CN114290581A - Tire electromagnetic induction microwave vulcanization equipment and method - Google Patents
Tire electromagnetic induction microwave vulcanization equipment and method Download PDFInfo
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Abstract
The invention discloses tire electromagnetic induction microwave vulcanization equipment and a method, wherein the equipment comprises an outer mold and an inner structure, wherein the outer mold comprises a base, a mold sleeve, an upper cover fixing piece, an upper cover, an upper side mold, an upper mold, an arch-shaped seat, a guide strip, a friction reducing plate, a pattern block, a tire structure, a lower mold, a lower side mold and an air inlet mechanism; the internal structure comprises a magnetron, a waveguide, a sulfur stirrer and a forming drum. According to the vulcanizing method, the outer die is heated by electromagnetic induction, the inner nitrogen expands and is heated by penetrating microwave irradiation, the electromagnetic coil is reasonably wound in the outer die, the outer die is heated by the electromagnetic induction effect through high-frequency alternating current during vulcanization, and the temperature uniformity is better; when the microwave vulcanizing device is used for microwave vulcanization, electromagnetic waves are absorbed by all parts of an object and are converted into heat energy, so that a large temperature gradient caused by low heat conduction speed is avoided, the vulcanizing temperature is more uniform, only the heated object absorbs microwave heat for microwave vulcanization, and the secondary energy utilization process is not wasted again.
Description
Technical Field
The invention relates to the field of tire production and manufacturing, in particular to tire electromagnetic induction microwave vulcanization equipment and a tire electromagnetic induction microwave vulcanization method.
Background
Tire vulcanization is the last step of tire manufacturing, and the vulcanization quality directly affects the quality and the yield of finished tires. The traditional outer mold of the vulcanization process adopts steam heating, a steam channel and a steam chamber are arranged in a hot plate and a mold sleeve, and in order to ensure better heating effect, the channel and the steam chamber are generally complex and have high processing and manufacturing cost; in addition, most of the existing tire vulcanization processes are capsule vulcanization and mainly comprise a superheated water vulcanization process and a steam vulcanization process. The superheated water vulcanization process takes superheated water as a medium, and has the advantages of stable property, good appearance quality of a tire vulcanized greatly, high qualification rate, long low vulcanization time at a temperature and low efficiency; the steam vulcanization is carried out by taking saturated steam as a medium, the temperature is high, the vulcanization time is short, but the pressure is low, so that the defects of the tire are easily caused, and the whole quality of the tire is influenced. In addition, the rubber has low thermal conductivity, so that the temperature unevenness is high, and the phenomena of external over-vulcanization and internal under-vulcanization occur. Therefore, aiming at the defects of the existing inner and outer molds, the invention provides the tire electromagnetic induction microwave vulcanization equipment and the tire electromagnetic induction microwave vulcanization method with the outer mold electromagnetic induction heating and the inner nitrogen expansion and microwave irradiation penetrating heating.
Disclosure of Invention
The invention provides a tire electromagnetic induction microwave vulcanization device and a tire electromagnetic induction microwave vulcanization method, aiming at solving the problems that a large amount of heat energy is consumed in the conveying process of the traditional heating mode, the temperature control and the pressure control are not uniform, the heating efficiency is low, in addition, the soft capsule has the defects of poor heat conductivity, non-uniform mass distribution, high energy consumption and the like in the vulcanization process.
In order to solve the technical problems, the invention adopts the technical scheme that: a tire electromagnetic induction microwave vulcanization device comprises an outer mold and an inner structure, wherein the outer mold is heated by electromagnetic induction, and the inner structure is heated by nitrogen expansion and microwave irradiation penetration; the outer die comprises a base, a die sleeve, an upper cover fixing piece, an upper cover, an upper side die, an upper die, an arch-shaped seat, a guide strip, a friction reducing plate, a pattern block, a tire structure, a lower die, a lower side die and an air inlet mechanism; the internal structure comprises a magnetron, a waveguide, a sulfur stirrer and a forming drum; the outer mould base is provided with a mould sleeve, the mould sleeve is connected with the upper cover fixing piece through a bolt, in order to ensure that the mould sleeve moves on the inclined plane of the arched seat, the guide strip and the antifriction plate are fixed together with the mould sleeve through the bolt to play a role of limiting and guiding, eight arched seats are distributed on the base, the arched seats respectively correspond to eight pattern blocks, in order to increase the contact area between the eight pattern blocks, good thermal conductivity is kept, the contact surface is designed as an inclined plane, then the pattern blocks are directly contacted with the pattern blocks to form a formed tyre, the pattern blocks, an upper side mould, a lower side mould, an upper mould and a lower mould are formed by the outer mould and the tyre through direct contact, the external shape of the tyre structure is determined through electromagnetic induction heating, the internal structure depends on the pre-vulcanization and microwave vulcanization of the inner lining layer by a forming drum, the forming drum performs primary shaping on the inner lining layer through the electromagnetic induction heating, and hot nitrogen is introduced for pressure stabilization in the final vulcanization stage, and (3) vulcanizing by adopting microwave radiation.
