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
  • D21F1/0027—Screen-cloths
  • D21F1/0036—Multi-layer screen-cloths
  • D21F1/0045—Triple layer fabrics
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2139—Coating or impregnation specified as porous or permeable to a specific substance [e.g., water vapor, air, etc.]

Definitions

• the invention relates to a woven belt for a corrugated pasting machine according to the preamble of claim 1.
• a woven belt for a corrugated cardboard gluing machine is known from WO 96/07788, which ensures good drainage of the material placed on it over a long service life with a high quality standard. Due to increasing requirements, it must be ensured that the belt has a sufficiently high mechanical strength. This leads to multilayered fabric structures, which disadvantageously reduce the permeability of the belt.
• the invention has for its object to design a belt for a corrugated cardboard gluing machine in such a way that a high coefficient of friction of the paper side is ensured even over long operating times and at the same time the vapor permeability of the belt is not impaired, so that there is rapid dehumidification of the corrugated cardboard lying thereon.
• the object is achieved with the features of claim 1.
• the strip of a material that increases the friction on the paper side ensures that the belt has a high coefficient of friction even under unfavorable operating conditions and even after a long period of operation, so that the corrugated cardboard on top is transported safely and without slipping and the position does not change during the manufacturing process. Since the strip is made of a material that increases friction, narrower than the width of the belt, the vapor permeability of the belt is retained regardless of the coating material chosen, so that rapid dehumidification of the corrugated cardboard material lying on top is ensured. Even if several strips are provided side by side to achieve good transport properties across the width of the belt, there is good vapor permeability. Drainage channels for removing moisture are preferably formed between adjacent strips in the belt.
• the strip is formed from a material which increases the coefficient of friction by a warp thread itself which carries an outer coating which increases the coefficient of friction.
• a warp thread is woven into the paper side during the weaving process and, with its outer side lying in the paper side, forms a narrow strip of a material that increases the friction value. Additional processing steps for applying a material strip that increases the coefficient of friction can be omitted.
• a plurality of warp threads with a coating which increases the coefficient of friction are preferably added across the width of the paper side. due due distribution, all of which are inserted into the paper page during the weaving process. It can also be advantageous to form all the warp threads of the fabric layer forming the paper side with a coating that increases the friction value, so that a virtually almost complete coating of the paper side is achieved. Since the coating is composed of many adjacent warp threads, cavities and gaps remain between adjacent warp threads, depending on the weave structure and density, so that the vapor permeability of the belt is retained despite a quasi-full-surface coating.
• the coating is advantageously made of silicone.
• electrically conductive metal fibers are added to the thread material of the weft threads and / or the warp threads, so that electrostatic charging is largely avoided.
• the thread material with the admixed metal fibers can be provided both in the fabric layer forming the paper side, in the middle fabric layer and also in a possible further fabric layer.
• FIG. 4 shows a schematic top view of the paper side of a belt according to FIG. 1.
• FIG. 6 shows a schematic representation of the top view of the upper fabric layer of the belt from FIG. 5 forming the paper side
• FIG. 7 shows a schematic illustration of the top view of the lower fabric layer of the belt from FIG. 5, 8 is a schematic representation of a further woven belt in longitudinal section,
• FIG. 9 shows a schematic representation of the top view of the upper fabric layer of the belt from FIG. 8 forming the paper side
• FIG. 10 is a schematic representation of the top view of the lower fabric layer of the belt from FIG. 8.
• Fig. 1 an embodiment of a belt 1 is shown.
• the belt 1, which is preferably made of plastic threads, in particular monofilaments, consists of an upper fabric layer 10, a middle fabric layer 20 absorbing the tensile forces and a lower fabric layer 30.
• the side of the upper fabric layer 10 facing away from the middle fabric layer 20 forms the paper side 15 of the fabric belt 1.
• the weft threads 4 run transversely to the longitudinal direction 5 (FIG. 2) of the belt 1.
• the middle, the tensile forces absorbing fabric layer 20 has two mutually offset warp threads 21, 22, which advantageously z. B. run over two wefts 4.
• a preferably additionally arranged lower fabric layer 30 consists of four warp threads 31, 32, 33, 34, each offset with respect to one another, which run inwards - to the middle fabric layer 20 - advantageously via only one weft thread 4 and outwards via advantageously at least three weft threads 4. Other arrangements may be appropriate.
• the three fabric layers 10, 20, 30 in the exemplary embodiment are connected to one another via binding threads 40, 41, 42, 43.
