CN213593468U - Tire mold and inner hollow tire - Google Patents

Abstract

The utility model relates to a tire mould and interior fretwork tire, in the tire manufacturing process, at first pressfitting second die body on first die body for be formed with the injection mold chamber between second die body, first die body and the mold core; and then injecting the raw material into the injection hole, and exhausting gas in the injection mold cavity by using the exhaust hole so that the raw material is pressed into the injection mold cavity. Because the mold core is provided with the bulge arranged towards the injection mold cavity, the inner side of the tire product formed in the injection mold cavity can correspondingly form an inner hollow structure. After the material is injected, separating the second mold body from the first mold body to perform mold opening operation, wherein the mold core loses the contact force of the second mold body, and the tire product is driven to be ejected out of the first mold body under the elastic force of the elastic piece; finally, the tire product is peeled off from the mold core, so that the tire product can be completely and rapidly demolded. The utility model provides a tire mould embeds active state's mold core realizes interior fretwork tire fast demoulding.

Description

Tire mold and inner hollow tire

Technical Field

The utility model relates to a tire technical field especially relates to tire mold and interior fretwork tire.

Background

The rubber injection mold is a common device for manufacturing rubber products, and rubber raw materials are injected into the mold and are vulcanized at high temperature to be manufactured into the rubber products according to the shape of a cavity in the mold. Most of the current production processes are to make solid tires, however, the solid tire material is more expensive, resulting in increased cost. At the same time, the processing procedure is also very complicated and time-consuming.

With the higher requirements of people on the style and the characteristics of products at present, a plurality of different types of inner hollow structures are required to be used on the same product. However, in the field of traditional rubber and rubber injection molding, due to the physical properties and materials of rubber, it is difficult to ensure the mold stripping efficiency of products with inner hollow structures, and generally, the mold stripping method for the products is to assemble the products by using components; after assembling, injecting glue to vulcanize and demoulding; finally, the assembly assembled before disassembly is demoulded. The demolding efficiency is extremely low, and the quality of the product is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

Therefore, a tire mold and an inner hollow tire are needed to be provided, so that the inner hollow tire can be rapidly demolded, and the manufacturing efficiency of the tire is improved; and meanwhile, the quality of the tire product is ensured.

A tire mold, comprising: a first mold body; the second mold body can be pressed on the first mold body in an opening mode; the mold core is movably arranged between the first mold body and the second mold body, an injection mold cavity is defined by the mold core, the first mold body and the second mold body, an injection hole communicated with the injection mold cavity is formed in the second mold body, an exhaust hole communicated with the injection mold cavity is formed in the second mold body and/or the first mold body, and a bulge arranged towards the injection mold cavity is formed in the mold core; the elastic piece is arranged between the mold core and the first mold body or the second mold body, and the mold core is in abutting fit with the second mold body under the action of the elastic piece.

In the tire mold, in the tire manufacturing process, the second mold body is firstly pressed on the first mold body, so that an injection mold cavity is formed among the second mold body, the first mold body and the mold core; and then injecting the raw material into the injection hole, and exhausting gas in the injection mold cavity by using the exhaust hole so that the raw material is pressed into the injection mold cavity. Because the mold core is provided with the bulge arranged towards the injection mold cavity, the inner side of the tire product formed in the injection mold cavity can correspondingly form an inner hollow structure. After the material is injected, separating the second mold body from the first mold body to perform mold opening operation, wherein the mold core loses the contact force of the second mold body, and the tire product is driven to be ejected out of the first mold body under the elastic force of the elastic piece; finally, the tire product is peeled off from the mold core, so that the tire product can be completely and rapidly demolded. Therefore, the mold core with the built-in activity state of the tire mold can be used for popping the tire product out of the first mold body by utilizing the elastic force of the elastic part when the mold is released, so that the first mold body and the bulge are prevented from jointly limiting the peeling of the tire product, the inner hollow tire is rapidly released from the mold, and the tire manufacturing efficiency is improved. And meanwhile, the quality of the tire product is ensured.

In one embodiment, a first guide part is arranged on the first mold body, and a second guide part which is matched with the first guide part in a guiding way is arranged on the mold core.