The further technical scheme comprises the following steps:
the invention relates to an electromagnetic induction microwave vulcanizing device for a tire, wherein an outer mold adopts an outward-type segmented mold structure which is a structure with a convex opening. The structure is improved based on the original segmented mold structure, the upper mold, the lower mold, the upper mold and the lower mold are structurally improved, and the integral structure of the processed tire is ensured to be complete. Compared with the inward type with the concave seam allowance, the tire vulcanizing machine is characterized in that the opening of the mold is larger, the bladder and the tire can be taken out more easily after vulcanization is finished, and the problem that the inner mold is difficult to take out of the vulcanizing machine is effectively solved.
The invention relates to a tire electromagnetic induction microwave vulcanization device, wherein an electromagnetic heating device heats a hot plate, heat is transferred to a mold inwards, a plurality of circular holes are formed in a coil plate for placing electromagnetic coils, the electromagnetic coils are arranged on the coil plate in a staggered mode, eddy current is generated by the hot plate to generate induction heat, meanwhile, heat insulation plates are arranged above and below the coil, the heat insulation plates are made of a magnetism-insulating material, only the hot plate generates heat in the heating process, and no external heat source is used, so that the heating mode is point heating, the hot plate is uniformly heated, and the temperature is uniformly distributed.
The invention relates to a tire electromagnetic induction microwave vulcanization device which comprises an outer mold electromagnetic induction heating device, an inner nitrogen expansion device and a microwave irradiation penetrating heating device, wherein the electromagnetic induction heating device is an indirect non-contact heating device, and the heat efficiency can reach 90%. Due to the non-contact characteristic of electromagnetic induction heating, when a new hot plate and a new die sleeve are designed, a steam channel does not need to be designed, so that the manufacturing cost of the hot plate and the die sleeve can be reduced; in order to ensure reasonable heat distribution during heating, the installation positions of the heating units are divided into four layers from outside to inside, each layer is circumferentially and uniformly arranged, and 12-8-4-4 heating units are respectively arranged on each layer from outside to inside, and the total number of the heating units is 28. In addition, the hot plate is provided with process holes matched with other mechanisms, and the center of the hot plate is provided with 1 larger process hole, so that the heat exchange with the outside is fast.
Based on the device, the invention adopts a tire electromagnetic induction microwave vulcanization method, which comprises the steps of electromagnetic induction heating of an outer mold, nitrogen expansion and microwave irradiation penetrating heating of an internal structure, is different from the heating of a steam heating medium directly through heat transfer, the electromagnetic induction heating is non-contact heating, the vulcanization temperature of the tire vulcanization outer mold can be provided, high-frequency alternating current is introduced into an induction coil to generate a high-frequency alternating magnetic field, the outer mold cuts magnetic lines in the magnetic field, eddy current is further generated, the temperature required by vulcanization is provided, the uniform heating of the outer mold can be realized, and the tire electromagnetic induction microwave vulcanization device has the excellent characteristics of high efficiency, energy saving, safety and environmental protection; in addition, the inside of the tire adopts a molding drum prevulcanization technology and a nitrogen expansion and microwave vulcanization technology, the method has the characteristics of energy conservation and high efficiency, any medium is not needed, and the tire can be heated at normal temperature.
The invention relates to a tire electromagnetic induction microwave method, which comprises the steps of electromagnetic induction heating of an outer mold, expansion of internal nitrogen and penetration heating of microwave irradiation, wherein an electromagnetic coil is reasonably wound in the outer mold, and the heating of the outer mold is realized by utilizing an electromagnetic induction effect through high-frequency alternating current during vulcanization.
