Reason Analysis:

1. Inconsistent dosage of colorants or pigments compared to the standard:

   • Deviation in the amount of colorants or pigments added to the rubber seal.
   • Ensure the dosage of colorants aligns with the specified standards.
   • Regularly monitor and adjust the colorant dosage during production.

2. Uneven mixing or blending of rubber compounds, or mixing different batches together:

   • Inadequate mixing of rubber compounds leading to uneven dispersion of colorants.
   • Thoroughly mix the rubber compounds to achieve uniform color distribution.
   • Avoid combining rubber compounds from different batches to prevent variations in color.

3. Water residue or moisture causing watermarks and similar color variations:

   • Presence of water in the rubber compounds resulting in watermarks or color discrepancies.
   • Prevent rubber compounds from coming into contact with water during storage and production.
   • Dry the rubber compounds immediately after water exposure to avoid color variations.

4. Excessive mold temperature or prolonged vulcanization time:

   • High mold temperature or extended vulcanization time can cause color variations.
   • Maintain the mold temperature within the recommended range.
   • Optimize the vulcanization time to prevent overexposure and color discrepancies.

Corresponding Improvement Measures:

1. Ensure consistent dosage of colorants according to the standard:

   • Verify the recommended dosage of colorants or pigments for the rubber seal.
   • Strictly adhere to the specified dosage during production.
   • Regularly check and calibrate the equipment used for colorant measurement to maintain accuracy.

2. Thoroughly and uniformly mix rubber compounds, or produce separate batches:

   • Ensure thorough mixing of rubber compounds to achieve a uniform dispersion of colorants.
   • Use appropriate mixing equipment and techniques to ensure consistent results.
   • Avoid mixing rubber compounds from different batches to prevent color discrepancies.

3. Avoid soaking rubber compounds in water, and promptly dry them after water exposure:

   • Prevent rubber compounds from coming into contact with water during storage or production.
   • If water exposure occurs, promptly dry the rubber seal using suitable methods such as air drying or heat treatment.
   • Implement proper storage and handling practices to minimize moisture absorption.

4. Precisely control mold temperature and vulcanization time:

   • Regularly monitor and adjust the mold temperature to ensure it remains within the recommended range.
   • Avoid excessively high mold temperatures, as they can cause discoloration.
   • Optimize the vulcanization time to prevent overexposure, which can lead to color variations.
   • Conduct regular maintenance and calibration of vulcanization equipment to ensure accurate temperature and time control