• the binding threads 40, 41, 42, 43 are z. B. divided into two thread groups, the binding threads 42, 43 forming a thread group running offset from one another and binding the upper fabric layer 10 to the middle fabric layer 20.
• the binding threads 42 and 43 can advantageously be alternately guided over a weft thread 4 in the upper fabric layer 10 and a weft thread 4 in the middle fabric layer 20.
• the thread group consisting of the binding threads 40 and 41 binds the lower fabric layer 30 to the middle fabric layer 20 in a corresponding manner.
• the upper fabric layer 10 of the belt 1 forming the paper side 15 is applied with a plurality of strips 25 made of a friction-increasing coating, which is applied in the longitudinal direction 5 of the belt 1 run away from each other and increase the coefficient of friction between the corrugated cardboard and the belt.
• the corrugated cardboard lies largely non-slip and is securely held and fixed in position on the belt 1 during transport. Since the coating strip 25 is narrower than the width of the belt, the vapor permeability is retained despite the coating.
• warp threads 13 ' can also be provided with a friction-increasing coating 25', which then form the friction-increasing coating strip on account of their position in the paper side 15.
• individual warp threads can be inwoven 13 ⁇ with a reibwerter (2014)den coating in the longitudinal direction of the belt or even all 'and / or the weft yarns 4 warp yarns (ll 1, 12', 13 ', 14)' of the paper side 15 carried out with a reibwerter (2014) coating his.
• the warp threads of the paper side lie side by side, but form due to the weaving structure and / or z.
• B. the choice of thread cross-section and also the thread material (monofilaments) not a dense, impermeable coating, but due to gaps between adjacent threads a coating that is permeable to steam, so that moisture can be quickly removed from the paper side.
• At least one warp thread 14 ′′ running in the longitudinal direction 5 of the belt 1 can be arranged, which consists of a cavity-forming thread material, that is to say a different thread material as other warp threads 11, 12, 13 and 14 of the upper fabric layer 10 forming the remaining area of the belt (FIG. 2).
• the individual warp threads 14 ′′ of the paper-forming fabric layer 10 consist of cavity-forming thread material which is connected to drainage channels 50.
• Each drainage channel 50 is preferably provided as a cavity that is mechanically woven into the tissue and extends from the paper side extends away towards the underside of the belt and thus drains the coating-free area of the belt quickly and effectively.
• the cavity 50 preferably opens out on the underside of the belt facing away from the paper side and is in particular designed as a cavity which projects through the belt.
• the cavities 50 are designed in the manner of a drain, through which steam is discharged through the belt 1 from the paper side of the upper fabric layer 10.
• the weft threads 4 'or the warp threads 11', 12 ', 13' and 14 '' advantageously cross mechanically woven-in drainage channels 50.
• the drainage channels 50 are arranged at the points of intersection between the weft threads and the warp threads.
• a cavity-forming thread material z. B a thread material with a high starch content applicable; preferably the thread material consists entirely of starch.
• the void-forming threads made of starch or with a high proportion of starch can be processed like normal threads. They form placeholders in the fabric structure, which dissolve on contact with liquid, especially water.
• the defects resulting from dissolving and washing out the starch from the tissue form drainage channels, drainage channels or the like. , which each open into the mechanically woven drainage channel 50.
• a type of drainage grid is placed in the area between the drainage channels 50, which feeds the resulting liquid directly to the mechanically woven-in drainage channel 50 and thus ensures rapid drainage of the material lying on the fabric belt.
• the warp threads form the cavity-forming thread material after a certain operating time in the longitudinal direction longitudinal channels and weft threads 4 'of such a cavity-forming thread material transverse channels. Since the longitudinal channels and the transverse channels intersect due to the fabric structure (warp threads / weft threads), the transverse channels and the longitudinal channels are connected to one another in a flow-conducting manner. This ensures rapid removal of the liquid.
• Cavity fibers can also be used as the void-forming thread material. Over a longer period of operation, the cavity fibers open due to the wear that occurs, so that their internal cavities themselves form drainage channels which run in the longitudinal direction of the warp or weft threads.
• warp or weft threads of the further fabric layers 20 and 30 made of void-forming thread material can also be provided.
• Individual binding yarns may be provided from hohlraumsentendem filamentary material can be thereby created in the tissue ⁇ structure from one fabric layer 10 extending to the other fabric layer 20 drainage channels.
• a warp thread and / or a weft thread and / or a binding thread is a thread of cavity-forming Thread material added as a by-pass, which later forms the desired drainage channels as a placeholder.
• Fig. 5 shows a schematic representation of a further woven belt 2 in longitudinal section.
• the belt 2 consists of an upper fabric layer 50 and a lower fabric layer 60.
