CN108274792B

CN108274792B - Sealing device and vacuumizing tire mold

Info

Publication number: CN108274792B
Application number: CN201810297478.3A
Authority: CN
Inventors: 张伟; 刘代平; 李健; 王通; 翟宝堂; 刘卫华; 王家栋
Original assignee: Himile Mechanical Science and Technology Shandong Co Ltd
Current assignee: Himile Mechanical Science and Technology Shandong Co Ltd
Priority date: 2018-04-04
Filing date: 2018-04-04
Publication date: 2020-05-22
Anticipated expiration: 2038-04-04
Also published as: CN108274792A

Abstract

The invention relates to the field of tire mold structures, and discloses a sealing device and a vacuumizing tire mold. A sealing device that cooperates with side panels and a base and/or upper cover of a tire mold to seal the tire mold. The sealing device further comprises a sealing element; the sealing element is arranged on the radial inner side of the base and/or the upper cover, and the sealing element is configured to be positioned on the matching surface of the base and/or the upper cover and the side plate; the seal extends from a radially inner side of the base and/or upper cover to a radially outer side of the base and/or upper cover. The vacuum-pumping tire mold is simple in structure, excellent in sealing effect and convenient to maintain.

Description

Sealing device and vacuumizing tire mold

Technical Field

The invention relates to the field of tire mold structures, in particular to a sealing device and a vacuumizing tire mold.

Background

Referring to fig. 1, when the tire mold 10 is used, in order to smoothly discharge air, by forming a large number of vent holes on the cavity surface, air between the green tire and the mold tread is passively discharged through the vent holes 15,

when the tire has a complex pattern structure and a large pattern depth, the tire is easily affected by temperature and the mobility of a tire blank after being heated, and the air pocket phenomenon is easily caused, so that the tire is lack of glue, the tire edge is not clear, and the service performance and the appearance of the tire are affected.

The sealing ring 14 between the existing base 11 and the lower side plate 12 is typically an O-ring, the sealing ring 14 is disposed in a sealing groove 13 on the base, and the position of the sealing ring 14 is typically a predetermined distance from the radial inner side of the base 11, so that the sealing range of the mold in the radial direction is small. Also, this problem exists between the prior art upper cover and upper side panel, (not shown in fig. 1).

Moreover, if the non-vacuum-pumping mold is changed into the vacuum-pumping mold, especially when the position of the lower side plate 12 or the upper side plate air hole is out of the sealing range, the sealing effect cannot be achieved and the vacuum-pumping function cannot be improved without improving the lower side plate 12 or the upper side plate; if the cavity is modified, the modification workload is large, the cost is high, and the popularization of the vacuum-pumping mould shell is not facilitated.

Disclosure of Invention

The object of the present invention includes providing a tire mold sealing device capable of improving the problems of poor sealing effect and inconvenience in manufacturing in the related art.

Another object of the present invention is to provide an evacuated tire mold including the sealing device.

The embodiment of the invention is realized by the following technical scheme:

a sealing device for cooperating with a side panel and a base and/or an upper cover of a tire mold to seal the tire mold, the sealing device further comprising a seal;

the sealing element is arranged on the radial inner side of the base and/or the upper cover, and the sealing element is configured to be positioned on the matching surface of the base and/or the upper cover and the side plate; the seal extends from a radially inner side of the base and/or upper cover to a radially outer side of the base and/or upper cover.

The inventor finds that when the tire pattern structure is complex and the pattern depth is large, the conventional tire mold is easily affected by the temperature and the mobility of a tire blank after being heated, and the air pocket phenomenon is easily caused, so that the tire is lack of glue, the tire edge is not clear, and the use performance and the appearance of the tire are affected.

