Method and tool for the cylindrical deformation of an Al sleeve to the core dimension of the internal plastic closure, as preparation for a diffusion-proof press connection within the two components
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B21D-039/04
B21D-019/06
B21D-051/26
B21D-051/54
B23P-011/00
A61M-015/00
출원번호
US-0122867
(2009-10-08)
등록번호
US-9132467
(2015-09-15)
우선권정보
EP-08166264 (2008-10-09)
국제출원번호
PCT/EP2009/063063
(2009-10-08)
§371/§102 date
20110719
(20110719)
국제공개번호
WO2010/040791
(2010-04-15)
발명자
/ 주소
Spreitzer, Joerg
Hahn, Christoph
Huebner, Michael
Mathe, Gerald
Funke, Peter
Pusch, Ruediger
출원인 / 주소
Boehringer Ingelheim International GmbH
대리인 / 주소
Morris, Michael P.
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
In a method of producing a connection between the neck area of a light metal cartridge, particularly an aluminium cartridge, and a plastic container inserted therein, by a drawing process that forms a connection area and applies areas of the wall of the light metal cartridge against the plastic cont
In a method of producing a connection between the neck area of a light metal cartridge, particularly an aluminium cartridge, and a plastic container inserted therein, by a drawing process that forms a connection area and applies areas of the wall of the light metal cartridge against the plastic container using a rotating main body (15) of a drawing tool (2), said main body supporting at least one profiled drawing roller (3) which can rotate about a rotation axis (5) in order to delimit a tool working opening (1), wherein the drawing roller (3) lies against the outer surface of the light metal cartridge, the rotation axis (5) of the drawing roller (3) is arranged at a tool-internal end area of a lever (9) arranged transversely relative to the longitudinal axis (16) of the drawing tool (2), said lever being supported at its opposite tool-external end area on the drawing tool (2) so as to be pivotable about a pivot axis (11) in a force-controlled manner and so as to apply the drawing roller (3) against the outer surface of the light metal cartridge.
대표청구항▼
1. A method of producing a connection between the neck area of a light metal cartridge and a plastic container inserted therein, by a drawing process, the method comprising: providing a rotating main body (15) of a drawing tool (2), said main body rotating about a centrally located longitudinal axis
1. A method of producing a connection between the neck area of a light metal cartridge and a plastic container inserted therein, by a drawing process, the method comprising: providing a rotating main body (15) of a drawing tool (2), said main body rotating about a centrally located longitudinal axis (16), the main body supporting at least three profiled drawing rollers (3) which are each rotatable about respective rotation axes (5) in order to delimit a tool working opening (1), where each of the rotation axes (5) are parallel to, and radially spaced away from, the longitudinal axis (16) of the main body,inserting the light metal cartridge, with the plastic container disposed therein, into the tool working opening (1),pressing the drawing rollers (3) toward the centrally located longitudinal axis (16) such that each of the rotation axes (5) are biased radially toward, and remain parallel to, the longitudinal axis (16) of the main body, and such that the drawing rollers (3) are pressed against an outer surface of the light metal cartridge, wherein each of the rotation axes (5) of the respective drawing rollers (3) is arranged at a respective tool-internal end area of a respective lever (9), wherein each lever (9) extends transversely relative to the longitudinal axis (16) of the drawing tool (2), and wherein each lever (9) is supported on the drawing tool (2) at a respective opposing tool-external end area so that each lever (9) is pivotable about a pivot axis (11) in a force-controlled manner and so that each of the drawing rollers (3) is pressed against the outer surface of the light metal cartridge, androtating the main body (15) about the centrally located longitudinal axis (16), while the drawing rollers (3) are engaged against the outer surface of the light metal cartridge, such that each of the respective rotation axes (5) rotate about, and remain parallel to, the centrally located longitudinal axis (16) while each drawing roller (3) rotates about its rotation axis (5), thereby forming a connection area and applying areas of a wall of the light metal cartridge against the plastic container using the drawing tool (2). 2. The method according to claim 1, further comprising providing a force on the tool-external end area of each lever (9) to pivot each lever (9), thereby producing a respective pivoting movement covering a respective pivot angle, and a resultant force-controlled application of each drawing roller (3) against the outer surface of the light metal cartridge. 3. The method according to claim 1, wherein the plastic container is connected in gastight manner to the light metal cartridge in one or more subsequent steps and is filled with a pharmaceutical active substance formulation and sealed, and/or the light metal cartridge and the plastic container are then further processed to form an inhaler cartridge for use in an inhaler. 