CN106863666B

CN106863666B - Rigid internal mold of tire vulcanizer

Info

Publication number: CN106863666B
Application number: CN201710242416.8A
Authority: CN
Inventors: 孙贺; 张修洋; 刘培华; 殷晓; 徐楠楠
Original assignee: Qingdao Hailang Intelligent Equipment Co ltd
Current assignee: Qingdao Hailang Intelligent Equipment Co ltd
Priority date: 2017-04-13
Filing date: 2017-04-13
Publication date: 2022-11-08
Anticipated expiration: 2037-04-13
Also published as: CN106863666A

Abstract

The application discloses tire vulcanizer rigidity centre form relates to tire curing equipment field, and vulcanization pressure is big, and the breathing degree is high, is applicable to the tire of all models, is showing improvement vulcanization efficiency. The rigid inner mold of the tire vulcanizer comprises an expansion and contraction device and a transmission device for driving the expansion and contraction device, wherein the expansion and contraction device comprises a bag barrel which is used for shaping a tire after expansion, the bag barrel is formed by alternately splicing a first inner mold tile block and a second inner mold tile block, a sleeve shaft assembly connected with the transmission device is arranged in the center of the bag barrel, the sleeve shaft assembly comprises a central shaft and an outer shaft, the central shaft is positioned at the center, the outer shaft is sleeved outside the central shaft, a plurality of first fixing plates which penetrate through the outer shaft and correspond to the first inner mold tile block are arranged in the circumferential direction of the central shaft, and a plurality of second fixing plates which correspond to the second inner mold tile block are arranged in the circumferential direction of the outer shaft; the one end that sleeve axle subassembly was kept away from to first fixed plate and second fixed plate all is provided with the arch, the bellied draw-in groove of the equal fixedly connected with joint of first centre form tiling and second centre form tiling.

Description

Rigid internal mold of tire vulcanizer

Technical Field

The present application relates generally to the field of tire curing equipment, and more particularly to a tire curing press, and more particularly to a rigid inner mold for a tire curing press.

Background

In the traditional tire vulcanization process, the inner mold mostly adopts the mode of filling nitrogen and high-temperature steam into the capsule to carry out vulcanization and shaping on the tire, and the capsule vulcanization process still has certain defects.

Firstly, the temperature is provided by steam, the pressure is provided by nitrogen, the steam generates condensed water when meeting cold, so that the temperature distribution in the bladder is not uniform, the condensed water is not discharged in time, the temperature difference between the upper chuck and the lower chuck is large, and the tire vulcanization quality is reduced; secondly, the bladder can expand incompletely or expand asymmetrically due to reasons such as viscose, unreasonable size design and the like in the using process, so that the quality of each part of the finished tire is uneven; and thirdly, the blank is affected by the processing precision and the forming precision of the semi-finished rubber part to cause the uneven mass distribution, the vulcanizing capsule belongs to a soft body, the pressure provided by the vulcanizing capsule is lower, the rubber material cannot be forced to be evenly distributed again in a molten state through the vulcanizing effect, the uneven mass seriously affects the dynamic balance and the uniformity of the tire, and therefore the performance of the tire is greatly reduced. In addition, the capsules belong to consumable parts, and one capsule can only vulcanize about 260 tires on average, so the use cost is high.

The steam/nitrogen vulcanization technology developed in recent years based on the principle of constant pressure and temperature change still cannot solve the problem of large temperature difference of the bladder, although a rigid inner mold is gradually disclosed in recent years, the rigid inner mold and a central mechanism act together, the floor area is large, the size of the rigid inner mold cannot be adapted to all tires, and the vulcanization efficiency of the tires is influenced due to frequent replacement of the rigid inner mold for different tire models.

Disclosure of Invention

In view of the defects or shortcomings in the prior art, the rigid inner mold of the tire vulcanizer is expected to be provided to replace a vulcanizing bladder, so that the problems of incomplete bladder expansion, asymmetric structure, large temperature difference and the like in the prior art are fundamentally overcome, the vulcanizing pressure is large, the expansion and contraction degree is high, the rigid inner mold is suitable for tires of all models, and the vulcanizing efficiency is remarkably improved.