The invention relates to a tire electromagnetic induction microwave method, which comprises the following steps that firstly, an inner liner layer is pre-vulcanized on a forming drum, the inner liner layer is pre-wrapped on the forming drum, an electromagnetic induction heating system is used for heating the forming drum to realize pre-vulcanization and shaping of the inner liner layer, magnetizers and coils are distributed on the forming drum, a coil groove is made of stainless steel or alumina without magnetic conductivity, and temperature detection elements are arranged at different positions of the forming drum to monitor the temperature in real time; forming a basic tire shape by a semi-finished product which is prepared by properly processing the rubber of the inner liner layer through electromagnetic induction heating under certain external conditions to form a pre-vulcanized inner liner layer, then wrapping a cord fabric layer, a wear-resistant layer, a carcass framework layer, a cap ply layer, a tire bead and a buffer layer on the pre-vulcanized inner liner layer by layer, and finally forming the pre-vulcanized inner liner layer into a belt layer blank;
secondly, assembling a tire blank, namely replacing a vulcanization capsule on the central structure of the conventional tire shaping vulcanizer with a forming drum structure, directly assembling the tire blank, the forming drum and a piston rod on the vulcanizer, wherein the forming drum is in a fully expanded state, and the piston rod is provided with a stirrer which rotates in a furnace chamber, so that the uniformity of microwave distribution transmitted in a waveguide tube is improved;
thirdly, vulcanizing, namely, keeping the base still, pressing the hydraulic cylinder downwards, simultaneously descending the upper cover plate and the arch-shaped seat, when the arch-shaped seat descends to the base, the upper cover plate of the vulcanizing machine continuously drives the die sleeve to move downwards, the pattern blocks of the arch-shaped seat contract inwards under the action of the guide strips, and when the pattern blocks completely contract to be in contact with the outer surface of the green tire, a complete die assembly state is achieved; after the mold is locked, high-temperature and high-pressure nitrogen is introduced into the air inlet mechanism, the sealing structure ensures sufficient temperature and pressure in the cavity in the vulcanization stage, a nitrogen heating device and a nitrogen circulating device are also needed to be arranged, and a check valve is arranged between the nitrogen heating device and the nitrogen circulating device to control the flow direction of the nitrogen; then the magnetron converts the electric energy into microwave energy, the microwave is transmitted into the cavity through the waveguide tube, and the excitation state of the coupling port is continuously changed by utilizing the periodic change of the refraction action of the stirrer blade, so that the uniformity of the microwave field distribution in the cavity is improved, the green tire is vulcanized more uniformly, and the stirrer shaft is made of polytetrafluoroethylene non-metal materials with high mechanical strength and low dielectric loss; secondly, the segmented mold is heated by adopting an electromagnetic induction heating mode, high-frequency alternating current is introduced into an induction coil to generate a high-frequency alternating magnetic field, magnetic lines of force are cut to generate eddy current to form vulcanization temperature, the coils are mainly distributed at corresponding positions of an upper hot plate, a lower hot plate and a mold sleeve, the installation positions of the coils are divided into four layers from outside to inside, each layer is uniformly distributed in the circumferential direction, 12-8-4-4 coils are respectively distributed on each layer from outside to inside, the total number of the coils is 28, in addition, process holes matched with other mechanisms are formed in the hot plates, and 1 large process hole is formed in the center and can quickly exchange heat with the outside;
fourthly, removing the tire, after the tire vulcanization is completed, filtering nitrogen in the vulcanizing machine in a nitrogen recovery filter after the nitrogen is subjected to steam-water separator and freeze drying treatment, and conveying the filtered nitrogen to a recovered nitrogen storage tank for later use; when the segmented mold is opened, the upper cover plate of the vulcanizing machine drives the mold sleeve and the upper mold of the mold to be lifted upwards, and in the lifting process, the mold sleeve and the arched seat form an inclined angle of 15 degrees and guide strips between the mold sleeve and the arched seat, so that the arched seat drives the pattern block to move radially, the pattern block and the arched seat are separated from the tire, and the tire is demolded to obtain a formed tire.
The invention relates to a tire electromagnetic induction microwave vulcanization method, which comprises the steps of electromagnetic induction heating of an outer mold, expansion of internal nitrogen and penetration heating of microwave irradiation, wherein the internal structure of a tire adopts nitrogen with higher pressure as a medium to shape a tire blank, the nitrogen expansion enables the shaping to be more stable, the change rate of the volume of the nitrogen is small, the abnormal abrasion of the tire can be greatly reduced, in addition, the microwave has the advantages of greenness, high efficiency and continuous production, the vulcanization process by adopting the radiation heating is very clean, the energy consumption is less, the operation at room temperature can be realized, and the vulcanization time is short.
