CN112829517A - Flap for truck tire and preparation method thereof - Google Patents

Abstract

The invention discloses a rim strip for a heavy-duty tire and a preparation method thereof, the rim strip for the heavy-duty tire comprises a rim strip body and a reinforced rubber layer, the rim strip body is provided with an opening, the reinforced rubber layer is arranged in the opening, the side wall of the reinforced rubber layer is connected with the inner wall of the opening in a vulcanization mode, the reinforced rubber layer is provided with an insertion hole penetrating through the body, at least one layer of cord thread is laid in the reinforced rubber layer, and the insertion hole is not intersected with the cord thread.

Description

Flap for truck tire and preparation method thereof

Technical Field

The invention relates to the technical field of truck tire assembly, in particular to a flap for a truck tire and a preparation method thereof.

Background

The rim strip is used for isolating the inner tube from the rim on the inner side of the tire with the inner load, so that the inner tube is protected from being burnt or rubbed and damaged by the rim under the conditions of high temperature and high pressure in the running process, the air retention performance of the inner tube is guaranteed to the maximum extent, and the safe running of the tire is guaranteed. The part is chewed to the PAD area that uses now and is used copper facing (zinc) iron sheet to carry out the reinforcement to PAD part, as shown in figure 7, but iron sheet material easily produces the interference with the interior tire valve copper pole when the equipment operation, leads to the power between the metal to dredge doubly to cause the tire valve cushion position atress of interior tire to tear the damage, lead to the interior tire to lack the air decompression, influence driving safety.

Disclosure of Invention

The invention aims to provide a rim strip for a heavy-duty tire and a preparation method thereof, which reduce the probability of stress damage of an air nozzle of an inner tire, improve the use safety and save the cost.

In order to achieve the purpose, the invention adopts the technical scheme that: a rim strip for a truck tire comprises a rim strip body and a reinforcing rubber layer, wherein an opening is formed in the rim strip body, the reinforcing rubber layer is arranged in the opening, the side wall of the reinforcing rubber layer is connected with the inner wall of the opening in a vulcanization mode, a jack penetrating through the rim strip body is formed in the reinforcing rubber layer, at least one layer of cord thread is laid in the reinforcing rubber layer, and the jack is not intersected with the cord thread.

As a further optimization, the cord laying direction is perpendicular to the jack axis direction.

As a further optimization, the cord is a warp and weft cord which is formed by interweaving warps and wefts.

As a further optimization, the cords intersect with nodes.

As a further optimization, the cord has one to three layers.

As a further optimization, the cord is aramid cord.

As a further optimization, the inner wall of the opening is at least partially wavy, and the side wall of the reinforced rubber layer has a shape matched with the inner wall of the opening.

As a further optimization, a connecting gasket is formed on the lower portion of the inner wall of the opening, and the reinforcing rubber layer is connected to the connecting gasket in a vulcanization mode.

As a further optimization, the opening is square, circular or irregular.

The invention also provides a preparation method of the flap for the heavy-duty tire, which comprises the following steps,

s1) processing the cushion belt body and the reinforced rubber layer, and arranging an opening on the cushion belt body;

s2) cutting the reinforced rubber layer according to the opening size to form a jack, uniformly coating glue on the opening part, and pasting the reinforced rubber layer after drying;

s3) putting the rubber cushion into a vulcanization mould to be vulcanized, so that the reinforced rubber layer and the cushion belt body are integrated into a whole, and the cushion belt for the truck tire is manufactured.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention reduces the probability of the stress damage of the air nozzle of the inner tube, improves the use safety and saves the cost;

2. the rim strip is favorable for assembling with an inner tube, a heavy-duty tire with an inner portion and a rim, the air nozzle checking procedure in the assembling process is saved, and the assembling efficiency and the assembling quality can be improved.

Drawings

FIG. 1 is a block diagram of the present invention.

Fig. 2 is a structural view of the body of the rim strip of the present invention.

FIG. 3 is a schematic structural view of the reinforced rubber layer of the present invention.

FIG. 4 is a structural view of a cord according to the present invention.

Fig. 5 is a structural view of a body of a rim strip according to another embodiment of the present invention.

FIG. 6 is a schematic diagram of a body of a rim strip according to yet another embodiment of the present invention.

Fig. 7 is a structural view of a conventional iron piece mounted on a rim strip.

In the drawings, 1. a flap body; 11. an opening; 111. the wave shape is realized; 112. connecting a gasket; 2. a reinforcing rubber layer; 20. a jack; 21. wrapping rubber; 22. a cord thread; 220. a node; 221. warp threads; 222. a weft; 101. iron sheets.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 6, the rim strip for the heavy duty tire comprises a rim strip body 1 and a reinforced rubber layer 2, wherein the rim strip body 1 is provided with an opening 11, the reinforced rubber layer 2 is arranged in the opening 11, the side wall of the reinforced rubber layer is connected with the inner wall of the opening 11 in a vulcanization mode, the reinforced rubber layer 2 is provided with an insertion hole 20 penetrating through the body, at least one layer of cord thread 22 is laid in the reinforced rubber layer, and the insertion hole 20 is not intersected with the cord thread 22.

The reinforced rubber layer is formed by forming a layer of wrapping rubber 21 on the outer side of the cord, the wrapped rubber 21 and the cord are integrated, the strength of the reinforced rubber layer can be improved, the reinforced rubber layer has certain flexibility, the PAD PAD part is reinforced by utilizing the reinforced rubber layer to replace a conventional hard iron sheet 101, the stress on an inner tire air nozzle part can be relieved, and therefore the inner tire is better protected and the service life of the inner tire is prolonged.

