FI92738C - Belt - Google Patents
Belt Download PDFInfo
- Publication number
- FI92738C FI92738C FI903569A FI903569A FI92738C FI 92738 C FI92738 C FI 92738C FI 903569 A FI903569 A FI 903569A FI 903569 A FI903569 A FI 903569A FI 92738 C FI92738 C FI 92738C
- Authority
- FI
- Finland
- Prior art keywords
- press
- belt
- base fabric
- nip
- belt according
- Prior art date
Links
- 239000004744 fabric Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000002952 polymeric resin Substances 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000009877 rendering Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 230000032798 delamination Effects 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229940098465 tincture Drugs 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/0209—Wet presses with extended press nip
- D21F3/0218—Shoe presses
- D21F3/0227—Belts or sleeves therefor
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/0027—Screen-cloths
- D21F1/0036—Multi-layer screen-cloths
Landscapes
- Paper (AREA)
- Color Printing (AREA)
- Sheet Holders (AREA)
- Woven Fabrics (AREA)
- Installation Of Indoor Wiring (AREA)
- Multi-Conductor Connections (AREA)
Description
92738 ΗΙΗΝΑ92738 ΗΙΗΝΑ
Keksinnon kohteena on patenttivaatimuksen 1 johdanto-osassa mååritelty hihna.The invention relates to a belt as defined in the preamble of claim 1.
5 Keksinndn kohteena on mekanismi veden poista- miseksi materiaalirainasta ja erityisemmin kuituisesta rainasta, josta tehdåån paperituotetta paperikoneessa. Erityisesti keksintonå on tiivis hihna suunniteltuna kåytettåvåksi paperikoneen pitkånippipuristimen yh-10 teydesså.The invention relates to a mechanism for removing water from a web of material and more particularly from a fibrous web from which a paper product is made in a paper machine. In particular, the invention provides a tight belt designed for use with a paper machine long nip press.
Paperintekoprosessissa kuituinen raina muodos-tetaan muodostusviiralle asettamalla sen paaile kuituinen massa. Suuri maara vettå poistuu massasta tasså prosessissa, jonka jålkeen vasta muodostettu raina 15 jatkaa puristinosaan. Puristinosaan kuuluu sarja puris-tinnippejå, joissa kuituiseen rainaan kohdistetaan puristavia voimia poistamalla siitå vettå. Lopulta raina jatkaa kuivatusosaan, johon kuuluu låmmitettaviå kuivatusrumpuja, joiden ymparille raina ohjataan. Lam-20 mitettavat kuivausrummut vMhentMvåt rainan vesipitoi-suuden halutulle tasolle haihduttamalla.In the papermaking process, a fibrous web is formed on a forming wire by placing it on a fibrous pulp. A large amount of water is removed from the pulp in this process, after which the newly formed web 15 continues into the press section. The press section includes a series of press nips in which pressing forces are applied to the fibrous web by removing water therefrom. Eventually, the web continues to a drying section that includes heated drying drums around which the web is guided. Lam-20 measurable dryers reduce the water content of the web to the desired level by evaporation.
Kohonneet energiakustannukset ovat tehneet yha haluttavammaksi poistaa niin paljon vettå rainasta kuin mahdollista ennen sen saapumista kuivausosaan. Kuivaus-25 rumpuja usein låmmitetåån sisåpuolelta hdyryllå ja ·* kustannukset voivat olla merkittåvåt erityisesti sil- loin, kun rainasta tåytyy poistaa suuret mååråt vettå.Increased energy costs have made it increasingly desirable to remove as much water from the web as possible before it enters the drying section. Drying drums are often heated internally by steam and the cost can be significant, especially when large amounts of water need to be removed from the web.
Perinteisesti puristinosat koostuvat sarjasta nippejå, jotka muodostuvat vierekkåisistå sylinterimåi-30 sistå puristintelapareista. Viimeaikoina pidennettyjen puristusnippien kåytto on havaittu edulliseksi verrat-tuna vierekkåisistå telapareista koostuviin nippeihin. Mitå kauemmin rainaan vaikuttaa puristus nipisså, sitå enemmån vettå siitå voidaan poistaa ja edelleen sitå 35 våhemmån vettå jåå rainaan poistettavaksi haihduttamalla kuivatusosassa.Traditionally, press sections consist of a series of nips formed by adjacent press rolls of cylinders. Recently, the use of extended press nips has been found to be advantageous over nips consisting of pairs of adjacent rollers. The longer the web is subjected to compression in the nip, the more water can be removed therefrom and further less water remains in the web to be removed by evaporation in the drying section.
