Nozzle for an extruder with variable flow control
AssigneesCompagnie Generale Des Etablissements Michelin, Michelin Recherche et Technique S.A.
InventorsJames FORTNER, John HOMMERSON, Michael PETROVICH
Life of this patent
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Abstract
A nozzle is provided for controlling the flow of extruded material, such as e.g., rubber material, from an extrusion machine. Movable pins are positioned into the path of material flow through an internal cavity. The pins are arranged across the path of flow upstream of the extrusion die. By moving the pins in and out, the flow of material through the cavity can be controlled at different locations across the width of the path of flow to the die. Manual and automatic controls can be provided for determining the position of the pins and thereby controlling the flow.
Claims18
A nozzle for controlling extruded material flowing from an extrusion machine, comprising:
- a main body defining a cavity for the receipt of material flowing into the nozzle;
- an inlet connected with the cavity so as to allow extruded material to flow into the cavity;
- a plurality of channels connected with the cavity to allow for the flow of extruded material out of the cavity and through each of the channels, the plurality of channels arranged adjacent to each other along a first direction of the nozzle;
- and
- a plurality of pins, each pin associated with at least one channel and movable in and out of the channel such that the flow of material through each channel can be selectively adjusted by controlling the amount of obstruction of the channel with the pin.
Dependencies are inferred from the claim text.