Foam plastics manufacturing method and machine
AssigneeCannon Viking Limited
InventorAnthony Charles Murray Griffiths
Life of this patent
Estimating the term…
Abstract
Production of foamed materials in a horizontal machine, and said machine itself, reactants being fed to a conveyor at one end of the machine and foam produced being removed at the other end, wherein the foam is generated in an expansion chamber defined at its inlet by a closed reactant feed zone, at its outlet by a body of foam already expanded or partly expanded, and laterally and vertically by travelling webs, the webs giving a diverging cross section to the chamber.
Claims24
A method of producing foamed slabstock in a horizontal machine comprising reactants being fed through a reactant feed zone to a conveyor at one end of the machine and foam produced being removed at the other end, wherein in order to support and constrain the rise profile of a body of expanding foam while in the fluid state:
- the reactant feed zone is closed, with no exposure of reactants to the atmosphere,
- the foam is generated in an expansion chamber closed at its inlet by the reactant feed zone, at its outlet by a body of foam already expanded or partly-expanded, at top sides and bottom by traveling webs, the traveling webs sealed to the inlet,
- the chamber has a cross-section area that progressively increases in the direction of production,
- the base of the expansion chamber is not inclined forwards or is so inclined by no more than 10 degrees to the horizontal.
An apparatus for the production of foamed materials, wherein in use reactants are fed through a reactant feed zone to a conveyor at one end of the machine and foam produced is removed at the other end, and in order to support and constrain the rise profile of a body of expanding foam while in the fluid state comprising:
- a reactant feed zone that is closed, with no exposure of reactants to the atmosphere,
- an expansion chamber closed at its inlet by the reactant feed zone, at its outlet by a body of foam already expanded or partly-expanded, at top sides and bottom by traveling webs, the traveling webs sealed to the inlet,
- wherein the chamber has a cross-section area that progressively increases in the direction of production, and
- the base of the expansion chamber is not inclined forwards or is so inclined by no more than 10 degrees, to the horizontal.
Dependencies are inferred from the claim text.