Tåmå keksinto kohdistuu kenkåtyyppiseen pit- ---- ___________ 92738 2 kånippipuristimeen. Taman tyyppisesså pitkånippipuris-timessa nippi muodostuu sylinterimåisen puristintelan ja kaarevan puristinkengan våliin. Viimeksi mainitulla on sylinterimåinen kovera pinta, jonka kaarevuussåde on 5 låhellå sylinterimaisen puristintelan kaarevuussådettå.The present invention relates to a shoe-type longitudinal ---- ___________ 92738 2 cam nip press. In this type of long nip press, the nip is formed between a cylindrical press roll and a curved press shoe. The latter has a cylindrical concave surface with a radius of curvature close to the radius of curvature of the cylindrical press roll.
Kun tela ja kenkå tuodaan låheiseen kosketukseen, muodostuu nippi, joka voi olla viidesta kymmeneen kertaa pidempi koneensuunnassa kuin kahden puristintelan våliin muodostuva nippi. Tåmå lisåå kuituisen rainan 10 oloaikaa pidennetysså nipisså såilyttåen saman puris-tustason pinta-alayksikkoå kohti kuin kaksitelapuristi-messa. Tuloksena tåstå uudesta pitkånippiteknologiasta on ollut merkittåvå kuituisen rainan vedenpoiston li-sååntyminen pitkassa nipisså verrattuna perinteisiin 15 nippeihin paperikoneissa.When the roll and the shoe are brought into close contact, a nip is formed, which may be five to ten times longer in the machine direction than the nip formed between the two press rolls. This increases the residence time of the fibrous web 10 in the extended nip, maintaining the same compression level per unit area as in the twin roll press. As a result of this new long nip technology, there has been a significant increase in the dewatering of the fibrous web in the long nip compared to traditional nips in paper machines.
Kenkåtyyppinen pitkånippipuristin vaatii eri-tyisen hihnan, kuten sellaisen kuin on kuvattu kanada-laisessa patentissa 1 188 556. Tåmå hihna on suunni-teltu suojaamaan kuituista rainaa tukevaa, kuljettavaa 20 ja kuivaavaa puristinkangasta kiihtyvåltå kulumiselta, joka olisi seurauksena suorasta liukuvasta kontaktista kiinteån puristinkengån kanssa. Tållainen hihna on tehtåvå tasaiseksi låpåisemåttomåksi pinnaksi, joka kulkee tai liukuu kiinteån kengån yli voitelevan filmin 25 tai oljyn yli. Hihna liikkuu nipin låpi suunnilleen ·· samalla nopeudella kuin puristinkangas, jolloin puris- tinkankaaseen kohdistuu mahdollisimman våhån hankausta kiinteitå komponentteja vasten.A shoe-type long nip press requires a special belt, such as that described in Canadian Patent 1,188,556. Such a belt is to be made into a flat impermeable surface which passes or slides over a fixed shoe over a lubricating film 25 or oil. The belt moves through the nip at approximately the same speed as the press fabric, so that the press fabric is subjected to as little abrasion against the solid components as possible.
Normaali rakenne pitkånippipuristimessa kåsit-30 tåå kahden puristinkankaan kåyton. Nipin komponentit voidaan luetella seuraavassa jårjestyksesså: uritettu sylinterimåinen puristintela, ensimmåinen puristinkangas, kuituinen raina tai muodostuva paperiraina, toinen puristinkangas, erityinen hihna, voiteleva kalvo ja 35 kaareva puristinkenkå.The normal design of a long nip press involves the use of two press fabrics. The components of the nip can be listed in the following order: a grooved cylindrical press roll, a first press fabric, a fibrous web or a forming paper web, a second press fabric, a special belt, a lubricating film, and a curved press shoe.
Kaikki nykyisin kaupallisessa kåytosså olevat pitkånippipuristimet ovat edellå kuvattua rakennetta.All long nip presses currently in commercial use have the structure described above.
92738 392738 3
Kuitenkin tåmå niin kutsuttu kaksihuopainen pitkånippi-puristin rajoittuu tietyn tyyppisiin paperilaatuihin.However, this so-called two-felt long nip press is limited to certain types of paper grades.
Laajennettaessa pitkånippipuristimen kåyttoå hienorapiin paperilaatuihin ja sanomalehtipaperiin on tarpeen ke-5 hittaa yksihuopainen pitkanippipuristin.When extending the use of the long nip press to fine-grained paper grades and newsprint, it is necessary to develop a single-felt long nip press.
