System and method for making non-pneumatic tire

Abstract

A system for a non-pneumatic tire structure includes a cured cladding sized and configured to receive an upper ring and a circumferential tread of the non-pneumatic tire structure. The system also includes a tensioning system having a first sealing ring, a second sealing ring, and a tensioner. The tensioner connects the first sealing ring and the second sealing ring to each other. Each tensioner includes a first head and a second head configured for attachment to the first seal ring and the second seal ring, respectively. A connector member connects the first head and the second head to each other. The tensioner further comprises an adjusting mechanism. The adjusting mechanism allows the distance between the first head and the second head to be adjusted. The adjustment is used such that the tensioning system presses the cured cladding against the non-pneumatic tire structure to form a substantially airtight seal between the cured cladding and the non-pneumatic tire structure.

Description

Technical Field

[0001] The present disclosure relates to systems and methods for making non-pneumatic tires. More particularly, the present disclosure relates to a system and method for applying a tread to a non-pneumatic tire structure. Background Art

[0002] Various tire constructions have been developed that allow the tire to be driven in an uninflated or underinflated state. Non-pneumatic tires do not require inflation, while "run-flat tires" can continue to be driven at relatively high speeds for extended periods after being punctured and losing all or part of their pressurized air. Non-pneumatic tires may include a plurality of spokes, a web, or other support structure connecting a lower ring to an upper ring. It is known to adhere a pre-cured tread to the upper ring of a non-pneumatic tire using an adhesive or cement. Summary of the Invention

[0003] In one embodiment, a system for a non-pneumatic tire structure includes a curing envelope sized and configured to receive the upper ring and circumferential tread of the non-pneumatic tire structure. The system also includes a tensioning system having a first sealing ring, a second sealing ring, and a plurality of tensioners. The plurality of tensioners connect the first sealing ring and the second sealing ring to each other. Each of the plurality of tensioners includes a first head and a second head, the first head being configured to attach to the first sealing ring and the second head being configured to attach to the second sealing ring. A connector member connects the first head and the second head to each other. Each of the plurality of tensioners also includes an adjustment mechanism. The adjustment mechanism is configured to allow adjustment of the distance between the first head and the second head. Using the adjustment, the tensioning system presses the curing envelope against the non-pneumatic tire structure to form a substantially airtight seal between the curing envelope and the non-pneumatic tire structure.

[0004] In another embodiment, a method for making a non-pneumatic tire includes providing a tire structure. The tire structure includes a lower ring having a first diameter, an upper ring having a second diameter greater than the first diameter, and a support structure extending between the lower ring and the upper ring, the lower ring having a first diameter, the upper ring having a second diameter greater than the first diameter, the upper ring being substantially coaxial with the lower ring. The method also includes providing an elastomeric tread circumferentially around the top of the upper ring. The tire structure and the elastomeric tread are received in a curing envelope. A tensioning system is arranged around the curing envelope. The tensioning system includes a first sealing ring, a second sealing ring, and a plurality of tensioners connecting the first sealing ring and the second sealing ring to each other. Each of the plurality of tensioners includes an adjustment mechanism. The method also includes adjusting each of the adjustment mechanisms so that the first sealing ring and the second sealing ring press the curing envelope against the tire structure to form a substantially airtight seal between the curing envelope and the tire structure, thereby forming a substantially airtight environment defined by the curing envelope and the tire structure. Heat is introduced into the substantially airtight environment.

[0005] In yet another embodiment, a system for assembling a non-pneumatic tire structure includes a curing envelope sized and configured to receive an upper ring and a circumferential tread of the non-pneumatic tire structure. The system also includes a tensioning system having a first sealing ring, a second sealing ring, and a plurality of tensioners. The plurality of tensioners connect the first sealing ring and the second sealing ring to each other. Each of the plurality of tensioners includes: a first anchor including a first adjustment mechanism for attaching a first head to a first body; a second anchor including a second adjustment mechanism for attaching a second head to a second body; and a connector member connecting the first anchor and the second anchor to each other. The first adjustment mechanism and the second adjustment mechanism are each configured to allow adjustment of a distance between the first head and the second head. Reducing the distance between the first head and the second head using the first adjustment mechanism and the second adjustment mechanism causes the tensioning system to press the curing envelope against the non-pneumatic tire structure to form a substantially airtight seal between the curing envelope and the non-pneumatic tire structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In the accompanying drawings, structures are illustrated which, together with the detailed description provided below, describe exemplary embodiments of the invention as protected by the claims. Similar elements are designated by the same reference numerals. It should be understood that elements shown as a single component may be replaced with multiple components, and elements shown as multiple components may be replaced with a single component. The drawings are not drawn to scale, and the proportions of certain elements may be exaggerated for illustrative purposes.

