Holding pressure time in injection molding production, several key factors need to be considered

In the injection molding process, holding pressure time is a crucial parameter that directly affects the quality and production efficiency of the final product. This critical stage not only influences the plastic's molding effect but is also closely related to the product's density, dimensional accuracy, and surface quality. Properly setting the holding pressure time can effectively ensure that the molten plastic is fully solidified in the mold, minimizing defects caused by shrinkage or deformation. Specifically, holding pressure time refers to the period during which pressure is continuously applied to the mold after injection and filling are completed. During this time, the molten plastic is subjected to continuous and uniform pressure around the mold, which helps to fill the tiny voids inside the mold and further improve the density and integrity of the finished product.

It is important to note that a longer holding pressure time is not always better. An excessively long holding pressure time can lead to over-solidification of the plastic, making product demolding difficult and even causing damage to the mold. Therefore, when setting the holding pressure time, it is essential to fully consider the material properties, mold design, and production process requirements, and to make reasonable trade-offs and adjustments. Additionally, if the holding pressure time is too short, it can result in uncured plastic inside the product, which not only affects the overall performance of the product but may also cause stability issues during subsequent use, reducing product reliability and durability.

In summary, the proper setting of holding pressure time is crucial for injection molding. It not only relates to the quality and performance of the product but also directly affects production efficiency and cost control. Therefore, mastering and optimizing the setting of holding pressure time has become a key factor that restricts the sustainable progress and development of the injection molding industry.