CN101985335B - Apparatus and method for stabilizing a moving web - Google Patents

Abstract

Devices and methods related to a web stabilizer for stabilizing a moving web with a surface adjacent the moving web and with a supply of moving fluid in a direction parallel to the moving web and a supply of moving fluid in a direction perpendicular to the moving web.

Description

For equipment and the method for the web of stable movement

This application claims the U.S. Provisional Patent Application No.61/224 submitted on July 9th, 2009, the preceence of 190, it is incorporated herein by reference in full.

Background technology

The web (including, but are not limited to flimsy material, paper handkerchief, paper, cardboard, plastics and poly-mer) of material is carried through the span usually with web stable device, described web stable device as U.S. Patent No. 4,321,107 and U.S. Patent No. 5,738, shown in 760.Web passes through stabiliser span with relative high-speed mobile, and crosses stabiliser.

When web moves through the flat surface of these stabilisers, the lateral edges of web tends to curling.Curlingly increase the stress being applied to web, be particularly applied to the stress at web edge place.The curling stretching, extension causing web uneven on whole web width, and the risk increasing that web tears.Lateral edges leaves from stabiliser is curling because the material on the external influence factors such as web strain, weight, the difference of material property aspect, such as air-flow and web end is only connected to the fact of other web material in the one side of web usually.Therefore, be badly in need of providing a kind of apparatus and method to reduce curling at web edge.

Other structures are proposed, the U. S. application No.12/695 that such as on January 28th, 2010 submits, one or more structures described in 620.

Summary of the invention

Curling in order to minimize web, apply at least two power: at least one power is applied to the sheet edges region exterior of stabiliser; At least one power is applied to the main body of web.

Described power is applied to the sheet edges region exterior of stabiliser, so that the lateral edges of web is pulled to stabiliser.By the lateral edges of web is pulled to stabiliser, the edge of web keeps other part conllinear moving through stabiliser with web.Minimize the stress in the curling reduction web material of lateral edges, reduce web and break, and the performance of web material can be improved, because side is subject to less stress and stretching.

The power being applied to stabiliser sheet edges region exterior moves away web edge by air and is formed.Such as, pressurized air or vacuum can be applied to sheet edges place or near, to be detached from web edge by air, produce suction web edge being pushed to stabiliser.In order to produce this suction, the gap by sheet edges place promotes or withdrawing air.This gap is parallel to the lateral edges of web usually, and is adjacent.When air flows through this gap, pressure drop is formed in sheet edges place, the lateral edges of web is pulled to the sheet edges of stabiliser.

In order to produce the power being applied to web lateral edges, the air above sheet edges moves preferably along the direction left of flowing from web, perpendicular to sheet edges, and with the expection height alignment of web.Air moves and can lead along other directions, comprises toward or away from stabiliser.Air flowing should form low pressure between web and stabiliser sheet edges, to make low pressure, the lateral edges of web is pulled to sheet edges.

When web is near stabiliser, apply the power suppressing web to be waved to web main body.In order to produce the power being applied to web lateral edges, the air above sheet edges moves preferably along being parallel to or being arranged essentially parallel to the flowing of web flow direction.Air moves and can lead along other directions, as long as certain vector of air stream and web moving direction cocurrent flow.Air stream shape should give birth to buffer zone, to suppress waving of web between web and stabiliser.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the web stable device according to one aspect of the invention.

Fig. 2 is the schematic side elevation of the web stable device according to one aspect of the invention.

Fig. 3 is the schematic cross sectional views of the web stable device according to one aspect of the invention.

Detailed description of the invention

Fig. 1-3 be web stable device 100 and below this stabiliser the schematic diagram of the web of movement.The fluid of movement, is preferably the gases such as such as air and introduces along two parts: near the Width substantially along stabiliser of web edge outside and the length direction substantially along stabiliser.

As indicated by arrow (it indicates air flow line), gap 102 can be substantially perpendicular to web moving direction and introduce air.Although to illustrate perpendicular to web moving direction (namely measuring in 90 ° from web moving direction), any suitable angle can be used.Such as, " the side direction air " introduced by the gap 102 being positioned at moving web side can become arbitrarily angled (such as becoming 75 ° substantially) between 0 and 90 ° from the measurement of web moving direction, or is even the arbitrarily angled of in 90 ° ± 60 °.

Same as indicated by arrow (it indicates air flow line), gap 104 can be arranged essentially parallel to web moving direction (namely substantially becoming 0 ° from the measurement of web moving direction) and introduce air.Other suitable angles can be used.Such as, " ladder air " can become from air moving direction measure arbitrarily angled ± 90 °.