Yksihuopaisessa pitkånippipuristimessa nipin komponentit voidaan luetella seuraavassa jarjestykses-sa: tasainen sylinterimainen puristintela, kuituinen raina tai syntyvå paperiraina, puristinkangas, erityi-10 nen hihna, voiteleva kalvo ja kaareva puristinkenka.In a single-felt long nip press, the components of the nip can be listed in the following order: a flat cylindrical press roll, a fibrous web or a resulting paper web, a press fabric, a special belt, a lubricating film, and a curved press shoe.
Kaksihuopaisessa pitkånippipuristimessa kui-tuisesta rainasta puristettu vesi voi mennå jompaan kumpaan puristinkankaista samoin kuin sylinterimåisen puristintelan uriin. Yksihuopaisessa pitkånippipuristi-15 messa kaksi nåistå veden pakoteistå on poistettu. Siinå on vain yksi huopa, ja koska kuituinen raina koskettaa suoraan sylinterimåistå puristintelaa, telalla on ol-tava sileå pinta. Tietenkin tåmå våliaikaisen veden varaston poistuminen on korvattava, jos yksihuopaisen 20 pitkånippipuristimen koskaan halutaan saavuttavan laa-jaa kåyttdå. On ehdottoman vålttåmåtontå, ettå puristi-men nipisså on uria niin, ettå paperirainasta puriste-tulla vedellå yksihuopaisessa pitkånippipuristimessa on paikka varastoitua.In a two-felt long nip press, water compressed from the fibrous web can enter either of the press fabrics as well as the grooves of the cylindrical press roll. In a single-felt long nip press-15, two of these water constraints have been removed. It has only one felt, and since the fibrous web directly contacts the cylindrical press roll, the roll must have a smooth surface. Of course, the removal of this temporary water reservoir must be compensated if the single-felt long nip press 20 is ever to be used extensively. It is absolutely essential that the nip of the press has grooves so that the water to be pressed from the paper web into the single-felt long nip press has space.
25 Kahta låhestymistapaa on kåytetty saavuttamaan ·· tyydyttåvå ratkaisu tåhån ongelmaan. Kanadalainen pa- tentti 1 190 779 esittåå pitkånippipuristimen hihnan, jossa on uria hihnan puolella. Nåmå urat muodostuvat aluskankaan kudoksesta ja hihnan huovan puoleisesta 30 kyllåståmåttomåstå osasta ja ne muodostavat paikan, johon neste voi siirtyå kuituisen rainan puristinkan-kaan ja erityisen huovan kulkiessa nipin låpi.25 Two approaches have been used to achieve a satisfactory solution to this problem. Canadian Patent 1,190,779 discloses a long nip press belt with grooves on the belt side. These grooves are formed by the fabric of the base fabric and the unsaturated part of the felt side of the belt 30 and form a place where liquid can pass through the press fabric of the fibrous web and the special felt as it passes through the nip.
Toinen låhestymistapa on esitetty amerikkalai-sissa patenteissa 4 559 258 ja 4 643 916. Nåmå esittå-35 våt pitkånippipuristimen hihnaa, jossa on urat huovan puolella varastoimaan kuituisesta rainasta puristettua vettå.Another approach is disclosed in U.S. Patents 4,559,258 and 4,643,916. These discloses a long nip press belt with grooves on the felt side for storing water compressed from a fibrous web.
4 927384,92738
Kun nåmå kaksi låhestymistapaa on kohdistettu pååasiassa saavuttamaan ratkaisu vedenpoisto-ongelmiin yksihuopaisessa pitkånippipuristimessa, on huomattu, etta kummankin naista huovista kåytto kaksihuopaisessa 5 pitkånippipuristimessa johtaa lisååntyneeseen uudelleen kastumiseen.When these two approaches are mainly aimed at achieving a solution to the dewatering problems in a single-felt long nip press, it has been found that the use of both women's felts in a double-felt long nip press results in increased re-wetting.
Kåytånnossa kuitenkin on huomattu, etta tyy-dyttåviå uritettuja pitkånippipuristimen hihnoja ei voida valmistaa kaupalliseen kayttoon. Kaikki tåhanas-10 tiset yritykset tehdå tållainen rakenne ovat johtaneet epåonnistuneeseen tuotteeseen johtuen urien delaminaa-tiosta ja/tai urien hajoamisesta. Keksinto kohdistuu pitkanippipuristimessa erityiseen hihnaan, joka ei ole altis delaminaatiolle.In practice, however, it has been found that satisfactorily grooved long nip press belts cannot be made for commercial use. All attempts to make such a structure have resulted in a failed product due to groove delamination and / or groove breakage. The invention relates to a special belt in a long nip press which is not prone to delamination.
