CN209987403U

CN209987403U - Preforming structure before inner tube vulcanization

Info

Publication number: CN209987403U
Application number: CN201920620269.8U
Authority: CN
Inventors: 蒋延伟; 何长军
Original assignee: Weihai Runtong Rubber Co Ltd
Current assignee: Weihai Runtong Rubber Co Ltd
Priority date: 2019-05-01
Filing date: 2019-05-01
Publication date: 2020-01-24
Anticipated expiration: 2029-05-01

Abstract

The utility model discloses a preforming structure before inner tube of a tyre vulcanizes for solve attenuation, breach, the string scheduling problem at mouth dish edge. The adopted scheme is that tire tube patterns are arranged on the periphery of a nozzle disc, the thickness of a tire tube is increased, and adhesive glue is coated. The quality problem of the edge of the inner tube valve is solved through the key technology, the qualification rate of inner tube products is improved, and the problem of disc edge cracks of the valve in the use process of the inner tube is solved.

Description

Preforming structure before inner tube vulcanization

Technical Field

The utility model relates to an inner tube of a tyre makes the field, concretely relates to inner tube of a tyre vulcanizes preceding preforming structure, especially relates to the structure of inflating valve department.

Background

In the production of the inner tube, the combination degree of the nozzle disc and the tube directly influences the quality of the inner tube, the problems of pleating, cracking, local thinness, low tensile strength and the like of the edge of the nozzle disc easily cause air leakage and damage of the inner tube, and the quality and the service life of the inner tube are greatly influenced.

The main reasons for the above problems are: 1) when the inner tube is subjected to expansion molding before vulcanization, the inner tube is caused by different expansion and stretching of the tire tube and the nozzle disc, the nozzle disc is made of the mature rubber, the tire tube is made of the raw rubber, the stress concentration is generated by the expansion and stretching of the mature rubber and the raw rubber, and the edge of the nozzle disc is locally thinned due to local stretching; 2) the mature rubber of the nozzle disc and the crude rubber of the tire tube are not completely bonded, and the vulcanized tire tube is easy to crack; 3) the conventional thickness of the tube is thin, the tensile strength is low, and the tube is easy to pleat or thin under stretching.

SUMMERY OF THE UTILITY MODEL

To above-mentioned a series of problems, the utility model provides a solve wherein at least one problem, provide a pre-forming structure before the inner tube of a tyre vulcanizes, through the institutional advancement to the rim of a plate of mouth to the quality of the inner tube of a tyre when improving inflation shaping.

The utility model discloses a first technical scheme who adopts as follows: the pre-forming structure before the vulcanization of the inner tube comprises a tube and an air valve, wherein the air valve comprises a valve disc, the valve disc is bonded with the tube, and patterns are arranged on the tube at the periphery of the valve disc.

Further, the patterns are arranged in an area which is expanded by 15-25 mm from the edge of the nozzle disc radially outwards.

Furthermore, the pattern is a grid pattern, or scattering stripes which are scattered outwards by taking the center of the nozzle disc as the center, or stripes which are scattered outwards in a spiral shape from the edge of the nozzle disc, or the pattern is an irregular pattern.

The utility model discloses the second technical scheme who adopts as follows: the pre-forming structure before the inner tube vulcanization comprises a tire tube and an air valve, wherein the air valve comprises a valve disc, the valve disc is bonded with the tire tube, and the thickness of the tire tube at the periphery of the valve disc is thicker than the normal thickness of the tire tube.

Furthermore, the thickness of the area of the tyre cylinder is increased by 0.18-0.22 mm compared with the normal thickness of the tyre cylinder.

The utility model discloses the third technical scheme who adopts as follows: the pre-forming structure before the inner tube vulcanization comprises a tire tube and an air valve, wherein the air valve comprises a valve disc, the valve disc is bonded with the tire tube, patterns are arranged on the tire tube at the periphery of the valve disc, and the thickness of the tire tube at the periphery of the valve disc is thicker than the normal thickness of the tire tube.

Further, the patterns are arranged in an area which is expanded from the edge of the nozzle disc to the outside by 15-25 mm, and the area of the thickness increased by the tyre cylinder can cover the area of the patterns.

Furthermore, the thickness of the tire tube at the periphery of the nozzle disc is increased by 0.18-0.22 mm compared with the normal thickness of the tire tube.

Furthermore, the edge part of the nozzle plate is coated with adhesive glue.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

1. the inner tube with the improved patterns has uniform molding expansion of the disc edge of the nozzle, and solves the problems of nonuniform molding expansion of the disc edge of the nozzle and thin disc edge of the nozzle.

2. The thickness of the coiled edge of the mouth is increased, the strength is increased, and the problem that the coiled edge of the mouth is easy to pleat is solved.

3. The edge of the nozzle disc is coated with the mucilage, so that the bonding strength of the nozzle disc and the tire tube is increased, and the quality problem that the edge of the nozzle disc of the vulcanized tire is easy to crack is solved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.

FIG. 1 is a first schematic representation of a pattern on the periphery of a nozzle disc of an inner tire;

FIG. 2 is a second schematic representation of the pattern of the inner tire bead disk periphery;

FIG. 3 is a third illustration of the pattern around the inner tire bead disk;

FIG. 4 is a schematic view of the uneven cross-section of the pattern;

fig. 5 is a schematic view of the thickness thickening of the periphery of the inner tire nozzle disc.

