公开(公告)号：US3945784A

公开(公告)日：1976-03-23

申请号：US434641

申请日：1974-01-18

申请人： Thomas Robert Stephen Collins

发明人： Thomas Robert Stephen Collins

IPC分类号： B29C45/16 ,  B29F1/05

CPC分类号： B29C45/1604 ,  Y10S425/225

摘要： A shuttle is mounted in a passage connecting ducts from injection barrels. An outlet in the passage wall connects to a common sprue channel. The shuttle isolates one duct from the opening at each end of its travel but at no time blocks the opening. The shuttle is preferably a ball and is preferably located in the spigot of a shut-off tap.

摘要翻译： 梭子安装在连接注射桶管道的通道中。 通道壁中的出口连接到公共浇口通道。 梭子在其行程的每一端隔离开口处的一个管道，但在任何时候都不会阻塞开口。 梭子优选地是球，并且优选地位于截止水龙头的塞子中。

公开(公告)号：US3871805A

公开(公告)日：1975-03-18

申请号：US35465573

申请日：1973-04-26

申请人： JACOBS ARTHUR W

发明人： JACOBS ARTHUR W

IPC分类号： B29C45/07 ,  B29C45/23 ,  B29C45/50 ,  B29F1/03

CPC分类号： B29C45/07 ,  B29C45/231 ,  B29C45/5008 ,  Y10S425/224 ,  Y10S425/225

摘要： A cylinder head for a reciprocating screw injection molding machine characterized in that it has an integral spreader which transforms a solid cylindrical body of plasticized material into a plurality of streams of progressively decreasing cross-section area which converge to the nozzle orifice, said spreader being hollow and containing a spring which biases a pressure-actuated valve member into engagement with a valve seat around the nozzle orifice located close to the tip of the nozzle whereby, after a short delay following the filling of the mold with plasticized material by stroking of the screw in the injection cylinder, the material freezes in the nozzle orifice so as to constitute a short length and small diameter extension of the mold sprue which is withdrawn from the nozzle orifice when the cylinder and nozzle are retracted away from the mold. The interior of the spreader is communicated with the atmosphere whereby the valve member is automatically opened at desired pressure of the plasticized material acting thereon when the screw is operated as a plunger to inject plastic material into the mold contacted by the nozzle and is automatically closed upon decrease in actuating force on the screw (and resulting decompression of the material in the cylinder) after the mold is filled with plastic material, said valve member remaining in closed position when the nozzle is out of engagement with the mold and during rotation and retraction of the screw.

公开(公告)号：US3861841A

公开(公告)日：1975-01-21

申请号：US26228272

申请日：1972-06-13

申请人： HANNING ROBERT

发明人： HANNING ROBERT

IPC分类号： B29C44/42 ,  B29C45/13 ,  B29F1/00

CPC分类号： B29C45/13 ,  B29C44/421 ,  Y10S425/224 ,  Y10S425/225

摘要： An apparatus for producing particularly large-surface objects by injection-molding in a mold a mixture of plasticized synthetic material and a foaming agent, which comprises the steps of feeding the mixture to a plurality of complete injection-molding units, each including an injection-molding cylinder, an injection molding piston reciprocating in the cylinder and an injectionmolding nozzle. The mixture is injected through all injectionmolding nozzles by means of the individual injection-molding pistons into a mold.

摘要翻译： 一种用于通过在模具中注塑成型塑化合成材料和发泡剂的混合物来生产特别大的表面物体的装置，其包括以下步骤：将混合物进料到多个完整的注射成型单元，每个注射成型单元包括注射成型单元， 成型气缸，在气缸中往复运动的注塑活塞和注射成型喷嘴。 将混合物通过所有注射成型的喷嘴通过各个注塑活塞注入模具中。

公开(公告)号：US4140238A

公开(公告)日：1979-02-20

申请号：US850686

申请日：1977-11-11

申请人： James E. Dawson

发明人： James E. Dawson

IPC分类号： B29C37/00 ,  B29C45/00 ,  B29C45/23 ,  B29F1/03

CPC分类号： B29C45/23 ,  B29C2045/235 ,  Y10S425/225 ,  Y10T137/7781

摘要： A nozzle shut-off valve for injection molding machine for plastic material, especially thermoplastic material, has two pneumatic cylinder-and-plunger units. One such unit has its plunger mounted to reciprocate so as to block the passageway of the plastics through the nozzle. The first such plunger and cylinder unit is provided with a pilot passage in the valve nozzle so that the pressure of molten plastic can be used to open it. The second such unit is much smaller diameter and has its plunger mounted to block the pilot passage so that the second unit in effect becomes a pilot valve and controls the application of fluid pressure through the pilot passage to the first unit plunger or blocking plunger.

摘要翻译： 用于塑料材料，特别是热塑性材料的注射成型机的喷嘴截止阀具有两个气动缸和柱塞单元。 一个这样的单元的柱塞安装成往复运动，以阻挡塑料通过喷嘴的通道。 第一个这样的柱塞和缸单元在阀喷嘴中设置有先导通道，使得可以使用熔融塑料的压力来打开它。 第二个这样的单元直径小得多，并且其柱塞安装成阻挡先导通道，使得第二单元实际上变成先导阀并且控制通过导向通道的流体压力施加到第一单元柱塞或阻塞柱塞。

公开(公告)号：US4073944A

公开(公告)日：1978-02-14

申请号：US702481

申请日：1976-07-06

申请人： James E. Dawson

发明人： James E. Dawson

IPC分类号： B29C37/00 ,  B29C45/00 ,  B29C45/23 ,  B29F1/03

CPC分类号： B29C45/23 ,  B29C2045/235 ,  Y10S425/225 ,  Y10T137/7781

摘要： A nozzle shut-off valve for an injection molding machine has a plunger mounted to reciprocate in a bore so as to block the passageway of the plastic through the nozzle, a single-acting pneumatic piston and cylinder to reciprocate the plunger, to block said passageway, and a pilot passage connecting the underside of the plunger to a location upstream of the intersection of the bore and the passageway for plastic through the nozzle.