Stabiliser 100 can be designed for the web processing any suitable dimension, such as about 212 inches of wide webs.Can consider less and larger width, and about each aspect of the present invention, the exact width of web is relatively inessential.

The fluid (such as air) of the movement introduced by gap 102 and gap 104 produces the power making web stable, may suppress curling and/or wave.Under many circumstances, alleviate curling and/or wave and can reduce chip fracture, and improving performance and the speed potential of web machine.

This machine can be used for manufacturing in the method for flimsy material, paper handkerchief, paper, cardboard, plastics and/or poly-mer.At least some embodiment can be used for manufacturing ductile thin metal layer or other films.

Fixing web stable device 100 can be generally rectangular devices, has straight bottom surface substantially, as described more comprehensively herein.Web is usually to move in described straight bottom surface at a high speed.The movement of web produces difference of pressure on the opposite face of web, and web is pulled to this surface by this difference of pressure.Can be adjacent with the bottom of stabiliser in the middle part of web.The lateral edges of web may leave from the bottom of this stabiliser is curling.Expect that elimination is curling, and lateral edges is pushed in the plane identical with in the middle part of web.And, expect that the middle part simultaneously making web is stablized.

In order to eliminate the curling of web lateral edges, the fluid of movement, such as air leaves from lateral edges guiding, produces and is applied to the transverse force of lateral edges, and simultaneously, the fluid of movement leads along web moving direction, to produce the consistent power in the direction that is applied to web.Transverse force makes the lateral edges of web move towards the outward flange of stabiliser, and the consistent power in this direction prevents web from colliding stabiliser.

Term " air " is used in reference to the fluid of movement, and it is preferably atmospheric air, but can be other gases and liquid, and comprises use vacuum or other negative pressurees.In certain embodiments, such as, movement fluid alternately can comprise spendable inertia or the gas (such as unreactable gas, nitrogen etc.) of inertia substantially.And in certain embodiments, the fluid of movement can promote the reaction in web or in web.Such as, the use of oxygen can promote the oxidizing reaction on its surface.

Air can flow through any suitable pipe and/or pipeline configuration, and can transmit about gap 102 and 104 and/or control separately.In some cases, air is sent to gap 102 and/or 104 by the hollow beam that at least one has an air nozzle.

Gap 102 and/or 104 can comprise air knife, pipeline, beam or the bar with inner passage and air nozzle, and described inner passage and air nozzle are by being formed along described device length boring or fluting.In the lower surface that this device is preferably mounted at stabiliser 100 or near, and particularly, in chip edge region place or the outside of lower surface, and along the width of stabiliser 100.Alternately, stabiliser can be arranged on below web, and has the upper surface adjacent with web, and wherein air moving device is arranged on the top of upper surface.The surface adjacent with web of stabiliser can be straight, arc, epirelief shape or other shapes towards web.

Under moving and be in by the air in gap 102 and/or gap 104 and enough affect the position of web edge and web main body and the pressure in direction and speed, make whole web, comprise web edge owing to reducing to wave and curling and become more stable.

The surface adjacent with web of stabiliser 100 can be smooth or coarse surface, bottom (or top) and plane surface.

Can be introduced along lateral dimension from exceeding web edge by the air in gap 102, such as distance web edge is in the scope of zero to ten two inches.Can introduce air makes air flow along the surface of stabiliser.In certain embodiments, air leaves from web edge along the direction flowing being arranged essentially parallel to stabiliser surface.

Fig. 2 schematically shows the lateral plan of stabiliser 100, shows the gap 106 and 108 for " side direction air ", and described " side direction air " provides (as shown by arrows) perpendicular to web moving direction at least partly.Side direction air makes web edge stablize in operation, and hole in gap 106 and 108 or perforation 110 and 112 provide air along being orthogonal to graphic side-looking direction (the air part namely through hole or perforation 110 and 112 leads towards viewer) at least partly.Gap 106 and 108 is limited by the position difference on surface 130 and 132.Web stretches in the plane being arranged essentially parallel to surface 130 and 132 along the width of stabiliser 100.

As what schematically show in the cutaway view of Fig. 3, gap 116 and 114 provides " ladder air " along web moving direction.Gap 116 and 114 can be any suitable height, such as, any height in 1/16 " to 3/4 " (or larger) scope.These gaps can have multiple hole or perforation, and it provides air to carry out stable web in operation.Such as, each ladder can have several thousand, such as 3600 perforation.This some holes or each diameter of boring a hole for about 0.001 " or larger (such as 0.01 ").

