公开(公告)号：US20030099735A1

公开(公告)日：2003-05-29

申请号：US10167576

申请日：2002-06-13

Applicant: Yudo Co. Ltd

Inventor： Young-Hee Yu

IPC: B29C045/76

CPC classification number: F15B11/123 ,  B29C45/1603 ,  B29C45/281 ,  B29C2045/2841 ,  Y10T29/49826

Abstract: A multi-position control cylinder for hot runners of injection molding machines is disclosed. This multi-position control cylinder has a multi-stage hole formed in a unit body, a first cylinder seated in the lower part of the multi-stage hole, and a first piston set in the first cylinder. In addition, a second cylinder is seated in the multi-stage hole at a position above the first cylinder, with a second piston set in the second cylinder. A valve pin is coupled to the second piston using a valve pin coupling member such that the valve pin extends downward from the second piston while passing through the first piston, with the lower portion of the valve pin inserted into the upper portion of the first piston. An anti-vacuum gap is formed between the first piston and the valve pin coupling member. A cylinder head covers the top of the multi-stage hole at a position above the second piston. This multi-position control cylinder has a simple construction, accomplishes a reliable operation, and easily increases the number of cylinders seated in the multi-stage hole by seating a desired number of additional cylinders with pistons in the multi-stage hole.

Abstract translation: 公开了一种用于注射成型机的热流道的多位置控制筒。 该多位置控制筒具有形成在单元体中的多级孔，位于多级孔的下部的第一缸和设置在第一缸中的第一活塞。 此外，第二气缸在第一气缸上方的位置处放置在多级孔中，第二活塞设置在第二气缸中。 阀销使用阀销联接构件联接到第二活塞，使得阀销从第二活塞向下延伸，同时穿过第一活塞，阀销的下部插入第一活塞的上部 。 在第一活塞和阀销联接构件之间形成防真空间隙。 气缸盖在第二活塞上方的位置处覆盖多级孔的顶部。 该多位置控制气缸具有简单的结构，实现可靠的操作，并且通过将期望数量的具有活塞的附加气缸放置在多级孔中容易地增加了位于多级孔中的气缸的数量。

公开(公告)号：US20030098519A1

公开(公告)日：2003-05-29

申请号：US10167390

申请日：2002-06-13

Applicant: Yudo Co. Ltd.

Inventor： Young-Hee Yu

IPC: B29C045/77

CPC classification number: B29C45/281 ,  F15B11/028 ,  F15B15/1428 ,  F15B15/149 ,  F15B15/204 ,  F15B2211/50536 ,  F15B2211/50554 ,  F15B2211/5153 ,  F15B2211/55 ,  F15B2211/7053 ,  F15B2211/76 ,  F15B2211/86 ,  F15B2211/865

Abstract: A method and device for automatically controlling hydraulic pressure in a hydraulic cylinder for hot runners of pressure regulating injection molding machines is disclosed. This device is provided with a pressure regulating unit, having both a pressure regulating spring and a pressure regulating head, at each of two hydraulic ports formed at the upper and lower portions of the cylinder's sidewall, and makes one of the two units open an associated hydraulic port when a pressure, exceeding a reference level predetermined by both the spring force of the pressure regulating spring and the cross-sectional area of the pressure regulating head, acts on the piston of the cylinder. A predetermined quantity of pressurized oil is discharged from the cylinder through the open port and thereby maintains desired constant pressure acting on the piston in the cylinder. This device has a simple construction, and reduces the number of required solenoid valves of the cylinder from four to two, thus being easily produced at low production cost. The device also automatically regulates the hydraulic pressure inside the cylinder, and forces the actuation oil to continuously flow from the cylinder, thus preventing carbonization of the oil in the cylinder.

