公开(公告)号：US5645866A

公开(公告)日：1997-07-08

申请号：US424349

申请日：1995-07-11

申请人： Helmut Eckardt ,  Johann Holzschuh ,  Jurgen Ehritt ,  Michael Renger ,  Rolf Schwesinger

发明人： Helmut Eckardt ,  Johann Holzschuh ,  Jurgen Ehritt ,  Michael Renger ,  Rolf Schwesinger

IPC分类号： B29C45/00 ,  B29C45/17 ,  B29C45/57 ,  B29C45/76 ,  B29C45/77 ,  G05D7/06 ,  G05D16/20 ,  B29C45/16

CPC分类号： B29C45/1732

摘要： It is proposed that a pressure control device and/or pressure regulating device (8) be used for a fluid medium, in particular air or gas, preferably nitrogen, which is to be supplied to an injection mold in addition to the molten plastic, this pressure control device and/or pressure regulating device (8) being provided as a stationary, but preferably as a mobile unit between a pressure generator/pressure accumulator (7) and an injection system associated with the injection mold (3), e.g., in a nozzle head or add-on building block. The device has a main line (21) which leads from the pressure generator/pressure accumulator (7) to the injection system (27) and which is switchable by means of valve control only in such a way that it either lets through or blocks the inflow of media, a first branch line (28) leading to a receiver side of a pressure sensor (29) whose other receiver side is sensitive to the pressure of the medium in the injection mold, and a second branch line (30) which can be switched so as to let through or block flow via a valve control influenced by the pressure sensor (29) and, in so doing, forms a media outflow from the injection mold, in particular a return of media to the pressure generator/pressure accumulator (7). Essential features of this device consist in that the main line (21) branches into at least two parallel flow paths (23a and 23b), that each flow path (23a and 23b) is outfitted with a media inflow control valve (24a and 24b) which may be operated to let through or block flow, as required, that the media inflow control valves (24a and 24b) have different flow cross sections (25a, 25b), and that these media inflow control valves (24a and 24b) can be controlled individually and/or jointly in a stepwise manner depending on the pressure difference determined by the pressure sensor (29).

公开(公告)号：US6019935A

公开(公告)日：2000-02-01

申请号：US416692

申请日：1996-04-19

申请人： Helmut Eckardt ,  Jurgen Ehritt ,  Klaus Lusebrink ,  Michael Renger

发明人： Helmut Eckardt ,  Jurgen Ehritt ,  Klaus Lusebrink ,  Michael Renger

IPC分类号： B29C45/00 ,  B29C45/17 ,  B29C45/26

CPC分类号： B29C45/1704 ,  B29C2045/173

摘要： Proposed is a process for injection molding of products (1) made of thermoplastic material, whose walls (2) enclose a hollow space (3), wherein the molten plastic is injected in a predetermined amount into the cavity or molding nest (6) of a mold (5), during and/or upon which a fluid pressure medium (gas) is applied so that with the formation of the hollow space the molten plastic is distributed along and set against the walls of the cavity or molding nest. The pressure medium (gas) is fed into the cavity or molding nest (6) and into the molten plastic at first essentially only in the direction of flow of the molten plastic and in a quantity and/or at a pressure that causes a void (8) to form within the molten plastic, terminating at a distance from the end of the flow path. Then, with a time lag, more pressure medium (gas) at a higher or increased level of pressure is fed into the cavity and the molten plastic from the end of the flow path for the molten plastic and essentially counter to the direction of flow of the molten plastic, forming a second void (11) which joins with the already existing void (8).

摘要翻译： PCT No.PCT / EP93 / 02694 371日期：1996年04月19日 102（e）日期1996年4月19日PCT提交1993年10月1日PCT公布。 公开号WO94 / 08773 日期1994年4月28日提出了一种注射成型热塑性材料制品（1）的方法，其中壁（2）包围中空空间（3），其中熔融塑料以预定量注入空腔或成型 在模具（5）的嵌套（6）中，在施加流体压力介质（气体）期间和/或在其上施加流体压力介质（气体），使得随着中空空间的形成，熔融塑料沿空腔的壁分布并抵靠空腔壁， 成型巢。 压力介质（气体）首先基本上仅在熔融塑料的流动方向上以一定量和/或在导致空隙的压力（或压力）下被馈送到空腔或模制座（6）中并进入熔融塑料 8）在熔融塑料内形成，在距离流动路径的端部一定距离处终止。 然后，随着时间的推移，在较高或增加的压力水平下的更多的压力介质（气体）从熔融塑料的流动路径的端部被供给到空腔中并且熔融塑料基本上与流动方向相反 形成与已经存在的空隙（8）连接的第二空隙（11）。