15 Edella mainituista ongelmista huolimatta eri- tyiset pitkånippipuristinhihnat, joissa on urat poly-uretaanipåållystetysså pinnassa, edustavat hyvia veden-poisto-ominaisuuksia kaytettyna pitkanippipuristimissa. Keksintona on pitkanippipuristimen hihna, joka ei ole 20 altis naille ongelmille johtuen sen fyysisestå raken-teesta ja sen voidaan katsoa olevan kanadalaisessa patentissa 1 190 779 esitetyn hihnan parannus. Keksin-non mukaiselle hihnalle on tunnusomaista se, mita on esitetty patenttivaatimuksessa 1.Despite the above-mentioned problems, special long nip press belts with grooves in a polyurethane coated surface represent good dewatering properties when used in long nip presses. The invention is a belt for a long nip press which is not prone to these problems due to its physical structure and can be considered as an improvement on the belt disclosed in Canadian Patent 1,190,779. The belt according to the invention is characterized by what is stated in claim 1.
25 Taten keksintona on hihna kaytettåvåksi pit- * kanippipuristimessa paperikoneessa poistamaan vetta kuituisesta rainasta, josta tehdåan jonkinlaista pape-rituotetta. Hihnaan kuuluu paattoman lenkin muotoinen aluskangas, jossa on sisapinta ja ulkopinta. Sisåpinta 30 on påållystetty polymeerihartsilla, joka osittain kyl-laståå aluskankaan; so påållyste ei tåysin tunkeudu aluskankaan rakenteen låpi. Påållyste tekee aluskan-kaasta nesteitå låpåisemåttomån, se on tasainen ja paksuudeltaan vakio. Hihnan påållystetty puoli on kon-35 taktissa kaarevan puristinkengån kanssa pitkånippipu-ristinta kåytettåesså. Tarkemmin se liukuu kaarevan puristinkengån pinnalla kalvoa tai voiteluoljyå vasten.Tate's invention is a belt for use in a long * nip press on a paper machine to remove water from a fibrous web from which some kind of paper product is made. The strap includes an endless loop-shaped underlay with an inner surface and an outer surface. The inner surface 30 is coated with a polymeric resin which partially impregnates the substrate; i.e., the coating does not completely penetrate the structure of the underlay. The coating makes the base fabric impermeable to liquids, it is even and of constant thickness. The coated side of the belt is in contact with the curved press shoe when using the long nipple crosser. More specifically, it slides on the surface of the curved press shoe against the film or lubricating oil.
5 927385,92738
Ulkopinta tai huovan puoli hihnasta on erilai-nen kuin kanadalaisessa patentissa 1 190 779. Siile on ominaista useat litteat yksikuitulangat sopivasti kiin-nitettyinå aluskankaaseen. Litteat yksikuitulangat 5 muodostavat våleihinså kanavia vastaanottamaan kuitui-sesta rainasta puristettua vettå. Tålla tavalla muodos-tetut kanavat eivåt murskaannu nipin puristuksesta, kuten tapahtuu tekniikan tason hihnoissa. Samoin urien delaminaatio ei ole ongelmana, koska litteåt yksikuitu-10 langat on kudottu aluskankaan rakenteeseen sisåån.The outer surface or half of the felt of the belt is different from that of Canadian Patent 1,190,779. It is characterized by a plurality of flat monofilament yarns suitably attached to the base fabric. The flat monofilament yarns 5 form channels between them to receive water compressed from the fibrous web. The channels formed in this way are not crushed by nip compression, as is the case with prior art belts. Likewise, delamination of the grooves is not a problem because the flat monofilament-10 yarns are woven into the structure of the base fabric.
