What are the criteria for judging the appearance defects of silicone rubber products?

First, the concept of appearance defects

Silicone rubber products, as an important elastic material, are widely used in many fields. However, in the production process, due to various reasons, silicone rubber products may appear a variety of appearance defects. These defects not only affect the aesthetics of the product, but can also negatively affect the performance of the product. Therefore, it is very important to establish a set of perfect appearance defect judgment criteria for the quality control of silicone rubber products.

2. Judging criteria

1. Size and shape

(1) The size and shape of the product should meet the design requirements, and there should be no obvious distortion, deformation or asymmetry.

(2) The proportion between the parts should be coordinated, there should be no obvious too large or too small phenomenon.

2. Surface quality

(1) The surface of the product should be smooth and flat, and there should be no obvious bumps, depressions, roughness or cracks.

(2) The surface of the product should be clean, no impurities, dirt, bubbles and other defects.

3. Color and luster

(1) The color of the product should meet the design requirements, there should be no obvious color difference or uneven color phenomenon.

(2) The color of the product should be bright and bright, and there should be no obvious dull, yellow or aging phenomenon.

4. Structural quality

(1) The structure of the product should be reasonable and stable, without delamination, fault or bubble phenomenon.

(2) The structure of the product should be consistent with the design drawings, without obvious errors or asymmetries.

5. Physical properties

(1) The hardness, elasticity, wear resistance and other physical properties of the product should meet the design requirements.

(2) After the specified aging test, the physical properties of the product should remain stable.

Three, common problems and treatment methods

1. Size and shape problems: If the product appears obvious distortion, deformation or asymmetry, it may be due to unreasonable mold design or improper control of process parameters in the production process. Should re-check the mold design drawings and production process parameters, adjust the production process, to ensure that the size and shape of the product meet the requirements.

2. Surface quality problems: If the surface of the product has obvious bumps, depressions, roughness or cracks, it may be because the surface quality of the mold is not high or the temperature control in the production process is improper. The mold surface quality should be improved or the temperature and other process parameters should be adjusted to ensure that the surface of the product is smooth and flat. At the same time, for the unqualified products that have been produced, grinding, polishing and other treatments can be carried out to improve the surface quality.

3. Color and color problems: If the product has obvious color difference or uneven color phenomenon, it may be due to the unstable quality of raw materials or improper temperature control during the production process. Raw materials with uniform color should be replaced or process parameters such as temperature should be adjusted to ensure that the color and color of the product meet the requirements. At the same time, for the unqualified products that have been produced, they can be painted and dyed to change their color and luster.

4. Structural quality problems: if the product appears delamination, fault or bubble phenomenon, it may be due to uneven mixing of raw materials or improper pressure control during the production process. Should re-check the raw material mixing process or adjust the pressure and other process parameters to ensure that the structure of the product is stable and dense. At the same time, for the unqualified products that have been produced, they can be repaired and reinforced to enhance their structural stability.

5. Physical properties: If the hardness, elasticity, wear resistance and other physical properties of the product do not meet the design requirements, it may be due to the unstable quality of raw materials or improper control of process parameters in the production process. Raw materials with stable physical properties should be replaced or process conditions such as adjusting process parameters should be adjusted to ensure that the physical properties of products meet the requirements. At the same time, for the unqualified products that have been produced, they can be reworked and remanufactured to improve their physical performance indicators.

Iv. Conclusion

This paper introduces in detail the criteria for judging the appearance defects of silicone rubber products and the treatment of common problems. In the actual production process, it is very important to identify and deal with different types and degrees of appearance defects in time. The quality and performance of silicone rubber products can be effectively improved and the market competitiveness of products can be enhanced by strictly observing the appearance defect judgment standards and taking corresponding treatment measures. With the continuous emergence of new materials and new processes and the continuous improvement of consumer requirements for product quality, the future research on the appearance defect judgment standards of silicone rubber products will be more in-depth and perfect to meet the needs of industry development.