Curing Bladder Systems for Improved Tire Quality

Improved identification and monitoring of bladders in tire curing presses to enable better tracking, maintenance, and quality control of the bladders over their lifespan. The bladder device has an RFID chip in the elastic bladder that can be read when the bladder is removed. The press clamping device also has an RFID chip with the bladder ID associated. This allows identifying the bladder even when covered during vulcanization. A database associates bladder ID with clamping ID. By recording bladder ID during assembly, it can be traced through presses and replaced if damaged. The bladder RFID is shielded during press use but still readable when removed.

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Tire manufacturing method and vulcanizer to reduce tire removal failures and denting during tire vulcanization. The method involves inflating the bladder after deflation, then deflating again before removing the tire. This prevents the tire from sticking to the mold and bladder when removing it, reducing the risk of damage. The vulcanizer has a mechanism to open the mold, deflate the bladder, inflate it again, then deflate again before removing the tire.

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Tire curing bladder with adjustable pressure zones to prevent over-vulcanization and improve tire quality. The bladder has internal partitions to separate and isolate regions of the tire cavity during curing. Each section has its own steam supply and valve to apply specific pressure. This allows different regions with varying rubber thicknesses to be vulcanized optimally without overcure. The partitions and connections prevent steam from bleeding between zones.

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Tire vulcanization system with energy recovery to improve efficiency and reduce waste in tire manufacturing. The system uses a closed loop for circulating the vulcanization medium between the storage device and bladder. A heat exchanger on the circulation pipeline extracts heat from the hot medium leaving the bladder and uses it to preheat the medium entering the bladder. This recovers and reuses the heat normally lost during cooling and recovery.

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Curing bladder for tires that allows proper drainage of air during the tire curing process to prevent blisters and defects on the inner surface of the tire. The bladder has a drainage zone on the external surface that contacts the green tire during curing. The drainage zone has channels that extend into an adjacent removal zone. The depth of the channels increases along their length from the drainage zone to the removal zone. This gradual depth increase facilitates air drainage while preventing the inner tire liner from blocking the channels.

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A bladder design for vulcanizing tires that allows controlled shrinking during vacuum deformation to prevent bladder sticking and make tire removal easier. The bladder has a frame with a sliding plate that moves up and down on cylinders. The bladder itself is mounted on the frame and has ribs inside. The ribs prevent the bladder from collapsing into corners when vacuumed, avoiding bladder-tire sticking. The sliding plate allows the bladder to be retracted completely to the corners for easier tire removal. This reduces bladder-tire contact during deformation and prevents bladder-tire adhesion.

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Tyre curing bladder with graduated thickness from center to shoulder to improve tire shaping and reduce cycle time. The bladder has a lower gauge at the center that gradually increases towards the shoulders. This configuration provides better heat transfer during curing and easier tire shaping compared to uniform thickness bladders. The thickness increases at a rate of 4-6% per 10mm interval from center to shoulder. The center merges gradually with the shoulder.

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Tire vulcanization equipment for electric heating vulcanizers that can precisely control the temperature of the heating medium inside the bladder. The equipment has a bladder with fixed structures at the top and bottom to enclose a cavity. A heater, gas circulation device, drive, and controller are added inside. The heater has temperature sensors at the inlet and outlet. The controller uses the sensors to adjust heater power and drive speed to maintain desired heating medium temperatures for vulcanization.

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Tire curing bladder with improved durability to prevent cracking of the exhaust port during tire vulcanization. The bladder has reinforcing ribs on the inner surface that intersect the exhaust ducts at an angle greater than 45 degrees and less than 60 degrees. This configuration restrains and restricts the expansion and deformation of the exhaust port to prevent cracking due to excessive expansion during vulcanization.

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A tire vulcanization bladder design for improving efficiency and ease of use in tire production. The bladder has a unique shape with separate shells connected by clamping edges. An integral reinforcement block at one end provides strength. The clamping edges close together to seal the tire cavity. A positioning rod with threaded holes and chambers connects the shells. An elastic device in one chamber holds a movable block in the other chamber. This allows controlled movement during vulcanization. The bladder shape and connections enable easier handling, better sealing, and consistent vulcanization compared to traditional bladders.