Although only illustrate two gaps, alternate embodiments can comprise single gap to provide " side direction air ".In addition, other embodiments can comprise three or more gap to provide side direction air.The groove preferably with equal number provides " side direction air " with " ladder air ".

As shown, surface 130 and 120 has hierarchic structure, wherein provides the gap 116 and 114 of " ladder air " that the surface of stabiliser 100 is changed.Surface 130 and 132 is discontinuous about web moving direction, and web moving direction is arranged essentially parallel to stepped surfaces 130 and 132.

Axle 118,120,122,124,126 and 128 individually, selectively and/or is jointly provided for the fluid (such as air) of side direction air and ladder air to these two gaps.These axles can additionally or alternatively provide base that stabiliser is in place.Axle is by any suitable equipment, and such as flexible pipe, pipeline etc. are connected to gap 102 and 104.

Although the present invention is about thinking that the most practical and preferred embodiment are described at present, but should understand, the invention is not restricted to the disclosed embodiments, but on the contrary, be intended to cover and be included in respective modification in claims spirit and scope and equivalent arrangements

Claims (20)

1. a web stable device, comprising:

Be suitable for the surface adjacent with the mobile material web along the movement of web direction,

Wherein, described surface comprises the first gap, and it is suitable for receiving along the first direction parallel with web direction and leading first moving fluid; With the second gap, it is suitable for receiving along the second direction perpendicular to web direction and guiding second moves fluid, to make described first to move fluid to described moving web provider to consistent stability force, and described second moves fluid and provides lateral stability power to moving web

Wherein, the first gap is substantially along web stable device length direction, and the second gap is substantially along web stable device Width.

2. web stable device according to claim 1, wherein, described first direction is the direction of web directional survey between 0 and 90 ° from being limited by web moving direction.

3. web stable device according to claim 1, wherein, described second direction is the direction of web directional survey between 30 and 150 ° from being limited by web moving direction.

4. web stable device according to claim 1, wherein, described second direction is the direction of web directional survey between-90 and 90 ° from being limited by web moving direction.

5. web stable device according to claim 1, wherein, described first gap comprises multiple hole, and wherein, the diameter in described hole is 0.001 inch to 0.01 inch.

6. web stable device according to claim 1, wherein, described second gap comprises multiple hole, and wherein, the diameter in described hole is 0.001 inch to 0.01 inch.

7. web stable device according to claim 1, wherein, the height in described first gap is between 1/16 inch and 3/4 inch.

8. web stable device according to claim 1, wherein, the height in described second gap is between 1/16 inch and 3/4 inch.

9. web stable device according to claim 1, also comprises at least one axle, is fed to described first gap for moving fluid by described first, and moves fluid by described second and be fed to described second gap.

10. web stable device according to claim 1, wherein, described second gap is arranged near the edge of described web edge outside.

11. web stable devices according to claim 1, wherein, described first gap is along the length direction substantially of described web stable device, and wherein, described second gap is along the Width substantially of described web stable device.

The method of the web of 12. 1 kinds of stable movements, comprising:

Along the described web of the adjacent movement in surface of web direction and web stable device;

Move fluid by first to be supplied by the first gap, move fluid to make described first and move along the first direction parallel with described web direction, wherein, described first moves fluid to described moving web provider to consistent stability force;

Move fluid by second to be supplied by the second gap, move fluid to make described second and move along the second direction vertical with described web direction, wherein, described second moves fluid provides lateral stability power to described moving web,

Wherein, the first gap is substantially along web stable device length direction, and the second gap is substantially along web stable device Width.

13. methods according to claim 12, wherein, described first moves fluid and second at least one movement in fluid comprises air.

14. methods according to claim 12, wherein, described first moves fluid and second at least one movement in fluid comprises unreactable gas.

15. methods according to claim 12, wherein, described web comprises flimsy material, paper handkerchief, paper, cardboard, plastics or poly-mer.

16. methods according to claim 12, wherein, described first direction is the direction of web directional survey between 0 and 90 ° from being limited by web moving direction.

17. methods according to claim 12, wherein, described second direction is the direction of web directional survey between 30 and 150 ° from being limited by web moving direction.

18. methods according to claim 12, wherein, described second direction is the direction of web directional survey between-90 and 90 ° from being limited by web moving direction.

19. methods according to claim 12, wherein, the height in described first gap between 1/16 inch and 3/4 inch, and comprises multiple hole, and wherein, the diameter in described hole is 0.001 inch to 0.01 inch.

20. methods according to claim 12, wherein, the height in described second gap between 1/16 inch and 3/4 inch, and comprises multiple hole, and wherein, the diameter in described hole is 0.001 inch to 0.01 inch.