Further, the inventor found that the base and/or the upper cover of the tire mold of the related art and the side plate are sealed by the O-ring, and the sealing area of the O-ring is only in the radial direction of the O-ring to complete the sealing work, so that the sealing range is small. And sealing is not well accomplished in the radial direction of the base and/or the upper cover. If a non-vacuumizing mold is changed into a vacuumizing mold, particularly when the position of the air hole of the side plate is out of the sealing range, the sealing effect cannot be achieved and the vacuumizing function cannot be improved if the side plate is not improved; if the cavity is modified, the modification workload is large, the cost is high, and the popularization of the vacuum-pumping mould shell is not facilitated.

The sealing device of the disclosed aspect is capable of cooperating with a base and/or an upper cover and side plates of a tire mold to seal the tire mold. The sealing device further comprises a sealing element; the sealing element is arranged on the radial inner side of the base and/or the upper cover, and the sealing element is configured to be positioned on the matching surface of the base and/or the upper cover and the side plate; the seal extends from a radially inner side of the base and/or upper cover to a radially outer side of the base and/or upper cover. So make the seal area at base and/or upper cover radial direction show the increase to ensured that tire mould can possess good sealed effect, and then guaranteed that the tire product has good quality and quality.

In conclusion, the sealing device has the advantages of superior sealing effect, low cost, convenience in maintenance and remarkable economic benefit.

Further, a seal is provided at a radially inner end of the base and/or the upper cover.

Further, the sealing member is disposed on the mating surface, and the sealing member is provided with a first groove, and the first groove is preferably toward one side of the mating surface.

Further, the seal includes a body;

preferably, the seal further comprises a connecting portion;

the connecting part is arranged in the length direction of the main body and forms a preset included angle with the main body,

preferably, the connection part is provided at an end of the body in a length direction thereof, or the connection part is provided at a middle of the body in the length direction thereof.

Further, at least one part of the main body is abutted with the base and/or the upper cover;

preferably, one side of the sealing element facing the matching surface is provided with a first groove, and the first groove is arranged on the main body.

Further, the body may be divided into a first body and a second body; the connecting part is arranged between the first main body and the second main body;

one of the first main body and the second main body is abutted against the base, and a first preset distance is reserved between the other main body and the base;

or one of the first body and the second body is abutted against the upper cover, and the other is provided with a first preset distance from the upper cover.

Furthermore, the first main body is provided with a first preset distance with the base and/or the upper cover, and the connecting part is provided with a second preset distance with the base and/or the upper cover.

Further, a matching part which is matched with the connecting part in an inserting way is arranged on the base;

or the upper cover is provided with a matching part which is matched with the connecting part in an inserting way;

preferably, the mating portion is a step or a groove.

Further, a first bulge facing the side plate is arranged at the end part of the radial inner side of the base and/or the upper cover;

the sealing member is disposed on a surface of the first projection adjacent to the side plate.

Furthermore, a communication groove is formed in the side wall of the first component.

An evacuated tyre mould comprising a sealing device according to any of the preceding claims.

The embodiment of the invention has the beneficial effects that:

the sealing device is capable of interacting with the base and/or the upper cover and the side panels of the tire mold to seal the tire mold. The sealing device further comprises a sealing element; the sealing element is arranged on the radial inner side of the base and/or the upper cover, and the sealing element is configured to be positioned on the matching surface of the base and/or the upper cover and the side plate; the seal extends from a radially inner side of the base and/or upper cover to a radially outer side of the base and/or upper cover. Through setting up the sealing member at base and/or the radial inboard of upper cover and making the sealing member to base and/or the radial outside extension of upper cover, so make at base and/or the radial direction's of upper cover seal area show the increase to ensured that tire mould can possess good sealed effect, and then guaranteed that the tire product has good quality and quality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a partial schematic view of a lower side plate and base of a prior art tire mold;

FIG. 2 is a schematic structural view of an evacuated tire mold including a sealing device according to an embodiment of the present invention;

FIG. 3 is a first partial schematic view of FIG. 2;

