Plastic parts processing swirl how to do?

Plastic products play an important role in life, its processing quality directly affects the performance and service life of the product. During the processing of plastic parts, various problems may be encountered, among which "swirl" is a common surface quality problem. It usually appears as a rotating or swirling pattern, which not only affects the aesthetics of the product, but also may affect its function. How to deal with this situation?

The appearance of swirling patterns in the processing of plastic parts is usually due to the uneven flow of plastic when filling the mold. This uneven flow may be caused by a variety of factors, including irrational mold design, improperly set injection parameters, wrong choice of material or insufficient drying. In response to these possible causes, measures can be taken to solve or mitigate the problem of swirling.

First, at the mold design stage, it should be ensured that the runner system is well designed so that the molten plastic can fill every corner of the mold evenly. In addition, adding or optimizing the cooling system is also necessary to help the plastic cool quickly and uniformly in the mold cavity to avoid internal stresses due to large temperature differences, which can lead to swirls.

The setting of injection parameters is also critical. This includes injection speed, pressure, time, as well as holding time and holding pressure. Adjust these parameters to ensure that the plastic parts processing plastic in the filling process of fluidity, while avoiding too fast injection speed leads to fluid front end disorder, the formation of swirl.

The choice of material is equally important. Different plastic materials have different flow properties, and it's critical to choose a material that's right for a particular product. Also, ensuring that the material is sufficiently dry is an important step in preventing swirls. Wet plastics can generate vapors during the heating process, which can lead to unstable plastic flow and thus the formation of swirls.

In addition to the above measures, swirls can also be improved or eliminated by means of post-processing. For example, the surface quality of a plastic part that already has swirl marks can be improved by grinding, polishing or spraying.

When plastic parts are machined, in some cases if the swirl is very severe, the entire manufacturing process may need to be reconsidered. This may involve changing materials, redesigning molds or even changing the machining process. While this can increase costs, these changes are necessary to ensure product quality and performance.

Prevention is always better than cure. It is critical to have a rigorous quality control system in place during the processing of plastic parts. Through rigorous inspection of raw materials, processing and final products, possible problems can be detected and solved in time to avoid swirls.