CN210791680U - Vacuumizing tire mold and sealing piece and sealing structure thereof - Google Patents

Abstract

The utility model relates to a tire mould field provides an evacuation tire mould and sealing member and seal structure thereof. The sealing element is provided with an insertion part which is used for being in insertion fit with the sealing groove on the tire mold, and the insertion part is provided with a first clamping structure which is used for forming anti-falling fit with the sealing groove. This close structure is including setting up the seal groove on the sealed face of treating of upper cover, upper plate, base or lower side plate of tire mould, the seal groove be used for with the grafting portion grafting cooperation on the sealing member, the inside of seal groove is equipped with and is used for forming anticreep complex second joint structure with the grafting portion. Above-mentioned sealing member is through the first joint structure that sets up on it, can form stable anticreep cooperation with the second joint structure in the seal groove, no matter when installation or follow-up use, the sealing member is difficult to take place the dislocation to provide the guarantee for the sealing member is at the sealed of curb plate between upper cover and/or base.

Description

Vacuumizing tire mold and sealing piece and sealing structure thereof

Technical Field

The disclosure relates to the field of tire molds, in particular to a vacuumizing tire mold and a sealing piece and a sealing structure thereof.

Background

The tyre mold is used for vulcanizing various tyres and is divided into two halves and a movable mold.

The two half molds consist of an upper mold and a lower mold, and both the upper mold and the lower mold comprise a crown pattern part and a sidewall character part.

The segmented mold generally also comprises an upper mold and a lower mold, wherein the upper mold generally comprises an upper cover, a middle mold sleeve, a slide block, an upper side plate, a pattern block, a guide mechanism and the like, is arranged on a movable mold plate of a vulcanizing machine, and moves along with a mold closing system on the vulcanizing machine in the tire vulcanization molding process; the lower mold generally includes a base, a lower side plate, etc., and is mounted on a fixed platen of the vulcanizer. When vulcanization molding is carried out, the upper die and the lower die are closed, the capsule is inflated to open to form a closed cavity, the tire blank which is wound and molded in advance is sleeved outside the capsule and is attached to the inner wall of the cavity under the tension of the capsule, and vulcanization is carried out at high temperature and pressure maintaining. And opening the mold after vulcanization molding, separating the upper mold from the lower mold, and taking out the tire product by a manipulator of a vulcanizing machine.

The segmented mold can be divided into a vacuum pumping type, an exhaust type and a vacuum auxiliary exhaust type. With the wider application range of radial tires, particularly tires with complex patterns, the more complex the patterns of the treads, the more easily the problem of unsmooth exhaust of the mold occurs in the tire forming process, which causes the tire to lack of rubber and affects the appearance of the tire. In order to discharge gas smoothly, the traditional segmented mold is characterized in that a large number of exhaust holes are formed in the surface of a cavity, gas between a tire blank and the surface of the mold is discharged passively through the exhaust holes, when the tire has a complex pattern structure and large pattern depth, the tire is affected by temperature and the flowability of the heated tire blank, the air trapping phenomenon is easy to occur, the tire is lack of glue, the tire edge is not clear, and the use performance and the appearance of the tire are affected.

In order to solve the problem of air pocket, a vacuum-pumping type adjustable die can be adopted, or an exhaust type die can be modified into a vacuum-pumping type die. The vacuum-pumping mould is sealed by the sealing rings arranged between the base and the lower side plate and between the upper cover and the upper side plate, so that the cavity is in a closed space to carry out vacuum pumping, the air pocket phenomenon cannot occur between the tire blank and the mould due to the influence of the exhaust blind area in a vacuum environment, and the high-quality tire can be formed.

