Addition silicone shows many unique advantages in precision instrument casting, which makes it one of the indispensable materials in this field. The following is a detailed description of these advantages:
1. Low shrinkage and high precision
Addition silicone releases almost no low molecular weight substances during the cross-linking process, so its volume change is extremely small, and the shrinkage is usually less than 0.1%. This feature ensures that the mold can maintain extremely high dimensional stability and precision during the curing process, thereby meeting the high requirements of precision instruments for casting size.
2. High transparency and visibility
Compared with condensation silicone, addition silicone can reach a translucent or even highly transparent level. This feature allows the state of the casting material in the mold to be clearly observed during the casting process of precision instruments, such as whether there are defects such as bubbles and impurities, thereby ensuring the quality of the casting.
3. High temperature resistance and stability
Addition silicone has excellent high temperature resistance and a wide operating temperature range. It can usually be used for a long time at -65°C to 250°C and remain soft and elastic. This high temperature resistance makes addition silicone perform well when casting high-temperature molten materials, and it can resist deformation and cracking caused by thermal stress.
Fourth, environmental protection, non-toxicity and food grade certification
Addition silicone uses platinum catalyst for curing reaction, so its products are non-toxic and tasteless, meeting environmental protection requirements. Some products have also passed FDA food grade certification, indicating that they can be safely used in places where they come into contact with food. This feature makes addition silicone widely used in high-precision fields such as medical and food packaging.
Five, high tensile strength and tear resistance
Addition silicone has high tensile strength and tear resistance, and can withstand large mechanical stress without being easily damaged. This feature allows the mold to maintain good integrity during repeated use and re-molding, extending the service life of the mold and reducing production costs.
Six, easy operation and flexibility
Addition silicone has good fluidity and is easy to infuse and mold. At the same time, it can be cured at room temperature or heated, and the operation is convenient and flexible. This flexibility allows addition silicone to adapt to the needs of different processes and environments, improving production efficiency.
In summary, addition-type silicone stands out in precision instrument casting with its unique advantages such as low shrinkage, high transparency, high temperature resistance, environmental protection and non-toxicity, high tensile and tear resistance, easy operation and flexibility, and wide applicability. These advantages not only improve the manufacturing accuracy and quality of precision instruments, but also reduce production costs and promote technological innovation and development in related fields.
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