Seuraavassa keksintoå selostetaan yksityiskoh-taisesti viittaamalla oheisiin piirustuksiin, joissa kuva 1 on sivulta leikkauskuva pitkåstå puristusnipis-tå, johon keksinnon mukainen hihna on suunniteltu, 15 ' kuva 2 on osittain leikattu sivukuva kuvan 1 puristus-nipistå, kuva 3 on tasokuva keksinnon mukaisesta hihnasta, kuva 4 on leikkauskuva keksinnon mukaisesta hihnasta kuvasta 3 pitkin linjaa 4-4 ja 20 kuva 5 on leikkauskuva keksinnon mukaisesta hihnasta kuvasta 3 pitkin linjaa 5-5.The invention will now be described in detail with reference to the accompanying drawings, in which Figure 1 is a side sectional view of a long nip on which a belt according to the invention is designed, Figure 2 is a partially sectioned side view of the nip of Figure 1, Figure 3 is a plan view of a belt according to the invention. Figure 4 is a sectional view of the belt according to the invention of Figure 3 taken along line 4-4 and Figure 5 is a sectional view of the belt according to the invention of Figure 3 taken along line 5-5.
Kuvissa 1 ja 2 on esitetty yksihuopainen pit-kånippipuristin poistamaan vetta kuituisesta rainasta, josta tehdåån paperituotetta paperikoneessa. Puristin-25 nipin 10 muodostaa tasainen sylinterimåinen puristinte-la 12, kaareva puristinkenkå 14 ja keksinnon mukainen hihna 16 jårjestettynå siten, ettå se tukeutuu sylinte-rimåistå puristintelaa 12 vasten. Kaarevan puristinken-gån 14 kaarevuussåde on suunnilleen yhtå suuri kuin on 30 sylinterimåisellå puristintelalla 12. Sylinterimåisen puristintelan ja kaarevan puristinkengån vålistå etåi-syyttå voidaan sååtåå perinteisillå ei-esitetyillå hydraulisilla tai mekaanisilla laitteilla yhdistettynå tankoon 18, joka on nivelletysti kiinnitetty kaarevaan 35 puristinkenkåån 14. Tankoa 18 voidaan myos kåyttaå antamaan haluttu puristus kaarevaan puristinkenkåån 14.Figures 1 and 2 show a single felt long nip press for removing water from a fibrous web from which a paper product is made in a paper machine. The nip 10 of the press-25 is formed by a flat cylindrical press roller 12, a curved press shoe 14 and a belt 16 according to the invention arranged so as to rest against the cylindrical press roll 12. The radius of curvature of the curved press shoe 14 is approximately equal to that of the cylindrical press roll 12. The distance between the cylindrical press roll and the curved press shoe 14 can be controlled by means of conventional tank devices 18, not shown. 18 can also be used to provide the desired compression to the curved press shoe 14.
On huomattava, ettå edellå kuvatut ja kuvissa 1 ja 2 92738 6 esitetyt sylinterimåinen puristintela 12 ja kaareva puristinkenkå 14 ovat perinteista tunnettua tekniik-kaa.It should be noted that the cylindrical press roll 12 and the curved press shoe 14 described above and shown in Figures 1 and 2 92738 6 are conventional prior art.
Kuvissa 1 ja 2 on myos esitetty paperikoneen 5 marka puristinkangas 15 ja kuituinen raina 17, josta tehdåån paperirainaa. Hihnan 16, puristinkankaan 15, kuituisen rainan 17 ja sylinterimaisen puristintelan 12 liikkeet on esitetty kuvassa 1 nuolilla.Figures 1 and 2 also show a press fabric 15 of a paper machine 5 and a fibrous web 17 from which a paper web is made. The movements of the belt 16, the press fabric 15, the fibrous web 17 and the cylindrical press roll 12 are shown in Figure 1 by arrows.
Kuvassa 3 on esitettyna tasokuva keksinnon 10 mukaisesta hihnasta 16. Siinå on ulkopinta 19 ja sisa-pinta 20. Hihnaan 16 kuuluu pååttomån lenkin muotoinen aluskangas. Aluskangas voidaan tehda tai kutoa pMåtto-massa muodossa tai se voidaan tehda tasomuodossa, esim. tasokudontana, ja yhdistaå paattomåan muotoon saumalla.Figure 3 shows a plan view of a belt 16 according to the invention 10. It has an outer surface 19 and an inner surface 20. The belt 16 comprises an endless loop-shaped underlay. The base fabric can be made or woven in pMåtto-mass form or it can be made in planar form, e.g. as flat weave, and joined to the endless form by a seam.
15 Saumaus pååttomåan muotoon tehdaan edullisesti ennen kuin hihnan 16 sisapinta påallystetaan polymeerihart-silla.The endless sealing is preferably performed before the inner surface of the belt 16 is coated with a polymeric resin.
