IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0504997
(2009-07-17)
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등록번호 |
US-8142177
(2012-03-27)
|
우선권정보 |
FR-08 54899 (2008-07-18) |
발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
▼
Installation (1) for blow molding hollow bodies, comprising at least one mold carrier (2) to which a removable mold (3) can be connected via fluid connection means (4), at least one pressurized temperature-controlled fluid circuit (5) passing through the carrier and mold, and automatic circuit (5) s
Installation (1) for blow molding hollow bodies, comprising at least one mold carrier (2) to which a removable mold (3) can be connected via fluid connection means (4), at least one pressurized temperature-controlled fluid circuit (5) passing through the carrier and mold, and automatic circuit (5) shutoff means provided in the carrier (2); which circuit (5) has a fluid connection to at least one chamber (8) having a variable volume that depends on an external pressure applied to said chamber (8) by means (9) for generating an auxiliary fluid at a pressure that is adjustable between the pressure of the temperature-controlled fluid and atmospheric pressure, by means of which the pressure of the pressurized temperature-controlled fluid can be reduced in said chamber (8) by decompression.
대표청구항
▼
1. An installation for blow moulding hollow thermoplastic bodies, comprising at least one mould carrier to which a respective removable mould can be connected via fluid connection means, said installation comprising at least one pressurized temperature-controlled fluid circuit passing through at lea
1. An installation for blow moulding hollow thermoplastic bodies, comprising at least one mould carrier to which a respective removable mould can be connected via fluid connection means, said installation comprising at least one pressurized temperature-controlled fluid circuit passing through at least said carrier and said respective mould, and automatic means for shutting off said circuit being provided in at least said carrier, wherein said installation comprises: at least one enclosure comprising at least one variable-volume chamber provided with a fluid connection to said pressurized temperature-controlled fluid circuit, andgenerating means for generating an adjustably pressurized auxiliary fluid able to vary between a maximum pressure substantially equal to a pressure of a pressurized temperature-controlled fluid present in said circuit and a minimum pressure substantially equal to atmospheric pressure, said generating means being connected to said enclosure outside of said variable-volume chamber in such a way that said variable-volume chamber is subjected to an opposing pressure of said adjustable pressure auxiliary fluid,by which generating means, before said mould is disconnected from said mould respective carrier, said opposing pressure of said auxiliary fluid is reduced from said maximum pressure to substantially said minimum pressure, and said pressure of said pressurized temperature-controlled fluid can be reduced in said variable-volume chamber until said pressure is substantially atmospheric pressure, in such a way as to reduce the risk of pressurized temperature-controlled fluid being sprayed out of said carrier if said mould is disconnected from said mould respective carrier when said means for automatically shutting off said circuit are not working. 2. The installation according to claim 1, wherein said enclosure comprises a movable internal wall separating said enclosure into two chambers of variable respective volumes, said variable-volume chamber being a first chamber having a fluid connection to said pressurized temperature-controlled fluid circuit and a second variable-volume chamber having a fluid connection to said adjustably pressurized auxiliary fluid generating means. 3. The installation according to claim 2, wherein said enclosure is a bladder comprising a deformable internal diaphragm defining said first and second variable-volume chambers. 4. The installation according to claim 2, wherein said enclosure is a substantially rigid enclosure comprising a deformable internal diaphragm defining said first and second variable-volume chambers. 5. The installation according to claim 2, wherein said enclosure is a substantially rigid enclosure comprising a movable internal wall defining said first and second variable-volume chambers. 6. The installation according to claim 5, wherein said enclosure is a cylinder with a piston defining said first and second variable-volume chambers. 7. The installation according to claim 2, wherein said auxiliary fluid generating means operate on an all-or-nothing basis and can selectively either deliver said auxiliary fluid at a pressure substantially equal to that of said temperature-controlled fluid in said temperature-controlled fluid circuit, or connect said second variable-volume chamber to atmosphere. 8. The installation according to claim 7, wherein said auxiliary fluid generating means comprises: a generator of said auxiliary fluid at a pressure substantially equal to that of said temperature-controlled fluid in said temperature-controlled fluid circuit, anda selection valve having an outlet orifice connected to said second variable-volume chamber,a first inlet orifice connected to said auxiliary fluid generatora second inlet orifice connected to atmosphere, anda selector for connecting said outlet orifice to either the first or the second inlet orifice. 9. The installation according to claim 1, wherein said pressurized temperature-controlled fluid circuit comprises: a first main line comprising a first valve, said enclosure being provided with a fluid connection to said first main line between said first valve and a first connection for said fluid connection means of said carrier to a respective mould;a second main line comprising a second valve and connectable to said first main line via said fluid connection means and said mould;a transverse temperature-controlling line connecting said first and second main lines, which temperature-controlling line includes a pressurized fluid temperature controller and means for pumping said pressurized temperature-controlled fluid around said circuit; anda transverse bypass line connecting said first and second main lines, which bypass line includes a third valve which, in closed position, allows said pressurized temperature-controlled fluid to flow through said transverse temperature-controlling line, through said first and second main lines, and through said mould connected to said respective carrier, said first valve on said first main line being positioned between said enclosure and a second connection of said transverse bypass line while said second valve on said second main line is positioned between a third connection for said fluid connection means of said carrier to said respective mould and a fourth connection to said transverse bypass line. 10. The installation according to claim 9, wherein said second main line comprises two manometers positioned one on either side of said second valve connected to said second main line. 11. The installation according to claim 9, wherein a pressure switch is provided on said second main line between said second valve on said second main line and said third connection for said fluid connection means of said carrier to said second main line.
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