From the above, the sealing performance of the sealing ring can directly influence the vacuum pumping effect, and further influence the tire molding quality. The sealing performance of the sealing ring is determined by the structure of the sealing part on one hand and the installation stability of the sealing ring on the other hand. For promoting sealed effect, the structure to the sealing washer among the prior art has designed, but has not had the consideration to sealing washer installation stability yet. Therefore, the sealing ring can be dislocated or twisted during installation operation and subsequent use of the sealing ring, so that the sealing performance is unstable, and the hidden danger of air leakage exists.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem or at least partially solve the technical problem, an aspect of the utility model discloses a sealing member for evacuation tire mold, this sealing member includes the sealing member body, be equipped with on the sealing member body be used for with the sealing groove grafting complex grafting portion on the tire mold, be equipped with in the grafting portion be used for with the sealing groove forms anticreep complex first joint structure.

Optionally, the seal body is annular; and/or the presence of a gas in the gas,

the cross-sectional shape of the sealing element body is T-shaped, and the vertical part of the T-shaped sealing element is the insertion part.

Optionally, the first clamping structure is a protruding part or a recessed part extending along the side of the plugging direction of the plugging part; and/or the presence of a gas in the gas,

the thickness of the insertion part is gradually increased along the insertion direction, the insertion part is formed into the first clamping structure, preferably, the included angle between the side walls of the two sides of the insertion part is 2-30 degrees, preferably, the included angle between the side walls of the two sides of the insertion part is 2.5-8 degrees.

The utility model discloses another aspect discloses an evacuation tire mould seal structure, including setting up the seal groove on the sealed face of treating of tire mould's upper cover, upper plate, base or lower side plate, the seal groove be used for with the grafting portion grafting cooperation on the sealing member, the inside of seal groove be equipped with be used for with grafting portion forms anticreep complex second joint structure.

Optionally, the sealing groove is annular;

preferably, the sealing groove is arranged on a positioning convex ring of an upper cover, an upper side plate, a base or a lower side plate of the tire mold;

preferably, the seal groove comprises an outer ring and an inner ring located inside the outer ring, the inner ring at least forms an inner side wall of the seal groove, and the inner ring comprises a plurality of arc-shaped sections distributed circumferentially; each arc-shaped section is detachably connected with the outer ring, and/or a plurality of arc-shaped sections are sequentially detachably connected end to end.

Optionally, the second clamping structure is a protrusion or a recess structure disposed on a sidewall of the sealing groove; alternatively, the first and second electrodes may be,

the width of the sealing groove is gradually reduced from inside to outside, and the width of the sealing groove is gradually reduced from inside to outside the sealing groove is formed into the second clamping structure, preferably, the included angle between the side walls of the two sides of the sealing groove is 2-30 degrees, preferably, and the included angle between the side walls of the two sides of the inserting part is 2.5-8 degrees.

Optionally, a notch is formed in at least one side wall of the sealing groove, and the notch is used for enabling a disassembling tool to be inserted between the sealing element and the sealing groove;

preferably, the notch is arranged on the inner side wall of the sealing groove;

preferably, the bottom of the notch is an inclined plane structure facing the direction of the notch of the sealing groove, and preferably, the bottom end of the inclined plane structure extends to the bottom of the sealing groove.

Preferably, the top end of the inclined surface structure extends to the middle lower part of the sealing groove.

Optionally, the bottom of the gap is coplanar with the bottom of the sealing groove.

Optionally, the number of the gaps is multiple.

The utility model discloses the third aspect still discloses an evacuation tire mould, include as above evacuation tire mould sealing member and the sealing groove of setting on the sealed face of waiting of upper cover, upper side board, base or lower side board with it complex, preferably, grafting portion increases along inserting direction thickness gradually, the width of sealing groove reduces from inside to outside gradually, the contained angle between the both sides lateral wall of grafting portion is greater than the contained angle between the lateral wall of sealing groove both sides, preferably, the contained angle between the lateral wall of grafting portion both sides is greater than the contained angle between the lateral wall of sealing groove both sides 0.1 ~ 3 °; or, include an evacuated tire mold seal structure as described above and a seal engaged therewith.

By last knowing, the sealing member can form stable anticreep cooperation with the seal groove through the first joint structure that sets up on it to no matter in installation or follow-up use, the dislocation is difficult to take place for the sealing member or twist reverse, thereby makes the sealing member form stable sealed between curb plate and base down.