The invention relates to a tire electromagnetic induction microwave vulcanization method, which comprises the steps of electromagnetic induction heating of an outer mold, expansion of internal nitrogen and penetration heating of microwave irradiation, wherein a large amount of nitrogen is required for shaping in the microwave vulcanization stage, nitrogen in a low-pressure nitrogen storage tank is pressurized and then sequentially enters a high-pressure nitrogen buffer tank and a high-pressure nitrogen storage tank, then the nitrogen is conveyed to a nitrogen heater for heating, the cutting-off device arranged between the high-pressure nitrogen storage tank and the nitrogen heater is used for controlling the amount of related nitrogen, and the heated high-temperature and high-pressure nitrogen enters a vulcanizing machine for vulcanizing a tire.
The invention relates to a tire electromagnetic induction microwave vulcanization method, which comprises the steps of electromagnetic induction heating of an outer mold, expansion of internal nitrogen and penetration heating of microwave irradiation, and aims at the problem of temperature difference gradient caused by thermal conductivity in the traditional vulcanization.
The invention relates to a tire electromagnetic induction microwave vulcanization method, which comprises the steps of electromagnetic induction heating of an outer mold, expansion of internal nitrogen and penetration heating of microwave irradiation, wherein the radiation vulcanization technology is a technology for realizing carbon-carbon crosslinking of a tire rubber material by utilizing rays (electron beams or Y rays) at normal temperature and normal pressure without adding auxiliary agents such as a vulcanizing agent, an accelerant and the like, and the performances of the material such as temperature resistance, wear resistance, corrosion resistance, pressure resistance, tensile strength and the like can be improved. At present, radiation vulcanization can effectively improve the deformation of a tire body, thin tire components, improve the phenomenon of uneven tire vulcanization, reduce the vulcanization time, improve the strength and the durability of the tire and the like, and particularly has great effect on saving rubber materials and reducing the cost.
The invention relates to a tire electromagnetic induction microwave vulcanization method, which comprises the steps of electromagnetic induction heating of an outer mold, expansion of internal nitrogen and penetration heating of microwave irradiation.
The invention relates to a tire electromagnetic induction microwave vulcanization device and a tire electromagnetic induction microwave vulcanization method, which comprise outer mold electromagnetic induction heating, internal nitrogen expansion and microwave irradiation penetrating heating, wherein microwave and heat energy are two different energy forms, and microwave electromagnetism is converted into heat energy to provide heat in the vulcanization process, so that the vulcanization process is greatly related to the polarization of molecules in substances. The medium molecules of the polarity in the tire carry out high-frequency molecular oscillation back and forth under the action of the high-frequency alternating magnetic field to generate a large amount of heat energy, thereby realizing the heating vulcanization from inside to outside, adopting the microwave heating to ensure that the temperature inside and outside the tire is uniform, and the greatest advantage of the microwave heating lies in that the heat is generated from the inside of a heated object, so that the heated object is called a heating body, thereby overcoming the defects that the external temperature of the tire reaches the vulcanization temperature quickly under the traditional vulcanization process, and the internal temperature is promoted for a long time.
Drawings
FIG. 1 is a schematic view of the overall assembly of an electromagnetic induction microwave curing apparatus for tires in accordance with the present invention;
FIG. 2 is an overall side cross-sectional view of a tire electromagnetic induction microwave curing apparatus of the present invention;
FIG. 3 is an overall top cross-sectional view of a tire electromagnetic induction microwave curing apparatus of the present invention;
FIG. 4 is a hot plate configuration of a tire electromagnetic induction microwave curing apparatus of the present invention;
FIG. 5 is a block diagram of a building drum electromagnetic induction heating system.
In the figure: 1, a base; 2, a die sleeve; 3, fixing the upper cover; 4, covering the cover; 5, hot plate; 6, upper side die; 7, an upper die; 8, an arched seat; 9, a guide strip; 10, a friction reducing plate; 11, pattern blocks; 12, tire structure: 13, a lower die; 14, a lower side die; 15, an air inlet mechanism; 16, stirrer: 17, a forming drum; 18, a sealing structure; 19, a piston rod; 20, a magnetizer; 21, a coil.
