阅读说明：本技术 一种用于解决轮胎子口内裂的方法 (Method for solving inner crack of tire bead ) 是由 刘正明 付金鹏 姚雪梅 于 2020-12-31 设计创作，主要内容包括：本发明适用于轮胎技术领域,提供了一种用于解决轮胎子口内裂的方法,包括以下步骤：选取具有子口内裂病象的胎胚作为实验对象；检测实验对象上出现胎胚问题的位置范围；所述胎胚问题至少包括子口内裂病象和胎胚子口内侧落差大于指定值；在未出现胎胚问题的胎胚的内衬上贴附胶片,胶片的贴附位置根据实验对象上出现胎胚问题的位置范围确定。与现有技术相比,本发明有效避免了未出现胎胚问题的胎胚会在同一部位出现胎胚问题的现象,所贴附的胶片能够有效保护轮胎的子口端点,降低小规格子口内侧反包端点处落差,使其过渡平缓,增加了小规格的安全系数,使得轮胎的质量得到提升,减少维修品和废次品的数量,节约了成本和人力。(The invention is suitable for the technical field of tires and provides a method for solving the problem of inner crack of a tire bead, which comprises the following steps: selecting a fetal embryo with a subcontact internal fissure symptom as an experimental object; detecting the position range of the embryo problem on the experimental object; the embryo problems at least comprise the symptoms of the internal cracking of the seam allowance and the fall of the inner side of the seam allowance of the embryo larger than a specified value; and adhering a rubber sheet to the inner liner of the green tire without the green tire problem, wherein the adhering position of the rubber sheet is determined according to the position range of the green tire problem on the experimental object. Compared with the prior art, the invention effectively avoids the phenomenon that the green tires without green tire problems can have green tire problems at the same position, the attached rubber sheet can effectively protect the seam allowance end point of the tire, the fall of the reverse wrapping end point at the inner side of the small-specification seam allowance is reduced, the transition is smooth, the safety factor of the small specification is increased, the quality of the tire is improved, the number of maintenance products and waste and defective products is reduced, and the cost and the labor are saved.)

1. A method for solving the problem of internal cracking of a tire bead, comprising the steps of:

selecting a fetal embryo with a subcontact internal fissure symptom as an experimental object;

detecting the position range of the embryo problem on the experimental object; the embryo problems at least comprise the symptoms of the internal cracking of the seam allowance and the fall of the inner side of the seam allowance of the embryo larger than a specified value;

and adhering a rubber sheet to the inner liner of the green tire without the green tire problem, wherein the adhering position of the rubber sheet is determined according to the position range of the green tire problem on the experimental object.

2. The method for solving the problem of the tire bead internal cracking as claimed in claim 1, wherein the step of selecting the embryo with the symptoms of the bead internal cracking as the experimental object specifically comprises:

and (3) performing statistical analysis on the embryo with the symptoms of the internal fissure in the seam allowance produced in a period of time through an NC system, and selecting the embryo with the symptoms of the internal fissure in the seam allowance exceeding a specified degree as an experimental object.

3. The method for solving the problem of the tire bead internal cracking as claimed in claim 2, wherein the step of selecting the embryo with the occurrence of the bead internal cracking symptoms exceeding a specified degree as the experimental object is specifically as follows:

selecting the embryo with the most symptom of the internal fissure of the seam as an experimental object.

4. The method as claimed in claim 1, wherein the size and the attaching position of the film are continuously adjusted when the film is attached to the inner liner of the green tire without the problem of the green tire, so as to determine the size and the attaching position of the film during the final attaching.

5. The method for solving the problem of the inner crack of the tire bead as claimed in claim 4, wherein the specification of the film at the time of final application is as follows:

the thickness is 0.9 to 1.1mm and the width is 29 to 31 mm.

6. The method for solving the problem of the inner crack of the tire bead as claimed in claim 5, wherein the specification of the film at the time of final application is as follows:

the thickness is 1.0mm and the width is 30 mm.

7. The method for solving the problem of the inner crack of the tire bead as claimed in claim 4, wherein the adhesive sheet is attached to the two sides of the tire blank 19-21 mm away from the edges of the inner liner of the tire blank at the final attachment.

