公开(公告)号：EP0524181B1

公开(公告)日：1995-12-06

申请号：EP91904363.8

申请日：1991-02-06

申请人： Melea Limited

发明人： HENDRY, James, W.

IPC分类号： B29C45/17

CPC分类号： B29C45/1705 ,  B29C2045/1718 ,  Y10S425/812

摘要： A method and apparatus for injection molding plastic articles with gas-assistance wherein the injected molten plastic (18) is depressurized by a controlled amount prior to gas injection to facilitate the penetration of the gas into the molten plastic (18) within the article-defining cavity (44) of the mold.

公开(公告)号：EP0462969B1

公开(公告)日：1994-02-09

申请号：EP89911655.2

申请日：1989-05-10

申请人： Melea Limited

发明人： KAUER, Hubert

IPC分类号： B29C45/17

CPC分类号： B29C45/1704 ,  B29C2045/1729 ,  Y10S425/812

摘要： A method and apparatus of making a hollow-shaped body from molten resin including cutting a hole through the resin after it has cooled and into a fluid aperture formed during a fluid injection step which distributes resin over the interior mold surfaces. The fluid aperture is in communication with the interior of the hollow-shaped body and is preferably located in the runner or sprue of the mold. A cutting member (72) is located in the mold and has a surface (76) which at least partially defines a resin flow path. Cutting is accomplished by moving the cutting member (72) in a controlled fashion between a molding position and a relieving position to cut the hole. The cutting member (72) includes a fluid-relieving aperture (86). The fluid-relieving aperture (86) is in communication with the fluid aperture in the relieving position (84) of the cutting member (72) to relieve pressure through the fluid-relieving aperture (86).

公开(公告)号：EP0298635A2

公开(公告)日：1989-01-11

申请号：EP88305789.5

申请日：1988-06-22

申请人： Melea Limited

发明人： Hendry, James W.

IPC分类号： F17B1/00 ,  F17B1/013 ,  B29C45/17

CPC分类号： B29C45/1732 ,  F17B1/00 ,  F17B1/013

摘要： A pressurized fluid reservoir having a variable working volume includes a cylinder body having a fixed storage volume and a first inlet and exhaust structure for allowing a compressible fluid to enter and leave the cylinder. A second inlet and exhaust structure is also provided for allowing a substantially incompressible fluid to enter and leave the cylinder. A first charge mechanism pumps the compressible fluid into the cylinder. A second charge mechanism pumps the substantially incompressible fluid into the cylinder to reduce the cylinder fixed storage volume to a desired working volume into which the compressible fluid can be pumped by the first charge mechanism.

摘要翻译： 具有可变工作体积的加压流体储存器包括具有固定存储容积的缸体和用于允许可压缩流体进入和离开缸的第一入口和排气结构。 还提供了第二入口和排气结构，用于允许基本不可压缩的流体进入和离开气缸。 第一充电机构将可压缩流体泵送到气缸中。 第二充电机构将基本上不可压缩的流体泵送到气缸中，以将气缸固定存储容积减小到期望的工作容积，可压缩流体可以由第一充电机构泵送到该工作容积中。

公开(公告)号：EP0584080B2

公开(公告)日：2004-07-14

申请号：EP92905872.5

申请日：1992-01-22

申请人： Melea Limited

发明人： HENDRY, James, W.

IPC分类号： B29C45/00 ,  B29D22/00

CPC分类号： B29C45/1734 ,  B29C45/1732

摘要： A method and system for the injection molding of plastic articles in an injection molding system including a chamber (18) in a mold of the system which stores a charge of pressurized gas immediately prior to use. The mold has an injection aperture and a mold cavity for receiving molten resin. A resin flow path (14) fluidly communicates the injection aperture and the mold cavity within the mold. An orifice (20) in the mold opens the chamber (18) to the mold. A gas receiver (10) initially stores the charge of pressurized gas and a fluid circuit selectively introduces the charge of pressurized fluid into the chamber (18). A valve mechanism (24) in the chamber (18) selectively fluidly communicates the chamber (18) to the flow path (14) under control of a controller (28). When communicated to the flow path (14), the charge of gas distributes the molten plastic within the mold cavity in one embodiment of the invention.

公开(公告)号：EP0734547B9

公开(公告)日：2003-08-20

申请号：EP95904864.6

申请日：1994-12-12

申请人： Melea Limited

发明人： MYLES, Colin, K.

