Raw material preparation
Rubber: Natural growth rubber or synthetic rubber is usually used for tire processing. Depending on the performance requirements of the tire, various additives such as carbon black, sulfur, propellants, anti-aging agents, etc. are added to determine the physical properties of the rubber, such as strength, performance, and aging resistance, based on the actual effect
Curtain fabric: It is generally made of fiber materials such as polyester and nylon. As the skeleton material of the tire, it can withstand various stresses during the use of the tire, improve the strength and stability of the tire.
Steel wire: used to manufacture steel wire rings and belt layers, enhance the strength and rigidity of tires, improve the load-bearing capacity and puncture resistance of tiresMixing
Rubber and various additives are added to a mixer according to determined ratios in multiple regions for mixing. Through high temperature, high pressure, and mechanical shear, the rubber and additives are fully mixed evenly, forming a rubber compound with good processing and physical properties.
. During the mixing process, it is necessary to strictly control parameters such as temperature, time, and feeding sequence to confirm the stable quality of the mixed rubberRolling and Extrusion
Rolling: The mixed rubber is pressed into a film with a determined thickness and width through a rolling machine, and the skeleton materials such as curtain or steel wire are bonded together with the film to make various components of the tire, such as tread rubber, sidewall rubber, curtain layer, etc. During the rolling process, it is important to control parameters such as rolling speed, temperature, and pressure to ensure uniform thickness and smooth surface of the film, as well as strong adhesion between the skeleton material and the film
Extrusion: The mixed rubber is extruded into various shapes of semi-finished products through an extruder, such as bead wire, rubber hose, etc. During the extrusion process, it is necessary to select the appropriate extruder head and process parameters based on the shape and size requirements of the product, and confirm the dimensional accuracy and surface quality of the extruded material
Molding
The various tire components produced by rolling and extrusion are combined and molded on a molding machine according to a determined process sequence to form the prototype of the tire.
. During the molding process, attention should be paid to the positioning and fitting accuracy of each component to protect the overall structural symmetry and dimensional accuracy of the tire. At the same time, it is necessary to inflate and adjust the formed tires to meet the specified shape and size requirements