Drawings

Fig. 1 is a schematic view of an evacuated tire mold according to an embodiment of the present invention;

FIG. 2 is a first schematic view of the seal of FIG. 1;

FIG. 3 is a second schematic view of the seal of FIG. 1;

FIG. 4 is a third schematic view of the seal of FIG. 1;

FIG. 5 is a fourth schematic view of the seal of FIG. 1;

FIG. 6 is a fifth schematic view of the seal of FIG. 1;

FIG. 7 is a sixth schematic view of the seal configuration of FIG. 1;

FIG. 8 is a seventh schematic view of the seal of FIG. 1;

FIG. 9 is a top view of the base of FIG. 1;

FIG. 10 is an enlarged view at A in FIG. 9;

fig. 11 is a partial schematic view seen from the direction M in fig. 9.

Reference numerals:

1. an upper cover; 2. a middle die sleeve; 3. an upper side plate; 4. pattern blocks; 5. an arcuate seat; 6. a base; 7. a lower side plate; 8. a sealing structure; 810. a seal member; 811. a seal body; 812. a plug-in part; 813. a boss portion; 814. a recessed structure; 815. an inner ring; 816. a bolt; 820. a sealing groove; 821. an outer sidewall; 822. an inner sidewall; 823. and (6) opening.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are some, but not all embodiments of the invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a vacuum tire mold, which is composed of an upper cover 1, a middle mold sleeve 2, an upper side plate 3, a pattern block 4, an arch base 5, a base 6, a lower side plate 7, and the like.

Wherein, a sealing structure 8 is arranged between the lower side plate 7 and the base 6, and as shown in fig. 2, the sealing structure 8 comprises a sealing member 810 and a sealing groove 820 matched with the sealing member 810. The sealing groove 820 may be formed on the surface to be sealed where the base 6 and the lower side plate 7 are fitted to each other, or may be formed on the surface to be sealed where the lower side plate 7 and the base 6 are fitted to each other, as long as the sealing member 810 can be installed between the base 6 and the lower side plate 7. The sealing groove 820 is preferably an annular structure extending along the circumferential direction of the base 6, and is preferably disposed near the radially inner end of the base 6, so that the sealed area formed by the sealing element 810 covers all the exhaust holes on the lower side plate 7. More preferably, the sealing groove 820 may be provided on a positioning protruding ring of the upper cover 1, the upper side plate 3, the base 6 or the lower side plate 7, the positioning protruding ring is an annular structure protruding outward relative to the body portion of the upper cover 1, the upper side plate 3, the base 6 or the lower side plate 7, and the positioning protruding ring is used to form the sealing groove, so that the structural strength of the body portion of the corresponding component is not damaged, and the sealing groove can be used for positioning between the upper cover 1 and the upper side plate 3 or between the base 6 and the lower side plate 7.

Of course, the sealing structure 8 may be disposed between the upper cover 1 and the upper side plate 3, that is, the sealing groove 820 is formed on the surface of the upper cover 1 that is engaged with the upper side plate 3, or the surface of the upper side plate 3 that is engaged with the upper cover 1. A seal 810 is provided to engage the seal groove 820.

Seal 810 includes a seal body 811, and seal body 811 is preferably annular in shape to conform to the shape of seal groove 820. The sealing element body 811 is provided with a plug-in part 812, and the plug-in part 812 is in plug-in fit connection with the sealing groove 820; the insertion part 812 is further provided with a first clamping structure, a second clamping structure is arranged in the sealing groove 820, and after the insertion part 812 is inserted into the sealing groove 820, the first clamping structure and the second clamping structure in the sealing groove 820 form anti-disengaging fit.

From the above, the sealing element 810 can form a stable anti-disengagement fit with the sealing groove 820 through the first clamping structure arranged on the sealing element 810, so that the sealing element 810 is not easy to dislocate or twist in the installation process or the subsequent use, and the sealing element 810 forms a stable seal between the lower side plate 7 and the base 6.