In one embodiment, the first guide portion is a guide groove, and the second guide portion is a guide protrusion, and the guide protrusion is in guide fit with the guide groove.

In one embodiment, a side surface of the guide convex part facing the guide groove is provided with a mounting groove, one end of the elastic element is mounted in the mounting groove, and the other end of the elastic element abuts against a groove wall of the guide groove.

In one embodiment, the number of the protrusions is two or more, and the two or more protrusions are arranged at intervals along the periphery of the mold core.

In one embodiment, a tearing groove is formed in one side of the second mold body, which faces away from the injection mold cavity, and one end of the tearing groove extends to one side of the second mold body, which faces the first mold body.

In one embodiment, the space size of the injection mold cavity is 0.5-0.99 of the volume size of the inner hollow tire.

In one embodiment, the tire mold further comprises a first mold sleeve and a second mold sleeve, the first mold body is arranged on the first mold sleeve, the second mold body is arranged on the second mold sleeve, the second mold sleeve can move close to or away from the first mold sleeve, and a material injection pipe communicated with the injection hole is arranged on the second mold sleeve.

In one embodiment, the tire mold further comprises a guide shaft and a shaft sleeve, the shaft sleeve is mounted on the first mold sleeve, one end of the guide shaft is mounted on the second mold sleeve, and the other end of the guide shaft is sleeved in the shaft sleeve.

A tire manufacturing process, which adopts the tire mold, comprises the following steps: pressing a second mold body on the first mold body, so that an injection mold cavity is formed among the first mold body, the second mold body and the mold core, wherein the volume of the hollow tire within the space size of the injection mold cavity is reduced according to a preset proportion to obtain the hollow tire; injecting a raw material into the injection hole so that the raw material is pressed into the injection mold cavity; after the material is injected, separating the second die body from the first die body; and pushing the tire product out of the first mold body together with the mold core by using an elastic piece, and stripping the tire product from the mold core.

In the tire manufacturing process, the tire mold is adopted, and in the tire manufacturing process, the second mold body is firstly pressed on the first mold body, so that an injection mold cavity is formed among the second mold body, the first mold body and the mold core; and then injecting the raw material into the injection hole, and exhausting gas in the injection mold cavity by using the exhaust hole so that the raw material is pressed into the injection mold cavity. Because the mold core is provided with the bulge arranged towards the injection mold cavity, the inner side of the tire product formed in the injection mold cavity can correspondingly form an inner hollow structure. After the material is injected, separating the second mold body from the first mold body to perform mold opening operation, wherein the mold core loses the contact force of the second mold body, and the tire product is driven to be ejected out of the first mold body under the elastic force of the elastic piece; finally, the tire product is peeled off from the mold core, so that the tire product can be completely and rapidly demolded. Therefore, the mold core with the built-in activity state of the tire mold can be used for popping the tire product out of the first mold body by utilizing the elastic force of the elastic part when the mold is released, so that the first mold body and the bulge are prevented from jointly limiting the peeling of the tire product, the inner hollow tire is rapidly released from the mold, and the tire manufacturing efficiency is improved. And meanwhile, the quality of the tire product is ensured. In addition, according to the tire manufacturing process, the volume of the hollow tire within the space size of the injection mold cavity is reduced and set in an equal proportion according to a preset proportion, so that the volume of a tire product in the injection mold cavity is smaller than the actual volume of the inner hollow tire. When the tire product is separated from the injection mold cavity, the self volume of the tire product is enlarged by utilizing the self expansion performance of the material, so that the volume of the tire product reaches the size required by a user. Simultaneously, the expanded tire product is separated from the mold core to a certain extent, so that the demolding of the inner hollow tire is more efficient and convenient.

The inner hollow tire is prepared by adopting the tire mold.