Detailed Description

The invention is described in detail below with reference to the drawings and examples, wherein the drawings are used to explain the invention together with the examples. However, it should be understood by those skilled in the art that the following examples are not intended to limit the technical solutions of the present invention, and all equivalent changes or modifications made in the spirit of the technical solutions of the present invention should be considered as falling within the protection scope of the present invention.

The utility model discloses mainly from following several aspects before the inner tube of a tyre vulcanizes to valve department make structural improvement:

the first improvement of the utility model is that the periphery of the valve disc of the inner tube valve is provided with decorative patterns, as shown in figures 1-3. When the tire tube is molded and expanded before vulcanization, because the tire tube 1 is made of raw rubber and the nozzle disc 2 is made of boiled rubber, the stress concentration of a junction point is generated at the bonding point of the nozzle disc and the tire tube due to different expansion and stretching, and the local thinning of the edge of the nozzle disc occurs in local stretching. Therefore, the utility model discloses the method of taking is at the increase decorative pattern A of mouth dish peripheral position to the expansion ratio when reducing child section of thick bamboo shaping makes the local inflation of child section of thick bamboo shaping obstructed, and the bulging force will be arranged evenly like this, thereby improves the problem of mouth dish edge attenuation.

Further, the patterns A are arranged in an area which radially extends from the edge of the nozzle disc to the outside by about 15-25 mm.

Still further, the pattern a may be a grid pattern, or scattering stripes that diffuse outward from the center of the disk, or stripes that spirally spread outward from the edge of the disk, as shown in fig. 1, 2, and 3, or other irregular shapes, which aim to make the surface uneven.

Although the tire tube is uneven at the portion of the pattern a, the entire thickness of the portion is uniform as shown in fig. 4.

The second improvement of the utility model is that the edge of the nozzle disc 2 is coated with the mucilage to improve the bonding strength of the nozzle disc 2 and the tire tube 1. The inner tube produced by the traditional method has the problems that raw rubber of a nozzle disc and mature rubber of a tube are not completely bonded, cracks are easy to occur in the vulcanized inner tube, and the problem that the edge stress of the nozzle disc concentrates on the split of the inner tube is easy to occur in the running process of a vehicle. Therefore, the utility model discloses apply paint the bonding mucilage of certain concentration with a brush at mouth dish edge, vulcanize the inner tube of a tyre after drying, mouth dish limit portion just like this with child section of thick bamboo bonding firm, the crackle-free solves the easy breach problem of mouth dish limit portion. Butyl rubber can be used as the adhesive cement.

The third improvement of the utility model is that the thickness of the tyre tube around the nozzle disc is increased by about 0.2mm compared with the normal thickness. The traditional thickness structure of a tire tube is changed, the local thickness of the tire tube at the periphery of the nozzle disc is increased by 0.18-0.22 mm, the problem that the edge of the nozzle disc is easy to pleat in the production process after the thickness is increased is solved, the tensile strength of the part can be improved, the qualification rate is improved, and the service life of the inner tube is prolonged.

Furthermore, the area D of increased thickness of the tyre cylinder 1 is at least the area covering the pattern a, and may coincide with (just cover) the area of the pattern a or may be larger than (over-cover, as shown in fig. 5) the area of the pattern a.

Through the improvement, the technical indexes of the inner tube are compared with those before the improvement as shown in the following table:

obviously, the utility model discloses improve the nozzle dish of the back inner tube of a tyre and obviously improve with the adhesive strength of a child section of thick bamboo, easily shaping in the production is even with shaping inflation, has solved quality problems such as the interior nozzle dish edge of production pleates, thin, the breach, has reduced manufacturing cost, has increased economic benefits. The inner tube is a technical breakthrough in the inner tube industry, not only prolongs the service life of the inner tube and reduces the bad loss of products, but also relieves the worry and difficulty for outer tire manufacturers. After vulcanization, the pattern of the part disappears, and the tire tube recovers the original thickness and the flat state.

Claims

1. The utility model provides a pre-forming structure before inner tube vulcanizes, includes a child section of thick bamboo and inflating valve, the inflating valve includes the mouth dish, the mouth dish with a child section of thick bamboo bonding, its characterized in that: patterns are arranged on the tire cylinder at the periphery of the nozzle disc.

2. The pre-tire-cure preform construction of claim 1, wherein: the decorative pattern is arranged in an area which is radially and outwards expanded by 15-25 mm from the edge of the nozzle disc.

3. Pre-vulcanising pre-form construction for inner tubes according to claim 1 or 2, characterized in that: the patterns are grid patterns, or scattered stripes which are scattered outwards by taking the center of the filter disc as the center, or stripes which are scattered outwards in a spiral shape from the edge of the filter disc.

4. The utility model provides a pre-forming structure before inner tube vulcanizes, includes a child section of thick bamboo and inflating valve, the inflating valve includes the mouth dish, the mouth dish with a child section of thick bamboo bonding, its characterized in that: the tire tube at the periphery of the nozzle disc is provided with patterns, and the thickness of the tire tube at the periphery of the nozzle disc is thicker than the normal thickness of the tire tube.

5. The pre-tire-cure preform construction of claim 4, wherein: the decorative pattern is arranged in an area which is radially and outwards expanded by 15-25 mm from the edge of the nozzle disc, and the area of the thickness of the tire cylinder can cover the decorative pattern.

6. The pre-tire-cure preform construction of claim 4 or 5, wherein: the thickness of the tire tube at the periphery of the nozzle disc is increased by 0.18-0.22 mm compared with the normal thickness of the tire tube.

7. The pre-tire-cure preform construction of claim 4, wherein: and the edge part of the nozzle disc is coated with adhesive glue.