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Reducing the closing force required by tire vulcanization presses by using an annular bladder with a rim-shaped carrier instead of a full-size bladder. The annular bladder surrounds the tire rim and inflates to apply pressure during vulcanization. This allows using a smaller, lighter bladder system that is transportable and can be easily loaded and unloaded from the press. The rim shape of the bladder eliminates the need for closing force on the inner tire area, significantly reducing the press force requirement.

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Coating tire curing bladders with a siloxane polymer film to improve service life. The coating amount is 30-80 g/m2. The coating protects the bladder from aging due to oxygen, heat, and pressure during vulcanization. The siloxane polymer film prevents oxidation and deterioration of the bladder material, reducing stickiness, brittleness, and discoloration.

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A curing bladder for tires that allows better evacuation of air from between the bladder and the green tire during vulcanization. The bladder has a relief structure with narrow grooves and fine furrows on its external surface. The grooves are spaced apart and have shallow depths, while the furrows are even closer together and have very shallow depths. This pattern of channels allows efficient air evacuation from the bladder into the tire during curing.

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High-pressure nitrogen electromagnetic heating vulcanization device for tire curing that improves efficiency and uniformity compared to traditional methods. The device uses high-pressure nitrogen instead of water vapor or air for internal heating. It has a vulcanization mold with a bladder, a circulation pipeline, and a Roots blower compressor. Nitrogen enters at room temperature, circulates through the mold and heater, bypass valve, and blower. A separate drying circuit removes moisture. This provides uniform, high-pressure nitrogen heating inside the tire bladder without steam condensation or low-pressure nitrogen cooling issues.

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A tire vulcanization method and device to eliminate condensate formation and improve tire quality during vulcanization. The method involves using a closed-loop steam circulation system instead of continuously introducing new superheated steam. A steam condenser captures and condenses steam inside the tire bladder during vulcanization. The condensed water is pumped out and the recovered steam is reheated and reintroduced into the bladder. This eliminates condensate formation and prevents temperature inconsistencies. The steam circulation also recovers energy from the condensed steam and reduces environmental impact compared to exhausting it. The closed-loop system is controlled by a temperature sensor to monitor bladder temperature and adjust steam flow.

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Tire curing bladder design with optimized thickness for improved vulcanization efficiency. The bladder has a bead portion, a sidewall portion, and a shoulder portion that correspond to the corresponding tire sections. The bead section has a thickness of 8-9 mm, the sidewall section has a thickness of 10-11 mm, and the shoulder section has a thickness of 8-9 mm. This thickness distribution provides better vulcanization contact and heat transfer for optimal curing of the tire rubber.

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Vulcanization bladder for tire molding with improved resistance to cracking and leaks during high temperature, high pressure vulcanization cycles. The bladder has a protective layer attached to the inner and/or outer surfaces of the bladder body. The protective layer is made by reacting polymers with glass transition temperatures above and below -20°C. This provides elastomer and thermoplastic segments for mechanical strength and elasticity. The protective layer covers surface defects like cracks or leaks in recycled bladder bodies to prevent tire defects.

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Tire curing bladder design and curing method to improve tire curing efficiency. The bladder has a cavity with an inner surface that closely matches the shape of the tire being cured. The bladder also has an inflation port and a pressure relief valve. The inflation port allows air to be introduced into the bladder to inflate it. The pressure relief valve allows excess pressure to escape during the curing process to prevent rupture. The bladder is inserted into the mold with the tire and air is pumped into the bladder to apply uniform pressure and prevent deformation during curing. This improves tire quality and consistency. The bladder design closely matching the tire shape and the pressure relief valve prevent bladder rupture during high pressure curing.

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A tire curing bladder with improved contact pressure and fit in the tire shoulder area to prevent issues like uneven gauge, trapped air, and liner cracking. The bladder has a toroidal shape with opposing beads and a wave-shaped expansion section. The wave shape provides a larger radial stretch and higher contact pressure in the tire shoulder area compared to a flat expansion section. This improves bladder fit and prevents issues like bladder contacting the crown area at low pressures.

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Method for manufacturing pneumatic tires that reduces vulcanization temperature differences and improves tire rolling resistance. The method involves controlled purging of steam and gas from the bladder inside the tire mold during vulcanization. The purging involves stopping gas release when the bladder pressure drops to a certain value. This keeps the bladder pressure constant during purging and prevents excessive pressure drops that can affect vulcanization. This suppresses variation in vulcanization temperature difference due to the tire design, which improves tire uniformity and rolling resistance.

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