US20150328852A1 - Method of applying ply to a tire building drum - Google Patents
Method of applying ply to a tire building drum Download PDFInfo
- Publication number
- US20150328852A1 US20150328852A1 US14/809,795 US201514809795A US2015328852A1 US 20150328852 A1 US20150328852 A1 US 20150328852A1 US 201514809795 A US201514809795 A US 201514809795A US 2015328852 A1 US2015328852 A1 US 2015328852A1
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- US
- United States
- Prior art keywords
- ply
- conveyor
- tire
- support
- sheet
- 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.)
- Abandoned
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Classifications
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- 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
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
- B29D30/16—Applying the layers; Guiding or stretching the layers during application
-
- 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
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/0016—Handling tyres or parts thereof, e.g. supplying, storing, conveying
-
- 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
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/30—Applying the layers; Guiding or stretching the layers during application
-
- 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
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/30—Applying the layers; Guiding or stretching the layers during application
- B29D30/3007—Applying the layers; Guiding or stretching the layers during application by feeding a sheet perpendicular to the drum axis and joining the ends to form an annular element
-
- 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
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/0016—Handling tyres or parts thereof, e.g. supplying, storing, conveying
- B29D2030/0038—Handling tyre parts or semi-finished parts, excluding beads, e.g., storing, transporting, transferring
-
- 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
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
- B29D30/16—Applying the layers; Guiding or stretching the layers during application
- B29D2030/1664—Details, accessories or auxiliary operations not provided for in the other subgroups of B29D30/00
- B29D2030/1685—Details, accessories or auxiliary operations not provided for in the other subgroups of B29D30/00 the layers being applied being already cut to the appropriate length, before the application step
-
- 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
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
- B29D30/44—Stretching or treating the layers before application on the drum
- B29D2030/4406—Adjusting the positions of the layers
- B29D2030/4418—Adjusting the positions of the layers laterally, e.g. sideways
Definitions
- the invention relates in general to the art of tire building, and more specifically to the applying of tire sheet components such as, but not limited to, tire ply, inner liner or sidewall directly onto a cylindrical body such as a tire building drum.
- Tire ply or other rubber components are often applied to a tire building drum with a conveyor type device often referred to as an applier.
- Prior art appliers typically utilize a conveyor type belt to precisely apply the tire component onto the tire building drum. It is important to precisely control the application of the tire component onto the drum, and is particularly of concern for the tail end of the component. It is also important that the component be applied quickly and efficiently as possible.
- the applier must also retract sufficiently from the drum to provide clearance for other mechanisms and functions. Further, prior art appliers typically require a separate drive and adjustment mechanism in order to make applier adjustable to different sizes of tire building drums.
- the ply size is very large and heavy.
- the ply size can range from about 8 feet by 8 feet to about 10 feet by 10 feet.
- the weight can vary from about 1700 lbs to 2200 pounds.
- the ply Prior to application to the tire building drum, the ply is typically wound up onto a spindle of a cart for application onto an applier conveyor system.
- the ply is typically wound in such a manner that it is not centered with respect to the frame.
- the ply is delivered onto the applier server so that it is not aligned square to the server and thus will be misaligned with the tire building drum.
- a tire ply server is needed that ensures that the ply delivered to the tire building drum in a properly aligned condition with respect to the drum such that the leading edge of the ply is square to the drum, and that the center of the ply is aligned with the drum centerline, and also that the ply cords are straight and square to the drum centerline.
- a method for applying a sheet of flexible material to a cylindrical body is described.
- the sheet of material may be ply or a tire building component such as a liner.
- the method includes the steps of receiving the sheet of flexible material onto a conveyor belt of a conveyor table, wherein the conveyor belt can translate in the X direction, wherein the conveyor belt has a plurality of rollers rotatably mounted on the conveyor belt so they can rotate about an axis aligned with the X direction.
- the method further includes aligning a lateral edge of the sheet with an edge guide of the conveyor table by tilting the conveyor table and then tilting the conveyor table back to a level position.
- the method further includes moving a front edge of the conveyor table adjacent the cylindrical body; and applying the sheet onto the cylindrical body.
- Axial and “axially” means the lines or directions that are parallel to the axis of rotation of the tire.
- Bead or “Bead Core” means generally that part of the tire comprising an annular tensile member, the radially inner beads are associated with holding the tire to the rim being wrapped by ply cords and shaped, with or without other reinforcement elements such as flippers, chippers, apexes or fillers, toe guards and chafers.
- Belt Structure or “Reinforcing Belts” means at least two annular layers or plies of parallel cords, woven or unwoven, underlying the tread, unanchored to the bead, and having both left and right cord angles in the range from 17° to 27° with respect to the equatorial plane of the tire.
- “Bias Ply Tire” means that the reinforcing cords in the carcass ply extend diagonally across the tire from bead-to-bead at about 25-65° angle with respect to the equatorial plane of the tire, the ply cords running at opposite angles in alternate layers
- Carcass means a laminate of tire ply material and other tire components cut to length suitable for splicing, or already spliced, into a cylindrical or toroidal shape. Additional components may be added to the carcass prior to its being vulcanized to create the molded tire.
- “Circumferential” means lines or directions extending along the perimeter of the surface of the annular tread perpendicular to the axial direction; it can also refer to the direction of the sets of adjacent circular curves whose radii define the axial curvature of the tread as viewed in cross section.
