WO2013092156A1 - Device for cooling moving flat material - Google Patents
Device for cooling moving flat material Download PDFInfo
- Publication number
- WO2013092156A1 WO2013092156A1 PCT/EP2012/073928 EP2012073928W WO2013092156A1 WO 2013092156 A1 WO2013092156 A1 WO 2013092156A1 EP 2012073928 W EP2012073928 W EP 2012073928W WO 2013092156 A1 WO2013092156 A1 WO 2013092156A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cooling
- flat material
- pressure
- belt
- circulating
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/20—Moulding or pressing characterised by using platen-presses
- B27N3/203—Moulding or pressing characterised by using platen-presses with heating or cooling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/26—Moulding or pressing characterised by using continuously acting presses having a heated press drum and an endless belt to compress the material between belt and drum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/34—Heating or cooling presses or parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
- B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
- B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/24—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using an endless pressing band
Definitions
- the invention relates to a device for cooling moving
- the invention relates to a method using the device and a UTMDF or UTHDF plate which has been cooled with the device.
- MDF stands for a medium density fiberboard or medium density
- Fiber board while HDF denotes the high-density fiberboard.
- the invention relates to sheet having a thickness of 1 to 5 mm and a density of 600 to 1200 kg / m3. At this point the thickness designation comes in the designation, the UT, to bear, the "Ultra Thin" characterizes
- double-belt cooling presses are known, by means of which an approximately 15 mm thick material plate can be subjected to shock cooling. From both
- Cooling stars have to be stored until they have reached a temperature at which they can be stacked, or the boards must be ground in similar installations because the surfaces are roughened.
- the object of the invention is therefore to provide a device with which a flat material according to the invention can be cooled in such a way without significant quality losses, that it can be further processed faster than the prior art allows.
- the object is achieved according to the device in that a plurality of cooling elements are provided in succession with at least one intermediate temperature compensation zone. It has been shown that it is possible with this arrangement in positive effect to cool the current sheet material before or possibly even after cutting into desired lengths very strong in the core.
- a goal that was achieved with this invention was to cool the sheet as a whole by at least 50 ° C. The entire cooling section should not exceed 25 meters as far as possible. This sibling goal is with the
- this is an inlet temperature of about 100 ° C to a temperature (preferably before the cut) of below 50 ° C, desirable and achievable - depending on the thickness of the sheet - even below 40 ° C.
- the temperature equalization zone is to be understood as a stretched section for the flat material, in which the surface temperature which is greatly reduced in the cooling element and the core temperature approach each other again.
- Vapor pressure equalization take place.
- the length of the contacting surface of a circulating belt or a rotating roller shell is at most 2000 mm, preferably at most 1000 mm.
- Cooling element simplifies constructively considerably. technological
- circulating belts can be encapsulated and / or conditioned to prevent condensation on the cold belts, preferably the temperature compensation zone is 100 to 2000 mm in length
- the internal heat is thus conducted out with the opportunity of moisture and vapor pressure equalization, and in contact with the next cooling element, the process is repeated until both surface and core temperatures are reached an approximately equal and low level au are.
- a counter element This not only acts as a counterforce to the pressure built up by the cooling element against the flat material, but is also suitably designed as a cooling element. This results in a Symmetrical temperature profile over the sheet thickness and the heat accumulated inside can flow off in two directions.
- the counter element and the cooling element are constructed largely identical. It is also advantageous if all cooling and counter elements are constructed substantially the same. This creates a module that has to be constructed only once depending on the fiber material width and finally, depending on requirements, can be used several times in succession.
- a pressure element is provided within the cooling element or counter element, which presses the circulating belt or the rotating roll shell against the sheet.
- a pressure element can be adapted in its elasticity and friction coefficients.
- the contact pressure can be generated via the pressure of the cooling fluid.
- pressure elements are used, which can be employed by one or more piston-cylinder units.
- the cooling fluid is passed under a pressure of 3 to 20 bar through one or more capillaries in a so-called pressure pocket, which is embedded on the tape or the jacket facing surface of the pressure element.
- Cooling fluid then flows over the framing webs of the pressure pocket and takes over two tasks. On the one hand, it provides for one
- frictionless fluid lubrication or gas cushioning which also absorbs the pressure on the sheet, and on the other hand, it cools the tape or sheath from the inside in direct contact. It is of great advantage if the pressure and / or the cooling power are divided in the direction of travel of the flat material and / or transversely thereto into a plurality of zones which can be controlled differently.
- the cooled strip or jacket has a significant influence on the forming surface quality of the sheet.
- Unevenness can arise due to variations in the scattering, ie they are variations in basis weight. These are even in modern systems in the order of 10 kg / m 3 with a mean plate density of 860 kg / m 3 .
- the pressure in the individual zones can be controlled via a processor, for example, based on the thickness differences determined by a sensor.
- the band or the jacket has a wall thickness of at most 0.1 to 2 mm and at least the surface of the band or the jacket consists of metal. As a result, the heat dissipation is facilitated because of the high thermal conductivity of the sheath or strip material.