As shown in fig. 3, in some alternative embodiments, the first clamping structure is a protrusion 813 or a recess extending along a side of the inserting and pulling direction of the inserting part 812. Correspondingly, the second clamping structure is a concave structure 814 or a convex structure arranged on the side wall of the sealing groove 820, that is, the first clamping portion and the second clamping portion form a tongue-and-groove fit, so that the anti-falling function is realized. The connection part of the sealing member 810 is clamped with the concave or convex structure on the sealing groove 820 by the convex or concave structure 814 thereon, so that the operation is convenient.

In other alternative embodiments, as shown in FIG. 4, mating portion 812 may have a thickness that increases in the insertion direction, i.e., a "dovetail" configuration, and mating portion 812 may have a thickness that increases in the insertion direction, i.e., a first snap configuration. The inserting part 812 forms anti-falling fit with the sealing groove 820 through the self dovetail-shaped structure, and the anti-falling effect is stable.

In a further embodiment, the included angle between the two side walls of the insertion part 812 is 2 to 30 °, preferably 2.5 to 8 °, and correspondingly, the included angle between the two side walls of the sealing groove 820 is 2 to 30 °, preferably 2.5 to 8 °. While meeting the anti-dropping requirement in the normal use process, the included angle range can also facilitate the detachment of the sealing element 810 from the sealing groove 820, thereby reducing the damage to the sealing element 810 when the detachment is performed. The angle can be selected according to the length of the downward extension of the insertion part 812, and when the insertion part 812 is longer, the thickness should be set smaller to avoid damage caused by the fact that the insertion part cannot be inserted smoothly. When the mating part 812 is short, the thickness is set to be larger, and the mating part 812 is prevented from coming off.

In a further embodiment, the angle between the sidewalls of the insertion portion 812 is greater than the angle between the sidewalls of the sealing groove 820, so that the insertion between the sealing element 810 and the sealing groove 820 is more secure. For the above embodiment, the included angle between the sidewalls of the mating part 812 is preferably 0.1 to 2 ° greater than the included angle between the sidewalls of the sealing groove 820.

As shown in fig. 7, in some embodiments, the sealing groove 820 includes an outer ring and an inner ring 815 located inside the outer ring, taking the example that the sealing groove 820 is opened on a base, the outer ring is formed by the base, and the inner ring 815 at least forms an inner sidewall of the sealing groove 820, that is, the inner ring 815 may be the same as the inner sidewall of the sealing groove 820, or may be a groove bottom structure that includes part or all of the sealing groove 820 on the basis of the inner sidewall structure; the inner ring 815 includes two or more arcuate segments distributed circumferentially.

Each arc-shaped section can be detachably connected with the outer ring through a bolt 816 and other structures, so that the arc-shaped sections and the outer ring are combined to form a sealing groove 820; a certain gap can be reserved between two adjacent arc-shaped sections, contact sections which are overlapped with each other can also be reserved between the two adjacent arc-shaped sections, and even the two adjacent arc-shaped sections can be connected with each other through structures such as bolts. Of course, the arc segments may be detachably connected end to end in sequence, and are spliced into a stable ring shape and abutted against the inner side of the outer ring, so that the sealing groove 820 may be formed.

When the sealing element 810 is detached, the inner side wall of the sealing groove 820 is formed into a plurality of arc-shaped segments, and the arc-shaped segments can be detached radially inward, that is, the inner side wall of the sealing groove 820 is detached, so that when the sealing element 810 is continuously detached, the sealing element 810 cannot be greatly worn due to the extrusion of the inner side wall and the outer side wall 821 of the sealing groove 820, and particularly, in the case that the connecting part and the side wall of the sealing groove 820 are in a concave-convex matching structure, as shown in fig. 8, the wear of the sealing element 810 can be greatly reduced.

In the above embodiment, the included angle between the sidewalls of the insertion part 812 is preferably 1-3 degrees larger than the included angle between the sidewalls of the inner ring 815 and the outer ring

In alternative embodiments, the cross-sectional shape of seal body 811 is T-shaped, with the vertical portion of T-shaped seal 810 configured as spigot 812 and the horizontal portion configured as seal body 811. The T-shaped sealing element 810 comprises a vertical part forming the insertion part 812 and a transverse part for sealing, and two ends of the transverse part extend out of two sides of the vertical part, namely the transverse part has a larger sealing area, so that the T-shaped sealing element can play a good role in sealing and plugging hoisting holes, exhaust holes and the like of a die; in addition, the connection structure of the horizontal portion and the vertical portion for sealing is stable, and the connection structure of the vertical portion for clamping and contacting with the sealing groove 820 is also stable, so that the sealing member 810 can form a stable seal at the position to be sealed.

