Tubular member extrusion method and tubular member extrusion apparatus
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29C-053/08
B29C-047/22
B29C-047/24
B29C-047/28
B29C-047/00
B29K-021/00
B29L-023/00
출원번호
US-0911062
(2010-10-25)
등록번호
US-8956559
(2015-02-17)
우선권정보
JP-2009-248353 (2009-10-29)
발명자
/ 주소
Kimura, Yoji
Sato, Kyohei
Yamaguchi, Hiroshi
Miura, Yukio
출원인 / 주소
Toyoda Gosei Co., Ltd.
대리인 / 주소
Posz Law Group, PLC
인용정보
피인용 횟수 :
1인용 특허 :
9
초록▼
According to a fabrication method, an extruded tubular member HA is formed, using an extrusion die 23 which has an extrusion orifice 25 having an opening-side inner circumferential surface 25a having a circular section and a core-side die 26 disposed concentrically with the extrusion orifice 25, by
According to a fabrication method, an extruded tubular member HA is formed, using an extrusion die 23 which has an extrusion orifice 25 having an opening-side inner circumferential surface 25a having a circular section and a core-side die 26 disposed concentrically with the extrusion orifice 25, by extruding a tube material through an extrusion passage 27 defined between the opening-side inner circumferential surface 25 and a core-side outer circumferential surface 26d of the core-side die 26. As this occurs, a bent configuration is given to the extruded tubular member HA by changing contact areas where the tube material contacts the opening-side inner circumferential surface 25a and the core-side outer circumferential surface 26d in a circumferential direction so as to set velocities at which the tube material is extruded to different values in the circumferential direction by controlling the position of the core die 26 in rotating and axial directions relative to the extrusion orifice 25.
대표청구항▼
1. A method for forming an extruded tubular member having a three-dimensionally curved shape and two or more different radiuses of curvature, which comprises: introducing a material into an extrusion die having an extrusion orifice, the extrusion orifice having an inner circumferential surface that
1. A method for forming an extruded tubular member having a three-dimensionally curved shape and two or more different radiuses of curvature, which comprises: introducing a material into an extrusion die having an extrusion orifice, the extrusion orifice having an inner circumferential surface that is disposed at an opening-side of the extrusion orifice and has a circular section, and a core-side die disposed concentrically with the extrusion orifice, the core-side die having a distal end portion terminating in an inclined plane which results when a circular cylinder is cut obliquely through an entire cross-sectional area of the circular cylinder;continuously extruding a tube of the material through an extrusion passage defined between the inner circumferential surface and an outer circumferential surface of the core-side die; andbending the extruding tube material by changing contact areas where the extruding tube material contacts the inner circumferential surface and the outer circumferential surface in a circumferential direction and setting velocities at which the tube material is extruded through the extrusion orifice to different values in the circumferential direction while adjusting positions of the inclined plane of the distal end portion of the core-side die in rotating and axial directions relative to the extrusion orifice using a die position control mechanism. 2. The method for forming an extruded tubular member according to claim 1, further comprising moving and repositioning the inclined plane of the distal end portion of the core-side die while continuously extruding and bending the extruded member and forming an extruded tubular member having two radiuses of different curvature. 3. The method for forming an extruded tubular member according to claim 1, which further comprises changing the velocities of the extruding tube material in the circumferential direction during the continuously extruding and bending steps and forming an extruded tubular member having the two radiuses of different curvature. 4. The method for forming an extruded tubular member according to claim 3, wherein the step of changing the velocities of the continuously extruding material in the circumferential direction is achieved by rotating the inclined plane of the distal end portion of the core-side die by operation of the die position control mechanism. 5. The method for forming an extruded tubular member according to claim 1, which includes: adjusting the inclined plane of the distal end portion of the core-side die relative to the extrusion orifice to set equal contact areas where the extruding tube material contacts the inner circumferential surface and the outer circumferential surface in a circumferential direction and extruding the extruding tube material at the same velocity along the circumferential direction, andforming the extruded tubular member having a section with a straight cylindrical shape. 6. The method for forming an extruded tubular member according to claim 5, wherein: after forming the extruded tubular member having a section with a straight cylindrical shape,moving the inclined plane of the distal end portion of the core-side die to a position where the contact areas of the extruding tube material with the core-side outer circumferential surface and the opening-side inner circumferential surface are different, andforming the extruded member having a section with a bent shape. 7. The method for forming an extruded tubular member according to claim 1, wherein the tube material is rubber. 8. The method for forming an extruded tubular member according to claim 1, wherein the tube material is metal. 9. The method for forming an extruded tubular member according to claim 1, wherein the tube material is an elastomer. 10. A method for forming an extruded tubular member having at least two or more different radiuses of curvature including at least one straight section and at least one curved section with a three-dimensionally curved shape, which comprises: introducing a material into an extrusion die having an extrusion orifice, the extrusion orifice having an inner circumferential surface that is disposed at an opening-side of the extrusion orifice and has a circular cross section, and a core-side die disposed concentrically with the extrusion orifice, the core-side die having a distal end portion terminating in an inclined plane which results when a circular cylinder is cut obliquely through an entire cross-sectional area of the circular cylinder;continuously extruding a tube of the material through an extrusion passage defined between the inner circumferential surface of the extrusion orifice and an outer circumferential surface of the core-side die, which comprises: initially extruding the tube material through the extrusion orifice at velocities that provide the extruding tube with one of the straight section and the curved section, the velocities being determined by contact areas where a circumferential surface of the extruding tube material contacts the inner circumferential surface of the extrusion orifice and the outer circumferential surface of the core-side die, andadjusting the contact areas by at least one of rotating and axially moving the inclined plane of the distal end portion of the core-side die relative to extrusion orifice, changing the velocities at which the tube material is extruded through the extrusion orifice to different values and extruding the tube material to have the other of the straight section and the curved section.
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이 특허에 인용된 특허 (9)
Kawaguchi Takahisa (Chiba JPX), Apparatus for forming bent portion of pipe in apparatus for making bent pipe.
Tonsi Lodovico (Sesto S. Giovanni ITX) Pozzati Giovanni (Olgiate Olona ITX), Extruder head for applying coatings of polymeric material to semifinished products of elongated cylindrical conformation.
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.
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