Common quality defects and their causes in tire manufacturing process (3)

Quality defects and causes of outer tire vulcanization

1. The sidewall cracks and double skin often appear near the waterproof line below the sidewall or at the tread joint, which is caused by poor fluidity of the rubber material; Oil stains or excessive application of isolation agents on the surface of semi-finished tire sidewalls; The model temperature is too high or the embryo stays in the model for too long before vulcanization; Improper design of the exhaust line of the model results in residual gases and other factors inside the model.

2. Lack of glue often occurs on the sidewall and patterned rubber blocks, which is caused by improper design of the exhaust holes or lines in the model, resulting in clogged exhaust holes; Insufficient internal pressure of the water tire; Poor flow of adhesive material; Caused by factors such as moisture or unclean touch.

3. Bubble delamination usually occurs at the shoulder and crown of the fetus. The reason for its occurrence is due to the short parking time after the embryo is formed; Under sulfur due to insufficient internal pressure of vulcanization or temperature drop of Superheated water; The shape of the semi-finished tire tread is unreasonable or the amount of rubber is insufficient; The fabric layer contains too much moisture or there is residual air in the components; Excessive brushing of gasoline between layers during molding; The adhesive material is caused by factors such as moisture and oil stains.