Process 1: internal mixing process

Internal mixer technology is a process of mixing carbon black, natural/synthetic rubber, oil, additives, accelerators and other raw materials, and processing and producing "mixed rubber" in the internal mixer. All raw materials must be inspected before entering the mixer, and can only be used after being released. The weight of each can of material in the blender is about 250 kg. The rubber used for each rubber part in a tire has specific characteristics. The composition of rubber compound depends on the requirements of tire performance. At the same time, the change of rubber composition also depends on the needs of supporting manufacturers and markets, mainly from the requirements of traction, driving performance, road conditions and tires themselves. All rubber compounds must be tested before entering the next process-rubber parts preparation process, and can only enter the next process after being released.

Step 2: Prepare rubber parts.

The preparation process of rubber parts includes six main parts. In this process, all semi-finished rubber parts that make up the tire will be prepared, some of which are initially assembled. These six parts are as follows:

Part I: Extrusion

The rubber mixture is fed into an extruder head to extrude different semi-finished rubber parts: tread, sidewall/bead and triangular rubber strip.

Part 2: calendering

The raw material cord passes through the calender, and a thin layer of rubber compound is hung on both sides of the cord. The final product is called "curtain". The raw material cords are mainly nylon and polyester.

Part 3: bead molding

Beads are made of many steel wires bonded and wound. This kind of compound for tire bead has special properties. After vulcanization, rubber compounds and steel wires can be closely attached together.

Section 4: Curtain Cutting

In this process, the curtain cloth will be cut to a suitable width and spliced. The change of cord width and angle mainly depends on the specifications of tire and the requirements of tire structure design.

Section 5: Sticking triangular adhesive tape.

In this process, the triangular rubber strip extruded by the extruder will be manually attached to the bead. Triangular rubber strip plays an important role in tire handling performance.

Section 6: Belt Modeling

This process is the production of belts. In the spindle room, many steel wires come out of the threading plate and then pass through the template with glue at the same time, so that the steel wires are glued on both sides. After gluing, the tape layer is cut to a specified angle and width. The width and angle depend on the requirements of tire size and structural design.

All rubber parts will be transported to the "tire manufacturing" process for tire manufacturing.

Step 3: tire forming process

The tire molding process is to assemble all semi-finished products into green tires on a molding machine, where green tires are not vulcanized. After the raw tire is inspected, it is transported to the vulcanization process.

Step 4: vulcanization step

The raw tire is loaded on a vulcanizing machine, and it is vulcanized into a finished tire after appropriate time and conditions in the mold. Vulcanized tires have the appearance of finished tire patterns and tread patterns. Now, the tires will be sent to the final inspection area.

Process 5: Final Inspection Process

In this area, the tire should be visually inspected first, and then the uniformity inspection should be completed by the "uniformity testing machine". Uniformity tester mainly measures radial force, lateral force, cone force and fluctuation. After the uniformity test, the dynamic balance test should be carried out, and the dynamic balance test should be completed on the "dynamic balance test machine". Finally, the tires will be X-rayed and then transported to the finished product warehouse for delivery.

Step 6: Tire test

In the process of designing new tire size, a large number of tire tests are needed to ensure that the tire performance meets the requirements of the government and supporting factories.

After the tires are officially put into production, we will continue to do tire testing and monitor the quality of tires. These tests are the same as those conducted when new tires are released. The machine used to test tires is "mileage experiment", and the experiments usually done are high-speed experiment and durability experiment.