According to the inner hollow tire, the tire mold is adopted, and in the tire manufacturing process, the second mold body is firstly pressed on the first mold body, so that an injection mold cavity is formed among the second mold body, the first mold body and the mold core; and then injecting the raw material into the injection hole, and exhausting gas in the injection mold cavity by using the exhaust hole so that the raw material is pressed into the injection mold cavity. Because the mold core is provided with the bulge arranged towards the injection mold cavity, the inner side of the tire product formed in the injection mold cavity can correspondingly form an inner hollow structure. After the material is injected, separating the second mold body from the first mold body to perform mold opening operation, wherein the mold core loses the contact force of the second mold body, and the tire product is driven to be ejected out of the first mold body under the elastic force of the elastic piece; finally, the tire product is peeled off from the mold core, so that the tire product can be completely and rapidly demolded. Therefore, the mold core with the built-in activity state of the tire mold can be used for popping the tire product out of the first mold body by utilizing the elastic force of the elastic part when the mold is released, so that the first mold body and the bulge are prevented from jointly limiting the peeling of the tire product, the inner hollow tire is rapidly released from the mold, and the tire manufacturing efficiency is improved. And meanwhile, the quality of the tire product is ensured. In addition, according to the tire manufacturing process, the volume of the hollow tire within the space size of the injection mold cavity is reduced and set in an equal proportion according to a preset proportion, so that the volume of a tire product in the injection mold cavity is smaller than the actual volume of the inner hollow tire. When the tire product is separated from the injection mold cavity, the self volume of the tire product is enlarged by utilizing the self expansion performance of the material, so that the volume of the tire product reaches the size required by a user. Simultaneously, the expanded tire product is separated from the mold core to a certain extent, so that the demolding of the inner hollow tire is more efficient and convenient.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a tire mold configuration according to one embodiment;

FIG. 2 is a cross-sectional view of a tire mold structure according to one embodiment;

FIG. 3 is a sectional view of a tire mold structure according to an embodiment;

FIG. 4 is a flow chart illustrating the manufacture of an inner hollow tire according to one embodiment.

100. A tire mold; 110. a first mold body; 111. a first guide portion; 1111. a guide groove; 120. a second mold body; 121. an injection hole; 122. an exhaust hole; 123. a material tearing groove; 130. a mold core; 131. a protrusion; 132. a second guide portion; 1321. a guide projection; 133. mounting grooves; 134. a guide bar; 140. an elastic member; 150. a first die sleeve; 160. a second die sleeve; 161. a material injection pipe; 170. a shaft sleeve; 180. a guide shaft; 190. an injection mold cavity; 200. a tire article.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In one embodiment, referring to fig. 1 and 3, a tire mold 100, the tire mold 100 includes: a first mold body 110, a second mold body 120, a core 130, and a resilient member 140. The second mold body 120 may be openably press-fit onto the first mold body 110. The mold core 130 is movably disposed between the first mold body 110 and the second mold body 120, and an injection mold cavity 190 is defined by the mold core 130, the first mold body 110, and the second mold body 120. The second mold body 120 is provided with an injection hole 121 communicating with the injection mold cavity 190. The second mold body 120 and/or the first mold body 110 may be provided with vent holes 122 in communication with an injection mold cavity 190. The mold core 130 is provided with a protrusion 131 disposed toward the injection mold cavity 190. The elastic member 140 is disposed between the core 130 and the first mold body 110 or the second mold body 120. The core 130 is in interference fit with the second mold body 120 under the action of the elastic member 140.

In the tire mold 100, during the tire manufacturing process, the second mold body 120 is firstly pressed on the first mold body 110, so that an injection mold cavity 190 is formed among the second mold body 120, the first mold body 110 and the mold core 130; then, the raw material is injected into the injection hole 121, and the gas in the injection cavity 190 is exhausted by the exhaust hole 122, so that the raw material is pressed into the injection cavity 190. Because the mold core 130 is provided with the protrusion 131 facing the inside of the injection mold cavity 190, the inner side of the tire product 200 formed in the injection mold cavity 190 will form an inner hollow structure accordingly. After the material is injected, the second mold body 120 is separated from the first mold body 110 to perform a mold opening operation, at this time, the mold core 130 loses the abutting force of the second mold body 120, and under the elastic force of the elastic member 140, the tire product 200 is driven to be ejected out of the first mold body 110 together; finally, the tire product 200 is peeled away from the mold core 130 so that the tire product 200 can be completely and quickly released from the mold. Therefore, the tire mold 100 of the present embodiment has the movable mold core 130 built therein, and the elastic force of the elastic member 140 is utilized to eject the tire product 200 out of the first mold body 110 during demolding, so as to prevent the first mold body 110 and the protrusion 131 from jointly limiting the peeling of the tire product 200, thereby realizing rapid demolding of the inner hollow tire, and facilitating improvement of the tire manufacturing efficiency. While also ensuring the quality of the tire product 200.

