Radial tire vulcanizing mold

Abstract

The utility model provides a radial tire vulcanization mold which comprises an upper mold, a lower mold and a core mold, the core mold is arranged between the upper mold and the lower mold, and the upper mold, the lower mold and the core mold are matched to form a closed tire rubber vulcanization processing area; a plurality of groups of exhaust holes are formed in the upper mold and the lower mold and are communicated with a tire rubber vulcanization processing area; the exhaust mechanism comprises an exhaust pipe and a diaphragm assembly, the exhaust pipe is inserted into the exhaust hole, after exhaust is completed, the diaphragm assembly is assembled in the exhaust pipe, and the diaphragm assembly prevents air flow from flowing back to a tire rubber vulcanization processing area; and the diaphragm assembly deforms under the action of air pressure to push rubber entering the exhaust pipe back to a tire rubber vulcanization processing area. According to the utility model, after the diaphragm assembly body is pressed, the tire rubber body in the exhaust pipe is pushed out of the exhaust pipe, so that rubber material overflow of the tire rubber body at the exhaust pipe is reduced, and the occurrence of adhesion is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of radial tire vulcanization equipment, in particular to a radial tire vulcanization mold. Background Art

[0002] Radial tire vulcanization molds are usually used in the vulcanization molding stage of radial tires. During the processing, the gas in the radial tire vulcanization mold is emptied to allow the rubber to completely fill the mold, thereby reducing the occurrence of incomplete or insufficient rubber filling. However, rubber overflow is prone to occur near the exhaust port, resulting in adhesion and inconvenience in demoulding.

[0003] The prior art uses a booster and a vacuum device to complete the inflation and suction operations into the mold by opening an exhaust hole in the side wall of a radial tire vulcanization mold, thereby reducing the overflow of rubber near the exhaust port. However, the fluidity of the rubber is poor, and a simple inflation airflow will enter the mold along the gap and cannot form an effective thrust in the overflow area, and cannot effectively reduce the occurrence of adhesion. Utility Model Content

[0004] The utility model provides a radial tire vulcanization mold, aiming to solve the problem that due to the poor fluidity of the rubber material, the current simple inflation allows the airflow to enter the mold along the gap and cannot form an effective thrust in the overflow area, and cannot effectively reduce the occurrence of adhesion.

[0005] The utility model is implemented in this way: a radial tire vulcanization mold, comprising:

[0006] An upper mold, a lower mold and a core mold, wherein the core mold is arranged between the upper mold and the lower mold, and the upper mold, the lower mold and the core mold cooperate to form a closed tire colloid vulcanization processing area;

[0007] The upper mold and the lower mold are provided with a plurality of exhaust holes, and the exhaust holes are connected to the tire colloid vulcanization processing area;

[0008] The exhaust mechanism includes an exhaust pipe and a diaphragm assembly. The exhaust pipe is inserted into the exhaust hole from the exhaust hole port. The diaphragm assembly is assembled in the exhaust pipe. The diaphragm assembly prevents the airflow from flowing back to the tire colloid vulcanization processing area. After the exhaust is completed, the diaphragm assembly is deformed under the action of air pressure to push the rubber entering the exhaust pipe back to the tire colloid vulcanization processing area.

[0009] Preferably, the diaphragm assembly comprises an annular diaphragm and a one-way valve, wherein the annular diaphragm is arranged on the annular side of the one-way valve and connected to the inner wall of the exhaust pipe.

[0010] Preferably, the exhaust hole comprises a collecting hole and an air collecting duct, one end of the collecting hole is a stepped countersunk structure and is connected to the tire colloid vulcanization processing area, and the air collecting duct is connected to one end of the collecting hole away from the stepped countersunk structure.

[0011] Preferably, the exhaust pipe comprises a flange and an embedded pipe body, and the flange and the embedded pipe body are inserted into one end of the collecting hole where the countersunk structure is set.

