CN216544823U

CN216544823U - Tire bead forming structure of tire for preventing production operation of frictioning

Info

Publication number: CN216544823U
Application number: CN202123229050.1U
Authority: CN
Inventors: 姜家润
Original assignee: Sichuan Yuanxing Rubber Co Ltd
Current assignee: Sichuan Yuanxing Rubber Co Ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-05-17
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses a tire bead molding structure of a tire for preventing frictioning production operation, wherein a molding cylinder template is provided with a first surface, a second surface, a third surface and a first annular inclined plane, wherein the first surface and the second surface are opposite up and down; the third surface is an annular surface vertical to the horizontal plane and surrounds the edges of the first surface and the second surface, the third surface is connected with the first surface through a first cambered surface, the third surface is connected with a first annular inclined plane through a circular corner, and the first annular inclined plane is connected with the second surface; the groove surface of the molding capsule is provided with a fourth surface, a second annular inclined surface and a second cambered surface, the fourth surface is connected with the second annular inclined surface, the second annular inclined surface is connected with the second cambered surface, the second cambered surface is connected with the bottom of the groove of the molding capsule, and the matching position of the molding barrel mold sheet and the molding capsule is matched in shape to form fit. The utility model can realize the production of the tire by using the anti-friction rubber, reduce the generation of bad tires and greatly reduce the production and manufacturing cost of the tire.

Description

Tire bead forming structure of tire for preventing production operation of frictioning

Technical Field

The utility model relates to a tire bead molding structure of a tire in anti-frictioning production operation, belongs to the field of tire manufacturing technology, and relates to a molding matrix structure of the tire in anti-frictioning operation and a molding capsule matched with the molding matrix structure.

Background

The main structure of the tire comprises a tire crown, a tire shoulder, a tire side wall and a tire bead, wherein the tire crown is the part of the tire directly contacting with the road surface, the tire side wall is the tire side wall part, the tire shoulder connects the tire crown and the tire side wall, the tire bead is positioned at the lower end of the tire side wall, and the tire bead is matched with a rim.

The basic structure of the tire bead part of the tire is formed by wrapping triangular rubber and steel wire bundles by a cord fabric, anti-friction cloth or anti-friction rubber, sidewall rubber and inner rubber according to a certain position layout.

In the process of building a tire, a tire lip part is often reinforced by using a wiping cloth. The anti-rubbing cloth structure is used, the anti-rubbing cloth needs to be attached to the inner rubber firstly, and the forming operation procedures of the tire are increased; the anti-friction structure can replace the anti-friction cloth, the anti-friction glue can be extruded along with the sidewall glue, the independent gluing step is not needed, and the tire forming operation procedures can be reduced by using the anti-friction glue operation. The molding bladder is a tire molding tool and is used in the tire molding process, and in order to produce the bead part, the molding bladder needs to be matched with the molding barrel mold piece, so that the bead part is molded in a space formed by the molding bladder and the molding barrel mold piece.

A prior art bead molding structure is shown in fig. 1 and 2, and the main components of the bead molding structure are a molding tube mold piece 9 and a molding bladder 14. As shown in fig. 1, the molding tube matrix of the bead molding structure has a first surface 1 and a second surface 8 which are opposite and parallel to each other to form an outer surface and an inner surface of the molding tube matrix; the molding tube matrix is also provided with a first arc surface 2, a third surface 3, a third annular inclined surface 4, a fifth surface 5 and a fourth annular inclined surface 6, wherein the fifth surface 5 is connected with the third annular inclined surface 4 and the fourth annular inclined surface 6, the connection part of the fifth surface 5 and the third and fourth annular inclined surfaces forms a corner which is not a fillet, and the fifth surface 5 and the second surface 8 are generally parallel or nearly parallel. The fourth annular ramp 6 and the second surface 8 join to form an included angle 7 at the junction. As shown in fig. 2, the bead is formed by two layers of cord fabric 17, rubbing rubber 15, sidewall rubber 16, inner rubber 19 and reverse-wrapped apex 18, and the layer structure is conventional, and the molding bladder 14 of the bead molding structure is arranged on the bladder support base 13. The formed capsule needs to be inflated, the inflated formed capsule is provided with a groove which is a bead forming space, the surface of the groove comprises a fourth surface 24 capable of being attached to the second surface 8, a fifth annular inclined surface 23 capable of being attached to the fourth annular inclined surface 6 and a third cambered surface 12 recessed towards the capsule supporting seat, the fourth surface 24 is connected with the upper edge of the fifth annular inclined surface 23, the lower edge of the fifth annular inclined surface 23 is connected with the upper edge of the third cambered surface 12, and the lower edge of the third cambered surface 12 is smoothly connected with the bottom of the groove of the formed capsule 14. A gap 20 exists between the tire lip and the molding tube mold sheet and the molding capsule, and the gap 20 is larger because the distance between the fifth surface 5 and the third cambered surface 12 is larger.