[0007] Figure 1 is a perspective view of one embodiment of a non-pneumatic tire,

[0008] Figure 2 yes Figure 1 An enlarged partial perspective view of a non-pneumatic tire,

[0009] Figure 3 is a schematic diagram illustrating a cross section of one embodiment of a non-pneumatic tire,

[0010] Figure 4 is a schematic diagram illustrating a cross section of an alternative embodiment of a non-pneumatic tire,

[0011] Figure 5 is a schematic diagram illustrating a cross section of another alternative embodiment of a non-pneumatic tire,

[0012] Figure 6 is a schematic diagram illustrating a perspective view of one embodiment of a curing envelope for a non-pneumatic tire,

[0013] Figure 7 is a perspective view of one embodiment of a sealing system for manufacturing a non-pneumatic tire,

[0014] Figure 8 It is along Figure 7 A cross-sectional view of a portion of

[0015] Figure 9 It can be used with Figure 7 A side view of an embodiment of a tensioner for use with a sealing system,

[0016] Figure 10 is a flow chart illustrating an exemplary method of manufacturing a non-pneumatic tire, and

[0017] Figure 11 It can be used with Figure 7 A side view of an alternative embodiment of a tensioner for use with a sealing system. DETAILED DESCRIPTION

[0018] The following includes definitions of selected terms used herein. These definitions include various examples and / or forms of components that fall within the scope of the term and can be used for implementation. The examples are not intended to be limiting. Both singular and plural forms of the terms may be included within the definitions.

[0019] "Axial" and "axially" refer to directions parallel to the tire's axis of rotation.

[0020] “Circumferential” and “circumferentially” refer to directions perpendicular to the axial direction extending along the circumference of the surface of the tread.

[0021] "Radial" and "radially" refer to directions perpendicular to the tire's axis of rotation.

[0022] As used herein, "tread" means that portion of the tire that comes into contact with the road or ground under normally inflated and normally loaded conditions.

[0023] Although similar terms are used in the following description to describe common tire components, it should be understood that because these terms carry slightly different meanings, one of ordinary skill in the art would not consider any of the following terms to be completely interchangeable with another term used to describe common tire components.

[0024] Directions are described herein with reference to the tire's axis of rotation. The terms "upward" and "upwardly" refer to a general direction toward the tire's tread, while "downward" and "downwardly" refer to a general direction toward the tire's axis of rotation. Thus, when relative directional terms such as "upper" and "lower" or "top" and "bottom" are used in conjunction with an element, the "upper" or "top" element is spatially closer to the tread than the "lower" or "bottom" element. Furthermore, when relative directional terms such as "above" or "below" are used in conjunction with an element, if an element is "above" another element, it means that the element is closer to the tread than the other element.

[0025] The terms "inwardly" and "inwardly" refer to general directions toward the equatorial plane of the tire, while "outwardly" and "outwardly" refer to general directions away from the equatorial plane of the tire and toward the sidewalls of the tire. Thus, when relative directional terms such as "inner" and "outer" are used in connection with an element, the "inner" element is spatially closer to the equatorial plane of the tire than the "outer" element.

[0026] Figure 1 FIG1 is a perspective view of one embodiment of a non-pneumatic tire 100. Non-pneumatic tire 100 includes a lower ring 110 having a first diameter and an upper ring 120 having a second diameter greater than the first diameter. Upper ring 120 is substantially coaxial with lower ring 110. A plurality of spokes 130 extend between lower ring 110 and upper ring 120. In an alternative embodiment, a web or other support structure may be used in place of the spokes. It should be understood that the term "support structure" may refer to either the web or the spokes.

[0027] In one embodiment, each of the lower ring 110, the upper ring 120, and the spokes 130 are constructed of the same material. In a specific embodiment, each of the lower ring 110, the upper ring 120, and the spokes 130 are constructed of steel. In alternative embodiments, each of the lower ring 110, the upper ring 120, and the spokes 130 are constructed of other metals, carbon fibers, resins, or polymer materials such as polyurethane, polyester, nylon, or polyvinyl chloride (PVC). However, it should be understood that other materials may be used and that the rings and spokes are not limited to the listed materials.