IPC分类号： G05B11/50 ,  G05D16/20

CPC分类号： G05D16/2093 ,  G05D16/2053 ,  Y10T137/0396 ,  Y10T137/2544 ,  Y10T137/87201 ,  Y10T137/87209

摘要： A method and system are provided for controlling a pressurized fluid such as nitrogen gas which may be initially stored at a pressure as high as 20,000 psi. A valve assembly is utilized in the method and system and includes an electric proportioning device such as a pneumatic servovalve (14) and a pair of pneumatic, fluidly-coupled valves (16 and 18) which are piloted by the servovalve (14) to regulate the pressure of the pressurized nitrogen gas. In the method and system, the servovalve (14) operates in a closed loop fashion by utilizing feedback from a feedback device such as a pressure transducer (40). A controller (46) in the closed loop is responsive to a pressure signal from the pressure transducer (40) and a preset reference signal to provide an error control signal to the servovalve (14).

公开(公告)号：EP0584080B1

公开(公告)日：1998-03-25

申请号：EP92905872.5

申请日：1992-01-22

申请人： Melea Limited

发明人： HENDRY, James, W.

IPC分类号： B29C45/00 ,  B29D22/00

CPC分类号： B29C45/1734 ,  B29C45/1732

摘要： A method and system for the injection molding of plastic articles in an injection molding system including a chamber (18) in a mold of the system which stores a charge of pressurized gas immediately prior to use. The mold has an injection aperture and a mold cavity for receiving molten resin. A resin flow path (14) fluidly communicates the injection aperture and the mold cavity within the mold. An orifice (20) in the mold opens the chamber (18) to the mold. A gas receiver (10) initially stores the charge of pressurized gas and a fluid circuit selectively introduces the charge of pressurized fluid into the chamber (18). A valve mechanism (24) in the chamber (18) selectively fluidly communicates the chamber (18) to the flow path (14) under control of a controller (28). When communicated to the flow path (14), the charge of gas distributes the molten plastic within the mold cavity in one embodiment of the invention.

公开(公告)号：EP0625089B1

公开(公告)日：1997-04-16

申请号：EP93901277.9

申请日：1992-12-15

申请人： Melea Limited

发明人： Hendry, James W.

IPC分类号： B29C45/03 ,  B29C45/18 ,  B29C45/00

CPC分类号： B29C33/0055 ,  B29C45/1711 ,  B29C2045/1729 ,  B29C2045/173

摘要： A process and apparatus for injection molding and a plastic article having a hollow rib portion (72) is formed utilizing a spill cavity (73). The process includes the steps of sequentially injecting fluent plastic and gas into a mold cavity having a space defining at least one wall portion of the article and a channel (66) defining a rib portion (72) of the article. A quantity of fluent plastic is initially injected to substantially fill the mold cavity. A charge of pressurized gas is then injected into the channel (66) of the mold cavity to displace a portion of the still fluent plastic into the spill cavity (73) which is flow coupled to the channel (66). Preferably, the thickness of the rib portion (72) in cross section is at least twice as large as the thickness of the wall portion in cross section along the entire length of the rib portion (72). Also, preferably, the channel (66) is tapered along its length. The rib portion may be either internal or external to the article.

公开(公告)号：EP0309182B1

公开(公告)日：1994-07-06

申请号：EP88308671.2

申请日：1988-09-19

申请人： Melea Limited

发明人： Hendry, James W.

IPC分类号： B29C45/17

CPC分类号： B29C45/1735 ,  B29C45/1704 ,  B29C45/1732 ,  Y10S425/812

公开(公告)号：EP0321117B2

公开(公告)日：2005-07-13

申请号：EP88311260.9

申请日：1988-11-28

申请人： Melea Limited

发明人： Loren, Norman S.

IPC分类号： B29C45/17

CPC分类号： B29C45/1704

公开(公告)号：EP0734547B1

公开(公告)日：2001-03-28

申请号：EP95904864.6

申请日：1994-12-12

申请人： Melea Limited

发明人： MYLES, Colin, K.

IPC分类号： G05B11/50 ,  G05D16/20

CPC分类号： G05D16/2093 ,  G05D16/2053 ,  Y10T137/0396 ,  Y10T137/2544 ,  Y10T137/87201 ,  Y10T137/87209

摘要： A method and system are provided for controlling a pressurized fluid such as nitrogen gas which may be initially stored at a pressure as high as 20,000 psi. A valve assembly is utilized in the method and system and includes an electric proportioning device such as a pneumatic servovalve (14) and a pair of pneumatic, fluidly-coupled valves (16 and 18) which are piloted by the servovalve (14) to regulate the pressure of the pressurized nitrogen gas. In the method and system, the servovalve (14) operates in a closed loop fashion by utilizing feedback from a feedback device such as a pressure transducer (40). A controller (46) in the closed loop is responsive to a pressure signal from the pressure transducer (40) and a preset reference signal to provide an error control signal to the servovalve (14).