[0012] Preferably, the outer wall of the embedded tube body is provided with a plurality of groups of sealing rings, and the inner wall of the collecting hole is also provided with sealing ring grooves adapted thereto, and the sealing rings are engaged in the sealing ring grooves during the assembly of the exhaust pipe to the exhaust hole.

[0013] Preferably, the flange and the collecting hole are fixed by bolts.

[0014] Preferably, the inner edge of the annular diaphragm is connected to the outer wall of the one-way valve, and the outer edge of the annular diaphragm is connected to the inner wall of the embedded tube.

[0015] Preferably, the annular diaphragm is made of high temperature resistant silicone material.

[0016] Preferably, the tire colloid vulcanization processing area is an upstream area of ​​the one-way valve, and the tire colloid vulcanization processing area flows into the collecting hole and the air collecting duct via the one-way valve.

[0017] Under negative pressure, under the action of the external vacuum device, the collecting hole and the air collecting duct are both in negative pressure state, the one-way valve on the diaphragm assembly is opened in one direction, and the air in the tire colloid vulcanization processing area will enter the collecting hole and the air collecting duct through the one-way valve, completing the extraction of air in the tire colloid vulcanization processing area;

[0018] Under high pressure, the external booster device cooperates with the diaphragm assembly to block, the collecting hole and the air collecting duct are both under high pressure, and the high pressure of the collecting hole and the air collecting duct simultaneously applies air pressure thrust to the side of the diaphragm assembly away from the tire colloid vulcanization processing area, so that the diaphragm assembly pushes the rubber material entering the exhaust pipe out of the exhaust pipe, so that the rubber material returns to the tire colloid vulcanization processing area;

[0019] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0020] The one-way valve in the exhaust mechanism of the radial tire vulcanization mold provided by the utility model allows the gas in the tire colloid vulcanization processing area to pass through the exhaust mechanism, and the gas in the tire colloid vulcanization processing area can be discharged immediately in cooperation with the vacuum extraction equipment. After the exhaust is completed, high-pressure gas is introduced into the exhaust hole through the external air intake equipment, and the one-way valve on the diaphragm assembly prevents the gas from flowing back to the tire colloid vulcanization processing area; after the air pressure on one side of the diaphragm assembly rises, the diaphragm assembly will be reversely deformed, and the structure formed by the diaphragm assembly body is used to push the tire colloid in the exhaust pipe out of the exhaust pipe, thereby reducing the overflow of rubber material of the tire colloid at the exhaust pipe and reducing the occurrence of adhesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a structural schematic diagram of a radial tire vulcanization mold.

[0022] Figure 2 The utility model provides a schematic diagram of an exhaust mechanism and exhaust hole structure of a radial tire vulcanization mold.

[0023] Figure 3 The utility model provides a schematic diagram of an exhaust mechanism and a collecting hole structure of a radial tire vulcanization mold.

[0024] Figure 4 The utility model is a schematic structural diagram of a central exhaust mechanism of a radial tire vulcanization mold.

[0025] Figure 5 The utility model is a schematic diagram of the structure of a diaphragm assembly of a radial tire vulcanization mold.

[0026] Figure 6 The utility model provides a schematic structural diagram of a diaphragm assembly of a radial tire vulcanization mold subjected to air pressure thrust in a high-pressure state of a collecting hole and an air collecting duct.

[0027] Description of reference numerals:

[0028] 110, upper mold; 120, lower mold; 130, core mold;

[0029] 200, exhaust hole; 210, collecting hole; 220, gas collecting duct;

[0030] 300, exhaust mechanism; 310, exhaust pipe; 311, flange; 312, embedded pipe body; 313, sealing ring; 320, diaphragm assembly; 321, annular diaphragm; 322, one-way valve. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] The utility model embodiment provides a radial tire vulcanization mold, such as Figure 1-Figure 6 As shown, the radial tire vulcanization mold comprises:

[0034] An upper mold 110, a lower mold 120 and a core mold 130, wherein the core mold 130 is disposed between the upper mold 110 and the lower mold 120, and the upper mold 110, the lower mold 120 and the core mold 130 cooperate to form a closed tire colloid vulcanization processing area; the upper mold 110, the lower mold 120 and the core mold 130 have the same structure as the radial tire vulcanization mold in the prior art;