[0028] In alternative embodiments, one or more of the lower ring 110, upper ring 120, and spokes 130 are constructed of different materials. For example, the upper ring 120 may be a steel belt, while the lower ring 120 and spokes 130 are constructed of other metals, carbon fibers, resins, or polymer materials such as polyurethane, polyester, nylon, or polyvinyl chloride (PVC).

[0029] In the illustrated embodiment, the lower ring 110 is shown attached to a hub 140. It should be understood that the illustrated hub is merely exemplary and that the lower ring 110 may be attached to any hub or wheel structure.

[0030] In the illustrated embodiment, a circumferential tread 150 is disposed about the upper ring 120. The circumferential tread 150 may be constructed of an elastomeric material, such as natural or synthetic rubber. The tread 150 is shown as having a plurality of circumferential grooves defining a plurality of ribs. It should be understood that the tread may also include tread elements such as transverse grooves, ribs, blocks, lugs, sipes, studs, and other elements. A shear band or other shear element or reinforcement structure (not shown) may be disposed between the upper ring 120 and the tread 140. Alternatively, the shear band or other shear element may be disposed within the tread.

[0031] In one embodiment, circumferential tread 150 is attached to the top of upper ring 120 without a pressure sensitive adhesive disposed between upper ring 120 and circumferential tread 150. In one such embodiment, circumferential tread 150 is bonded directly to the top of upper ring 120. In another such embodiment, a cured rubber strip (not shown) or a temperature sensitive adhesive is disposed between circumferential tread 150 and upper ring 120.

[0032] Figure 2 yes Figure 1 FIG2 is an enlarged perspective view of a non-pneumatic tire. As can be seen in this view, spokes 130 are multiple curved or arcuate spokes that intersect with each other. However, it should be understood that the illustrated spokes are merely exemplary. In other embodiments, the spokes may be straight or multi-segmented. Additionally, non-intersecting spokes may be employed.

[0033] As can be seen in this view, in this embodiment, the upper ring 120 has a greater width than the spokes 130, such that the upper ring 120 extends outward from the spokes 130, thereby defining a raised portion 170. The raised portion 170 may also be referred to as a top plate. In one embodiment, the raised portion 170 has a width between 0.375 inches (0.95 cm) and 1 inch (2.54 cm). In alternative embodiments, the raised portion may have a width between 0.25 inches (0.64 cm) and 1.5 inches (3.8 cm).

[0034] From this view, the protrusions 170 are shown on only one side of the tire. However, it should be understood that the spokes 130 are attached to the upper ring 120 such that a first side of the upper ring 120 extends outward from the first side of the spokes 130, thereby defining a first protrusion 170, and a second side of the upper ring 120 extends outward from the second side of the spokes 130, thereby defining a second protrusion (not shown). In one embodiment, the first protrusion has a width equal to the width of the second protrusion. In an alternative embodiment, the first protrusion is wider than the second protrusion. In another alternative embodiment, the protrusion is omitted from one or both sides.

[0035] The relative dimensions of the non-pneumatic tire structure may vary. For example, Figures 3 to 5 are schematic diagrams illustrating cross sections of three different embodiments of non-pneumatic tires. Figure 3 In FIG, non-pneumatic tire 200 includes a lower ring 210, an upper ring 220, and a support structure 230 extending between lower ring 210 and upper ring 220. A circumferential tread 250 is provided on the top surface of upper ring 220. Support structure 230 may be a spoke, a web, or other support structure. Although support structure 230 is shown as continuous in the axial direction, in other embodiments, the support structure is discontinuous in the axial direction.

[0036] In this embodiment, lower ring 210, upper ring 220, and circumferential tread 250 each have a substantially identical first axial width W1. Support structure 230 has a second axial width W2 that is less than first axial width W1. Thus, upper ring 220 extends outwardly from support structure 230 on both sides of non-pneumatic tire 200, thereby defining a first protrusion 270a on a first side of tire 200 and a second protrusion 270b on a second side of tire 200.

[0037] Additionally, in this embodiment, lower ring 210 also extends outwardly from support structure 230 and forms a ridge on each side of tire 200. In alternative embodiments (not shown), the tread may be wider or narrower than the upper ring.