In a further embodiment, a gap is formed between one side of the transverse portion of the T-shaped seal 810 and the inner wall 822 or the outer wall 821 of the seal groove 820, and a gap is also formed between the vertical portion of the T-shaped seal 810 and the groove bottom of the seal groove 820, which are used to prevent the sealing surface of the seal 810 from being not tightly attached due to extrusion deformation.

In some alternative embodiments, as shown in fig. 4 to 11, a gap 823 is formed on at least one side wall of the sealing groove 820, that is, the gap 823 is formed on an inner side wall 822 of the sealing groove 820, as shown in fig. 5, or on an outer side wall 821 of the sealing groove 820, as shown in fig. 6, but is preferably formed on the inner side wall 822 of the sealing groove 820, so as to facilitate the detachment of the sealing element 810. The gap 823 is used to allow a removal tool to penetrate between the seal 810 and the seal groove 820. This opening 823 can supply the extracting tool to pass through to prize sealing member 810, makes things convenient for the dismantlement work of sealing member 810, prevents that sealing member 810 from leading to the fact wearing and tearing because of the powerful dismantlement. It is understood that the sealing groove 820 having the slit 823 is not limited to fit the sealing element 810 of the above-described structure, and may be applied to various other structures or cross-sectional shapes of the sealing element 810.

Wherein the removal tool may be a flat bar structure having a certain thickness and strength.

In a further embodiment, as shown in fig. 5, the bottom of the gap 823 is formed as an inclined surface facing the opening of the sealing groove 820. The inclined plane structure can guide the disassembling tool to slide downwards obliquely and smoothly to the lower part of the sealing element 810, so that the operation is convenient. In addition, the top end of the bevel structure can be used as a prying point of a disassembling tool, so that the disassembling tool can pry the T-shaped bottom of the sealing element 810 conveniently.

Preferably, as shown in FIG. 5, the bottom end of the ramp structure extends to the bottom of the sealing groove 820. The removal tool can be guided directly to the bottom end of the sealing member 810, and particularly when there is a gap between the sealing member 810 and the bottom of the sealing groove 820, the removal tool can smoothly slide into the gap, making the removal operation more convenient.

In some further embodiments, the top end of the ramp structure extends to a lower middle portion of the sealing groove 820. The opening 823 with a larger caliber is formed, so that the insertion of a disassembling tool is easy, and the operation is convenient.

In some further embodiments, as shown in figure 4, the bottom of the gap 823 is coplanar with the bottom of the seal groove 820. Facilitating a removal tool to be wedged or driven between the seal 810 and the bottom of the seal groove 820, facilitating prying of the seal 810 from the bottom of the seal 810.

In addition, as shown in fig. 9 to 11, the number of the gaps 823 may be multiple, and the multiple gaps 823 form multiple detachment points in the circumferential direction of the sealing element 810, so that the sealing element 810 can be conveniently removed in a complete ring manner.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (22)

1. The utility model provides an evacuation tire mould's sealing member, its characterized in that includes the sealing member body, be equipped with on the sealing member body be used for with the sealing groove grafting complex grafting portion on the tire mould, be equipped with in the grafting portion be used for with the sealing groove forms anticreep complex first joint structure.

2. The evacuated tire mold seal according to claim 1, wherein the seal body is annular; and/or the presence of a gas in the gas,

the cross-sectional shape of the sealing element body is T-shaped, and the vertical part of the T-shaped sealing element is the insertion part.

