公开(公告)号：EP0321160A2

公开(公告)日：1989-06-21

申请号：EP88311706.1

申请日：1988-12-09

申请人： Melea Limited

发明人： Loren, Norman S.

IPC分类号： B29C45/17 ,  B29C45/23 ,  B29C45/28 ,  B29C67/22

CPC分类号： B29C44/105 ,  B29C45/1735 ,  B29C45/2806

摘要： An injection molding method and nozzle for use therein wherein first and second variable pressures are applied to a piston of a valve mechanism of the nozzle so that a differential fluid pressure on the piston causes a tip portion of the valve mechanism to alternately open and close. In this way, the tip portion communicates the flow of resin from a nozzle body of the nozzle to an injection aperture of a mold. Differential pressure on the piston prevents a fluid which distributes the molten resin over the interior surfaces of the mold from entering the flow path of the molten resin in the nozzle body. The fluid preferably is a gas, such as nitrogen. Preferably, the piston is mounted for reciprocating movement within the nozzle body and the first pressure is provided by the resin during resin injection and the second pressure is partially applied by the nitrogen gas. Preferably, the valve mechanism includes a counterbalance mechanism which is set to prevent fluid entry into the mold until the tip portion of the valve mechanism is closed. The resulting article is then cooled to a temperature below the softening point of the resin, the pressure is relieved within the article and the mold is opened to remove the article. The nozzle may also be utilized in making structural foam articles from a foamable resin. The pressure within the mold is relieved to permit foaming by the foamable resin after injection of the foamable resin.

摘要翻译： 一种注射成型方法和用于其中的喷嘴，其中第一和第二可变压力施加到喷嘴的阀机构的活塞，使得活塞上的差动流体压力使得阀机构的尖端部分交替地打开和关闭。 以这种方式，尖端部分将树脂从喷嘴的喷嘴体流到模具的喷射孔。 活塞上的差压防止了将熔融树脂分布在模具的内表面上的流体进入喷嘴体内的熔融树脂的流动路径。 流体优选为气体，例如氮气。 优选地，活塞被安装用于在喷嘴体内往复运动，并且在树脂注射期间由树脂提供第一压力，并且第二压力被氮气部分地施加。 优选地，阀机构包括平衡机构，其被设置为防止流体进入模具直到阀机构的末端部分闭合。 然后将所得制品冷却至低于树脂软化点的温度，在制品内释放压力，打开模具以除去制品。 喷嘴也可用于从可发泡树脂制造结构泡沫制品。 在注射可发泡树脂之后，模具内的压力被释放以允许发泡树脂发泡。

公开(公告)号：EP0298631A2

公开(公告)日：1989-01-11

申请号：EP88305734.1

申请日：1988-06-23

申请人： Melea Limited

发明人： Hendry, James W.

IPC分类号： B29C45/23 ,  B29C45/17

CPC分类号： B29C45/1732 ,  B29C45/1735 ,  B29C45/231 ,  B29C2045/1707

摘要： A nozzle for the injection molding of thermoplastic materials includes a nozzle body having a first bore for establishing a flow path for a molten thermoplastic. A first end of the nozzle body is adapted for fluid connection with a sprue of an associated mold body, and a second end thereof is adapted for fluid connection with an end of an associated injection molding machine. The nozzle body also includes a second bore. A first valve assembly, which is adapted for reciprocating movement in the nozzle body second bore, is provided to control the flow of plastic through the nozzle body. The first valve member includes a body having a tip portion and a fluid passage formed in the body and open at one end through the tip portion. A connection member is provided for communicating the valve body fluid passage with an associated source of pressurized fluid. An actuator member is provided for selectively actuating the first valve member to a closed position thereby preventing the flow of plastic through the nozzle body. A second valve assembly is provided for preventing the flow of plastic through the valve body fluid passage and for regulating the flow of pressurized fluid in both directions through the valve body fluid passage.