公开(公告)号：US5466141A

公开(公告)日：1995-11-14

申请号：US258914

申请日：1994-06-13

申请人： Helmut Eckardt ,  Jurgen Ehritt ,  Michael Renger

发明人： Helmut Eckardt ,  Jurgen Ehritt ,  Michael Renger

IPC分类号： B29C45/00 ,  B29C45/17 ,  B29C45/26 ,  B29C49/06 ,  B29L22/00 ,  B29C45/20

CPC分类号： B29C45/1734 ,  B29C2045/1707 ,  B29C2045/1737 ,  B29C2045/1738

摘要： A device for injection molding articles of plastics material having hollow spaces. The device includes a molding tool with a mold cavity. Plastics material melt is fed to the mold cavity through a nozzle. Another pressurized medium is supplied to the mold cavity through a hollow needle at a location different from the location of the nozzle. A needle core is mounted in the hollow needle. The needle core is axially displaceable within certain limits. The opening of the hollow needle to the mold cavity can be opened and closed or its cross-sectional area can be varied by moving the needle core.

摘要翻译： 一种用于注塑成型具有中空空间的塑料制品的装置。 该装置包括具有模腔的模制工具。 塑料材料熔体通过喷嘴进给模腔。 另一个加压介质通过中空针在不同于喷嘴位置的位置被供应到模腔。 针芯安装在中空针中。 针芯在一定限度内可轴向移动。 可以打开和关闭空心针到模腔的开口，或者可以通过移动针芯来改变其横截面积。

公开(公告)号：US5895667A

公开(公告)日：1999-04-20

申请号：US381798

申请日：1995-02-01

申请人： Helmut Eckardt ,  Jurgen Ehritt ,  Michael Renger

发明人： Helmut Eckardt ,  Jurgen Ehritt ,  Michael Renger

IPC分类号： B29C45/00 ,  B29C45/17 ,  B29C45/26 ,  B29C49/06 ,  B29L22/00 ,  B29C45/16

CPC分类号： B29C45/1734 ,  B29C2045/1707 ,  B29C2045/1737 ,  B29C2045/1738

摘要： A device for injection molding articles of plastics material having hollow spaces. The device includes a molding tool with a mold cavity. Plastics material melt is fed to the mold cavity through a nozzle. Another pressurized medium is supplied to the mold cavity through a hollow needle at a location different from the location of the nozzle. A needle core is mounted in the hollow needle. The needle core is axially displaceable within certain limits. The opening of the hollow needle to the mold cavity can be opened and closed or its cross-sectional area can be varied by moving the needle core.

公开(公告)号：US5106283A

公开(公告)日：1992-04-21

申请号：US571769

申请日：1990-08-22

申请人： Roland Sauer ,  Johann Holzschuh ,  Helmut Echkardt ,  Michael Renger

发明人： Roland Sauer ,  Johann Holzschuh ,  Helmut Echkardt ,  Michael Renger

IPC分类号： B29C45/20 ,  B29C45/17 ,  B29C45/23

CPC分类号： B29C45/1735

摘要： An apparatus for injection molding of plastics material in accordance with a gas or liquid injection method. The apparatus includes a nozzle which can be applied to the injection molding die or the injection mold. This nozzle enables selectively the sole injection of plastics material melt, the simultaneous injection of plastics material melt and medium as well as the sole injection of medium into the mold cavity of the injection molding die or injection mold. The melt is supplied to the nozzle mouth by the extruder screw cylinder of the extruder around a nozzle torpedo, while the medium is introduced into the nozzle so as to be spaced from the nozzle mouth. The automatic operation of the apparatus in the course of all three types of operation is made possible by locating a check valve in the melt supply line of the nozzle between the upstream end of the nozzle torpedo and the junction piece of the extruder screw cylinder, which check valve can be automatically brought into its closed position in direction counter to the extruder screw cylinder.

摘要翻译： 一种根据气体或液体注射方法注塑塑料材料的装置。 该装置包括可以应用于注射模具或注射模具的喷嘴。 该喷嘴能够选择性地单独注射塑料材料熔体，同时注射塑料材料熔体和介质以及将单独的介质注入到注塑模具或注射模具的模腔中。 将熔体通过挤出机的挤出机螺杆筒围绕喷嘴鱼雷供应到喷嘴口，同时将介质引入喷嘴以与喷嘴口间隔开。 通过在喷嘴鱼雷的上游端和挤出机螺杆缸的接合片之间的喷嘴的熔融供给管线中设置止回阀，可以实现在所有三种操作过程中设备的自动操作， 止回阀可以自动进入与挤出机螺杆缸相反的方向的关闭位置。