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WO2000017074A1 - Transporteur a courroie s'utilisant dans une courbure de courroie actionnee par moteur - Google Patents

Transporteur a courroie s'utilisant dans une courbure de courroie actionnee par moteur Download PDF

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Publication number
WO2000017074A1
WO2000017074A1 PCT/IB1999/001608 IB9901608W WO0017074A1 WO 2000017074 A1 WO2000017074 A1 WO 2000017074A1 IB 9901608 W IB9901608 W IB 9901608W WO 0017074 A1 WO0017074 A1 WO 0017074A1
Authority
WO
WIPO (PCT)
Prior art keywords
belt
cord
resin
fabric
coating
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.)
Ceased
Application number
PCT/IB1999/001608
Other languages
English (en)
Inventor
John William Hawkins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TEBBIT ANTONY HUGH EDWARD
Georgia Duck and Cordage Mill
Original Assignee
TEBBIT ANTONY HUGH EDWARD
Georgia Duck and Cordage Mill
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TEBBIT ANTONY HUGH EDWARD, Georgia Duck and Cordage Mill filed Critical TEBBIT ANTONY HUGH EDWARD
Priority to AU57552/99A priority Critical patent/AU5755299A/en
Publication of WO2000017074A1 publication Critical patent/WO2000017074A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D29/00—Producing belts or bands
    • B29D29/06—Conveyor belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/583—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features
    • B29C53/585—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features the cross-section varying along their axis, e.g. tapered, with ribs, or threads, with socket-ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/02—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration for conveying in a circular arc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
    • B29L2031/7092—Conveyor belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/06—Articles and bulk

