CN102704314B - The dry reverse forming net device of special paper of inverse net multiple roll at a high speed - Google Patents
The dry reverse forming net device of special paper of inverse net multiple roll at a high speed Download PDFInfo
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- CN102704314B CN102704314B CN201210189649.3A CN201210189649A CN102704314B CN 102704314 B CN102704314 B CN 102704314B CN 201210189649 A CN201210189649 A CN 201210189649A CN 102704314 B CN102704314 B CN 102704314B
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Abstract
Chinese assistant is applicable at a high speed the paper machine of a kind of tissue paper against the dry special paper of net multiple roll, especially specially for the manufacture of base paper for excursion press mark and decorating base paper, the dry special paper forming net device of inverse net multiple roll adopts reverse running at a high speed, described forming net device (210) comprising: forming board (213), Wiper blade (214), water suction case (215) and forming net (219). Most hardwood pulps relatively good for printing adaptability are mainly manufactured on the front of paper page by the present invention, and softwood pulp is manufactured on the reverse side of paper page.
Description
Technical field
The present invention relates to a kind of papermaking equipment field. Especially a kind of manufacture tissue machine. The high speed particularly manufacturing base paper for excursion press mark and decorating base paper is against the dry reverse forming net device of special paper of net multiple roll.
Background technology
Base paper for excursion press mark is a kind of industrial paper, is mainly used in the transfering printing process of textiles. First various decorative pattern, pattern, color are printed on base paper for excursion press mark; Then by being printed on decorative pattern, the base paper for excursion press mark of pattern closely contact with fabric, when controlling certain temperature, pressure and time, dyestuff is transferred to fabric from calico paper, then enters fabric through diffusion, thus reaches painted object.
In transfer printing process, first pattern, decorative pattern are printed on base paper for excursion press mark, and then it is transferred to cloth surface by base paper for excursion press mark, especially in transfer process below, pattern to be kept the characteristics such as flower-shape is true to nature, decorative pattern is careful, clear layer, stereoscopic sensation are strong, and the requirement of base paper for excursion press mark performance is compared high by this.
Decorating base paper is widely used in furnishing fields. Such as desk, furniture etc. Needing in application to paste the patterns such as the wood grain that prints on decorating base paper surface, the quality of decorating base paper and printing performance decide the pattern degree true to nature such as the wood grain of furniture.
In sum, base paper for excursion press mark and decorating base paper require not only quality of finished paper requirement height, and print and transfer performance also require height. Its physicals is specifically:
(1) require that paper page has enough intensity. Paper surface does not fall hair, does not fall powder. In printing and transfer process, there is certain tension force in paper, speed is more fast, and tension force is more big, therefore it is required that paper has enough intensity.
(2) very high smoothness is required. Only smoothness height, printing effect is good, especially base paper for excursion press mark and decorating base paper, if because base paper for excursion press mark smoothness is poor, makes the dye sublimation rate on paper inconsistent. Therefore, transfer to and cloth also can become fuzzy.
According to above requirement, producing base paper for excursion press mark should need softwood pulp to become according to certain proportioning with hardwood pulp with decorating base paper, and require that overwhelming majority hardwood pulp is on top layer, overwhelming majority softwood pulp is at bottom, so just can printing better effects if during transfer, smoothness reaches more than 1000 seconds.(reference Fang Hanzuo regenerates the production of base paper for excursion press mark and applies [J]. Shanghai papermaking, 1999 (3): 13)
At present, general paper machine is all adopted at manufacture base paper for excursion press mark, it is very difficult to reach requirement. Existing technology, production efficiency is low, and manufacturing cost is corresponding too high, and quality product is difficult to reach market requirement.
Fig. 1 is existing paper machine schematic diagram, and existing paper machine comprises: frame 104, forming section 101, press part 102, dryer part 103 and batch portion 109. Wherein forming section 101 comprises head box 111, chest roller 112, suction couch roll 117, forming board 113, Wiper blade 114, water suction case 115 and forming net 119. Described forming net 119 is by chest roller 112, the member supporting such as suction couch roll 117 and deflector roll, and centre is provided with forming board 113, Wiper blade 114 and water suction case 115. Described head box 111 is located at chest roller 112 near-end. Dryer part 103 comprises drying cylinder 147 and lower drying cylinder 107, and lower drying cylinder 107 is located at drying cylinder 147 and batches between portion 109, lower drying cylinder 107 and batch and be also provided with soft calendaring 105 between portion 109.