The rigid internal mold of the tire vulcanizer comprises an expansion and contraction device and a transmission device for driving the expansion and contraction device, wherein the expansion and contraction device comprises a bag barrel which is used for shaping a tire after expansion, the bag barrel is formed by alternately splicing a first internal mold tile block and a second internal mold tile block, a sleeve shaft assembly connected with the transmission device is arranged in the center of the bag barrel, the sleeve shaft assembly comprises a central shaft and an external shaft sleeved outside the central shaft, a plurality of first fixing plates which penetrate through the external shaft and correspond to the first internal mold tile block are arranged in the circumferential direction of the central shaft, and a plurality of second fixing plates which correspond to the second internal mold tile block are arranged in the circumferential direction of the external shaft; the one end that sleeve axle subassembly was kept away from to first fixed plate and second fixed plate all is provided with the arch, the bellied draw-in groove of the equal fixedly connected with joint of first centre form tiling and second centre form tiling.

First fixed plate and second fixed plate are right triangle, and right triangle's a right-angle side sets up in dabber or outer epaxial and length equals a bag section of thick bamboo height, and right triangle's another right-angle side perpendicular to dabber and outer axle set up in a bag section of thick bamboo top and length equals a bag section of thick bamboo top internal diameter, and right triangle's hypotenuse edgewise both sides all are provided with the arch.

And a locking assembly is arranged at the bottom of the first fixing plate corresponding to the first inner die tile block.

The bottom of the bag barrel is provided with a guide rail disc, and the surface of the guide rail disc is provided with a radial guide rail for limiting the first inner die pad and the second inner die pad to move radially.

The transmission device is a driving servo motor.

The longitudinal outer contour curves of the first inner die pad and the second inner die pad are consistent with the inner contour curve of the tire, the transverse outer contour lines of the first inner die pad and the second inner die pad form a circle, and the outer diameter of the circle is equal to the inner diameter of the tire.

And an electromagnetic heating device is arranged on the outer die matched with the rigid inner die for tire vulcanization molding.

The first inner die tile and the second inner die tile are made of steel, and a thermocouple is arranged inside the bag barrel.

According to the technical solution provided by the embodiment of the present application,

(1) The rigid capsule barrel is used for replacing a flexible capsule, no media such as steam, nitrogen and the like exist, the capsule does not need to be replaced regularly, a steam pipeline of a vulcanizing machine and the like are eliminated, and a series of equipment cost is obviously reduced;

(2) The inner die driven by machinery shrinks the capsule barrel in a lifting mode, expands the capsule barrel in a descending mode in sequence, overcomes the problems of incomplete expansion of the capsule, asymmetric structure and the like, simultaneously provides a pressure 40-50% higher than that of capsule vulcanization, can effectively change the distribution of rubber materials in a molten state, has uniform vulcanization temperature, controllable temperature and various parts and balanced vulcanization pressure, and thus obviously improves the vulcanization quality;

(3) The rigid inner mold is contracted twice through the first inner mold tile and the second inner mold tile, the first inner mold tile is lifted to provide a space for the contraction of the second inner mold tile after being contracted, the contraction range of the bladder is large, and the vulcanization requirements of tires of all specifications on the market can be met to the maximum extent;

(4) The rigid inner mold has no dry/wet circulation, no steps of vacuumizing and the like, the temperature is quickly increased, the temperature is stable, and the vulcanization efficiency of the tire is obviously improved.

Furthermore, according to some embodiments of the present application, the central mechanism of the present application may be replaced with a motor, which reduces the construction cost of the hydraulic pipeline, reduces the floor space, and the power system is easy to install and maintain, and the cost is significantly reduced; in addition, the rigid inner mold disclosed by the invention is stable in structure, not easy to damage and free from frequent replacement, the vulcanization efficiency is obviously improved, and the cost of the inner mold is reduced.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIGS. 1-4 are perspective, plan, front and cross-sectional views of a bladder according to an embodiment of the present invention;

fig. 5 to 8 are schematic views of a one-time contraction structure of a capsule tube according to an embodiment of the present invention;

fig. 9 to 12 are schematic views illustrating a lifting structure of a capsule according to an embodiment of the present invention;

FIGS. 13 to 17 are schematic views showing a secondary contraction structure of a cartridge according to an embodiment of the present invention;