8. The method of claim 7, wherein the adhesive sheet is applied to both sides of the green tire at a distance of 20mm from the edges of the inner liner of the green tire.

Technical Field

The invention belongs to the technical field of tires, and particularly relates to a method for solving the problem of tire bead internal cracking.

Background

The bead, also called as tire bead, is a part of the tire mounted on the rim, which is composed of a steel wire ring and a bead wrapping cloth, and the like, and can bear the stretching force generated by the internal pressure, and overcome the transverse force applied to the tire in the cornering driving process, so that the outer tire is not separated from the rim, therefore, the tire has high strength and is not easy to deform.

The small-size seam allowance cloth and the tire side are narrow, the distance between the inner end point of the seam allowance cloth and the inner end point of the seam abrasion-resistant glue is very close, and a high fall is formed at the reverse wrapping end point on the inner side of the seam allowance, so that the transition from the end point on the inner side of the seam allowance to the midpoint of the tire side is unnatural. The safety coefficient of the small-size tire is greatly reduced, when the tire sidewall deviates upwards, the inner end point of the sub-opening wrapping cloth and the inner end point of the sub-opening wear-resistant glue are overlapped to form a step, air can be stored in the step when the tire blank is vulcanized, the air cannot be extruded by the bladder, and finally the internal cracking symptom of the sub-opening appears; or if the vulcanized capsule separant is sprayed more during vulcanization and is not completely absorbed by the capsule, the capsule separant is concentrated at the step and cannot be extruded by the capsule, and the symptom of internal fracture of the mouth of the patient appears.

In order to avoid the occurrence of the internal crack symptoms of the bead and improve the quality of the tire, a rubber sheet is usually attached to an inner liner of the tire, and the end point of the bead of the tire is effectively protected by the rubber sheet, so that the tire is not easy to crack in use, and the generation of the internal crack symptoms of the bead of the tire is reduced.

The applicant of the present invention finds that, in implementing the above technical solution, the above technical solution has at least the following disadvantages:

when the film is attached, the film is often only attached to the tire, and the phenomenon that the tire cracks in the seam is more easily avoided without considering the specific positions of the film attached to the tire, so that some attached films cannot play a role in protecting the seam end point of the tire.

Disclosure of Invention

An object of an embodiment of the present invention is to provide a method for solving the problem of the inner crack of the tire bead, which aims to solve the problems mentioned in the background art.

The embodiment of the invention is realized by a method for solving the problem of the inner crack of the tire bead, which comprises the following steps:

selecting a fetal embryo with a subcontact internal fissure symptom as an experimental object;

detecting the position range of the embryo problem on the experimental object; the embryo problems at least comprise the symptoms of the internal cracking of the seam allowance and the fall of the inner side of the seam allowance of the embryo larger than a specified value;

and adhering a rubber sheet to the inner liner of the green tire without the green tire problem, wherein the adhering position of the rubber sheet is determined according to the position range of the green tire problem on the experimental object.

Preferably, the step of selecting a fetal embryo with a symptom of the internal fissure in the muzzle as an experimental object specifically comprises:

and (3) performing statistical analysis on the embryo with the symptoms of the internal fissure in the seam allowance produced in a period of time through an NC system, and selecting the embryo with the symptoms of the internal fissure in the seam allowance exceeding a specified degree as an experimental object.

Preferably, the step of selecting a fetal embryo with a subcontact internal fissure symptom exceeding a specified degree as an experimental object specifically comprises the following steps:

selecting the embryo with the most symptom of the internal fissure of the seam as an experimental object.

Preferably, when the film is attached to the inner liner of the green tire without the green tire problem, the specification and the attachment position of the film are continuously adjusted, and the specification and the attachment position of the film at the time of final attachment are determined.

Preferably, the specification of the film at the time of final attachment is as follows:

the thickness is 0.9 to 1.1mm and the width is 29 to 31 mm.

Preferably, the specification of the film at the time of final attachment is as follows:

the thickness is 1.0mm and the width is 30 mm.

Preferably, the attaching position of the rubber sheet during final attaching is 19-21 mm away from the side part of the inner liner of the tire blank on two sides of the tire blank.

Preferably, the attaching position of the rubber sheet during final attaching is 20mm away from the edge part of the inner liner of the tire blank on two sides of the tire blank.

