Static mixer

摘要

A method for the manufacture of a static mixer in an injection molding process includes the steps: injecting a polymer melt containing a foaming agent into a passage at an injection point at an injection pressure of less than 500 bar; filling the passage with the polymer melt containing a foaming agent; at least partial foaming of the melt containing a foaming agent in the passage, with the ratio of flow path length to height amounting to at least 10. The installation body is made up at least partly of foamed plastic and has a ratio of longitudinal dimension to diameter larger than 1 and a ratio of longitudinal dimension to wall thickness of at least 10.

主权项

1. A static mixer comprising
a tubular housing having a longitudinal axis and defining a flow passage for a fluid; and at least two installation bodies disposed in said tubular housing and connected together in coaxial relation to each other disposed in said for mixing the fluid passing through said flow passage of said housing, each said installation body being rotated relative to the other of said two installation bodies and being comprised of at least partially foamed plastic having a longitudinal dimension, a width and a wall thickness wherein the ratio of said longitudinal dimension to said width is at least 1; and wherein the ratio of said longitudinal dimension to said wall thickness is at least 10.