Pelletizing device and blade head and/or grinding head for such a pelletizing device
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29B-009/06
B26D-001/16
출원번호
US-0734337
(2008-08-11)
등록번호
US-9079333
(2015-07-14)
우선권정보
DE-20 2007 014 853 U (2007-10-24)
국제출원번호
PCT/EP2008/006609
(2008-08-11)
§371/§102 date
20100426
(20100426)
국제공개번호
WO2009/052882
(2009-04-30)
발명자
/ 주소
Eloo, Michael
Veltel, Juergen
출원인 / 주소
GALA KUNSTSTOFF-UND KAUTSCHUK-MASCHINEN GMBH
대리인 / 주소
Jacobson Holman, PLLC.
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
A pelletizer, preferably in the form of an underwater pelletizer, having a cutter and/or grinding head and a tool carrier is provided. The tool carrier can rotatably be driven about a tool carrier axis of rotation, and at least one cutting and/or grinding tool, which is attached to the tool carrier
A pelletizer, preferably in the form of an underwater pelletizer, having a cutter and/or grinding head and a tool carrier is provided. The tool carrier can rotatably be driven about a tool carrier axis of rotation, and at least one cutting and/or grinding tool, which is attached to the tool carrier and is spaced from the tool carrier axis of rotation, is used to knock off plastic melt emerging from a pelletizer die plate and/or for grinding the pelletizer die plate. In one embodiment, the cutting and/or grinding tool rotates together with the tool carrier about its tool carrier axis of rotation, and in another embodiment, the cutting and/or grinding tool can rotate about its own axis of rotation relative to the tool carrier.
대표청구항▼
1. A cutting/grinding head for a pelletizer, comprising a tool carrier to be driven rotatably about a tool carrier axis of rotation, and at least one cutting/grinding tool for knocking off plastic melt emerging from melt passages of a pelletizer die plate and for grinding a surface of said pelletize
1. A cutting/grinding head for a pelletizer, comprising a tool carrier to be driven rotatably about a tool carrier axis of rotation, and at least one cutting/grinding tool for knocking off plastic melt emerging from melt passages of a pelletizer die plate and for grinding a surface of said pelletizer die plate, said at least one cutting/grinding tool being rotatably mounted on said tool carrier about an axis of rotation spaced from the tool carrier axis of rotation, said axis of rotation of said at least one cutting/grinding tool extending substantially parallel to the tool carrier axis of rotation and substantially perpendicular to the die plate surface, said at least one cutting/grinding tool positioned on an outlet side of said die plate and including a substantially planar end face extending perpendicular to said axis of rotation of said at least one cutting/grinding tool for bearing against said pelletizer die plate outlet side to knock off or cut strands of plastic melt emerging from the die plate melt passages, said planar end face of said at least one cutting/grinding tool being provided with an abrasive coat to grind the die plate, and said at least one cutting/grinding tool being rotatably supported on said tool carrier free from a rotatory drive in a freely self-rotating manner. 2. The cutting/grinding head according to claim 1, wherein the tool carrier includes an adjusting device for adjusting distance of the axis of rotation of said at least one cutting/grinding tool from the tool carrier axis of rotation. 3. The cutting/grinding head according to claim 2, wherein the adjusting device includes a swivel arm, pivotally mounted on the body of the tool carrier and carries said at least one cutting/grinding tool together with its axis of rotation. 4. The cutting/grinding head according to claim 3, wherein a fixing element is provided for fixing the swivel arm in at least two different swivel positions relative to the body of the tool carrier. 5. The cutting/grinding head according to claim 1, wherein the at least one cutting/grinding tool is formed symmetrical with respect to its axis of rotation and includes a plurality of segments configured to be congruently transferred into each other by rotating about the axis of rotation of said at least one cutting/grinding tool. 6. The cutting/grinding head according to claim 1, wherein the at least one cutting/grinding tool includes a rotationally symmetric working head with a circular cross-section. 7. The cutting/grinding head according to claim 1, wherein the at least one cutting/grinding tool includes a working head with a cross-section differing from a circular shape, wherein the working head is divided into a plurality of substantially congruent peripheral segments. 8. The cutting/grinding head according to claim 7, wherein the working head has a blossom- or flower-shaped contour with a plurality of arcuate peripheral segments. 9. The cutting/grinding head according to claim 7, wherein the working head has a traverse-shaped contour with rounded transitions between polygon portions. 