Patent ID: 6435854
Filing Date: 2002-08-20
Classification: B01F,B29C

Abstract:
An apparatus for mixing and injection molding components for forming a thermosetting polyurethane substance, comprising:(a) a source for each component; (b) a premixing chamber, comprising a first inlet for receiving a first component, and a second inlet for receiving a second component; (c) conduits fluidly and hermetically connecting the sources of the first and second components to the premixing chamber; (d) the ratio of the cross-section area of each individual conduit to the total cross-section area of all the conduits is not less than 70% or greater than 130% of the ratio of the amount of the component it transports to the combined amount of all of the components; (e) the conduits further having an expandability such that when the pressure is increased from 9 N/cm2 to 200 N/cm2 the increase in the cross-sectional area of the conduits would be less than 20%; (f) a static mixer fluidly and hermetically connected to the premixing chamber; (g) an injector fluidly and hermetically connected to an outlet of the static mixer; (h) a valve located downstream from the static mixer and upstream from the injector to control low through the system; (i) a mold that is fluidly and hermetically connected to a nozzle of the injector; and (j) a means for controlling the temperature during the mixing and molding processes.