FIG. 4 is another schematic structural view of the evacuated tire mold of FIG. 2;

FIG. 5 is a partial schematic view of a first configuration of a sealing device provided in accordance with an embodiment of the present invention;

FIG. 6 is a partial schematic view of a second configuration of a sealing device provided in accordance with an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6;

FIG. 8 is a partial schematic view of a third configuration of a sealing device provided in accordance with an embodiment of the present invention;

FIG. 9 is a partial schematic view of a fourth configuration of a sealing device provided in accordance with an embodiment of the present invention;

FIG. 10 is a partial schematic view of a fifth configuration of a sealing device provided in accordance with an embodiment of the present invention;

fig. 11 is a partial schematic view of a sixth structure of a sealing device according to an embodiment of the present invention.

Icon: 10-a tyre mould; 11-a base; 12-lower side plate; 13-a seal groove; 14-a sealing ring; 15-air vent; 20-vacuumizing the tire mold; 110-an upper cover; 120-middle die sleeve; 131-an arcuate seat; 132-pattern blocks; 141-upper side plate; 142-a lower side plate; 150-a base; 161-upper slide block; 162-a mounting ring; 171-an upper sealing ring; 172-lower seal ring; 200-a sealing device; 201-a seal; 211 — a first recess; 221-a body; 222-a connecting portion; 230-a first step; 231-a seal groove; 242-a first body; 243-a second body; 255-a second groove; 260-a first protrusion; 270-vent holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 2, fig. 2 is a schematic structural diagram of an evacuated tire mold 20 including a sealing device 200 according to an embodiment of the present invention. From fig. 2, there is seen an evacuated tire mold 20 comprising a lower side plate 142, a base 150, and a sealing device 200.

As an embodiment, the upper cover 110, the arch seat 131, the blocks 132, the upper side plate 141, and the middle mold sleeve 120 are further included. Wherein the upper side plate 141 and the lower side plate 142 may be collectively referred to as side plates.

An arcuate seat 131 slidably provided on the middle die case 120 to move in a radial direction, and a block 132 provided on a radially inner side of the arcuate seat 131 away from the middle die case 120; the arcuate seat 131 is slidably coupled to the upper cover 110 by an upper slider 161; the upper side plate 141 is arranged at the bottom of the upper cover 110, and the upper side plate 141 is abutted against the top of the pattern block 132; the lower side plate 142 is arranged on the top of the base 150, and the lower side plate 142 abuts against the bottom of the pattern block 132; the base 150 abuts against the bottom of the arched seat 131; the blocks 132, the upper side plate 141 and the lower side plate 142 collectively enclose a housing space for housing a green tire.

The pattern block 132 is fixed with the arch base 131 by a locking screw, the outer side of the arch base 131 and the inner side of the middle die sleeve 120 are inclined planes, the arch base 131 and the middle die sleeve 120 form a guidable inclined plane through a guide strip, the upper part of the arch base 131 is connected with an upper sliding block 161, and the upper part of the middle die sleeve 120 is connected with a mounting ring 162.

The mounting ring 162 is disposed on the top of the middle mold 120 by bolts such that the top surface of the mounting ring 162 is flush with the top surface of the upper cover 110. Thus, when the vulcanizer operates, the upper hot plate (not shown) can stably press down the mold.

The sealing device 200 further comprises a seal 201; the sealing member 201 is disposed radially inside the base 150 and/or the upper cover 110, and the sealing member 201 is configured to be located on the mating surfaces of the base 150 and/or the upper cover 110 and the side plates; the seal 201 extends from a radially inner side of the base 150 and/or the upper cover 110 to a radially outer side of the base 150 and/or the upper cover 110.

