CN104389230B - A kind of paper calendering device - Google Patents
A kind of paper calendering device Download PDFInfo
- Publication number
- CN104389230B CN104389230B CN201410598256.7A CN201410598256A CN104389230B CN 104389230 B CN104389230 B CN 104389230B CN 201410598256 A CN201410598256 A CN 201410598256A CN 104389230 B CN104389230 B CN 104389230B
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- China
- Prior art keywords
- laser
- wrapped roll
- felt wrapped
- paper
- light leakage
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/0073—Accessories for calenders
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Abstract
The present invention relates to a kind of new type of paper calendering device, in described device, adopt laser as the heating source of page.Apparatus of the present invention adopt laser as the heating source of page, surface heating is carried out to the page entering calander nip, make to produce desirable thermograde on sheet thickness direction, then make concentration of plastic deformation on the sheet thickness direction after press polish on the surface of page, therefore the bulk of processed page can farthest be kept, this kind of radiant type mode of heating avoids conventional contact and adds the thermal contact resistance of hankering heating surface and page surface, thus can heat transfer efficiency be improved, this apparatus structure is compact, be swift in response, be easy to control.
Description
Technical field
The invention belongs to pulp technology for making paper, relate to the equipment of calendering operation in paper-making process, especially a kind ofly relate to the new type of paper calendering device using LASER HEATING to produce press polish after thermograde in paper web.
Background technology
At page, behaviour makes in process, in order to improve page surface performance, as smoothness and glossiness, and improving paper web transverse gage fluctuation etc., often need carry out calendering operation to paper.The calendering operation of paper is by applying certain pressure to paper, makes paper produce distortion in the thickness direction thereof.After pressure is removed, a paper distortion part is recovered, and another part will forever keep.This part is made the paper surface properties after press polish be improved by the distortion forever kept just, and transverse gage fluctuation is improved.If carry out calendering operation to page under the condition of samming, sam on sheet thickness direction, then the permanent deformation after press polish in page will be distributed in the thickness direction of page equably, and thus the thickness loss of page can be very large.And the thickness of page directly affects the intensity of page, as the deflection of paper is directly proportional to the cube of paper sheet thickness.In order to when ensureing paper physical intensity, reducing the consumption of fibrous raw material, the permanent deformation on sheet thickness direction must be made to only occur in the surface of paper as far as possible.
Because paper is formed primarily of string, and string is primarily of cellulose, hemicellulose and lignin three kinds of organic polymer compositions, these components all also exist vitrification point (N.L.Salm é nandE.L.Back under certain humidity, 1980, Tappi63 (6): 117-120), namely, when the vitrification point of its temperature higher than correspondence, it just can produce plastic deformation under very little ambient pressure.When utilizing this characteristic of sheet components can there is thermograde on paper sheet thickness direction, calendering operation is carried out to paper, make paper surface temperature higher than and internal temperature lower than the vitrification point of its component, thus plastic deformation only occurs in surface, to keep Paper bulk as far as possible under the prerequisite reaching expectation the calendaring effect.Conventional method uses deep fat as heating medium usually by inner hot roll.When page and hot-pressing roller surface contact, heat just flows to page through heat transfer by hot-pressing roller.In the process of page by nip, the thermograde on sheet thickness direction is formed gradually.But when the calender speed of a motor vehicle improves constantly or sheet thickness increases, nip length also must corresponding lengthening can have time enough to form effective thermograde by heat inflow page.On the one hand, by the restriction of felt wrapped roll diameter, nip length can not unrestrictedly lengthen; On the other hand, in the region that the entrance in long nip press is quite grown, be just subject to press polish process when page not yet sets up effective temperature gradient in the thickness direction thereof, thus thermograde press polish is not given full play to its advantage.
In addition, the traditional oils heating system that existing press polish uses exists takes up an area greatly, the shortcoming that system heating-cooling is slow; And the warm-up mill that the firing equipment use complex structure of existing press polish, cost are high, improves investment and production cost.
By retrieval, not yet find the patent publication us relevant to patent application of the present invention.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, a kind of compact conformation be provided, be swift in response, be easy to control, improve operating efficiency, can Novel hot calendering device without the need to using long nip press fully can use thermograde press polish theory on high speed calender.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of new type of paper calendering device, adopts laser as the heating source of page in described device.
