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US 2024/0278153 A1Published application
Filtering device for plastic materials with cleaning system
OwnerAlessandro Sartoriinventor
Life of this patent
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Abstract
A filtering device for a plastic material in the molten state includes a hollow body having a mouth and a cover; an inlet way and an outlet way for the filtered plastic material; two filters arranged side by side; a rotary cleaning device arranged between the two filters and provided with scraping elements cooperating with the filtering surfaces; and an evacuation device configured to discharge the impurities toward an evacuation outlet, the evacuation device being arranged centrally in such a way that the impurities travel along equal paths with the same flow rate and discharge the impurities in a balanced manner on the evacuation device.
Claims10
A filtering device (10;
- 110) for a plastic material in a molten state, said filtering device (10;
- 110) comprising:
- a hollow body (14) provided with a mouth (16) and a cover (20) configured to be associated with said mouth (16) to define a filtration chamber (12);
- an inlet way (22) for an introduction of said plastic material in the molten state in said filtration chamber (12), and an outlet way (24) for an outlet of said filtered plastic material in the molten state from said filtration chamber (12);
- a first filter (32) and a second filter (34) arranged side by side inside said filtration chamber (12) in a position between said inlet way (22) and said outlet way (24), said first filter (32) being configured to define a first surface (32A) adapted to filter said plastic material and collect any impurities therein and said second filter (34) being configured to define a second surface (34A) adapted to filter said plastic material and collect any impurities therein;
- a cleaning device (40) arranged between said first filter (32) and said second filter (34);
- and
- an evacuation device (80;
- 180) configured to discharge said impurities collected by said cleaning device (40) towards an evacuation outlet (82), said evacuation device (80;
- 180) being arranged centrally with respect to said cleaning device (40);
- wherein said cleaning device (40) comprises a rotary main body (42) with a first side (44) facing towards said first filter (32) and provided with first scraping elements (48) cooperating with said first surface (32A) of said first filter (32) and a second side (46) facing towards said second filter (34) and provided with second scraping elements (50) cooperating with said second surface (34A) of said second filter (34), said rotary main body (42) comprising a first plurality of axially symmetrical channels (60A, 60B, 60C) communicating with said first side (44) and a second plurality of axially symmetrical channels (70A, 70B, 70C) communicating with said second side (46) and configured to receive the impurities collected by said first scraping elements (48) and said second scraping elements (50), respectively, and to convey the impurities towards said evacuation device (80;
- 180), said first plurality of axially symmetrical channels (60A, 60B, 60C) and said second plurality of axially symmetrical channels (70A, 70B, 70C) being defined in said main body (42) staggered with respect to one another and arranged symmetrically with respect to a middle plane (M) of said main body (42) in such a way that said impurities pass through said first plurality of channels (60A, 60B, 60C) and said second plurality of axially symmetrical channels (70A, 70B, 70C) along equal paths with a same flow rate and discharge said impurities in a balanced manner on said evacuation device (80;
- 180) through discharge openings (66) arranged on said middle plane (M), thereby providing for an introduction of the impurities in said evacuation device (80;
- 180) in completely equivalent positions.
11 more elements
Dependencies are inferred from the claim text.