Definitions

  • This invention relates to a method of making and a structure for a conveyor belt for use in a powered belt turn for conveying objects from a conveyor belt oriented in one direction to a conveyor belt oriented in a different direction.
  • Conveyor belts for use in a powered belt turn are known in the art.
  • U.S. Patent No. 5,667,058 which teaches a powered belt turn for conveying parcels and the like through an arcuate path from an input conveyor to an output conveyor.
  • Such devices use a frusto-conically shaped conveyor belt disposed in a flattened condition and supported on a pair of end rollers, either or both of which may be powered for rotation. Because of the shape of such belts and the conveyor elements with which they are used, such belts tend to move laterally toward their shorter side. It is therefore necessary to use some means of resisting this movement.
  • 5,667,056 illustrates and describes use of a bead along the shorter belt edge, which bead bears against a "track belt retainer" or sheaves.
  • a turn belt may have a bead or other structure on its longer edge which is captured between rollers or within other structure that restrains the belt from moving laterally. It is known in the art to make such conveyor belts for belt turns by cutting wedge shaped segments of prefabricated belting material and attaching the segments together by sewing, gluing, welding or the like to form a closed frusto-conical belt.
  • the present invention provides a seamless turn belt.
  • the invention extends to a seamless conveyor belt having the shape of a frusto-conical surface, and it further comprises a belt for use in a belt turn, comprising a substantially continuous cord wound on a frusto- conical surface.
  • the invention also includes a method of making a belt for use in a powered belt turn, comprising the steps of:
  • This invention may thus be summarised as a method of making a seamless frusto-conical conveyor belt for use in a powered belt turn and the resulting improved belt.
  • the seamless belt is suitably fabricated on a cone-shaped form or mandrel.
  • this invention is practised by wrapping, or otherwise placing a fabric core on a cone-shaped mandrel, winding a cord on the outer surface of the fabric core, impregnating the cord windings and fabric core with a polymer resin, allowing the resin to cure, and removing the belt from the mandrel.
  • the core fabric may be a relatively inexpensive non- woven fabric such as felt.
  • the cord is polyester cord
  • the polymer resin is preferably polyurethane resin.
  • the fabric can be first formed as a knitted, woven or non- woven sock, and the sock can then be put on the mandrel to receive the cord winding and/or the polymer resin.
  • a cone shaped mandrel surface having the size and desired shape of the belt is covered with the fabric or the sock to form a frusto-conical fabric core which will become the inside surface of the belt.
  • one or more cords are wound onto the fabric core in a spiral by rotating the mandrel and fabric core and winding the cord on top of the fabric core, usually beginning at the smaller end of the fabric core and continuing to its larger end.
  • the resin is sprayed onto the surface of the cord windings to impregnate the cord and underlying fabric core.
  • a thin coating of excess resin may be deposited on the cord windings to serve as the surface of the belt.
  • the resin is allowed to cure to form a composite belt, and the belt is removed from the mandrel.
  • resin may be sprayed on the surface of the fabric core to impregnate the felt.
  • a thin coating of excess resin may be deposited on the fabric core and allowed to partially cure to a tacky condition.
  • the cord can then be wound on top of the tacky resin to improve adhesion between the fabric core and the cord.
  • the resin is sprayed onto the surface of the cord windings to impregnate the cord and to apply a relatively thin coating of excess resin to serve as the belt surface.
  • the resin is likewise allowed to cure, and the belt is removed from the mandrel.
  • a plurality of elongate stiffening members or battens of fibreglass, wood, plastic or metal may be affixed to the belt by an adhesive such as glue or hot melt.
  • a relatively thin additional coating of resin may be sprayed on the belt and the battens to serve as the belt surface.
  • the resin is likewise allowed to cure, and the belt is removed from the mandrel.
  • radial reinforcement can be achieved by depositing resin on the belt in radially extending profiles or by cutting a thick resin layer to form profiles.
  • a relatively thicker coating of resin can be formed on the surface of the cord winding. The coating is partly slit along the radial direction to define elongated, relatively stiff profiles between the slits that serve as battens.
  • the invention can be practised without use of cord by wrapping a fabric core or putting a sock-shaped fabric core on a cone-shaped mandrel, impregnating the fabric core with a polymer resin (preferably polyurethane resin) and forming a coating to serve as the belt surface, allowing the resin to cure, and removing the belt from the mandrel. Battens may then be affixed to the belt. Or, alternatively, the coating may be slit before cure to form profiles serving as battens or radial stiffeners.
  • a polymer resin preferably polyurethane resin
  • This invention provides a method of making seamless frusto-conical conveyor belts for use in a powered belt turn that are relatively inexpensive and easy to practice, yet which provides a conveyor belt which is strong, durable and long- wearing.
  • Figure 1 is a perspective view of a conveyor belt made according to the method of the present invention supported in a flattened condition on rollers of a power belt turn.
  • Figure 2 is a schematic perspective view of the step of putting a fabric sock on the surface of the cone-shaped mandrel.
