IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0497232
(2002-12-05)
|
등록번호 |
US-7396221
(2008-07-08)
|
우선권정보 |
IT-RE2001A000119(2001-12-12) |
국제출원번호 |
PCT/EP02/013877
(2002-12-05)
|
§371/§102 date |
20050208
(20050208)
|
국제공개번호 |
WO03/053649
(2003-07-03)
|
발명자
/ 주소 |
- Bergami,Stefano
- Zuffa,Zeno
|
출원인 / 주소 |
- Sacmi Cooperativa Meccanici Imola Soc. Coop. A.R.L.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
5 |
초록
▼
The mould comprises a punch (10) having an outer surface (11') arranged to engage the container tubular body (51) as an exact fit, and an end portion (13) projecting axially from the lower end of the cylindrical outer surface (11 '), and a die (30) arranged to form, in combination with the lower sur
The mould comprises a punch (10) having an outer surface (11') arranged to engage the container tubular body (51) as an exact fit, and an end portion (13) projecting axially from the lower end of the cylindrical outer surface (11 '), and a die (30) arranged to form, in combination with the lower surface (13') of the punch, a cavity (F) for forming the headpiece (52) of the container; the die (30) has a concave surface (32') arranged to receive as an exact fit, by axial penetration, the lower end of the cylindrical outer surface (11') of the punch together with the lower end of the tubular body (51) of the container. The headpiece (52) is formed within the forming cavity (F). According to the invention, the punch (10') comprises a radial deformation means (22, 25, 62, 65), positioned on its outer surface (11') and extending annularly along the entire circumference of this surface to act on the tubular body (51) of the container, and is arranged to assume a normal position in which its outer surface does not project radially from the cylindrical outer surface (11') of the punch, and an active position in which it is urged in a centrifugal direction in such a manner as to press the tubular body (51) against the opposing surface of the die, means being provided to urge the radial deformation means (22, 25, 62, 65) in the centrifugal direction during the forming of the container headpiece (52).
대표청구항
▼
The invention claimed is: 1. A mould for forming the top of deformable tubular plastic containers comprising a tubular body (51) and a headpiece (52) of plastic material bonded to one end of the tubular body (51 ), the mould comprising: a punch (10) having an outer surface (11') arranged to engage
The invention claimed is: 1. A mould for forming the top of deformable tubular plastic containers comprising a tubular body (51) and a headpiece (52) of plastic material bonded to one end of the tubular body (51 ), the mould comprising: a punch (10) having an outer surface (11') arranged to engage the container tubular body (51) as an exact fit, and an end portion (13) projecting axially from the lower end of the cylindrical outer surface 8 (11') and a die (30) arranged to form, in combination with the lower surface (13') of the punch, a cavity (F) for forming the headpiece (52) of the container, said die (30) having a concave surface (32') arranged to receive as an exact fit, by axial penetration, the lower end of the cylindrical outer surface (11') of the punch together with the lower end of the tubular body (51) of the container, the headpiece (52) being formed within the forming cavity (F) and being pressure-bonded therein to the lower end of the tubular body (51), the punch (10)/die (30) comprising a radial deformation means (22, 20 25, 62, 65), positioned on its outer surface (11')/concave surface (32'), which extends annularly along the entire circumference of this surface to act on the tubular body (51) of the container, and is arranged to assume a normal position in which its outer surface does not project radially from the cylindrical outer surface (11') of the punch/from the concave surface (32') of the die (30), and an active position in which it is urged in a radial direction in such a manner as to press the tubular body (51) against the opposing surface of the die/punch, characterised in that said radial deformation means are positioned within an annular chamber (21, 61) which is provided in the punch (10)/die (30), is open towards the cylindrical outer surface (11') of the punch/the concave inner surface (32') of the die, and is in the form of a flexible annular element (22, 62) positioned to close the annular chamber (21, 61) but with its outer surface not normally projecting from the annular chamber (21, 61), said annular element (22, 62) being arranged to deform radially until it presses the tubular body (51) against the opposing surface (32') of the die (30)/against the opposing surface (11') of the punch, as the result of feeding pressurised fluid into the chamber (21, 61). 2. A mould as claimed in claim 1, characterised in that said flexible annular element (22, 62) acts by directly contacting the tubular body (51) of the container. 3. A mould as claimed in claim 1, characterised in that said flexible annular element (22, 62) is in the form of a sleeve of elastomeric material, the section through which is relatively narrow and elongate in a longitudinal direction. 4. A mould as claimed in claim 3, characterised in that the cross section through said flexible annular element (22, 62) comprises an intermediate larger/narrower-diameter portion projecting towards the opposing surface of the die/punch. 