And, described device comprises laser generator, laser dispersion device, level crossing, upper felt wrapped roll and lower felt wrapped roll, described upper felt wrapped roll and lower felt wrapped roll is upper and lower successively be arranged in parallel, this runs parallel between felt wrapped roll and lower felt wrapped roll paper web to be calendered, the input side of the paper web to be calendered of described upper felt wrapped roll sets gradually laser generator, laser dispersion device and level crossing along the traffic direction of paper web to be calendered, the high energy laser beam that laser generator produces is dispersed into linear laser through laser dispersion device, and this linear laser invests paper surface after flat mirror reflects.
And this device also comprises laser radiation cover and light leakage detector, described light leakage detector is arranged at the corresponding below place of the paper web at linear laser directive paper web place; Described laser radiation cover sealing is located at outside laser generator, laser dispersion device, level crossing, upper felt wrapped roll, lower felt wrapped roll and light leakage detector, and laser generator, laser dispersion device, level crossing, upper felt wrapped roll, lower felt wrapped roll and light leakage detector outer side seal surround therein by laser radiation cover.
And described device also comprises laser controller and break inspector, laser controller and laser generator are connected together; Described break inspector, light leakage detector are all connected together with laser controller respectively.
And, described device comprises laser generator, laser dispersion device, upper felt wrapped roll and lower felt wrapped roll, after the outer surface of described upper felt wrapped roll or lower felt wrapped roll carries out mirror process, the outer surface of upper felt wrapped roll or lower felt wrapped roll arranges specular layer, described upper felt wrapped roll and lower felt wrapped roll are gone up successively, under be arranged in parallel, this runs parallel between felt wrapped roll and lower felt wrapped roll paper web to be calendered, the input side of the paper web to be calendered of described upper felt wrapped roll sets gradually laser generator and laser dispersion device along the traffic direction of paper web to be calendered, the high energy laser beam that laser generator produces is dispersed into linear laser through laser dispersion device, this linear laser invests paper surface after the specular layer reflection of upper felt wrapped roll or lower felt wrapped roll.
And, the outer surface of described upper felt wrapped roll arranges specular layer.
And described device also comprises laser radiation cover and light leakage detector, described light leakage detector is arranged at the corresponding below place of the paper web at linear laser directive paper web place; Described laser radiation cover sealing is located at outside laser generator, laser dispersion device, upper felt wrapped roll, lower felt wrapped roll and light leakage detector, and laser generator, laser dispersion device, upper felt wrapped roll, lower felt wrapped roll and light leakage detector outer side seal surround therein by laser radiation cover.
And described device also comprises laser controller and break inspector, laser controller and laser generator are connected together; Described break inspector, light leakage detector are all connected together with laser controller respectively.
Advantage of the present invention and good effect are:
1, apparatus of the present invention adopt laser as the heating source of page, surface heating is carried out to the page entering calander nip, make to produce desirable thermograde on sheet thickness direction, then make concentration of plastic deformation on the sheet thickness direction after press polish on the surface of page, therefore the bulk of processed page can farthest be kept, this kind of radiant type mode of heating avoids conventional contact and adds the thermal contact resistance of hankering heating surface and page surface, thus can heat transfer efficiency be improved, this apparatus structure is compact, be swift in response, be easy to control.
2, apparatus of the present invention make page surface heat to occur in before page enters nip, when page enters nip, its thickness direction has formed effective thermograde, thus on high speed calender, also without the need to oversize, improve operating efficiency without the need to too large linear pressure, its nip length in its nip.
3, apparatus of the present invention adopt LASER HEATING, and firing rate regulates rapidly; When disconnected paper or when changing paper kind, can fast opening and closing heating system and regulate the intensity of projecting laser, easy to use.
4, apparatus of the present invention adopt LASER HEATING occupation of land little, and system heating-cooling is fast; Meanwhile, adopting the warm-up mill of LASER HEATING without the need to using complex structure, cost high, reducing investment and production cost.
5, the laser controller that apparatus of the present invention are arranged regulates the power of laser according to the ruuning situation of produced paper kind and paper machine, extremely easy to use; This device is also provided with break inspector, light leakage detector and laser radiation cover; ensure that the safe handling of laser; once light leakage detector detects light leak; such as, when there is the abnormal conditions such as disconnected paper in calendering operation process; or; when break inspector detects disconnected paper phenomenon, the power supply that namely laser controller controls laser generator is closed automatically, very big ensure that security.
