Motorcycle tire manufacturing process

Tires are ground rolling circular elastic rubber products assembled on various vehicles or machinery. Usually installed on the metal rim, it can support the body, cushion the external impact, achieve contact with the road surface and ensure the driving performance of the vehicle. Tires are often used under complex and harsh conditions, and they bear a variety of deformation, load, force and high and low temperature effects when driving, so they must have high bearing performance, traction performance and buffer performance. At the same time, it also requires high wear resistance and flexural resistance, as well as low rolling resistance and heat generation. Half of the world’s rubber consumption is used in tire production, which shows the ability of tires to consume rubber. The following is a demonstration of the whole process of tire production:

Process 1: mixing process

The mixing process is the process of mixing raw materials such as carbon black, natural/synthetic rubber, oil, additives, and accelerators together and processing them in the mixing machine to produce “rubber”. All raw materials must be tested before entering the mixer and can only be used after being released. The weight of each pot is about 250 kg. The rubber used in each rubber part of the tire is of specific properties. The composition of the compound depends on the requirements of the performance of the tire. At the same time, the change in the composition of the rubber also depends on the needs of the supporting manufacturers and the market, which mainly comes from the requirements of traction, driving performance, road conditions and the tire itself. All rubber materials are tested before entering the next process – the preparation of rubber parts, and are released before entering the next process.

Step 2: Preparation of rubber parts

The rubber parts preparation process consists of 6 main sections. In this process, all semi-finished rubber parts that make up the tire will be prepared, some of which are preliminarily assembled. The six sections are:

Section 1: Extrusion

The compound is fed into the extruder head to extrude different semi-finished rubber parts: tread, side/mouth and triangular strip.

Section 2: Calendering

The raw material cord is passed through the calender and a thin layer of glue is hung on both sides of the cord, and the final product is called “cord fabric”. Raw material cord is mainly nylon and polyester two kinds.

Section 3: Bead forming

The bead is made of many pieces of steel wire which are wound after hanging glue. The rubber material used for the bead has special properties, and when vulcanized, the rubber material and the steel wire can be tightly bonded together.

Section 4: Cord cutting

In this process, the curtain fabric is cut to the appropriate width and the joint is fastened. The width and Angle of the curtain change mainly depends on the specifications of the tire and the requirements of the tire structure design.

Section 5: Stick triangle tape

In this process, the extruder-extruded triangular strips are hand-fitted to the bead. The triangular rubber strip plays an important role in the operating performance of the tire.

Section 6: Belt forming

This process is to produce the belt layer. In the spindle room, a number of steel wires come out through the threading plate, and then pass through the mouth plate at the same time with the rubber material to hang the glue on both sides of the steel wire. The tape layer is cut to a specified Angle and width after hanging the glue. The width and Angle depend on the tire specifications and the requirements of the structural design.

All rubber parts will be transported to the “tire forming” process and ready for tire forming.

Step 3: Tire forming process

The tire forming process is to assemble all the semi-finished products on the forming machine into a fetus, where the fetus is not vulcanized. The fetus is examined and transported to the vulcanization process.

Step 4: vulcanization process

The raw tire is loaded to the vulcanization machine, and after the appropriate time and suitable conditions in the mold, it is vulcanized into the finished tire. The vulcanized tire has the appearance of the finished tire – the pattern/font and the tread pattern. Now, the tires will be sent to the final inspection area.

Step 5: Final inspection process

In this area, the tire first goes through a visual appearance inspection, and then a uniformity test, which is done by a “uniformity test machine”. The uniformity test machine mainly measures radial force, lateral force, cone force and fluctuation. After the uniformity test is done, the dynamic balance test is done on the “dynamic balance experiment machine”. Finally, the tires are X-rayed and transported to the finished product warehouse for shipment.

Step 6: Tire test

In the process of designing new tire specifications, extensive tire testing is necessary to ensure that the tire performance meets the requirements of the government and the assembly factory.

After the tires are officially put into production, we continue to monitor the quality of the tires by doing the same tests that we do when releasing new tires. The machine used to test tires is the “mileage test”, and the experiments usually performed are high-speed experiments and endurance experiments.

Ground rolling circular elastomeric rubber products mounted on various vehicles or machinery.

Usually installed on the metal rim, it can support the body, cushion the external impact, achieve contact with the road surface and ensure the driving performance of the vehicle. Tires are often used under complex and harsh conditions, and they bear a variety of deformation, load, force and high and low temperature effects when driving, so they must have high bearing performance, traction performance and buffer performance. At the same time, it also requires high wear resistance and flexural resistance, as well as low rolling resistance and heat generation. Half of the world’s rubber is used in tire production.

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