Self-positioning negative pressure sealing structure of tire mold

Abstract

The utility model relates to the technical field of tire manufacturing equipment, in particular to a self-positioning negative pressure sealing structure of a tire mold, which comprises a lower sealing plate, a sealing ring and a middle sleeve, a base is arranged on the lower sealing plate, the sealing ring is provided with an air exhaust hole, the lower sealing plate and the sealing ring are sealed through a sealing rubber sleeve, a guide piece and a sealing piece are arranged below the middle sleeve, and the middle sleeve is provided with an air exhaust hole. A sliding block assembly is arranged in the middle sleeve. The self-positioning negative pressure sealing structure of the tire mold is used for tire production in a negative pressure state, can realize self-positioning sealing of the lower part of the tire mold, can effectively prolong the service life of a sealing piece, is simple in structure and convenient to disassemble, improves the production efficiency and the product quality, and reduces the production cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire manufacturing equipment technical field especially relates to a tire mould self -positioning negative pressure sealing structure. BACKGROUND

[0002] The tire tread pattern part is the important component of tire, and the more beautiful its surface is, the more the consumers will like it, and all tire manufacturers are striving to improve the research of tire tread pattern beauty degree.

[0003] In order to improve the surface quality of tire, all are striving to research vacuum tire mould, which has strict requirements for the repeat positioning accuracy of mould and the service life of sealing ring, and there is no relatively mature solution at present.

[0004] The existing tire mould is eccentric when opening and closing due to the poor precision of vulcanizing machine, which can squeeze the sealing element, cause poor vacuum effect of mould and short service life of sealing element, and accordingly increase labor intensity and production cost. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a tire mould self-positioning negative pressure sealing structure, which can realize accurate positioning and achieve negative pressure sealing effect before the mould is completely closed, and can perform negative pressure vacuum operation on the mould through the air extraction hole.

[0006] In order to solve the above technical problems, the utility model provides a tire mould self-positioning negative pressure sealing structure, which comprises a lower sealing plate, a sealing ring and a middle sleeve.

[0007] After the above structure is adopted, the remaining part of the mould can be accurately positioned when the sealing element reaches the working state, so that the sealing element can not be abnormally squeezed, the service life of the sealing element can be maximized, the mould can reach the negative pressure vacuum condition, and the production efficiency is greatly improved.

[0008] Preferably, the sealing ring is arranged on the upper part or the outer part of the lower sealing plate, and the sealing ring is free from the lower sealing plate.

[0009] Preferably, the lower sealing plate is fixedly connected with the base or the lower sealing plate and the base are integrated.

[0010] Preferably, the sealing rubber sleeve is arranged between the lower sealing plate and the sealing ring; and the sealing rubber sleeve is made of rubber.

[0011] Preferably, the air extraction hole is arranged on the outer side of the sealing ring.

[0012] Preferably, the outer circle diameter of the guide part is greater than the outer circle diameter of the middle sleeve; the guide part is fixedly connected with the outer circle of the middle sleeve; the guide part is in a whole circle structure; the guide part is in a segmented structure, and the number of the guide part is greater than or equal to 2; and the material of the guide part is copper, alloy, graphite or polytetrafluoroethylene.

[0013] Preferably, the sealing part is arranged on the outer circle of the middle sleeve or the inner hole of the sealing ring; and the number of the sealing part is greater than or equal to 2.

[0014] In conclusion, the tire mold self-positioning negative pressure sealing structure can guarantee the vulcanization of the tire under the vacuum negative pressure state, has the advantages of simple sealing structure, low manufacturing cost, and is suitable for all tire live molds, saves the cost and greatly increases the enterprise benefits. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 is a schematic view of a tire mold self-positioning negative pressure sealing structure according to the present application;

[0016] Figure 2 Fig. 2 is an enlarged view of the part A in Fig. 1; Figure 1

[0017] Fig. 1 is a schematic view of a tire mold self-positioning negative pressure sealing structure according to the present application; DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in combination with specific embodiments.

[0019] ​In the description of the utility model, it needs to explain, the term "upper", "lower", "internal", "external" "front end", "rear end", "both ends", "one end", "the other end" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, construct and operate with a particular orientation, therefore cannot be understood as the limitation of the utility model. In addition, the term "first", "second" is only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the utility model, it needs to explain, unless otherwise explicitly provided and limited, the term "installation", "set with", "connection" and so on, should be broad understanding, for example "connection", can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. Embodiment

[0021] Reference Figures 1 to 2 As shown in the utility model provides a technical scheme:

[0022] A tire mold self-positioning negative pressure sealing structure, including lower sealing plate 1, seal ring 6 and middle sleeve 9, the lower sealing plate 1 is equipped with base 2, the seal ring is equipped with suction hole 5, the lower sealing plate 1 and seal ring 6 are sealed via sealing rubber sleeve 4, the middle sleeve 9 is equipped with guide 7 and sealing element 8, and the middle sleeve 9 is equipped with sliding block assembly 3.