Accompanying drawing explanation
Fig. 1 is the anatomical connectivity schematic diagram of the embodiment 1 of apparatus of the present invention;
Fig. 2 is the anatomical connectivity schematic diagram of the embodiment 2 of apparatus of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described; Following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
The equipment used in the present invention, if no special requirements, is equipment conventional in this area; The method used in the present invention, if no special requirements, is method conventional in this area.
Apparatus of the present invention adopt laser as the heating source of paper web, paper web is utilized to add thermal property to the blocking effect of laser penetration and laser to page compositional selecting, laser is made only to rest on the surface of paper web to the heating of paper web, thus, when paper web passes through nip subsequently, felt wrapped roll will be only limited to the region of paper surface temperature higher than fluxing point to the plastic deformation on the paper sheet thickness direction of page extruding generation, and other regions only will produce elastic deformation.After paper web leaves nip, elastic deformation will be recovered, and after making press polish process, the bulk of paper can remain on higher level, thus can realize thermograde press polish theory preferably.
A kind of new type of paper calendering device, as shown in Figure 1, in the present embodiment, comprise laser generator 2, laser dispersion device 4, level crossing 6, upper felt wrapped roll 7 and lower felt wrapped roll 9, described upper felt wrapped roll and lower felt wrapped roll are gone up successively, under be arranged in parallel, this runs parallel between felt wrapped roll and lower felt wrapped roll paper web 8 to be calendered, the input side of the paper web to be calendered of described upper felt wrapped roll sets gradually laser generator along the traffic direction of paper web to be calendered, laser dispersion device and level crossing, the high energy laser beam 3 that laser generator 2 produces is dispersed into linear laser 5 through laser dispersion device, this linear laser invests paper surface after flat mirror reflects, and be heat energy by paper surface sorption enhanced, thus paper surface temperature is raised.Because the nip that hot spot is formed from upper and lower felt wrapped roll is very close, and the speed of service of calender is very high, so the thermograde in paper, thickness direction produced because of surface laser heating can remain to paper web effectively pass through nip.So just can ensure that the technology of thermograde press polish theory realizes to greatest extent, thus making calendering operation reach optimal result: the plastic deformation in paper only occurs in the surface of paper, and paper surface smoothness, glossiness still can keep higher bulk while improving.
In the present embodiment, this device also comprises laser radiation cover 1 and light leakage detector 10, and described light leakage detector is arranged at the corresponding below place of the paper web at linear laser directive paper web place; Described laser radiation cover sealing is located at outside laser generator, laser dispersion device, level crossing, upper felt wrapped roll, lower felt wrapped roll and light leakage detector, and laser generator, laser dispersion device, level crossing, upper felt wrapped roll, lower felt wrapped roll and light leakage detector outer side seal surround therein by laser radiation cover.For the security of guarantee operation, prevent laser from leaking, be provided with light leak protective cover outside calendering device, and be provided with light leakage detector below paper web.Once light leak be detected, such as, when there is the abnormal conditions such as disconnected paper in calendering operation process, the power supply of laser generator can be closed automatically, very big ensure that security.
In the present embodiment, described device can also comprise laser controller and break inspector (not shown), laser controller and laser generator are connected together, and laser controller regulates the power of laser according to the ruuning situation of produced paper kind and paper machine; Described break inspector, light leakage detector are all connected together with laser controller respectively, ensure that the safe handling of laser, once light leakage detector detects light leak, such as, when there is the abnormal conditions such as disconnected paper in calendering operation process, or, when break inspector detects disconnected paper phenomenon, the power supply that namely laser controller controls laser generator is closed automatically, very big ensure that security.
Technology involved in present patent application is only descriptive, but is not limited to the embodiment on figure mono-.
