Method and apparatus for the production of a bead of organic material intended to serve as a seal and insert in a multiple glazing

摘要

In order to form a bead of organic material having a butyl rubber base and a viscosity greater than 35000 poises, the material in a drum is heated and pumped by a reciprocating pump and delivered to an output nozzle via a conduit. A lock chamber in the conduit is delimited by valves. A variable volume chamber connected to the lock chamber or upstream of the lock chamber is able to selectively take in or discharge organic material for maintaining a constant pressure at the nozzle.