EP0151705B1 - Bande à chaînons pour machines à papier - Google Patents
Bande à chaînons pour machines à papier Download PDFInfo
- Publication number
- EP0151705B1 EP0151705B1 EP84113770A EP84113770A EP0151705B1 EP 0151705 B1 EP0151705 B1 EP 0151705B1 EP 84113770 A EP84113770 A EP 84113770A EP 84113770 A EP84113770 A EP 84113770A EP 0151705 B1 EP0151705 B1 EP 0151705B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screen
- segments
- flocked
- helical
- helices
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/08—Felts
- D21F7/083—Multi-layer felts
-
- 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
-
- 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
- D21F1/0072—Link belts
Definitions
- the invention relates to a spiral sieve made of plastic spirals for paper machines.
- spiral screens in the dryer section of a paper machine, which consist of plastic filaments connected by plug wires.
- the coils are mostly made of wires that have a round, oval or rectangular cross-section.
- Coils are also known in which the wires are flattened in the part of the coil in contact with the paper and / or roller. Due to the flattened parts of the helix, the air permeability of the sieve can be reduced, which is desirable in many cases.
- FR-A-2 494 319 and 2 494 233 disclose a so-called shrinking sieve made from wire helices, in which profiles or wires are inserted into the inner space enclosed by the U-turn, which are flocked on their surface to be on them Way to control the permeability of the sieve.
- the surface of the sieve is not up to the highest quality requirements because it is not uniformly homogeneous.
- the invention is therefore based on the object of creating a spiral screen which has a top which is as dense and homogeneous as possible, has no seam zone in the closed state and can therefore also be used in the wet end in the paper machine.
- the top should also be such that the screen can also be used for papers with the highest quality requirements.
- a flock height of up to 3 mm is sufficient for the dryer section in the case of sieves, the fibrous web being formed from polyester fibers.
- the flock height is greater than 3 mm and the fibrous web consists of polyamide fibers.
- mixed flocking from fibers of different lengths is also possible.
- all other types of synthetic fibers used in dry or wet areas can also be used. The flocking can therefore be adapted to any application.
- the sieve is formed from flattened spirals, i. that is, if the filaments consist of flattened wire at least on the top of the sieve.
- the flocked sieve can be needled with a fleece and that a sieve obtained in this way exhibits particularly good elastic recovery properties in use because of the fibers of the pile perpendicular to the sieve and the fleece lying thereon. This not only gives the screen a qualitative improvement, but also improves its service life.
- the fiber pile is colored black. This coloring causes the screen to heat up a lot, which has a favorable effect on the drying process.
- a further embodiment of the invention proposes a method for producing the spiral screen, in which, according to the invention, individual spiral screen segments are subjected to flocking and the flocked segments are connected to form a screen.
- a spiral sieve is formed from the plastic helices for this purpose, which is subjected to a pre-thermosetting. The sieve is then divided into segments, the size of which is determined by the size of the flocking machine, and the segments are flocked. The flocked segments are then joined together again to form a spiral sieve. This sieve is supplied open and endlessly assembled in the paper machine.
- the relevant segments are provided with an adhesive layer and over the negatively charged metal plate of the flocking machine guided.
- the container for the flocking material is charged positively.
- the flocking height is determined by the length of the individual fibers.
- the flocking density is specified by the flocking duration and other usual parameters.
- the temperature of the pre-heat setting is set such that it is above the drying temperature for the flocked segments and that the latter is higher than the temperature of the final heat setting of the entire screen.
- FIG. 1 An endless spiral sieve made of plastic coils for paper machines is not shown, since sieves of this type are generally known.
- Fig. 1 the segment of such a screen is therefore shown schematically in a side view.
- the segment 1 consists of a plurality of plastic helices 2, which are connected to one another by the plug wires 3.
- the top 4 of the segment 1 and thus also of the spiral sieve is provided with flocking from the fiber pile 5.
- the segment was coated with an adhesive 6 before flocking.
- the flock height 7 was chosen with regard to the purpose of the paper screen.
- the wires 8 of the coils 2 are flattened on the outside of the sieve.
- the individual segments 1 are joined together to form an endless sieve. For this, it is advantageous if the end coils 10 and 11 are removed before the connection process in which the plug wires 12 and 13 are removed.