As shown in Figure 2, in another embodiment of the invention, a kind of new type of paper calendering device, comprise laser generator 2, laser dispersion device 4, upper felt wrapped roll 7 and lower felt wrapped roll 9, after the outer surface of described upper felt wrapped roll or lower felt wrapped roll carries out mirror process, the outer surface of upper felt wrapped roll or lower felt wrapped roll arranges specular layer 6, in the present embodiment, upper felt wrapped roll has carried out mirror process, described upper felt wrapped roll and lower felt wrapped roll are gone up successively, under be arranged in parallel, this runs parallel between felt wrapped roll and lower felt wrapped roll paper web 8 to be calendered, the input side of the paper web to be calendered of described upper felt wrapped roll sets gradually laser generator and laser dispersion device along the traffic direction of paper web to be calendered, the high energy laser beam 3 that laser generator 2 produces is dispersed into linear laser 5 through laser dispersion device, this linear laser invests paper surface after the specular layer reflection of upper felt wrapped roll or lower felt wrapped roll, and be heat energy by paper surface sorption enhanced, thus paper surface temperature is raised.Because the nip that hot spot is formed from upper and lower felt wrapped roll is very close, and the speed of service of calender is very high, so the thermograde in paper, thickness direction produced because of surface laser heating can remain to paper web effectively pass through nip.So just can ensure that the technology of thermograde press polish theory realizes to greatest extent.Thus making calendering operation reach optimal result: the plastic deformation in paper only occurs in the surface of paper, and paper surface smoothness, glossiness still can keep higher bulk while improving.In the present embodiment, mirror process is carried out on a surface in upper felt wrapped roll or lower felt wrapped roll, such linear laser just can directly project on felt wrapped roll, thus makes laser at the hot spot of paper surface more close to nip, and thus thermograde piezooptical effect is more remarkable.
In the present embodiment, this device also comprises laser radiation cover 1 and light leakage detector 10, and described light leakage detector is arranged at the corresponding below place of the paper web at linear laser directive paper web place; Described laser radiation cover sealing is located at outside laser generator, laser dispersion device, upper felt wrapped roll, lower felt wrapped roll and light leakage detector, and laser generator, laser dispersion device, upper felt wrapped roll, lower felt wrapped roll and light leakage detector outer side seal surround therein by laser radiation cover.For the security of guarantee operation, prevent laser from leaking, be provided with light leak protective cover outside calendering device, and be provided with light leakage detector below paper web.Once light leak be detected, such as, when there is the abnormal conditions such as disconnected paper in calendering operation process, the power supply of laser generator can be closed automatically, very big ensure that security.
In the present embodiment, described device can also comprise laser controller and break inspector (not shown), laser controller and laser generator are connected together, and laser controller regulates the power of laser according to the ruuning situation of produced paper kind and paper machine; Described break inspector, light leakage detector are all connected together with laser controller respectively, ensure that the safe handling of laser, once light leakage detector detects light leak, such as, when there is the abnormal conditions such as disconnected paper in calendering operation process, or, when break inspector detects disconnected paper phenomenon, the power supply that namely laser controller controls laser generator is closed automatically, very big ensure that security.
With above-mentioned according to desirable case study on implementation of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on description, must determine its technical scope according to right.
Claims (8)
1. a paper calendering device, is characterized in that: adopt laser as the heating source of page in described device.
2. paper calendering device according to claim 1, it is characterized in that: described device comprises laser generator, laser dispersion device, level crossing, upper felt wrapped roll and lower felt wrapped roll, described upper felt wrapped roll and lower felt wrapped roll are gone up successively, under be arranged in parallel, this runs parallel between felt wrapped roll and lower felt wrapped roll paper web to be calendered, the input side of the paper web to be calendered of described upper felt wrapped roll sets gradually laser generator along the traffic direction of paper web to be calendered, laser dispersion device and level crossing, the high energy laser beam that laser generator produces is dispersed into linear laser through laser dispersion device, this linear laser invests paper surface after flat mirror reflects.
3. paper calendering device according to claim 2, is characterized in that: this device also comprises laser radiation cover and light leakage detector, and described light leakage detector is arranged at the corresponding below place of the paper web at linear laser directive paper web place; Described laser radiation cover sealing is located at outside laser generator, laser dispersion device, level crossing, upper felt wrapped roll, lower felt wrapped roll and light leakage detector, and laser generator, laser dispersion device, level crossing, upper felt wrapped roll, lower felt wrapped roll and light leakage detector outer side seal surround therein by laser radiation cover.