[0038] exist Figure 4 In FIG, non-pneumatic tire 300 includes a lower ring 310, an upper ring 320, and a support structure 330 extending between lower ring 310 and upper ring 320. A circumferential tread 350 is provided on the top surface of upper ring 320. Support structure 330 may be a spoke, a web, or other support structure. Although support structure 330 is shown as continuous in the axial direction, in other embodiments, the support structure is discontinuous in the axial direction.

[0039] In this embodiment, the upper ring 320 and the circumferential tread 350 each have a substantially identical first axial width W1. The lower ring 310 and the support structure 230 each have a substantially identical second axial width W2, which is less than the first axial width W1. Thus, the upper ring 320 extends outward from the support structure 330 on both sides of the non-pneumatic tire 300, thereby defining a first protrusion 370a on a first side of the tire 300 and a second protrusion 370b on a second side of the tire 300. In this embodiment, the lower ring 310 is flush with the support structure 330. In alternative embodiments (not shown), the tread may be wider or narrower than the upper ring.

[0040] exist Figure 5 In FIG, non-pneumatic tire 400 includes a lower ring 410, an upper ring 420, and a support structure 430 extending between lower ring 410 and upper ring 420. A circumferential tread 450 is provided on the top surface of upper ring 420. Support structure 430 may be a spoke, a web, or other support structure. Although support structure 430 is shown as continuous in the axial direction, in other embodiments, the support structure is discontinuous in the axial direction.

[0041] In this embodiment, the upper ring 420, the circumferential tread 450, the lower ring 410, and the support structure 430 all have substantially the same axial width W. Thus, in this embodiment, the upper ring 420, the support structure 430, and the lower ring 410 are substantially flush with one another and have no protrusions on either side. In alternative embodiments (not shown), the tread may be wider or narrower than the upper ring.

[0042] It should be understood that Figures 3 to 5 This is exemplary only, and the relative widths of each component of a non-pneumatic tire may vary.

[0043] As previously mentioned, the process of manufacturing a non-pneumatic tire may include adhering a pre-cured tread to an upper hoop of the non-pneumatic tire. Figures 6 to 9 A sealing system 500 is shown that can be used during the adhesion process. The sealing system 500 includes a curing bag 505 and a tensioning system 600. The tensioning system 600 is configured to press the curing bag 505 against a portion of the non-pneumatic tire to form a substantially airtight seal between the curing bag and the portion of the non-pneumatic tire. The seal causes a portion of the non-pneumatic tire (including the pre-cured tread and the upper ring) to be enclosed in a substantially airtight environment defined by the curing bag 505 and the portion of the non-pneumatic tire against which the curing bag 505 is pressed. Heat and pressure can be introduced into the airtight environment to cause the pre-cured tread to adhere to the upper ring. According to one embodiment, a seal is formed between the curing bag 505 and the upper ring of the non-pneumatic tire.

[0044] refer to Figure 6, the curing envelope 505 is sized and configured to receive the upper annulus and circumferential tread of a non-pneumatic tire structure. The curing envelope 505 has a pair of sides 510 that terminate in a first end 520 and a second end 530. Although the sides 510 are shown as flat, it should be understood that they can be curved or undulating as desired. The first end 520 and the second end 530 each define an inner diameter ID of the curing envelope 505. The curing envelope 505 also has a top 540 that defines an outer diameter OD. Although the top 540 is shown as flat, it should be understood that it can be curved or undulating as desired.

[0045] The size and configuration of the curing envelope 505 are set to use with the non-pneumatic tire of a specific size. However, it should be understood that the size and configuration of the curing envelope 505 can be set to adapt to a certain range of tire sizes, rather than only adapting to a specific tire size. According to an example, the inner diameter ID can be between 22 inches (56cm) and 58 inches (147cm). According to this example, the outer diameter OD can be between 28 inches (71cm) and 60 inches (152cm). In one embodiment, the side 510 of the curing envelope 505 has a length between 2 inches to 6 inches (5cm to 15cm). In other words, the outer diameter OD is 2 inches to 6 inches larger than the inner diameter ID.

