CN210256870U - Rigid inner mold assembly and vulcanization equipment comprising same - Google Patents

Abstract

The rigid inner mold assembly comprises: a rigid inner mold comprising a plurality of inner mold segments, the inner mold segments comprising a drum tile comprising a crown wall and upper and lower sidewalls formed at both ends of the crown wall. The inner mould section is provided with the heating piece, and this heating piece includes: a crown wall heating assembly located at a position corresponding to the crown wall to heat the crown wall; an upper sidewall heating assembly located at a position corresponding to the upper sidewall to heat the upper sidewall; and a lower sidewall heating assembly located at a position corresponding to the lower sidewall to heat the lower sidewall. The rigid internal mold component with the structure can effectively control heating and ensure that the temperature of the drum tiles is uniformly increased. Also relates to a vulcanization device comprising the rigid inner mold assembly.

Description

Rigid inner mold assembly and vulcanization equipment comprising same

Technical Field

The present invention relates to an apparatus for tire vulcanization, particularly to a tire mold included in the apparatus for tire vulcanization, and more particularly to an inner mold in the tire mold.

Background

In the manufacturing process of tires, it is necessary to vulcanize the tires. During the tyre vulcanisation process, the green tyre is loaded onto a tyre vulcanisation plant, in particular onto a tyre mould, and is vulcanised into a finished tyre through suitable treatments (for example heating, pressing, etc.) for a suitable time.

In the existing tire vulcanization process, the tire is usually vulcanized and shaped by inflating the bladder inside the tire, for example, the bladder is provided inside the tire and is filled with nitrogen, high-temperature steam, or the like.

There are problems with the capsule aeration process. For example, the bladder is flexible, it is difficult to apply sufficient pressure to the green tire in the inflated bladder to promote redistribution of the rubber, the thickness of the bladder walls is often different, the bladder expands with less dimensional accuracy, and the distribution of rubber during green tire molding is not uniform. These factors all contribute to the difficulty in achieving the desired uniformity and dynamic balance of the finished tire.

In response to the above-mentioned drawbacks of the bladder inflation vulcanization process, rigid internal mold technology has recently been developed in the industry to replace the bladder inflation process. The rigid inner mold comprises a plurality of segments which are radially expanded by the driving mechanism according to a preset program to press against the inside of the tire, thus exerting pressure on the tire, and which are radially collapsed by the driving mechanism according to a preset program after the vulcanization process is completed, thus allowing the operator to take off the vulcanized tire and load the green tire to be subsequently vulcanized onto the tire mold.

In the vulcanization process, the rigid inner mold is fixed in shape and can apply enough pressure to the tire blank, so that the rubber material flows, the rubber material can be redistributed, and the vulcanized tire can achieve better uniformity and dynamic balance.

However, there are problems with current rigid internal molds. For example, the current rigid inner mold uses a conventional method of injecting a heating fluid into an inner mold cavity to heat the rigid inner mold, so as to heat the tire. However, this heating method has a problem that the heating efficiency is low, it is difficult to control, and the heating fluid is easily leaked, and further, the inner mold is corroded by the heating fluid.

Therefore, there is a need for an improved structure of a rigid inner mold, and a tire mold and a vulcanizing apparatus including the same, which can solve the above-mentioned problems of the prior art.

SUMMERY OF THE UTILITY MODEL

The present invention is made in order to solve the above-mentioned technical problems of the prior art. The utility model aims at providing a rigidity centre form of improvement structure for tire mould, this rigidity centre form can be with modified mode internal heating, and this heating method is easily controlled, and heating efficiency is high

The above object of the present invention is achieved by a rigid inner mold assembly having the following structure, which comprises: a rigid inner mold comprising a plurality of inner mold segments, the inner mold segments comprising a drum tile comprising a crown wall and upper and lower sidewalls formed at both ends of the crown wall. Wherein, the centre form section is provided with the heating piece, and this heating piece includes: a crown wall heating assembly located at a position corresponding to the crown wall to heat the crown wall; an upper sidewall heating assembly located at a position corresponding to the upper sidewall to heat the upper sidewall; and a lower sidewall heating assembly located at a position corresponding to the lower sidewall to heat the lower sidewall.

In the rigid inner mold assembly of the above structure, a heating block is provided inside the drum tile, and a plurality of grouped heating elements, which may be electrically heated heating elements, are mounted on the heating block, thereby being safe. Energy is saved. And the heating elements correspond to all parts of the drum tile, so that the temperature difference caused by different sizes, shapes and the like at different positions can be eliminated by independently controlling all the heating elements, the uniform temperature rise in the heating process is ensured, and the vulcanization quality of the tire is improved.

Preferably, the crown wall heating assembly comprises at least one crown wall heating element, a crown wall heating hole extending along the circumferential direction or the tangential direction is formed on the heating block, and the crown wall heating element is installed in the corresponding crown wall heating hole; and/or the upper side wall heating assembly comprises at least one upper side wall heating element, upper side wall heating holes extending along the circumferential direction or the tangential direction are formed on the heating block, and the upper side wall heating element is installed in the corresponding upper side wall heating hole; and/or the lower sidewall heating assembly comprises at least one lower sidewall heating element, a lower sidewall heating hole extending along the circumferential direction or the tangential direction is formed on the heating block, and the lower sidewall heating element is installed in the corresponding lower sidewall heating hole.

Preferably, an upper shoulder portion is formed at a portion of an upper end of the crown wall adjacent to the upper sidewall, and a lower shoulder portion is formed at a portion of a lower end of the crown wall adjacent to the lower sidewall, an upper sub-mouth portion is formed at a position on a radially inner side of the upper sidewall corresponding to one side toe of the tire, and a lower sub-mouth portion is formed at a position on a radially inner side of the lower sidewall corresponding to the other side toe of the tire;

wherein, go up the lateral wall heating element and include: a first upper sidewall heating element positioned proximate the upper shoulder; and a second upper side wall heating element located radially inwardly of the first upper side wall heating element and adjacent the upper sub-mouth; and/or the lower sidewall heating assembly comprises: a first lower sidewall heating element positioned proximate to the lower shoulder; and a second lower side wall heating element located radially inwardly of the first lower side wall heating element and adjacent the lower sub-mouth.

Preferably, the axial distance between the first upper side wall heating element and/or the second upper side wall heating element and the outer wall surface of the upper side wall is within the range of 15-70 mm; and/or the axial distance between the first lower side wall heating element and the outer wall surface of the lower side wall and the second lower side wall heating element is within the range of 15-70 mm; and/or the radial distance of the crown wall heating element of the crown wall heating component from the outer wall surface of the crown wall is within the range of 10-60 mm.

Preferably, the inner mould section is switchable between a collapsed position and an expanded position; and, the inner die assembly further includes a drive assembly that drives the inner die segments between the collapsed position and the expanded position.

Preferably, the heating block is detachably connected to the drum tile at an outer side thereof, and the heating block is detachably connected to the connecting base at an inner side thereof; and/or the outer side surface of the heating block is tightly attached to the inner side surface of the drum tile, and the attachment area of the heating block is greater than 1/3 of the area of the inner side surface of the drum tile; and/or the drum tile is made of steel or cast iron material, and the heating block is made of aluminum alloy or aluminum-magnesium alloy material.

