FI116149B - Method and apparatus for shoe press - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to a method for changing the distribution of load pressure in a shoe press in a shoe press in a shoe press having a plurality of adjacent press knobs in a shoe press. .

The invention also relates to an apparatus according to the preamble of claim 7.

In paper machines, compression normally takes place in a press gap, i.e. a press nip between press rolls, whereby the paper web is generally passed through a press nip between water-absorbing press felts which pass through the press nip together with the paper web. The length and geometric shape of the press nipple significantly influence the pressing result.

· In the shoe press loading system, several options are known to adjust the pressure distribution in the press nip.

• »t ·: ·: 25 Solutions are known in which the shoe press shoe is displaced sideways, typically in the machine direction, relative to the load unit -.- ··. unit. In solutions, the load cylinder is in place and the shoe moves.

Another solution for changing the pressure distribution of the press nip is. i.i ns. adjusting the tilt of the press shoe, i.e. tilting the press shoe relative to the counter roll. For example, DE 196 07 144 A1 discloses an embodiment of a tilt control solution in which the shoe is adjusted relative to the load unit cylinder.

. In WO 00/68497 the adjustment of the compression distribution is based on an eccentric 35 reason for the eccentric rotation of the eccentric rotating cylinder of the loading shoe, whereby the pressure distribution can be adjusted.

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US 6,159,342, in turn, moves the loading cylinder while the shoe itself is stationary.

In WO 91/00389, in turn, the press shoe is moved stepwise to provide a tilt adjustment.

FI-65103 discloses a solution in which the track-width support member, the cylinder, is moved in the longitudinal direction of the machine by screw means.

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In addition, several solutions are known for two-cylinder account adjustment.

The object of the present invention is to provide a completely new type of rat-15 which can be varied in many ways.

Brief Description of the Invention

The method according to the invention is characterized in that the press-side end of the load-bearing members and / or the end of the supporting member of the loading member are separately displaced.

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The process according to the invention is further characterized by what is stated in claims 2-6.

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The apparatus according to the invention is characterized in that the apparatus ···. ’Comprises means for displacing the press member side of the load member and / or the end of the support member side of the load member separately.

The apparatus according to the invention is further characterized by what it is

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mentioned in claims 8-12.

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The solution according to the invention has several significant advantages. I invent-. \ n The solution provides versatile control of the pressure distribution: 35 ground in the press nip. By adjusting each load member individually and individually by the top and the bottom, the adjustability can be further expanded. By using a special loading member and adjusting members which are 116149 3 connected to the piston parts of the loading member, a very inexpensive and functional solution is achieved to provide versatile adjustability. The solution of the invention enables a compact apparatus between the support beam and the press shoe. By using adjusting screws, the adjustment can be performed either manually or can be easily automated by actuators.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail by way of example with reference to the accompanying drawing, in which:

Figure 1 is a cross-sectional view of an apparatus according to the invention in the area of a press shoe.

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Fig. 2 is a view showing part of the structure on the support beam of the device of the invention in the section A-A.

DETAILED DESCRIPTION OF THE INVENTION The invention thus relates to a method for changing the distribution of the load pressure in a press gap or shoe press N, wherein the shoe press has a plurality of adjacent loading members acting on the press shoes. . Typically • · 25 load members K are moved separately. The clamping member 1 of the load member K and / or the end of the support member 5 of the load member K are moved separately. The piston portions 19, 20 of the loading member are separately displaced in the MD direction of the machine, guided by the form-fitting member in the space between the clamp 1 and the support beam 5. The load members K are moved by · · 30 by adjusting means 9. The end of the press member 1 of the load member K is moved relative to the press shoe. Load side support beam 5 halves' ··. the two ends are adjusted in relation to the support beam 5.

The invention also relates to an apparatus for changing the distribution of the load pressure in the press gap of the shoe press, i.e., the press nip 35, wherein the shoe press has a plurality of adjacent loading members K. The apparatus comprises means for moving mode. The apparatus comprises means for moving the load members K separately. The apparatus comprises means for separately displacing the shoe 1 end of the press member 5 of the load member and / or the end of the support member 5 of the load member.

The apparatus comprises means 9 for moving the piston portions 19, 20 of the loading member separately in the MD direction of the machine, guided by the shape connecting member in the space between the press shoe 1 and the support beam 5. The means for moving the load members comprise adjusting screws 9. The press shoe 1 is provided with a support member 11, in particular a projection, on which the adjusting screw 9 for moving the upper part of the load member is arranged. A support member 13 is provided in the support beam 5, on which the adjusting screw 9 for moving the end 15 of the load member 5 on the support member 5 is arranged to rest.

Figure 1 is a simplified illustration of a shoe press loading unit. In the figure, the counter roll R is above the press shoe. The center line of the shoe press roll is CL1, the shoe press loading member si-20 is known to be slightly offset from the center line of the roll by the center line CL2. F1 and F2 are blankets, B is a polyurethane sock, W;: · The material web is to be processed and R is part of the shoe press back roll ·: ··· 25 surface, N is the nip area between the shoe press and the counter roll.

• »•» · • * ·. ···! The loading member consists essentially of three parts, • two pivoting piston parts 19, 20, and movable outside the pistons. . The first piston 19 is freely supported by • · · 30 the press shoes 1 and the second piston 20, 67 by the shoe press roll support beam 5. Between the adjacent pistons in the transverse direction of the machine, CD - ;: ·, there are separate T-rails can be moved in the MD direction of the machine. Cylinder tube 28 is fastened 11 ·. \ to the second piston part 20 pivotally pivotable.

:::: 35 • »« * · The surface of at least one piston member 19, 20, 67 facing the inner wall of the cylinder member 28 is shaped to permit tilting (angular misalignment) between the piston member 19, 20, 67 and the cylinder member 28 from the longitudinal axis.