[0046] Curing envelope 505 can be the sheet of butyl rubber, other rubber compounds, chloroprene rubber, polyethylene, latex or other flexible materials.The material sheet can have the thickness between 0.008 inch (0.02cm) and 0.12 inch (0.3cm).The sheet may be damaged or torn by any sharp edge on the spokes or supporting structure of the non-pneumatic tire.Therefore, it is advantageous that the first end 510 and the second end 520 engage with the surface of the upper ring of the non-pneumatic tire rather than extend to the spokes or supporting structure.Therefore, the size and configuration of the side 510 of curing envelope 505 are set to not extend to the spokes or supporting structure.In other words, inner diameter ID and outer diameter OD are preferably selected so that side 510 does not extend to the spokes or supporting structure.

[0047] refer to Figures 7 to 9 , the tensioning system 600 includes a first sealing ring 605, a second sealing ring 610, and a plurality of tensioners 615. The tensioners 615 connect the first sealing ring 605 and the second sealing ring 610 to each other. In the illustrated embodiment, each of the first sealing ring 605 and the second sealing ring 610 is substantially annular and extends between a first edge 620 and a second edge 625. The first edge 620 defines an inner diameter ID of the sealing rings 605, 610. sr The second edge 625 defines the outer diameter OD of the sealing rings 605 and 610. srIn alternative embodiments, the sealing ring may be of any desired shape.

[0048] The first sealing ring 605 and the second sealing ring 610 are preferably constructed of a material that is lightweight and rigid but does not flex or bend under heat. In one embodiment, the first sealing ring 605 and the second sealing ring 610 are constructed of aluminum.

[0049] Each of the first and second sealing rings 605, 610 includes a plurality of slots 630. The slots 630 extend radially inward from the second edge 625 toward the first edge 620. In the illustrated embodiment, each slot 630 is substantially linear and has semicircular ends. Additionally, in the illustrated embodiment, each of the first and second sealing rings 605, 610 includes eight slots 630. In alternative embodiments, the sealing rings may include a greater or lesser number of slots. In other alternative embodiments, the sealing rings may include non-linear slots or slots having end shapes other than semicircular.

[0050] The first sealing ring 605 and the second sealing ring 610 are sized and configured to be used with a non-pneumatic tire of a particular size. However, it should be understood that the first sealing ring 605 and the second sealing ring 610 can be sized and configured to accommodate a range of non-pneumatic tire sizes, rather than just one particular tire size. According to one example, the inner diameter ID sr Smaller than the inner diameter of the upper ring of a non-pneumatic tire, and the outer diameter OD sr is larger than the outer diameter of the upper ring of a non-pneumatic tire. According to this example, the inner diameter ID sr Available in sizes from 0 inches to 20 inches (0 cm to 51 cm) with an outside diameter OD sr It can be between 24 inches and 50 inches (61 cm to 127 cm). In addition, according to this example, the length L of each slot 630 in the sealing ring 605, 610 is s Between 2 inches and 8 inches (5 cm to 20 cm).

[0051] Each of the plurality of tensioners 615 includes a first anchor 640, a second anchor 645, and a connector member 650 connecting the first anchor 640 and the second anchor 645 to each other. In the illustrated embodiment, the connector member 650 is a flexible member in the form of a chain. In alternative embodiments, the connector member can be any desired flexible member (such as, for example, a cable or rope). In other alternative embodiments, the connector member can be a rigid member (such as a rod).

[0052] The first anchor 640 and the second anchor 645 each include a body 655 and a head 660. The body 655 extends between a first end 665 and a second end 670. The head 660 also extends between a first end 675 and a second end 680. An adjustment mechanism 685 attaches the first end 665 of the body 655 to the first end 675 of the head 660. A retainer 690 is disposed at the second end 670 of the body 655. The retainer 690 attaches the body 655 to the connector member 650. In the illustrated embodiment, the retainer 690 is a ring. In alternative embodiments, the retainer can be any desired arrangement. In other alternative embodiments, the retainer can be omitted, and the connector member can be directly attached to the body.

[0053] A fastening portion 695 is disposed toward the second end 680 of the head 660. The fastening portion 695 is configured to attach the head 660 to one of the sealing rings, thereby attaching the first anchor 640 and the second anchor 645 to the first sealing ring 605 and the second sealing ring 610, respectively. In the illustrated embodiment, the fastening portion 695 is a reduced diameter portion formed in the head 660. The reduced diameter portions and the slot 630 of the first and second sealing rings 605, 610 are sized and configured to allow the slot to receive the reduced diameter portion to provide the desired attachment of the first anchor 640 and the second anchor 645 to the first sealing ring 605 and the second sealing ring 610, respectively.