It should be noted that the press-fit engagement of the second mold body 120 with the first mold body 110 is understood to be: the second mold body 120 conforms to the parting plane between the first mold body 110. Meanwhile, under the action of external force, such as an air cylinder, a hydraulic cylinder, an electric cylinder and other devices, the second mold body 120 can be tightly pressed on the first mold body 110, so that a large amount of burrs are prevented from being generated between the parting surfaces of the first mold body and the second mold body in the injection molding process. In addition, the specific position and the specific size of the exhaust hole 122 are not limited in this embodiment, and only the requirement of realizing effective exhaust and slag discharge functions under the condition of ensuring a certain pressure maintaining effect in the injection mold cavity 190 is met.

It should be further noted that the inner hollow tire is a tire with a groove structure on a side surface facing the hub, and the specific structure can refer to fig. 2. In this embodiment, the mold core 130 is provided with a protrusion 131, and when the raw material is pressed into the injection mold cavity 190, the protrusion 131 leaves a corresponding groove structure on the tire product 200 to form a hollow-out tire product. Wherein, the distinction between tire goods 200 and interior fretwork tire is: the tire product 200 is an intermediate product obtained by pressing raw materials into an injection mold cavity; the inner hollow tire is a product obtained by peeling the tire product 200 from the mold core 130 and performing predetermined processing steps, such as flash removal, vulcanization curing, uniformity testing, and the like.

Alternatively, the elastic member 140 is a spring or an elastic metal sheet, etc.

Further, referring to fig. 3, the first mold body 110 is provided with a first guiding portion 111. The mold core 130 is provided with a second guide portion 132 which is in guiding engagement with the first guide portion 111. When the second body 120 is press-fit onto the first body 110, the second body 120 presses down on the core 130, such that the core 130 moves toward the first body 110. In the moving process, the mold core 130 is guided and matched with the first guide part 111 through the second guide part 132, and is smoothly drawn to the first mold body 110, so that the mold closing process of the second mold body 120 and the first mold body 110 becomes smoother, and the problem that the second mold body 120 and the first mold body 110 cannot be closed due to the fact that the mold core 130 moves and shakes is avoided. Meanwhile, when the second mold body 120 is opened, the mold core 130 is ejected out of the first mold body 110 due to the loss of the interference force of the second mold body 120, and during the period, the mold core 130 is still guided and matched with the second guide portion 132 through the first guide portion 111, so that the mold core 130 is stably ejected out of the first mold body 110.

Alternatively, the first guide portion 111 is a groove or hole structure, and the second guide portion 132 is a protrusion structure; alternatively, the first guide portion 111 has a convex structure, and the second guide portion 132 has a groove or hole structure.

Further, referring to fig. 3, the first guide portion 111 is a guide groove 1111. The second guide portion 132 is a guide protrusion 1321. The guide protrusion 1321 is in guide engagement with the guide groove 1111. In the assembling process, the guide protrusion 1321 is arranged in the guide groove 1111, so that the mold core 130 can move up and down in the guide groove 1111, and the mold core 130 is ensured to be ejected out smoothly during demolding.

Specifically, referring to fig. 3, when the second mold body 120 is pressed onto the first mold body 110, the guiding protrusion 1321 is attached to the groove wall of the guiding groove 1111 under the pressing action of the second mold body 120, so that the mold core 130 is tightly fitted to the first mold body 110, and the raw material is prevented from permeating between the mold core 130 and the first mold body 110 during the material injection process.

In order to fit the guide protrusion 1321 to the groove wall of the guide groove 1111, the outer shape of the guide protrusion 1321 may be matched with the outer shape of the guide groove 1111. The shapes of the guiding protrusion 1321 and the guiding groove 1111 are various, and the embodiment is not particularly limited, for example: the guide protrusion 1321 and the guide groove 1111 have a cylindrical shape, a rounded truncated shape, a hemispherical shape, or the like.