- Core means one of the reinforcement strands, including fibers, which are used to reinforce the plies.
- Inner Liner means the layer or layers of elastomer or other material that form the inside surface of a tubeless tire and that contain the inflating fluid within the tire.
- “Inserts” means the reinforcement typically used to reinforce the sidewalls of runflat-type tires; it also refers to the elastomeric insert that underlies the tread.
- “Ply” means a cord-reinforced layer of elastomer-coated, radially deployed or otherwise parallel cords.
- Ring and radially mean directions radially toward or away from the axis of rotation of the tire.
- Ring Ply Structure means the one or more carcass plies or which at least one ply has reinforcing cords oriented at an angle of between 65° and 90° with respect to the equatorial plane of the tire.
- Ring Ply Tire means a belted or circumferentially-restricted pneumatic tire in which the ply cords which extend from bead to bead are laid at cord angles between 65° and 90° with respect to the equatorial plane of the tire.
- “Sidewall” means a portion of a tire between the tread and the bead.
- Laminate structure means an unvulcanized structure made of one or more layers of tire or elastomer components such as the innerliner, sidewalls, and optional ply layer.
- FIG. 1 is a side view of a ply server of the present invention shown together with a tire building machine and a ply cart;
- FIG. 2 is a top view of the system of FIG. 1 ;
- FIG. 3A is a side view of the ply server and a tire building drum shown in a first position
- FIG. 3B is a side view of the ply server and a tire building drum shown in an application position
- FIG. 4 is a side view of a leg support of the ply server shown in an angled position.
- FIG. 5 is a side view of the leg support of the ply server of FIG. 4 in the direction 5 - 5 .
- FIG. 6 is a close up perspective view of the circled portion of FIG. 4 ;
- FIG. 7 is an exploded view of the leg support.
- FIG. 8 is a close up view of the circled portion of FIG. 3B ;
- FIG. 9A is a close up view in the direction 9 - 9 of FIG. 8 ;
- FIGS. 9B-9D illustrate the foot and support legs in an upright position ( FIG. 9B ), a tilted to the right position ( FIG. 9C ) and a tilted to the left position ( FIG. 9D )
- FIG. 9E is a perspective view of the foot and support legs in the direction of 9 E- 9 E of FIG. 9C .
- FIG. 10 is a rear view of the ply server in the direction 10 - 10 of FIG. 1 ;
- FIG. 11 is a rear view of the ply server shown tilted in a first direction
- FIG. 12 is a front view of the ply server shown tilted in a second direction opposite the first direction;
- FIG. 13 is a side view of the support frame and support legs of the ply server.
- FIG. 14 is a top view of the support frame and support legs, as shown in FIG. 13 .
- FIGS. 1-14 illustrate a first embodiment of a tire component applier 10 of the present invention.
- the tire component applier 10 functions to properly align a tire component such as tire ply or tire liner with respect to a tire building machine or drum 5 , and then apply the tire component onto the tire building drum.
- a tire component such as tire ply or tire liner
- this can be extremely difficult because the tire ply itself can weigh in the range of 1000 to 2000 pounds, and have a size on the order of 10 feet by 10 feet.
- the tire component applier 10 ensures the cords are straight and perpendicular to the tire building drum axis in the case of a radial tire, and that the front edge of the tire ply is square or perpendicular to the tire building drum.
- the tire component applier 10 comprises a stationary support frame 20 .
- the support frame 20 as best shown in FIGS. 13-14 is a rectangular shaped support comprised of four support beams 22 , 23 and one or more cross beams 24 .
- Support beams 22 , 24 may be mounted to the floor or other support structure.
- Two of the parallel support beams 22 have a rail 26 mounted on the upper surface of the support beam for allowing the tire applier to slide fore and aft, as described in more detail, below. It is preferred that at least one of the support rails 23 have a double rail 26 , as described in more detail, below.
- the tire applier 10 further comprises four support legs 31 , 32 , 33 , 34 which support a conveyor table 40 .
- Each support leg has an outer telescoping portion 31 a , 32 a , 33 a , 34 a which slides over inner leg portion 31 b , 32 b , 33 b , 34 b .
- the inner leg portions therefore slide within the respective outer leg portions on collar bearing 70 .
- each inner leg portion has a flanged end 37 having a center hole 38 for receiving a ball joint 39 therein.
- the ball joint 39 is received within center hole 38 and is rotatably mounted against adjacent bearings 39 b .
- the bearings 39 b are contained between a pair of flanged ends 43 mounted on a foot 45 .
- Each foot 45 has a linear bearing 47 which slides on rail 26 ( FIG. 9 ), so that the entire applier can slide fore and aft along its major axis (X axis).
- X axis major axis
- at least one of the feet 45 is connected to a chain 27 via a chain connector 29 .
- the chain 27 is driven by a gear 28 connected to a servo motor (not shown), which slides the entire applier 10 fore and aft along support rails 26 .
- one of the support beams 23 have two parallel rails 26 mounted thereon.
- Support beam 23 has a single rail 26 .
- the support legs 33 , 34 slide fore and aft on beam 23 and are shown in FIGS. 8-9 .
- Support legs 31 , 32 preferably ride on double rails 26 mounted on beam 22 and are slightly different in construction as shown in FIGS. 9B-9D .