When the structure of the tire pattern is complex and the depth of the pattern is large, the existing tire mold is influenced by the temperature and the mobility of a tire blank after being heated, and is very easy to have air pocket phenomenon, so that the tire is lack of glue, the edge of the tire is not clear, and the use performance and the appearance of the tire are influenced. Therefore, in the prior art, vent holes need to be formed in the blocks and the side plates (including the upper side plate and/or the lower side plate, the same below) of the mold to remove air, but the position of the side plate of the existing vacuumizing mold cannot be close to the radial inner side of the mold as shown in fig. 1, otherwise, the vacuum state of the green tire accommodating space is damaged, and air enters from the vent holes. Especially, the exhaust hole is for considering the convenience of processing, and its exhaust hole direction is mostly along the normal direction extension of curb plate curved surface, and the decorative pattern of radial inboard curb plate can appear nest gas when vulcanizing the tire this moment, causes the tire to lack glue, tire arris is unclear, influences the problem of the performance and the outward appearance of tire. In the sealing member 201 of the present application, as shown in fig. 2 or fig. 4, the sealing member 201 may be disposed at a position close to the innermost side of the side plate, and the exhaust hole may extend to the upper end surface of the sealing member, and at this time, an exhaust line or an exhaust groove may be additionally disposed on the upper end surface of the sealing member, the exhaust line or the exhaust groove only extends to the outer side of the radial direction of the main body, and the exhaust line or the exhaust groove is sealed inward in the radial direction of the main body (that is, the exhaust hole may be processed in a wider range in the present. Thereby the area of messenger's evacuation is close to the inboard position of curb plate more, avoids the evacuation mould to be close to inboard curb plate and the problem of the starved of appearing when vulcanizing the tire.

Further, the inventor finds that the base 150 and/or the upper cover 110 of the tire mold of the prior art are sealed with the side plates by the O-ring, the sealing area of the O-ring is only sealed in the radial direction of the O-ring, and the sealing range is small. And sealing is not well accomplished in the radial direction of the base 150 and/or the upper cover 110. If a non-vacuumizing mold is changed into a vacuumizing mold, particularly when the position of the air hole of the side plate is out of the sealing range, the sealing effect cannot be achieved and the vacuumizing function cannot be improved if the side plate is not improved; if the cavity is modified, the modification workload is large, the cost is high, and the popularization of the vacuum-pumping mould shell is not facilitated.

The sealing device 200 of aspects of the present disclosure is capable of interacting with the base 150 and/or the upper cover 110 and side plates of a tire mold to seal the tire mold. The sealing device 200 further comprises a seal 201; the sealing member 201 is disposed radially inside the base 150 and/or the upper cover 110, and the sealing member 201 is configured to be located on the mating surfaces of the base 150 and/or the upper cover 110 and the side plates; the sealing member 201 extends from the radial inner side of the base 150 and/or the upper cover 110 to the radial outer side of the base 150 and/or the upper cover 110, and the sealing device with the structure realizes the transformation from the non-vacuum-pumping mold to the vacuum-pumping mold. Meanwhile, the sealing area of the base 150 and/or the upper cover 110 in the radial direction is remarkably increased, so that the tire mold is guaranteed to have a good sealing effect, and the tire mold is particularly suitable for transformation of a non-vacuumizing mold when the position of a side plate air hole is outside a sealing range, and further the tire product is guaranteed to have excellent quality and quality. The sealing device 200 has the advantages of superior sealing effect, low cost, convenient maintenance and remarkable economic benefit.