When the tire is formed, one surface of the rubbing gum at the tire lip part is attached to the curtain cloth, the rubbing gum is attached to the curtain cloth more closely compared with the attaching of the rubbing gum and the curtain cloth, if air is left between the rubbing gum and the curtain cloth, the rubbing gum and the curtain cloth are required to be pressed by the forming capsule to discharge the residual air, the tail end of the original forming cylinder mold sheet is provided with a convex part close to the reverse wrapping part of the tire lip, if the rubbing gum operation is used, the convex part can block the forming capsule from pressing the rubbing gum and the curtain cloth when the forming capsule is pressed, the residual air is difficult to discharge, bubbles are easy to generate at the tire lip part, the subsequent processes are difficult to process, the generation of poor products is caused, and the manufacturing cost is greatly increased. Therefore, it is necessary to improve the structure of the original mold sheet to meet the requirement of the production operation using the rubbing-resistant glue.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the defects of the prior art, provides a related technical scheme of a tire bead forming structure of a tire for frictioning production operation, and aims to solve the problem that the tire bead part of the tire for frictioning production operation is easy to generate air bubbles to cause generation of defective products pointed out in the background technology.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a tire bead molding structure of a tire in anti-frictioning production operation comprises a molding cylinder template and a molding capsule, wherein a groove is formed after the molding capsule is inflated, the edge of the molding cylinder template is matched with the groove of the molding capsule to form a tire bead molding space, the molding cylinder template is provided with a first surface, a second surface, a third surface and a first annular inclined plane, and the first surface and the second surface are opposite up and down; the third surface is an annular surface vertical to the horizontal plane and surrounds the edge of the first surface and the edge of the second surface, the upper edge of the third surface is smoothly connected with the edge of the first surface through an arc-shaped first arc surface, the lower edge of the third surface is smoothly connected with the lower edge of the first annular inclined plane through a fillet, and the upper edge of the first annular inclined plane is connected with the edge of the second surface; the groove surface of the molding capsule comprises a fourth surface which can be attached to the second surface, a second annular inclined surface which can be attached to the first annular inclined surface, and a second cambered surface which protrudes towards the bead direction, wherein the fourth surface is connected with the upper edge of the second annular inclined surface, the lower edge of the second annular inclined surface is connected with the upper edge of the second cambered surface, and the lower edge of the second cambered surface is smoothly connected with the bottom of the groove of the molding capsule.

The structure improves the protruding part of the reverse wrapping part at the tail end of the template, solves the problem that the molding capsule cannot be pressed into the rubbing gum and the cord fabric due to the structure of the part, further causes bubbles to appear on the tire bead, leads to poor products, and can be used for production operation by the improved structure.

The third surface and the fillet of the tire lip forming structure of the tire for preventing frictioning production operation are positioned right above the second cambered surface.

The third surface of the tire lip forming structure of the tire for the anti-frictioning production operation forms an included angle of 45-75 degrees with the first annular inclined plane.

Preferably, the third surface of the bead forming structure of the tire for the frictionproof production operation forms an included angle of 50-70 degrees with the first annular inclined surface.

The second surface of the tire lip forming structure of the tire for the anti-frictioning production operation forms an included angle of 135-165 degrees with the first annular inclined plane.

Preferably, the second surface of the bead forming structure of the tire for the frictionproof production operation forms an included angle of 140-160 degrees with the first annular inclined plane.

According to the tire bead forming structure of the tire for the anti-frictioning production operation, the first surface and the second surface are both circular surfaces and are parallel surfaces, and the diameter of the second surface is smaller than that of the first surface.

The tire bead forming structure of the tire for the anti-frictioning production operation is characterized in that the diameter of a circle defined by the upper edge of the first annular inclined plane is larger than that of a circle defined by the lower edge of the first annular inclined plane. The upper edge of the first annular inclined plane refers to the place where it joins the second surface, and the lower edge of the first annular inclined plane refers to the place where it joins the third surface through a rounded corner.