  • Figure 3 is a schematic perspective view of the step of winding a cord on the outer surface of a frusto-conical non-woven fabric core after wrapping the non-woven fabric on the cone-shaped mandrel according to the method of this invention.
  • Figure 4 is a schematic perspective view of the step of impregnating the cord windings and fabric core with a polymer resin using a power sprayer according to the method of this invention.
  • Figure 5 is a schematic perspective view of the step of depositing a coating with a polymer resin using a computer controlled power sprayer according to the method of this invention.
  • Figure 6 is a perspective view of the belt structure of resin- impregnated cord windings and fabric core after allowing the resin to cure with a plurality of stiffening members affixed to the belt structure.
  • Figure 7 is a partial cross-sectional view of the belt structure showing the resin impregnated fabric layer and the resin impregnated cord layer with a coating of resin on the cord windings .
  • Figure 8 is a partial cross-sectional view of the belt structure depicted in Figure 1.
  • Figure 9 is a partial cross-sectional view of a first alternative embodiment of the belt structure of this invention.
  • Figure 10 is a partial cross-sectional view of a second alternative embodiment of the belt structure of this invention.
  • Figure 11 is a partial cross-sectional view of a third alternative embodiment of the belt structure of this invention.
  • Figure 12 is a perspective view of the step of impregnating the cord windings and fabric core with a polymer resin using a hand sprayer according to the method of this invention.
  • Figure 13 is a perspective view of a conveyor belt with radial stiffening provided by a slit outer plastic layer.
  • Figure 14 is a partial cross-sectional view of the belt structure shown in Figure 13 showing the belt positioned on a turn belt roller.
  • Figure 15 is a partial cross-sectional view of the structure of this invention showing a bead on the outer rim of the belt.
  • Figure 16 is a plan view of a sheet of non-woven fabric for wrapping on the surface of a cone-shaped mandrel.
  • Figure 17 is a partial cross-sectional view of a belt structure of this invention showing leno fabric being used to reinforce the outer edge of the belt.
  • a conveyor belt 10, made according to one embodiment of the present invention is shown in use supported on rollers 12, 14 of a powered conveyor belt turn (not more fully shown) to define an arcuate path or turn between straight sections of conveyor belts 16, 18, which are arranged at an angle relative to one another.
  • One or both of the rollers 12, 14 is powered for rotation.
  • Curved conveyor belt 10 is frusto-conically shaped and is supported in a substantially flattened configuration on rollers 12, 14 for rotation by the rollers. While conveyor belt 10 is shown in a powered conveyor belt turn of 90 degrees, it will be readily apparent to those skilled in the art that any angular displacement between zero and 180 degrees may be accommodated by a suitably shaped conveyor belt made according to the method of the present invention.
  • one structure for conveyor belt 10 comprises a polymer resin-impregnated non- woven fabric layer 16 and a polymer resin-impregnated layer of cord windings 18.
  • Conveyor belt 10 may also have a coating of polymer resin 22 on cord layer 18, to provide a flexible belt surface that resists abrasion, impact and weather or other destructive conditions. Stiffening Battens
  • conveyor belt 10 When the powered belt turn is operating, if the belt 10 is restrained at its inner edge 24, radial forces are exerted on that inner edge 24. In order to transfer such forces radially across conveyor belt 10 and resist tendencies for it to wrinkle (and improve load transfer efficiency of conveyor belt 10 by increasing friction between conveyor belt 10 and the load), conveyor belt 10 may be provided with a plurality of stiffening members or battens 26 extending radially from inner edge 24, which are affixed by a suitable adhesive 28 as shown in Figs. 1, 6 and 8. Also, as shown in Fig. 8, conveyor belt 10 may have an additional coating of polymer resin 30 atop coating 22 and battens 26, likewise to provide a flexible and abrasion, impact and weather resistant belt surface.
  • the structure of the belt 10 can take a number of forms, illustrative examples of which are shown in Figs. 7 to 11 inclusive.
  • conveyor belt 10 is provided with a polymer resin-impregnated non- woven fabric layer 16 and a polymer resin-impregnated layer of cord windings 18.
  • a coating of polymer resin 22 is applied on cord layer 18 with profiles 27.
  • Polymer resin coating 22 is stiff only in radial directions.
  • profiles 27 function as battens 26 shown in Fig. 8 to transfer radial forces across conveyor belt 10.
  • Such elongated, thickened regions of resin may be formed, for instance, by controlling a flow 80 of polymer resin 22 as illustrated in Fig. 5 to supply resin intermittently as mandrel 35 rotates so that a series of thicken regions alternate with thinner regions.
  • polymer application head 76 can be traversed longitudinally while mandrel 35 is stationary so that a ribbon of polymer resin 22 is laid down in a radial direction.
  • cord layer 18 is utilised to provide reinforcement for conveyor belt 10. Because battens 26 or profiles 27 are radially distributed, they cross over the cord windings 18 substantially perpendicular to each other. This structure further enhances the overall strength of the conveyor belt 10.
  • Fig. 10 shows conveyor belt 10 is provided with a polymer resin- impregnated non- woven fabric layer 16 and a coating of polymer resin 22 deposited on fabric layer 16. Such a belt structure omitting cord layer 18 is suitable for light duty application. Also, battens 26 may be affixed atop coating 22. Moreover, additional coating of polymer resin 30 may be applied atop coating 22 and battens 26.