摘要翻译： 用于注塑热塑性材料的喷嘴包括具有用于建立熔融热塑性塑料流道的第一孔的喷嘴体。 喷嘴主体的第一端适于与相关联的模具主体的浇道流体连接，并且其第二端适于与相关联的注塑机的端部流体连接。 喷嘴体还包括第二孔。 提供适于在喷嘴体第二孔中往复运动的第一阀组件，以控制塑料通过喷嘴体的流动。 第一阀构件包括具有尖端部分和形成在主体中的流体通道的主体，并且其一端在顶端部分开口。 提供连接构件用于使阀体流体通道与相关联的加压流体源连通。 提供致动器构件用于选择性地将第一阀构件致动到关闭位置，从而防止塑料通过喷嘴体。 提供第二阀组件，用于防止塑料流过阀体流体通道并用于通过阀体流体通道调节加压流体在两个方向上的流动。

公开(公告)号：EP0234522A3

公开(公告)日：1988-12-21

申请号：EP87102431

申请日：1987-02-20

申请人： BATTENFELD GMBH

发明人： CYRIAX, WILHELM

IPC分类号： B29C45/23 ,  B29C45/16 ,  B29C45/20

CPC分类号： B29C45/1606

公开(公告)号：EP0113222A2

公开(公告)日：1984-07-11

申请号：EP83307709.2

申请日：1983-12-19

申请人： FORD MOTOR COMPANY LIMITED ,  FORD-WERKE AKTIENGESELLSCHAFT ,  FORD FRANCE SOCIETE ANONYME

发明人： Modur, Bhaskar ,  Perl, Uwe Werner

IPC分类号： B29C45/23 ,  B29C45/24 ,  B29B7/76 ,  B29C45/14

CPC分类号： B29C37/0028 ,  B29C45/1753 ,  B29C45/231

摘要： @ Injection apparatus suitable for supplying in-mold thermoset coating material into a compression molding tool is provided, which injection apparatus comprises a housing (10) the forward end of which comprises an outlet nozzle (11) and an outlet channel (12) extending through the outlet nozzle, the forward terminus of the outlet channel being an outlet port (13). First and second material supply channels (14 and 15) extend within the housing from first and second supply inlet ports (16 and 17) in the housing, respectively, to a single common junction with the outlet channel. A shut-off rod (26) is slideably disposed within the outlet channel, being adapted to provide a sealing closure of the outlet port in a first, forward position and being retractable from the forward position to a second position in the outlet channel rearward of the junction of the material supply channels with the outlet channel. In both the forward and retracted position, the shut-off rod forms a sealing engagement with the outlet channel rearward of the junction of the two material supply channels with the outlet channel. Significantly, the first and second material supply channels are in communication with each outer via only a single flow-path, at least when the shut-off rod is in the forward position.

公开(公告)号：EP4338924A1

公开(公告)日：2024-03-20

申请号：EP23193999.2

申请日：2023-08-29

申请人： The Japan Steel Works, Ltd.

发明人： Nakayama, Kiyotaka

IPC分类号： B29C45/23 ,  B29C45/20

摘要： A shut-off nozzle includes a nozzle body portion having an in-nozzle flow path formed therein, and a needle valve that is inserted into the nozzle body portion coaxially with the nozzle body portion and is configured to open and close an outlet of the in-nozzle flow path. A cylindrical portion is formed in the vicinity of a tip portion of the needle valve. A cylindrical hole portion is formed in the vicinity of a tip portion of the in-nozzle flow path, the cylindrical hole portion being a cylindrical hole. The cylindrical portion is configured to be fitted into the cylindrical hole portion in a case where the needle valve is driven in a forward direction.

公开(公告)号：EP4034787A1

公开(公告)日：2022-08-03

申请号：EP20868942.2

申请日：2020-09-16

申请人： INCOE CORPORATION

发明人： GREB, Scott ,  SREDZINSKI, Ryan ,  JOERG, Anton

IPC分类号： F16K31/528 ,  F16K31/58 ,  F16K31/122 ,  B29C45/28 ,  B29C45/23

公开(公告)号：EP3242784A1

公开(公告)日：2017-11-15

申请号：EP15860305.0

申请日：2015-11-16

申请人： Husky Injection Molding Systems Luxembourg IP Development S.à.r.l

发明人： JENKO, Edward Joseph

IPC分类号： B29C45/23

摘要： A method and apparatus for equalizing gate pressure of a hot runner nozzle are disclosed. The nozzle includes a nozzle housing defining a primary melt channel, a first nozzle tip having a first secondary melt channel in fluid communication with the primary melt channel, a second nozzle tip having a second secondary melt channel in fluid communication with the primary melt channel, and a valve disposed in the primary melt channel for selectively opening and closing a downstream end of the primary melt channel to control a flow of melt to the first and second secondary melt channels. In some embodiments, the valve is configured to selectively open when a pressure of the melt reaches a threshold peak pressure. In some embodiments, the valve includes a valve stem that cooperates with the primary melt channel to block a flow of melt therefrom until the threshold peak pressure is established.