Compared with the prior art, the utility model has at least the following beneficial effects:

the utility model can realize the production operation by replacing the anti-friction cloth with the anti-friction glue, reduces the tire forming operation procedures, reduces the generation of bad tires and greatly reduces the production and manufacturing cost of the tires.

Drawings

Fig. 1 shows a molding tube mold piece of a bead molding structure used in the prior art.

Fig. 2 is a view of a prior art bead shaping structure in cooperation with a bead.

Fig. 3 is a molding tube mold piece of a bead molding structure used in the present invention.

Fig. 4 is a view of the bead shaping structures and beads used in the present invention.

FIG. 5 is a schematic view of a tire building tool configuration.

In the figure, each number represents: the rubber tire comprises a first surface 1, a first cambered surface 2, a third surface 3, a third annular inclined surface 4, a fifth surface 5, a fourth annular inclined surface 6, an included angle 7, a second surface 8, a forming cylinder mold piece 9, a fillet 10, a first annular inclined surface 11, a third cambered surface 12, a capsule supporting seat 13, a forming capsule 14, rubbing gum 15, sidewall gum 16, cord fabric 17, triangular gum 18, inner gum 19, a gap 20, a second cambered surface 21, a second annular inclined surface 22, a fifth annular inclined surface 23, a fourth surface 24, a groove bottom 25, a forming cylinder 26 and a forming cylinder membrane part 27.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

The bead shaping structure used in the present invention is shown in fig. 3 and 4. The main components of a tire bead forming structure (hereinafter referred to as a tire bead forming structure) of a tire in the production operation of the anti-frictioning are a forming cylinder template 9 and a forming capsule 14, and the forming capsule is inflated to form a groove, wherein the edge of the forming cylinder template is matched with the groove of the forming capsule to form a tire bead forming space, the forming cylinder template is provided with a left edge and a right edge, both of which are provided with annular bulges and are respectively matched with the forming capsule, and the tire is formed on the forming cylinder template; this is the same as the prior art, where the individual molding drum die pieces 27 are arc-shaped plates, all the molding drum die pieces are mounted on the molding drum 26, and the whole molding drum is circular after mounting, and the molding drum is also circular cylindrical, as shown in fig. 5, and the term "molding drum diaphragm" in the other descriptions of the present invention refers to the whole combination of all the individual molding drum diaphragm pieces.

The lower parts of the left edge and the right edge of the molding tube diaphragm are provided with annular bulges, the inner surface of the molding capsule is provided with a capsule supporting seat 13, the molding capsule is inflated during working to form a groove which is mainly used as a tire bead molding space, the molding capsule is contacted with the molding diaphragm after being inflated, the annular bulges of the molding tube diaphragm are positioned in the groove of the molding capsule to block the molding capsule from pressing the tire bead, and a larger gap is reserved in the groove of the molding capsule to be used as the tire bead molding space. In contrast, the molding tube matrix of the bead molding structure of the present invention has a first surface 1, a second surface 8, two third surfaces 3 and two first annular slopes 11, wherein the first surface 1 and the second surface 8 are opposite to each other in the vertical direction to form the outer surface and the inner surface of the molding tube matrix. The first surface 1 and the second surface 8 are both cylindrical surfaces, and are parallel surfaces, and the diameter of the second surface is smaller than that of the first surface. The diameter of the circle surrounded by the upper edge of the first annular inclined plane 11 is larger than that of the circle surrounded by the lower edge thereof. As shown in FIG. 3, the left end and the right end of the molding barrel matrix are symmetrical structures.

The third surface 3 is an annular surface perpendicular to the horizontal plane, and surrounds the edge of the first surface and the edge of the second surface to form the side surfaces of the left end and the right end of the molding barrel mold sheet. The upper edge of the third surface is smoothly connected with the edge of the first surface through the arc-shaped first arc surface 2, the lower edge of the third surface is smoothly connected with the lower edge of the first annular inclined surface 11 through the rounded corner 10, an included angle can be formed between the third surface 3 and the first annular inclined surface 11, in general, the included angle formed between the third surface 3 and the first annular inclined surface 11 can be set within a range of 45 degrees to 75 degrees, and the preferable included angle formed between the third surface 3 and the first annular inclined surface 11 is within a range of 50 degrees to 70 degrees, such as 60 degrees, 50 degrees, 55 degrees, 60 degrees, and the like. When the molding tube mold sheet and the molding capsule are matched together, the third surface 3 and the fillet 10 are preferably positioned right above the second cambered surface 21, so that the gap formed between the tire bead and the molding tube mold sheet and the molding capsule can be smaller, and if the frication preventing operation is used, the protruding part of the molding tube mold sheet can not block the molding capsule to press the frication preventing rubber and the curtain cloth when the molding capsule is pressed, residual air is easy to discharge, and air bubbles can not be generated at the tire bead part generally. The upper edge of the first annular inclined plane 11 is connected with the edge of the second surface 8, and a certain angle exists at the joint of the upper edge of the first annular inclined plane and the second surface; typically, the angle formed by the second surface 8 and the first annular inclined surface 11 may be set within the range of 135 ° to 165 °, and preferably, the angle formed by the second surface 8 and the first annular inclined surface 11 is within the range of 140 ° to 160 °, such as 145 °, 150 °, 155 °, and the like.