[0054] In an alternative embodiment (not shown), the fastening portion can be two diametrically opposed notched portions extending only partially around the circumference of the head. In another alternative embodiment (not shown), the fastening portion can be a flanged end of the head. In yet another alternative embodiment (not shown), the fastening portion can be one or more pins extending radially from the head. Such pins can be removable, or they can be permanent structures.

[0055] The adjustment mechanism 685 allows adjustment of the distance D between the head 660 of the first anchor 640 and the head 660 of the second anchor 645. t According to an example embodiment, the distance D t Adjustable within a range of 0.5 inches to 4 inches (1 cm to 10 cm). In alternative embodiments, the tensioner may allow adjustability within a range of any desired distance. In other alternative embodiments, only one of the first anchor or the second anchor may include an adjustment mechanism.

[0056] When the tensioning system 600 (including the sealing rings 605, 610 and the tensioner 615) is placed around the curing envelope 505 (which is in turn placed around both the upper annulus and the circumferential tread of the non-pneumatic tire), the adjustment mechanism 685 can be used to reduce the distance Dt , thereby effectively moving the first and second sealing rings 605, 610 toward each other to press the cured envelope 505 into engagement with the upper ring of the non-pneumatic tire and form the aforementioned substantially airtight seal.

[0057] In the illustrated embodiment, the adjustment mechanism 685 includes a threaded rod 700 extending from the body 655 and received by a threaded channel 705 on the head 660. In alternative embodiments, the adjustment mechanism may include a threaded rod 700 that allows adjustment of the distance D t For example, the positions of the threaded channel and the threaded rod can be reversed so that the head comprises the threaded rod and the body comprises the threaded channel.

[0058] Figure 10 Shows the use Figures 6 to 9 An exemplary method 800 for manufacturing a non-pneumatic tire using a sealing system 500 is provided. At 805, a tire structure is provided. The tire structure has a lower ring, an upper ring, and a support structure, such as described above with respect to Figures 1 to 5 Any of the tire structures described.

[0059] At 810, an elastomeric tread is provided circumferentially around the top of the upper ring. The elastomeric tread can be a pre-cured or partially cured tread, with any desired tread elements pre-formed before providing the tread around the upper ring. In one embodiment, a raw rubber (i.e., cushion rubber) strip or temperature-sensitive adhesive is first applied to the elastomeric tread or upper ring. In an alternative embodiment, the elastomeric tread is placed directly onto the upper ring.

[0060] At 815, a curing envelope is placed around the elastomeric tread. The curing envelope may have the Figure 6 The structure of the description.

[0061] At 820, a tensioning system is arranged around the cured blanket. The tensioning system may have the characteristics described above with respect to Figures 7 to 9 The structure described above may include a first sealing ring, a second sealing ring, and a plurality of tensioners, each of the plurality of tensioners having an adjustment mechanism. At 825, a tensioning system may be used to form a substantially airtight seal between the curing bag and the tire structure. The seal may be formed by using the adjustment mechanism of the tensioning member to move the first ring and the second ring toward each other to press the curing bag into engagement with a portion of the tire structure.

[0062] Optionally, a core material can be placed between the tread and the curing envelope. An example of a core material is a loosely woven nylon fabric. The core material can be wrapped around the entire tread, or it can be placed where the tensioner is located. The core material prevents the tensioning system from sealing the curing envelope to the tread, thereby forming an isolated pocket. Thus, the core material helps to evacuate air from the curing envelope.

[0063] At 830, after the seal is formed, heat and pressure are introduced into the curing envelope. In one embodiment, heat is introduced at a temperature between 200°F and 300°F (90°C to 150°C) and pressure is applied at 40 psi to 100 psi (276 kPa to 689 kPa). Since the elastomeric tread is pre-cured, the tread is only heated to a temperature sufficient to bond the tread to the upper ring.

[0064] In the case where the elastomeric tread is partially cured rubber, the curing system can cure the elastomeric tread so that it bonds to the upper ring. Alternatively, a layer of raw cushioning material (not shown) or a temperature-sensitive adhesive is placed between the tread and the upper ring. During curing, the cushioning material or temperature-sensitive adhesive bonds the elastomeric tread to the upper ring. In either case, if the cushioning material or temperature-sensitive adhesive is placed between the upper ring and the tread, the cushioning material or temperature-sensitive adhesive will bond to both the upper ring and the tread during the curing process.