FIG. 18 is a schematic view of the fitting of the rigid inner mold and the rigid outer mold of the vulcanizer of the present invention;

wherein, 1-a bag barrel, 11-a first inner die pad, 12-a second inner die pad, 2-a sleeve shaft assembly, 21-a mandrel; 22-an outer shaft; 3-a first fixing plate; 4-a second fixing plate; 5-bulge; 6-a clamping groove; 7-a locking assembly; 8-a guide rail disc; 9-guide rail.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the transverse direction is the horizontal direction in fig. 1-4, and the longitudinal direction is the vertical direction in fig. 1; the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the positional relationships shown in fig. 1, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 17, the rigid inner mold of the tire vulcanizer of the present invention includes an expansion device and a transmission device for driving the expansion device, the expansion device includes a bladder tube 1 for shaping a tire after expansion, the bladder tube 1 is formed by alternately splicing a first inner mold shoe 11 and a second inner mold shoe 12, a sleeve shaft assembly 2 connected to the transmission device is disposed in the center of the bladder tube, the sleeve shaft assembly 2 includes a central spindle 21 and an outer spindle 22 sleeved outside the spindle, the spindle 21 is circumferentially provided with a plurality of first fixing plates 3 corresponding to the first inner mold shoe 11 and penetrating through the outer spindle 22, and the outer spindle 22 is circumferentially provided with a plurality of second fixing plates 4 corresponding to the second inner mold shoe 12; the one end that sleeve axle subassembly 2 was kept away from to first fixed plate 3 and second fixed plate 4 is provided with arch 5, the bellied draw-in groove 6 of the equal fixedly connected with joint of first centre form tiling 11 and second centre form tiling 12.

In the rigid internal mold, the transmission device drives the sleeve shaft assembly 2 to ascend or descend, the mandrel 21 and the outer shaft 22 ascend and descend respectively to drive the first fixing plate 3 and the second fixing plate 4 to ascend and descend respectively, and the first internal mold tile block 11 and the second internal mold tile block 12 respectively contract and expand in the longitudinal direction respectively, so that a capsule is replaced to realize vulcanization molding of a tire, and the mechanical lifting type molding internal mold has higher vulcanization pressure than the traditional capsule, uniform temperature and no temperature difference problem; meanwhile, power is convenient to provide, a central mechanism is not needed, the expansion and shrinkage of the whole inner die can be realized through a transmission device, the use is convenient, and a larger space is provided for shrinkage by a lifting mode, so that the rigid inner die disclosed by the invention is high in shrinkage degree, and the cost is reduced.

Referring to fig. 1 to 17, as a preferred embodiment, the first fixing plate 3 and the second fixing plate 4 are both right triangles, one right-angled side of each right triangle is disposed on the spindle 21 or the outer shaft 22 and has a length equal to the height of the capsule 1, the other right-angled side of each right triangle is perpendicular to the spindle 21 and the outer shaft 22 and is disposed at the top of the capsule 1 and has a length equal to the inner diameter of the top of the capsule 1, and the inclined side of each right triangle is provided with the protrusions 5 along both sides of the edge. The setting of arch 5 can be so that when dabber 21 or outer axle 22 rose, thereby draw-in groove 6 slided the process that the other end realized contracting from the one end of arch 5, accomplishes the inflation process when descending in the same way, and draw-in groove 6 makes the slip shrink inflation fast with protruding 5's cooperation, and is efficient, with low costs.

Referring to fig. 1 to 17, a locking assembly 7 is disposed at the bottom of the first fixing plate 3 corresponding to the first inner die shoe 11. Locking Assembly 7's setting can be so that draw-in groove 6 can lock fixedly when sliding to first fixed plate 3 bottom, does benefit to on the next step transmission drive dabber and continues to rise and promotes whole bag section of thick bamboo 1 with whole first centre mould tiling 11 of shrink, vacates the space for the shrink of second centre mould tiling, and specific shrink space can refer to figure 3. It will be appreciated that other components that perform this function may be used, such as a baffle or the like, for the purpose of blocking the card slot at the bottom of the first retaining plate 3.

Referring to fig. 1 to 17, as a preferred embodiment, the bottom of the capsule 1 is provided with a guide rail disc 8, and the surface of the guide rail disc 8 is provided with a radial guide rail 9 for limiting the radial movement of the first inner die pad 11 and the second inner die pad 12. Above-mentioned setting can be on the basis of aforementioned structure further optimize the shrink and the inflation of a bag section of thick bamboo, prevents that first centre form tiling 11 and second centre form tiling 12 from appearing the displacement at shrink and inflation in-process, causes the deviation of shrink and inflation, and the guide rail has restricted the movement track of above-mentioned first centre form tiling 11 and second centre form tiling 12, has guaranteed that whole shrink or inflation process's accuracy, go on smoothly.