Detailed Description
The invention relates to a tire electromagnetic induction microwave vulcanization device, as shown in figures 1 and 2, which mainly comprises a segmented mold and a forming drum structure, wherein a segmented mold base 1 and a mold sleeve 2 are separated from each other in the mold opening stage and are contacted with each other in the mold closing stage, the mold sleeve 2 and an upper cover fixing part 3 are connected through a bolt, as shown in figure 3, a guide strip 9 and an antifriction plate 10 are fixed with the mold sleeve through a bolt to play a role in limiting and guiding, in addition, 8 arc-shaped seats 8 are distributed in the mold sleeve, the mold sleeve is ensured to move on a 15-degree inclined plane of the arc-shaped seats in the mold opening and closing stage, the arc-shaped seats are respectively corresponding to 8 pattern blocks 11, in order to increase the contact area and keep good heat conductivity and stability, the contact surface is designed to be an inclined plane, the arc-shaped seats and the pattern blocks are connected together through bolts and are contacted with each other through the guide strip 9 to move in a radial direction, the pattern blocks are directly contacted with a tire 12, the external contact surface of the tire is respectively provided with a pattern block 11, an upper side die 6, a lower side die 14, an upper die 7 and a lower die 13, the pattern block is internally provided with a pattern which is specific to each tire, the upper side die, the lower side die and the upper die also determine the overall external structure of the vulcanized tire, the upper cover 4 and the lower base 1 are respectively provided with a hot plate 5, and the upper surface of the hot plate is distributed with a large number of electromagnetic induction coils 21 and a temperature monitoring element for electromagnetic induction heating; as shown in fig. 5, a magnetizer 20 and a coil 21 are distributed on the forming drum 17 for heating the inside liner layer in a prevulcanization manner, the forming drum 17 wraps the inside liner layer to perform prevulcanization shaping to form the prevulcanization inside liner layer, in addition, an air inlet mechanism, a stirrer 16 and a sealing structure 18 are arranged on the piston rod 19, high-temperature high-pressure nitrogen enters from the feeding mechanism 15 to reach the temperature and the pressure required by vulcanization, then a magnetron converts electric energy into microwave energy, the microwave is transmitted into the cavity through a waveguide tube, and the uniformity of microwave field distribution in the cavity is improved by utilizing the periodic change of the blade refraction action of the stirrer 16, so that medium molecules with polarity in the tire perform high-frequency molecular oscillation back and forth under the action of a high-frequency alternating magnetic field to generate a large amount of heat energy, thereby realizing heating vulcanization from inside to outside.
The invention relates to a tire electromagnetic induction microwave vulcanization method, which comprises the steps of electromagnetic induction heating of an outer mold, electromagnetic induction heating pre-vulcanization of an inner forming drum and microwave irradiation penetrating heating, and comprises the following process flows:
firstly, pre-vulcanizing an inner liner on a forming drum 17, firstly, pre-wrapping the inner liner on the forming drum, heating the forming drum by using an electromagnetic induction heating system to realize pre-vulcanizing and shaping of the inner liner, as shown in fig. 5, a magnetizer 20 and a coil 21 are distributed on the forming drum, a coil groove is made of stainless steel or alumina without magnetic conductivity, and temperature detection elements are arranged at different positions of the forming drum to monitor the temperature in real time; and (3) performing electromagnetic induction heating to form a tire basic shape by a semi-finished product which is prepared by properly processing the rubber of the inner liner layer under a certain external condition in an electromagnetic induction heating mode to form the pre-vulcanized inner liner layer. Then, wrapping a cord fabric layer, a wear-resistant layer, a carcass framework layer, a cap ply layer, a tire bead and a buffer layer on the pre-vulcanized inner liner layer by layer, and finally forming a belt ply tire blank;
secondly, assembling a tire blank, as shown in fig. 2, replacing a vulcanization capsule on the central structure of the existing tire shaping vulcanizer with a forming drum structure 17, directly assembling the tire blank and the forming drum together with a piston rod 19 on the vulcanizer, wherein the forming drum is in a fully expanded state, the piston rod 19 is provided with a stirrer 16, and the stirrer rotates in a furnace chamber, so that the uniformity of the microwave distribution transmitted in a waveguide tube is improved;