  • Fig. 11 shows a belt 10 structure provided with a polymer resin- impregnated non- woven fabric layer 16 and a coating of polymer resin 22 deposited on fabric layer 16 and optional profiles 27.
  • the fabric layer 16 is preferably a porous non- woven fabric such as polyester felt. Alternatively, nylon or aramid can also be used to make layer 16. A basic requirement for choosing the material for the layer 16 is that material preferably is no or low-stretch.
  • Cord layer 18 may be a relatively high tensile strength cord such as polyester cord.
  • Polyester cord may be multi-filament, staple filament, or a blend of multi-filament and staple filament.
  • Aramid or nylon may also be used for cord layer 18.
  • the range of the strength of material generally suitable for cord layer 18 is about 20 to 200 pound per inch (3.5 to 35 x 10 3 N/m) . While exceptional success has been experienced by the use of polyester cord for the cord windings and polyurethane resin for impregnating the cord windings and fabric core, any number of other materials may also be used.
  • nylon or aramid cord may be used as an alternative to polyester cord for the cord windings
  • PVC or rubber elastomer may be used as an alternative to polyurethane resin for impregnating the cord windings and felt core.
  • Polymer resin 22 may be a material such as polyurethane compounds which are flexible, abrasion resistant, impact resistant, weather resistant, and can be applied, for example, by spraying, dipping, flowing or brushing as a single component or as a two-part formulation.
  • Polyurethane systems useful for this invention include BAYTECTM SPR (either type 85A or type 85B) manufactured by Bayer Corporation at.
  • the BAYTECTM SPR is a two package polyurethane having a MDI isocyanate base polymer (as component A) and a polyol (as component B) .
  • VIBRASPRAYTM SPR (either type 80A or type 80B) manufactured by UNIROYAL CHEMICALTM.
  • the VIBRASPRAYTM SPR also is a two package polyurethane but having a TDI isocyanate base polymer (as component A) and an amine base crosslinker (as component B) .
  • TDI isocyanate base polymer as component A
  • amine base crosslinker as component B
  • Numerous variations of these or similar products from these two companies or other polyurethane suppliers can also be used to practice the invention, as can other material and synthetic rubbers.
  • Battens 26 may be made of rigid or semi-rigid material such as fibreglass, wood, plastic, or metal. However, the fabric and cord layers, the resin, or the battens may also be any other suitable natural or synthetic materials having similar properties. Battens 26 may be strips, rods or bars having round, oval, square, rectangular or other cross-sectional shapes.
  • Mandrel 35 may be fabricated of metal, fibre reinforced polymer materials or any other suitable material or combination of materials that produce a reasonably sturdy structure having the required geometry and dimensions to produce a desired belt 10 size and shape.
  • mandrel 35 must be sufficiently sturdy to withstand the wear it will experience during typical manufacturing operations, and must be sufficiently light in weight to make it practical to rotate and otherwise move the mandrel 35 as required during use.
  • the surface 36 of mandrel 35 should be relatively smooth and should be suitable for use with the particular polymer resins and release agents, if any, employed in manufacturing belt 10 without unacceptable adhesion of resin or other materials.
  • the surface of mandrel 36 may be a polished metal surface.
  • Fig. 2 depicts positioning a somewhat porous sheet of fabric (such as felt 34 cut as shown in Fig. 16 or a woven, knitted or otherwise formed "sock" 37), on a conical-shaped mandrel 35 having a mandrel surface 36 to form a frusto-conical fabric core 38 having an outer surface 40 with upper and lower margins 42, 44.
  • upper and lower margins 42, 44 of sock 37 and fabric 34 are arcuate, and upper margin 42, corresponding to inner edge 24 of belt 10 as shown in Fig. 1 , is shorter than lower margin 44.
  • Sheet 34 also has a pair of abutment edges 50, 52 which abut one another when the sheet 34 is wrapped on mandrel surface 36 to form fabric core 38.
  • sock 37 can be made with the desired size and shape to fit mandrel 35, its use saves time and labour which would be used to prepare and wrap sheet 34 on mandrel 35.
  • Sock 37 may be made by, for instance, using conventional circular weaving or knitting processes. If sock 37 is knitted or woven, core 38 will not be a "non-woven material" as it is in some of the embodiments described herein.
  • a relatively high tensile strength cord such as polyester cord 60
  • a relatively high tensile strength cord such as polyester cord 60
  • Mandrel 35 is supported on a shaft 54 which extends from a supporting structure 56 and is rotated by a turn motor 58, as shown in Fig. 3, to wind cord 60 on fabric core 38.
  • Cord 60 is supplied from one or more spools 66, 68, and cord supply 62 may include a tensioning assembly 70 to maintain a desired level of tension on cord 60 as it is wound on outer surface 40.
  • a yarn guide fork 72 may be interposed between spools 66, 68 and fabric core 38 to guide and maintain proper alignment and parallel relationship between separate strands of cord 60.
  • Cord 60 is wound on outer surface 40 by activating turn motor 58 to rotate mandrel surface 36 and outer surface 40 relative to cord supply 62.
  • the winding typically begins at or near upper margin 42 and continues spirally to a point at or near lower margin 44 to form plurality of cord windings 64 extending between upper and lower margins 42, 44. Winding could also begin at other points on mandrel surface 36. It has been found advantageous to wind cord 60 with outer surface 40 disposed substantially perpendicular to a path 74 of cord 60, for example, by tilting mandrel surface 36 at an angle on supporting structure 56 relative to path 74 as shown in Fig. 3.