Preferably, the rigid inner mold assembly further comprises a temperature measuring device, the temperature measuring device comprising at least one of the following components: the crown wall temperature measuring component is arranged on the crown wall and comprises at least one crown wall temperature measuring element; the upper side wall temperature measuring component is arranged on the upper side wall and comprises at least one upper side wall temperature measuring element; and the lower side wall temperature measuring component is arranged on the lower side wall and comprises at least one lower side wall temperature measuring element.

Preferably, at least one crown wall temperature measuring hole extending along the radial direction is formed in the crown wall, and the crown wall temperature measuring element is installed in the crown wall temperature measuring hole; and/or the upper side wall temperature measuring component comprises a first upper side wall temperature measuring element and a second upper side wall temperature measuring element, a first upper side wall temperature measuring hole extending along the circumferential direction or the tangential direction of the upper side wall is formed in the circumferential side surface of the upper side wall, the first upper side wall temperature measuring element is arranged in the first upper side wall temperature measuring hole and/or a second upper side wall temperature measuring hole extending along the radial direction is formed in the inner circumferential side surface of the upper side wall, and the second upper side wall temperature measuring element is arranged in the second upper side wall temperature measuring hole; and/or the lower side wall temperature measuring component comprises a first lower side wall temperature measuring element and a second lower side wall temperature measuring element, a first lower side wall temperature measuring hole extending along the circumferential direction or the tangential direction of the lower side wall is formed in the circumferential side surface of the lower side wall, and the first lower side wall temperature measuring element is arranged in the first lower side wall temperature measuring hole; and/or the inner peripheral side surface of the lower side wall is provided with a second lower side wall temperature measuring hole extending along the radial direction, and the second lower side wall temperature measuring element is arranged in the second lower side wall temperature measuring hole.

Preferably, the radial distance between the end of the crown wall temperature measuring element facing the hole bottom of the crown wall temperature measuring hole and the outer wall surface of the crown wall is in the range of 5-15 mm; and/or the distance between the central axis of the first upper side wall heating element and the upper shoulder is within the range of 5-20 mm, and the distance between the central axis of the second upper side wall temperature measuring element and the outer wall surface of the upper opening is within the range of 5-20 mm; and/or the distance between the central axis of the first lower side wall heating element and the lower shoulder is within the range of 5-20 mm, and the distance between the central axis of the second lower side wall temperature measuring element and the outer wall surface of the lower sub-opening is within the range of 5-20 mm.

Also disclosed is a tire mold comprising an outer mold and a rigid inner mold assembly as above. And the outer mold structure may be an outer mold of a conventional structure in the art.

Also relates to a vulcanizing device, which comprises a tire mold, wherein the tire mold comprises the rigid inner mold assembly described above by the outer mold.

Drawings

The features and advantages of the present invention will become more apparent from the following non-limiting description of the preferred embodiments of the invention, as illustrated in the accompanying drawings. Wherein:

figure 1a shows a cross-sectional view of a vulcanisation apparatus according to the present invention.

Figure 1b shows a perspective view of the vulcanisation apparatus shown in figure 1.

Figure 2 shows a cross-sectional view of the rigid inner mold assembly in the tire mold of the curing apparatus of figure 1 with the rigid inner mold in a collapsed position.

Figure 3 shows a perspective view of the rigid inner die assembly with the first segments collapsed in place and the second segments not collapsed in place.

Figure 4a shows a first perspective view of a first section of the rigid inner mold.

FIG. 4b shows a perspective view of a particular configuration from a second perspective of the first section;

FIG. 4c shows a side view of the drum tile of the first segment of FIG. 4 b;

FIG. 4d shows a side view of the first section of FIG. 4 b;

fig. 4e shows a front view of the first section of fig. 4 b;

figure 5 shows a perspective view of a second section of the rigid inner mold.

Figure 6 shows a cross-sectional view of a connecting rod used in a rigid inner die assembly.

Figure 7 shows a front view of the first bracket in the rigid inner die assembly.

Figure 8 shows a perspective view of a second bracket in the rigid inner die assembly.

Fig. 9 shows a cross-sectional view of the inner mold of the tire mold.

Fig. 10 shows a perspective view of the vulcanisation apparatus in a collapsed position.

Fig. 11 shows a perspective view of the vulcanizing apparatus in which the outer mold is being opened.

Fig. 12a to 12d show perspective views of a curing apparatus in which a rigid inner mold is being opened, wherein the outer mold and tire that have been opened are omitted for clarity of illustration.

Fig. 13 is a perspective view showing the vulcanizing apparatus in a state where both the outer mold and the inner mold have been opened and the tire is removed.

Detailed Description

The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that only the preferred embodiment of the invention has been shown in the drawings and is not to be considered limiting of its scope. Obvious modifications, variations and equivalents will occur to those skilled in the art based on the embodiments shown in the drawings, and features described in the different embodiments can be combined arbitrarily, unless otherwise indicated or clearly contradicted by context. These are all within the scope of the present invention.

In the following disclosure, directional terms such as "axial", "radial", "circumferential", etc. are used with reference to the rigid inner mold. Where "axial" refers to a direction along the central axis of the rigid inner mold, "radial" refers to a direction perpendicular to the central axis, and "circumferential" refers to a direction around the central axis.

Fig. 1a shows a cross-sectional view of the vulcanizing device 1 of the present invention, and fig. 1b shows a perspective view of the vulcanizing device 1. As shown in fig. 1, the vulcanizing apparatus 1 mainly includes a rigid inner mold assembly 100, an outer mold 200, and a hot plate 300, wherein the rigid inner mold assembly 100 includes a rigid inner mold and a driving assembly for driving respective parts of the rigid inner mold, the outer mold 200 is disposed outside the rigid inner mold, and between the outer mold and the rigid inner mold is a space for accommodating a tire. The rigid inner mold assembly 100 and the outer mold 200 constitute the tire mold 10 of the curing apparatus 1. The vulcanizing apparatus 1 further includes a hot plate 300 on which the tire mold 10 is supported so that the tire in the tire mold 10 can be heated by the hot plate 300 during the vulcanization.

The drive assembly includes a first upper ring 131, a first lower ring 132, a second upper ring 135 and a second lower ring 136, which are driven by a drive portion (e.g., a cylinder, a hydraulic cylinder, etc.) included in the center mechanism, thereby driving the respective components of the rigid inner mold. This will be described in detail below.

< Structure of rigid inner mold >

Fig. 2 shows a cross-sectional view of the rigid inner mold assembly 100 in the tire mold 10 of the vulcanizing apparatus 1, and fig. 3 shows a perspective view of the rigid inner mold assembly 100, in which the respective sections of the rigid inner mold assembly 100 are shown in a collapsed state.

As shown in fig. 2 and 3, the rigid inner mold assembly 100 includes a plurality of first segments 110 and a plurality of second segments 120 that are circumferentially arranged. The number of the first segments 110 is preferably the same as that of the second segments 120, and the first segments 110 and the second segments 120 are switchable between a closed position and an expanded position, in which the first segments 110 and the second segments 120 are alternately arranged to form a complete ring-shaped portion, and in the closed position, the first segments 110 and the second segments 120 are separated, and the number of the first segments 110 and the number of the second segments 120 are at least 2, preferably 4-8, respectively. For example, the structure shown in the perspective view in fig. 3 includes 6 first segments 110 and 6 second segments 120.