4. The method according to claim 1 wherein the drawing tool (2) comprises a rotatable main body (15) having at least one profiled drawing roller (3) arranged on a circular track and rotatable about a rotation axis (5), wherein the drawing roller (3) delimits a tool working opening (1) and can be moved out of a position that defines a minimum tool working opening (1), enlarging the diameter of the tool working opening (1), counter to the force of a spring (17), into a position that defines a maximum tool working opening, characterised in that the rotation axis (5) of the drawing roller (3) is arranged on a tool-internal end area of a lever (9) aligned transversely with respect to the longitudinal axis (16) of the drawing tool (2), said lever (9) being supported at its opposite tool-external end area on the drawing tool (2) so as to be pivotable about a pivot axis (11) in a force controlled manner and so as to apply the drawing roller (3) against the outer surface of the workpiece introduced into the tool working opening (1). 5. The method according to claim 1, wherein the light metal cartridge is an aluminium cartridge. 6. A drawing tool which comprises: a main body (15) that is rotatable about a centrally located longitudinal axis (16);at least three profiled drawing rollers (3) coupled to the main body and located at uniform angular spacings from one another around the longitudinal axis (16), each drawing roller (3) being rotatable about a respective rotation axis (5), where each of the rotation axes (5) are parallel to, and radially spaced away from, the longitudinal axis (16) of the main body;a mounting mechanism configured to orient each of the drawing rollers (3) such that: (i) each rotation axis (5) remains substantially parallel to the longitudinal axis (16) of the main body (15), and (ii) the drawing rollers (3) are radially slidable toward, and away from, the longitudinal axis (16), thereby defining a tool working opening (1) between the drawing rollers (3) that is movable between a minimum tool working opening and a maximum tool working opening;at least three levers (9), each lever (9) being elongate in a longitudinal dimension aligned transversely with respect to the longitudinal axis (16) of the main body (15) of the drawing tool (2), an inner end of each lever (9) being coupled to a respective one of the drawing rollers (3), and an opposite outer end of each lever (9) being supported so as to be pivotable about a respective pivot axis (11) and thereby move the drawing rollers (3) between the minimum tool working opening and the maximum tool working opening; andone spring (17) applying a biasing force to the at least three levers (9) that urges the drawing rollers (3) toward the minimum tool working opening in a force controlled manner and so as to urge the drawing rollers (3) against the outer surface of a workpiece introduced into the tool working opening (1). 7. The drawing tool according to claim 6, wherein the biasing force induced by the spring (17) acts on the outer end of each lever (9), such that each lever (9) is pivotable about the respective pivot axis (11) and the drawing rollers (3) moveable between the minimum tool working opening and the maximum tool working opening. 8. The drawing tool according to claim 6, further comprising: an annular disc (13) attached to the main body (15) and rotatable about the longitudinal axis (16), wherein:the outer end of each lever (9) is coupled to the annular disc (13) such that the inner end of each lever (9) rotates about the respective pivot axis (11) in response to rotation of the annular disc (13) about the longitudinal axis (16);the spring (17) applies the biasing force to the levers (9) by way of applying a rotational force to the annular disc (13); andthe annular disc (13) being rotatable in parts counter to the rotational force of the spring (17) and insertion movement of each drawing roller (3) being achievable by a back-rotation of the annular disc (13) via the rotational force. 9. The drawing tool according to claim 6, wherein the respective pivot axis (11) of each lever (9) is formed in the outer end thereof and through a centre of an eccentrically mounted sleeve (12) which engages the annular disc (13). 10. The drawing tool according to claim 6, wherein a respective further pivot axis (10) is formed in a region of each of the at least three drawing rollers (3). 11. The drawing tool according to claim 10, wherein the respective pivot axis (11) and respective further pivot axis (10) of each lever (9) and the rotation axis (5) of a respective one of the drawing rollers (3) are aligned laterally offset from one another. 12. The drawing tool according to claim 11, wherein a respective distance between the respective further pivot axis (10) in the region of a respective one of the drawing rollers (3) and the respective rotation axis (5) thereof forms a respective lever arm. 13. The drawing tool according to claim 12, wherein each lever arm has a lever ratio of 1:28 between such lever arm and a respective one of the at least three levers (9). 14. The drawing tool according to claim 11, wherein each further pivot axis (10) supports the respective drawing roller (3) in an eccentrically movable manner and the respective drawing roller (3) is rotatably mounted by respective bearing flanges (7) of a bearing block that is attached to the drawing tool and is mounted in a rotation-locked manner on the respective lever (9). 15. The drawing tool according to claim 6, wherein each of the drawing rollers (3) is movable by 0.3 mm in response to a pivot angle of 22° of each lever (9). 16. The drawing tool according to claim 6, wherein the at least three drawing rollers (3) include five drawing rollers (3), arranged on the main body (12), at a uniform spacing from one another, delimiting the tool working opening (1).
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