Overturning device for overturning molten material and purging method
AssigneeWindmoller & Holscher
InventorsMartin BACKMANN, Hermann-Josef JÄCKERING, Markus BUSSMANN, Bernd LIESBROCK, Karsten GOLUBSKI
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Abstract
The present invention relates to an overturning device (10) for overturning a molten material (200) in a melt channel (110) comprising a melt inlet (20) and a melt outlet (30), wherein between the melt inlet (20) and the melt outlet (30) at least one melt guiding means (40) is assembled for a rearrangement of molten material (200) from the centre (22) of the melt inlet (20) to the edge (34) of the melt outlet (30) and for a rearrangement of molten material (200) from the edge (24) of the melt inlet (20) into the centre (32) of the melt outlet (30).
Claims15
An overturning device for overturning a molten material in a melt channel comprising:
- a melt inlet, a melt outlet, and at least one melt guide between the melt inlet and the melt outlet for a rearrangement of the molten material from a centre of the melt inlet to an edge of the melt outlet and for a rearrangement of the molten material from the edge of the melt inlet into the centre of the melt outlet.
A blow head for performing a blow film extrusion method comprising:
- at least a melt channel for conveying of molten material to a blow output of the blow head, wherein in the at least one melt channel at least one overturning device for overturning a molten material in a melt channel comprising a melt inlet, a melt outlet, and at least one melt guide between the melt inlet and the melt outlet for a rearrangement of molten material from a centre of the melt inlet to an edge of the melt outlet and for a rearrangement of molten material from the edge of the melt inlet into the centre of the melt outlet is assembled.
A method for the performance of a purge process in an extrusion device comprising:
- introducing of a molten material in a melt inlet of an overturning device,
- rearranging of molten material from a centre of the melt inlet to an edge of a melt outlet of the overturning device, and
- rearranging of molten material from the edge of the melt inlet into the centre of the melt outlet.
Dependencies are inferred from the claim text.