  • cord windings 64 and underlying fabric core 38 are impregnated with a polymer resin such as polyurethane which cures rapidly under ambient conditions and provides flexibility, abrasion resistance, impact resistance, and weather resistance and which can be applied as a liquid in single or multiple component form.
  • a polymer resin such as polyurethane which cures rapidly under ambient conditions and provides flexibility, abrasion resistance, impact resistance, and weather resistance and which can be applied as a liquid in single or multiple component form.
  • the polyurethane resin is applied as a spray 74 propelled onto cord windings 64 by a power sprayer 76 to fully impregnate both the cord windings 64 and the underlying fabric core 38 and to deposit a relatively thin coating of excess resin on the outer surface of cord windings 64 sufficient to form the coating of resin 22 on cord layer 18, as shown in Fig. 7, which serves as the surface of belt 10.
  • Power sprayer 76 may be mounted to be moveable on an elongate supporting guide assembly 78 which is disposed substantially parallel to mandrel surface 36 to maintain a constant distance from cord windings 64 as power sprayer 76 is moved on supporting guide 78.
  • power sprayer 76 may be activated with the spray 74 directed, for example, toward the area of upper margin 42, and at the same time, turn motor 58 can be activated to rotate mandrel surface 36 relative to power sprayer 76.
  • the power sprayer 76 can then be moved along supporting guide assembly 78 toward lower margin 44 as mandrel surface 36 rotates.
  • the resin may also be applied by other means such a hand held sprayer 80, as shown in Fig. 12, or, for example, by brushing or dipping.
  • the resin may also be applied using a ribbon flow, as illustrated in Fig. 5 and in any other effective manner.
  • the polyurethane resin is allowed to cure under ambient conditions to form a composite frusto-conical belt structure of the resin-impregnated cord windings 64 and fabric core 38.
  • the frusto-conical belt is thereafter removed from mandrel surface 36 for use as conveyor belt 10 supported on rollers 12, 14, as shown in Fig. 1 , of the powered conveyor belt turn.
  • fabric core 38 may be impregnated with the polyurethane resin by spraying or otherwise applying the resin on fabric core 38 to fully impregnate fabric core 38 and to deposit a relatively thin coating of excess resin on the outer surface of the fabric core 38. Thereafter, the resin may be allowed to partially cure to a tacky condition before the winding step, and cord 60 can be wound on the tacky surface of the partially cured resin coating. After the winding step, cord windings 64 are likewise impregnated with the resin in the same or another appropriate manner, and the resin is allowed to cure to form the composite belt structure, which is then removed from mandrel surface 36.
  • cord or yarn 60 is wound onto a frusto-conical surface so that a belt 10 core is provided with windings 64 that run around the frusto-conical surface and thereby provide belt 10 core structure in the form of strands running substantially parallel to the belt 10 edges 11 and 13.
  • cords 60 are not essential; even fabric core 38 could be omitted when, for instance, resin 22 alone is applied to cure on mandrel 35 into a sufficiently durable layer to be used as a seamless frusto-conical turn belt 10.
  • stiffening members or battens 26 may be affixed on the coating of resin 22 by adhesive 28 as shown in Figs. 6 and 8 to stiffen belt 10 radially. Battens 26 are spaced apart from one another and substantially perpendicular to upper margin 42 and attached with a suitable adhesive material 28 such as glue or hot melt. After affixing the plurality of battens 26, a relatively thin coating of resin is deposited on battens 26 and resin coating 22 by spraying the resin in the same manner to form the additional coating of resin 30, as shown in Fig. 8, which serves as the surface of belt 10. Thereafter, the resin is likewise allowed to cure, and the belt 10 is removed from mandrel surface 36.
  • a thicker coating layer 22 is deposited over cord windings 64.
  • the coating layer 22 then is slit radially after the resin 22 cures so that the coating layer 22 is stiff only in radial directions.
  • a resultant belt 10 is shown in Fig. 13.
  • profiles 27 close against each other after passing over roller 14, providing a relatively smooth conveyor surface.
  • sprayer 76 may be controlled by a computer controller 82, as shown in Fig. 5. Controller 82 can be programmed to deposit a polyurethane coating 22 with a pattern of ribs or profiles 27 in situ. The rotation of mandrel 35 is controlled by controller 82. The motion of power sprayer 76 is also controlled by controller 82. The rate of the resin 22 application is also controlled by controller 82.
  • a rim bead 92 (See Fig. 15) or other edge structure can be attached to or formed on one or both of edges 11 or 13, using processes known in the art where such a bead is desired for engagement, for instance, by structure 94 on a powered belt turn to retain or "trap" bead 92, as shown in Fig. 15, to prevent unwanted lateral movement of belt 10 on the belt turn.
  • Leno fabric can also be used to reinforce the outer edges 11 or 13.
  • a leno fabric strip 96 as shown in Fig. 17, can be interposed between cord layer 18 and underlying fabric layer 16. After polyurethane layer 22 is deposited over cord layer 18, another leno fabric strip 98 may be then applied to the polyurethane layer 22. Polyurethane layer 22 and cord layer 18 are effectively sandwiched by the two leno fabric strips along the border so that the outer edges 11 or 13 are reinforced.
  • Figs. 10 and 11 may be useful.
  • polyurethane resin may be directly applied to the outer surface 40 of fabric 34 to form a coating layer 22.
  • Optional profiles 27 may be formed of resin as shown in Fig. 11, or battens 26 may be applied.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Belt Conveyors (AREA)