The first and second sections 110, 120 are radially movable to switch between a collapsed state and an expanded state. Also, as shown in fig. 2 and 3, the first segment 110 may also be raised and lowered relative to the second segment 120 during the collapsing and expanding processes, thereby avoiding interference between the first segment 110 and the second segment 120 during the collapsing and expanding processes. When the first and second segments 110, 120 are expanded into position, the first and second segments 110, 120 will splice into a complete ring shape so that they can press against the inside of the tire, applying sufficient pressure to the tire, as will be described in more detail below.

Fig. 4a shows a perspective view of the first section 110, wherein the structure of the first section 110 is clearly shown. The body of the first segment 110 comprises a first drum tile 113, and the first drum tile 113 is fixedly connected to the first connecting seat 114, for example, detachably connected to the first connecting seat 114 by screws or the like, or may be fixedly connected to the first connecting seat 114 by welding or the like. The side surface 115 of the first drum tile gradually expands in a radially inward direction.

A first section fork 111 is provided on the first coupling seat 114, and the first section fork 111 is used for coupling a first link 133 to be disclosed below. At the bottom of the first connection seat 114, a first slider 112 is provided, which first slider 112 cooperates with a first guide rail 142, which will also be described in detail below.

A perspective view of the second section 120 is shown in fig. 5. It can be seen that the second segment 120 has a structure substantially similar to the first segment 110, and includes a second drum tile 123 and a second connecting seat 124 connected to the second drum tile 123, a second segment fork 121 is formed on the second connecting seat 124, and a second slider 122 is disposed at the bottom of the second connecting seat 124. Unlike the first drum tile 113, the side 125 of the second drum tile 123 is gradually contracted in a radially inward direction. This allows the first section 110 to be collapsed first and then the second section 120 to be collapsed during collapsing of the sections of the rigid inner mould.

Fig. 4b to 4e show a specific structure of the first section 110. This particular structure of the first segment 110 is also applicable to the second segment 120, and thus, only the first segment 110 will be described in detail herein, and a detailed description of the second segment 120 will not be repeated.

Fig. 4b shows a perspective view of the first segment 110, where it can be seen that a heating block 230 is arranged inside the first drum tile 113 for heating parts of the first drum tile 113. Referring further to FIG. 4c, a side view of the first drum tile 113 is shown. The first drum shoe 113 includes a crown wall 210 and upper and lower side walls 221 and 222 formed at both ends of the crown wall 210. An upper shoulder 211 is formed at a portion of an upper end of the crown wall 210 near the upper sidewall 221, and correspondingly, a lower shoulder 212 is formed at a portion of a lower end of the crown wall 210 near the lower sidewall 222. An upper sub-mouth portion 223 is formed at a position corresponding to a bead toe on one side of the tire (i.e., a tip end portion on the inner side of the bead) on the radially inner side of the upper sidewall 221, and a lower sub-mouth portion 224 is formed at a position corresponding to a bead toe on the other side of the tire on the radially inner side of the lower sidewall 222.

Returning to fig. 4b, in correspondence with the portions of the first drum tile 113 shown in fig. 4c, the heating block 230 is provided with: a crown wall heating unit 231 for heating the crown wall 210, an upper side wall heating unit 232 for heating the upper side wall 221 including the upper sub mouth portion 223, and a lower side wall heating unit 233 for heating the lower side wall 222 including the lower sub mouth portion 224.

The upper sidewall heating assembly 232 includes at least one heating element, preferably a plurality of heating elements, and more preferably 2-4 heating elements. As shown, for example, in fig. 4b, the upper sidewall heating assembly 232 includes a first upper sidewall heating element 232-1 and a second upper sidewall heating element 232-2. Wherein first upper sidewall heating element 232-1 is positioned proximate upper shoulder 211 of crown wall 210. The second upper sidewall heating element 232-2 is disposed radially inward of the first upper sidewall heating element 232-1 and is spaced a distance from the first upper sidewall heating element 232-1, preferably located adjacent the upper sub-aperture 223. Wherein a first upper sidewall heating element 232-1 located proximate to upper shoulder 211 may heat both crown wall 210 and upper sidewall 221, while a second upper sidewall heating element 232-2 primarily heats upper sidewall 221, particularly upper lip 223.

Preferably, the distance of the first upper sidewall heating element 232-1 and/or the second upper sidewall heating element 232-2 from the axial direction (Y) of the outer wall surface of the upper sidewall 221 of the first drum tile 113 is in the range of 15 to 70 mm.

Similar to the upper sidewall heating assembly 232, the lower sidewall heating assembly 233 also includes at least one heating element, preferably a plurality of heating elements, and more preferably 2-4 heating elements. Whereas in the configuration shown in fig. 4b, the lower sidewall heating assembly 233 comprises a first lower sidewall heating element 233-1 and a second lower sidewall heating element 233-2. Wherein the first lower sidewall heating element 233-1 is positioned proximate the lower shoulder 212 of the crown wall 210. The second lower sidewall heating element 233-2 is disposed radially X inside the first lower sidewall heating element 233-1 and is spaced a distance from the first lower sidewall heating element 233-1, preferably positioned proximate the lower sub-mouth 224. Wherein the first lower sidewall heating element 233-1, located proximate the lower shoulder 212, can heat both the lower sidewall 222 and the crown wall 210, while the second lower sidewall heating element 233-2 primarily heats the lower sidewall 222, and in particular the lower sub-mouth 224.

It is also preferable that the axial distance of the first lower sidewall heating element 233-1 and/or the second lower sidewall heating element 233-2 from the outer wall surface of the lower sidewall 222 of the first tile 113 is also within the range of 15 to 70 mm.

The crown wall heating assembly 231 includes at least one heating element, preferably 2-6 axially arranged heating elements. The radial distance of each heating element of the crown wall heating assembly 231 from the outer wall surface of the crown wall 210 is within the range of 10-60 mm.

In the present invention, each heating element of the crown wall heating unit 231, the upper sidewall heating unit 232 and the lower sidewall heating unit 233 may be an electric heating element or an induction heating element.

In one embodiment, a plurality of heating holes are formed in the heating block 230, and the heating elements described above, such as the heating element of the crown wall heating unit 231, the first upper sidewall heating element 232-1, the second upper sidewall heating element 232-2, the first lower sidewall heating element 233-1, the second lower sidewall heating element 233-2, etc., can be inserted into the heating holes, preferably, interference fit into the heating holes, so that the outer wall surfaces of the heating elements and the inner wall surfaces of the heating holes are closely attached to each other, thereby improving the heat transfer efficiency. The heating holes may extend in the circumferential direction Z or tangentially of the first drum tile 113 and preferably extend through the heating block 230. Specific forms of the heating element fitted in the heating hole may include a heating belt, a heating pipe, and the like.

