What is the relationship between the molding temperature of low-viscosity product PBT and its final surface quality?

The molding temperature of low-viscosity PBT products is of critical importance to the final product surface quality, as it directly affects the product's smoothness, uniformity and overall quality. In the plastic processing process, molding temperature is a critical parameter that can significantly affect the performance and appearance of the product. For low-viscosity PBT products, the choice of molding temperature needs to be carefully considered to ensure that the final product meets quality standards and application requirements.

Filling and flow properties are one of the key factors affecting surface quality. An appropriate molding temperature can promote good filling and flow of the PBT melt, allowing it to fully fill every minute space of the mold, thereby reducing surface bubbles and uneven melt flow. This uniform filling process is an important guarantee to ensure that the product surface is smooth and free of defects. However, if the molding temperature is too high or too low, it may cause poor melt flow, which may leave defects or bubbles on the product surface, affecting the product quality.

A suitable molding temperature helps the PBT melt to flow evenly in the mold and form a smooth surface during the cooling process. This smooth surface not only improves the appearance quality of the product, but also helps to improve the overall feel and appearance of the product. However, if the molding temperature is too high, it may cause the melt to flow too quickly, resulting in a rough surface or flow marks; while if the molding temperature is too low, it may cause the melt to flow insufficiently, resulting in an uneven surface or white spots, which will reduce the appearance quality of the product.

Molding temperature also affects the solidification rate of the PBT melt. An appropriate molding temperature can enable the product to achieve a proper solidification rate during the molding process, thereby ensuring the flatness and quality of the product surface. A too high molding temperature will lead to a too fast solidification rate, which may cause surface shrinkage and defects; while a too low molding temperature will lead to a too slow solidification rate, resulting in an unsmooth surface. Therefore, choosing the right molding temperature is a key factor to ensure good surface quality of the product.