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US 5,393,341 AGranted
Method and apparatus for the production of structural foam, particularly cement foam
AssigneeRUME Maschinenbau GmbH
InventorsDieter Meier, Heinz Ruppert
Life of this patent
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Abstract
A method for the production of structural foam from air, water, foaming agent and an aggregate, particularly cement foam, for which cement slurry is blown under high pressure into a mixing chamber and mixed with a foaming agent and the mixture immediately thereafter is conveyed to an expansion nozzle, into which metered amounts of compressed air are blown.
Claims19
A method for producing structural foam from air, water, a foaming agent and an aggregate, comprising the steps of:
- injecting cement slurry under high pressure into a mixing chamber having a substantially unobstructed mixing passageway;
- injecting said foaming agent into the mixing passageway;
- mixing said injected cement slurry in said mixing passageway with a foaming agent to form a mixture;
- effecting said mixing substantially solely by said steps of injecting said cement slurry and said foaming agent into said unobstructed mixing passageway;
- immediately thereafter supplying said mixture to an expansion nozzle;
- and
- blowing measured amounts of compressed air into said expansion nozzle to foam up said mixture in the expansion nozzle into a cement foam of low foam weight.
4 more elements
A method of producing a structural foam from air, water, a foaming agent and an aggregate comprising the steps of:
- providing a block having an inlet connection for cement slurry, an inlet connection for compressed air, an inlet connection for a foaming agent and an outlet connection for cement foam;
- introducing a cement slurry into said inlet connection for cement slurry;
- injecting said introduced cement slurry into a mixing chamber in said block;
- controlling said injection of the cement slurry utilizing a cement slurry injection value disposed on said block;
- introducing a foaming agent into said inlet connection for a foaming agent;
- injecting said foaming agent into said mixing chamber;
- controlling said injection of foaming agent utilizing a foaming agent control valve disposed on said block;
- utilizing an elongated mixing chamber having an inlet end and an outlet end with a substantially unobstructed passageway between said inlet end and outlet end;
- said step of injecting said cement slurry and said step of injecting said foaming agent comprising injecting said cement slurry into said inlet end of said mixing chamber and injecting said foaming agent into said inlet end of said mixing chamber;
- effecting mixing of said cement slurry and said foaming agent in said mixing chamber as said injected cement slurry and injected foaming agent traverse said substantially unobstructed passage of said mixing chamber from said inlet end to said outlet end;
- introducing compressed air into said inlet connection for pressed air;
- injecting said compressed air into an expansion nozzle on said block;
- controlling said injection of compressed air utilizing a compressed air control valve disposed on said block;
- utilizing an elongated expansion nozzle having an inlet end and an outlet end with a substantially unobstructed nozzle passageway between said inlet end and said outlet end;
- conducting the mixed cement slurry and foaming agent immediately form said outlet end of said mixing chamber to said juxta-posed inlet of said nozzle passage of said expansion nozzle;
- said step of introducing compressed air into said nozzle passage of said expansion nozzle effecting foaming of the mixed cement slurry and foaming agent into a cement foam within said expansion nozzle;
- and
- conducting said cement foam from the outlet of the nozzle passage of said expansion nozzle directing to a processing cite.
15 more elements
Dependencies are inferred from the claim text.