Further, as shown in fig. 4b, the heating block 230 may be detachably mounted on the first drum tile 113. For example, the heating block 230 is detachably coupled to the first drum tile 113 at an outer side thereof by a coupling member such as a screw, and is detachably coupled to the first coupling seat 114 at an inner side thereof by a coupling member such as a screw, and an insulation board may be disposed between the heating block 230 and the first coupling seat 114 to reduce ineffective transfer of heat. Therefore, when tires of different specifications are vulcanized, only the drum tiles and/or the heating blocks need to be replaced, and the whole set of inner mold does not need to be replaced, so that the production cost is saved.

The first drum tile 113 is preferably made of steel or cast iron, and may be obtained by stamping or casting. The drum tile made of steel or cast iron has good wear resistance and high strength, and the service life of the inner die is ensured. The first connection seat 114 is also preferably made of steel or cast iron, which can be obtained by welding or casting processes. The first drum shoe 113 and/or the first connecting seat 114 made of steel or cast iron stabilizes the mold opening and closing process of the inner mold, and thus the service life of the inner mold can be extended. The outer side surface of the heating block 230 is tightly attached to the inner side surface of the first drum tile 113, and the attachment area is greater than 1/3 of the area of the inner side surface of the first drum tile 113, so that the first drum tile 113 is uniformly heated, and the heat transfer efficiency is improved; the heating block 230 may be made of steel, cast iron, aluminum alloy, or aluminum magnesium alloy, preferably aluminum alloy or aluminum magnesium alloy. The aluminum alloy or the aluminum-magnesium alloy contributes to reducing the weight of the inner mold, the heating block 230 made of the aluminum alloy or the aluminum-magnesium alloy has a large thermal expansion rate and good heat transfer performance, and the fit clearance between the heating block 230 and the inner wall of the first drum tile 113 can be eliminated through self expansion when the tire is vulcanized, so that heat can be transferred to the first drum tile 113 more efficiently.

Further, as shown in fig. 4b to 4e, a temperature measuring assembly is further disposed on the first drum tile 113 for detecting the temperature of the first drum tile 113, so as to control and regulate the heating of the first drum tile 113.

As shown in the figure, a crown wall temperature sensing assembly is disposed on the crown wall 210 and includes at least one crown wall temperature sensing element 241. In a specific structure, a crown wall temperature measuring hole is formed in the crown wall 210, and the crown wall temperature measuring element 241 is installed in the crown wall temperature measuring hole. The crown temperature sensing holes are preferably provided on the inside face of the crown wall 210 and extend generally radially. As shown more clearly in fig. 4b, the circumferential dimension of heating block 230 is slightly less than the circumferential dimension of crown wall 210, so that space for forming a crown wall temperature sensing hole can be formed on both sides of heating block 230. After installation, the radial distance Δ 1 between the end of the crown wall temperature sensing element 241 facing the bore bottom of the crown wall temperature sensing bore and the outer wall surface of the crown wall 210 is in the range of 5-15 mm. This distance range helps to bring the temperature detected by the crown wall temperature measuring element 241 closer to the temperature of the outer wall surface of the crown wall 210 and thus the temperature at the crown of the tire, thereby helping to improve the temperature control accuracy.

In other specific implementation structures, the crown temperature measuring holes for installing the crown temperature measuring element 241 can be arranged at other positions of the crown wall 210, for example, at two sides of the crown wall 210 along the circumferential direction, or at the central position of the inner side surface of the crown wall 210.

An upper sidewall temperature measuring unit 242 is provided on the upper sidewall 221 of the first drum shoe 113 to measure the temperature of the upper sidewall 221. Preferably, the upper sidewall temperature sensing assembly 242 includes a first upper sidewall temperature sensing element 242-1 and a second upper sidewall temperature sensing element 242-2. The side surface of the upper side wall 221 is provided with a first upper side wall temperature measuring hole for installing a first upper side wall temperature measuring element 242-1, the first upper side wall temperature measuring hole extends along the circumferential direction or the tangential direction approximately, the first upper side wall temperature measuring hole is communicated with a wire passing groove 225 arranged at the circumferential side part of the upper side wall 221, so that a power wire and/or a signal wire and the like can be connected to the first upper side wall temperature measuring element 242-1 through the wire passing groove 225, and the interference caused by the power wire and/or the signal wire when the inner mold assembly is opened and closed can be avoided. After installation, the distance Δ 2 between the central axis of the first upper sidewall heating element 232-1 and the upper shoulder 211 is in the range of 5 to 20 mm. Thus, the measured value of the first upper sidewall temperature sensing element 242-1 is ensured to be closer to the temperature at the outer wall surface of the crown wall 210, particularly the outer wall surface of the upper shoulder portion 211, thereby improving the accuracy of temperature control.

A second upper sidewall temperature measuring hole is formed in the inner peripheral side surface of the upper sidewall 221, and a second upper sidewall temperature measuring element 242-2 is mounted in the second upper sidewall temperature measuring hole. The second upper sidewall temperature sensing aperture extends generally radially. After installation, as shown in FIG. 4d, the distance Δ 3 between the central axis of the second upper sidewall temperature measuring element 242-2 and the outer wall surface of the upper sub pocket 223 is in the range of 5 to 20mm after installation. Thus, the temperature measured by the second upper sidewall temperature measuring element 242-2 is ensured to be closer to the temperature at the upper sidewall 221, particularly the outer wall surface of the upper sub-mouth 223 thereof, thereby improving the accuracy of temperature control.

The first upper sidewall temperature sensing element 242-1 and the second upper sidewall temperature sensing element 242-2 can also be located at other locations and are within the scope of the present invention. For example, a first upper sidewall temperature sensing element 242-1 and/or a second upper sidewall temperature sensing element 242-2 can be disposed on the inner side of the upper sidewall 221.

A lower sidewall thermometry assembly may also be provided on the lower sidewall 222. The construction and arrangement of the lower sidewall thermometric assembly may be the same as the upper sidewall thermometric assembly 242 and therefore will not be repeated here.

By respectively arranging the corresponding heating components and temperature measuring components at the crown wall 210, the upper side wall 221 and the lower side wall 222, the respective control of the heating at different parts of the first drum tile 113 can be realized, so that the temperature difference caused by the difference of different sizes, shapes and the like of the different parts of the first drum tile 113 can be eliminated by heating the first drum tile 113, the temperature uniformity of the first drum tile 113 in the heating process is ensured, and the quality of the vulcanization treatment of the tire is improved. For example, in the actual vulcanization process, the heat dissipation capacity at the upper sub-port 223 and the lower sub-port 224 is enhanced, and therefore, the power at the upper side wall heating unit 232 and the lower side wall heating unit 233 can be controlled to be slightly higher than that at other portions, and particularly, the power of the second upper side wall heating element 232-2 and the second lower side wall heating element 233-2 is set to be slightly higher.

Each temperature measuring element detects the temperature of the drum tiles in real time, and feeds the detected temperature value back to the control system so that the control system can adjust based on the temperature value, for example, after the control system receives the temperature feedback value, the temperature feedback value can be compared with a stored preset threshold value, the power of one or more heating elements in the drum tiles can be adjusted according to the comparison result, and therefore the temperature of the rigid inner mold can be uniformly increased, and the temperature is finally kept at the vulcanization temperature, and the tire vulcanization quality is improved.