In paper-making process, forming section 101 is the process of drainage and formation, and by a large amount of research and practices, we find to the more important thing is a process precipitated. So in forming process, overwhelming majority softwood pulp is deposited in the bottom of paper 126, otherwise, overwhelming majority hardwood pulp is on the top layer of paper 126. Adopt the paper manufactured by existing general paper machine be overwhelming majority softwood pulp in front, and the relatively good most hardwood pulps of printing adaptability are at reverse side.
Although it is not very big that the smoothness of reverse side and glossiness are required by the tissue paper such as base paper for excursion press mark and decorating base paper, but the too low smoothness that can directly affect front in batching of the smoothness of reverse side. So existing technology is provided with lower drying cylinder 107 and soft calendaring 105 facility after paper 126 goes out drying cylinder 147. Need to consume a large amount of steam and electric energy. Especially soft calendaring 105, it is necessary to the steam of 0.4Mpa and two drive station, it is necessary to two driven by motor.
In sum, the one-tenth paper 106 manufactured by existing paper machine be softwood pulp in front, and the relatively good hardwood pulp of printing adaptability is at one-tenth paper 106 reverse side. Thus printing effect and the transfer effect having influence on ink, more notably, can lower the gloss of printing, make ink seem, color is bright-coloured not waits printing defects. Lower drying cylinder 107 and soft calendaring 105 facility, energy consumption is big, carbon monoxide and CO2 emissions is big waits deficiency. Therefore, solve production efficiency low, reduce energy consumption, advocate cleaning low carbon and produce, it is to increase quality product, has become the actual needs of production.
Summary of the invention
For the above-mentioned deficiency in prior art, the technical problem to be solved in the present invention is to provide a kind of manufacture reverse forming net device of tissue machine. Especially the Chinese assistant dry reverse forming net device of special paper of inverse net multiple roll at a high speed of base paper for excursion press mark and decorating base paper is manufactured.
As shown in Figure 2, the technical solution adopted for the present invention to solve the technical problems is: Chinese assistant comprises frame 204, forming section 201, press part 202, dryer part 203 against the dry special paper of net multiple roll and batches portion 209 at a high speed.
Described forming section 201 comprises head box 211, chest roller 212, suction couch roll 217 and reverse forming net device 210. Described head box 211 is arranged on described chest roller 212 near-end, and is arranged between described chest roller 212 and described dryer part.Described forming net device 210 comprises forming board 213, Wiper blade 214, water suction case 215 and forming net 219. Described forming net 219 is by comprising chest roller 212, and suction couch roll 217 and deflector roll are in interior multiple member supporting, and centre is provided with forming board 213, Wiper blade 214 and water suction case 215. The rotation direction of described forming net device 210 is contrary with complete machine rotation direction, so being referred to as reverse forming net device.
Described press part 202 adopts the pressing device 220 of three roller two nips, the pressing device 220 of described three roller two nips comprises pressure roller 223, vacuum roller 221, plain-barreled roll 222, vacuum roller 221 and plain-barreled roll 222 are applied pressure by pressure roller 223 simultaneously, wherein first is vacuum roller 221, and second is plain-barreled roll 222, and pressure roller 223 is held concurrently and done later roller effect.
Described dryer part 203 comprises half wet woollen blanket device 230, drying cylinder 247 and multiple roll drying installation 240.
Described half wet woollen blanket device 230 comprises, and moisture content accounts for the glazing felt 238 that woollen blanket gross weight is 40% (weight percent), and drip washing device 231, water suction case 235, the dry baby dryer 237 of glazing felt 238 and vacuum suction device 234. Described moisture content is the glazing felt 238 of 40% (weight percent) is be located at dryer part 203 to be used for carrying and carrying paper 226, and the washing device 231 that drips is used to wash the device of glazing felt 238. Described water suction case 235 has two groups, often organize at least one water suction case, first group is woollen blanket front water suction case, 2nd group is woollen blanket reverse side water suction case, described woollen blanket front water suction case 235 is the device residue on glazing felt 238 and moisture content siphoned away, described woollen blanket reverse side water suction case 235 is the water absorber for glazing felt 238 reverse side, and the moisture content also not evaporated when mainly being heated by dry for glazing felt baby dryer 237 siphons away.