As a preferred embodiment, referring to fig. 1-4, the quill assembly 2 is connected to a transmission. In practical applications, the transmission device may be any mechanical device that can drive the rotating shaft to rotate, and specifically, the transmission device is a driving servo motor. The arrangement of the rotating shaft and the electric driving mode such as motor driving completely replaces a central mechanism, so that the occupied area of the whole vulcanizing machine can be reduced, meanwhile, the central mechanism is not adopted, the construction of a hydraulic pipeline of the central mechanism is reduced, and the construction cost is reduced; in addition, the complex central mechanism is difficult to install and maintain, the transmission device can be common power equipment for providing power in the field, can be installed and maintained at any time, is convenient to use, and has obviously reduced cost.

In the vulcanization and shaping process of the tire, for various types of tires, the longitudinal outer contour curves of the first inner die pad 11 and the second inner die pad 12 are consistent with the inner contour curve of the tire, the transverse outer contour lines of the first inner die pad 11 and the second inner die pad 12 form a circle, and the outer diameter of the circle is equal to the inner diameter of the tire. Therefore, the complete matching of the whole inner mold and the tire can be ensured, the vulcanization efficiency is improved, and the effect matched with the expansion size of the bladder is realized. Specifically, in the practical application process, the sizes of the first inner die shoe 11 and the second inner die shoe 12 may be equal or different, and the matching can form a bag barrel, and as a preferred embodiment, when the sizes of the first inner die shoe 11 and the second inner die shoe 12 are different, the size of the first inner die shoe 11 which is first contracted and lifted is smaller than that of the second inner die shoe 12, so that the lifting is convenient.

During the actual vulcanisation of the tyre, the external mold fitted with said rigid internal mold is provided with electromagnetic heating means, see figure 18. The two are matched without a capsule, a steam pipeline and a nitrogen route, the problem of the temperature difference inside the capsule in the traditional vulcanizing machine is completely solved, the whole steel inner die is uniformly heated, the vulcanizing quality is good, the vulcanizing efficiency is high, the energy-saving and emission-reducing performance is good, and the manufacturing cost of the whole equipment is reduced.

In order to guarantee the heated effect and the real-time regulation and control of the temperature in the vulcanization process, the inner die tile block is made of steel, a thermocouple is arranged in the bladder cylinder, the thermocouple monitors the vulcanization temperature in real time when the bladder cylinder provides the set internal pressure, and the vulcanization temperature is regulated through PLC control.

The working process of the rigid inner mold of the tire vulcanizer of the present invention is as follows:

referring to fig. 5 to 17, after a tire is put in, under the expansion state of the expansion and contraction device, the first inner mold tile 11 and the second inner mold tile 12 are alternately spliced into a bladder, the bladder is supported inside the tire, the electromagnetic heating device starts heating and vulcanizing to perform vulcanization and shaping of the tire, after the tire vulcanization process is finished, the transmission device drives the mandrel 21 to ascend, the corresponding first fixing plate 3 also ascends, and the clamping groove 6 slides to the bottom of the first fixing plate 3 along the protrusion 5 to complete the contraction and in-place process of the first inner mold tile 11; after the locking device 7 locks, the transmission device continues to drive the mandrel 21 to ascend, so that the whole contracted inner die tile block is integrally lifted by a certain height, preferably, the lifted height is the height of one bag barrel; the transmission device drives the outer shaft 22 to rise, the corresponding second fixing plate 4 also rises, and the clamping groove 6 slides to the bottom of the second fixing plate 4 along the protrusion 5 to complete the process of retracting the second inner die pad 12 in place. The first inner die shoe 11 and the second inner die shoe 12 move to the limit under the restriction of the bottom guide rail 9, and then the contraction of the capsule 1 can be completed.