A preferred manner of temperature control of the first drum tile 113 will be described in detail below.

During heating, the heating elements of the crown wall heating unit 231, the first upper side wall heating element 232-1 of the side wall heating unit 232 and the first lower side wall heating element 233-1 of the lower side wall heating unit 233, and the second upper side wall heating element 232-2 of the upper side wall heating unit 232 and the second lower side wall heating element 233-2 of the lower side wall heating unit 233 are controlled simultaneously. Meanwhile, the crown wall temperature is detected by the crown wall temperature measuring element 241, the temperature of the upper sub-mouth portion 223 is detected by the second upper side wall temperature measuring element 242-2, the temperature of the lower sub-mouth portion 224 is detected by the second lower side wall temperature measuring element, the detected temperatures are fed back to a control system (not shown), and the second upper side wall heating element 232-2 and the second lower side wall heating element 233-2 are regulated and controlled based on the detected temperatures. Similarly, the temperatures of the first upper sidewall heating element 232-1 and the first lower sidewall heating element 233-1 and the respective heating elements of the crown wall heating assembly 231 are detected and controlled. Thereby, the temperature is uniformly raised and finally maintained at the desired vulcanization temperature, for example 180 ℃.

Further specifically, a predetermined threshold value of the difference between the detected temperature value and the vulcanization temperature value may be set, for example 60 ℃. When the threshold value is reached and the detected temperature is lower than the vulcanization temperature, the controller controls the power of the heating element to be approximately reduced gradually, so that the temperature of the inner mold can be stably and uniformly increased and finally kept at the better vulcanization temperature. In addition, the temperature measured by each temperature measuring element can be compared to obtain the maximum temperature difference. When the maximum temperature difference reaches a preset threshold value, for example 5 ℃, the control system adjusts the corresponding heating element at the position where the temperature rises too fast, or adjusts the corresponding heating element at the position where the temperature rises too slowly, thereby achieving uniform temperature rise of the whole inner mold section.

The above description of the specific structure, temperature control process, etc. of the first section 110 is equally applicable to the second section 120. And further, the structure is also applicable to an inner die assembly including only one inner die segment structure.

The rigid internal mold assembly 100 provided by the embodiment comprises a plurality of sections, each section comprises a drum tile, the inner side of each drum tile is provided with a heating block 230, the heating block 230 is provided with a plurality of heating assemblies, and the heating assemblies are connected with a power supply to heat the rigid internal mold, so that the rigid internal mold assembly is safe, energy-saving and environment-friendly; the heat is transferred to the drum tiles through the heating block 230, and the heat is continuously diffused in the heat transfer process, so that the temperature of the drum tiles tends to be uniform finally; when the tire is vulcanized, the heating elements in all the areas can be controlled independently, and the heating elements at different positions can be operated at different powers, so that different heat is given to different positions. Furthermore, the temperature difference of the drum tiles caused by the difference of different positions, sizes, shapes and the like of the sections is eliminated through real-time detection, feedback adjustment and closed-loop control of the temperature measuring device, the drum tiles are ensured to be uniformly heated in the heating process, the drum tiles are finally kept at a better vulcanization temperature, and the tire vulcanization quality is improved.

Returning to fig. 2 and 3, the structure of the drive assembly of the rigid inner mold assembly 100 will be described in detail in conjunction with fig. 1a and 1 b.

As shown in fig. 1a, the drive assembly of the rigid inner die assembly 100 comprises a first upper ring 131, one end (e.g. the lower end in the figure) of which 131 is connected to at least one drive part in the central mechanism, and the other end (e.g. the upper end in the figure) of which is provided with a first connecting ring 134. The first link 133 is disposed between the first connection ring 134 and the first segment 110. Wherein one end of the first link 133 is hinged in the first section fork 111 of the first section 110, and the other end is hinged on the first connection ring 134.

The drive assembly of the rigid inner die assembly 100 further comprises a second upper ring 135, one end (e.g. the lower end in the figure) of which ring 135 is connected to at least one drive part in the central mechanism, and the other end (e.g. the upper end in the figure) of which ring 138 is provided with a second connecting ring. The second link 137 is disposed between the second connection ring 138 and the second segment fork 121 of the second segment 120. Wherein one end of the second link 137 is hinged in the second section fork 121 and the other end is hinged on the second connection ring 138.

By virtue of the above-described structure of the connection rings and the connection rods, each of the first and second segments 110 and 120 can be collapsed or expanded when the first and second upper rings 131 and 135 are driven to be raised or lowered.

The structures of the first link 133 and the second link 137 may be the same. Fig. 6 shows an exemplary structure of the first link 133 and the second link 137. Wherein, both ends of the first link 133 and/or the second link 137 are formed with connection holes.

Holes corresponding to the coupling holes on both ends of the first link 133 are formed on the fork portion on the first coupling ring 134 and the first section fork portion 111, respectively, and coupling pins pass through the holes on the first section fork portion 111 and the coupling holes on one end of the first link 133. The one end of the first link 133 is rotatable about the connecting pin to effect articulation between the one end of the first link 133 and the first section fork 111. The other connecting pin passes through a hole on the fork of the first connecting ring 134 and a connecting hole on the other end of the first link 133. The other end of the first link 133 is rotatable about the corresponding link pin, thereby accomplishing the hinge joint of the other end of the first link 133 on the first link ring 134.

Similarly, holes corresponding to the coupling holes on both ends of the second link 137 are formed on the fork portion on the second coupling ring 138 and the second section fork portion 121. The one end of the second link 137 is rotatable about the connecting pin by means of the connecting pin passing through the hole on the second section fork 121 and the connecting hole on the one end of the second link 137 to effect the hinge connection between the one end of the second link 137 and the second section fork 121. By passing through a hole on the fork of the second connection ring 138 and a connection hole on the other end of the second link 137. The other end of the second link 137 is rotatable about the corresponding connection pin, thereby accomplishing the hinge joint of the other end of the second link 137 on the second connection ring 138.

In a preferred embodiment, at least one of the first and second links 133 and 137 may be a telescopic link, such that the length of the link is adjustable. By adjusting the length of the connecting rod, the radial stroke of the respective first and second sections 110, 120 is adjusted. In this way, when replacing the first segment 110 and/or the second segment 120 according to tires of different specifications, by adjusting the length of the connecting rod, it is possible to adapt to the different radial strokes of the segments to be replaced. In addition, by the adjustable length connecting rod, the roundness of the inner ring composed of the first segment 110 and the second segment 120 after expansion can be adjusted during the process of assembling the rigid inner mold. Furthermore, after a period of operation, the components such as the connecting rods, connecting pins, etc. wear out, thereby affecting the roundness of the inner ring. And the roundness of the inner ring can be adjusted and recovered by adjusting the length of the connecting rod.

Also preferably, at least one end of at least one of the first and second links 133 and 137 may have a threaded portion on which a joint bearing may be coupled. The knuckle bearing may enable the first link 133 and/or the second link 137 to oscillate about at least one end thereof. Thus, through the swing, the self-locking of the rigid inner die can be avoided.