Hihnan 16 eras sovellus on esitettyna kuvassa 4, joka esittåa leikkauskuvaa kuvasta 3 pitkin linjaa 20 4-4. Tassa leikkaus on koneensuunnassa eli hihnan 16 lenkin ympari. Ulkopinta 19 ja sisapinta 20 on yleises-ti merkitty. Hihnaan 16 kuuluu koneensuuntaisista lan-goista 24 ja poikittaissuuntaisista langoista 26 kudot-tu monikerroksinen aluskangas 22, joka on kyllastetty 25 sisapinnastaan 20 polymeerihartsilla, kuten esim. poly-·· uretaanilla, pitamaSn se låpaisemåttomånå nesteille mukaanlukien voiteluoljy. Sisapinta 20 on hihnan 16 niin kutsutulla kenkapuolella.An embodiment of the belt 16 is shown in Figure 4, which is a sectional view of Figure 3 taken along line 20 4-4. Here the cut is in the machine direction, i.e. around the 16 loops of the belt. The outer surface 19 and the inner surface 20 are generally marked. The belt 16 includes a multilayer underlay 22 woven from machine direction yarns 24 and transverse yarns 26 impregnated 25 with an inner resin 20 of a polymeric resin, such as polyurethane, to keep it impermeable to liquids, including lubricating oil. The inner surface 20 is on the so-called shoe side of the belt 16.
Aluskangas 22 on riittavån avointa mahdollis-30 tamaan kyllåstyminen eliminoimaan epatoivottujen rako-jen muodostuksen mahdollisuus hihnassa 16 kenkapuolella, sisapinnan 20 ollessa kaarevaa puristinkenkaa 14 vasten. Raot ovat erittain epatoivottuja, koska ne mahdollistaisivat hihnan 16 ja kaarevanmuotoisen puris-35 tinkengan 14 valissa kaytettavSn voiteluoljyn kulun hihnan 16 lapi likaamaan puristinhuopaa ja kuituista rainaa.The backing fabric 22 is sufficiently open to allow saturation to eliminate the possibility of the formation of unwanted cracks in the belt 16 on the shoe side, with the inner surface 20 against the curved press shoe 14. The slits are highly undesirable because they would allow the passage of lubricating oil used between the belt 16 and the curved press-35 tincture 14 through the belt 16 to contaminate the press felt and the fibrous web.
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92738 792738 7
Polymeerikyllåstyksen ja påållystyksen jålkeen hihnan 16 sisapuoli 20 voidaan hioa tasaiseksi ja antaa hihnalle tasainen paksuus voideltuun liukukontaktiin kaarevan puristinkengån 14 kanssa puristusnipisså 10.After polymer impregnation and coating, the inside 20 of the belt 16 can be ground evenly and given a uniform thickness to the belt in lubricated sliding contact with the curved press shoe 14 in the press nip 10.
5 Hihnan 16 ulkosivulle 19 on ominaista koneen- suuntaisesti kulkevat litteåt yksikuitulangat 28. Nåmå on kiinnitetty aluskankaaseen 22 satunnaisilla poikit-taissuuntaisilla langoilla 30. On ymmårrettåvå, ettå kuvien 4 ja 5 esitykset ovat jonkin verran liioitellus-10 sa mittakaavassa esittåen keksinnon osat selvemmin.The outer side 19 of the belt 16 is characterized by machine-running flat monofilament yarns 28. These are attached to the base fabric 22 by random transverse yarns 30. It will be appreciated that the representations of Figures 4 and 5 are somewhat exaggerated on the scale of the invention.
Litteiden yksikuitulankojen 28 tarkoitus voidaan selvemmin selittåå kuvalla 5, joka on leikkauskuva kuvasta 3 pitkin linjaa 5-5. Tåten se on koneen poikit-taissuuntainen leikkaus, ts hihnalenkin poikki. Kompo-15 nenteilla on sama viitenumero kuin kuvassa 4. Litteåt yksikuitulangat 28 on esitetty poikkileikkauksina ja ne on kiinnitetty aluskankaaseen 22 satunnaisesti kutomal-la yhteen koneen poikittaissuuntaisten lankojen 30 kanssa. Litteiden yksikuitulankojen 28 våliin muodostuu 20 kanavia 32 poistamaan nipisså 10 kuituisesta rainasta puristettua vettå. Edullisesti litteåt yksikuitulangat 28 jårjestetåån muodostamaan kolmesta neljåån kanavaa 32 senttimetrillå. Kanavien 32, joiden leveys on 0,6 mm ja syvyys 2,5 mm, on havaittu antavan hyviå tuloksia.The purpose of the flat monofilament yarns 28 can be more clearly explained with reference to Figure 5, which is a sectional view of Figure 3 taken along line 5-5. Thus, it is a cross-section of the machine, i.e. across the belt loop. The components of component 15 have the same reference numeral as in Figure 4. The flat monofilament yarns 28 are shown in cross-sections and are attached to the base fabric 22 by occasional weaving together with the cross-machine direction yarns 30. 20 channels 32 are formed between the flat monofilament yarns 28 to remove water compressed from the fibrous web in the nip 10. Preferably, the flat monofilament yarns 28 are arranged to form three to four channels at 32 centimeters. Channels 32 with a width of 0.6 mm and a depth of 2.5 mm have been found to give good results.