Described drying cylinder 247 is dried by paper 226 by the mode of heating, makes paper 226 drying become the device of paper 206.
Described multiple roll drying installation 240 is included in around drying cylinder 247 according to different angles to be provided with the mechanism that exerts pressure of multiple dryer roll and respective dryer roll. The described mechanism that exerts pressure is according to need of production, is exerted pressure by respective dryer roll thus the device exerted pressure by drying cylinder 247.
Also being provided with printing performance at dryer part 203 and adapt to agent bringing device 208, described printing performance adapts to agent bringing device 208 and is used to paper page 249 adds the device that printing performance adapts to agent 299. The sick online detection and control system 290 of paper also it is provided with between portion 209 at drying cylinder 247 and batching.
1. reverse forming net device 210 described in, its rotation direction is contrary with complete machine rotation direction. Paper machine divides right hand machine and right hand machine according to rotation direction, and Fig. 2 is right hand machine application example of the present invention. As shown in Figure 2: paper pulp 216 defines paper 226 on reverse forming net device 210, after pressing device 220 is aspirated by vacuum suction roller 234, it is dry that glazing felt 238 is transported to drying cylinder 247 place. By just so anti-, making overwhelming majority hardwood pulp in the front becoming paper 206, overwhelming majority softwood pulp is at the back side becoming paper 206.
2. press part 202 adopts the pressing device 220 of three roller two nips. The pressing device 220 of described three roller two nips, it is characterised in that first is vacuum roller 221, second is plain-barreled roll squeezing 222. Vacuum roller 221 is known well than the dehydrating effect of plain-barreled roll 222. But have suction press eye portion with do not have suction press eye portion dehydration inconsistent, cause on become paper 206 impact. By the application of the pressing device 220 of three roller two nips, reach paper width moisture content completely the same, improve tight degree and the mass dryness fraction of paper 226 simultaneously.Press part 202 often improves the mass dryness fraction of 1%, it is possible to reducing the burden of drying cylinder 247 at least 4%, that is press part 202 often improves the mass dryness fraction of 1%, and dryer part 203 can improve at least 4% optimum dry speed of a motor vehicle, and economize on coal is more than 4% simultaneously. Thus improve production efficiency, and saved the energy, reduce the quantity discharged of carbon monoxide and carbonic acid gas.
3. it is provided with half wet woollen blanket device 230 and multiple roll drying installation 240 at dryer part 203. Described half wet woollen blanket device 230 is by existing for dryer part 203 glazing felt 238, go out two roads water suction casees 235 through the dry baby dryer 237 of drip washing device 231 and glazing felt, enter the glazing felt 238 of the moisture control before a carrying roller 241 in 40% (weight percent) left and right. The dry baby dryer 237 of described glazing felt adopts the big flash steam of drying cylinder 247 and the water of condensation of discharge as temperature rise material, and does not want drive station.
4. multiple roll drying installation 240 described in, according to different angles cloud cloth around drying cylinder 247, and executes stressed device by the mechanism that exerts pressure separately to drying cylinder 247. The moisture content of paper 226 is about 68% under normal circumstances, the application of the pressing device 220 of three roller two nips, the moisture content of paper 226 is about 64%, owing to the moisture content of glazing felt 238 is 40% (weight percent) left and right, so under the linear pressure of a carrying roller 241, the moisture content of paper 226 infiltrates in glazing felt 238 and takes away, and can not overflow from the line nip of a carrying roller 241. So a carrying roller 241 can any position around drying cylinder 247, be proven, the vertical direction eccentric angle at itself and drying cylinder 247 center is 10 ��-80 ��, and deflection drying cylinder 247 rotates opposite direction side, it is preferable that 45 ��-65 ��, the best is 55 ��. Paper 226 is exerted pressure by carrying roller 241 in advance, paper 226 the angle of coated drying cylinder 247 improve about 60 ��, it is possible to improve the efficient drying area about about 26% of drying cylinder 247. The optimum dry speed of a motor vehicle more than 26% can be improved. Reduce ton paper consumption coal on year-on-year basis more than at least 26%. Thus improve production efficiency, save the energy, reduce the quantity discharged of carbon monoxide and carbonic acid gas.