[0065] While the method of making a tire has been described with reference to a particular curing envelope and tensioning system to provide a desired seal, it should be understood that these examples are not intended to be limiting. The method may be performed using any other mechanism or mechanisms to provide a desired seal.

[0066] Figure 11 An alternative embodiment of a tensioner 915 is shown. This tensioner embodiment may be used in conjunction with the tensioner 915 described above. Figures 6 to 9 The tensioner 915 includes a body 920 , a first head 925 , and a second head 930 .

[0067] The first connector member 935 connects the first head 925 to the first end 940 of the body 920. The second connector member 945 connects the second head 930 to the second end 950 of the body 920. In the illustrated embodiment, the first connector member 935 and the second connector member 945 are each flexible members in the form of cables. In alternative embodiments, the connector members can be any desired flexible member (such as, for example, a chain or rope). In other alternative embodiments, the connector members can be rigid members (such as a rod).

[0068] The first head 925 and the second head 930 each extend between a first end 955 and a second end 960. The first end 955 of the head 925 is connected to a respective one of the first connector member 935 and the second connector member 945. A fastening portion 965 is provided toward the second end 960 of the heads 925, 930. In the illustrated embodiment, the fastening portion 965 is a reduced diameter portion formed in the heads 925, 930. In alternative embodiments, other fastening portions, such as those described above with respect to the head 660 of the tensioner 615, may be employed.

[0069] The fastening portions 965 of the heads 925, 930 and the slots on the sealing rings to be used with the tensioner are sized and configured to allow the slots to receive the reduced diameter portions to attach the first and second heads to the first and second sealing rings, respectively.

[0070] The body 920 includes a first portion 970 and a second portion 975. The adjustment mechanism 980 connects the first portion 970 and the second portion 975 to each other. The adjustment mechanism allows adjustment of the distance D between the fastening portion 965 of the first head 925 and the fastening portion 965 of the second head 930. t According to an example embodiment, the distance D t Adjustable within a range of 0.5 inches to 4 inches (1 cm to 10 cm). In alternative embodiments, the tensioner may allow adjustability within a range of any desired distance.

[0071] According to one exemplary embodiment, the adjustment mechanism 980 includes a threaded channel 985 on the first portion 970 of the body 920 that receives a threaded rod 990 extending from the second portion 975 of the body 920. In alternative embodiments, the adjustment mechanism may include a t For example, the positions of the threaded channel and the threaded rod may be reversed so that the first portion of the body comprises the threaded rod and the second portion of the body comprises the threaded channel.

[0072] To the extent that the terms "including" or "having" are used in the specification or claims, they are intended to be inclusive in a manner similar to the way the term "comprising" is understood when used as a transition word in the claims. Furthermore, to the extent that the term "or" is used (e.g., A or B), the term is intended to mean "A or B or both." When the applicant intends to indicate "only A or B but not both," the term "only A or B but not both" will be used. Thus, the use of the term "or" herein is inclusive and not exclusive. See Bryan Garner, A Dictionary of Modern Legal Usage 624 (2d. Ed. 1995). Furthermore, to the extent that the terms "in" or "into" are used in the specification and claims, the terms are intended to mean "on" or "onto." Furthermore, to the extent the term “connected” is used in the specification or claims, the term is intended to mean not only “directly connected to,” but also “indirectly connected to,” such as connected through another component or components.

[0073] Although the present application has been illustrated by descriptions of its embodiments, and although the embodiments have been described in considerable detail, it is not the intention of the applicant to restrict or in any way limit the scope of the appended claims to such details. Additional advantages and modifications will be apparent to those skilled in the art. Therefore, the present application, in its broader aspects, is not limited to the specific details, representative apparatus and methods, and illustrative examples shown and described. Therefore, departures may be made from such details without departing from the spirit or scope of the applicant's overall inventive concept.