In one embodiment, referring to fig. 3, a side surface of the guiding protrusion 1321 facing the guiding groove 1111 is provided with a mounting groove 133. One end of the elastic member 140 is fitted into the mounting groove 133. The other end of the elastic member 140 abuts on the wall of the guide groove 1111. As can be seen, when the second body 120 and the first body 110 are clamped, the elastic member 140 is compressed between the guide protrusion 1321 and the guide groove 1111; when the second mold body 120 and the first mold body 110 are opened, the elastic member 140 pushes the guiding protrusion 1321 out by an elastic force, so that the mold core 130 is ejected out of the first mold body 110. Meanwhile, in the present embodiment, the guide convex portion 1321 is provided with the mounting groove 133 for the purpose of: firstly, the elastic member 140 can be stably installed; secondly, when the elastic member 140 is compressed, the elastic member can be retracted into the mounting groove 133, so that the guiding protrusion 1321 can be attached to the groove wall of the guiding groove 1111, and good air tightness between the mold core 130 and the first mold body 110 is ensured during mold closing.

Further, referring to fig. 3, the mounting groove 133 extends around the center of the mold core 130, and a guide rod 134 is formed on the guide protrusion 1321, the elastic member 140 is a spring, the spring is sleeved on the guide rod 134, and one end of the spring abuts against a groove wall of the guide groove 1111, so that the spring is sleeved on the guide rod 134, and the spring is more stably extended and retracted.

In one embodiment, referring to fig. 2, there are more than two protrusions 131. The two or more protrusions 131 are arranged at intervals along the periphery of the mold core 130, so that the tire product 200 in the injection mold cavity 190 has two or more hollow-out structures, thereby meeting the structural requirements of users on the tire.

In one embodiment, referring to FIG. 1, a tear groove 123 is formed in a side of the second mold block 120 facing away from the injection mold cavity 190. The tear groove 123 extends at one end to a side of the second die body 120 facing the first die body 110. Therefore, in the embodiment, the tearing groove 123 is arranged at the periphery of the second mold body 120, so that an operator can conveniently take the tearing groove 123 as a cutting opening for peeling off the tire product 200, the tire product 200 can be separated from the mold core 130 more quickly, and the manufacturing efficiency of the tire is further improved. In other embodiments, the tear groove 123 may be disposed on the first mold block 110.

In one embodiment, referring to fig. 3, the size of the injection mold cavity 190 is 0.5-0.99 of the volume of the hollow tire. Therefore, in the manufacturing process of the tire mold 100, the size of the space of the injection mold cavity 190 is reasonably controlled, so that the space of the injection mold cavity 190 is reduced according to the volume of the hollow tire in a certain proportion, and the size of the tire product 200 in the injection mold cavity 190 is smaller than the required size. When the tire product 200 is touched, the tire product 200 automatically compensates for the size difference by using the expansion property of the material itself, so that the size of the tire product 200 after being touched conforms to the desired size range. Meanwhile, after the tire product 200 expands, the tire product 200 is separated from the mold core 130 to a certain extent, so that the tire product 200 is more easily peeled off from the mold core 130, and the mold release rate of the tire product 200 is increased.

It should be noted that, to achieve the isometric reduction of the space of the injection mold cavity 190, the sizes of the first mold body 110, the second mold body 120, and the mold core 130 may be reduced in an isometric ratio of 0.5 to 0.99. Wherein the reduction ratio parameter of 0.5-0.99 is determined mainly by the expansion coefficient of the injected material.

Specifically, the injection raw material is a rubber foaming material.

In one embodiment, referring to fig. 1, the tire mold 100 further includes a first mold 150 and a second mold 160. The first mold body 110 is mounted on a first mold sleeve 150. The second mold body 120 is mounted on a second mold sleeve 160, the second mold sleeve 160 can move close to or away from the first mold sleeve 150, and a material injection pipe 161 communicated with the injection hole 121 is arranged on the second mold sleeve 160. Therefore, when the mold is closed, the second mold sleeve 160 is driven to drive the second mold body 120 to move toward the first mold sleeve 150, so that the second mold body 120 is pressed on the first mold body 110; when the mold is opened, the second mold sleeve 160 is also driven to move the second mold body 120 away from the first mold sleeve 150, so that the second mold body 120 is separated from the first mold body 110. In addition, in the injection, the raw material is injected into the injection pipe 161 so that the raw material flows between the second die case 160 and the second die body 120; and then flows into the injection mold cavity 190 from the injection hole 121 to complete the injection of the raw material.