- Support legs 31 , 32 have modified feet 90 that allow the support legs to translate fore and aft on two support rails 26 in the X direction, and further allow for translation in the Z direction (perpendicular to the rail axis).
- Each support leg 31 , 32 has a foot 90 having spaced flanged ends 92 which receive the flanged ends 37 of support legs and the ball joint 39 .
- Each foot also has a linear bearing 94 which slides on lateral rail 98 to allow the table to translate a small amount in the Z direction (direction of table minor axis).
- Lateral rail 98 is mounted on platform 100 which has two linear bearings 102 , 104 mounted on the underside opposite the lateral rail 90 , for sliding on double rails 26 .
- FIG. 9B illustrates the support leg in a straight position
- FIG. 9C illustrates the foot slid laterally outward in the Z direction when the table is tilted outwardly.
- FIG. 9D illustrates the foot which has partially slid outward in the Z direction when the table is tilted inwardly.
- the conveyor table 40 is structurally supported by a table support 50 which includes two parallel support members 52 , 53 joined by two parallel cross supports 54 in a rectangular configuration.
- a first support member 52 has opposed ends which are fixedly connected to outer portion of support legs 31 a and 34 a via support brackets 36 .
- a second support member 53 has opposed ends which are fixedly connected to the outer portion of support legs 32 a and 33 a via support brackets 36 .
- Cross members 54 provide increased frame rigidity and structural support.
- a first portion 42 of the conveyor table 40 is connected to the table support 50 via fasteners (not shown).
- a second portion 44 of the conveyor table is cantilevered, and extends from the table support 50 so that the ply can be applied to the tire building drum without interference.
- the conveyor table 40 includes at least one conveyor belt 60 .
- the conveyor table 40 includes at least two conveyor belts 60 , 62 , which are preferably independently operable with respect to each other. More preferably, the conveyor table includes at least three independently operable conveyor belts 60 , 62 , 64 .
- each conveyor belt 60 , 62 , 64 has a plurality of directional rollers which rotate about an axis parallel to the major axis of the table (X axis).
- the directional rollers 65 allow the ply to be conveyed laterally in the Y direction (minor axis).
- Each conveyor belt is driven by a motor 66 , only partially shown, and the conveyor belt is capable of being driven in both directions.
- the conveyor table as shown in FIGS. 3A and 3B can rotate about the Z axis an angle ⁇ in the range of about 0 to about 30 degrees.
- the conveyor table can also rotate about the X axis in the range of about ⁇ 30 degrees to about +30 degrees, as shown in FIGS. 11-12 .
- the conveyor table can rotate about the Z axis, and the X axis, or both axes at the same time for the following reasons.
- Each support leg has a foot which has a joint which can rotate in all directions, and is only constrained by the geometry of the system. In order to rotate the conveyor table about the Z axis as shown in FIG.
- the table is raised about support legs 32 , 33 and the table is lowered with respect to support legs 31 , 34 .
- the table In order to rotate the conveyor table about the X axis as shown in FIG. 11 , the table is raised with respect to support legs 31 , 32 and lowered with respect to support legs 33 , 34 .
- the conveyor table In order to tilt the table to the other side as shown in FIG. 12 , the conveyor table is raised with respect to support legs 33 , 34 and lowered with respect to support legs 31 , 32 .
- Each support leg 31 - 34 has an outer portion 31 - 34 a which slides over a respective inner portion 31 - 34 b in a telescoping fashion.
- Each inner leg portion 31 - 34 b has a first end 31 - 34 c having a flanged end for coupling to a foot, and a second end 31 - 34 d connected to an inner end 72 of a linear screw 74 so that the screw can rotate.
- the outer leg portion 31 - 34 a has a first end 31 - 34 e having a annular bearing ring 70 inserted therein to facilitate the outer first end having a smooth telescoping motion over inner leg 31 - 34 b .
- the table support frame 50 is fixedly connected to each support leg near the first end 31 - 34 e by a leg support bracket 36 , so that as the outer leg portion telescopes for and aft, the table support frame moves therewith.
- the outer leg portion 31 - 34 a further comprises a second end 31 - 34 f which is connected to a linear screw drive mechanism 80 , as shown in FIGS. 4-7 .
- the screw drive mechanism 80 engages a rotatable linear screw 74 .
- the screw drive mechanism 80 further includes a nut 82 which engages linear screw 74 .
- the screw is rotated by a gear and motor assembly (not shown) or other means known to those skilled in the art.
- a gear and motor assembly (not shown) or other means known to those skilled in the art.
- the screw is rotated in a first direction, the nut is translated upward in a first direction parallel to the Y direction.
- the screw is rotated opposite the first direction, the nut is translated downward.
- the outer leg portion also translates and telescopes, resulting in the lifting/lowering of the table.
- the operation of the screw drive mechanism results in the conveyor table being lifted.
- FIGS. 10-12 the rear view of the applier 10 is shown in a level state, and a tilted state. As shown in FIG.
- the applier is level.
- the screw of leg 34 is rotated, resulting in the nut traveling downward.
- the outer portion of the leg connected to the screw assembly telescopes in a downward direction over the inner leg portion, resulting in the table moving downward, wherein the leg is fully retracted.