thirdly, vulcanizing, as shown in fig. 2 and 3, the base 1 is not moved, the hydraulic cylinder is pressed downwards, the upper cover plate 4 and the arch-shaped seat 8 are simultaneously lowered, when the arch-shaped seat 8 is lowered to the base 1, the upper cover plate of the vulcanizing machine continuously drives the mold sleeve 2 to move downwards, the pattern blocks 11 of the arch-shaped seat 8 are contracted inwards under the action of the guide strips 9, and when the pattern blocks are completely contracted to be in contact with the outer surface of a green tire, a completely mold closing state is achieved; after the mold is locked, high-temperature and high-pressure nitrogen is introduced into the air inlet mechanism 15, the sealing structure 18 ensures sufficient temperature and pressure in the cavity in the vulcanization stage, a nitrogen heating device and a nitrogen circulating device are also needed to be arranged, and a one-way valve is arranged between the nitrogen heating device and the nitrogen circulating device to control the flow direction of the nitrogen; then the magnetron converts the electric energy into microwave energy, the microwave is transmitted into the cavity through the waveguide tube, and the excitation state of the coupling port is continuously changed by utilizing the periodic change of the refraction action of the stirrer blade, so that the uniformity of the microwave field distribution in the cavity is improved, the green tire is more uniformly vulcanized, and in addition, in order to prevent the microwave energy from leaking along the stirrer shaft, the magnetron is mostly made of polytetrafluoroethylene non-metal materials with high mechanical strength and low dielectric loss; secondly, the segmented mold is heated by adopting an electromagnetic induction heating mode, high-frequency alternating current is introduced into an induction coil to generate a high-frequency alternating magnetic field, magnetic lines of force are cut to generate eddy current to form vulcanization temperature, the coils are mainly distributed at corresponding positions of an upper hot plate 5, a lower hot plate 5 and a mold sleeve 2, as shown in a small circle of a coil distribution mode shown in figure 4, in order to ensure reasonable heat distribution during heating, the installation positions of the small circles of the heating units are divided into four layers from outside to inside, each layer is uniformly distributed in the circumferential direction, 12-8-4-4 heating units are respectively distributed from outside to inside, the total number of 28 heating units are provided, in addition, process holes matched with other mechanisms are formed in the hot plates, and 1 large process hole in the center is subjected to heat exchange with the outside quickly;
fourthly, tire unloading, as shown in fig. 1 and 2, after tire vulcanization is completed, nitrogen in a vulcanizing machine enters a nitrogen recovery filter for filtration after being subjected to steam-water separator and freeze drying treatment, and the filtered nitrogen is conveyed to a recovered nitrogen storage tank for use; then when the segmented mold is opened, the upper cover plate of the vulcanizing machine drives the mold sleeve 2 and the upper mold 7 of the mold to be lifted upwards, and in the lifting process, because the mold sleeve 2 and the arch-shaped seat 8 have a 15-degree inclined plane included angle and the guide strip 9 between the mold sleeve and the arch-shaped seat, the arch-shaped seat 8 drives the pattern block 11 to generate radial movement, so that the pattern block and the arch-shaped seat are separated from the tire, and the tire is demolded and formed.
Claims (6)
1. The utility model provides a tire electromagnetic induction microwave vulcanization is equipped which characterized in that: the mold comprises an outer mold and an inner structure, wherein the outer mold is heated by adopting electromagnetic induction, and the inner structure is heated by adopting nitrogen expansion and microwave irradiation penetration; the outer die comprises a base, a die sleeve, an upper cover fixing piece, an upper cover, an upper side die, an upper die, an arch-shaped seat, a guide strip, a friction reducing plate, a pattern block, a tire structure, a lower die, a lower side die and an air inlet mechanism; the internal structure comprises a magnetron, a waveguide, a sulfur stirrer and a forming drum; the outer mould base is provided with a mould sleeve, the mould sleeve is connected with the upper cover fixing piece through a bolt, in order to ensure that the mould sleeve moves on the inclined plane of the arched seat, the guide strip and the antifriction plate are fixed together with the mould sleeve through the bolt to play a role of limiting and guiding, eight arched seats are distributed on the base, the arched seats respectively correspond to eight pattern blocks, in order to increase the contact area between the eight pattern blocks, good thermal conductivity is kept, the contact surface is designed as an inclined plane, then the pattern blocks are directly contacted with the pattern blocks to form a formed tyre, the pattern blocks, an upper side mould, a lower side mould, an upper mould and a lower mould are formed by the outer mould and the tyre through direct contact, the external shape of the tyre structure is determined through electromagnetic induction heating, the internal structure depends on the pre-vulcanization and microwave vulcanization of the inner lining layer by a forming drum, the forming drum performs primary shaping on the inner lining layer through the electromagnetic induction heating, and hot nitrogen is introduced for pressure stabilization in the final vulcanization stage, and (3) vulcanizing by adopting microwave radiation.