- the new end coils of segment 1 which then arise are connected to one another with the end coils of the adjoining segments formed in the same way by inserting the coils into one another and inserting a plug wire
- the segment 15 shown in FIG. 2 has essentially the same structure as the segment 1 according to FIG. 1, with the difference that the wires of the coils 2 are not flattened on the upper side of the segment and that one on the fiber pile 5 Fleece layer 16 is placed and needled to the segment.
- the application of the fibrous web to the top of the segment takes place in the same way as described in FIG. 1.
- the fabric sieve 21 consists in the usual way of warp and weft threads, the warp threads ending at the connection point of the seam in loops 22, in which the spirals 23 and 24 engage.
- Pins 25 and 26 are used for the articulated connection of the helixes 23 and 24 inserted into the loops 22.
- the helixes 23 and 24 are connected to one another via the pin 27.
- the helixes are provided on its top 28 with the flocking 29.
Landscapes
- Paper (AREA)
- Making Paper Articles (AREA)
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84113770T ATE35434T1 (de) | 1984-02-09 | 1984-11-14 | Spiralsieb fuer papiermaschinen. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3404544 | 1984-02-09 | ||
DE19843404544 DE3404544A1 (de) | 1984-02-09 | 1984-02-09 | Spiralsieb fuer papiermaschinen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0151705A2 EP0151705A2 (fr) | 1985-08-21 |
EP0151705A3 EP0151705A3 (en) | 1986-02-05 |
EP0151705B1 true EP0151705B1 (fr) | 1988-06-29 |
Family
ID=6227202
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84113770A Expired EP0151705B1 (fr) | 1984-02-09 | 1984-11-14 | Bande à chaînons pour machines à papier |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0151705B1 (fr) |
AT (1) | ATE35434T1 (fr) |
DE (2) | DE3404544A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4958673A (en) * | 1985-02-19 | 1990-09-25 | Asten Group, Inc. | Papermaking machine and a seamed papermaker's fabric |
FR2577581B1 (fr) * | 1985-02-19 | 1987-03-06 | Feutres Papeteries Tissus Indl | Procede de raccordement de deux troncons de bande d'essorage composite, notamment de feutre de partie humide de papeterie. |
US5077116A (en) * | 1989-05-26 | 1991-12-31 | Lefkowitz Leonard R | Forming fabric having a nonwoven surface coating |
WO1990014465A1 (fr) * | 1989-05-26 | 1990-11-29 | Lefkowitz Leonard R | Tissu de formage a revetement de surface non tisse |
DE19726933A1 (de) * | 1997-06-25 | 1999-01-07 | Voith Sulzer Papiermasch Gmbh | Trockensieb |
DE102004056319A1 (de) * | 2004-11-22 | 2006-05-24 | Voith Fabrics Patent Gmbh | Papiermaschinenbespannung |
DE102014205422A1 (de) * | 2014-03-24 | 2015-07-09 | Voith Patent Gmbh | Bespannung |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2120967A1 (en) * | 1970-04-28 | 1971-11-18 | Cofpa-Compagnie des Feutres Pour Papeteries et des Tissus Industrieis, Le Gond Pontouvere, Charente (Frankreich) | Woven endless paper web dehydrating screen with flocculated surface |
CH610273A5 (en) * | 1975-10-02 | 1979-04-12 | Munzinger Conrad & Cie Ag | Flat formation acting as a wire link conveyor |
FR2494318B1 (fr) * | 1980-11-14 | 1986-10-10 | Feutres Papeteries Tissus Indl | Bande constituee de spirales |
FR2494319A1 (fr) * | 1980-11-14 | 1982-05-21 | Feutres Papeteries Tissus Indl | Manchon tubulaire et procedure de realisation |
FR2494233B1 (fr) * | 1980-11-14 | 1985-10-25 | Feutres Papeteries Tissus Indl | Bande transporteuse |
-
1984
- 1984-02-09 DE DE19843404544 patent/DE3404544A1/de not_active Withdrawn
- 1984-11-14 DE DE8484113770T patent/DE3472427D1/de not_active Expired
- 1984-11-14 AT AT84113770T patent/ATE35434T1/de not_active IP Right Cessation
- 1984-11-14 EP EP84113770A patent/EP0151705B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0151705A2 (fr) | 1985-08-21 |
DE3472427D1 (en) | 1988-08-04 |
DE3404544A1 (de) | 1985-08-14 |
EP0151705A3 (en) | 1986-02-05 |
ATE35434T1 (de) | 1988-07-15 |
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