5. A mould for forming the top of deformable tubular plastic containers comprising a tubular body (51) and a headpiece (52) of plastic material bonded to one end of the tubular body (51), the mould comprising: a punch (10) having an outer surface (11') arranged to engage the container tubular body (51) as an exact fit and an end portion (13) projecting axially from tie lower end of the cylindrical outer surface 8 (11') and a die (30) arranged to form, in combination with the lower surface (13') of the punch, a cavity (F) for forming the headpiece (52) of the container, said die (30) having a concave surface (32') arranged to receive as an exact fit, by axial penetration, the lower of the cylindrical outer surface (11') of the punch together with the lower end of the tubular body (51) of the container, the headpiece (52) being formed within the forming cavity (F) and being pressure-bonded therein to the lower end of the tubular body (51), the punch (10)/die (30) comprising a radial deformation means (22, 20 62, 65), positioned on its outer surface (11')/concave surface (32') which extends annularly along the entire circumference of this surface to act on the tubular body (51) of the container, and is arranged to assume a normal position in which its outer surface does not project radially from the cylindrical outer surface (11') of the punch/from the concave surface (32') of the die (30), and an active position in which it is urged in a radial direction in such a manner as to press the tubular body (51) against the opposing surface of the die/punch, characterised in that said radial deformation means are positioned within an annular chamber (21, 61) which is provided in the punch (10)/die (30), is open towards the cylindrical outer surface (11') of the punch/the concave inner surface (32') of the die, and is in the form of a flexible annular element (22, 62) positioned to close the annular chamber (21, 61) but with its outer surface not normally projecting from the annular chamber (21, 61), said annular element (22, 62) being arranged to deform radially until it presses the tubular body (51) against the opposing surface (32') of the die (30)/against the opposing surface (11') of the punch, as the result of feeding pressurised fluid into the chamber (21, 61); said flexible annular element (22, 62) is in the form of a sleeve or elastomeric material, the section through which is relatively narrow and elongate in a longitudinal direction; and with said flexible annular element (22) there is associated a second metal sleeve (24) elastically flexible in radial direction, and interposed between the tubular body (51) and the sleeve of elastomeric material (22). 6. A mould as claimed in claim 1, characterised in that said radial deformation means comprises a normally undulated annular element (25) of elastically flexible material, the axial section through which extends in a radial direction, and a radial annular chamber (26) provided within the punch (10) and opening into the cylindrical outer surface (11') thereof, it being of variable axial dimension and being arranged to contain said annular element (25) in such a manner that the outer peripheral edge of this latter does not normally project outwards from the annular chamber (26), said annular chamber (26) being able to decrease its axial dimension during the forming of the headpiece (52) to such an extent as to cause compression of the annular element (25), with its consequent radial expansion such that it presses the tubular body (51) against the cylindrical concave surface (32) of the die. 7. A mould as claimed in claim 6, characterised in that the punch (10) comprises two parts movable relative to each other in an axial direction, a first part (12a) rigid with the end portion (13) and having an upwardly facing radial surface (42), and a second part (11a) which presents said cylindrical outer surface (11') and has a downwardly facing radial surface (41), said radial surfaces (41, 42) facing each other and defining the lower and respectively upper surface of said radial annular chamber (26). 8. A mould as claimed in claim 1, characterised in that said radial deformation means comprises an annular element (65), contractable in a radial direction, and a radial annular chamber (66) provided within the die (30) and opening into its concave surface (32) to contain said annular element (65) in such a manner that the inner peripheral edge of this latter does not normally project outwards from the annular chamber (66), said contractable element (65) being made to contract in a radial direction as a result of the mutual axial approach of the entering punch (10) and the cavity of the die (30), in such a manner as to press the tubular body (51) against the opposing surface of the punch. 9. A mould as claimed in claim 8, characterised in that: said annular chamber (66) is provided within the die (30) and possesses a surface (66') inclined downwards towards the punch (10), said deformable element (65) possesses an inclined outer surface (65') which mates with the inclined surface of the chamber (66), and the punch comprises abutment means (72) movable rigidly with it, to move the deformable element (65) downwards along the inclined surface (66') of the chamber (66) following mutual axial approach of the entering punch (10) and the cavity of the die (30), to cause radial contraction of the element (65) towards the opposing surface of the punch (10).
※ AI-Helper는 부적절한 답변을 할 수 있습니다.