4. paper calendering device according to claim 3, it is characterized in that: described device also comprises laser controller and break inspector, laser controller and laser generator are connected together; Described break inspector, light leakage detector are connected together with laser controller respectively.
5. paper calendering device according to claim 1, it is characterized in that: described device comprises laser generator, laser dispersion device, upper felt wrapped roll and lower felt wrapped roll, after the outer surface of described upper felt wrapped roll or lower felt wrapped roll carries out mirror process, the outer surface of upper felt wrapped roll or lower felt wrapped roll arranges specular layer, described upper felt wrapped roll and lower felt wrapped roll are gone up successively, under be arranged in parallel, this runs parallel between felt wrapped roll and lower felt wrapped roll paper web to be calendered, the input side of the paper web to be calendered of described upper felt wrapped roll sets gradually laser generator and laser dispersion device along the traffic direction of paper web to be calendered, the high energy laser beam that laser generator produces is dispersed into linear laser through laser dispersion device, this linear laser invests paper surface after the specular layer reflection of upper felt wrapped roll or lower felt wrapped roll.
6. paper calendering device according to claim 5, is characterized in that: the outer surface of described upper felt wrapped roll arranges specular layer.
7. the paper calendering device according to claim 5 or 6, is characterized in that: described device also comprises laser radiation cover and light leakage detector, and described light leakage detector is arranged at the corresponding below place of the paper web at linear laser directive paper web place; Described laser radiation cover sealing is located at outside laser generator, laser dispersion device, upper felt wrapped roll, lower felt wrapped roll and light leakage detector, and laser generator, laser dispersion device, upper felt wrapped roll, lower felt wrapped roll and light leakage detector outer side seal surround therein by laser radiation cover.
8. paper calendering device according to claim 7, it is characterized in that: described device also comprises laser controller and break inspector, laser controller and laser generator are connected together; Described break inspector, light leakage detector are all connected together with laser controller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410598256.7A CN104389230B (en) | 2014-10-30 | 2014-10-30 | A kind of paper calendering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410598256.7A CN104389230B (en) | 2014-10-30 | 2014-10-30 | A kind of paper calendering device |
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| Publication Number | Publication Date |
|---|---|
| CN104389230A CN104389230A (en) | 2015-03-04 |
| CN104389230B true CN104389230B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410598256.7A Expired - Fee Related CN104389230B (en) | 2014-10-30 | 2014-10-30 | A kind of paper calendering device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108385427A (en) * | 2018-04-28 | 2018-08-10 | 重庆川之舟印务设计有限公司 | Paper pressuring flat device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4653395A (en) * | 1984-12-31 | 1987-03-31 | Valmet Oy | Method and apparatus in the calendering of a web |
| WO2000040798A1 (en) * | 1998-12-30 | 2000-07-13 | The Goodyear Tire & Rubber Company | Heating of calender roll surfaces |
| EP1777343A1 (en) * | 2005-10-19 | 2007-04-25 | Voith Patent GmbH | Calender |
| CN102066654A (en) * | 2008-04-30 | 2011-05-18 | 希乐克公司 | Paper product and method and system for manufacturing the same |
| DE102012209291A1 (en) * | 2012-06-01 | 2013-12-05 | Metso Paper, Inc. | Calender e.g. multi nip calender has protective curtain in nip that is configured to shield change and maintain counter roll against heat emitted by thermo roll |
-
2014
- 2014-10-30 CN CN201410598256.7A patent/CN104389230B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4653395A (en) * | 1984-12-31 | 1987-03-31 | Valmet Oy | Method and apparatus in the calendering of a web |
| WO2000040798A1 (en) * | 1998-12-30 | 2000-07-13 | The Goodyear Tire & Rubber Company | Heating of calender roll surfaces |
| EP1777343A1 (en) * | 2005-10-19 | 2007-04-25 | Voith Patent GmbH | Calender |
| CN102066654A (en) * | 2008-04-30 | 2011-05-18 | 希乐克公司 | Paper product and method and system for manufacturing the same |
| DE102012209291A1 (en) * | 2012-06-01 | 2013-12-05 | Metso Paper, Inc. | Calender e.g. multi nip calender has protective curtain in nip that is configured to shield change and maintain counter roll against heat emitted by thermo roll |
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| Publication number | Publication date |
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| CN104389230A (en) | 2015-03-04 |
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