Overturning device for overturning molten material and purging method
AssigneeWindmoller & Holscher
InventorsMartin Backmann, Hermann-Josef Jäckering, Markus Bussmann, Bernd Liesbrock, Karsten Golubski
Life of this patent
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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, the overturning device comprising:
- a melt inlet;
- a melt outlet;
- and
- at least one melt guide, wherein between the melt inlet and the melt outlet the at least one melt guide is assembled for a rearrangement of molten material from a center of the melt inlet to an edge of the melt outlet and for a rearrangement of molten material from an edge of the melt inlet into a center of the melt outlet,
- wherein the at least one melt guide comprises a separation section with a first separation channel and a second separation channel, wherein a division section configured to separate the molten material is located proximal the separation section and a combination section configured to merge the molten material is located distal the separation section, and
- wherein the first separation channel and the second separation channel are each configured in a torus shape.
A blow head for performing a blow film extrusion method comprising:
- a melt channel for conveying molten material to a blow output of the blow head;
- and
- 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 located between the melt inlet and the melt outlet for a rearrangement of molten material from a center of the melt inlet to an edge of the melt outlet and for a rearrangement of molten material from an edge of the melt inlet into a center of the melt outlet is assembled,
- wherein the at least one melt guide comprises a separation section with a first separation channel and a second separation channel, wherein a division section configured to separate the molten material is located proximal the separation section and a combination section configured to merge the molten material is located distal the separation section, and
- wherein the first separation channel and the second separation channel are each configured in a torus shape.
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 for overturning a molten material in a melt channel comprising a melt inlet, a melt outlet and at least one melt guide located between the melt inlet for a rearrangement of molten material from a center of the melt inlet to an edge of the melt outlet and for a rearrangement of molten material from an edge of the melt inlet into a center of the melt outlet,
- wherein the at least one melt guide comprises a separation section with a first separation channel and a second separation channel, wherein a division section configured to separate the molten material is located proximal in front of the separation section a division section for separating the molten material to the first separation channel and the second separation channel and a combination section configured to merge the molten material is located distal after the separation section a combination section for merging the molten material from the first separation channel and the second separation channel is arranged, wherein the first separation channel and the second separation channel are each configured in a torus shape,
- rearranging of the molten material from the center of the melt inlet to the edge of the melt outlet of the overturning device, and
- rearranging of the molten material from the edge of the melt inlet into the center of the melt outlet.
An overturning device for overturning a molten material in a melt channel, the overturning device comprising:
- a melt inlet;
- a melt outlet;
- and
- at least one melt guide between the melt inlet and the melt outlet, wherein the at least one melt guide is assembled for a rearrangement of molten material from the center of the melt inlet to the edge of the melt outlet and for a rearrangement of molten material from the edge of the melt inlet into the center of the melt outlet,
- wherein the at least one melt guide comprises a separation section with a first separation channel and a second separation channel, wherein a division section configured to separate the molten material is located proximal the separation section and a combination section configured to merge the molten material is located distal the separation section, and
- wherein the first separation channel and the second separation channel are spirally interwoven with one another.
Dependencies are inferred from the claim text.