- a 0.2 mm thick strip of electroformed nickel has proven to be particularly effective here.
- the temperature compensation zone is at least partially provided with a hood open towards the flat material. This creates between the cooling elements a temperature compensation zones with a conditionable atmosphere near the surface of the sheet. It can "flash" -like evaporations are avoided and thus tearing and roughening of the surface.
- the flat material is "calibrated" before it reaches the first cooling element, for which purpose it is provided that at least the first cooling element has a nip for the flat material
- rollers can be provided with adapted surfaces, so for example hard and smooth metal for
- rollers Producing a special smoothness, or with an elastic coating to achieve a uniform compaction.
- the rollers can be tempered.
- the object of the invention is achieved in that a cooling of at least 50 ° C takes place via the device described
- FIG. 2 shows a cross section through a cooling element
- Figure 3 is a three-dimensional view of a cooling element without tape
- Figure 4 is a diagram in which the temperature profile of the core and surface of a sheet over the treatment time is shown in the device according to the invention.
- the device 1 for cooling a flat material 2, in particular of (UT) MDF or (UT) HDF plates, shows in the web running direction first a calibrating nip 3 and then a plurality of cooling elements 4 connected in series, each with a circumferential contact surface of more than 100 mm to the sheet 2, and their counter-elements 4 'on the opposite side of the sheet 2.
- the counter-elements 4' are constructed identically, as the cooling elements 4, so that the device has a plurality of similar modules.
- Both cooling element 4 and counter element 4 ' have a frame 8 in which two guide rollers 6 are mounted.
- the contact surface 5 is formed in this case by an over the two guide rollers 6 circumferential metal strip 7. Alternatively, however, flexible roll shells would be conceivable.
- Each cooling element 4 has at least one, not shown, connection for a cooling fluid.
- the band has a very low Thickness of, for example, 0.3 mm and is made of a good heat-conducting metal such as steel or better nickel.
- the temperature of the cooling fluid can be monitored and as soon as the cooling fluid in the sealed cooling element 4 has exceeded a temperature limit, it is discharged via drain lines, not shown.
- cooling device 1 In order to make the cooling device 1 according to the invention to be particularly effective, at least 10 cooling elements 4 should be connected in series (for illustrative reasons only four are shown in FIG. 1). If the metal strip 7 also has a surface roughness Ra below 0.8 ⁇ even after-smoothening effects can be generated.
- Sheet 2 is located in the temperature compensation zone 10, flows
- the temperature compensation zone 10 is covered by a hood 1 1, to create a favorable, humid, so conditioned atmosphere, so as not to Flashverdampfept and thus to a roughening of the surface the sheet 2 comes.
- the temperature compensation zone 10 has a length of 100 to 2000 mm, in this embodiment about 900 mm.
- the temperature compensation zones prevent condensation of ambient air on the sheet 2 or the belt 7. Accordingly, in a manner not shown, each band 7 may be at least partially housed in order to avoid condensation.
- the nip 3 is formed by two rollers 12, 13.
- the roller 12 is a roller with a bending over at least one support member 14 and engageable against the backing roll 13 coat 15th About the at least one support member 14, the sheet 2 is also pressurized and smoothed or calibrated accordingly.
- circumferential metal band 7 presses the pressure element 9, which is supported on the frame 8.
- the pressure element 9 which is supported on the frame 8.
- Pressure element 9 pockets 16 are introduced. These pockets 16 are supplied with pressurized cooling fluid, so that builds up a pressure pad between pressure element 9 and 7 band. The contact pressure can therefore be generated via the pressure of the cooling fluid.
- the area of the edges of the flat material 2 is provided with a plurality of narrow pockets 16 ", while the pockets 16 'in the center of the sheet can be larger.”
- the meaning is that one can more accurately adjust pressure and cooling to the often drier or thinner edges of the sheet 2 then to obtain a uniform transverse profile of the flat material 2.
- the spring 17 acts on the edge even in the opposite direction to the
- the entire cooling element 4 can be adjusted to different, ie varying flat material widths with the aid of this design of a plurality of narrow pockets 16 ", which can be controlled individually with cooling fluid, and the zones 16 ', 16" are accordingly created by the pockets. to respond to any cross profile deviation in the flat material.
- the cooling element 4 is shown in three dimensions.
- the tape 7 was not drawn. With this illustration, the pocket distribution of the pockets 16, 16 'and 16 "in the pressure element 9 is better illustrated.
- the technological mode of operation of the device according to the invention can easily be demonstrated with reference to the diagram in FIG. 4 with reference to a practical example.
- the temperature is plotted over the cooling time.
- the curve A stands for the core temperature of the sheet 2 and the curve B shows the temperature profile at the surface.
- the flat material in this case a UTHDF plate with a thickness of 3 mm, runs at a continuous temperature of 100 ° C. onto the first cooling element 4.
- the surface is abruptly cooled to about 30 ° C by contact with the belt 7, which should have a thickness of 0.1 to 2 mm.