Abstract

L'invention concerne une courroie de transporteur sans couture pour courbure de courroie (10) actionnée par moteur, qui est façonnée sur un mandrin (35) en forme de cône. Le procédé de fabrication de cette courroie comporte les étapes consistant à positionner un tissu sur une surface (36) de mandrin en forme de cône pour former un noyau (38) de tissu tronconique, enrouler de la corde (60) sur la surface (40) extérieure du noyau de tissu de façon à former plusieurs enroulements (64) de corde, imprégner les enroulements de corde et le noyau de tissu à l'aide d'une résine polymère, laisser cuire la résine pour former une structure de courroie composite constituée des enroulements de corde et du noyau de tissu imprégnés de résine, et enlever la courroie du mandrin. Des traverses ou profilés facultatifs peuvent renforcer la courroie latéralement. Les enroulements de corde ou le noyau de tissu peu(ven)t être supprimé(s).
PCT/IB1999/001608 1998-09-22 1999-09-22 Transporteur a courroie s'utilisant dans une courbure de courroie actionnee par moteur Ceased WO2000017074A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU57552/99A AU5755299A (en) 1998-09-22 1999-09-22 Conveyor belt for use in a powered belt turn

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15804198A 1998-09-22 1998-09-22
US09/158,041 1998-09-22

Publications (1)

Publication Number Publication Date
WO2000017074A1 true WO2000017074A1 (fr) 2000-03-30

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PCT/IB1999/001608 Ceased WO2000017074A1 (fr) 1998-09-22 1999-09-22 Transporteur a courroie s'utilisant dans une courbure de courroie actionnee par moteur

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WO (1) WO2000017074A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7931554B2 (en) 2006-12-26 2011-04-26 Tri Corp. Endless belt
US8157685B2 (en) 2009-04-01 2012-04-17 Apache Hose & Belting Co., Inc. Endless belt with binder for carcass stability
CN113942280A (zh) * 2021-11-10 2022-01-18 上海永利输送系统有限公司 一种转弯机用输送带的制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2063201A (en) * 1979-11-06 1981-06-03 Fenner & Co Conveyor apparatus
JPS5729841A (en) * 1980-07-24 1982-02-17 Shigeaki Murakami Seamless flat belt
US5667056A (en) 1995-06-06 1997-09-16 Sears, Roebuck And Co. Hanger transport system
US5667058A (en) 1995-04-27 1997-09-16 United Parcel Service Of America, Inc. Powered conveyor belt turn
JPH10218325A (ja) * 1997-02-10 1998-08-18 Atsusato Kitamura ターンベルト
JPH1191918A (ja) * 1997-09-18 1999-04-06 Atsusato Kitamura ターンベルトおよびその製造法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2063201A (en) * 1979-11-06 1981-06-03 Fenner & Co Conveyor apparatus
JPS5729841A (en) * 1980-07-24 1982-02-17 Shigeaki Murakami Seamless flat belt
US5667058A (en) 1995-04-27 1997-09-16 United Parcel Service Of America, Inc. Powered conveyor belt turn
US5667056A (en) 1995-06-06 1997-09-16 Sears, Roebuck And Co. Hanger transport system
JPH10218325A (ja) * 1997-02-10 1998-08-18 Atsusato Kitamura ターンベルト
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