Further, referring to fig. 1, the tire mold 100 further includes a guiding shaft 180 and a shaft sleeve 170, the shaft sleeve 170 is mounted on the first mold sleeve 150, one end of the guiding shaft 180 is mounted on the second mold sleeve 160, and the other end of the guiding shaft 180 is sleeved in the shaft sleeve 170.

In one embodiment, referring to fig. 1 and 4, a tire manufacturing process employs the tire mold 100 of any of the above embodiments. The method comprises the following steps:

s10, pressing the second mold body 120 on the first mold body 110 to form an injection mold cavity 190 among the first mold body 110, the second mold body 120 and the mold core 130, wherein the volume of the hollow tire within the space size of the injection mold cavity 190 is reduced according to a preset proportion to obtain the hollow tire;

s20, injecting the raw material into the injection hole 121, so that the raw material is pressed into the injection mold cavity 190;

s30, separating the second die body 120 from the first die body 110 after material injection;

s40, the elastic member 140 is used to push the tire product 200 out of the first mold body 110 together with the mold core 130, and the tire product 200 is peeled off from the mold core 130.

In the tire manufacturing process, by using the tire mold 100, in the tire manufacturing process, the second mold body 120 is firstly pressed on the first mold body 110, so that an injection mold cavity 190 is formed among the second mold body 120, the first mold body 110 and the mold core 130; then, the raw material is injected into the injection hole 121, and the gas in the injection cavity 190 is exhausted by the exhaust hole 122, so that the raw material is pressed into the injection cavity 190. Because the mold core 130 is provided with the protrusion 131 facing the inside of the injection mold cavity 190, the inner side of the tire product 200 formed in the injection mold cavity 190 will form an inner hollow structure accordingly. After the material is injected, the second mold body 120 is separated from the first mold body 110 to perform a mold opening operation, at this time, the mold core 130 loses the abutting force of the second mold body 120, and under the elastic force of the elastic member 140, the tire product 200 is driven to be ejected out of the first mold body 110 together; finally, the tire product 200 is peeled away from the mold core 130 so that the tire product 200 can be completely and quickly released from the mold. Therefore, the tire mold 100 of the present embodiment has the movable mold core 130 built therein, and the elastic force of the elastic member 140 is utilized to eject the tire product 200 out of the first mold body 110 during demolding, so as to prevent the first mold body 110 and the protrusion 131 from jointly limiting the peeling of the tire product 200, thereby realizing rapid demolding of the inner hollow tire, and facilitating improvement of the tire manufacturing efficiency. While also ensuring the quality of the tire product 200. In addition, according to the tire manufacturing process, the volume of the hollow tire within the space size of the injection mold cavity 190 is reduced and set in an equal proportion according to a preset proportion, so that the volume of the tire product 200 in the injection mold cavity 190 is smaller than the actual volume of the hollow tire. When the tire product 200 leaves the injection mold cavity 190, the self-expansion property of the material is utilized to expand the volume of the tire product 200, so that the volume of the tire product 200 reaches the size required by a user. Meanwhile, the expanded tire product 200 is separated from the mold core 130 to a certain extent, so that the demolding of the inner hollow tire is more efficient and convenient.

Specifically, the preset proportion of the injection mold cavity 190 is 0.5-0.99.

In one embodiment, referring to fig. 1 and 2, an inner hollow tire is prepared by using the tire mold 100 of the above embodiment.