The embodiment of the invention provides a method for solving the problem of the inner crack of a tire bead, which comprises the following steps: selecting a fetal embryo with a subcontact internal fissure symptom as an experimental object; detecting the position range of the embryo problem on the experimental object; the embryo problems at least comprise the symptoms of the internal cracking of the seam allowance and the fall of the inner side of the seam allowance of the embryo larger than a specified value; and adhering a rubber sheet to the inner liner of the green tire without the green tire problem, wherein the adhering position of the rubber sheet is determined according to the position range of the green tire problem on the experimental object.

Compared with the prior art, the invention effectively avoids the phenomenon that the embryo problem does not occur to the embryo which does not occur to the embryo at the same position by detecting the position range of the embryo problem occurring to the experimental object and attaching the rubber sheet to the inner liner of the embryo which does not occur to the embryo problem, the attached rubber sheet can effectively protect the seam allowance end point of the tire, reduce the fall at the reverse wrapping end point at the inner side of the small-specification seam allowance, make the transition smooth, increase the safety factor of the small-specification, improve the quality of the tire, reduce the number of maintenance products and waste and defective products, and save the cost and manpower.

Drawings

Fig. 1 is a flowchart illustrating steps of a method for solving the problem of the inner crack of the tire bead according to an embodiment of the present invention.

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 invention and are not intended to limit the invention.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

Example 1

As shown in fig. 1, a method for solving the problem of the inner crack of the tire bead is provided for one embodiment of the invention, and the method comprises the following steps:

s101, selecting a fetal embryo with a subcontact internal fissure symptom as an experimental object;

s102, detecting the position range of the embryo problem on the experimental object; the embryo problems at least comprise the symptoms of the internal cracking of the seam allowance and the fall of the inner side of the seam allowance of the embryo larger than a specified value;

and S103, attaching a rubber sheet to the inner liner of the green tire without the green tire problem, wherein the attaching position of the rubber sheet is determined according to the position range of the green tire problem on the experimental object.

In actual production, tires of the same batch often have the phenomenon of cracking in the tire bead at the same position. Therefore, when the position range of the green tire problem on the experimental object is known, other tires in the batch can be determined to have the green tire problem at the same position. Therefore, the positions of the rubber sheets to be attached to the inner liner of the tire blank without the tire blank problem are determined according to the position range of the tire blank problem on the experimental object, and the rubber sheets are attached to the determined attachment positions, so that the tire blank problems of other tires in the batch can be avoided, the quality of the tire is improved, the seam allowance end points of the tire are effectively protected, the tire is not prone to cracking in use, and the generation of the tire seam allowance internal cracking symptoms is reduced.

Compared with the prior art, the method and the device have the advantages that the position range of the blank problem on the experimental object is detected, the rubber sheet is attached to the inner liner of the blank without the blank problem, the attachment position of the rubber sheet is determined according to the position range of the blank problem on the experimental object, the phenomenon that the blank problem occurs on the same part of the blank without the blank problem is effectively avoided, the attached rubber sheet can effectively protect the seam allowance end point of the tire, the fall of the reverse wrapping end point on the inner side of the small-specification seam allowance is reduced, the transition is smooth, the safety coefficient of small specifications is increased, the quality of the tire is improved, the number of maintenance products and waste and defective products is reduced, and the cost and the labor are saved.

Example 2

A method for addressing tire bead cracking is provided for one embodiment of the present invention, the method comprising the steps of:

s201, performing statistical analysis on the embryo with the symptom of the internal fissure in the seam allowance produced in a period of time through an NC system, and selecting the embryo with the symptom of the internal fissure in the seam allowance exceeding a specified degree as an experimental object;

s202, detecting the position range of the embryo problem on the experimental object; the embryo problems at least comprise the symptoms of the internal cracking of the seam allowance and the fall of the inner side of the seam allowance of the embryo larger than a specified value;

s203, adhering a rubber sheet to the inner liner of the green tire without the green tire problem, wherein the adhering position of the rubber sheet is determined according to the position range of the green tire problem on the experimental object.

In the present example, the basic procedure was the same as in example 1. Except that the experimental subjects were selected by the NC system in this example.

