Rubber products may have various defects in the production process, which will not only affect the appearance of the product, but also may affect its performance and service life. Understanding these common defects and their solutions is critical to improving product quality and productivity. The following are some common defects in rubber products and the corresponding solutions:
1. Bubbles and holes
The reason:
Air is not completely discharged during mixing.
Mold exhaust bad.
There are impurities in the material.
Solution:
Improve the mixing process to ensure adequate exhaust.
Optimize mold design and increase vent holes.
Strict quality control of raw materials to remove impurities.
2. Uneven hardness
The reason:
Mixing is uneven.
Improper mold temperature control.
Insufficient or too long curing time.
Solution:
Ensure that the mixing process is adequate and the material is uniform.
Adjust mold temperature to make it uniform.
Control curing time to ensure full curing.
3. Surface defects
The reason:
Mold surface is not clean or damaged.
Improper use of release agent.
Material fluidity is poor.
Solution:
Clean and maintain molds regularly.
Choose the right release agent and use it correctly.
Choose materials with good flow or adjust the formula.
4. Size deviation
The reason:
Mold accuracy is insufficient.
Material shrinkage is inconsistent.
Improper pressure control.
Solution:
Improve mold manufacturing accuracy.
Select materials with good stability and control shrinkage rate.
Precise control of molding pressure and time.
5. Brittle fracture
The reason:
Material aging.
Overvulcanization.
Insufficient impact strength.
Solution:
Use materials with good anti-aging properties.
Control vulcanization conditions to avoid over-vulcanization.
The impact strength of the material was improved by modification.
6. Stick the mold
The reason:
Uneven or insufficient application of release agent.
The mold temperature is too high.
The material is too viscous.
Solution:
Make sure release agent is evenly applied.
Adjust mold temperature to the appropriate range.
Adjust material formulation to reduce viscosity.
7. The impression is unclear
The reason:
Mold design is not reasonable.
Material fluidity is poor.
Not enough pressure.
Solution:
Optimize mold design to ensure clear impression.
Choose materials with good fluidity.
Increase the molding pressure to ensure that the material fills the mold adequately.
8. Insufficient tensile strength
The reason:
Poor selection of materials.
The mixing process is inadequate.
Curing conditions are not suitable.
Solution:
Choose the right rubber material.
Ensure that the mixing process is adequate and the material is uniform.
Optimize curing conditions, such as temperature, time, etc.
9. Poor wear resistance
The reason:
The material hardness is insufficient.
Lack of wear resistant additives in the material formulation.
Solution:
Choose materials with higher hardness.
Wear-resistant additives, such as carbon black, are added to the formula.
10. Poor heat resistance
The reason:
The material has poor temperature resistance.
Curing is incomplete.
Solution:
Choose high temperature resistant rubber material.
Optimize the curing process to ensure that the material is fully cured.
conclusion
There are many kinds of defects in rubber products, but by understanding the causes of defects and taking appropriate measures to solve them, the quality and consistency of products can be significantly improved. This not only requires an in-depth understanding of material properties, but also requires strict control and management of every step of the production process. Continuous technological innovation and quality improvement are the key to promoting the development of the rubber products industry.