Method and assembly for extruding a rubber compound
AssigneeThe Goodyear Tire & Rubber Company
InventorsJean Luc Dheur, Erich Nicolaus Lemaire, Michel Meunier
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Abstract
The invention relates to the extrusion of tire components with a large change of gauge across their cross-sectional area. It is provided a method and an assembly for extruding such a tire component with an extruder feeding a flow channel with a downstream die opening, whereby a deflector is provided in the flow channel upstream the die opening such that a flow of rubber is slowed down in front of broad portions of the cross-sectional area of the downstream die, avoiding distortion or bending of the extruded tire component.
Claims2
A method for extruding a rubber compound, the method comprising the steps of:
- providing an extruder, a die with a die opening the cross-section of which comprises a first area with a dimension which is higher than in a remaining area of the cross-section, and a flow channel connecting the extruder with the die;
- generating a flow of rubber compound with the extruder and extruding therewith the rubber compound through the flow channel and the die opening;
- providing a deflector shaped as a positive obstacle in the flow channel upstream the die opening, wherein the deflector is positioned in front of the first area of the cross-section of the die opening and wherein the dimension of the cross-section of the deflector is smaller than a corresponding dimension of the first area of the cross-section of the die opening so that the flow of rubber compound is slowed down in front of the first area of the cross-section of the die.
Dependencies are inferred from the claim text.