Method and device for extrusion of hollow pellets
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29C-047/00
B29B-009/06
B29B-009/00
B29C-047/12
B30B-011/22
B29B-009/12
B29D-022/00
B29C-047/30
B29K-105/00
출원번호
US-0993062
(2009-05-15)
등록번호
US-8834760
(2014-09-16)
국제출원번호
PCT/US2009/044220
(2009-05-15)
§371/§102 date
20101215
(20101215)
국제공개번호
WO2009/140643
(2009-11-19)
발명자
/ 주소
Martin, J. Wayne
Wright, Roger Blake
출원인 / 주소
Gala Industries, Inc.
대리인 / 주소
Troutman Sanders LLP
인용정보
피인용 횟수 :
1인용 특허 :
23
초록▼
Described herein are extrusion processes to produce hollow pellets. Also disclosed are pelletizer devices that can be used to produce the hollow pellets. The processes and devices make use of an extrusion die having a die orifice and an insert that is placed in the die orifice to produce the hollow
Described herein are extrusion processes to produce hollow pellets. Also disclosed are pelletizer devices that can be used to produce the hollow pellets. The processes and devices make use of an extrusion die having a die orifice and an insert that is placed in the die orifice to produce the hollow pellets.
대표청구항▼
1. An extrusion process for producing hollow pellets, the process comprising: extruding molten material through an extrusion die comprising a die orifice and an insert disposed in the die orifice, wherein the insert comprises a mandrel and three or more distinct fins extending a length of the insert
1. An extrusion process for producing hollow pellets, the process comprising: extruding molten material through an extrusion die comprising a die orifice and an insert disposed in the die orifice, wherein the insert comprises a mandrel and three or more distinct fins extending a length of the insert, the fins maintaining the position of the insert in the die orifice, and wherein at least one of the three or more distinct fins of the insert is tapered; andcooling the extruded molten material effective to produce a pellet having a hollow cavity. 2. The process of claim 1, wherein the hollow cavity penetrates a first surface of the pellet and continuously extends through a second surface of the pellet. 3. The process of claim 1, wherein the hollow cavity is completely encapsulated within the pellet. 4. The process of claim 1, wherein the hollow cavity penetrates a first surface of the pellet and extends inwardly to an interior portion of a body of the pellet. 5. The process of claim 1, wherein the extruding comprises pressure extruding. 6. The process of claim 1, wherein the molten material comprises a polyolefin, a cross-linkable polyolefin, vinyl polymer, substituted vinyl polymer, polyester, polyamide, polyether, polythioether, polyurethane, polyimide, polycarbonate, polysulfide, polysulfone, wax, a copolymer thereof, or a formulation comprising at least two of the foregoing. 7. The process of claim 1, wherein the extrusion die is a single-body extrusion die or a removable extrusion die assembly. 8. The process of claim 1, wherein each of the three or more distinct fins are disposed about 180° or less apart from an adjacent fin about the mandrel. 9. The process of claim 1, wherein the three or more distinct fins are at least partially on the mandrel. 10. An extrusion process for producing hollow pellets, the process comprising: feeding a molten material into a pelletizer;extruding the molten material through an extrusion die of the pelletizer using pressure, wherein the extrusion die comprises a die orifice and an insert disposed in the die orifice, wherein the insert comprises a mandrel and three or more distinct fins extending a length of the insert, the fins maintaining the position of the insert in the die orifice, wherein at least one of the three or more distinct fins is tapered; andcooling the extruded molten material effective to produce a pellet having a hollow cavity, wherein the hollow cavity penetrates a first surface of the pellet and continuously extends through a second surface of the pellet, is completely encapsulated within the pellet, or penetrates the first surface of the pellet and extends inwardly to an interior portion of a body of the pellet. 11. The process of claim 10, wherein the extrusion die is a single-body extrusion die or a removable extrusion die assembly. 12. The process of claim 10, wherein the extrusion die comprises a plurality of die orifices through which the molten material is extruded, wherein each die orifice of the plurality of die orifices comprises the insert. 13. The process of claim 10, wherein the pelletizer is an underwater pelletizer. 14. The process of claim 10, wherein the three or more distinct fins are at least partially on the mandrel.
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Makoto Murata JP; Koji Hasegawa JP; Masatoshi Enomoto JP, Method for manufacturing an extruded article changing in cross-section and an apparatus for extruding said extruded article.
Gauchel Peter (Alzenbach DEX) Wissinger Waldemar (Siegburg DEX), Process and apparatus for the extrusion of coated skein-shaped profiles, preferably of thermoplastic synthetic resins.
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