公开(公告)号：US5354523A

公开(公告)日：1994-10-11

申请号：US922683

申请日：1992-07-29

Applicant: Chandrakant C. Shah

Inventor： Chandrakant C. Shah

IPC: B29C45/17 ,  B29C35/16 ,  B29C45/72 ,  B29C45/78

CPC classification number: B29C45/1706 ,  B29C2045/1707 ,  B29C2045/171

Abstract: A process for injection molding of thermoplastic materials which includes a nozzle body having a bore to provide a flow path for molten thermoplastic. One end of the nozzle body is adapted for connection with a sprue of an associated mold body, and the other is adapted for connection with an end of an associated injection molding machine. The nozzle body has a shut-off valve fluid pin housing adapted for reciprocating movement in the nozzle bore to control the flow of plastic through the nozzle body. The shut-off valve fluid pin housing also includes a body having an adjustable fluid pin with a tip portion and a fluid passage formed in the body and open at the tip portion and the other end of the fluid passage communicating with a source of two pressurized fluids, one in vapor and liquid phase and another in gas. The shut-off valve is actuated to allow thermoplastic material to flow and subsequently a first pressurized fluid vapor is allowed to flow to form a hollow cavity in the thermoplastic material and then terminated and a second fluid which is a gas is allowed to flow into the cavity followed by the liquid of the first fluid. The fluid flow is controlled by the fluid pin shape and stroke adjustments. After the thermoplastic material has set, the pressurized fluid is vented through the fluid pin housing passage into a fluid condenser for recovery of the vapor and liquid and then into atmosphere.

Abstract translation: 一种用于注塑热塑性材料的方法，其包括具有孔的喷嘴体，以提供用于熔融热塑性塑料的流路。 喷嘴主体的一端适于与相关联的模具主体的浇口连接，另一端适于与相关联的注模机的端部连接。 喷嘴体具有适于在喷嘴孔中往复运动的截止阀流体销壳，以控制塑料通过喷嘴体的流动。 截止阀流体销壳体还包括具有可调节流体销的主体，其具有尖端部分和形成在主体中的流体通道，并且在流体通道的末端部分和另一端处开放，该流体通道与两个加压 流体，一个在蒸气和液相，另一个在气体中。 关闭阀被致动以允许热塑性材料流动，随后允许第一加压流体蒸汽流动以在热塑性材料中形成中空腔，然后终止，并且允许作为气体的第二流体流入 空腔后面是第一流体的液体。 流体流动由流体销的形状和行程调节来控制。 在热塑性材料固化之后，加压流体通过流体销壳体通道被排放到流体冷凝器中，用于回收蒸汽和液体，然后进入大气。

公开(公告)号：US5208046A

公开(公告)日：1993-05-04

申请号：US755672

申请日：1991-09-06

Applicant: Chandrakant C. Shah ,  Verman Survjeet

Inventor： Chandrakant C. Shah ,  Verman Survjeet

IPC: B29C45/17 ,  B29C45/23

CPC classification number: B29C45/231 ,  B29C45/1735 ,  B29C2045/1707

Abstract: A nozzle for injection molding of thermoplastic viscous fluid materials which includes a nozzle body having a bore to provide a flow path. One end of the nozzle body is adapted for viscous fluid connection with a sprue of an associated mold body, and the other end is adapted for viscous fluid connection with an end of an associated injection molding machine. The nozzle body includes within its bore, a shut-off valve non-viscous fluid pin housing assembly which is adapted for reciprocating movement in the nozzle body. The fluid pin housing has a tip portion and a non-viscous fluid passage formed in the housing and open at the tip portion and the other end of the non-viscous fluid passage communicating with an associated source of pressurized non-viscous fluid. An actuator is provided for reciprocating within the nozzle body of the shut-off valve fluid pin housing to an open or closed position controlling the flow of viscous plastic through the nozzle body. The fluid pin housing tip portion located in the non-viscous passage of the fluid pin housing having a fixed or adjustable non-viscous fluid pin. The shaping of the fluid pin tip in the non-viscous fluid passage outlet provides different fluid flow during discharge and later exhaust of non-viscous fluid.

Abstract translation: 一种用于注塑热塑性粘性流体材料的喷嘴，其包括具有用于提供流路的孔的喷嘴体。 喷嘴体的一端适于与相关联的模具主体的浇口粘性流体连接，另一端适于与相关联的注射成型机的端部粘性流体连接。 喷嘴主体包括在其孔内，适于在喷嘴体中往复运动的截止阀非粘性流体销壳体组件。 流体销壳体具有形成在壳体中的顶端部分和非粘性流体通道，并且在非粘性流体通道的顶端部分开口，而另一端与相关联的加压非粘性流体源连通。 致动器被提供用于在截止阀流体销壳体的喷嘴体内往复运动到打开或关闭位置，从而控制粘性塑料通过喷嘴体的流动。 位于流体销壳体的非粘性通道中的流体销壳体顶端部分具有固定或可调节的非粘性流体销。 流体针尖在非粘性流体通道出口中的成形在排出期间提供不同的流体流动并且随后排出非粘性流体。