What are the common failure modes of rubber parts?

1 Rubber aging

Rubber aging refers to the phenomenon that rubber parts are affected by various conditions in the natural and artificial environment during storage and use, and their performance and appearance deteriorate over time. Rubber products are often due to heat, oxygen and ozone in the air, sunlight, wind, rain, snow, moisture and the use of various mechanical stress or chemical solvent erosion, so that the chemical structure of rubber is damaged, become soft or hard brittle crack, rough surface, mechanical properties decline, and gradually lose the use value over time. In order to prevent or delay the aging tendency of rubber, it is necessary to pay attention to protection, try to reduce the influence of the above factors, and add antioxidant when preparing the rubber compound.

2 Rubber foaming

The bubbles on the surface of rubber products are mainly caused by the vulcanization process of rubber. Water (adding calcium oxide when mixing); Insufficiently vulcanized, unripe and bubbly looking; There are more impurities in the vulcanizing agent, and the impurities of small molecules become decomposed in advance, and the bubbles remain in the products. The exhaust design of the mold itself is not reasonable, and the gas can not be discharged in time when the rubber material is flushed. Poor dispersion; The plastic material has a long plasticizing time, and there are bubbles when the product is vulcanized.

3 Disconnect the rubber from the metal

The adhesive position between the rubber and the metal parts is disconnected, mainly due to the adhesive failure. Before rubber and metal vulcanization, it is necessary to apply adhesive on the metal surface, often due to the leakage of adhesive, adhesive failure, vulcanization process metal adhesive is too high heat causes bonding failure.