2. The tire electromagnetic induction microwave curing apparatus of claim 1 wherein: the outer mold adopts a structure with a convex opening.
3. The tire electromagnetic induction microwave curing apparatus of claim 1 wherein: electromagnetic heating device heats the hot plate, and the mould is placed to the inside transmission of heat, opens a plurality of round hole on the coil plate and places solenoid, adopts solenoid crisscross the arranging on the coil plate, and the hot plate produces eddy current and induced heat, sets up the heat insulating board simultaneously from top to bottom at the coil, and the heat insulating board is the material that insulates against magnetism.
4. The tire electromagnetic induction microwave curing apparatus of claim 3 wherein: the electromagnetic coils are heating units, the installation positions of the heating units are divided into four layers from outside to inside, each layer is uniformly arranged in the circumferential direction, 12-8-4-4 heating units are respectively arranged on each layer from outside to inside, the total number of the heating units is 28, the hot plate is provided with process holes matched with other mechanisms, and the center of the hot plate is provided with 1 larger process hole.
5. An electromagnetic induction microwave vulcanization method for tires is characterized by comprising the following steps: the method comprises the steps of electromagnetic induction heating of an outer die and nitrogen expansion and microwave irradiation penetrating heating of an internal structure, and comprises the following process flows:
firstly, pre-vulcanizing an inner liner on a forming drum, firstly, pre-wrapping the inner liner on the forming drum, heating the forming drum by using an electromagnetic induction heating system to realize pre-vulcanizing and shaping of the inner liner, wherein magnetizers and coils are distributed on the forming drum, a coil groove is made of stainless steel or alumina without magnetic conductivity, and temperature detection elements are arranged at different positions of the forming drum to monitor the temperature in real time; forming a basic tire shape by a semi-finished product which is prepared by properly processing the rubber of the inner liner layer through electromagnetic induction heating under certain external conditions to form a pre-vulcanized inner liner layer, then wrapping a cord fabric layer, a wear-resistant layer, a carcass framework layer, a cap ply layer, a tire bead and a buffer layer on the pre-vulcanized inner liner layer by layer, and finally forming the pre-vulcanized inner liner layer into a belt layer blank;
secondly, assembling a tire blank, namely replacing a vulcanization capsule on the central structure of the conventional tire shaping vulcanizer with a forming drum structure, directly assembling the tire blank, the forming drum and a piston rod on the vulcanizer, wherein the forming drum is in a fully expanded state, and the piston rod is provided with a stirrer which rotates in a furnace chamber, so that the uniformity of microwave distribution transmitted in a waveguide tube is improved;
thirdly, vulcanizing, namely, keeping the base still, pressing the hydraulic cylinder downwards, simultaneously descending the upper cover plate and the arch-shaped seat, when the arch-shaped seat descends to the base, the upper cover plate of the vulcanizing machine continuously drives the die sleeve to move downwards, the pattern blocks of the arch-shaped seat contract inwards under the action of the guide strips, and when the pattern blocks completely contract to be in contact with the outer surface of the green tire, a complete die assembly state is achieved; after the mold is locked, high-temperature and high-pressure nitrogen is introduced into the air inlet mechanism, the sealing structure ensures sufficient temperature and pressure in the cavity in the vulcanization stage, a nitrogen heating device and a nitrogen circulating device are also needed to be arranged, and a check valve is arranged between the nitrogen heating device and the nitrogen circulating device to control the flow direction of the nitrogen; then the magnetron converts the electric energy into microwave energy, the microwave is transmitted into the cavity through the waveguide tube, and the excitation state of the coupling port is continuously changed by utilizing the periodic change of the refraction action of the stirrer blade, so that the uniformity of the microwave field distribution in the cavity is improved, the green tire is vulcanized more uniformly, and the stirrer shaft is made of polytetrafluoroethylene non-metal materials with high mechanical strength and low dielectric loss; secondly, the segmented mold is heated by adopting an electromagnetic induction heating mode, high-frequency alternating current is introduced into an induction coil to generate a high-frequency alternating magnetic field, magnetic lines of force are cut to generate eddy current to form vulcanization temperature, the coils are mainly distributed at corresponding positions of an upper hot plate, a lower hot plate and a mold sleeve, the installation positions of the coils are divided into four layers from outside to inside, each layer is uniformly distributed in the circumferential direction, 12-8-4-4 coils are respectively distributed on each layer from outside to inside, the total number of the coils is 28, in addition, process holes matched with other mechanisms are formed in the hot plates, and 1 large process hole is formed in the center and can quickly exchange heat with the outside;
fourthly, removing the tire, after the tire vulcanization is completed, filtering nitrogen in the vulcanizing machine in a nitrogen recovery filter after the nitrogen is subjected to steam-water separator and freeze drying treatment, and conveying the filtered nitrogen to a recovered nitrogen storage tank for later use; when the segmented mold is opened, the upper cover plate of the vulcanizing machine drives the mold sleeve and the upper mold of the mold to be lifted upwards, and in the lifting process, the mold sleeve and the arched seat form an inclined angle of 15 degrees and guide strips between the mold sleeve and the arched seat, so that the arched seat drives the pattern block to move radially, the pattern block and the arched seat are separated from the tire, and the tire is demolded to obtain a formed tire.
