Patent ID: 6543469
Filing Date: 2003-04-08
Classification: B29C,B29K,B32B,B60R,B63B,Y10T

Abstract:
A system for mixing and dispensing a structural foam formed from two or more component foam parts mixed together in a predetermined mass ratio, wherein at least a first one of said component parts is pre-mixed with a blowing agent and maintained under pressure, said system comprising:volumetric flow sensors to measure the rate of flow of each of the component foam parts to be mixed; a feedback loop comprising a digital computer, to determine whether the predetermined mass ratio has been achieved on an instantaneous basis, and at least one gear-type variable flow controller to reduce the flow rate of said first one of the component foam parts to be mixed, said gear-type variable flow controller adjustable by at least one of an electro-mechanical, hydraulic or electrical type braking device in response to the rate of flow data measured by said volumetric flow sensor.