3. The sealing member of the evacuated tire mold according to claim 1 or 2, wherein the first clamping structure is a convex portion or a concave portion extending along a lateral direction of the insertion and extraction direction of the insertion portion; and/or the presence of a gas in the gas,

the thickness of the insertion part is gradually increased along the insertion direction, and the insertion part with the gradually increased thickness along the insertion direction is formed into the first clamping structure.

4. The sealing member for an evacuated tire mold according to claim 3, wherein an angle between both side walls of the insertion portion is 2 to 30 °.

5. A vacuum tyre mould seal as claimed in claim 4 wherein the angle between the side walls of the spigot is in the range 2.5 to 8 °.

6. The utility model provides an evacuation tire mould's seal structure, its characterized in that, including setting up the seal groove on the sealed face of treating of tire mould's upper cover, upper plate, base or lower side plate, the seal groove be used for with the cooperation of pegging graft of grafting portion on the sealing member, the inside of seal groove be equipped with be used for with grafting portion forms anticreep complex second joint structure.

7. The sealing structure of an evacuated tire mold according to claim 6, wherein the sealing groove is annular.

8. The sealing structure of an evacuated tire mold according to claim 7, wherein the sealing groove is provided on a positioning convex ring of an upper cover, an upper side plate, a base or a lower side plate of the tire mold.

9. The sealing structure of an evacuated tire mold according to claim 8, wherein the sealing groove comprises an outer ring and an inner ring located inside the outer ring, the inner ring at least forms an inner sidewall of the sealing groove, and the inner ring comprises a plurality of arc-shaped segments distributed circumferentially; each arc-shaped section is detachably connected with the outer ring, and/or a plurality of arc-shaped sections are sequentially detachably connected end to end.

10. The sealing structure of the evacuated tire mold according to claim 6, wherein the second clamping structure is a protrusion or a recess structure provided on a sidewall of the sealing groove; and/or the presence of a gas in the gas,

the width of the sealing groove is gradually reduced from inside to outside, and the width of the sealing groove is gradually reduced from inside to outside to form the second clamping structure.

11. The sealing structure of the evacuated tire mold according to claim 10, wherein an included angle between side walls of the sealing groove on both sides is 2 to 30 °.

12. A sealing structure for an evacuated tyre mould as claimed in claim 11, wherein an angle between side walls of the spigot portion is 2.5-8 °.

13. A sealing structure for an evacuated tyre mould according to any one of claims 6 to 12, wherein a gap is provided on at least one side wall of the sealing groove, and the gap is used for a tool for removing to penetrate between the sealing member and the sealing groove.

14. The sealing structure of an evacuated tire mold according to claim 13, wherein the gap is provided on an inner sidewall of the sealing groove.

15. The sealing structure of an evacuated tire mold according to claim 14, wherein a bottom of the gap is a slope structure facing a notch direction of the sealing groove.

16. The sealing structure of an evacuated tire mold according to claim 15, wherein a bottom end of the slope structure extends to a bottom of the sealing groove.

17. The sealing structure of an evacuated tire mold according to claim 16, wherein a top end of the slope structure extends to a middle lower portion of the sealing groove.

18. The sealing structure of evacuated tire mold according to claim 13, wherein the bottom of the breach is coplanar with the bottom of the sealing groove.

19. The sealing structure of an evacuated tire mold according to claim 13, wherein the number of the gap is plural.

20. An evacuated tire mold, characterized by comprising the sealing member of the evacuated tire mold according to any one of claims 1 to 5 and a sealing groove provided on a surface to be sealed of the upper cover, the upper side plate, the base or the lower side plate in cooperation therewith; alternatively, a sealing structure comprising an evacuated tyre mould according to any one of claims 6 to 19 and a sealing member cooperating therewith.

21. The evacuated tire mold according to claim 20, wherein the thickness of the insertion portion is gradually increased along the insertion direction, the width of the sealing groove is gradually decreased from inside to outside, and the included angle between the sidewalls of the two sides of the insertion portion is larger than the included angle between the sidewalls of the two sides of the sealing groove.

22. The evacuated tire mold according to claim 21, wherein an included angle between the sidewalls of the insertion portion is 0.1 to 3 ° larger than an included angle between the sidewalls of the sealing groove.

Images