6. The electromagnetic induction microwave curing method for tires according to claim 5, characterized in that: and in the microwave vulcanization stage of the third vulcanization step, a large amount of nitrogen is required for shaping, the nitrogen in the low-pressure nitrogen storage tank enters the high-pressure nitrogen buffer tank and the high-pressure nitrogen storage tank in sequence after being pressurized, then the high-pressure nitrogen is conveyed to the nitrogen heater for heating, the cut-off part arranged between the high-pressure nitrogen storage tank and the nitrogen heater is used for controlling the amount of the related nitrogen, and the heated high-temperature and high-pressure nitrogen enters the vulcanizing machine for vulcanizing the tire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210151590.2A CN114290581A (en) | 2022-02-18 | 2022-02-18 | Tire electromagnetic induction microwave vulcanization equipment and method |
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| CN202210151590.2A CN114290581A (en) | 2022-02-18 | 2022-02-18 | Tire electromagnetic induction microwave vulcanization equipment and method |
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| CN114290581A true CN114290581A (en) | 2022-04-08 |
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| CN202210151590.2A Pending CN114290581A (en) | 2022-02-18 | 2022-02-18 | Tire electromagnetic induction microwave vulcanization equipment and method |
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| CN (1) | CN114290581A (en) |
Cited By (5)
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|---|---|---|---|---|
| CN115091798A (en) * | 2022-06-17 | 2022-09-23 | 北京化工大学 | Capsule-free vulcanization molding process and equipment for 3D copying of tire |
| CN115256734A (en) * | 2022-09-28 | 2022-11-01 | 山东银宝轮胎集团有限公司 | Tire vulcanization heating device |
| CN115339138A (en) * | 2022-10-18 | 2022-11-15 | 山东科技职业学院 | Rubber vulcanization mould |
| CN115384092A (en) * | 2022-10-31 | 2022-11-25 | 山东玲珑轮胎股份有限公司 | Tire vulcanizing device and method |
| CN116604854A (en) * | 2023-07-20 | 2023-08-18 | 山东豪迈机械科技股份有限公司 | Vulcanizing equipment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115091798A (en) * | 2022-06-17 | 2022-09-23 | 北京化工大学 | Capsule-free vulcanization molding process and equipment for 3D copying of tire |
| CN115256734A (en) * | 2022-09-28 | 2022-11-01 | 山东银宝轮胎集团有限公司 | Tire vulcanization heating device |
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| CN115339138A (en) * | 2022-10-18 | 2022-11-15 | 山东科技职业学院 | Rubber vulcanization mould |
| CN115339138B (en) * | 2022-10-18 | 2022-12-13 | 山东科技职业学院 | Rubber vulcanization mould utensil |
| CN115384092A (en) * | 2022-10-31 | 2022-11-25 | 山东玲珑轮胎股份有限公司 | Tire vulcanizing device and method |
| CN115384092B (en) * | 2022-10-31 | 2022-12-20 | 山东玲珑轮胎股份有限公司 | Tire vulcanizing device and method |
| CN116604854A (en) * | 2023-07-20 | 2023-08-18 | 山东豪迈机械科技股份有限公司 | Vulcanizing equipment |
| CN116604854B (en) * | 2023-07-20 | 2023-09-19 | 山东豪迈机械科技股份有限公司 | Vulcanizing equipment |
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