Production of spiral heads

Blow heads – Spiral

This head divides the polymer melt flow into the suitable number of spiral grooves whose depth decreases in the direction of the flow. The perfect distribution of melt output is ensured by the spiral mandrel. Spiral heads also have low pressure loss. They are suitable for a large range of materials and wide range of process conditions. The absence of sewer lines is a big advantage as well. The size of the system for multi-layer blow molding can be a small disadvantage (every layer needs its own spiral mandrel) as it makes the total dimensions bigger. In case of the lack of space, you can use flat spiral heads where the same principle for melt flow is applied but it is only embeddable. The system of independent boards for each layer of the material has the same diametre and they differ only by the shape of distribution channels and spirals for individual layers.