After shrinkage, taking out the tire and entering the next working procedure; when a new tire to be vulcanized enters, the transmission device drives the outer shaft 22 to descend, the corresponding second fixing plate 4 descends, and the clamping groove 6 slides to the top end of the protrusion 5, so that the expansion in-place process of the second inner die shoe 12 is realized; the transmission device continues to drive the mandrel 21 to descend, the first inner die pad 11 is placed into the cavity formed after the second inner die pad 12 expands, the transmission device continues to drive the mandrel 21 to further descend, the corresponding first fixing plate 3 also descends, the clamping groove 6 slides to the top end of the protrusion 5, and the expansion in place process of the first inner die pad 11 is achieved. The first inner die pad 11 and the second inner die pad 12 move to the limit under the restriction of the bottom guide rail to form an expanded bladder tube, and then the expansion process of the bladder tube can be completed to perform vulcanization of the tire, and the process is repeated.

From the above working principle, when the inner die shrinks, the expansion ratio of the inner die can reach 1.43 because the first inner die shoe 11 and the second inner die shoe 12 are stacked up and down. During expansion, the second inner die pad 12 moves in place first, and the first inner die pad 11 is expanded radially after descending in place. The second inner die pad 12 and the first inner die pad 11 move to the limit to form a closed integral tire inner molding, and the pressure molding and vulcanization of the tire are realized. Compared with the existing rigid internal mold, the whole shrinkage process has higher shrinkage/expansion degree, can meet the vulcanization requirements of tires with various specifications on the market, and has high shrinkage/expansion efficiency and low cost.

The foregoing description is only exemplary of the preferred embodiments of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The rigid inner mold of the tire vulcanizer comprises an expansion device and a transmission device for driving the expansion device, and is characterized in that the expansion device comprises a bag barrel (1) which is used for shaping a tire after expansion, the bag barrel (1) is formed by alternately splicing a first inner mold tile block (11) and a second inner mold tile block (12), a sleeve shaft assembly (2) connected with the transmission device is arranged in the center of the bag barrel (1), the sleeve shaft assembly (2) comprises a central shaft (21) and an outer shaft (22) sleeved outside the central shaft (21), a plurality of first fixing plates (3) which penetrate through the outer shaft (22) and correspond to the first inner mold tile block (11) are arranged in the circumferential direction of the central shaft (21), and a plurality of second fixing plates (4) which correspond to the second inner mold tile block (12) are arranged in the circumferential direction of the outer shaft (22); bulges (5) are respectively arranged at one ends of the first fixing plate (3) and the second fixing plate (4) far away from the sleeve shaft assembly (2), and a clamping groove (6) for clamping the bulges (5) is fixedly connected with the first inner die pad (11) and the second inner die pad (12); the first fixing plate (3) and the second fixing plate (4) are both right-angled triangles, one right-angled side of each right-angled triangle is arranged on the mandrel (21) or the outer shaft (22) and has the length equal to the height of the capsule barrel (1), the other right-angled side of each right-angled triangle is perpendicular to the mandrel (21) and the outer shaft (22) and is arranged at the top of the capsule barrel (1) and has the length equal to the inner diameter of the top of the capsule barrel (1), and protrusions (5) are arranged on the inclined sides of the right-angled triangles along the two sides of the edges; the bottom of the bag barrel (1) is provided with a guide rail disc (8), and the surface of the guide rail disc (8) is provided with a radial guide rail (9) for limiting the radial movement of the first inner die pad (11) and the second inner die pad (12).

2. The rigid inner mold of a tire vulcanizer according to claim 1, wherein the bottom of the first fixing plate (3) corresponding to the first inner mold shoe (11) is provided with a locking assembly (7).

3. The rigid inner mold of a tire vulcanizer of claim 1, wherein said transmission means is a drive servo motor.

4. The rigid inner mold of a tire vulcanizer of claim 1, wherein the longitudinal outer contour curve of said first inner mold shoe (11) and second inner mold shoe (12) coincides with the inner contour curve of the tire, and the transverse outer contour lines of said first inner mold shoe (11) and second inner mold shoe (12) form a circle, the outer diameter of which is equal to the inner diameter of the tire.

5. The rigid inner mold of the tire vulcanizer of claim 1, wherein an electromagnetic heating device is provided on the outer mold fitted with said rigid inner mold for tire vulcanization molding.

6. The rigid inner mold of a tire vulcanizer according to claim 1, wherein said first inner mold shoe (11) and said second inner mold shoe (12) are made of steel, and a thermocouple is disposed inside said bladder tube (1).