In this embodiment, the embryo with the most number of symptoms of the inner cracks in the seam is selected as the experimental object, and it is further determined that the embryo without the embryo problem may have the embryo problem at the same position. The rubber sheet is attached to the inner liner of the tire blank without the tire blank problem through the determined position range with the tire blank problem, so that the tire blank without the tire blank problem is prevented from generating the tire blank problem in the future, the quality of the tire is improved, the tire is not easy to crack in use, and the generation of the tire seam internal crack symptoms is reduced.

Example 3

A method for addressing tire bead cracking is provided for one embodiment of the present invention, the method comprising the steps of:

s301, performing statistical analysis on the embryo with the symptom of the internal fissure in the seam generated in a period of time through an NC system, and selecting the embryo with the symptom of the internal fissure in the seam exceeding a specified degree as an experimental object;

s302, detecting the position range of the embryo problem on the experimental object; the embryo problems at least comprise the symptoms of the internal cracking of the seam allowance and the fall of the inner side of the seam allowance of the embryo larger than a specified value;

s303, attaching a rubber sheet to the inner liner of the green tire without the green tire problem, wherein the attaching position of the rubber sheet is determined according to the position range of the green tire problem on the experimental object; continuously adjusting the specification and the attaching position of the rubber sheet when the rubber sheet is attached to the edge of the inner liner of the green tire, and further determining the specification and the attaching position of the rubber sheet during final attaching; the specification of the film at the final attachment is as follows: the thickness is 0.9-1.1 mm, and the width is 29-31 mm; and the attaching position of the rubber sheet during final attaching is 19-21 mm away from the side part of the inner liner of the green tire on the two sides of the green tire.

In the embodiment of the present invention, in the extrusion process of embodiment 2, the specification and the attaching position of the film are continuously adjusted, and a trial and error is continuously performed, so as to find the most suitable specification and the attaching position of the film, that is, the specification and the attaching position of the film in the final attaching process. The inventor finds that the film has the thickness of 0.9-1.1 mm and the width of 29-31 mm in continuous adjustment, when the attaching positions of the film are 19-21 mm away from the edge of the inner liner of the blank on two sides of the blank, the film has the best protection effect on the seam allowance end point of the tire, the transition of the fall of the reverse wrapping end point on the inner side of the small-specification seam allowance is the most gentle, the quality of the tire can be improved to the greatest extent, the number of maintenance products and waste and defective products is reduced, and the cost and the labor are saved.

Example 4

A method for addressing tire bead cracking is provided for one embodiment of the present invention, the method comprising the steps of:

s401, performing statistical analysis on the embryo with the symptom of the internal fissure in the seam generated in a period of time through an NC system, and selecting the embryo with the symptom of the internal fissure in the seam exceeding a specified degree as an experimental object;

s402, detecting the position range of the embryo problem on the experimental object; the embryo problems at least comprise the symptoms of the internal cracking of the seam allowance and the fall of the inner side of the seam allowance of the embryo larger than a specified value;

s403, attaching a rubber sheet to the inner liner of the green tire without the green tire problem, wherein the attaching position of the rubber sheet is determined according to the position range of the green tire problem on the experimental object; continuously adjusting the specification and the attaching position of the rubber sheet when the rubber sheet is attached to the edge of the inner liner of the green tire, and further determining the specification and the attaching position of the rubber sheet during final attaching; the specification of the film at the final attachment is as follows: the thickness is 1.0mm, and the width is 30 mm; the attaching position of the rubber sheet during final attaching is 20mm away from the edge of the inner liner of the green tire on two sides of the green tire.

The embodiment of the invention is to further determine the optimal specification and the optimal attachment position of the film on the basis of the embodiment 3. The results determined were as follows: the thickness of the film is 1.0mm, the width is 30mm, and the attaching position of the film is 20mm away from the edge of the inner liner of the blank on two sides of the blank.

Taking a tire produced in one month as an example, the number of repair and defective products due to the occurrence of a green tire problem per month before the method of this embodiment is used is about 20, and after the method of this embodiment is used, it is basically reduced to 2, even 0. Therefore, the method can effectively protect the end point of the tire bead, reduce the fall of the turning-up end point at the inner side of the small-specification bead, ensure the smooth transition, increase the safety coefficient of the small specification, improve the quality of the tire, reduce the number of maintenance products and defective products, and save the cost and the labor.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.