Process and device for filling cavities, particularly mold cavities, with a reactive, flowable mixture
AssigneeMaschinenfabrik Hennecke GmbH
InventorsUlrich Osinski, Rene Kummer
Life of this patent
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Abstract
The instant invention broadly relates to a process and apparatus for filling a cavity with a reactive mixture. More particularly, the invention relates to a process for filling cavities, particularly mold cavities, with a reactive, flowable mixture which preferably forms foam, wherein at least two reaction components are brought into a mixing zone, where they are mixed and then brought into the cavity, the improvement wherein at the beginning of the filling process, during a limited time interval, the reaction mixture is fed into the cavity under low flow velocity until the mixture has reached a certain level in the cavity, and subsequently the remaining mixture to be injected, is fed in under increased flow velocity.
Claims15
In a process for filling a mold with a reactive, flowable mixture which preferably forms foam, wherein at least two reaction components are brought into a mixing means, where said components are mixed and subsequently brought into a cavity of a mold, the improvement wherein, at the beginning of the filling process, a first portion of the reaction mixture is fed into the cavity of said mold under low flow velocity until the mixture has reached a preselected level in the cavity of said mold, less than full, and subsequently the remaining portion of the mixture to be injected is fed in under increased flow velocity.
In an apparatus for introducing reactive components into a cavity comprising an interconnecting mold and mixing means, the exit opening of said mixing means corresponding to the feed opening of said mold and component feed lines leading to said mixing means, the improvement wherein said mixing means is connected to a storage means, whose walls at least partially consist of an elastic membrane, behind which an elastic membrane cavity is arranged, said membrane being connected with a pressure source and a venting nozzle.
In an apparatus for introducing reactive components into a cavity comprising an interconnecting mold and a mixing means, the exit opening of said mixing means corresponding to the feed opening of said mold, and component feed lines leading to said mixing means, the improvement wherein said mixing means is immediately connected with a storage means whose volume can be changed opposite its exit direction by a movable piston, wherein the maximum volume of the storage chamber is a multiple of the minimum volume.
Dependencies are inferred from the claim text.