Abstract translation: 公开了一种用于自动控制用于压力调节注射成型机的热流道的液压缸中的液压的方法和装置。 该装置设置有压力调节单元，其具有压力调节弹簧和压力调节头，在形成在气缸侧壁的上部和下部的两个液压端口中的每一个处，并且使两个单元中的一个打开相关联的 当超过由压力调节弹簧的弹簧力和压力调节头的横截面面积预定的参考水平的压力作用在气缸的活塞上时，液压口。 预定量的加压油通过开口从气缸排出，从而保持作用在气缸中的活塞上的期望的恒定压力。 该装置结构简单，将汽缸所需电磁阀的数量从4个减少到2个，因此以低的生产成本容易地生产。 该装置还自动调节气缸内的液压，并且迫使致动油从气缸中持续流动，从而防止气缸中油的碳化。

公开(公告)号：US20030098140A1

公开(公告)日：2003-05-29

申请号：US10167575

申请日：2002-06-13

Applicant: Yudo Co. Ltd

Inventor： Young-Hee Yu

IPC: B22D017/12

CPC classification number: B29C45/2725 ,  B23P15/007 ,  B29C45/2738 ,  Y10T29/5317

Abstract: Disclosed herein is a separable manifold of hot runners for metal molds of injection molding machines and a method of manufacturing the manifold. The manifold is designed to be separated into an upper plate and a lower plate while having a flow channel therebetween. The upper plate is assembled with the lower plate into a manifold after inserting a channel pipe covered with copper plates in the flow channel. Thus, the manifold of this invention is easy to manufacture. In addition, it is possible to easily grind the flow channel of the manifold so as to remove angled corners from the flow channel.

Abstract translation: 本文公开了一种用于注射成型机的金属模具的热流道的分离歧管和制造歧管的方法。 歧管被设计成在其间具有流动通道的同时分成上板和下板。 在将通过铜板覆盖的通道管插入流路之后，将上板与下板组装成歧管。 因此，本发明的歧管易于制造。 此外，可以容易地研磨歧管的流路，以便从流动通道去除角部。

公开(公告)号：US20040032060A1

公开(公告)日：2004-02-19

申请号：US10641091

申请日：2003-08-15

Applicant: YUDO CO., LTD.

Inventor： Young-Hee Yu

IPC: B29C045/23

CPC classification number: B29C45/2737 ,  B29C2045/2753 ,  B29C2045/2754

Abstract: A shut-off nozzle for hot runner systems of injection molding machines and a method of controlling the same are disclosed. The shut-off nozzle includes a nozzle body having a resin hole, a heater, and a thermocouple to sense a temperature of the nozzle body; a gate tip having a nozzle gate at which the nozzle body comes into contact with a cavity of a mold; a heating unit provided around the gate tip to heat the gate tip by using electricity; and a cooling unit provided around the gate tip in parallel to the heating unit, so that a coolant passes through the cooling unit to cool the gate tip. In the control method, the nozzle body is primarily heated to a predetermined high temperature by turning on the heater. In addition, the gate tip is heated by turning on the heating unit, prior to injecting a molten resin into a cavity of a mold through the nozzle gate. The heating unit is, thereafter, turned off after an injection of a predetermined amount of the molten resin into the cavity of the mold is completed, thus allowing the gate tip to start to cool. In addition, the cooling unit is operated to quickly cool the gate tip. The mold is opened to remove a molded product from the cavity of the mold.

Abstract translation: 公开了一种用于注射成型机的热流道系统的截止喷嘴及其控制方法。 截止喷嘴包括具有树脂孔的喷嘴体，加热器和用于感测喷嘴体温度的热电偶; 具有喷嘴门的浇口尖端，喷嘴主体与模具的腔体接触; 设置在门尖周围的加热单元，以通过使用电加热门尖; 以及冷却单元，其设置在与所述加热单元平行的所述门尖周围，使得冷却剂通过所述冷却单元以冷却所述浇口尖端。 在控制方法中，通过打开加热器将喷嘴体主要加热到预定的高温。 此外，在通过喷嘴浇口将熔融树脂注入模具的空腔之前，通过打开加热单元来加热浇口尖端。 然后，在将预定量的熔融树脂注入到模具的空腔中之后，加热单元被关闭，从而允许浇口尖端开始冷却。 此外，操作冷却单元以快速冷却门尖。 打开模具以从模具的空腔移除模制产品。