[0035] The upper mold 110 and the lower mold 120 are provided with a plurality of exhaust holes 200, and the exhaust holes 200 are connected to the tire colloid vulcanization processing area; during the vulcanization process, the exhaust holes 200 exhaust the gas in the tire colloid vulcanization processing area, so that the tire colloid fills the entire tire colloid vulcanization processing area, reducing the occurrence of insufficient rubber. The exhaust holes 200 are connected to a vacuum pumping device through a pipeline, and the vacuum pumping device is used to exhaust the gas inside the exhaust holes 200;

[0036] The exhaust mechanism 300 includes an exhaust pipe 310 and a diaphragm assembly 320. The exhaust pipe 310 is inserted into the exhaust hole 200 from the exhaust hole 200. The diaphragm assembly 320 is assembled in the exhaust pipe 310. The diaphragm assembly 320 includes an annular diaphragm 321 and a one-way valve 322. The annular diaphragm 321 is arranged on the ring side of the one-way valve 322 and connected to the inner wall of the exhaust pipe 310.

[0037] During the exhaust process, air will pass through the exhaust mechanism 300 from the port of the exhaust hole 200. At this time, the one-way valve 322 in the exhaust mechanism 300 allows the gas in the tire colloid vulcanization processing area to pass through the exhaust mechanism 300. With the vacuum pumping equipment, the gas in the tire colloid vulcanization processing area will be discharged immediately. After the exhaust is completed, high-pressure gas is sent into the exhaust hole 200 through the external air intake equipment, and the one-way valve 322 on the diaphragm assembly 320 will prevent the gas from flowing back to the tire colloid vulcanization processing area. After the air pressure on one side of the diaphragm assembly 320 rises, as shown in FIG. Figure 6 As shown, Figure 6 The direction of the middle arrow is the direction in which the air pressure applies pressure to the annular diaphragm 321. When the annular diaphragm 321 is subjected to pressure opposite to the flow direction of the one-way valve 322, the diaphragm assembly 320 will deform in the reverse direction, pushing the tire colloid in the exhaust pipe 310 out of the exhaust pipe 310, thereby reducing the occurrence of the tire colloid adhering to the exhaust pipe 310.

[0038] The annular diaphragm 321 here is made of high temperature resistant silicone material, and its deformation principle is similar to the working principle of a diaphragm pump. Under the action of the one-way valve 322, a pressure difference is formed on both sides of the annular diaphragm 321, and the deformation of the annular diaphragm 321 is used to complete exhaust filling or air intake and material withdrawal;

[0039] As a preferred implementation in this embodiment, the exhaust hole 200 includes a collecting hole 210 and a gas collecting conduit 220; the gas collecting conduit 220 is connected to a gas tank (not shown in the figure), and the gas tank is respectively connected to a pressurizing device and a vacuum pumping device through pipelines, and the pressurizing device and the vacuum pumping device are alternately operated to form a high pressure or negative pressure environment in the gas tank, respectively, to meet the air intake and exhaust needs of the exhaust hole 200;

[0040] Under high pressure, a high pressure environment is formed in the gas tank. Under the blocking effect of the diaphragm assembly 320, the collecting hole 210 and the gas collecting conduit 220 are both under high pressure. At the same time, a gas pressure thrust is applied to the diaphragm assembly 320, so that the diaphragm assembly 320 pushes the rubber material entering the exhaust pipe 310 out of the exhaust pipe 310.

