Process and apparatus for extruding stabilizers
AssigneeEnviroStrand, Inc.
InventorsMaarten Molenaar, Hermann A. Schreuder
Life of this patent
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Abstract
A process and apparatus for producing a dust-free blend of additives for use in plastic manufacture wherein the materials are extruded through apertures in a thin die plate supported by a strong die plate support, the apertures in the die plate being larger at their inlet ends than at their outlet ends, and apertures in the die plate support being larger than the die plate apertures, and the product being strand-like pellets of the additive materials.
Claims20
A process for the production of a granular blend of additives for use in manufacturing plastics by mixing such additives and subsequently processing them into granules, which includes the steps of providing a quantity of additive material, providing a thin perforated die plate having tapered die openings which are larger in diameter at their inlet ends than at their outlet ends, providing at the outlet side of said die plate a perforated die support plate having openings of a larger diameter than the die openings, causing the additive material to be introduced into and extruded through the openings in the die plate and discharging the extruded material as strand-like granules through said support plate openings.
Apparatus for the production of strand-like extruded granules containing one or more additives for use in the manufacture of plastics, comprising:
- a housing having an inlet for material to be granulized and an outlet for the granulized material;
- a perforated die supported within the housing and having die openings therethrough, and a perforated die support plate engaging and supporting the die at the outlet side thereof and having support plate openings therethrough which are of larger diameter than said die openings;
- and
- roller means spaced from and adjacent to the perforated die, said roller means and die being mounted for movement relative to one another to press the material against the die to extrude it through the die openings thereof and discharge the resulting extruded granules through said die support plate openings.
Dependencies are inferred from the claim text.