The first piston portion 19 is disposed on the shoe press shoe 1 and 5, the second piston portion 20, 67 is disposed on the shoe press support beam 5. At least a portion of the surface facing the inner wall of the cylinder 28 of the first and / or second piston The cylinder member 28 is disposed in a second piston member 20, 67 pivotally pivotally about the longitudinal axis, preferably with pivot pins 4.

The situation at the press nip N can be changed from the basic setting by moving the positions of the piston parts 19 and 20 relative to the deflected center line CL2 in the longitudinal or MD direction of the machine by means of adjusting means 15.

The design also allows the load member to be moved in different directions, and even the end of the press shoe 1 of the same load member in different directions than the end of the support member 5 of the load member.

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The structure according to the invention is typically implemented as follows: The lower surface 26 of the clamping shoe 1 has grooves 4, preferably a keyway, in the transverse or CD direction *: parallel to the cylinder. At the bottom of the grooves 4 are threaded bores 18 of the fastening member 3. The form-fitting member, preferably the T-wedge 2, is secured to the groove 4 by the fastening means 3.

• ·. ···. The first piston portion 19 has counter-grooves, preferably T-wedge grooves, on the CD-oriented sides. The first piston portions 19: lie freely between adjacent wedge members, preferably T-30.

The first and second piston portions 19 and 20 have, typically in one or more corners, a groove 22, preferably a T groove, in which the head 23 of the adjusting screw 9 rests.

! ·! : 35 '·: On the side of the first piston part 19, the adjusting screw 9 is locked by means of a thread 12 of the protrusion cam 11 and a locking nut 10. On the side of its piston portion 20, the adjusting screw 9 is locked to the support member 13 by a thread 17 and locking nuts 10.

On the surface 27 of the support beam 5, in the CD direction of the machine, there are parallel grooves, typically wedge grooves 8, in the CD direction parallel to the groove 8. At the bottom of the grooves 8 are threaded bores 21 of the attachment member 7.

The second piston portion 20 has, typically on the CD directional sides, counter-grooves, preferably T-wedge grooves, of the form-10 connecting member 6. The second piston portions 20 remain freely sandwiched between adjacent form-fitting members, preferably T-wedges.

The support member 13 and the support beam 5 are provided with threads 15 and 15 of the fastening member 14 and the support member 13 is secured to the support beam by means of fastening means 14, such as bolts.

Fig. 2 shows the situation on the support beam 5 in the region of the second piston part 20, 67. In the case shown in the figure, the upper members of the second piston part 20, 67 of Figure 1 have been removed from the loading member. The figure shows more clearly the adjusting means 9 for moving the second piston parts 20, 67.

The support member 13 may have passageways for the hydraulic inlet and outlet hoses: · *: 25 le / pipes 25. The support member 13 may additionally have recesses 24: * ·, · for the fastening member 10.

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If the loading members are placed side by side in the MD direction of the machine, it is possible to move one of the loading members while the other is stationary, or simultaneously to move or loosen the two.

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It will be apparent to one skilled in the art that the invention is not limited to the embodiments set forth above, but may be varied within the scope of the appended claims. In the Explanatory note possibly together T! Depending on the embodiment, the features presented with other features may also be used separately.

Claims (12)

A method of changing the distribution of the load pressure that rises in the press slot, i.e. in the press nip (N), to a shoe press, which shoe press is provided with several adjacent one another, on press acting actuating means, which loading means (K) are moved in the direction of the machine ( MD) in the space between the press cone (1) and the support beam (5), characterized in that the end of the loading means facing the press cone (1) and / or the end of the loading member (5) facing the supporting beam (5) is moved separately. Method according to claim 1, characterized in that the load means (K) are moved separately. 15 Method according to Claim 1 or 2, characterized in that the piston parts (19, 20) of the loading member controlled by a molding member are each moved in the MD direction of the machine in the space between the pressing cone (1) and the supporting beam (5). 20 Method according to any of claims 1-3, characterized in that the load means (K) are moved with actuators (9). • t III • V 5. A method according to any one of claims 1-4, characterized in that the portion of the load member (K) pointing towards the press cone (1) is moved relative to the press cone (1). • · t A method according to any one of claims 1 to 5, characterized in that the part of the load means (K) facing the support beam (5) is moved. . relative to the support beam (5). : 30 * I * 7. Apparatus for changing the distribution of the load pressure which; · raises in the press slot ie in the press nip (N) of a shoe press, which; · *. shoe press is provided with several adjacent, press-on, actuating load means, the device comprising equipment for:; Movement of the load means (K) in the direction (MD) of the machine in the space 10 116149 between the press cone (1) and the support beam (5), characterized in that the device comprises equipment with the end of the load means (K) pointing towards the press cone (1). and / or the end of the loading means facing the support beam (5) is moved separately. 5 Device according to claim 7, characterized in that the device comprises equipment with which the load means (K) are moved separately. Device according to Claim 7 or 8, characterized in that the device comprises equipment (9) with which the piston parts (19, 20) of the load member controlled by a molding member are moved in the MD direction of the machine in the space between the pressing cone (1) and each separately. the support beam (5). Device according to any of claims 7-9, characterized in that the equipment for moving the load means comprises adjusting screws (9). Device according to any one of claims 7-10, characterized in that the pressing cone (1) is provided with a support member (11), in particular a protruding cam, against which the adjusting screw (9) which moves the upper part of the loading member is arranged to support. > «· Device according to any of claims 7-11, characterized in that: the supporting beam (5) is provided with a supporting member (13), against which: ··· 25 the adjusting screw which moves the load member towards the supporting beam (5): is arranged to support. • · • · •> * •> · • * ► * • · T I '* *' · f «» 1 »» * *