Apparatus for plasticizing material such as rubber, synthetic plastics and like plasticizable compositions
AssigneeHermann Berstorff Maschinenbau GmbH
InventorHeinz Brinkman
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Abstract
An apparatus for plasticizing material such as rubber, synthetics plastics and like plasticizable compositions comprising feeding material between two spaced apart surfaces, preferably rollers, at least one of which is rotatingly propelled, the surfaces being so shaped and relatively disposed that the material is repeatedly subjected to varying pressure, varying down to zero at times, and thus more intensive, less intensive and virtually no shearing work. Where the surfaces are on rollers the rollers are preferably formed with helical grooves, the rollers being rotated in the same or opposite directions.
Claims10
Apparatus for plasticising rubber and plastics materials, comprising a pair of members defining two spaced apart surfaces, means for rotating at least one of said members, each of said surfaces being formed to present helically extending grooves defined by helically extending intermediate webs, with the webs of each of said surfaces being axially offset relative to each other and being of a width relative to the width of the grooves on the opposite surface so that each web projects on both sides of an opposed groove, said surfaces co-operating with one another such that the material is subjected to constantly changing gap combinations defined respectively by a narrow gap between web surfaces, a medium gap between a web surface and the bottom of an opposed groove, and a wide gap between opposed grooves, thereby achieving thorough kneading and mixing of the material.
Dependencies are inferred from the claim text.