Tire Moulding Process Optimization

A device for uniformly spraying release agent inside tire molds during production to enable easy demolding of tires. The device has a rotating base with spray nozzles and rollers that grip the mold. It spins the mold to evenly coat the inside with release agent using fixed and inclined nozzles. This prevents uneven spraying when spraying piece by piece. The mold rotation allows complete coating without excess release agent buildup.

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Molding process and tire mold to reduce or eliminate the need for mold release agents when curing tires. The process involves injecting pressurized gas into the mold cavity after curing to assist in separating the cured tire from the mold. The tire mold has moving elements that open and close the mold, and channels to inject the gas into the cavity. This allows the gas to push against the tire and aid in releasing it from the mold when opened. The mold can also have features like coated surfaces and vacuum capabilities to further improve tire release.

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Rapid prototyping equipment for making automotive tire molds that enables faster cooling of the mold during the vulcanization process. The equipment has a rotating and sliding mechanism to move the upper and lower mold halves between injection, demolding, and cooling steps. The molds are mounted on rotating shafts that can be moved vertically by sliding blocks. This allows the molds to be rotated and moved relative to each other for efficient cooling and demolding. The molds can also be inserted into a water-cooled chamber to further enhance cooling. The rotating and sliding motion helps improve cooling effectiveness compared to fixed molds. The equipment also has injection, demolding, and rotation hydraulic cylinders, a controller, and pumps for circulation.

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Mold for vulcanizing tires that improves demolding of the molded tire. The mold has smear devices on the upper and lower mold surfaces to reduce friction and allow easier tire removal. The smear devices include sliding frames with sliders and springs. A storage box filled with release agent is connected to a motor. The motor moves the storage box to distribute the release agent onto the mold surfaces. This evenly coats the mold cavity to prevent sticking during demolding.

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A method and device for preparing non-pneumatic tires that enables efficient, consistent, and automated tire molding to improve durability and reliability. The method involves injecting the tread directly into the mold cavity between the rim and support areas, rather than attaching a preformed tread after bonding the rim and support. This allows the entire tire to be molded in one step. The mold has separate areas for the rim, support, and tread. The mold closes, the tread is injected, and the mold opens to eject the completed tire. The mold clamping and sliding mechanisms rotate to move the mold halves during closing and opening.

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A tire mold with fast opening and closing to improve injection efficiency and quality of bionic pattern tires. The mold has a unique shunt structure to evenly distribute the plastic material during injection. The mold has an upper and lower half connected by bolts. The upper half has an injection tube with an outer tube, inner pipe, and connecting pipe. Inside the connecting pipe is a circular elastic insert with a slot. A shunt tube is bonded below with a shunt bridge inside. This shunt structure allows the plastic material to flow into the mold evenly from multiple directions during injection, improving injection quality compared to single-line flow.

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A tire mold trim element with venting to facilitate demolding of large, complex tires. The trim element has a vent in the first stripping zone where the tire separates from the mold. This vent allows air to infiltrate between the tire and mold surface when the mold opens, creating a primer that aids in separation. The vent can connect to the mold cavity or external air to provide the infiltration.

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A clamp ring type tire mold that allows easy separation and cleaning after molding tires. The mold has a body surrounded by transfer support plates. Inside the body, a rotating sleeve is fixed to the body and connected to the transfer plates via fixed connecting plates. This allows rotation and translation of the body for easy removal of molded tires. To facilitate this, slide grooves in the body connect to limit slide plates with fixed round rods. This allows sliding and flipping of the body on one side to separate the molded tire.

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A secondary molding tire mold with improved durability for producing tires with inner reinforcements. The mold has separate upper and lower halves connected by chains. The upper half has a middle plate and inner tube molding cavity with a notch angle. The lower half has an outer tire molding cavity and a socket cavity. The inner tube and outer tire cavities are separate. This allows forming the inner reinforcement separately and then attaching it to the outer tire in a second molding step. This prevents cracking of the tire due to the inner reinforcement degrading over time.

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A tire mold release device for more effective and efficient demolding of tires during production. The device uses a centrifugal force-based release agent dispenser to apply mold release agent to the demolding area. It has a pump, tank, and motorized dispenser that squirts the release agent onto the mold when rotated at high speed. This ensures the release agent adheres to the mold before demolding, preventing splashing and poor release effect compared to spraying. The device also has features like supports, rubber pads, and connecting blocks to prevent displacement and disconnection during use.

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Method for applying a release agent to a mold used in manufacturing tires that ensures even coverage and prevents adhesion without using excessive amounts of the agent. The method involves precisely spraying the release agent onto the mold cavity surface based on its shape, rather than blanketing the entire surface. This is done by recognizing the cavity shape and determining the optimal spraying positions. The release agent is then applied at those locations as the nozzle moves along the cavity. This targeted spraying ensures complete coverage while minimizing waste compared to blanket application.

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Applying release agent to the inner surface of an unvulcanized tire to prevent adhesion during curing without scattering to the environment. The device has a casing to hold the tire, sprayers to apply release agent, and collectors to suck excess. The casing connects the tire's openings to the inner space. Sprayers apply release agent while moving relative to the tire. Collectors suck excess release from the inner space. Controlling sprayer and collector operations prevents bias and catches release agent.

