ChangshaDie head and air ring

The air ring serves to cool the film bubble extruded from the die and blown into shape, with air as the cooling medium. At the same time, the airflow provides some support to the film bubble. The air ring can significantly increase the production capacity of the extrusion‑blowing unit.

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ChangshaProduct Center

Phone: 400-888-8888

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Product Description

The quality of the die directly affects the quality of the final product. Die design must ensure that materials can be processed at high throughput across the widest possible range of conditions, while producing an extruded film bubble with uniform thickness and temperature. The melt residence time must be sufficiently short to permit rapid material changes and to prevent degradation and crosslinking. Therefore, die design must provide adequate space for internal cooling channels to achieve optimal cooling.
Our company has partnered with Taiwan’s Hongtai to jointly develop and design functional films, particularly high‑adhesion self‑adhesive film die heads and related components. We have also developed and manufactured China’s first four‑layer co‑extruded high‑adhesion film production line, marking a significant breakthrough in the self‑adhesive film manufacturing sector. This product is now exported both domestically and internationally, earning widespread acclaim. All die heads are crafted from Japanese SFC alloy steel and undergo meticulous machining following multiple heat‑treatment cycles. The screw elements are machined on an imported four‑axis CNC machining center, ensuring exceptional dimensional accuracy and uniform material distribution across all spiral flow channels. Furthermore, each channel of the die head is carefully ground and polished, then coated with nickel and hard chrome plating to enhance wear resistance and corrosion protection.