1. The integrated structure of capsule skin and pressure ring vulcanization has a short protective shell, small swing angle, and reduces the risk of interference and abnormal noise;
2. After vulcanization molding, the shape of the capsule is close to the overall shape, reducing the inflation coefficient;
3. Unique mold structure design, reducing assembly processes and lowering assembly difficulty;
4. The combination of medium pressure ring and capsule skin vulcanization enhances the bonding strength;
5. Ensure parallelism through mold positioning and solve the difficulty of assembling the split type pressure ring.