The tire mold also has an upper sealing device, as one embodiment of the upper sealing device, please continue to refer to fig. 2 for further details. As can be seen, the mounting ring 162 and the upper cover 110 are each provided with an opposing annular step (not numbered) within which is disposed an upper sealing ring 171. An annular protrusion is disposed at a side of the bottom of the upper sealing ring 171 close to the upper cap 110, and an annular groove is disposed at a position of the upper cap 110 to which the annular protrusion is coupled. Further, the outer edge of the annular groove is a first conical surface, the outer side surface of the annular protrusion matched with the first conical surface is a second conical surface, and the two conical surfaces (the first conical surface and the second conical surface) play a guiding role, so that the upper sealing ring 171 is ensured to be matched with the upper cover 110 in a sealing manner. When the mold is opened, the annular step of the mounting ring 162 supports the upper sealing ring 171, and the upper sealing ring 171 moves upwards together with the mounting ring 162 and the upper hot plate of the vulcanizing machine; during mold closing, the mounting ring 162, the upper seal ring 171 and the upper plate of the vulcanizing machine move downward together until the upper seal ring 171 is in sealing engagement with the upper cover 110. As can also be seen, a sealing ring is provided between the upper sealing ring 171 and the upper cover 110, and the sealing ring is disposed in a sealing groove (not numbered in the figure, the same applies below) on the upper sealing ring 171 and/or the upper cover 110. A sealing ring is arranged between the upper sealing ring 171 and the mounting ring 162, and the sealing ring is arranged in a sealing groove on the upper sealing ring 171 and/or the mounting ring 162. A sealing ring is arranged between the mounting ring 162 and the middle die sleeve 120, and the sealing ring is arranged in a sealing groove on the mounting ring 162 and/or the middle die sleeve 120.

As can also be seen in fig. 2-4, a seal 201 is provided at the radially inner end of the base 150 and/or the upper cover 110. In this manner, the seal 201 is enabled to seal from a radially inward end position of the base 150 and/or the upper cover 110, providing a greater sealing range. Of course, as will be appreciated by those skilled in the art, this end is a location near the end (the radially inner end of the base 150 and/or the upper cover 110).

Further, the sealing member 201 is disposed on the mating surface, and the sealing member 201 is provided with a first groove 211, and the first groove 211 is preferably toward one side of the mating surface. Of course, the first recess 211 may also be oriented toward the non-mating surface.

The groove structure of the first groove 211 enables the amount of compressive deformation of the seal 201 to accumulate in the groove. The problem that the sealing performance of the sealing element 201 is reduced due to the fact that the upper end face of the sealing element 201 is protruded due to the fact that the transverse area of the sealing element 201 is too large and the compression deformation amount cannot be transmitted is solved. The volume of the groove is set according to the compression amount, and the compression deformation amount is not accumulated in the groove. Alternatively, the longitudinal section of the first groove 211 may be semicircular, or may be triangular, square, trapezoidal, etc., and the first groove 211 faces the base 150.

It should be noted here that fig. 1 to 3 show a case where the sealing member 201 is provided at the mating surface between the lower side plate 142 and the base 150, which is merely an example.

It is understood that the sealing member 201 may be disposed between the upper side plate 141 and the upper cover 110 (as shown in fig. 4), as long as the sealing member 201 can well seal the side plate (including the upper side plate 141 and/or the lower side plate 142) and the mold main body (including the base 150 and/or the upper cover 110).

Further, the sealing member 201 is disposed at a position of a mating surface between the base 150 and the lower plate 142, and/or between the upper cover 110 and the upper plate 141.

In other embodiments, the sealing member 201 can be disposed between the upper plate 141 and the upper cover 110 and/or between the base 150 and the lower plate 142, and is not described in detail.

Example 2

The sealing device 200 of the present embodiment is substantially the same as the sealing device of the first embodiment, further, the sealing member 201 includes a main body 221, and preferably, the sealing member 201 further includes a connecting portion 222; the connecting portion 222 and the main body 221 have a predetermined angle, which is preferably 90 degrees or approximately 90 degrees. Preferably, the connection portion 222 is provided at an end portion of the body 221 in a longitudinal direction, or the connection portion 222 is provided at a middle portion of the body 221 in the longitudinal direction.

At least a portion of the main body 221 abuts the base 150 and/or the upper cover 110.

The side plate of the main body 221 abutting against it is preferably parallel to the abutting surface of the base 150 and/or the upper cover 110, and is preferably annular.

