Extrusion method and extrusion device
AssigneeConenor Oy
InventorKari Kirjavainen
Life of this patent
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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.
Claims14
An extrusion method for producing a product comprising at least two different materials whose relative proportion varies in the product the method comprising
- providing an extrusion device comprising a nozzle and supplying means for supplying material through the nozzle, the nozzle comprising at least a first nozzle chamber and a second nozzle chamber such that the material flowing through the first nozzle chamber forms an outer part of the product and the material flowing through the second nozzle chamber forms an inner part of the product,
- supplying at least two different materials through the nozzle and
- adjusting the capacities of the nozzle chambers such that when the nozzle chamber decreases the amount of material flowing there-through increases at the outlet of the nozzle and when the capacity of the nozzle chamber increases the amount of material flowing therethrough decreases at the outlet of the nozzle.
An extrusion device comprising a nozzle, the nozzle comprising at least a first nozzle chamber and a second nozzle chamber such that the material flowing through the first nozzle chamber forms an outer part of a product to be produced and the material flowing through the second nozzle chamber forms an inner part of the product, means for extruding at least two different materials through the nozzle and means for adjusting the capacities of the nozzle chambers such that 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 therethrough decreases at the outlet of the nozzle.
Dependencies are inferred from the claim text.