Tire Retreading Techniques for Prolonged Tire Lifespan

Retreaded tire with improved resistance to tread peeling off the base tire, especially at the shoulder regions. The retreaded tire has a tread rubber with a shoulder circumferential groove adjacent to the tread edge. This groove has a surface with multiple dimples. The dimples reduce heat buildup in the shoulder area during driving, preventing peeling. The tread also has narrow shoulder lateral grooves opening on the ground contacting surface and buttress surface. This configuration further reduces heat generation and peeling at the shoulder.

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Retread tire with improved resistance to separation of the recapped tread from the base tire, especially at high temperatures during driving. The retread has a recapped tread with a buttress surface extending inward from the tread edge. This buttress surface has a pattern of dimples with specific size and depth ranges. The dimples help prevent separation by dissipating heat and reducing stress concentration at the tread-base interface.

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Method for manufacturing retread tires using an automated molding process to improve quality, reduce costs, and enable customization compared to manual retreading. The process involves preparing a buffed tire, designing the tread extrusion shape based on the buffed tire profile, mapping it, calculating the required rubber amount, mounting the buffed tire in a rotating fixture, attaching the calculated rubber strip using an applicator calendar, inserting and molding in the curing mold, then removing the retreaded tire.

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Method for retreading tires using pre-vulcanized composite treads to reduce energy consumption and cost compared to traditional hot retreading. The method involves washing and inspecting the tire carcass, repairing any damage, then bonding a pre-vulcanized composite tread directly to the carcass using cold adhesive. The composite tread has layers like crown, transition, wing, and bottom. The pre-vulcanized tread is made by extruding or calendering the layers at temperatures below 100°C. This allows the tread to be attached at room temperature rather than vulcanizing the entire tire.

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Method for retreading large tires that extends the life of tires by selectively repairing and reusing them instead of replacing them when worn. The method involves a multi-step process to inspect, mill, repair, polish, vulcanize, and test the tires. It starts with an initial inspection to determine if the tire can be retreaded based on factors like exposed wire, damage beyond manufacturer limits, or contamination. If the tire passes, it's milled to expose the carcass, repaired, polished, vulcanized with a new tread, and inspected again. This allows selective retreading of tires that still have good carcasses instead of premature scrapping.

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Retreading method for waste solid tires that improves efficiency, utilization rate, and performance of retreaded tires. The method involves classifying waste solid tires based on damage levels before retreading. This allows shorter retreading times for less damaged tires versus longer times for severely worn tires. During retreading, carbon fiber powder is added to the tire core bonding process to enhance strength and rigidity of the retreaded tire.

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Cold retreading method for tires that allows high productivity and safety compared to traditional cold retreading without using autoclaves or envelopes. The method involves using cushioning pads with specific composition during the curing step. The cushion pads contain conductive materials like graphite, graphene, or carbon black. These pads are connected to a heat or power source during curing to provide radial pressure on the tire instead of using autoclaves. This eliminates the need for internal pressures, complex envelopes, and autoclave safety.

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Retreading tires at lower temperatures by priming the rubber surfaces with a treatment composition before adhering them with a urethane adhesive. The treatment composition contains a halogenating agent and solvent like water or alcohol. Applying multiple coating layers of the treatment enhances adhesion when cured. The primed rubber components are then sandwiched together with the urethane adhesive at lower temperatures for retreading. The low-temperature curing is enabled by the priming process.

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Retreading heavy duty tires with improved quality and longevity by inflating the diaphragm inside the tire to 15 bar before retreading. This eliminates air pockets between the diaphragm and tire inner surface that can deform the diaphragm during retreading and cause premature failure. The inflated diaphragm provides consistent pressure for optimal vulcanization of patches and uniform thickness of the retreaded tire.

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Truck tire design optimized for retreading to maintain performance and durability when the original tread wears out. The tire has a specific tread pattern for the drive wheels of a truck tractor that can be retreaded without compromising safety or longevity. The tire also has reinforcing belts with cables oriented at a specific angle to the tire circumference. This optimized tread and belt construction allows retreading while preserving the functional and structural cooperation between the tread and tire casing.

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Retreading tires without a curing chamber to enable tire retreading in remote locations. The method involves applying a primer to the inner surface of the tread and outer surface of the tire carcass, then applying an adhesive to the primed surfaces. The tread is attached to the carcass, and a moisture reservoir is placed around the tread. The assembly is enclosed in an envelope and left to cure at room temperature using the moisture in the reservoir. This allows retreading without a curing chamber or furnace.