Preferably, the side of the sealing member 201 facing the mating surface is provided with a first groove 211, and the first groove 211 is provided on the main body 221.

Further, the base 150 is provided with a matching portion which is in plug-in fit with the connecting portion 222; or the upper cover 110 is provided with a matching part which is matched with the connecting part 222 in an inserting way; preferably, the mating portion is a step or a groove.

Referring to fig. 5, fig. 5 shows a case where the connecting portion 222 is provided at an end portion of the main body 221 in the longitudinal direction. As can be seen from the figure, the cross-sectional shapes of the main body 221 and the connecting portion 222 are perpendicular to each other to form an L-shaped structure. The base 150 is provided with a mating portion, which is a first step 230 shown in fig. 5, for mating with the connecting portion 222.

The side surface of the connection portion 222 abuts against the side surface of the first step 230. The first recess 211 faces the base 150.

Here, the first step 230 functions to support and position the axial direction of the main body 221 by the function of the step side; of course, a groove may be formed on the side surface of the step, or a certain gap may be formed between the bottom surface of the connecting portion 222 and the first step 230, so that the compression deformation amount of the sealing member 201 can be accumulated in the first step 230. The problem that the sealing performance of the sealing element 201 is reduced due to the fact that the upper end face of the sealing element 201 is protruded due to the fact that the transverse area of the sealing element 201 is too large and the compression deformation amount cannot be transmitted is solved. The volume of the first step 230 is set according to the amount of compression, and it is sufficient to ensure that the amount of compression deformation is not accumulated in the first step 230.

It is understood that, in other embodiments, the first step 230 may be disposed on the side plate, and the connecting portion 222 may be inserted into the first step 230.

Further, the connecting portion 222 is located at an end of the main body 221 away from the radially inner side of the base 150 or the upper cover 110. Therefore, the connecting portion 222 can be well matched with the stepped hole at the radial inner end of the base 150 or the upper cover 110, and the processing amount is small, and the manufacturing is convenient. Optionally, in other embodiments, the connecting portion 222 may also be an end of the main body 221 near the inner side of the base 150.

Referring to fig. 6, fig. 6 shows a case where the connection portion 222 is disposed at a middle portion of the main body 221 in the longitudinal direction.

Further, the body 221 may be divided into a first body 242 and a second body 243; the connection portion 222 is disposed between the first body 242 and the second body 243; one of the first body 242 and the second body 243 has a part abutting against the base 150 and the other having a first predetermined distance from the base 150; or one of the first body 242 and the second body 243 has a portion abutting against the upper cover 110 and the other one thereof has a first predetermined distance from the upper cover 110. The abutting surfaces of the first and

second bodies

242 and 243 may be provided with grooves. Alternatively, both the first body 242 and the second body 243 may abut against the upper cover 110 or the base 150, and the abutting surfaces may be provided with grooves.

Here, the sealing member 201 includes a connecting portion 222, a first body 242, and a second body 243 connected to each other; the first main body 242 and the second main body 243 are located on the same plane, and the connecting portion 222 and the first main body 242 have a preset included angle, which is preferably about 90 degrees, so as to facilitate positioning and fixing of the position of the upper end surface of the sealing member 201, for example, when the sealing member 201 is installed, it is ensured that the upper end surface of the sealing member 201 is parallel to the side plate matching surface, and it is ensured that the area of the sealing member 201 attached to the side plate matching surface is large enough; the connection portion 222, the first body 242, and the second body 243 collectively form a structure in which a cross-section is formed in a T shape; the connecting portion 222 is inserted into the base 150, and the second body 243 abuts against the base 150; the first body 242 is spaced apart from the base 150 by a first predetermined distance, and the end of the connecting portion 222 away from the first body 242 is spaced apart from the base 150 by a second predetermined distance.