The method specifically comprises the following steps: after the inner tube, the rim strip, the inner load-carrying tire and the rim are assembled, the tire pressure is about 14Map, other parts of the tire are all closed whole, only the open slot part of the rim air nozzle is hollowed out, so the open slot part of the rim air nozzle is the maximum stress point, the PAD part of the rim strip is exposed at the open slot part of the rim air nozzle, and the reinforced rubber layer in the invention can fully enhance the strength of the PAD part of the rim strip due to the characteristics and can slow down the stress of the inner air nozzle part through the flexibility of the material of the reinforced rubber layer, thereby more effectively protecting the inner tube and ensuring the safe operation of the vehicle.

The direction of the cord 22 is perpendicular to the axial direction of the socket 20.

The cord 22 is a warp/weft cord formed by interlacing warp 221 and weft 222, and improves the shape retention and strength of the cord itself.

The intersecting part of the cord 22 is provided with a node 220, and the shape-keeping property of the cord can be enhanced through the interweaving and the knotting of the warp and the weft, so that the use strength of the reinforced rubber layer is improved.

The cord 22 has one to three layers; the cord 22 may be aramid cord.

In another embodiment of the invention, the inner wall of the opening 11 is at least partially in a wave shape 111, the side wall of the reinforced rubber layer 2 has a shape matched with the inner wall of the opening 11, and the contact area between the reinforced rubber layer and the inner wall of the opening can be increased by arranging the inner wall part or the whole part of the opening in the wave shape, so that the reinforced rubber layer has better bonding effect after vulcanization.

In another embodiment of the present invention, a connection pad 112 is formed on the lower portion of the inner wall of the opening 11, and the reinforced rubber layer 2 is vulcanized and connected to the connection pad 112, and similarly, when the inner wall of the reinforced rubber layer is vulcanized and connected to the sidewall of the opening, the connection pad and the reinforced rubber layer integrally formed under the inner wall of the opening are further vulcanized and connected, so that the contact area between the two can be increased, and the adhesion degree between the two can be improved.

The opening 11 is square, circular, shaped or otherwise.

A preparation method of a flap for a heavy-duty tire comprises the following steps,

s1) processing the cushion belt body and the reinforced rubber layer, and arranging an opening on the cushion belt body;

s2) cutting the reinforced rubber layer according to the opening size to form a jack, uniformly coating glue on the opening part, and pasting the reinforced rubber layer after drying;

s3) putting the mixture into a vulcanization mold for vulcanization, wherein the vulcanization time is as follows: 5' ± 30 ", temperature: 170 ℃. + -. 10 ℃ and air pressure: 0.7 plus or minus 0.1Mpa, so that the reinforced rubber layer and the cushion belt body are integrated into a whole, and the cushion belt for the truck tire is prepared.

According to the invention, the reinforced rubber layer replaces a conventional iron sheet, and the stress of the internal air nozzle part is slowed down, so that the inner tube is more effectively protected, and the safe operation of a vehicle is ensured.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (10)

1. The utility model provides a rim strip for heavy-duty tire, its characterized in that includes rim strip body (1) and reinforcing rubber layer (2), be equipped with opening (11) on rim strip body (1), reinforcing rubber layer (2) set up in opening (11), and its lateral wall is connected with opening (11) inner wall vulcanization, is equipped with jack (20) that runs through its body on this reinforcing rubber layer (2), and its inside laid at least one deck cord thread (22), jack (20) are not crossing with cord thread (22).

2. The flap for heavy duty tires according to claim 1, characterized in that, the direction of laying the cord thread (22) is perpendicular to the axial direction of the insertion hole (20).

3. The flap for heavy duty tires according to claim 2, characterized in that the cord (22) is a warp and weft cord, which is formed by interlacing warp (221) and weft (222).

4. The flap for heavy duty tires according to claim 3, characterized in that, the cord (22) has a knot (220) at the intersection.

5. The flap for heavy duty tires according to claim 1, characterized in that the cord (22) is one to three layers.

6. The flap for heavy duty tires according to claim 1, characterized in that the cord (22) is an aramid cord.

7. The flap for heavy duty tires according to claim 1, characterized in that the inner wall of the opening (11) is at least partially undulated (111), and the sidewall of the reinforcing rubber layer (2) has a shape matching the inner wall of the opening (11).

8. The flap for heavy duty tires according to claim 7, characterized in that the lower part of the inner wall of the opening (11) is formed with a connecting pad (112), and the reinforcing rubber layer (2) is vulcanized and connected to the connecting pad (112).

9. The rim strip for heavy duty tires according to claim 1, characterized in that, the opening (11) is square, circular or irregularly shaped.

10. The method for producing a rim strip for heavy-duty tires according to any one of claims 1 to 9, characterized by comprising the steps of,

s1) processing the cushion belt body and the reinforced rubber layer, and arranging an opening on the cushion belt body;

s2) cutting the reinforced rubber layer according to the opening size to form a jack, uniformly coating glue on the opening part, and pasting the reinforced rubber layer after drying;

s3) putting the rubber cushion into a vulcanization mould to be vulcanized, so that the reinforced rubber layer and the cushion belt body are integrated into a whole, and the cushion belt for the truck tire is manufactured.

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