[0023] In the embodiment, the seal ring 6 is placed on the upper part or the outside of the lower sealing plate 1, and the seal ring 6 and the lower sealing plate 1 are kept free to move;The lower sealing plate 1 is fixedly connected with the base 2 or the lower sealing plate 1 and the base 2 are integrated;The sealing rubber sleeve 4 is placed between the lower sealing plate 1 and the seal ring 6;The material of the sealing rubber sleeve 4 is rubber;The suction hole 5 is placed on the outer side of the seal ring 6;The outer diameter of the guide 7 is greater than the outer diameter of the middle sleeve 9;The guide 7 is fixedly connected to the outer circle of the middle sleeve 9;The guide 7 is a whole circle structure;The guide 7 is a segmented structure, and the number is greater than or equal to 2;The material of the guide 7 is copper, alloy, graphite or polytetrafluoroethylene;The sealing element 8 is placed on the outer circle of the middle sleeve 9 or the inner hole of the seal ring 6;The number of the sealing element 8 is greater than or equal to 2.

[0024] It should be noted that the tire mold self-positioning negative pressure sealing structure acts as follows: the lower sealing plate 1 is fixedly connected to the base 2, the sealing ring 6 is floatingly connected to the lower sealing plate 1, the sealing ring 6 and the lower sealing plate 1 are sealed by the sealing rubber sleeve 4, at this time the sealing ring 6 can freely move on the lower sealing plate 1, the middle sleeve 9 is fixedly connected to the vulcanizing machine, when the vulcanizing machine drives the middle sleeve 9 to fall, the guide piece first contacts the inner hole of the sealing ring 6, at this time the sealing ring 6 will automatically reach the concentric state with the middle sleeve 9, then the middle sleeve 9 continues to fall, the sealing piece 8 will contact the inner hole of the sealing ring 6, at this time the middle sleeve 9, the sealing ring 6 and the lower sealing plate 1 can reach the negative pressure vacuum state, at this time the middle sleeve stops falling, the vacuum pump starts to perform the vacuumizing operation on the inner cavity of the mold through the air outlet hole 5, when the negative pressure in the cavity reaches the requirement, the middle sleeve 9 drives the sliding block assembly 3 to continue to fall to the mold closing state, then the tire is vulcanized.

[0025] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by the person skilled in the art that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only for illustrating the principle of the utility model, under the premise of not departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed for protection. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A self-locating negative pressure seal for a tire mold, comprising: It comprises a lower sealing plate (1), a sealing ring (6) and a middle sleeve (9), the lower sealing plate (1) is provided with a base (2), the sealing ring is provided with an air extraction hole (5), the lower sealing plate (1) and the sealing ring (6) are sealed through a sealing rubber sleeve (4), the middle sleeve (9) is provided with a guide piece (7) and a sealing piece (8), and the middle sleeve (9) is provided with a sliding block assembly (3) inside.

2. The self-locating negative pressure seal for a tire mold as set forth in claim 1, wherein: The sealing ring (6) is arranged on the upper part or the outer part of the lower sealing plate (1), and the sealing ring (6) is kept free from the lower sealing plate (1).

3. The self-locating negative pressure seal for a tire mold as set forth in claim 1, wherein: The lower sealing plate (1) is fixedly connected with the base (2) or is an integral structure with the base (2).

4. The self-locating negative pressure seal for a tire mold of claim 1, wherein: The sealing rubber sleeve (4) is arranged between the lower sealing plate (1) and the sealing ring (6), and the material of the sealing rubber sleeve (4) is rubber.

5. The self-locating negative pressure seal for a tire mold of claim 1, wherein: The air extraction hole (5) is arranged on the outer side of the sealing ring (6).

6. The self-locating negative pressure seal for a tire mold of claim 1, wherein: The outer circle diameter of the guide piece (7) is greater than the outer circle diameter of the middle sleeve (9), the guide piece (7) is fixedly connected with the outer circle of the middle sleeve (9), the guide piece (7) is a whole circle structure, the guide piece (7) is a segmented structure and the number of the guide piece (7) is greater than or equal to 2, and the material of the guide piece (7) is copper, alloy, graphite or polytetrafluoroethylene.

7. The self-locating negative pressure seal for a tire mold of claim 1, wherein: The sealing piece (8) is arranged on the outer circle of the middle sleeve (9) or the inner hole of the sealing ring (6), and the number of the sealing piece (8) is greater than or equal to 2.

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