Claims

1. A system for assembling a non-pneumatic tire structure, the system comprising: a curing envelope sized and configured to receive the upper annulus and circumferential tread of the non-pneumatic tire structure; and A tensioning system, the tensioning system comprising: a first sealing ring; a second sealing ring; and a plurality of tensioners connecting the first sealing ring and the second sealing ring to each other, each tensioner of the plurality of tensioners comprising: a first head portion configured to be attached to the first sealing ring; a second head portion configured to be attached to the second sealing ring; a connector member connecting the first head and the second head to each other; and an adjustment mechanism configured to allow adjustment of the distance between the first head and the second head, wherein the tensioning system compresses the curing envelope against the non-pneumatic tire structure using the adjustment mechanism to form a substantially airtight seal between the curing envelope and the non-pneumatic tire structure.

2. The system of claim 1 , wherein each of the plurality of tensioners comprises a first body and a second body, the connector member connecting the first body and the second body to each other, and wherein the adjustment mechanism comprises a first adjustment mechanism and a second adjustment mechanism, the first adjustment mechanism attaching the first head to the first body and the second adjustment mechanism attaching the second head to the second body.

3. The system of claim 1 , wherein each of the plurality of tensioners includes a body having a first portion and a second portion, the adjustment mechanism connecting the first portion and the second portion to each other, and wherein the connector member includes a first connector member connecting the first head to the first portion of the body and a second connector member connecting the second head to the second portion of the body.

4. The system of claim 1, wherein the adjustment mechanism comprises a threaded channel that receives a threaded rod.

5. The system of claim 1 , wherein the first and second sealing rings each include a plurality of slots, and wherein the first and second head portions each include a reduced diameter portion, the slots receiving the reduced diameter portions to attach the first and second head portions to the first and second sealing rings, respectively. 6 . The system of claim 5 , wherein the first and second sealing rings include a first edge and a second edge, and wherein each slot of the plurality of slots extends radially inward from the second edge toward the first edge. The system of claim 1 , wherein the connector member is a flexible member.

8. The system of claim 1 , wherein the curing envelope includes a top and first and second sides extending from the top, the first and second sealing rings respectively pressing the first and second sides against opposing sides of the non-pneumatic tire structure to form the substantially airtight seal.

9. The system of claim 1, wherein the first and second sealing rings compress the first and second sides, respectively, against the upper ring of the non-pneumatic tire structure.

10. The system of claim 9, wherein the first side and the second side are sized such that when the curing envelope receives the upper annulus and the circumferential tread of the non-pneumatic tire structure, the first side and the second side do not extend to a support structure.

11. A method for making a non-pneumatic tire, the method comprising the following steps: providing a tire structure comprising a lower ring, an upper ring, and a support structure extending between the lower ring and the upper ring, the lower ring having a first diameter, the upper ring having a second diameter greater than the first diameter, the upper ring being substantially coaxial with the lower ring; providing an elastomeric tread circumferentially around a top portion of the upper ring; receiving the tire structure and the elastomeric tread in a curing envelope; disposing a tensioning system around the cured blanket, the tensioning system comprising a first sealing ring, a second sealing ring, and a plurality of tensioners connecting the first sealing ring and the second sealing ring to each other, each tensioner of the plurality of tensioners comprising an adjustment mechanism; forming a substantially airtight environment defined by the curing envelope and the tire structure by adjusting each of the adjustment mechanisms so that the first sealing ring and the second sealing ring press the curing envelope against the tire structure to form a substantially airtight seal between the curing envelope and the tire structure; as well as Heat is introduced into the substantially airtight environment.

12. The method of claim 11, further comprising introducing pressure into the substantially airtight environment.

13. The method of claim 11 , wherein each of the plurality of tensioners comprises a first body and a second body, the connector member connecting the first body and the second body to each other, and wherein the adjustment mechanism comprises a first adjustment mechanism and a second adjustment mechanism, the first adjustment mechanism attaching the first head to the first body and the second adjustment mechanism attaching the second head to the second body, and wherein the step of creating a substantially airtight environment comprises adjusting at least one of the first adjustment mechanism and the second adjustment mechanism to reduce a distance between the first head and the second head.

14. The method of claim 11 , wherein each of the plurality of tensioners includes a body having a first portion and a second portion, the adjustment mechanism connecting the first portion and the second portion to each other, and wherein the connector member includes a first connector member connecting the first head to the first portion of the body and a second connector member connecting the second head to the second portion of the body, and wherein the step of creating a substantially airtight environment includes adjusting the adjustment mechanism to reduce a distance between the first head and the second head.

15. The method of claim 11 further comprising placing a core material between the elastomeric tread and the curing envelope.

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