5. before paper 226 enters a carrying roller 241, moisture content is still very high, water content is about 68%, so the water evaporates amount of paper 226 is big when a carrying roller 241, after paper 226 goes out a carrying roller 241, paper 226 is had stronger surging force by a large amount of water vapour between drying cylinder 247 and paper 226, now paper 226 declines greatly with the degree of pasting of drying cylinder 247, if when a carrying roller 241, paper 226 is set to 100 with the degree of pasting of drying cylinder 247, when entering two carrying rollers 242, its degree of pasting is approximately about 70, under the linear pressure of two carrying rollers 242, the degree of pasting of paper 226 and drying cylinder 247 is made to bring up to again 100. owing to paper 226 is when a carrying roller 241, its moisture content is higher than glazing felt 238, and the moisture content of paper 226 penetrates in glazing felt 238. same before entering three carrying rollers 243, paper 226 drops to again about 70 with the degree of pasting of drying cylinder 247, and under the linear pressure of three carrying rollers 243, the degree of pasting of paper 226 and drying cylinder 247 brings up to 100 again. effectively improve the drying effect of drying cylinder 247.
6. smooth carrying roller 244 material is rubber roll, its not coated woollen blanket, under the linear pressure of the 700N/cm of light carrying roller 244, effectively eliminates the felt mark on paper 226 reverse side, more effectively improves smoothness and the glossiness in paper 226 front. Reach the equivalent effect of lower drying cylinder 107, therefore without the need to re-using lower drying cylinder 107.Under the linear pressure of light carrying roller 244, again improve degree of pasting to 100, it is to increase the drying power of drying cylinder. Effectively improve the speed of a motor vehicle.
7. the not coated woollen blanket of optical press roll 245, when paper 226 enters optical press roll 245, its moisture content about about 11%, has now shaped substantially, so being called paper page 246. Drying cylinder 247 surperficial as bright as a sixpence, under the linear pressure of optical press roll 245, when paper page 246 goes out optical press roll 245, the moisture content of paper page 246 about about 8%, therefore the smoothness of paper page 246, glossiness, tight degree improve greatly, and the fibrous tissue of paper page 246 is tightr, tear-resistant degree etc. all improves a lot, the physicals of paper page 246 has the raising of matter, has exceeded the effect of soft calendaring 105, thus existing follow-up soft calendaring 105 device is equally without the need to re-using. Again reach the effect of energy-saving and emission-reduction.
The invention has the beneficial effects as follows:
1, paper 226 is by after reverse forming net device 210 and reverse running pressing device 220, the effect obtained is just anti-, it is upper dry that the hardwood pulp face of paper 226 is attached to drying cylinder 247, paper manufactured by reverse forming net device 210 paper machine be the overwhelming majority hardwood pulp in paper 206 front, and the overwhelming majority softwood pulp in reverse side of paper. The printing adaptability of hardwood pulp can be good. The overwhelming majority is the one-tenth paper 206 that hardwood pulp paper 226 face becomes front, it is to increase printing effect and transfer effect.
2, the application of the pressing device 220 of three roller two nips, it is possible to effectively improve into the quality of paper 206, improves tight degree and the mass dryness fraction of paper 226 simultaneously. The pressing device 220 of three roller two nips, compared with common squeezing, can improve the mass dryness fraction of 5% at press part 202, it is possible to reduces the burden of drying cylinder 247 at least 20%, and dryer part 203 can improve at least 20% optimum dry speed of a motor vehicle, economizes on coal more than at least 20% simultaneously.
3, the application of half wet woollen blanket device 230 and multiple roll drying installation 240, it is possible to saving lower drying cylinder 107 and soft calendaring 105, only soft calendaring 105 is 2 drive station, by 2 driven by motor, adds the steam of 0.4Mpa air pressure, and steam accounts for about the 30% of complete machine consumption. Two motors account for total output load 20%. Drying cylinder 247 useful area increases by 26%, in theory, the speed of a motor vehicle more than 26% can be improved, in fact, by the effect of half wet woollen blanket device 230, it is possible to realize fast dewatering, just can improve the speed of a motor vehicle 10%, the application of multiple carrying roller, it is to increase the degree of pasting of paper 226 and drying cylinder 247, thus improve the drying effect of drying cylinder 247. The speed of a motor vehicle 15% can be improved. The present invention only can bring up to 1.6 times of speed of a motor vehicle on year-on-year basis in this part. Steam can save 39% and consume coal accordingly on year-on-year basis, consumption water and power consumption. Power load can save the power consumption of 18%, and the speed of a motor vehicle brings up to 1.6 times on year-on-year basis, herein ton paper integrated power-saving 55% on year-on-year basis, and water saving 29%, economizes on coal 39%. Improve into smoothness and the glossiness of paper 206, quantitatively tight degree. Thrown the one-tenth paper 206 expecting to try to copy by detection, smoothness reaches about 1100 seconds.