公开(公告)号：EP3006182A1

公开(公告)日：2016-04-13

申请号：EP15003293.6

申请日：2008-08-22

申请人： Mold-Masters (2007) Limited

发明人： Kudchadkar, Vijay ,  Fairy, Fabrice

IPC分类号： B29C45/23 ,  B29C45/18 ,  B29C45/27 ,  B29C45/30

CPC分类号： B29C45/30 ,  B29C45/2806 ,  B29C2045/2889

摘要： A hot runner installable to a hot half of an injection molding apparatus. The hot runner comprising a manifold, a nozzle having a nozzle body and a nozzle channel running therethrough, and a valve pin bushing disposed in a bore in the nozzle body. The valve pin bushing including a body, a projecting portion and a bore extending therethrough to accommodate a valve pin, wherein the projecting portion extends to the nozzle channel to define an annular section of the nozzle channel. The upstream side of the projecting portion includes a flow restricer disposed in the annular section, wherein the downstream side of the reflecting portion includes a narrow portion. The flow restricter is separated from the nozzle channel by a gap that defines a restricted region and the narrow portion defines an unrestricted region of the annular section.

摘要翻译： 一个热流道，可以安装在注射成型设备的热半部分。 热流道包括歧管，具有喷嘴主体的喷嘴和从其流过的喷嘴通道，以及设置在喷嘴体中的孔中的阀销衬套。 阀销衬套包括主体，突出部分和延伸穿过其中以容纳阀销的孔，其中突出部分延伸到喷嘴通道以限定喷嘴通道的环形部分。 突出部分的上游侧包括设置在环形部分中的流动限制器，其中反射部分的下游侧包括狭窄部分。 流动限制器通过限定区域的间隙与喷嘴通道分开，狭窄部分限定环形部分的不受限制的区域。

公开(公告)号：EP2398631A4

公开(公告)日：2015-01-21

申请号：EP10733159

申请日：2010-01-21

申请人： MOLD MASTERS 2007 LTD

发明人： BABIN DENIS ,  GODWIN HAROLD EMERSON ,  QIAN JIPING ,  LAI YAT KWONG

IPC分类号： B29C45/22 ,  B29C45/17 ,  B29C45/23 ,  B29C45/27 ,  B29C45/28 ,  B29C45/74 ,  B29C67/24

CPC分类号： B29C45/27 ,  B29C45/2725 ,  B29C45/2737 ,  B29C45/2756 ,  B29C45/2806 ,  B29C45/281 ,  B29C67/246 ,  B29C2045/2719 ,  B29K2083/005

公开(公告)号：EP2781331A1

公开(公告)日：2014-09-24

申请号：EP14002072.8

申请日：2008-08-22

申请人： Mold-Masters (2007) Limited

发明人： Kudchadkar, Vijay

IPC分类号： B29C45/23 ,  B29C45/18 ,  B29C45/30

CPC分类号： B29C45/30 ,  B29C45/2806 ,  B29C2045/2889

摘要： The invention refers to a valve pin bushing for use in an injection molding system. The valve pin bushing includes a body portion, a projecting portion that extends from the body portion and a bore extending through the body portion and the projecting portion to accommodate a valve pin.
The projecting portion having an inlet opening in an upstream side thereof and an outlet opening in a downstream end thereof. In combination with the valve pin, the projecting portion defines an annular section of a melt flow channel. An upstream side of the projecting portion includes a flow restrictor disposed in the annular section of the flow channel, wherein the flow restrictor partially defines an outside boundary of the annular section.

摘要翻译： 本发明涉及一种用于注射成型系统的阀芯衬套。 阀销衬套包括主体部分，从主体部分延伸的突出部分和延伸穿过主体部分的孔和突出部分以容纳阀销。 突出部分在其上游侧具有入口，在其下游端具有出口。 与阀销组合，突出部分限定了熔体流动通道的环形部分。 突出部分的上游侧包括设置在流动通道的环形部分中的限流器，其中限流器部分地限定环形部分的外部边界。