25 Kuvien 4 ja 5 esittåesså koneensuuntaisia litteitå yksikuitulankoja 28, joka on edullinen vaih-toehto, ne voivat olla myos poikittaissuuntaisina hyvin tuloksin.When Figures 4 and 5 show machine direction flat monofilaments 28, which is a preferred alternative, they can also be transverse with good results.
Kuten esitettynå kuvissa 4 ja 5, litteåt yksi-30 kuitulangat 28 on edullisesti jårjestetty siten, ettå niillå on pitkåt juoksut johtuen satunnaisesta yhteen-kutomisesta poikittaissuuntaisten lankojen 30 kanssa, jolloin muodostuu kanavia tai rakoja litteiden yksikuitulanko jen 28 våliin, joihin vesi voi virrata. Sama 35 voi tapahtua tapauksessa, misså litteåt yksikuitulangat 28 ovat poikittaissuuntaisina.As shown in Figures 4 and 5, the flat single fiber yarns 28 are preferably arranged to have long strands due to occasional interweaving with the transverse yarns 30 to form channels or slots between the flat monofilament yarns 28 into which water can flow. The same 35 may occur in the case where the flat monofilament yarns 28 are transverse.
Yleisesti keksinnon mukaisesta hihnasta 16 8 92738 vesi voidaan poistaa nipin 10 ulkopuolella huomattavas-ti helpommin kuin kanadalaisessa patentissa 1 190 779 esitetystå hihnasta. TMsså huovan puolen verkko pyrkii pidåttamåån vettå, mita ei tapahdu keksinndn mukaisen 5 hihnan 16 kanavissa 32.In general, the belt 16 8 92738 of the invention can be dewatered outside the nip 10 much more easily than the belt disclosed in Canadian Patent 1,190,779. TMsså the felt side of the web tends to pidåttamåån wets, does not occur in the belt of the keksinndn 5 16 32 channels.
On helposti ymmarrettavisså, ettå alan ammat-timiehelle on selvåå eri sovellukset patenttivaatimus-ten rajaamissa puitteissa.It will be readily apparent to those skilled in the art that various applications will be apparent within the scope of the appended claims.
IIII
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US40490189A | 1989-09-08 | 1989-09-08 | |
US40490189 | 1989-09-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
FI903569A0 FI903569A0 (en) | 1990-07-13 |
FI92738B FI92738B (en) | 1994-09-15 |
FI92738C true FI92738C (en) | 1994-12-27 |
Family
ID=23601505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI903569A FI92738C (en) | 1989-09-08 | 1990-07-13 | Belt |
Country Status (16)
Country | Link |
---|---|
JP (1) | JPH03185191A (en) |
AT (1) | AT398319B (en) |
AU (1) | AU621509B2 (en) |
BE (1) | BE1002796A3 (en) |
BR (1) | BR9004442A (en) |
CA (1) | CA2024858C (en) |
CH (1) | CH681469A5 (en) |
DE (1) | DE4026339C2 (en) |
FI (1) | FI92738C (en) |
FR (1) | FR2651808B1 (en) |
GB (1) | GB2235707B (en) |
IT (1) | IT1248620B (en) |
NL (1) | NL191601C (en) |
NO (1) | NO177275C (en) |
NZ (1) | NZ234490A (en) |
SE (1) | SE505713C2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA907421B (en) * | 1989-09-19 | 1991-08-28 | Jwi Ltd | Press section dewatering fabric |
US5171389A (en) * | 1991-11-08 | 1992-12-15 | Albany International Corp. | Spiral construction of grooved long nip press |
JPH10120137A (en) * | 1996-10-21 | 1998-05-12 | Mitsuboshi Belting Ltd | Conveyer belt and manufacture of same |
DE19900989A1 (en) | 1999-01-13 | 2000-07-27 | Voith Sulzer Papiertech Patent | Belt for machines for the production of material webs |
