Device for filtering a liquefied synthetic material
View Patent ↗A device for filtering a liquid synthetic material. The device has a housing, a feed channel, a discharge channel, and backflow channels. The feed duct is subdivided into split-feed channels ( 2 A, 2 B). The cross-section of the orifice of the split-feed channels, where they open into the filter chambers, is smaller than the normal cross-section of the feed channels.
1. A device for filtering a molten material, said device comprising:
a housing;
a feed channel;
a discharge channel;
backflow channels; and
a filter slide slidably arranged in said housing, said filter slide having at least two filter chambers, each filter chamber having a filter element;
wherein said feed channel subdivides into split-feed channels that correspond in number to a number of said filter chambers, each split-feed channel having an orifice that opens into a corresponding one of said filter chambers, each split-feed channel having a minor diameter d 1 at said orifice and a major diameter d 2 of said split-feed channel, said minor diameter being smaller than said major diameter; and
wherein, said filter slide is slidably movable in a direction transverse to a direction of flow of said molten material so as to selectively allow flow of said molten material from said orifice of said split-feed channel through said respective filter chamber to said discharge channel.
2. The device according to claim 1 , wherein said discharge channel has a diameter d 3 and said feed channel a diameter d 4 , said diameter d 3 being at least equal to said diameter d 4 .
3. A device for filtering a molten material, said device comprising:
a housing;
a feed channel;
a discharge channel;
backflow channels; and
a filter slide slidably arranged in said housing, said filter slide having at least two bores, each bore providing a filter chamber and each said filter chamber having a filter element;
wherein said feed channel subdivides into split-feed channels that correspond in number to a number of said filter chambers, each split-feed channel having an orifice that opens into a corresponding one of said filter chambers, each split-feed channel having a minor diameter d 1 at said orifice and a major diameter d 2 of said split-feed channel, said minor diameter being smaller than said major diameter; and
wherein, said filter slide is slidably movable in a direction transverse to a direction of flow of said molten material so as to selectively allow flow of said molten material from said orifice of said split-feed channel through said respective filter chamber to said discharge channel.
4. The device according to claim 3 , wherein, when an outer edge of said orifice of one of said split-feed channels, said outer edge being an edge farthest from a respective one of said backflow channels, opens at an outermost edge of said filter chamber, said filter slide closes a flowpath to said respective one of said backflow channels.
5. The device according to claim 3 , wherein a length of said split-feed channel from said major diameter d 2 to said minor diameter d 1 is tapered, so as to form a tapered bottleneck at said orifice.
6. The device according to claim 3 , wherein a length of said split-feed channel from said major diameter d 2 to said minor diameter d 1 is tapered, so as to form a tapered bottleneck at said orifice.