• the upper fabric layer 50 which forms the paper side
• the four warp threads 51, 52, 53 and 54 arranged offset with respect to one another and in the lower fabric layer 60 the four offset with respect to one another arranged warp threads 61, 62, 63, 64.
• the weft threads 6 run transversely to the longitudinal direction 7, the warp threads each running over two weft threads 6.
• the upper fabric layer 50 and the lower fabric layer 60 are woven together by binding threads 44, 45, the binding threads running offset from one another over a weft thread 6 in each case.
• FIG. 6 shows a schematic illustration of the top view of the upper fabric layer
• FIG. 7 shows a schematic illustration of the top view of the lower fabric layer of the same belt section as shown in FIG. 6.
• the four warp threads 51, 52, 53 and 54 are arranged next to one another, and then the two binding threads 44 and 45 are arranged.
• the threads of the lower fabric layer 60 are, as shown in Fig. 7, woven accordingly.
• the warp thread 52 of the upper fabric layer 50 and the warp threads 62 and 64 of the lower fabric layer 60 have a larger diameter than the other warp threads. Drainage channels are thereby formed, the upper fabric layer 50 having more drainage channels than the lower fabric layer 60.
• the drainage channels can also be formed by the thread structure of the warp threads 51 to 54 and 61 to 64.
• the threads can have grooves in their longitudinal direction.
• a belt 3 which has an upper fabric layer 70 and a lower fabric layer 80.
• the warp threads 71 to 74 of the upper fabric layer 70 and the warp threads 81 to 84 of the lower fabric layer 80 run corresponding to the warp threads 51 to 54 and 61 to 64 in FIG. 5.
• the upper fabric layer 70 and the lower fabric layer 80 are over binding threads 46 and 47 interwoven with one another, the binding threads 46, 47 each running over a weft thread 8 of the fabric layers 70 and 80.
• Fig. 9 shows the schematic plan view of the belt 3.
• the warp threads 71 to 74 are woven side by side, followed by the binding threads 46 and 47.
• the drainage channels are formed by omitting every second warp thread sequence of the fabric layer 70, so that the binding threads 46 and 47 again follow binding threads 46 and 47 and this is followed by a further sequence of warp threads 71 to 74.
• the lower fabric layer 80 shown in FIG. 10 as a view of the underside of the belt 3 runs corresponding to the lower fabric layer 60 of the belt 2 shown in FIG. 7, wherein the warp threads 81 to 84 of the lower fabric layer 80 can all have the same diameter.
• thread material with a high temperature resistance in particular para-aramide or Kevlar
• the temperature-resistant thread material can also extend over the entire width of an upper fabric layer 10, 50, 70 or a lower fabric layer 30, 60, 80 or both a lower and an upper fabric layer.
• the drainage channels 50 can also be designed as openings in the weave structure. For this purpose, adjacent warp threads of a fabric layer can be crossed, for example.
• the thread material can consist of 65% polyester and 35% viscose. However, a different composition can also be advantageous. A monofilament is preferably used as the thread material.
• Silicone is preferably used as the material for the friction-increasing strips. Polyurethane can also be advantageous.
• weft or warp threads made of a material with admixed electrically conductive metal fibers, e.g. B. Steel fibers can be provided both in the upper fabric layer, in the fabric layer absorbing the tensile forces or in a further fabric layer, the threads being preferably provided on the paper side. It may be sufficient to form only individual weft and / or warp threads in the paper top from a material containing metal fibers in order to obtain a significant improvement in the antistatic properties of the belt.
• the material properties of the monofilaments can advantageously be used to form drainage channels.
• Monofilaments have an essentially pressure-stable cross-sectional shape, so that - even with a dense, firm weave - the cross-sectional shape hardly changes. This leaves gaps, voids and the like in the weave structure.
• monofilaments with a circular, elliptical or similar cross-sectional shape can be used. These cavities and gaps, even with a tight packing density, are embedded in the weaving structure in such a way that channels leading away moisture are formed from the paper side.

Landscapes

• Woven Fabrics (AREA)
• Paper (AREA)
• Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
• Belt Conveyors (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
• Waveguide Connection Structure (AREA)
• Inorganic Insulating Materials (AREA)

Applications Claiming Priority (1)

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• 2003
  • 2003-09-16 AU AU2003267366A patent/AU2003267366A1/en not_active Abandoned
  • 2003-09-16 EP EP20030748033 patent/EP1664410B1/fr not_active Expired - Lifetime
  • 2003-09-16 JP JP2005509414A patent/JP4630818B2/ja not_active Expired - Fee Related
  • 2003-09-16 ES ES03748033T patent/ES2337675T3/es not_active Expired - Lifetime
  • 2003-09-16 AT AT03748033T patent/ATE450639T1/de active
  • 2003-09-16 WO PCT/EP2003/010271 patent/WO2005035846A1/fr active Application Filing
  • 2003-09-16 DE DE50312198T patent/DE50312198D1/de not_active Expired - Lifetime
• 2006
  • 2006-03-14 US US11/308,247 patent/US20060228961A1/en not_active Abandoned

Non-Patent Citations (1)

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