10. The cutting/grinding head according to claim 1, wherein the at least one cutting/grinding tool includes a working head with a peripheral flank constituting a cutting/knock-off edge, wherein the cutting/knock-off edge is formed to extend around the axis of rotation of said at least one cutting/grinding tool. 11. The cutting/grinding head according to claim 10, wherein the cutting/knock-off edge is formed rotationally symmetric with respect to the axis of rotation of said at least one cutting/grinding tool and/or segmentally congruent with respect to the axis of rotation of said at least one cutting/grinding tool. 12. The cutting/grinding head according to claim 10, wherein the peripheral flank of the working head of the at least one cutting/grinding tool has a straight flank extension as viewed in a longitudinal section including the axis of rotation of said at least one cutting/grinding tool. 13. The cutting/grinding head according to claim 10, wherein the peripheral flank of said working head includes a flank angle between 110° and 30°, with respect to an end-face plane of said working head that is vertical to the axis of rotation of said at least one cutting/grinding tool. 14. The cutting/grinding head according to claim 1, wherein a plurality of cutting/grinding tools are provided spaced from each other in a peripheral direction around the tool carrier axis of rotation. 15. The cutting/grinding head according to claim 1 in combination with a pelletizer, said pelletizer die plate having at least one melt passage which is arranged in a vicinity of a path of circulation of the at least one cutting/grinding tool of the cutter and/or grinding head. 16. A pelletizer assembly comprising: a pelletizer having a die plate with melt passages through which plastic melt is extruded;a cutting/grinding head including, a tool carrier to be driven rotatably about a tool carrier axis of rotation; andat least one cutting/grinding tool operatively associated with said tool carrier for knocking off plastic melt emerging from the melt passages of said pelletizer die plate and for grinding said pelletizer die plate, said at least one cutting/grinding tool being rotatably mounted on said tool carrier about an axis of rotation spaced from the tool carrier axis of rotation and configured to be positioned substantially perpendicular to the die plate, said at least one cutting/grinding tool positioned adjacent an outlet side of said die plate and including a substantially planar end face extending perpendicular to said cutting/grinding tool axis of rotation for bearing against said pelletizer die plate outlet side to knock off or cut strands of plastic melt emerging from the melt passages in the die plate, said end face of said at least one cutting/grinding tool being abrasive so that said end face grinds a surface of the outlet side of the die plate during operation of the pelletizer, and said at least one cutting/grinding tool being configured to be rotatably supported on said tool carrier free from a rotatory drive in a freely self-rotating manner. 17. The pelletizer according to claim 16, wherein said at least one cutting/grinding tool includes a working head having said substantially planar end face and a peripheral flank constituting a cutting/knock-off edge, said cutting/knock-off edge being formed to extend around the axis of rotation of said at least one cutting/grinding tool, the peripheral flank having a flank angle between 90° and 45° with respect to the substantially planar end face. 18. The pelletizer according to claim 16, wherein said axis of rotation of said at least one cutting/grinding tool extends substantially parallel to the tool carrier axis of rotation. 19. A cutting/grinding head for a pelletizer having a die plate with melt passages therethrough, comprising a tool carrier to be driven rotatably about a tool carrier axis of rotation, and at least one cutting/grinding tool positioned adjacent an outlet side of said die plate and including a substantially cylindrical contour with a substantially flat end face and a peripheral flank, said at least one cutting/grinding tool configured to be mounted to said tool carrier free from a rotatory drive in a freely self-rotating manner and configured to be positioned substantially perpendicular to a die plate surface, said end face of said at least one cutting/grinding tool being perpendicular to said axis of rotation for bearing against said pelletizer die plate outlet side and said peripheral flank having a cutting/knock-off edge that cuts off strands of plastic melt emerging from the melt passages on the outlet side of the pelletizer die plate, said peripheral flank having a flank angle between 90° and 45° with respect to the flat end face of said at least one cutting/grinding tool, said end face of said at least one cutting/grinding tool being abrasive so that said end face grinds a surface of the outlet side of the die plate during operation of the pelletizer. 20. The cutting/grinding head according to claim 19 in combination with a pelletizer, said melt passages of said pelletizer die plate including at least one melt passage which is arranged in a vicinity of a path of circulation of the at least one cutting/grinding tool of the cutting/grinding head.
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이 특허에 인용된 특허 (10)
Voigt Jurgen (Wathlingen DEX), Apparatus for pelletizing plastics.
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