In the tire manufacturing process, by using the tire mold 100, the second mold body 120 is firstly pressed on the first mold body 110, so that an injection mold cavity 190 is formed among the second mold body 120, the first mold body 110 and the mold core 130; then, the raw material is injected into the injection hole 121, and the gas in the injection cavity 190 is exhausted by the exhaust hole 122, so that the raw material is pressed into the injection cavity 190. Because the mold core 130 is provided with the protrusion 131 facing the inside of the injection mold cavity 190, the inner side of the tire product 200 formed in the injection mold cavity 190 will form an inner hollow structure accordingly. After the material is injected, the second mold body 120 is separated from the first mold body 110 to perform a mold opening operation, at this time, the mold core 130 loses the abutting force of the second mold body 120, and under the elastic force of the elastic member 140, the tire product 200 is driven to be ejected out of the first mold body 110 together; finally, the tire product 200 is peeled away from the mold core 130 so that the tire product 200 can be completely and quickly released from the mold. Therefore, the tire mold 100 of the present embodiment has the movable mold core 130 built therein, and the elastic force of the elastic member 140 is utilized to eject the tire product 200 out of the first mold body 110 during demolding, so as to prevent the first mold body 110 and the protrusion 131 from jointly limiting the peeling of the tire product 200, thereby realizing rapid demolding of the inner hollow tire, and facilitating improvement of the tire manufacturing efficiency. While also ensuring the quality of the tire product 200. In addition, according to the tire manufacturing process, the volume of the hollow tire within the space size of the injection mold cavity 190 is reduced and set in an equal proportion according to a preset proportion, so that the volume of the tire product 200 in the injection mold cavity 190 is smaller than the actual volume of the hollow tire. When the tire product 200 leaves the injection mold cavity 190, the self-expansion property of the material is utilized to expand the volume of the tire product 200, so that the volume of the tire product 200 reaches the size required by a user. Meanwhile, the expanded tire product 200 is separated from the mold core 130 to a certain extent, so that the demolding of the inner hollow tire is more efficient and convenient.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (10)

1. A tire mold, comprising:

a first mold body;

the second mold body can be pressed on the first mold body in an opening mode;

the mold core is movably arranged between the first mold body and the second mold body, an injection mold cavity is defined by the mold core, the first mold body and the second mold body, an injection hole communicated with the injection mold cavity is formed in the second mold body, an exhaust hole communicated with the injection mold cavity is formed in the second mold body and/or the first mold body, and a bulge arranged towards the injection mold cavity is formed in the mold core;

the elastic piece is arranged between the mold core and the first mold body or the second mold body, and the mold core is in abutting fit with the second mold body under the action of the elastic piece.

2. The tire mold of claim 1, wherein the first mold body is provided with a first guide portion, and the mold core is provided with a second guide portion in guiding engagement with the first guide portion.

3. A tyre mould as claimed in claim 2, characterized in that the first guide portion is a guide groove and the second guide portion is a guide projection which is in guiding engagement with the guide groove.

4. The tire mold of claim 3, wherein a side surface of the guide protrusion facing the guide groove is provided with a mounting groove, one end of the elastic member is fitted into the mounting groove, and the other end of the elastic member abuts against a groove wall of the guide groove.

5. The tire mold of claim 1, wherein the protrusions are two or more, the two or more protrusions being spaced apart along the periphery of the core.

6. The tire mold of claim 1, wherein a tear groove is provided on a side of the second mold body facing away from the injection mold cavity, and an end of the tear groove extends to a side of the second mold body facing the first mold body.

7. The tire mold of any one of claims 1-6, wherein the injection mold cavity has a spatial dimension of 0.5 to 0.99 of the volume dimension of the inner hollow tire.

8. The tire mold according to any one of claims 1 to 6, further comprising a first mold sleeve and a second mold sleeve, wherein the first mold body is mounted on the first mold sleeve, the second mold body is mounted on the second mold sleeve, the second mold sleeve can move close to or away from the first mold sleeve, and the second mold sleeve is provided with a material injection pipe communicated with the injection hole.

9. The tire mold of claim 8, further comprising a guide shaft and a shaft sleeve, wherein the shaft sleeve is mounted on the first mold sleeve, one end of the guide shaft is mounted on the second mold sleeve, and the other end of the guide shaft is mounted in the shaft sleeve.

10. An internally hollowed-out tire, characterized in that it is produced using a tire mold according to any one of claims 1 to 9.

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