4. the at a high speed complete machine comprehensive energy consumption of the dry special paper of inverse net multiple roll and existing paper machine and manufacture paper with pulp ability on year-on-year basis: improving the optimum drying speed of a motor vehicle is existing 1.9 times. Ton paper integrated power-saving 65% on year-on-year basis, water saving 35%, economizes on coal 45%.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is existing paper machine schematic diagram.
Fig. 2 is at a high speed against the dry special paper schematic diagram of net multiple roll.
Fig. 3 is the operation schematic diagram of the present invention.
Embodiment
The present invention is the example adopting right hand machine, and the practical range of unrestricted the present invention, all equivalences done according to the structure described in the present patent application patent scope, feature and principle change or modify, and all should be included in the present patent application patent scope.
As shown in Figure 3: a kind of dry reverse forming net device 210 of special paper of inverse net multiple roll at a high speed, reverse forming net device 210 comprises forming board 213, Wiper blade 214, water suction case 215 and forming net 219. Described forming net 219 is by comprising chest roller 212, and suction couch roll 217 and deflector roll are in interior multiple member supporting, and centre is provided with forming board 213, Wiper blade 214 and water suction case 215. The rotation direction of described forming net device 210 is contrary with complete machine rotation direction, so being referred to as reverse forming net device.
We are for the ease of understanding, and we are in the drawings with the direction representing softwood pulp and hardwood pulp of " E ". The one side closed represents hardwood pulp, and the one side of opening represents softwood pulp. The direction of arrow in figure is exactly rotation direction or working direction.
Paper pulp is evenly unanimously injected on forming net 219 with suitable width, angle, speed, flow by head box 211, and described forming net 219 rotation direction is operate according to the direction of arrow mutually. Paper 226 is when forming net, " E's " is opening down, represent hardwood pulp upper softwood pulp under, after paper 226 enters lower woollen blanket 218, enter pressing device 220 with transporting felt 228 to dewater simultaneously, after going out pressing device 220, paper 226 departs from lower woollen blanket 218, operates with transporting felt 228. Now, " E's " is opening up, represent the overwhelming majority hardwood pulp under, the overwhelming majority softwood pulp upper. After vacuum suction roller 234 aspirates, paper 226 operates with glazing felt 238, upwards runs with deflector roll, and now, the opening of " E ", towards glazing felt 238, represents that overwhelming majority softwood pulp is being attached on glazing felt 238, and overwhelming majority hardwood pulp is outwardly. Last paper 226 contacts with drying cylinder 247 under the effect of carrying roller 241, is dried. Now, " E's " is opening down, represent the overwhelming majority hardwood pulp upper, the overwhelming majority softwood pulp under.
Thus realizing overwhelming majority hardwood pulp on paper 226 top layer, overwhelming majority softwood pulp is at paper 226 bottom, and the better effects if when printing transfer, smoothness reaches about 1100 seconds.