After inflating, the shaping capsule has the recess, the recess surface of shaping capsule is including the fourth surface 24 that can laminate with second surface 8, can with the second annular inclined plane 22 of the laminating of first annular inclined plane, to the convex second cambered surface 21 of child lip direction, the upper reason on second annular inclined plane is connected to the fourth surface, the upper reason on second cambered surface is connected to the lower edge on second annular inclined plane, the lower edge and the recess bottom 25 smooth connection of shaping capsule of second cambered surface. The bead direction means a direction in which the bead is located in the bead molding process using the bead molding structure.

The portion enclosed by the first annular inclined plane 11, the rounded corner 10 and the third surface 3 becomes a convex portion of the molding barrel matrix. The structure of the utility model improves the convex part of the back-wrap part at the tail end of the molding tube template, solves the problem that the molding capsule can not press the antifriction glue and the cord fabric due to the structure of the part, and further causes the tire lip to generate bubbles, thereby causing poor products, and the improved structure can use the antifriction glue to carry out production operation without generating bubbles.

Although the utility model has been described herein with reference to illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications may be made to the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure herein. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. A tire bead molding structure of a tire in anti-frictioning production operation comprises a molding cylinder matrix and a molding capsule, wherein a groove is formed after the molding capsule is inflated, and the edge of the molding cylinder matrix is matched with the groove of the molding capsule to form a tire bead molding space, and the molding cylinder matrix is characterized by comprising a first surface (1), a second surface (8), a third surface (3) and a first annular inclined surface (11), wherein the first surface and the second surface are opposite to each other up and down; the third surface is an annular surface vertical to the horizontal plane and surrounds the edge of the first surface and the edge of the second surface, the upper edge of the third surface is smoothly connected with the edge of the first surface through an arc-shaped first cambered surface (2), the lower edge of the third surface is smoothly connected with the lower edge of a first annular inclined surface (11) through a fillet (10), and the upper edge of the first annular inclined surface is connected with the edge of the second surface; the recess surface of shaping capsule including can with fourth surface (24) of second surface (8) laminating, can with second annular inclined plane (22) of first annular inclined plane laminating, to the convex second cambered surface of child lip direction (21), the last reason on second annular inclined plane is connected to the fourth surface, and the last reason of second cambered surface is connected to the lower edge on second annular inclined plane, the lower edge of second cambered surface and the recess bottom smooth connection of shaping capsule.

2. The structure for forming the bead of a tire for chafing dish production according to claim 1, wherein said third surface (3) and the fillet (10) are located directly above said second cambered surface (21).

3. Bead moulding structure for tyres submitted to frictionless production operations according to claim 1, characterised in that said third surface (3) forms an angle comprised between 45 ° and 75 ° with the first annular inclined surface (11).

4. Bead moulding structure for tyres submitted to frictionless production operations according to claim 3, characterised in that said third surface (3) forms an angle comprised between 50 ° and 70 ° with respect to the first annular inclined surface (11).

5. Bead moulding structure for tyres submitted to frictionless production operations according to claim 1, characterized in that said second surface (8) forms an angle comprised between 135 ° and 165 ° with the first annular inclined surface (11).

6. Bead moulding structure for tyres submitted to frictionless production operations according to claim 1, characterized in that said second surface (8) forms an angle comprised between 140 ° and 160 ° with the first annular inclined surface (11).

7. The structure for building the bead of a tire for chafing dish production according to claim 1, wherein said first surface (1) and said second surface (8) are both cylindrical surfaces, parallel surfaces, and the diameter of the second surface is smaller than that of the first surface.

8. The structure for forming the bead of a tire for frictionless production work according to claim 1, wherein the diameter of the circle surrounded by the upper edge of the first annular inclined plane (11) is larger than the diameter of the circle surrounded by the lower edge thereof.