EP0005691A1 - Elément de construction coopérant avec la toile ou le feutre d'une machine de drainage d'une pâte et son procédé de fabrication - Google Patents
Elément de construction coopérant avec la toile ou le feutre d'une machine de drainage d'une pâte et son procédé de fabrication Download PDFInfo
- Publication number
- EP0005691A1 EP0005691A1 EP79890004A EP79890004A EP0005691A1 EP 0005691 A1 EP0005691 A1 EP 0005691A1 EP 79890004 A EP79890004 A EP 79890004A EP 79890004 A EP79890004 A EP 79890004A EP 0005691 A1 EP0005691 A1 EP 0005691A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steatite
- hard material
- molded part
- component
- special
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 238000010276 construction Methods 0.000 title description 3
- 239000000463 material Substances 0.000 claims abstract description 43
- 229910052574 oxide ceramic Inorganic materials 0.000 claims abstract description 37
- 239000011224 oxide ceramic Substances 0.000 claims abstract description 36
- 239000004744 fabric Substances 0.000 claims abstract description 9
- 239000011888 foil Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 239000000057 synthetic resin Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 230000003993 interaction Effects 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract 1
- 230000008646 thermal stress Effects 0.000 abstract 1
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000283707 Capra Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- D21F1/48—Suction apparatus
- D21F1/483—Drainage foils and bars
Definitions
- the invention relates to a component which interacts with the screen or felt of a fabric dewatering machine, in particular paper machine, in particular foil, which has hard material parts which are embedded in a material of lower hardness or are connected to a material of lower hardness and preferably over the entire width of the dewatering machine, and a method for producing such a component.
- Oxide ceramics are produced in relatively short segments of approximately 200 to 300 mm and have a Mohs hardness of approximately 9.2.
- the strips of a paper machine should also be able to be pulled out of the paper machine for the purpose of cleaning under the running sieve. It has therefore already been proposed to fix oxide ceramic elements with the interposition of a polyester resin on a steel profile rail. This design of an extendable bar as a component interacting with the screen of a fabric dewatering machine is associated with a number of disadvantages.
- oxide ceramic material Due to the significant differences in the thermal expansion coefficients of oxide ceramic material, epoxy resin and chrome-nickel-steel strips, there may be minor breakouts and chips at the joints of the oxide ceramic segments. However, such slight unevenness is dangerous for the screen moving at high speed over this bar and can lead to the screen being cut. In addition, it is necessary for foils to bevel the surface interacting with the screen following the sharp-edged leading edge of the screen, for which expensive grinding work is required. Because of their high Mohs hardness, oxide ceramics can only be ground with diamond discs.
- the training according to the invention essentially consists in that the material of lower hardness consists of steatite or special steatite.
- Steatite or special steatite are to be understood in the following as materials which are described in DIN 40 685, sheet 1 / VDE 0335, part 1 on pages 10 to 17 under type KER 220 and KER 221.
- the data are essentially the properties of the oxide ceramic elements known for the surface of such components of group 700, in particular of the type KER 710 of the same DIN standard.
- the steatite or special steatite used according to the invention is distinguished, on the one hand, by excellent swell security and, moreover, has the advantage over the known design in which the oxide ceramic elements were connected to a steel strip by means of filled epoxy resins that there are no differences in thermal expansion. While oxide ceramics have a coefficient of linear expansion a t of 5 - 7 x 10 -6 degrees -1 for the temperature range between 20 and 100 C, steatite or special steatite has values between 6 and 9 x 10 degrees.
- the bulk density of the material used according to the invention is at least between 2.6 and 2.7 kg / dm 3 .