- the screw of leg 31 is rotated in the opposite direction of screw 34 , so that the nut of leg 31 translates upward resulting in the outer portion of leg 31 telescoping outward in an expanding way over inner portion of leg 31 .
- the front edge 120 of the body ply table is fitted with at least one row of brush rollers, and is preferably fitted with at least two rows of brush rollers 122 , 124 .
- Each row of brush rollers comprise one or more brush rollers.
- each brush roller is mounted so that it can rotate about its longitudinal axis so that it can rotate.
- the brush rollers in the upper or first row 122 are mounted to a first end 130 of a support bar 126 .
- the brush rollers in the lower row are mounted to a second end 128 of the support bar 126 .
- the support bar is pivotally mounted to a linkage 132 having a distal end 134 which is mounted to the arm 138 of a linear actuator 136 .
- the linkage is pinned to the end of support frame at connection 140 , allowing the linkage to rotate about the pinned connection, but not allowing translation.
- the linkage 132 pivots about connection 140 , causing the one or more rows of rollers to rotate upwardly or downwardly in the +/ ⁇ Y direction.
- the brush rollers 122 , 124 are configured to support the ply or liner as the ply is being applied to the tire building drum. As shown in FIG. 3 b , the conveyor table is positioned beneath the tire building drum with the rollers tilted upwardly so that the rollers are located adjacent the tire building drum. As the ply/liner is conveyed forward, the rollers apply the liner/ply to the tire building drum.
- the tire building drum may be convex in shape when viewed from the side.
- the brush rollers are designed to provide minimum force at the drum centerline, and maximum load holding and positioning forces at the outboard edges. One way to accomplish this is to have the brush rollers at the outboard edges to be stiffer than the brush rollers near the drum centerline.
- each brush roller lifting cylinder 136 be fitted with programmable control valves to allow precise, discreet air pressure to each cylinder so that a precise, discreet force is applicable to the sheet.
- the roller force may vary from the center of the table and be higher on the outer edge of the table.
- the programmable valves allow for independent control of each set of brush rollers.
- a sheet of ply, inner liner or other sheet of tire component (hereinafter “ply”) is cut to length and then fed onto the rear portion of the conveyor belts 60 , 62 , 64 . All three conveyor belts are driven forward in the X direction, ie, in a direction towards the tire building machine until all of the component is mounted onto the conveyor table. At this stage, it is typical for the ply to have a front edge that is misaligned, ie, not square to the tire building drum.
- the table is tilted to one side by the operator as shown in FIG. 11 .
- the table can tilt to either side because it is affixed to each support leg, and each support leg can be raised and lowered independently of each other.
- Each support leg has an outer telescoping portion which slides over an inner leg portion.
- Each inner leg portion is rotatably coupled to a foot such that the leg can freely pivot or rotate in all directions.
- the inner leg portion is connected to the rotatable linear screw, while the outer leg portion is connected to a nut. As the screw rotates, the nut travels along the screw, raising or lowering the outer leg portion which is affixed to the conveyor table.
- the ply or component slides on the conveyor belt rollers towards an edge guide 144 .
- the conveyor belt rollers only rotate in one direction so that the ply can translate towards the edge guide, i.e., in the Z direction.
- the tilt angle of the table ensures that the entire edge of the ply is aligned with the entire edge of the edge guide.
- the table is then tilted back to its starting position, as shown in FIG. 1 .
- Table sensors mounted near the edge guide notify the operator of misalignment of the component. After the ply or component edge is aligned, the table is translated forward in the X direction.
- Each foot 45 has a linear bearing 47 which slides on a rail, so that the entire applier can slide fore and aft along its major axis (X axis).
- X axis major axis
- at least one of the feet 45 is connected to a chain 27 via a chain connector 29 .
- the chain 27 is driven by a gear 28 connected to a servo motor (not shown), which slides the entire applier 10 fore and aft along support rails 26 .
- the table is driven forward and lifted upward into position so that the forward nose 120 of the table is located adjacent the bottom outer surface 200 (6 pm position) of the tire building drum, as shown in FIG. 3 b .
- the brush rollers are lifted upward by the actuation of the linear actuator and are positioned adjacent the nose of the table and the tire building drum (in the 5:00 o'clock position).
- the ply or component is conveyed forward by rotation of the conveyor belts.
- the brush rollers lift up and support the ply and transfer the ply to the outer surface of the tire building drum by applying pressure to the ply against the drum as the drum rotates.
- the table is retracted, lowered and returned to the start position.
- each conveyor belt can move in the + or ⁇ direction independent of the other conveyors. If the sheet is rotated onto the conveyor table, then one or more of the belts can be driven forward or backwards to rotate the sheet in the desired direction and into the alignment position. At least one of the conveyor belts is stationary, to facilitate the rotation of the sheet on the conveyor table.
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- Tyre Moulding (AREA)
Abstract
A method for applying a sheet of flexible material to a cylindrical body is described. The sheet of material may be ply or a tire building component such as a liner. The method includes the steps of receiving the sheet of flexible material onto a conveyor belt of a conveyor table, wherein the conveyor belt can translate in the X direction, wherein the conveyor belt has a plurality of rollers rotatably mounted on the conveyor belt so they can rotate about an axis aligned with the X direction. The method further includes aligning a lateral edge of the sheet with an edge guide of the conveyor table by tilting the conveyor table and then tilting the conveyor table back to a level position. The method further includes moving a front edge of the conveyor table adjacent the cylindrical body; and applying the sheet onto the cylindrical body.
