Hopper Feed Pultrusion Die

Hopper feed pultrusion die features a top-mounted resin impregnation chamber and fiber distribution chute, shown as a row of stainless steel feed boxes with conical hoppers. This design integrates resin wetting and fiber pre-forming directly at the die entrance, reducing material waste and improving profile consistency.

How It Works

Glass rovings and continuous mat are fed through the conical hopper, where they are immersed in resin from a closed resin bath. The saturated fiber bundle then passes through a pre-former that shapes it to the approximate cross-section before entering the heated die. The hopper design controls resin content and prevents resin drips and volatile emissions around the work area.

Key Components

• Stainless steel conical hoppers for fiber and resin feed.

• Resin distribution channels for uniform wet-out.

• Pre-former plates that guide the fiber bundle into the die cavity.

• Heated die blocks with profiled cavities.

• Bolted frame for rigid alignment and easy disassembly.

Advantages

The hopper feed system provides consistent resin-to-glass ratio, reduces styrene emissions, and minimizes resin waste. It is especially useful for pultrusion of profiles with complex cross-sections where manual fiber placement would be inconsistent. The enclosed design also improves workplace safety and housekeeping.

Applications

Hopper feed dies are used for high-volume production of standard FRP profiles: angles, bars, tubes, and custom sections. They are commonly found in pultrusion shops producing structural shapes for construction, electrical, and corrosion-resistant applications.

Conclusion

The hopper feed pultrusion die is an integrated, efficient system for resin impregnation and profile forming. It improves working conditions and product consistency while reducing material waste.