear wall of the support beam 1, by means of which the distance of the support beam 1 to the counter roller 6 can be set and ascertained.
• the movement device 71 by actuating the movement device 71, the supporting beam 1 in the sliding receptacle of the holding device 7 can be brought back inwards in order to have sufficient set-up space available in the set-up position for pulling in a web 90 and / or for changing the work roll 5 or the counter roll 6.
• the holding device in its holder 73 to be moved away from the counter-roller 6 in order, as shown in FIG. 4, to release the film 43 and the work roller 5 on both sides on the longitudinal side.
• the work roll 5 is mounted exclusively on the circumferential side on the press bearing body 3, specifically by means of the bearing elements arranged on the bearing body 3 and exposed on the front side thereof.
• the bearing elements it is expedient for the bearing elements to be cylindrical pressing rod bodies 4 with the same circular cross section, the rod diameters of which are smaller than that of the work roll 5.
• the rods 4 can be arranged fixedly or can be accommodated as rotatable rollers 4 in corresponding roller receptacles of the bearing body 3. It was found that, depending on the state of self-positioning, one or both roles during work, ie without Self-propelled rotating work roll 5, stand still.
• the press bearing body 3 can shift around the roller 5, ie on a circular arc corresponding to its diameter, to a suitable extent.
• the rod roller circumferential bearing for the work roll 5 is also particularly advantageous in order to be able to use interchangeable work rolls 5 with different diameters.
• the floating displacement according to the invention is also suitable in combination with a shell-shaped slide bearing trough instead of the rod rollers 4.
• a sliding shell 411 forms a shape-adapted receptacle 42 for the work roll 5. It is expediently provided as an independent contact body, which can be inserted in the press bearing body 3 in captive fashion in the cross section of a trapezoidal plug-and-socket fitting.
• a slide receptacle 41 with a V-shaped cross section is provided instead of the rod roller bearing for the work roll 5.
• a blunt pick-up angle 1 is formed, the work roll 5 being in tangential contact with flat sliding surfaces of two pressure plates 410 arranged in a V-shape.
• These are expediently detachably integrated in the press bearing body 3, e.g. by means of a trapezoidal push-fit, as shown in FIGS. 9 and 11.
• the abutment bodies or surfaces which are in direct contact with the work roll 5 and are associated with the press bearing body 3 advantageously consist of highly slidable polytetrafluoroethylene or the like. Material, wherein the parts can be solid or can be coated with such material. J OJ to t P> P 1
• P- P- x 3 ⁇ Cü ja Cu: ⁇ ⁇ rt ⁇ ⁇ P- ⁇ ⁇ tr P- 3 cx ⁇ H. * i 3 ⁇ ⁇ cn ⁇ P- Cu 3> H 3 3: Xo ⁇ pr Cü P - CQ ⁇ P- 3 ⁇ P « H. ⁇ ⁇ P- 00 CU ⁇ 3 cx Cu ⁇ CQ
• each hose element 2.N is set by means of a controllable valve connected in line 25. Pressure medium source and valves are not shown in the drawing. With the selected pressurization of the elements 2.N, the desired uniform or non-uniform effect setting takes place across the working width. By switching off lateral pressure zones, the device can be used for web widths that are smaller than the length of the bearing body 3.
• the pressure hose element 2.N has two U-shaped curvature sections 22 which are directed away from the counter bearing surface 3 associated with the press bearing body 3 toward the rear of the device.
• the pressure hose element 2.N is a flatly extending piece of hose which, viewed in the longitudinal cross section of the device, has the shape of an elongated open oval ring.
• This hose element 2.N is captured in the rear flat space 16 of the supporting beam 1 and a flat space 15 between the support wall 12 separating the two spaces 15, 16 and the flat counter bearing surface 31 on the press bearing body 3.
• section 21 adapts to the profile cross-sectional shape of the flat space 15, which is trapezoidal when the bearing body 3 is in a tilted position. This adjustment and the free bedding on the hose section 21 stabilize the position of the bearing body 3 which arises in a floating movement.
• Each oval hose element 2.N is arranged exclusively within the support beam 1, in a loose position in the rooms 15, 16, ie without a fixed attachment to the support beam 1.
• the support wall 12 is provided with cutouts or passages 121. Their cross-section corresponds on the front walls 110 to the single and, moreover, to twice the flat tube cross-section.
• Each wall section between two passages 121 forms an abutment core for the oval tube element, the U-curvature portions 22, viewed in the longitudinal cross-section, enclosing the same in cross-section with the flat space 16, so that the straight portion of the oval tube ring in the space 16 is interrupted.
• hose-free gaps 150 are formed by the hose bend sections 22, with which the contact sections 21 are spaced apart. Hose-free gaps 150 also arise to the side of the places where the curved sections 22 come to rest on the front inner walls 110 and the rear longitudinal inner wall of the rooms 15, 16.
• the free end sections 23 of the oval pressure hose element 2.N are closed with closure bodies 24, the closure body 24 forming a connecting part at one end section 23 for connection to the preferably flexible connecting line 25. This is led out of the supporting beam 1 through a passage to the rear.
• the rear side of the bearing body 3 directly forms a flat counter abutment surface 31.
• a continuous intermediate plate 310 extending across the working width can expediently be provided between the hose abutment sections 21 and the rear of the bearing body 3 be arranged. This then forms the counter abutment surface 31 for the abutment sections 21 Hose elements 2.N.
• the plate 310 is very thin, that is to say that it has a thickness which is only a fraction of the thickness of the rear wall 12.
• the wall thickness of the support wall 12 is in the order of magnitude of the flat cross sections of the rooms 15, 16.
• the intermediate plate 310 consists of a material which adapts to a deflection.
• the bearing body 3 can have a smaller dimension in the profile cross section.
• the pressure hose elements 2.N are preferably fabric-reinforced, to the extent that the wall material is so stretch-resistant that, even when the hose elements 2.N are subjected to particularly high pressure, the hose material is reliably prevented from expanding into the hose-free spaces 150, these Spaces 150 with the convexly curved curvature sections 22 are therefore distinctly present with each pressurization.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Casting Or Compression Moulding Of Plastics Or The Like (AREA)
• Rolls And Other Rotary Bodies (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)
• Machines For Laying And Maintaining Railways (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Lubricants (AREA)

Applications Claiming Priority (3)

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• 1996
  • 1996-11-02 DE DE29619695U patent/DE29619695U1/de not_active Expired - Lifetime
• 1997
  • 1997-10-29 AT AT97948829T patent/ATE215141T1/de not_active IP Right Cessation
  • 1997-10-29 US US09/297,305 patent/US6138559A/en not_active Expired - Fee Related
  • 1997-10-29 EP EP97948829A patent/EP0935685B1/fr not_active Expired - Lifetime
  • 1997-10-29 WO PCT/EP1997/005960 patent/WO1998020193A1/fr active IP Right Grant
  • 1997-10-29 DE DE59706796T patent/DE59706796D1/de not_active Expired - Fee Related

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