Description
- The invention relates in general to the art of tire building, and more specifically to the applying of tire sheet components such as, but not limited to, tire ply, inner liner or sidewall directly onto a cylindrical body such as a tire building drum.
- Tire ply or other rubber components are often applied to a tire building drum with a conveyor type device often referred to as an applier. Prior art appliers typically utilize a conveyor type belt to precisely apply the tire component onto the tire building drum. It is important to precisely control the application of the tire component onto the drum, and is particularly of concern for the tail end of the component. It is also important that the component be applied quickly and efficiently as possible. The applier must also retract sufficiently from the drum to provide clearance for other mechanisms and functions. Further, prior art appliers typically require a separate drive and adjustment mechanism in order to make applier adjustable to different sizes of tire building drums.
- For large tires such as 57 inch tires or larger, the ply size is very large and heavy. The ply size can range from about 8 feet by 8 feet to about 10 feet by 10 feet. The weight can vary from about 1700 lbs to 2200 pounds. Prior to application to the tire building drum, the ply is typically wound up onto a spindle of a cart for application onto an applier conveyor system. The ply is typically wound in such a manner that it is not centered with respect to the frame. The ply is delivered onto the applier server so that it is not aligned square to the server and thus will be misaligned with the tire building drum.
- Thus a tire ply server is needed that ensures that the ply delivered to the tire building drum in a properly aligned condition with respect to the drum such that the leading edge of the ply is square to the drum, and that the center of the ply is aligned with the drum centerline, and also that the ply cords are straight and square to the drum centerline.
- A method for applying a sheet of flexible material to a cylindrical body is described. The sheet of material may be ply or a tire building component such as a liner. The method includes the steps of receiving the sheet of flexible material onto a conveyor belt of a conveyor table, wherein the conveyor belt can translate in the X direction, wherein the conveyor belt has a plurality of rollers rotatably mounted on the conveyor belt so they can rotate about an axis aligned with the X direction. The method further includes aligning a lateral edge of the sheet with an edge guide of the conveyor table by tilting the conveyor table and then tilting the conveyor table back to a level position. The method further includes moving a front edge of the conveyor table adjacent the cylindrical body; and applying the sheet onto the cylindrical body.
- “Aspect Ratio” means the ratio of a tire's section height to its section width.
- “Axial” and “axially” means the lines or directions that are parallel to the axis of rotation of the tire.
- “Bead” or “Bead Core” means generally that part of the tire comprising an annular tensile member, the radially inner beads are associated with holding the tire to the rim being wrapped by ply cords and shaped, with or without other reinforcement elements such as flippers, chippers, apexes or fillers, toe guards and chafers.
- “Belt Structure” or “Reinforcing Belts” means at least two annular layers or plies of parallel cords, woven or unwoven, underlying the tread, unanchored to the bead, and having both left and right cord angles in the range from 17° to 27° with respect to the equatorial plane of the tire.
- “Bias Ply Tire” means that the reinforcing cords in the carcass ply extend diagonally across the tire from bead-to-bead at about 25-65° angle with respect to the equatorial plane of the tire, the ply cords running at opposite angles in alternate layers
- “Breakers” or “Tire Breakers” means the same as belt or belt structure or reinforcement belts.
- “Carcass” means a laminate of tire ply material and other tire components cut to length suitable for splicing, or already spliced, into a cylindrical or toroidal shape. Additional components may be added to the carcass prior to its being vulcanized to create the molded tire.
- “Circumferential” means lines or directions extending along the perimeter of the surface of the annular tread perpendicular to the axial direction; it can also refer to the direction of the sets of adjacent circular curves whose radii define the axial curvature of the tread as viewed in cross section.
- “Cord” means one of the reinforcement strands, including fibers, which are used to reinforce the plies.
- “Inner Liner” means the layer or layers of elastomer or other material that form the inside surface of a tubeless tire and that contain the inflating fluid within the tire.
- “Inserts” means the reinforcement typically used to reinforce the sidewalls of runflat-type tires; it also refers to the elastomeric insert that underlies the tread.
- “Ply” means a cord-reinforced layer of elastomer-coated, radially deployed or otherwise parallel cords.
- “Radial” and “radially” mean directions radially toward or away from the axis of rotation of the tire.
- “Radial Ply Structure” means the one or more carcass plies or which at least one ply has reinforcing cords oriented at an angle of between 65° and 90° with respect to the equatorial plane of the tire.
- “Radial Ply Tire” means a belted or circumferentially-restricted pneumatic tire in which the ply cords which extend from bead to bead are laid at cord angles between 65° and 90° with respect to the equatorial plane of the tire.
- “Sidewall” means a portion of a tire between the tread and the bead.
- “Laminate structure” means an unvulcanized structure made of one or more layers of tire or elastomer components such as the innerliner, sidewalls, and optional ply layer.