- Steatite or special steatite has a compressive strength of at least 850 to 900 N / mm 2 , a flexural strength between 120 and 14 0 N / mm2, and a Mohs hardness of about 7. While the epoxy resin previously used, for example Araldit 404, the company Ciba-Geigy thermal expansion coefficient between 30 and and chrome-nickel steel have a thermal expansion coefficient of approximately has, the material used according to the invention has a thermal expansion coefficient which is essentially the same as that of the oxide ceramic, so that, in the embodiment according to the invention, curvatures and splintering of the abutting edges of the oxide ceramic do not have to be feared in the case of temperature fluctuations.
- paper machines have a width of approx. 3 m to approx. 9 m, so that, for example with a width of 4 m and a temperature change from 20 to 50 °, the calculated change in length for the synthetic resin 3 mentioned 84 mm, for the oxide ceramic or special steatite of about 0.72 mm and for steel a change in length of 1.92 mm.
- the material consisting of steatite or special steatite is preferably designed as a molded part which has recesses for receiving the hard material parts, in particular oxide ceramic parts, the hard material parts only in the area of the casserole edge of the component are provided.
- the design can be such that the trailing edge of the component is bevelled starting from the transition point of the hard material parts onto the surface of the steatite or special steatite. This bevel can already.
- the molded part consisting of steatite or special steatite can be realized or can be subsequently produced by grinding, steatite or special steatite being able to be ground with silicon carbide without the surface of the oxide ceramic being adversely affected, since the hardness of the steatite or special steatite material is about two units the Mohs scale is lower than that of oxide ceramics.
- the surface properties of the steatite or special steatite are significantly superior to the properties of synthetic resins and it has been shown that the abrasion wear of such surfaces consisting of steatite or special steatite interacting with the sieve is substantially less than the corresponding wear of plastic materials.
- Ceramic products consisting of steatite or special steatite can generally only be produced in short lengths. Particularly good rigidity and the least risk of splintering of the abutting edge of the oxide ceramic is achieved if the segments consisting of steatite or special steatite are coated with those made of oxide ceramic, in particular! standing hard material segments are connected in a manner in which at least the butt joints of the steatite or special steatite segments which follow one another in the axial direction of the component are arranged offset in plan view from the hard material segments. In this way it becomes a kind of goat: created connection, which increases the bending stiffness of the component.
- connection of the oxide ceramics with the segments consisting of steatite or special steatite can be done in a simple manner and without any appreciable additional difficulties by means of synthetic resin adhesives, whose different thermal expansion coefficients are absorbed by the elasticity of the adhesive.
- Such a component can be designed in a simple manner so that the molded part made of steatite or special steatite has a groove on its underside facing away from the sieve for pushing the component onto a corresponding counter profile of the paper machine uriter construction, in particular a T-profile beam.
- Such a groove will be safely removed from the substructure due to the low tendency of the component to reject at temperature differences, which is due among other things to the friction of the sieve passing over the bar at high speed on the component, and again without problems after cleaning be postponed.
- pulling the bar from the substructure generally required hitting the end faces of the bar, and the impact stress again gave rise to the risk of the abutting edges of the oxide ceramic being chipped.
- the design can also be such that the steatite or special steatite segments of the molded part are combined from a common carrier rail, in particular made of steel, with an essentially U-shaped profile to form a structural unit which extends across the width of the paper machine. Since the support rail is isolated from the sensitive oxide ceramic segments by the steatite or special steatite segments of the base body, no significant temperature stresses occur here either.
- the method according to the invention for producing such a component is essentially characterized in that a molded part with recesses for receiving the hard material parts is extruded from steatite or special steatite and that the hard material parts are then fixed in the recesses by gluing, in particular with a synthetic resin adhesive become.
- Steatite or special steatite is high Stammergenauig- ke it both in the casting process as are made to scale in the extrusion process.
- the advantage of the extrusion process is that longer components made of steatite or special steatite can be manufactured with high dimensional accuracy.
- the molding of steatite or S is extruded ondersteatit.
- a homogeneous molded part is created that has the same surface hardness as before, even after grinding, for example after producing the run-off angle of 0.5 to 4 ° at the run-off edge of the component or after grinding in contact curves for the chain line of the screen the grinding treatment.