摘要翻译： 用于注射成型机的喷嘴截止阀具有安装成在孔中往复运动以便阻挡塑料通过喷嘴的通道的柱塞，单作用气动活塞和气缸使柱塞往复运动，以阻挡所述通道 以及将柱塞的下侧连接到孔和通道的相交处的上游位置以将塑料通过喷嘴的先导通道。

公开(公告)号：US3571856A

公开(公告)日：1971-03-23

申请号：US3571856D

申请日：1969-05-14

申请人： BISCHOFF CHEMICAL CORP

发明人： VOELKER WALTER D

IPC分类号： B29C44/42 ,  B29C45/13 ,  B29C45/46 ,  B23F1/04

CPC分类号： B29C45/13 ,  B29C44/427 ,  B29C45/46 ,  Y10S264/83 ,  Y10S425/225 ,  Y10S425/227

摘要： Giant articles of cellular plastic are molded in injection molding apparatus. Each of a plurality of injection nozzles comprises a bore in which an injection plunger reciprocates between a withdrawn position at which the tip of the injection plunger rests during the brief mold-filling step and an advanced position at which the tip rests during much of the prolonged step of cooling the molded article. As the plunger advances from its withdrawn position, it first acts as a valve to discontinue flow of the plastic into the nozzle bore and then during a principal portion of its advancing stroke, the injection plunger purges the residual cellular plastic between an inlet orifice and the nozzle tip and forces it into the mold. Only in the final stages of the withdrawing stroke does the tip of the injection plunger expose the inlet orifice to open the valve to renew the flow of cellular plastic to the mold. Power means such as a hydraulic cylinder for each injection plunger actuates the reciprocation. The improvement concerns means provided to each injection plunger as soon as it had completed a selected major amount of its withdrawing stroke so that it is temporarily braked at a position near the brink of valve-opening position. Sensors detect and provide signals while an injection plunger is thus braked at a brink of opening position. A simultaneity control system detects the signals and responds as soon as the signals establish that every injection plunger is at such brink of opening position, and then simultaneously releases the brake for each and all of the injection plungers, which then move to the fully withdrawn positions, thereby simultaneously opening all of the valves. More reproducible articles are molded when the plurality of nozzles are reliably opened with improved simultaneity than when the injection plungers withdrawn by the plurality of hydraulic cylinders by a single stage movement.

公开(公告)号：US3271491A

公开(公告)日：1966-09-06

申请号：US16818262

申请日：1962-01-23

申请人： GUNNAR MIKKELBORG

发明人： GUNNAR MIKKELBORG

IPC分类号： B29C45/20 ,  B29C67/24

CPC分类号： B29C45/20 ,  B29C67/241 ,  Y10S425/225

公开(公告)号：US3164863A

公开(公告)日：1965-01-12

申请号：US34751564

申请日：1964-02-26

申请人： ROBERT HUNT JAMES

发明人： ROBERT HUNT JAMES

IPC分类号： B29C45/20 ,  B29C45/46

CPC分类号： B29C45/461 ,  B29C45/20 ,  B29C45/46 ,  Y10S425/019 ,  Y10S425/225

公开(公告)号：US3841813A

公开(公告)日：1974-10-15

申请号：US29549272

申请日：1972-10-06

申请人： TEMPCRAFT TOOL & MOLD

发明人： STANCIU V

IPC分类号： B29C45/20 ,  B29C37/00 ,  B29C45/00 ,  B29C45/62 ,  B29C45/77 ,  B29C67/24 ,  B29F1/03

CPC分类号： B29C67/241 ,  B22C7/02 ,  Y10S425/224 ,  Y10S425/225

摘要： A nozzle structure is provided for injecting hot wax into a die or mold. The nozzle structure comprises a generally tubular housing, an intermediate portion of which is submerged in a storage reservoir of hot wax with the discharge end of the housing extending beyond the reservoir. The hot wax in the storage reservoir is under pressure and when the nozzle plug is in open position, the hot wax flows directly from the reservoir through the valve in the nozzle plug to fill the die or mold. At the end of the injection operation, the valve plug is moved toward closed position and the present invention facilitates a rapid closing of such valve plug by providing a pressure relief reservoir mounted adjacent the outlet end of the housing and communicating through the housing adjacent the discharge or outlet end thereof in position to receive hot wax propelled by the valve plug near the end of its closing movement.

摘要翻译： 提供喷嘴结构用于将热蜡喷射到模具或模具中。 喷嘴结构包括大致管状的壳体，其中间部分浸没在热蜡的储存容器中，壳体的排放端延伸超过储存器。 存储容器中的热蜡处于压力下，当喷嘴塞处于打开位置时，热蜡直接从储存器流过喷嘴塞中的阀，以填充模具或模具。 在注射操作结束时，阀塞移动到关闭位置，并且本发明通过提供安装在壳体的出口端附近的压力释放储存器并且通过邻近排出口的壳体而连接，从而有助于快速关闭这种阀塞 或其出口端在接近其关闭运动结束时接收由阀塞推动的热蜡。

公开(公告)号：US3371384A

公开(公告)日：1968-03-05

申请号：US45379865

申请日：1965-05-06

申请人： LENSLITE CO INC

发明人： ROBERT NOUEL

IPC分类号： B29C45/23

CPC分类号： B29C45/23 ,  Y10S425/225