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A method for manufacturing tires that provides consistent quality and prevents damage to the tire during demolding. The method involves cleaning the mold surfaces with laser to remove debris, applying a mold release agent, drying it, and vulcanizing the tire on the treated mold. This sequence ensures the release agent coating is even and prevents adhesion issues when demolding the tire. The release agent contains silicone oil, carbon black, and a volatile solvent like a low boiling point organic solvent.

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Automatic spraying device for tire mold release agent that enables even and automated coating of release agent inside tire mold cavities. The device has a spray mechanism with multiple nozzles that can be moved into position using electric push rods. The spray mechanism is raised and lowered to access different radius points inside the molds. A fan-shaped splitter plate with four connecting pipes distributes the release agent evenly across the nozzles. This allows automated and consistent coating of the mold cavities to prevent sticking during tire production.

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An injection molding machine and mold setup for efficiently manufacturing tire bead apexes. The setup involves using an injection molding machine to extrude rubber into a closed mold cavity shape that matches the apex. The mold has multiple inlets for feeding rubber from separate heads to ensure even filling. Temperature sensors monitor the mold and heating can be applied. This allows mass production of consistent, defect-free apexes compared to manual methods prone to thickness variations and separation.

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Tire mold design to reduce spew formation in tire sidewalls during molding. The mold has movable pieces that contact the upper and lower molds before closing. This prevents the low cover from getting caught between the molds and forming spews along the tread-sidewall boundary. The movable pieces abut the molds before full closure and then move inward to compress the rubber. This prevents the low cover from getting pinched between the molds and creating spews.

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Automated release agent application device for bladders in tire molding to eliminate excess release agent and prevent contamination. The device is mounted on the outer periphery of the bladder in the mold. It contains a cylindrical part with an inner sponge filled with release agent. When the bladder expands during molding, the sponge contacts the bladder and releases the agent automatically. This applies the right amount of release agent to the bladder without excess or flow issues.

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A rigid inner mold for forming tires that can be quickly and easily removed from vulcanized tires, improving productivity. The mold has an annular inner mold body with segments that can be separated along the circumference. A release coating on the mold surface prevents tire adhesion. This allows rapid extraction force without damage to the tire or mold. The segmented design reduces the force required to separate compared to a continuous mold. The release coating prevents tire sticking to the mold surface.

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Mold release agent composition for rubber molding that forms a good elastic coating on the bladder surface during molding and vulcanization of rubber products like tires. The composition contains polysiloxane, a surfactant, and water. The polysiloxane has reactive and non-reactive components with HLB7-18. The composition has specific viscosity and surface tension. It wettes and adheres well to the rubber on the bladder surface. This allows rapid film formation, excellent releasability, and reduced peeling during molding cycles. The composition replaces the inner paint and bladder coatings while eliminating VOC issues.

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Air hole tyre mold for segmental molding that allows uniformly distributing rubber in the mold cavity without air pockets, improving tire quality. The mold has an internal air channel network connecting the mold cavity to exhaust holes. This allows air to be purged during molding, preventing air pockets in the tire. The mold also has channels for cleaning and maintenance. The channel network enables thorough cleaning of the mold interior without removing the mold from the production line. This avoids time-consuming manual cleaning and reduces production costs.

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A method for manufacturing an unvulcanized annular hollow body that can be used as an internal pressure holding member for a safety tire, a tire tube, or the like, without adhesion issues during molding. The method involves forming a cylindrical member from two overlapped unsulfided rubber sheets, applying a mold release agent to the outer surface of the cylindrical member, folding back the ends to overlap, and then joining them to form the annular hollow body. This prevents peeling or falling off of the release layer during molding and prevents adhesion between inner surfaces. The release agent is applied over half the circumference, excluding the folded back ends, to prevent release layer intervention in the overlapped joint area.

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Tire molding device for efficient application of a mold release agent to prevent sticking during vulcanization. The device has a coating device that moves radially outward as the bladder expands during molding. The coating device applies the release agent to the bladder surface while rotating. This ensures even coating as the bladder rotates and contacts the tire. It simplifies the molding process compared to manually applying the release agent inside the tire. The release agent is also applied efficiently in a shorter time.

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Manufacturing a tire with a sealant chamber that has an accurate shape when vulcanizing the tire. The method involves using a release sheet with selective release properties. The inner liner is vulcanized onto the tire body before molding. Before molding, a release sheet with a non-releasable section facing the inner liner and a releasable section facing the tire body is placed between them. This prevents the inner liner from moving freely while allowing the tire body to bond. The releasable section detaches during vulcanization, leaving the inner liner attached to the tire body and forming the sealant chamber. The release sheet can be soluble in the sealant or made of water-soluble materials like paper or films of natural polysaccharides.

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Process and device for producing a reusable tire mold with non-removable patterned elements. The process involves forming the mold on a countermold with separate non-removable relief elements. The countermold has housing features around each element that open into the molding surface. A device with interlocking pieces allows precise placement of the elements in the housings. After casting, the mold can be removed without breaking the countermold. This allows reusing the countermold multiple times compared to disposable molds.

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