- The invention will be described by way of example and with reference to the accompanying drawings in which:
-
FIG. 1 is a side view of a ply server of the present invention shown together with a tire building machine and a ply cart; -
FIG. 2 is a top view of the system ofFIG. 1 ; -
FIG. 3A is a side view of the ply server and a tire building drum shown in a first position; -
FIG. 3B is a side view of the ply server and a tire building drum shown in an application position; -
FIG. 4 is a side view of a leg support of the ply server shown in an angled position. -
FIG. 5 is a side view of the leg support of the ply server ofFIG. 4 in the direction 5-5. -
FIG. 6 is a close up perspective view of the circled portion ofFIG. 4 ; -
FIG. 7 is an exploded view of the leg support. -
FIG. 8 is a close up view of the circled portion ofFIG. 3B ; -
FIG. 9A is a close up view in the direction 9-9 ofFIG. 8 ; -
FIGS. 9B-9D illustrate the foot and support legs in an upright position (FIG. 9B ), a tilted to the right position (FIG. 9C ) and a tilted to the left position (FIG. 9D ) -
FIG. 9E is a perspective view of the foot and support legs in the direction of 9E-9E ofFIG. 9C . -
FIG. 10 is a rear view of the ply server in the direction 10-10 ofFIG. 1 ; -
FIG. 11 is a rear view of the ply server shown tilted in a first direction; -
FIG. 12 is a front view of the ply server shown tilted in a second direction opposite the first direction; -
FIG. 13 is a side view of the support frame and support legs of the ply server. -
FIG. 14 is a top view of the support frame and support legs, as shown inFIG. 13 . -
FIGS. 1-14 illustrate a first embodiment of atire component applier 10 of the present invention. Thetire component applier 10 functions to properly align a tire component such as tire ply or tire liner with respect to a tire building machine ordrum 5, and then apply the tire component onto the tire building drum. For large tires having a diameter size of 50 inches or higher, this can be extremely difficult because the tire ply itself can weigh in the range of 1000 to 2000 pounds, and have a size on the order of 10 feet by 10 feet. If the tire component is ply having a plurality of parallel cords, thetire component applier 10 ensures the cords are straight and perpendicular to the tire building drum axis in the case of a radial tire, and that the front edge of the tire ply is square or perpendicular to the tire building drum. - As shown in
FIGS. 1-3B andFIGS. 13-14 , thetire component applier 10 comprises astationary support frame 20. Thesupport frame 20 as best shown inFIGS. 13-14 is a rectangular shaped support comprised of foursupport beams rail 26 mounted on the upper surface of the support beam for allowing the tire applier to slide fore and aft, as described in more detail, below. It is preferred that at least one of the support rails 23 have adouble rail 26, as described in more detail, below. - The
tire applier 10 further comprises foursupport legs outer telescoping portion inner leg portion collar bearing 70. As shown inFIGS. 7 and 9 , each inner leg portion has aflanged end 37 having acenter hole 38 for receiving a ball joint 39 therein. The ball joint 39 is received withincenter hole 38 and is rotatably mounted againstadjacent bearings 39 b. Thebearings 39 b are contained between a pair of flanged ends 43 mounted on afoot 45. Eachfoot 45 has alinear bearing 47 which slides on rail 26 (FIG. 9 ), so that the entire applier can slide fore and aft along its major axis (X axis). As shown inFIG. 8 , at least one of thefeet 45 is connected to achain 27 via achain connector 29. Thechain 27 is driven by agear 28 connected to a servo motor (not shown), which slides theentire applier 10 fore and aft along support rails 26. - As stated earlier, it is preferred that one of the support beams 23 have two
parallel rails 26 mounted thereon.Support beam 23 has asingle rail 26. Thesupport legs beam 23 and are shown inFIGS. 8-9 .Support legs double rails 26 mounted onbeam 22 and are slightly different in construction as shown inFIGS. 9B-9D .Support legs feet 90 that allow the support legs to translate fore and aft on twosupport rails 26 in the X direction, and further allow for translation in the Z direction (perpendicular to the rail axis). Eachsupport leg foot 90 having spaced flanged ends 92 which receive the flanged ends 37 of support legs and the ball joint 39. Each foot also has a linear bearing 94 which slides onlateral rail 98 to allow the table to translate a small amount in the Z direction (direction of table minor axis).Lateral rail 98 is mounted onplatform 100 which has twolinear bearings lateral rail 90, for sliding ondouble rails 26.FIG. 9B illustrates the support leg in a straight position, whileFIG. 9C illustrates the foot slid laterally outward in the Z direction when the table is tilted outwardly.FIG. 9D illustrates the foot which has partially slid outward in the Z direction when the table is tilted inwardly. - The conveyor table 40 is structurally supported by a
table support 50 which includes twoparallel support members first support member 52 has opposed ends which are fixedly connected to outer portion ofsupport legs support brackets 36. Asecond support member 53 has opposed ends which are fixedly connected to the outer portion of support legs 32 a and 33 a viasupport brackets 36.Cross members 54 provide increased frame rigidity and structural support. - A
first portion 42 of the conveyor table 40 is connected to thetable support 50 via fasteners (not shown). Asecond portion 44 of the conveyor table is cantilevered, and extends from thetable support 50 so that the ply can be applied to the tire building drum without interference. As shown inFIG. 2 , the conveyor table 40 includes at least oneconveyor belt 60. Preferably, the conveyor table 40 includes at least twoconveyor belts operable conveyor belts conveyor belt directional rollers 65 allow the ply to be conveyed laterally in the Y direction (minor axis). Each conveyor belt is driven by amotor 66, only partially shown, and the conveyor belt is capable of being driven in both directions. - The conveyor table as shown in