- this requirement is given to the homogeneity of the material of the molded part measured not to the same training, since usually a harder outer surface and a slightly softer core is achieved, so that after a grinding attack suffers from the surface hardness.
- the molded part can be extruded with through openings extending in the axial direction, and in the event that these openings are bores extending in the axial direction of the component, tension rods and / or coolant are subsequently introduced into these bores can.
- the continuous opening can, however, also represent a profile which is open at the bottom and which is intended for receiving the corresponding counter profile of the paper machine substructure.
- the component according to the invention can be manufactured in such a way that the hard material parts, which consist in particular of oxide ceramic parts, are arranged downwards on a flat surface with their surface intended for interaction with the screen or felt, and molded parts consisting of steatite or special steatite with essentially the same segment length in the longitudinal direction of the Hartmaterialseg- me nts offset are pressed to the hard segments of material with interposition of a synthetic resin adhesive.
- FIG. 1 is a cross section through a mold part made of steatite
- Fig. 2 shows a cross section through a modified form of the molded article
- F ig. 3 is a cross section through a further embodiment with inserted Oxydkeramiksegmenten
- Fig. 4 shows a modified embodiment in the same section as Fig. 3
- F ig. 5 shows a view of a partial area of a component according to the invention against the direction of wire travel from the front
- FIG. 6 shows a further embodiment of the component according to the invention in a section analogous to FIG. 3.
- the base body 1 is shown as a molded body extruded from steatite, which has recesses 2 for receiving oxide ceramic segments.
- the surface of this molded part 1 which comes into contact with the sieve is designated by 3 and has an outlet angle ⁇ of approximately 3 ° with respect to the plane 4 which is aligned with the oxide ceramic segments (not shown).
- the surface 3 is ground and polished.
- the molded part On its surface 5 facing away from the surface 3 in contact with the sieve, the molded part has a recess 6 which can be inserted via a corresponding profile, not shown, of the paper machine substructure.
- the molded part 1 also has bores 7 extending in the axial direction of this molded part, through which tie rods can be passed. A coolant can also be passed through these holes.
- the reference numerals of FIG. 1 are retained for analog parts, the recess 2 ′ differing from the recess 2 in FIG. 1 in the region of the leading edge of the component. Also, where the - cooperating with the sieve surface 3 opposite side 5 provided recess 6 'differs from the recess 6 of Figure 1 from..
- the recess 6 ' is delimited by obliquely running side walls 8, whereby a dovetail profile is formed which has a corresponding one Counter profile of the paper machine substructure can be pushed.
- the molded part 1 made of steatite is arranged in an essentially U-shaped carrier rail 9.
- the oxide ceramic elements are designated by 10 and arranged in the region of the leading edge 11 of the component designed as a foil.
- the carrier rail 9 is followed by a second profile rail 12 which carries the C-profile 13 which interacts with a T-profile of the paper machine substructure, the corresponding molded body 14 being made of plastic.
- the abutting edges 15 of the oxide ceramic segments 10 lie centrally between the abutting edges 16 of the segments 1 of the base body consisting of steatite or special steatite and are connected to them with the interposition of an adhesive layer 17.
- the paper machine substructure tion is indicated at 21.
- a T-bar is indicated by 22, via which the drainage strip can be slid on laterally.
- the sieve is again indicated at 18.
- the base body 1 made of steatite or special steatite has a profile groove on its underside, which is pushed onto the paper machine via a T-bar of the paper machine substructure can.
- the oxide ceramic elements are again designated 10.
- Tension rods and / or coolant can again be guided through the bores 7 extending in the longitudinal direction of the component. Due to the inventive design of the base body as an extruded molded part made of steatite or special steatite, the profile groove 20 can be made substantially larger than was previously the case with the known designs of such grooves for fastening the bar. In the representation according to FIG.
