The present invention discloses a hollow EPP bead extrusion mechanism, comprising a nut and a rod body arranged at the lower part of the nut. The rod body is provided with external threads, and a smooth cavity is formed inside the nut, which is connected to the inner cavity of the rod body. The nut is a regular hexagonal prism, and there are 8 circular discharge holes arranged on the surface of the nut. The discharge holes are evenly distributed on the circumference with the center of the regular hexagon as the center; The chamfer at the connection between the rod body and the nut is 75-95 °. After passing through eight discharge holes, the molten fluid experiences swelling and then adheres together to form a hollow cylindrical filament. The hollow area communicates with the outside, providing enough hot air to support the mesopores without causing them to become flattened. The resulting hollow material has a more uniform wall thickness and a higher closure rate of the internal pores after foaming.
Kerke Extrusion Equipment