FIGS. 3A and 3B , can rotate about the Z axis an angle α in the range of about 0 to about 30 degrees. The conveyor table can also rotate about the X axis in the range of about −30 degrees to about +30 degrees, as shown inFIGS. 11-12 . The conveyor table can rotate about the Z axis, and the X axis, or both axes at the same time for the following reasons. Each support leg has a foot which has a joint which can rotate in all directions, and is only constrained by the geometry of the system. In order to rotate the conveyor table about the Z axis as shown inFIG. 3 b, the table is raised aboutsupport legs legs FIG. 11 , the table is raised with respect to supportlegs legs FIG. 12 , the conveyor table is raised with respect to supportlegs legs - The conveyor table can be raised and lowered with respect to each support leg in a manner as described in more detail, below. Each support leg 31-34 has an outer portion 31-34 a which slides over a respective inner portion 31-34 b in a telescoping fashion. Each inner leg portion 31-34 b has a first end 31-34 c having a flanged end for coupling to a foot, and a second end 31-34 d connected to an
inner end 72 of alinear screw 74 so that the screw can rotate. The outer leg portion 31-34 a has a first end 31-34 e having aannular bearing ring 70 inserted therein to facilitate the outer first end having a smooth telescoping motion over inner leg 31-34 b. Thetable support frame 50 is fixedly connected to each support leg near the first end 31-34 e by aleg support bracket 36, so that as the outer leg portion telescopes for and aft, the table support frame moves therewith. The outer leg portion 31-34 a further comprises a second end 31-34 f which is connected to a linearscrew drive mechanism 80, as shown inFIGS. 4-7 . Thescrew drive mechanism 80 engages a rotatablelinear screw 74. Thescrew drive mechanism 80 further includes anut 82 which engageslinear screw 74. The screw is rotated by a gear and motor assembly (not shown) or other means known to those skilled in the art. As the screw is rotated in a first direction, the nut is translated upward in a first direction parallel to the Y direction. As the screw is rotated opposite the first direction, the nut is translated downward. As the nut is translated in either direction, the outer leg portion also translates and telescopes, resulting in the lifting/lowering of the table. Thus the operation of the screw drive mechanism results in the conveyor table being lifted. As best shown inFIGS. 10-12 , the rear view of theapplier 10 is shown in a level state, and a tilted state. As shown inFIG. 10 , the applier is level. In order to tilt the table to the left as shown inFIG. 11 , the screw ofleg 34 is rotated, resulting in the nut traveling downward. As the nut travels downward in a direction parallel to the Y axis, the outer portion of the leg connected to the screw assembly telescopes in a downward direction over the inner leg portion, resulting in the table moving downward, wherein the leg is fully retracted. In order to lift the table, the screw ofleg 31 is rotated in the opposite direction ofscrew 34, so that the nut ofleg 31 translates upward resulting in the outer portion ofleg 31 telescoping outward in an expanding way over inner portion ofleg 31. - The
front edge 120 of the body ply table is fitted with at least one row of brush rollers, and is preferably fitted with at least two rows ofbrush rollers first row 122 are mounted to afirst end 130 of asupport bar 126. The brush rollers in the lower row are mounted to asecond end 128 of thesupport bar 126. The support bar is pivotally mounted to alinkage 132 having a distal end 134 which is mounted to the arm 138 of alinear actuator 136. The linkage is pinned to the end of support frame at connection 140, allowing the linkage to rotate about the pinned connection, but not allowing translation. When the arm of thelinear actuator 136 opens and closes, thelinkage 132 pivots about connection 140, causing the one or more rows of rollers to rotate upwardly or downwardly in the +/−Y direction. - The
brush rollers FIG. 3 b, the conveyor table is positioned beneath the tire building drum with the rollers tilted upwardly so that the rollers are located adjacent the tire building drum. As the ply/liner is conveyed forward, the rollers apply the liner/ply to the tire building drum. The tire building drum may be convex in shape when viewed from the side. The brush rollers are designed to provide minimum force at the drum centerline, and maximum load holding and positioning forces at the outboard edges. One way to accomplish this is to have the brush rollers at the outboard edges to be stiffer than the brush rollers near the drum centerline. In addition, it is preferred that the brush rollers be grouped in multiple sets, each set having apair actuating mechanism roller lifting cylinder 136 be fitted with programmable control valves to allow precise, discreet air pressure to each cylinder so that a precise, discreet force is applicable to the sheet. Thus the roller force may vary from the center of the table and be higher on the outer edge of the table. The programmable valves allow for independent control of each set of brush rollers. - The operation of the system can now be described. A sheet of ply, inner liner or other sheet of tire component (hereinafter “ply”) is cut to length and then fed onto the rear portion of the
conveyor belts - In order to align the ply or tire component, the table is tilted to one side by the operator as shown in
FIG. 11 . The table can tilt to either side because it is affixed to each support leg, and each support leg can be raised and lowered independently of each other. Each support leg has an outer telescoping portion which slides over an inner leg portion. Each inner leg portion is rotatably coupled to a foot such that the leg can freely pivot or rotate in all directions. The inner leg portion is connected to the rotatable linear screw, while the outer leg portion is connected to a nut. As the screw rotates, the nut travels along the screw, raising or lowering the outer leg portion which is affixed to the conveyor table. - As the table is tilted to one side by the operator as shown in