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Retreading method for tires to improve wear resistance and extend tire life when retreading worn tires. The method involves using a reinforced resin glue with carbon nanotubes, tannic acid, and an organic silane coupling agent. The carbon nanotubes improve hardness and wear resistance. The reinforced resin glue is applied to retread the tire. The specific composition of the reinforced resin glue is: epoxy resin, white carbon black, neoprene, vulcanizing agent, and vulcanization accelerator. The carbon nanotubes make up 1.8-2.6% of the reinforced resin glue. The carbon nanotubes are dispersed in ethanol along with tannic acid and the silane coupling agent in a ratio of 15:3-4:1.

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Production process for retreading all-steel radial tires that improves retread durability and reduces failures compared to traditional retread methods. The process involves attaching a new annular tread segment to the worn tire carcass using a unique technique. The steps are: 1. Clean and prepare the worn tire. 2. Cut a new annular tread segment from natural rubber with super wear-resistant furnace black reinforcement. 3. Apply an antioxidant to the tread segment. 4. Attach the tread segment to the tire using a special adhesive film lamination process. 5. Cut the film at the ends to create a clean, angled joint between the old and new rubber. 6. Cure the retread tire to bond the new tread segment securely. This process provides a more consistent retread shape, reduces joint failures, and impro

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Cold retreading method for tires that allows faster and safer retreading compared to existing methods. The method involves using a conductive adhesive compound between the retread strip, cushion, and casing during curing. The compound contains 5-20% conductive material like graphene, graphite, or high surface area carbon black. This compound is connected to a heat source or power source during curing to transmit heat to the cushion. This eliminates the need for envelopes and autoclaves to compress the retread strip during curing, improving productivity and safety compared to existing cold retreading methods.

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Retreading a tire in order to extend the life of tires. The retreading process involves providing a tire casing, providing a cured rubber component having first and second planar surfaces, where the first planar surface includes a tread pattern, providing a cushion gum, wherein the cushion gum is a composition including a functional polymer including at least one functional group, and a crosslinking agent including at least two moieties that will react with the functional group of the functional elastomer.

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Self-healing tire with improved structure to provide better puncture protection and durability compared to conventional self-healing tires. The tire has a self-repairing rubber layer inside the inner liner, but also adds a limiting layer between the inner liner and outer ply. This limiting layer, containing an inner ply, fixes and seals the self-repairing rubber inside the liner. This prevents delamination and separating of the self-repairing rubber from the liner. The limiting layer also provides reinforcement and support for the self-repairing rubber.

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Method for manufacturing retread tires that allows reuse of worn tires with uneven treads. The method involves forming an adhesive layer on the worn tire's outer surface before attaching the new tread. The adhesive layer is applied by sequentially placing small adhesive elements on the tire surface. This ensures the adhesive coverage matches the uneven worn surface. The tire is then rotated while attaching the new tread, pressing it against the base tire with a roller. This ensures full contact between the new tread and base tire, even with the uneven worn surface. After attaching, the tire is irradiated with an electron beam to cure the adhesive. This joins the base tire and retread securely, promoting retread longevity.

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Retreading large mining tires to extend their life and reduce replacement costs in harsh environments. The method involves carefully repairing and reinforcing damaged areas of the tire carcass without replacing the entire tire. It involves cleaning the damaged area, applying a bonding agent, laying down a reinforcement patch, and curing the patch in place. This allows repairing punctures and cuts without compromising tire integrity and extends the life of the tire. The retreading is done in multiple layers to build up thickness and durability over time.

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Pre-vulcanized annular crown for super giant tires that can be retreaded more often and with better performance compared to traditional retreading methods. The crown is made separately and then attached to the carcass before final vulcanization. This allows reusing more old carcasses since the crown can be retreaded independently. The pre-vulcanized crown improves puncture resistance and wear compared to retreading just the tread.

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Pre-vulcanized annular crown for extra-jumbo tires that allows higher recycling of used tire carcasses compared to existing retreading methods. The crown is manufactured separately and has a ring shape. This allows using carcasses with damaged belt steel wires and tread areas that can't be retreaded with the current techniques. By peeling off the damaged parts and grinding the carcass to a ring shape, it can be retreaded by matching and attaching a new ring-shaped crown. This enables recycling carcasses with localized damage that can't be refurbished using traditional methods.

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