A method for controlling the stiffness of cord fabric

Abstract

The invention relates to a method for controlling the stiffness of cord fabric. The softening treatment adopts a knife-type softening device, which is more than one set of kneading knives, and each set of kneading knives includes a first blade and a second blade, and a first blade and a second blade They are respectively used to apply bending stress in the opposite direction to the cord fabric; in each group of kneading knives, the thickness of the knife edge of the first blade and the second knives are the same, and the angles of the kneading knives are the same. The included angle of the horizontal plane; the control method is to set the kneading tension, the number of kneading knives, the angle of kneading knives and the thickness of the knives according to the specifications of the cord fabric, so as to change the bending degree and bending stress of the cord under the action of the knives to achieve the desired The required stiffness, since the stiffness is closely related to curling, warping, and flatness, can also achieve the required curling, warping, and flatness.

Description

technical field [0001] The invention belongs to the technical field of cord fabrics and relates to a method for controlling the stiffness of cord fabrics. Background technique [0002] With the rapid development of the transportation industry, higher and higher requirements are put forward for tire safety, wear resistance and other performance. Among them, an important indicator that affects tire usability is the stiffness of the tire cord. If the tire cord If the stiffness is large or small, when the stiffness is adjusted, the surface of the cord fabric will be warped and the surface will be curled. The degree of automation of downstream tire manufacturers is getting higher and higher. The above situation affects the downstream automatic splicing, affects tire molding, affects production efficiency, and even causes problems such as poor adhesion to rubber, which seriously affects the quality of tires, thereby reducing the quality of tires. Fatigue resistance, shortened ser...

AI Technical Summary

Problems solved by technology

The degree of automation of downstream tire manufacturers is getting higher and higher. The above situation affects the downstream automatic splicing, affects tire molding, affects production efficiency, and even causes problems such as poor adhesion to rubber, which seriously affects the quality of tires, thereby reducing the quality of tires. Fatigue resistance, shortened service life

[0003] In order to solve the above problems, existing technologies such as "Li Ruihong, Li Tao. Analysis on the Hardness of Cord Fabrics for Tires. China Rubber, 2004, 20(17), 23-24.", "Lu Xiaodong, Jiang Sheliu, Ding Shuqing. Abroad The development status of the tire cord dipping machine. China Rubber, 2009, 25(5), 15-16.", "Patent ZL201620555277.5" and so on adopt changing the temperature of the stretching zone, the tension of the dipping zone, the degree of vacuum, Restoring the temperature in the zone, increasing the softening device, changing the tool of the softening device, adjusting the parameters of the softening device, etc. These methods mainly reduce the cord fabric by adjusting the diameter of the knife edge, the change of temperature, the change of tension, and the amount of glue applied. Stiffness, to improve the displacement of the weft yarn, the operation is more complicated

[0004] Therefore, it is of great practical significance to study a simple method to solve the problem of large or small stiffness of the cord fabric and realize the softness and smoothness of the fabric surface.

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