[0041] In the negative pressure state, a negative pressure environment is formed in the gas tank, the collecting hole 210 and the gas collecting conduit 220 are both in a negative pressure state, the one-way valve 322 on the diaphragm assembly 320 is opened in one direction, and the air in the tire colloid vulcanization processing area will enter the collecting hole 210 and the gas collecting conduit 220 through the one-way valve 322;

[0042] As a preferred implementation in this embodiment, the inner wall of the collecting hole 210 is a stepped countersunk structure, and the exhaust pipe 310 is embedded in the collecting hole 210;

[0043] The exhaust pipe 310 includes a flange 311 and an embedded tube body 312, the flange 311 and the embedded tube body 312 are inserted from the end of the collecting hole 210, the flange 311 and the collecting hole 210 are fixed by bolts, and the exhaust mechanism 300 with a split structure is mainly convenient for replacing the exhaust mechanism 300; the annular diaphragm 321 on the diaphragm assembly 320 in the exhaust mechanism 300 is convenient for replacement and maintenance when it fails during long-term use;

[0044] The outer wall of the embedded tube body 312 is provided with a plurality of sealing rings 313, and the inner wall of the collecting hole 210 is also provided with sealing ring grooves adapted thereto. During the assembly process, the sealing rings 313 are engaged in the sealing ring grooves to enhance the sealing between the exhaust pipe 310 and the collecting hole 210;

[0045] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described action sequence, because according to the utility model, some steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the utility model.

[0046] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A radial tire vulcanization mold, characterized in that: include: An upper mold (110), a lower mold (120) and a core mold (130), wherein the core mold (130) is arranged between the upper mold (110) and the lower mold (120), and the upper mold (110), the lower mold (120) and the core mold (130) cooperate to form a closed tire colloid vulcanization processing area; The upper mold (110) and the lower mold (120) are provided with a plurality of exhaust holes (200), and the exhaust holes (200) are connected to a tire colloid vulcanization processing area; An exhaust mechanism (300) includes an exhaust pipe (310) and a diaphragm assembly (320). The exhaust pipe (310) is inserted into the exhaust hole (200) from the exhaust hole (200) port. The diaphragm assembly (320) is assembled in the exhaust pipe (310). The diaphragm assembly (320) prevents airflow from flowing back to the tire colloid vulcanization processing area. After the exhaust is completed, the diaphragm assembly (320) is deformed under the action of air pressure to push the rubber entering the exhaust pipe (310) back to the tire colloid vulcanization processing area.

2. A radial tire vulcanization mold according to claim 1, characterized in that: The diaphragm assembly (320) comprises an annular diaphragm (321) and a one-way valve (322); the annular diaphragm (321) is arranged on the annular side of the one-way valve (322) and is connected to the inner wall of the exhaust pipe (310).

3. A radial tire vulcanization mold according to claim 2, characterized in that: The exhaust hole (200) comprises a collecting hole (210) and an air collecting duct (220); one end of the collecting hole (210) is a stepped countersunk hole structure and is connected to a tire colloid vulcanization processing area; the air collecting duct (220) is connected to one end of the collecting hole (210) away from the stepped countersunk hole structure.

4. A radial tire vulcanization mold as claimed in claim 3, characterized in that: The exhaust pipe (310) comprises a flange (311) and an embedded pipe body (312), and the flange (311) and the embedded pipe body (312) are inserted into one end of the collecting hole (210) where a countersunk hole structure is provided.

5. A radial tire vulcanization mold as claimed in claim 4, characterized in that: The outer wall of the embedded tube body (312) is provided with a plurality of groups of sealing rings (313), and the inner wall of the collecting hole (210) is also provided with a sealing ring groove adapted thereto, and the sealing ring (313) is engaged in the sealing ring groove during the process of assembling the exhaust pipe (310) to the exhaust hole (200).

6. A radial tire vulcanization mold as claimed in claim 5, characterized in that: The flange (311) and the collecting hole (210) are fixed by bolts.

7. A radial tire vulcanization mold according to claim 6, characterized in that: The outer edge of the annular diaphragm (321) is connected to the inner wall of the embedded tube body (312).

8. A radial tire vulcanization mold according to claim 7, characterized in that: The inner edge of the annular diaphragm (321) is connected to the outer wall of the one-way valve (322).

9. A radial tire vulcanization mold according to claim 8, characterized in that: The air in the tire colloid vulcanization processing area flows into the collection hole (210) and the air collection duct (220) via the one-way valve (322).

Images