- the temperature of the cooling fluid in this case water
- Cooling elements 4 and temperature compensation zone 10 are designed so that they are traversed at a speed of 1, 8 m / s each 500 ms. There are sixteen cooling elements in total
- the total length of the device according to the invention is therefore about 28 meters.
- zone 1 16 'Hydrostatic pockets in middle of flat material, zone 1
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201290001158.5U CN204382452U (en) | 2011-12-22 | 2012-11-29 | For cooling the equipment of the flat material of movement |
ATGM9022/2012U AT14313U1 (en) | 2011-12-22 | 2012-11-29 | Device for cooling moving flat material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011089536A DE102011089536A1 (en) | 2011-12-22 | 2011-12-22 | Device for cooling moving flat material |
DE102011089536.1 | 2011-12-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013092156A1 true WO2013092156A1 (en) | 2013-06-27 |
Family
ID=47297219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/073928 WO2013092156A1 (en) | 2011-12-22 | 2012-11-29 | Device for cooling moving flat material |
Country Status (4)
Country | Link |
---|---|
CN (1) | CN204382452U (en) |
AT (1) | AT14313U1 (en) |
DE (2) | DE102011089536A1 (en) |
WO (1) | WO2013092156A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105416984B (en) * | 2015-12-08 | 2018-11-23 | 中山市信立富机械科技有限公司 | A kind of melt material transport establishment |
DE102018130019B4 (en) * | 2018-11-27 | 2021-02-25 | Azl Aachen Gmbh | Device for pressing processing of flat material |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5463946A (en) * | 1993-06-14 | 1995-11-07 | Hermann Berstorff Maschinenbau Gmbh | Continuously operating material press with lubricating film for reducing friction |
US6126883A (en) * | 1997-11-17 | 2000-10-03 | Lindauer Dornier Gesellschaft Mbh | Method and apparatus for cooling hot-pressed panels, especially wood chip and fiber panels |
DE19919822A1 (en) | 1999-05-01 | 2000-11-02 | Dieffenbacher Gmbh Maschf | Manufacture of continuous sheets of chipboard includes sudden cooling after bonding by passing between bands sprayed with water |
DE19926155A1 (en) | 1999-06-09 | 2000-12-14 | Dieffenbacher Gmbh Maschf | Wood and/or plastic based panel production by continuous hot pressing until the faces have hardened, transferring via a roll press to a double belt press and cooling at specific temperatures |
DE10205894A1 (en) * | 2002-02-13 | 2003-08-21 | Dieffenbacher Gmbh Maschf | Method and appliance for producing compressed material involve steel belts running over drive and deflector cylinders, with press bars |
DE102007021200A1 (en) * | 2007-05-05 | 2008-11-06 | Dieffenbacher Gmbh + Co. Kg | Pressed material mat compressing method for use during production of e.g. thin medium-density fiberboard plate, involves aerating pressed material mat across narrow surface, and pressing excessive air towards production direction on path |
-
2011
- 2011-12-22 DE DE102011089536A patent/DE102011089536A1/en not_active Withdrawn
- 2011-12-22 DE DE202011110527.3U patent/DE202011110527U1/en not_active Expired - Lifetime
-
2012
- 2012-11-29 CN CN201290001158.5U patent/CN204382452U/en not_active Expired - Lifetime
- 2012-11-29 AT ATGM9022/2012U patent/AT14313U1/en not_active IP Right Cessation
- 2012-11-29 WO PCT/EP2012/073928 patent/WO2013092156A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5463946A (en) * | 1993-06-14 | 1995-11-07 | Hermann Berstorff Maschinenbau Gmbh | Continuously operating material press with lubricating film for reducing friction |
US6126883A (en) * | 1997-11-17 | 2000-10-03 | Lindauer Dornier Gesellschaft Mbh | Method and apparatus for cooling hot-pressed panels, especially wood chip and fiber panels |
DE19919822A1 (en) | 1999-05-01 | 2000-11-02 | Dieffenbacher Gmbh Maschf | Manufacture of continuous sheets of chipboard includes sudden cooling after bonding by passing between bands sprayed with water |
DE19926155A1 (en) | 1999-06-09 | 2000-12-14 | Dieffenbacher Gmbh Maschf | Wood and/or plastic based panel production by continuous hot pressing until the faces have hardened, transferring via a roll press to a double belt press and cooling at specific temperatures |
DE10205894A1 (en) * | 2002-02-13 | 2003-08-21 | Dieffenbacher Gmbh Maschf | Method and appliance for producing compressed material involve steel belts running over drive and deflector cylinders, with press bars |
DE102007021200A1 (en) * | 2007-05-05 | 2008-11-06 | Dieffenbacher Gmbh + Co. Kg | Pressed material mat compressing method for use during production of e.g. thin medium-density fiberboard plate, involves aerating pressed material mat across narrow surface, and pressing excessive air towards production direction on path |
Also Published As
Publication number | Publication date |
---|---|
AT14313U1 (en) | 2015-08-15 |
CN204382452U (en) | 2015-06-10 |
DE202011110527U1 (en) | 2014-07-07 |
DE102011089536A1 (en) | 2013-06-27 |
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