- an intermediate layer 23 made of felt is arranged in the cavity of this groove, which facilitates the pushing of the strip onto the T-profile of the substructure. Since this cavity of this groove can be chosen to be of almost any size, a hydraulic or penumatic hose which can be pressurized can be arranged instead of this intermediate layer 23 on the basis of the design according to the invention. If such a hose is pressurized, the bar is raised and inwardly projecting ribs 24, which engage under the T-profile of the substructure, can determine the exact altitude in the defined state. In this way, simple and secure definition of such strips is made possible. This advantage again arises only on the basis of the design of the base body 1 as an extruded molded part, which enables any configuration of the groove.
- the components according to the invention can be designed as foils, as shown in the drawing, or as drainage strips for suction boxes. in the the latter case, the surfaces of the steatite or special steatite moldings just adjoin the surface of the oxide ceramic.
Landscapes
- Paper (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT3474/78 | 1978-05-12 | ||
| AT347478 | 1978-05-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0005691A1 true EP0005691A1 (fr) | 1979-11-28 |
Family
ID=3551030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP79890004A Withdrawn EP0005691A1 (fr) | 1978-05-12 | 1979-05-11 | Elément de construction coopérant avec la toile ou le feutre d'une machine de drainage d'une pâte et son procédé de fabrication |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0005691A1 (fr) |
| FI (1) | FI791520A7 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0010924A1 (fr) * | 1978-11-02 | 1980-05-14 | Albany International Corp. | Dispositif d'égouttage pour machines à papier et autres machines semblables et son procédé de fabrication |
| WO1984003314A1 (fr) * | 1983-02-24 | 1984-08-30 | Feldmuehle Ag | Dispositif d'elimination de l'eau pour la partie humide d'une machine a papier |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2363067A (en) * | 1938-12-09 | 1944-11-21 | Gen Electric | Ceramic materials |
| GB649664A (en) * | 1947-08-20 | 1951-01-31 | British Thomson Houston Co Ltd | Improvements in and relating to ceramic sealing compositions |
| DE1905914A1 (de) * | 1969-02-06 | 1971-02-04 | Johnson Wire Works Ltd | Wasserabschaber |
| DE1958758B1 (de) * | 1969-11-22 | 1971-06-16 | Voith Gmbh J M | Feststehende Stuetzvorrichtung fuer das Siebband einer Entwaesserungsmaschine,insbesondere Entwaesserungsleiste fuer die Siebpartie einer Papiermaschine |
| DE2229506A1 (de) * | 1971-06-17 | 1972-12-21 | Bartelmuss, Heinrich, Ing , Teufen bach, Steiermark (Osterreich) | Maschinenteile, insbesondere Belag teile und Verfahren zu deren Herstellung |
| DE2229509A1 (de) * | 1971-07-01 | 1973-01-11 | Heinrich Ing Bartelmuss | Maschinenteile |
| GB1313624A (en) * | 1970-04-17 | 1973-04-18 | Jwi Ltd | Drainage foil |
| FR2152107A5 (en) * | 1971-09-09 | 1973-04-20 | Huyck Corp | Paper making machine hydrofoil - reducing drive resistance by 30% and increasing water extraction by up to 150% |
-
1979
- 1979-05-11 EP EP79890004A patent/EP0005691A1/fr not_active Withdrawn
- 1979-05-11 FI FI791520A patent/FI791520A7/fi not_active Application Discontinuation
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2363067A (en) * | 1938-12-09 | 1944-11-21 | Gen Electric | Ceramic materials |
| GB649664A (en) * | 1947-08-20 | 1951-01-31 | British Thomson Houston Co Ltd | Improvements in and relating to ceramic sealing compositions |