FIG. 11 , the ply or component slides on the conveyor belt rollers towards anedge guide 144. The conveyor belt rollers only rotate in one direction so that the ply can translate towards the edge guide, i.e., in the Z direction. The tilt angle of the table ensures that the entire edge of the ply is aligned with the entire edge of the edge guide. After the edge alignment has occurred, the table is then tilted back to its starting position, as shown inFIG. 1 . Table sensors mounted near the edge guide notify the operator of misalignment of the component. After the ply or component edge is aligned, the table is translated forward in the X direction. Eachfoot 45 has alinear bearing 47 which slides on a rail, so that the entire applier can slide fore and aft along its major axis (X axis). As shown inFIG. 8 , at least one of thefeet 45 is connected to achain 27 via achain connector 29. Thechain 27 is driven by agear 28 connected to a servo motor (not shown), which slides theentire applier 10 fore and aft along support rails 26. - The table is driven forward and lifted upward into position so that the
forward nose 120 of the table is located adjacent the bottom outer surface 200 (6 pm position) of the tire building drum, as shown inFIG. 3 b. The brush rollers are lifted upward by the actuation of the linear actuator and are positioned adjacent the nose of the table and the tire building drum (in the 5:00 o'clock position). After the table and rollers are in position, the ply or component is conveyed forward by rotation of the conveyor belts. The brush rollers lift up and support the ply and transfer the ply to the outer surface of the tire building drum by applying pressure to the ply against the drum as the drum rotates. After the ply or component is applied to the drum, the table is retracted, lowered and returned to the start position. - The ply or sheet misalignment may also be corrected by the use of the
independent conveyors - Variations in the present invention are possible in light of the description of it provided herein. While certain representative embodiments and details have been shown for the purpose of illustrating the subject invention, it will be apparent to those skilled in this art that various changes and modifications can be made therein without departing from the scope of the subject invention. It is, therefore, to be understood that changes can be made in the particular embodiments described which will be within the full intended scope of the invention as defined by the following appended claims.
Claims (2)
1-18. (canceled)
19. A method for aligning the ply onto a conveyor belt, the method comprising the steps of:
a. receiving the sheet of flexible material onto a conveyor table having at least two adjacent conveyor belts, wherein the conveyor belts can translate fore and aft in the X direction independently of each other,
b. moving one conveyor belt relative to the other conveyor belt in the X direction until a lateral edge of the sheet is aligned with an edge guide of the conveyor table;
c. moving a front edge of the conveyor table adjacent the cylindrical body;
d. and applying the sheet onto the cylindrical body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/809,795 US20150328852A1 (en) | 2011-12-22 | 2015-07-27 | Method of applying ply to a tire building drum |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161579194P | 2011-12-22 | 2011-12-22 | |
US13/562,605 US9114581B2 (en) | 2011-12-22 | 2012-07-31 | Method of applying ply to a tire building drum |
US14/809,795 US20150328852A1 (en) | 2011-12-22 | 2015-07-27 | Method of applying ply to a tire building drum |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/562,605 Division US9114581B2 (en) | 2011-12-22 | 2012-07-31 | Method of applying ply to a tire building drum |
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US20150328852A1 true US20150328852A1 (en) | 2015-11-19 |
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ID=48631568
Family Applications (2)
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US13/562,605 Active US9114581B2 (en) | 2011-12-22 | 2012-07-31 | Method of applying ply to a tire building drum |
US14/809,795 Abandoned US20150328852A1 (en) | 2011-12-22 | 2015-07-27 | Method of applying ply to a tire building drum |
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US13/562,605 Active US9114581B2 (en) | 2011-12-22 | 2012-07-31 | Method of applying ply to a tire building drum |
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US (2) | US9114581B2 (en) |
JP (1) | JP6215529B2 (en) |
CN (1) | CN103171166B (en) |
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WO2016103078A1 (en) | 2014-12-24 | 2016-06-30 | Pirelli Tyre S.P.A. | Tyre building plant and method for supplying an elongated element to a forming drum in a tyre building plant |
CN109263106A (en) * | 2018-10-09 | 2019-01-25 | 北京北人增材制造技术有限公司 | All-steel radial tyre tyre surface sub-assembly applying system |
JP7403304B2 (en) * | 2019-12-13 | 2023-12-22 | Toyo Tire株式会社 | Green tire molding equipment and molding method |
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Also Published As
Publication number | Publication date |
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US20130160930A1 (en) | 2013-06-27 |
JP2013132906A (en) | 2013-07-08 |
CN103171166A (en) | 2013-06-26 |
JP6215529B2 (en) | 2017-10-18 |
CN103171166B (en) | 2016-12-28 |
US9114581B2 (en) | 2015-08-25 |
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Legal Events
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AS | Assignment |
Owner name: GOODYEAR TIRE & RUBBER COMPANY, THE, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STOILA, GEORGE MICHAEL;WELLS, DALE EUGENE;SELLS, THOMAS ALAN;AND OTHERS;SIGNING DATES FROM 20150820 TO 20150827;REEL/FRAME:036909/0455 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |