Rotor Disk

• US 20120024999A1
• Filed: 01/07/2011
• Published: 02/02/2012
• Est. Priority Date: 01/14/2010
• Status: Active Grant

• Current Assignee: EREMA Engineering Recycling Maschinen und Anlagen Ges.m.b.H.
• Original Assignee: EREMA Engineering Recycling Maschinen und Anlagen Ges.m.b.H.
• Inventors: Hackl, Manfred, Feichtinger, Klaus, Wendelin, Gerhard
• Granted Patent: US 9,211,546 B2
• Time in Patent Office: Days
• US Class Current: 241/296
• CPC Class Codes: B02C 18/086 specially adapted for disintegrating plastics, e.g. cinematographic films for plastic bottles B02C19/0093, disintegrating plastics B29B17/00
• CPC Class Codes: B02C 18/12 with drive arranged below container B02C18/083 takes precedence
• CPC Class Codes: B02C 18/18 Knives; Mountings thereof
• CPC Class Codes: B02C 18/182 Disc-shaped knives
• CPC Class Codes: B29B 17/0412 to large particles, e.g. beads, granules, flakes, slices
• CPC Class Codes: B29B 2017/048 Cutter-compactors, e.g. of the EREMA type
• CPC Class Codes: Y02W 30/62 Plastics recycling; Rubber recycling

Abstract

The invention relates to a rotor disk (1) for inserting into a receiving container (2) for treating polymers, comprising a disk body (3), on the upper face (4) of which mixing and/or comminuting tools (5) can be provided and on the opposite lower face (6) of which a number of conveying ribs (7) extending from the inside out is provided, by means of which conveying ribs polymer particles can be conveyed outward during operation or which conveying ribs exert a force directed outward from the center (8) of the rotor disk (1) on the polymer particles caught by the conveying ribs (7) during operation. According to the invention, the thickness of the disk body (3) is reduced toward the outside.

Claims

1. Rotor disk (1) for installation in a receiving container (2) for the treatment of polymers, with a disc body (3) on whose upper face (4) mixing and/or comminuting tools (5) can be provided and on whose lower face (6) a number of conveying ribs (7) extending from the inside out is provided, by means of which conveying ribs polymer particles can be conveyed to the outside during operation or which conveying ribs exert a force directed outward from the center (8) of the rotor disk (1) on the polymer particles caught by the conveying ribs (7) during operation, characterized in that the thickness of the disk body (3) is reduced toward the outside.

2. Rotor disk according to claim 1, characterized in that the thickness of the disk body (3) is reduced by at least 1 mm, preferably by between 1.5 mm to 3.5 mm.

3. Rotor disk according to claim 1, characterized in that the conveying ribs (7) increase in height toward the outside.

4. Rotor disk according to claim 1, characterized in that the disk body (3) decreases in thickness toward the outside in the same proportion as the conveying ribs (7) increase in height toward the outside.

5. Rotor disk according to claim 1, characterized in that the overall thickness of the rotor disk (1) is equal and constant over its radius.

6. Rotor disk according to claim 1, characterized in that the thickness of the disk body (3) in an inner section (9) is constant and that it is reduced starting from a distance (18) from the center (8) of the rotor disk (1), preferably starting from a distance of 60% of the radius, and in particular from a distance (18) of 60% of the radius, preferably between 60% and 70%, and/or that the height of the conveying ribs (7) remains constant in an interior region (9) and is increased starting from a distance (18) from the center (8) of the rotor disk (1), preferably from a distance (18) of 60% of the radius, in particular from a distance of between 60% and 70%.

7. Rotor disk according to claim 1, characterized in that the points or sections of the conveying ribs (7) farthest away from the upper face (4) define or span a level plane.

8. Rotor disk according to claim 1, characterized in that the upper face (4) of the disk body (3) is a level plain and/or that the plane (10) is parallel to the upper face (4).

9. Rotor disk according to claim 1, characterized in that the lower face (6) of the disk body (3) in the area where its thickness is reduced is beveled and inclined toward the upper face (4) and/or toward the plane (10), in particular at an angle γ

of no more than 3°

, in particular between 0.4° and

0.6°

.

10. Rotor disk according to claim 1, characterized in that the reduction in thickness of the disk body (3) is continuous.

11. Rotor disk according to claim 1, characterized in that the reduction in thickness of the disk body (3) is discontinuous or in steps, where appropriate in a single step.

12. Rotor disk according to claim 1, characterized in that the conveying ribs (7) are concavely curved in rotational or running direction.

13. Rotor disk according to claim 1, characterized in that the curvatures of all conveying ribs (7) are equal and/or that the curvatures are of equal form, preferably circular.

14. Rotor disk according to claim 1, characterized in that at least two groups of conveying ribs (7) are provided which begin in alternation at different distances from the center (8), namely from an inner central region (14) and from an outer central region (15).

15. Rotor disk according to claim 1, characterized in that the outer end zones of the conveying ribs (7) are aligned almost tangentially to the edge of the rotor disk (1), in particular at outer intersecting angles α

between 0° and

25°

, preferably between 12° and

18°

, and/or that the inner beginning zones of the conveying ribs (7) are set to the inner central region (14) or the outer central region (15) at the first and second intersecting angles β

₁ or β

₂ between 0° and

45°

, preferably between 15° and

30°

, whereby the second inner intersecting angles β

₂ are preferably larger than the first intersection angles β

₁, whereby the intersecting angles are always measured between the tangents applied to the conveying ribs (7) and the tangents applied to the edge of rotor disk (1) or the inner central region (14) or the outer central region (15), in the intersecting point of these tangents or the entry points of the conveying ribs (7).

16. Rotor disk according to claim 1, characterized in that the conveying ribs (7) have a cross section that in particular is substantially triangular, with a conveying surface (11) that is straight in running direction and is substantially aligned vertically to the lower face (6), and a beveled plane flank surface (12) that is inclined downstream in running direction, whereby the flank surface (12) is aligned at an angle δ

between 10° and

35°

, in particular about 15°

.

17. Rotor disk according to claim 1, characterized in that a cavity (13) is formed in the disk body (3) which may be filled or perfused with a coolant, as appropriate.

18. Arrangement for the treatment and processing of plastic material, with a receiving container (2) having an evenly plane floor surface (17) and side walls (18), whereby near and parallel to the floor surface (17) a rotor disk (1) according to claim 1 is provided, characterized in that the rotor disk (1) is in particular supported and driven by a substantially vertically aligned shaft (19), such that the plastic material in the receiving container (2) can be moved.

19. Arrangement according to claim 18, characterized in that the distance between the outermost points or edges of the conveying ribs (7) farthest away from the disk or from the floor surface (17) is shorter that the thickness of the disk body (3) and preferably between 3 and 15 mm, preferably between 4 and 8 mm.