Zhejiang Institute of Modern Textile Industry Research Institute recently launched the first new spinning mouth heating equipment. The equipment is an independent unit equipment independent of the spinning equipment. It is composed of two parts: induction heating system and remote control system. It can be flexibly applied to all types of melt spinning equipment without changing the structure and flow of the original equipment.

Spinning port - refers to the spinneret exit area of ​​the spin pack, where the melt turns into a trickle from its critical area and becomes a primary filament by cooling, solidifying, and stretching. As a key process control point, spinning mouth heating can not be underestimated. First, spinner heating enables the spinneret to actively generate uniform thermal energy and achieve fine control, achieving continuous and consistent plate surface temperature on the basis of the original environment, ensuring that the melt streams emitted from each hole are heated evenly, from the source The above ensures that the monofilaments are in a consistent and steady state. Secondly, without changing the conditions of the original process, the spinning port temperature is set to the same temperature as the spinning box, the freezing point can be reduced by 3 to 10 cm, and the elongation of the wound fiber is increased significantly. The nozzle in the process design is obvious. The draw ratio can be increased. After adjusting the process, it will increase the productivity by at least 2-3%. Thirdly, the spinning mouth temperature can reach a higher temperature than the spinning box body, realizing the new process design of “the relative low-temperature conveying of the melt in the pipe line, instant high-temperature spinning”. With these three major functions, many design directions related to product performance, product variety, and product types can be derived.

The patented technology pioneered by the New Material Research Institute of Zhejiang Academy of Modern Textile Industry was strongly promoted in the implementation of the national support plan and achieved fruitful results: The average strength of the novel polyester industrial yarn in the field of high-strength industrial yarns has reached Above 8.7CN/dtex, it is currently the most advanced level in China, and it also has the ability to upgrade the indicators to the international advanced level. In addition, the New Materials Research Institute's technical team has accumulated years of practical experience to complete the spinning mouth heating system technology, and can provide different product design solutions according to the type of production.