In a preferred construction, at least one of the first and second links 133 and 137 may include threaded portions at both ends thereof, thereby being in the form of a stud. Wherein, the thread directions of the two ends of the stud can be opposite. Further, the screw portions of the first and second connecting rods 133 and 137 may be external threads, and correspondingly, the joint bearings connected thereto are formed with internal threads; alternatively, the threaded portions on the first and second connecting rods 133, 137 may be internally threaded and correspondingly externally threaded on the spherical plain bearing.

The drive assembly further includes a first lower ring 132, one end (e.g., the lower end in the figures) of the first lower ring 132 being connected to at least one drive portion of the central mechanism and the other end (e.g., the upper end in the figures) being connected to one end of the first segment 110 (e.g., the lower end of the first segment 110 as shown in the figures). When the first lower ring 132 is driven to move up and down, the first sections 110 are driven to move up and down integrally.

The drive assembly also includes a second lower ring 136. Similarly to the first lower ring 132, one end (e.g., the lower end in the figure) of the second lower ring 136 is connected to at least one driving part in the center mechanism, and the other end (e.g., the upper end in the figure) is connected to one end (e.g., the lower end of the second section 120 in the figure) of the second section 120. When the second lower ring 136 is driven to ascend and descend, the rigid inner mold comprising the first section 110 and the second section 120 can be driven to ascend and descend integrally.

Still referring to fig. 1a, 1b, 2 and 3, in the preferred construction illustrated, a first bracket 140 and a second bracket 143 are included for carrying the first section 110 and the second section 120, respectively. Fig. 7 and 8 show the structures of the first and second brackets 141 and 143, respectively.

The first bracket 140 includes a support member having a lower end connected to the first lower ring 132 such that the first bracket 140 can be lifted and lowered as the first lower ring 132 is lifted and lowered. In the configuration shown in fig. 7, the support includes a plurality of support columns 141. At the upper end of each support post 141 is attached a cross arm 145 and at the lower end is attached to the same retaining ring that is attached to the first lower ring 132. A first guide rail 142 is provided on the cross arm 145, and the first guide rail 142 is engaged with the first slider 112 of the first segment 110, so as to guide the moving direction of each first segment 110 when the first segments 110 are folded and expanded. The gap between the adjacent supporting columns 141 allows the second connecting rod 137 to pass through, so that mutual interference does not occur when the first and second sections 110 and 120 are folded and expanded.

Preferably, as shown in fig. 7, a toggle plate 146 is further connected between the supporting column 141 and the cross arm 145 for enhancing the stability of the connection of the cross arm 145 on the supporting column 141.

In another embodiment, not shown, the bearing may also be in the form of a support cylinder. When the supporting member is in the form of a supporting cylinder, the outer wall of the supporting cylinder is provided with a plurality of notches for the second connecting rod 137 of the second section 120 to pass through so as to avoid the occurrence of mutual interference.

The lower end of the second bracket 143 is connected to the second lower ring 136, and as can be seen from fig. 1a and 1b, the second section 120 is supported on the second bracket 143. Fig. 8 shows a perspective view of the second bracket 143, and it can be seen that the second bracket 143 may be a plate, and a plurality of second guide rails 144 are disposed on the second bracket 143, and the second guide rails 144 cooperate with the second sliders 122 disposed on the corresponding second segments 120 to guide the moving direction of each second segment 120.

A locating portion is also preferably provided between each second rail 144 that helps precisely locate the corresponding first segment 110 between adjacent second segments 120. Or, in other words, the positioning portion may further help to maintain the relative position between the first segment 110 and the second segment 120 in the circumferential direction and the radial direction of the inner mold, thereby improving the mold clamping accuracy of the entire inner mold. In the preferred construction shown in fig. 8, the locating portion includes a receiving slot 147 formed between adjacent second rails 144, the width of the receiving slot 147 being greater than the width of the cross arm 145 of the first bracket 140 so that the cross arm 145 can be received in the receiving slot 147.

It is further preferable that a stopper 148, such as a tapered protrusion or the like shown in the drawing, is provided in the receiving groove 147, and a positioning hole, not shown, is provided on the side of the corresponding cross arm 145 facing the second bracket 143. When the cross arm 145 is received in the receiving slot 147, the stop member 148 cooperates with the locating hole in the cross arm 145 to further assist in locating the first bracket 140. An escape groove 149 is further provided in the receiving groove 147, and the toggle plate 146 of the first bracket 140 connected between the support post 141 and the cross arm 145 can be inserted into the escape groove 149, thereby helping to avoid interference between the first bracket 140 and the second bracket 143.

It should be noted that, in other embodiments, the receiving groove 147 may also have a positioning function, for example, the side walls of the receiving groove 147 gradually get closer to the bottom of the groove, and the receiving groove 147 may position the first bracket 140.

It will be appreciated by those skilled in the art that the arrangement of the stop member 148 and the locating hole may be reversed, i.e., the locating hole is provided in the receiving slot 147 and a member such as a tapered protrusion is provided on the side of the cross arm 145 facing the receiving slot 147, and is within the scope of the present invention.

In addition, as shown in fig. 8, at least one, and preferably a plurality of support plates 150 are also disposed in the receiving grooves 147. These support plates 150 are arranged with their upper end faces flush and are detachably mounted in the receiving grooves 147 by fasteners such as screws. By providing the support plate 150, the levelness of the cross arm 145 of the first bracket 140 can be improved. Specifically, the support plate 150 is provided to ensure that the first section 110 and the second section 120 are at the same level after the internal mold clamping, thereby improving the mold clamping accuracy. The provision of the retainer plate 150 makes it possible to reduce the requirement for the machining accuracy of the receiving grooves 147.

< tire mold >

Fig. 9 shows a cross-sectional view of the tire mold 10 of the present invention. The tire mold 10 includes an outer mold 200, the outer mold 200 including a guide ring 210, an upper cover 220, a base 230, an upper side plate 240, a lower side plate 250, and blocks 260. The rigid inner mold assembly 100 described above is disposed within the outer mold 200.

The components of the vulcanisation apparatus 1 for driving the segments of the inner dies of the rigid inner die assembly 100 will now be described with reference to figures 1a and 1 b.

As shown in fig. 1a, the central mechanism, which functions as a drive assembly, comprises a holder 160, which holder 160 is attached to a thermal plate 300. The inner side of the fixed base 160 is sleeved with a second lower ring 136. The second lower ring 136 has an upper end coupled to the second bracket 143 and a lower end coupled to a first coupling plate 151 (see fig. 1b), and a first driving part 161 fixed to the first coupling plate 151, the first driving part 161 for driving the second lower ring 136. The first driving part 161 may include an air cylinder, a hydraulic cylinder (e.g., an oil cylinder), and the like. In the preferred structure shown in the drawings, the first driving portion 161 includes 2 cylinders. Of course, the first driving portion 161 may also include other number of cylinders, such as 2-4 cylinders. Specifically, one end of the piston rod of each cylinder of the first driving portion 161 is connected to the fixing base 160. Along with the telescopic motion of the piston rod, the cylinder body of the oil cylinder, the second lower ring 136 and the whole internal mold assembly are driven to lift, and the whole central mechanism can lift along with the telescopic motion of the piston rod.