The base 150 is provided with a matching part which is matched with the connecting part 222 in an inserting way; or the upper cover 110 is provided with a matching part which is matched with the connecting part 222 in an inserting way; optionally, the mating portion is a seal groove 231 (i.e., the mating portion is a groove).

The connecting portion 222 at the bottom of the sealing member 201 is inserted into the sealing groove 231, and the groove wall of the sealing groove 231 has a vertical square cross section, but may have a trapezoid cross section. When the sealing member 201 is used, the upper end surface of the sealing member 201 is uniformly attached to the lower end surface of the lower side plate 142. To ensure smooth discharge of air in the gap during compression. Optionally, a communication groove (not shown) is formed on a side wall of the connecting portion 222 of the sealing member 201.

A second predetermined gap h2 is provided between the lower end surface of the connecting portion 222 at the bottom of the seal 201 and the bottom of the seal groove 231, and this gap ensures that the seal 201 does not accumulate or become incompressible during the pressure-tight sealing of the seal 201.

A first predetermined gap h1 is provided between the lower end surface of the first body 242 and the upper end surface of the base 150 at the outer edge of the sealing member 201, and this gap ensures that the sealing member 201 does not accumulate or become incompressible when the sealing member 201 is pressure sealed.

As can also be seen in fig. 7, the lower end surface of the second body 243 at the inner edge of the sealing member 201 is flush with the upper end surface of the base 150. A second groove 255 is provided on the mating surface between the lower end surface of the second body 243 at the inner edge of the sealing member 201 and the upper end surface of the base 150, and the second groove 255 is preferably provided on the upper end surface of the base 150. The second groove 255 can avoid the problem that the transverse area of the sealing member 201 is too large, and the compression deformation amount cannot be transmitted, so that the sealing performance is reduced. It is understood that the second groove 255 may be disposed on the second body 243.

It is understood that, in other embodiments, the connecting portion 222 may be inserted into the lower side plate 142, and the second main body 243 abuts against the lower side plate 142; the first body 242 and the lower plate 142 have a first predetermined distance therebetween, and the end of the connecting portion 222 away from the first body 242 and the lower plate 142 have a second predetermined distance therebetween.

Embodiments of the present invention also provide an evacuated tire mold 20 that includes any of the sealing devices 200 described above.

The vacuum-pumping tire mold 20 comprising the sealing device 200 provided by the embodiment of the invention has at least the following beneficial effects:

1. the sealing range is enlarged by adjusting the sealing element 201 to the end part of the base 150 at the radial inner side; meanwhile, the sealing element 201 can seal bolt holes, exhaust lines and the like.

2. Need not to reprocess new die cavity, use original die cavity to carry out simple transformation, process the mounting groove and set up sealing member 201, can realize the evacuation, reduce the mould cost.

3. By adopting the sealing device 200, the non-vacuumizing cavity is vacuumized without being transformed, and the transformation workload of the non-vacuumizing cavity is reduced.

4. The machine tool is lathing, and the efficiency is improved.

5. Compared with the related art, the sealing effect is remarkably improved.

6. The clearance or the groove structure that sealing member 201 and cooperation face have can avoid sealing member 201 when using, and the cooperation face can't closely cooperate.

7. The area of the upper part of the sealing element 201 is large, and good sealing effect on a hoisting hole, an exhaust hole 270 and the like of the die can be achieved.

Referring to fig. 8-11, as a preferred embodiment, a first protrusion 260 facing the lower side plate 142 is further disposed at a radially inner end of the base 150; the sealing member 201 is disposed on a surface of the first projection 260 adjacent to the lower side plate 142. It is understood that the first protrusion 260 may also be an end portion disposed at a radially inner side of the upper cover 110, and the first protrusion 260 faces the upper side plate 141.

