Extrusion method and extrusion device

Details Extrusion method and extrusion device Extrusion method and extrusion device

2006-08-15

2006-08-15

Eashoo, Mark (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Of varying cross-sectional area or with intermittent...

C264S173160, C264S211210, C425S132000

Reexamination Certificate

active

07090797

ABSTRACT:
An extrusion method and an extrusion device, whereby at least two different flows of material are supplied from the extrusion device to a nozzle. The nozzle comprises at least two nozzle chambers such that the material flowing through the first nozzle chamber forms an outer part of a product, and the material flowing through the second nozzle part forms an inner part of the product. The capacity of the nozzle chambers is changed, whereby the relative proportion of the different parts of the product can be varied. When the capacity of the nozzle chamber is decreased, the amount of material flowing therethrough increases at the outlet of the nozzle, and when the capacity of the nozzle chamber is increased, the amount of material flowing out there-through decreases at the outlet of the nozzle.

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