A second connecting plate 152 is fixedly connected to the underside of the first connecting plate 151 (or the side remote from the rigid inner mould), for example by means of a plurality of fixing rods. A second driving part 162, for example, 2 oil cylinders, is fixedly connected to a lower side of the second connection plate 152. The second driving part 162 is used to drive the first lower ring 132. Like the first driving part 161, the second driving part 162 may include other number of cylinders, such as 2-4 cylinders. The second driving unit 162 may be in other forms such as an air cylinder. Specifically, one end of the piston rod of each cylinder of the second driving portion 162 is connected to the first lower ring 132. Therefore, along with the extension and retraction of the piston rod, the first lower ring 132 is driven, and the first bracket 140 and the first section 110 are driven to ascend and descend. The fourth driving part 164 and the fourth connecting plate 154, which will be described below, are also lifted and lowered together.

On the underside of the second connecting plate 152, a third connecting plate 153 is provided, which third connecting plate 153 is connected, for example by fixing, to the second upper ring 135. A third driving unit 163 is fixedly connected to the third connecting plate 153, and the third driving unit 163 drives the third connecting plate 153 to move up and down, and further drives the second upper ring 135 to move up and down. Like the previous first and second driving parts 161 and 162, the third driving part 163 may also include a required number of cylinders, preferably 2 to 4 cylinders, and more preferably 2 cylinders. The second driving unit 162 may be another type of driving member such as an air cylinder. Specifically, one end of the piston rod of each cylinder of the third driving part 163 is connected to one of the first connection plate 151, the second connection plate 152, and the second lower ring 136. Along with the telescopic motion of the piston rod, the cylinder body of the oil cylinder, the third connecting plate 153 and the second upper ring 135 are driven to lift.

A fourth connecting plate 154 is disposed under the third connecting plate 153, and the fourth connecting plate 154 is fixedly connected to the first lower ring 132 by a fixing rod or the like, wherein one end of the fixing rod is connected to the fourth connecting plate 154, and the other end of the fixing rod passes through the third connecting plate 153 and the second connecting plate 152 and is connected to the first lower ring 132. A fourth driving portion 164 is fixedly connected to the fourth link plate 154, and the fourth driving portion 164 drives the first upper ring 131. The fourth driving part 164 may also be in the form of a cylinder, etc., similar to the first to third driving parts 163, and the fourth driving part 164 may include a required number of cylinders, etc. Preferably, the fourth driving part 164 includes 1 to 2 oil cylinders, and more preferably 1 oil cylinder. Specifically, one end of the piston rod of the fourth driving part 164 is connected to the first upper ring 131. Along with the telescopic motion of the piston rod, the first upper ring 131 is driven to lift.

< principles of operation >

The operation principle of the vulcanizing apparatus 1, particularly the rigid inner mold assembly 100 therein, will be explained below by describing the mold opening and closing process of the vulcanizing apparatus 1 of the present invention with reference to fig. 10 to 13.

The vulcanizing apparatus 1 shown in fig. 10 is in a mold closed state. When the vulcanizing device 1 is to be opened, the outer mold 200 is first opened. As shown in fig. 11, the guide ring 210 is raised such that the blocks 260 are moved radially outward. Then, the entire outer mold 200 is lifted up to a predetermined height along with the guide ring 210, and separated from the inner mold.

Next, the inner mold is opened as shown in fig. 12a to 12 d. As shown in fig. 12 a. The second lower ring 136 is driven to rise, so that the rigid inner mold integrally rises to a preset height. Subsequently, the first upper ring 131 is lifted, and the first segments 110 are driven by the first connecting rods 133 to be folded radially inward, as shown in fig. 12 b. After the first section 110 is folded to the proper position, the first lower ring 132 is driven to ascend, and the first section 110 is driven to ascend to the predetermined position above the second section 120 as a whole, as shown in fig. 12 c. Then, the second upper ring 135 is driven to rise, and the second section 120 is driven to fold in the radial inward direction by the second connecting rod 137, as shown in fig. 12 d.

Finally, as shown in fig. 13, the tire 2 may be removed from the tire mold 10.

The mold clamping of the tire mold 10 can be achieved by performing the reverse operation to the above-described process.

< other modifications >

The preferred structure of the present invention has been described above. It will be apparent to those skilled in the art that obvious variations and modifications can be made on the above preferred embodiment, which is also within the scope of the invention.

For example, in the particular configuration depicted, guide rails are provided on the first and second brackets 140 and 143, respectively, and corresponding sliders are provided on the corresponding first and second sections 110 and 120. However, it will be appreciated by those skilled in the art that the positions of the guide rails and the slide blocks may be interchanged. That is, grooves are provided on the first and second brackets 140 and 143, and guide rails are provided at the bottoms of the first and second sections 110 and 120. In the specific structure shown in the figures, each guide rail is a guide rail with an i-shaped cross section, and correspondingly, a sliding groove with an i-shaped cross section is formed on the sliding block. Alternatively, other forms are possible, for example, in another guide assembly embodiment, a slide slot with a T-shaped cross section may be provided on the first bracket 140 and the second bracket 143, and a slide block with a T-shaped cross section may be provided on the first section 110 and the second section 120.

In the particular arrangement described above, the rigid inner die assembly 100 includes a first segment 110 and a second segment 120 therein. On the basis of this, a person skilled in the art can additionally provide a third section, a fourth section, etc. according to actual needs, which is not beyond the scope of the invention.

In the specific structure described above, the first to fourth connecting plates 151 to 154 are provided for connecting the first to fourth driving parts 161 to 164. Only one connecting plate can be arranged for connecting each driving part, or other numbers of connecting plates can be arranged according to actual needs. The first and second links 133 and 137 are shown hinged to the first and second segments 110 and 120 and the first and second connection rings 134 and 138 by a connection hole-connection pin structure, although other forms of hinge structures, such as a ball and socket connection, may be used.

The first segment 110 and the second segment 120 may be assembled together by fastening members such as screws, or may be fixed together by welding, or may be integrally formed.

For the first to fourth driving portions 161 to 164 of the driving assembly, other types of driving means, such as electric driving (with or without a gear train) and the like, may be used in addition to the above-mentioned air cylinder, hydraulic cylinder (e.g., oil cylinder), and the like. Accordingly, the above-mentioned connecting plates for connecting the drives may also be in other numbers depending on the type of drive, or even no connecting plates or the like may be provided.

For the inner mold sections of the first section 110 and the second section 120, etc., the crown wall temperature measuring element 241, the upper sidewall temperature measuring component 242 and the lower sidewall temperature measuring component described above may be provided on all the inner mold sections, thereby achieving overall temperature detection of each tile to more accurately control the vulcanization process. However, it will be appreciated that to further simplify the cure control process, at least one of the upper and/or lower sidewall and/or crown wall temperature sensing assemblies may be provided on at least one inner mold section of each section, while at least one other inner mold section (which may be of the same type as the inner mold section described above) is provided with at least one other of the upper and/or lower sidewall and/or crown wall temperature sensing assemblies. In other words, a plurality of temperature measurement components can be dispersedly arranged on a plurality of sections, and at least one section can be selected from each section to be provided with all the temperature measurement components, so that the relatively comprehensive temperature detection and the accurate regulation and control of the rigid internal mold can be realized. The number and specific form of the temperature sensing elements in each temperature sensing assembly can also be designed based on the actual circumstances, such as the specific shape and configuration of the drum tile.