Claims (2)
1. a high speed is against the dry reverse forming net device of special paper of net multiple roll, described reverse forming net device is provided with head box (211), chest roller (212), suction couch roll (217) and forming net device (210); Described forming net device (210) comprising: forming board (213), Wiper blade (214), water suction case (215) and forming net (219); It is characterized in that the rotation direction of described forming net device (210) is contrary with complete machine rotation direction; Described head box is located between described chest roller (212) and dryer part (203); Described forming net device is located between described head box and press part, paper pulp (216) defines paper width (226) on described forming net device, through pressing device, then aspirated by vacuum suction roller (234), press part adopts the pressing device of three roller two nips, after vacuum suction roller (234) aspirates, hardwood pulp is becoming the front of paper (206); Paper width is when forming net, " E's " is opening down, described " E " is the direction of softwood pulp and hardwood pulp, the one side closed represents hardwood pulp, the one side of opening represents softwood pulp, after paper width enters lower woollen blanket, enters pressing device with transporting felt simultaneously and dewaters, after going out pressing device, paper width departs from lower woollen blanket, operates with transporting felt;Now, " E's " is opening up, represent the overwhelming majority hardwood pulp under, the overwhelming majority softwood pulp upper, after vacuum suction roller aspirates, paper width operates with glazing felt, upwards running with deflector roll, now, the opening of " E " is towards glazing felt (238), representing that overwhelming majority softwood pulp is attached on glazing felt (238), overwhelming majority hardwood pulp is outwardly; Last paper width (226) contacts with drying cylinder (247) under the effect of carrying roller (241), is dried, and now, " E's " is opening down, represent the overwhelming majority hardwood pulp upper, the overwhelming majority softwood pulp under; Described dryer part (203) comprises half wet woollen blanket device (230), drying cylinder (247) and multiple roll drying installation (240); Described half wet woollen blanket device (230) comprises moisture content and accounts for the glazing felt (238) that woollen blanket gross weight is 40% (weight percent), drip washing device (231), water suction case (235), the dry baby dryer (237) of glazing felt (238) and vacuum suction roller (234).
2. high speed according to claim 1 is against the dry reverse forming net device of special paper of net multiple roll, it is characterized in that described forming net (219) is by comprising chest roller (212), suction couch roll (217) and deflector roll are in interior multiple member supporting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210189649.3A CN102704314B (en) | 2012-06-08 | 2012-06-08 | The dry reverse forming net device of special paper of inverse net multiple roll at a high speed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210189649.3A CN102704314B (en) | 2012-06-08 | 2012-06-08 | The dry reverse forming net device of special paper of inverse net multiple roll at a high speed |
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| Publication Number | Publication Date |
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| CN102704314A CN102704314A (en) | 2012-10-03 |
| CN102704314B true CN102704314B (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210189649.3A Active CN102704314B (en) | 2012-06-08 | 2012-06-08 | The dry reverse forming net device of special paper of inverse net multiple roll at a high speed |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107385988B (en) * | 2017-07-20 | 2023-09-26 | 华南理工大学 | Composite paper sheet former and dehydration method thereof |
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| CN87102984A (en) * | 1987-04-25 | 1988-03-30 | 宋大兴 | Horizontally arranged multiple fourdrinier paper machine |
| CN88201313U (en) * | 1988-02-12 | 1988-09-07 | 宋大兴 | Wet press of paper-making machines |
| CN2044614U (en) * | 1989-03-14 | 1989-09-20 | 宋大兴 | Single-or double-long net paper making machine with single cylinder |
| CN1045286A (en) * | 1989-03-01 | 1990-09-12 | 宋大兴 | Multiple long net full sealed paper making machine |
| CN1112622A (en) * | 1993-07-15 | 1995-11-29 | 三菱重工业株式会社 | Apparatus for forming layered paper |
| CN202744879U (en) * | 2012-06-08 | 2013-02-20 | 方汉佐 | Reverse forming net device for high-speed reverse net multi-roll drying special papermaking machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7510630B2 (en) * | 2005-04-20 | 2009-03-31 | Albany International Corp. | Extended couch nip on cylinder former |
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2012
- 2012-06-08 CN CN201210189649.3A patent/CN102704314B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102984A (en) * | 1987-04-25 | 1988-03-30 | 宋大兴 | Horizontally arranged multiple fourdrinier paper machine |
| CN88201313U (en) * | 1988-02-12 | 1988-09-07 | 宋大兴 | Wet press of paper-making machines |
| CN1045286A (en) * | 1989-03-01 | 1990-09-12 | 宋大兴 | Multiple long net full sealed paper making machine |
| CN2044614U (en) * | 1989-03-14 | 1989-09-20 | 宋大兴 | Single-or double-long net paper making machine with single cylinder |
| CN1112622A (en) * | 1993-07-15 | 1995-11-29 | 三菱重工业株式会社 | Apparatus for forming layered paper |
| CN202744879U (en) * | 2012-06-08 | 2013-02-20 | 方汉佐 | Reverse forming net device for high-speed reverse net multi-roll drying special papermaking machine |
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| CN102704314A (en) | 2012-10-03 |
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