Optionally, in one embodiment, the seal 201 includes a connecting portion 222, a first body 242, and a second body 243 connected to each other; the first body 242 and the second body 243 are located on the same plane, and the connecting portion 222 and the first body 242 have a preset included angle; the connecting portion 222, the first body 242 and the second body 243 together form a T-shaped structure; the connecting portion 222 is inserted on the first projection 260, and the second body 243 abuts against the first projection 260; the first body 242 and the first protrusion 260 have a first predetermined distance, and the end of the connecting portion 222 away from the first body 242 and the first protrusion 260 have a second predetermined distance.

Optionally, in one embodiment, the seal 201 includes a main body 221 and a connecting portion 222; the connecting part 222 is arranged at the end part of the main body 221 in the length direction, and the connecting part 222 and the main body 221 form a preset included angle; the first groove 211 is provided on the main body 221; the first protrusion 260 is provided with a first step 230, and the connection portion 222 is inserted into the first step 230;

further, the connecting portion 222 is located at one end of the main body 221 near the inner side of the first protrusion 260; or the connection portion 222 is located at an end of the main body 221 away from the inner side of the first protrusion 260.

Optionally, in an embodiment, the sealing member 201 is disposed on the first protrusion 260, and a side of the sealing member 201 facing the first protrusion 260 is provided with a first groove 211.

The first protrusion 260 is arranged to bend the matching surface of the base 150 and the lower side plate 142, so as to form a barrier to the airtight airflow, and the bend can also be used as a limiting structure for the mutual matching of the base 150 and the lower side plate 142. This improves the structural stability of evacuated tire mold 20.

The above partial views (fig. 5-11) all show embodiments of the seal 201 between the lower side plate 142 and the base 150, and the embodiment of the seal 201 between the upper side plate 141 and the upper cover 110 is the same as or similar to the embodiment of the seal 201 between the lower side plate 142 and the base 150.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing device for cooperating with a side panel and a base and/or upper cover of a tire mold to seal the tire mold, comprising:

the sealing device further comprises a sealing element;

the sealing element is arranged on the radial inner side of the base and/or the upper cover, and the sealing element is configured to be positioned on the matching surface of the base and/or the upper cover and the side plate; the seal extends from a radially inner side of the base and/or upper cover to a radially outer side of the base and/or upper cover;

the sealing element is arranged at the end part of the radial inner side of the base and/or the upper cover;

the seal includes a body;

the seal further comprises a connecting portion;

the connecting part is arranged in the length direction of the main body and is provided with a preset included angle with the main body.

2. The sealing device of claim 1, wherein:

the sealing member is arranged on the matching surface, a first groove is arranged on the sealing member, and the first groove preferably faces one side of the matching surface.

3. The sealing device of claim 1, wherein:

the connecting part is arranged at the end part of the main body in the length direction, or the connecting part is arranged in the middle of the main body in the length direction.

4. The sealing device of claim 3, wherein:

at least a portion of the body abuts the base and/or the upper cover.

5. The sealing device of claim 4, wherein:

one side of the sealing element facing the matching surface is provided with a first groove, and the first groove is arranged on the main body.

6. The sealing device of claim 3, wherein:

the body may be divided into a first body and a second body; the connecting part is arranged between the first main body and the second main body;

7. The sealing device of claim 6, wherein:

the first main body and the base and/or the upper cover are provided with a first preset distance, and the connecting part and the base and/or the upper cover are provided with a second preset distance.

8. The sealing device according to any one of claims 3-6, wherein:

the base is provided with a matching part which is in plug-in fit with the connecting part;

or the upper cover is provided with a matching part which is matched with the connecting part in an inserting way.

9. The sealing device of claim 8, wherein:

the matching part is a step or a groove.

10. The sealing device according to any one of claims 1 to 7, wherein:

a first bulge facing the side plate is arranged at the end part of the radial inner side of the base and/or the upper cover;

the sealing member is arranged on the surface of the first protrusion close to the side plate.

11. An evacuation tire mould which characterized in that:

the evacuated tire mold comprising the sealing device of any one of claims 1-10.