As another example, several curing tests may be performed and the relationship between heat transfer at each location of the drum tile may then be developed. Thus, at least one temperature measuring element can be retained on the inner mold assembly, and the heating process can be regulated and controlled according to the heat transfer relationship among the relevant positions. Alternatively, after a plurality of vulcanization tests are performed, the vulcanization process may be cured and the vulcanization process may be performed directly according to a fixed vulcanization procedure.

Claims (10)

1. A rigid inner mold assembly, comprising:

a rigid inner mold comprising a plurality of inner mold sections, the inner mold sections comprising drum tiles, the drum tiles comprising a crown wall and upper and lower sidewalls formed at both ends of the crown wall;

wherein, the inner mould section includes the heating piece, the heating piece is provided with: a crown wall heating assembly located at a position corresponding to the crown wall to heat the crown wall; an upper sidewall heating assembly located at a position corresponding to the upper sidewall to heat the upper sidewall; and the lower side wall heating component is positioned at a position corresponding to the lower side wall so as to heat the lower side wall.

2. The rigid inner mold assembly according to claim 1, wherein the crown wall heating assembly comprises at least one crown wall heating element, a circumferentially or tangentially extending crown wall heating hole being formed on the heating block, the crown wall heating element being mounted in the corresponding crown wall heating hole; and/or

The upper side wall heating assembly comprises at least one upper side wall heating element, upper side wall heating holes extending along the circumferential direction or the tangential direction are formed on the heating block, and the upper side wall heating element is installed in the corresponding upper side wall heating hole; and/or

The lower side wall heating assembly comprises at least one lower side wall heating element, lower side wall heating holes extending along the circumferential direction or the tangential direction are formed on the heating block, and the lower side wall heating element is installed in the corresponding lower side wall heating hole.

3. The rigid inner mold assembly according to claim 2, wherein an upper shoulder portion is formed at a portion of an upper end of the crown wall adjacent to the upper sidewall, and a lower shoulder portion is formed at a portion of a lower end of the crown wall adjacent to the lower sidewall, an upper sub-mouth portion is formed at a position on a radially inner side of the upper sidewall corresponding to one side toe of the tire, and a lower sub-mouth portion is formed at a position on a radially inner side of the lower sidewall corresponding to the other side toe of the tire;

wherein the upper sidewall heating assembly comprises: a first upper sidewall heating element positioned proximate to the upper shoulder; and a second upper side wall heating element located radially inwardly of the first upper side wall heating element and adjacent the upper sub-mouth; and/or

The lower sidewall heating assembly includes: a first lower sidewall heating element positioned proximate to the lower shoulder; and a second lower sidewall heating element located radially inwardly spaced from the first lower sidewall heating element and proximate the lower sub-mouth.

4. A rigid inner mould assembly according to claim 3, wherein the axial distance of the first and/or second upper side wall heating elements from the outer wall surface of the upper side wall is in the range of 15 to 70 mm; and/or

The axial distance between the first lower side wall heating element and/or the second lower side wall heating element and the outer wall surface of the lower side wall is within the range of 15-70 mm; and/or

The radial distance between the crown wall heating element of the crown wall heating component and the outer wall surface of the crown wall is within the range of 10-60 mm.

5. A rigid inner mould assembly according to claim 1, wherein the inner mould sections are switchable between a collapsed position and an expanded position;

the inner die assembly further includes a drive assembly that drives the inner die segments between a collapsed position and an expanded position.

6. A rigid inner mould assembly according to claim 1, wherein the heating block is removably attached to the drum tile on its outside and the heating block is removably attached to the attachment socket on its inside; and/or

1/3, wherein the outer side surface of the heating block is tightly attached to the inner side surface of the drum tile, and the attachment area is larger than the area of the inner side surface of the drum tile; and/or

The drum tile is made of steel or cast iron materials, and the heating block is made of aluminum alloy or aluminum magnesium alloy materials.

7. A rigid inner mould assembly according to any one of claims 1 to 6, further comprising a temperature measurement device comprising at least one of: the crown wall temperature measuring component is arranged on the crown wall and comprises at least one crown wall temperature measuring element; the upper side wall temperature measuring component is arranged on the upper side wall and comprises at least one upper side wall temperature measuring element; and the lower side wall temperature measuring component is arranged on the lower side wall and comprises at least one lower side wall temperature measuring element.

8. A rigid inner mould assembly according to claim 3 or 4, further comprising a temperature measuring device comprising at least one of the following: the crown wall temperature measuring component is arranged on the crown wall and comprises at least one crown wall temperature measuring element; the upper side wall temperature measuring component is arranged on the upper side wall and comprises at least one upper side wall temperature measuring element; the lower side wall temperature measuring component is arranged on the lower side wall and comprises at least one lower side wall temperature measuring element;

the crown wall is provided with at least one crown wall temperature measuring hole extending along the radial direction, and the crown wall temperature measuring element is arranged in the crown wall temperature measuring hole; and/or

The upper side wall temperature measuring component comprises a first upper side wall temperature measuring element and a second upper side wall temperature measuring element, a first upper side wall temperature measuring hole extending along the circumferential direction or the tangential direction of the upper side wall is formed in the circumferential side surface of the upper side wall, and the first upper side wall temperature measuring element is installed in the first upper side wall temperature measuring hole; and/or

A second upper side wall temperature measuring hole extending along the radial direction is formed in the inner peripheral side face of the upper side wall, and the second upper side wall temperature measuring element is installed in the second upper side wall temperature measuring hole; and/or

The lower side wall temperature measuring component comprises a first lower side wall temperature measuring element and a second lower side wall temperature measuring element, a first lower side wall temperature measuring hole extending along the circumferential direction or the tangential direction of the lower side wall is formed in the circumferential side surface of the lower side wall, and the first lower side wall temperature measuring element is installed in the first lower side wall temperature measuring hole; and/or

And a second lower side wall temperature measuring hole extending along the radial direction is formed in the inner peripheral side surface of the lower side wall, and the second lower side wall temperature measuring element is installed in the second lower side wall temperature measuring hole.

9. A rigid inner mould assembly according to claim 8, wherein the radial distance between the end of the crown wall temperature sensing element facing the bore bottom of the crown wall temperature sensing bore and the outer wall surface of the crown wall is in the range 5-15 mm; and/or

The distance between the central axis of the first upper side wall heating element and the upper shoulder is in the range of 5-20 mm; and/or

The distance between the central axis of the second upper side wall temperature measuring element and the outer wall surface of the upper seam allowance part is within the range of 5-20 mm; and/or

The distance between the central axis of the first lower side wall heating element and the lower shoulder is within the range of 5-20 mm; and/or

The distance between the central axis of the second lower side wall temperature measuring element and the outer wall surface of the lower sub-opening part is within the range of 5-20 mm.

10. A vulcanisation apparatus comprising a tyre mould comprising an outer mould and a rigid inner mould assembly according to claims 1-9.

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