DE102004011665A1 (en) * | 2004-03-10 | 2005-10-06 | Stowe Woodward Ag | Integral shoe press belt |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL185678C (en) * | 1981-09-24 | 1990-06-18 | Albany Int Corp | Pressing device for dewatering a fiber web, as well as a method for manufacturing an endless belt therefor. |
US4643916A (en) * | 1982-10-01 | 1987-02-17 | Ichikawa Woolen Textile Co., Ltd. | Method for manufacturing a pressure belt for use with extended nip press in paper making machine |
JPS5954598U (en) * | 1982-10-01 | 1984-04-10 | 市川毛織株式会社 | Pressure belt for wide nip press of paper machine |
JPS6081391A (en) * | 1983-10-07 | 1985-05-09 | 三菱重工業株式会社 | Endless belt |
FR2560242B1 (en) * | 1984-02-29 | 1986-07-04 | Asten Fabriques Feutres Papete | CANVAS, PARTICULARLY FOR PAPER MACHINES, AND PROCESS FOR PREPARING THE SAME |
-
1990
- 1990-07-13 FI FI903569A patent/FI92738C/en not_active IP Right Cessation
- 1990-07-13 NZ NZ234490A patent/NZ234490A/en unknown
- 1990-07-17 SE SE9002454A patent/SE505713C2/en not_active IP Right Cessation
- 1990-07-23 NL NL9001672A patent/NL191601C/en not_active IP Right Cessation
- 1990-08-21 DE DE4026339A patent/DE4026339C2/en not_active Expired - Fee Related
- 1990-08-31 GB GB9019038A patent/GB2235707B/en not_active Expired - Fee Related
- 1990-09-03 CH CH2842/90A patent/CH681469A5/de not_active IP Right Cessation
- 1990-09-06 BR BR909004442A patent/BR9004442A/en not_active IP Right Cessation
- 1990-09-06 FR FR9011083A patent/FR2651808B1/en not_active Expired - Fee Related
- 1990-09-07 CA CA002024858A patent/CA2024858C/en not_active Expired - Fee Related
- 1990-09-07 BE BE9000863A patent/BE1002796A3/en not_active IP Right Cessation
- 1990-09-07 IT IT04825990A patent/IT1248620B/en active IP Right Grant
- 1990-09-07 AU AU62314/90A patent/AU621509B2/en not_active Ceased
- 1990-09-07 NO NO903918A patent/NO177275C/en not_active IP Right Cessation
- 1990-09-07 JP JP2235949A patent/JPH03185191A/en active Pending
- 1990-09-07 AT AT0183090A patent/AT398319B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CA2024858A1 (en) | 1991-03-09 |
NO903918D0 (en) | 1990-09-07 |
GB9019038D0 (en) | 1990-10-17 |
NL191601B (en) | 1995-06-16 |
NL9001672A (en) | 1991-04-02 |
CH681469A5 (en) | 1993-03-31 |
FR2651808A1 (en) | 1991-03-15 |
NO177275B (en) | 1995-05-08 |
GB2235707A (en) | 1991-03-13 |
AU621509B2 (en) | 1992-03-12 |
ATA183090A (en) | 1994-03-15 |
DE4026339A1 (en) | 1991-03-14 |
IT9048259A1 (en) | 1992-03-07 |
SE9002454L (en) | 1991-03-09 |
FI92738B (en) | 1994-09-15 |
BE1002796A3 (en) | 1991-06-11 |
IT9048259A0 (en) | 1990-09-07 |
AU6231490A (en) | 1991-03-14 |
SE9002454D0 (en) | 1990-07-17 |
AT398319B (en) | 1994-11-25 |
GB2235707B (en) | 1993-06-16 |
NZ234490A (en) | 1991-12-23 |
JPH03185191A (en) | 1991-08-13 |
BR9004442A (en) | 1991-09-10 |
IT1248620B (en) | 1995-01-21 |
NL191601C (en) | 1995-10-17 |
NO177275C (en) | 1995-08-16 |
SE505713C2 (en) | 1997-09-29 |
FI903569A0 (en) | 1990-07-13 |
CA2024858C (en) | 1995-07-25 |
FR2651808B1 (en) | 1996-06-21 |
DE4026339C2 (en) | 1996-03-14 |
NO903918L (en) | 1991-03-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG | Patent granted |
Owner name: ALBANY INTERNATIONAL CORP. |
|
BB | Publication of examined application | ||
MM | Patent lapsed |
Owner name: ALBANY INTERNATIONAL CORP. |