| DE1905914A1 (de) * | 1969-02-06 | 1971-02-04 | Johnson Wire Works Ltd | Wasserabschaber |
| DE1958758B1 (de) * | 1969-11-22 | 1971-06-16 | Voith Gmbh J M | Feststehende Stuetzvorrichtung fuer das Siebband einer Entwaesserungsmaschine,insbesondere Entwaesserungsleiste fuer die Siebpartie einer Papiermaschine |
| GB1313624A (en) * | 1970-04-17 | 1973-04-18 | Jwi Ltd | Drainage foil |
| DE2229506A1 (de) * | 1971-06-17 | 1972-12-21 | Bartelmuss, Heinrich, Ing , Teufen bach, Steiermark (Osterreich) | Maschinenteile, insbesondere Belag teile und Verfahren zu deren Herstellung |
| DE2229509A1 (de) * | 1971-07-01 | 1973-01-11 | Heinrich Ing Bartelmuss | Maschinenteile |
| FR2152107A5 (en) * | 1971-09-09 | 1973-04-20 | Huyck Corp | Paper making machine hydrofoil - reducing drive resistance by 30% and increasing water extraction by up to 150% |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0010924A1 (fr) * | 1978-11-02 | 1980-05-14 | Albany International Corp. | Dispositif d'égouttage pour machines à papier et autres machines semblables et son procédé de fabrication |
| WO1984003314A1 (fr) * | 1983-02-24 | 1984-08-30 | Feldmuehle Ag | Dispositif d'elimination de l'eau pour la partie humide d'une machine a papier |
Also Published As
| Publication number | Publication date |
|---|---|
| FI791520A7 (fi) | 1979-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE3200397C2 (de) | Entwässerungsleiste für Papiermaschinen | |
| DE7706988U1 (de) | Mehrschichtiges klebematerial in platten- oder streifenform | |
| DE2922568A1 (de) | Verfahren zur herstellung einer platte, versehen mit einer randleiste aus einem kunststoffmaterial an wenigstens einer seitenrandflaeche derselben, sowie nach diesem verfahren erhaltene platte | |
| DE4106911A1 (de) | Schi mit seitenwangen und kleberschichten aus einem kunststoffschaum | |
| DE60015898T2 (de) | Band für eine Schuhpresse | |
| EP0350827B1 (fr) | Boîte d'aspiration | |
| DE2154901A1 (de) | Streichleiste (Hydrofoil) für Papiermaschinen | |
| DE3002452C2 (de) | Platte aus Holzwerkstoff, z.B. Tischplatte für Garten-, Camping- oder Küchentische | |
| EP0005691A1 (fr) | Elément de construction coopérant avec la toile ou le feutre d'une machine de drainage d'une pâte et son procédé de fabrication | |
| DE3220256A1 (de) | Verfahren zur herstellung einer waermeisolierenden rahmenschiene fuer fensterfluegel | |
| EP1664410B1 (fr) | Courroie tissee pour une machine de production de carton ondule | |
| DE69620202T2 (de) | Abriebfestes schaberelement | |
| DE6915425U (de) | Klavierhammer, insbesondere klavierhammerfilz | |
| EP1770193A1 (fr) | Barre pour un métier à mailles jetées et procédé de production | |
| DE2244007C2 (de) | Gleis | |
| EP1404420B1 (fr) | Noyau leger et son procede de production | |
| EP1516652A1 (fr) | Planche de glisse, par exemple snowboard | |
| DE2461213C3 (de) | Ski mit einem Holzkern sowie Verfahren zu seiner Herstellung | |
| DE2650343C2 (de) | Entwässerungselement für Faserstoffentwässerungsmaschinen | |
| DE3446091C2 (de) | Profil zum Einfassen der Kanten einer Öffnung | |
| DE2311421A1 (de) | Dichtungsprofil, insbesondere fuer bauwerke | |
| AT357023B (de) | Einschubleiste | |
| DE8911160U1 (de) | Mehrschichtiger Betondachstein | |
| DE102023114617A1 (de) | Walze und Beschichtungsvorrichtung | |
| DE2337936A1 (de) | Ski mit verstaerkungsschicht und verfahren zu dessen herstellung |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): DE GB IT SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |