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公开(公告)号：US3843295A
公开(公告)日：1974-10-22
申请号：US36361873
申请日：1973-05-24
发明人： GREENBERG W , NUSSBAUM F
CPC分类号： B29C45/322 , B29C45/2701 , B29C2045/2717 , B29C2045/2798
摘要： Split molds are mounted upon a plurality of platens having parallel faces reciprocating within the reciprocating linear movement of clamping means in an injection molding machine. Each mold cavity is filled through one or more nozzles extending from a fixed manifold portion of the machine, each nozzle having a tip at least intermittently fitting against a nozzle seat. Length adjustment means are provided for each nozzle, whereby the molding machine is operable at a plurality of temperatures, while still having a reciprocatingly retractable leakproof fit between certain nozzle tips and their nozzle seats.
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公开(公告)号：US3796779A
公开(公告)日：1974-03-12
申请号：US3796779D
申请日：1972-02-02
发明人： GREENBERG W
CPC分类号： B29C44/461 , B29C44/3442 , Y10S264/05 , Y10S264/13 , Y10S264/83
摘要： GAS IS INJECTED INTO A FLOWING STREAM OF MOLTEN PLASTIC TO PROVIDE A MIXTURE CONTAINING AN AMOUNT OF GAS WHICH AT AMBIENT CONDITIONS WOULD CONSTITUTE ABOUT 10% TO ABOUT 98% OF THE VOLUME OF THE MIXTURE. A RELATIVELY THIN, LARGE DIAMETER ANNULAR STREAM OF MOLTEN PLASTIC ADVANCES THROUGH THE MIXING ZONE, THE GAS BEING INJECTED INTO THE MIXTURE THROUGH AT LEAST ONE OF THE GENERALLY CYLINDRICAL WALLS OF THE MIXING ZONE. OF PARTICULAR IMPORTANCE, THE GAS IS INJECTED THROUGH A POROUS WALL HAVING MORE THAN A THOUSAND OPENINGS PPER SQUARE CENTIMETER, SUCH AS AN ULTRA-FINE SINTERED GLASS FIBRE TYPE OF GAS DIFFUSION MEMBER. EACH OF THE WALLS OF THE MIXING ZONE IS DESIRABLY TAPERED, SO THAT THE THICKNESS OF THE MOLTEN CELLULAR PLASTIC EFFUENT IS GREATER THAN THE THICKNESS OF THE ENTERING STREAM. THE MIXTURE ADVANCES THROUGH A LENGTH OF MIXING ZONE WHICH IS FROM ABOUT TEN TO ABOT ONE HUNDRED TIME THE MARGINAL INCREASE IN THICKNESS OF THE STREAM. THE EFFUENT FROM THE MIXING ZONE FLOWS THROUGH A HEATED STABILIZATION ZONE WHICH IS SEVERAL TIMES LONGER THAN THE MIXING ZONE. THE STABILIZED MIXTURE CAN THEN BE RESHAPED FOR FLOWING INTO STREAMS UTILIZING THE MIXTURE OF MOLTEN PLASTIC AND GAS.
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公开(公告)号：US3763293A
公开(公告)日：1973-10-02
申请号：US3763293D
申请日：1972-02-03
发明人： NUSSBAUM F
CPC分类号： B29C44/3419 , B29C33/04 , B29C33/56 , B29C35/007 , B29C44/0407 , B29C2791/008 , B29K2105/04 , Y10S264/83
摘要： PROGRAMMING, AND/OR DIFFERENTIAL PRESSURE PROGRAMMING FOR DIFFERENT ZONES OF THE ARTICLE. VARIOUS SUPPLEMENTAL AND/OR OPTIONAL FEATURES ARE DISCLOSED.
GIANT SIZED PLASTIC ARTICLES ARE MASS PRODUCED WITH AUTOMATION BY LOW PRESSURE INJECTION MOLDING. AN ARTICLE IS DESIGNED TO ACHIEVE THE ULTIMATE ENGINEERING PERFORMANCE OF THE INTERNAL STRUCTURE IN RELATION TO ITS EXTERNAL SHAPE, THUS PROVIDING ZONES IN WHICH THE INTERNAL STRUCTURE IS DIFFERENT FROM OTHER ZONES, ANDSUCH DIFFERENCES ARE IMPARTED BY THE CONTROL OF THE MOLDING PROCESS. THE PROPORTIONS OF GAS AND MOLTEN PLASTIC ARE CAREFULLY CONTROLLED PRIOR TO THE ACCUMULATION OF THE FEED IN A BATCHING DEVICE. A SHOT OF FEED FLOWS THROUGH A DISTRIBUTION SYSTEM INTO A STRUCTURIZER MOLD HAVING CONTOURED WALLS OF LOW SPECIFIC HEAT AND HAVING HEAT TRANSFER MEANS PERMITTING DIFFERENTIAL PROGRAMMING OF THE TEMPERATURE OF DIFFERENT ZONES. BEFORE THE ARTICLE HAS SOLIDIFIED IN THE STRUCTURIZER MOLD, THE DESIRED DIFFERENCES IN INTERNAL STRUCTURE ARE IMPARTED BY REASON OF THE DIFFERENTIAL TEMPERATURE-
4.发明授权Method of making an electroformed mold having heat transfer conduits and foam polyurethane foundation 失效制造具有热转移导体和泡沫聚氨酯基础的电铸模具的方法
公开(公告)号：US3723584A
公开(公告)日：1973-03-27
申请号：US3723584D
申请日：1969-12-15
发明人： NUSSBAUM F
CPC分类号： B29C44/428 , B29C33/04 , B29C33/56 , Y10S425/012 , Y10S425/029
摘要： Molds are produced by providing a master of relatively inexpensive material, preferably wood. The wood is coated with a material which will have the texture and dimensions of the end product to be produced. The coating material must be inert to a plating solution and must be conductive to permit deposition of the plating solution thereon. The master thus produced is electroformed to provide a metallic envelope of copper, nickel, or mixtures thereof thereabout. A box, open at one end, including a rear plate and peripheral frame members is provided for each contoured wall. Wax rods are mounted on the electroformed envelope. The wax rods communicate with the ends of metal tubing. A layer of silicone rubber or similar material is applied over the wax rods and the ends of the tubing. The wax rods are melted thus forming heat transfer conduits. An insulating foundation of polymethane is foamed in place between the rear face of the boxes and the rear face of the contoured walls. Thereafter, the electroformed envelope is severed about its periphery and the mold halves are removed for use with low pressure injection molding apparatus. Floating connectors associate the contoured walls of the mold with the frame members of the box so that relative thermal expansion of the box independently of the contoured walls is possible.
摘要翻译： 模具是通过提供相对便宜的材料，优选木材的主人来生产的。 木材涂有将要生产的最终产品的质地和尺寸的材料。 涂层材料必须对电镀液是惰性的，并且必须是导电的，以允许电镀溶液在其上沉积。 由此制造的主机电铸以提供铜，镍或其周围的混合物的金属外壳。 为每个轮廓墙提供一个在一端开口的盒子，包括后板和周边框架构件。 蜡棒安装在电铸信封上。 蜡棒与金属管的端部连通。 将一层硅橡胶或类似材料施加在蜡棒和管的端部上。 蜡棒被熔化，从而形成传热导管。 多个甲烷的绝缘基础在箱的后表面和轮廓墙的后表面之间发生位置。 此后，电铸外壳围绕其周边切断，半模被移除以与低压注塑设备一起使用。 浮动连接器将模具的轮廓壁与箱体的框架构件相关联，使得箱体的相对热膨胀独立于轮廓壁是可能的。
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公开(公告)号：US3671168A
公开(公告)日：1972-06-20
申请号：US3671168D
申请日：1971-06-09
发明人： NUSSBAUM FRANK J
CPC分类号： B29C44/3419 , B29C33/04 , B29C33/046 , B29C33/56 , B29C35/007 , B29C44/0407 , B29K2105/04 , Y10S264/83
摘要： THIN WALLED MOLDS HAVING A THICKNESS WITHIN A RANGE FROM ABOUT 0.4 MM. TO ABOUT 4 MM. AND HAVING A HEAT CAPACITY LESS THAN THE HEAT CAPACITY OF THE MOLDED ARTICLE ARE PROVIDED IN APPARATUS FOR INJECTION MOLDING OF PLASTIC FOAM. IN CERTAIN EMBODIMENTS, HEAT TRANSFER FLUID IS CIRCULATED IN A ZONE ADJACENT THE THIN WALLED MOLD FACE. IN SOME EMBODIMENTS OF THE INVENTION, AN OUTER SHELL CAN PROVIDE SUPPLEMENT STRUCTURAL STRENGTH, WHILE BEING INSULATED BY CLOSED PORE INSULATION FROM THE TEMPERATURE CHANGES AND HEAT CAPACITY FEATURES OF THE MOLD FACE.
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6.发明授权Apparatus for simultaneously opening valves for plurality of injection nozzles 失效同时喷射多孔喷射阀同时打开阀门的装置
公开(公告)号：US3571856A
公开(公告)日：1971-03-23
申请号：US3571856D
申请日：1969-05-14
发明人： VOELKER WALTER D
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.
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公开(公告)号：US3512216A
公开(公告)日：1970-05-19
申请号：US3512216D
申请日：1968-03-26
发明人： VOELKER WALTER D
CPC分类号： B29C44/425 , B29C33/0077 , B29C45/1781 , B29C45/20 , B29C2045/202 , Y10S264/83
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公开(公告)号：US3733161A
公开(公告)日：1973-05-15
申请号：US3733161D
申请日：1972-09-15
发明人： NUSSBAUM F
CPC分类号： B29C45/26 , B29C33/04 , B29C33/56 , B29C44/428 , B29C45/73 , Y10S264/83
摘要： Each of the two sections of a separable mold for a giant plastic article includes a box having a contoured wall as one end face. The giant article is molded in the cavity defined by the pair of contoured walls. Each contoured wall is thin, heat conductive, and of low specific heat. A plurality of conduits on the rear face of each contoured wall direct the flow of heat transfer fluid to regulate the temperature of a zone of the contoured wall. A relatively high density cellular polyurethane serves as an insulating foundation between the rear face of a contoured wall and the plate of the box and also provides support for the contoured wall. A relatively thin layer of silicone rubber or like material is provided between the cellular polyurethane and each contoured wall. The contoured wall can undergo thermal expansion or contraction throughout or in selected zones without losing its bond to such cellular foundation. Floating connectors associate the contoured walls with frame members of the box, whereby relative thermal expansion of the box independently of the contoured wall is possible.
摘要翻译： 用于巨型塑料制品的可分离模具的两个部分中的每一个包括具有作为一个端面的成型壁的箱体。 巨大的物品被模制在由一对轮廓的墙壁所限定的空腔中。 每个轮廓的墙体都是薄的，导热的，并且具有低的比热。 每个轮廓壁的后表面上的多个导管指导传热流体的流动以调节轮廓壁的区域的温度。 相对较高密度的蜂窝状聚氨酯用作隔墙基础，在隔墙的后表面和箱体的板之间，还为轮廓墙提供支撑。 在蜂窝状聚氨酯和每个成型壁之间提供相对薄的硅橡胶或类似材料层。 成型墙壁可以在整个或选定的区域内经受热膨胀或收缩，而不会失去与这种蜂窝基础的连接。 浮动连接器将轮廓的墙壁与箱体的框架构件相关联，由此可以独立于轮廓墙壁的相对热膨胀。
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公开(公告)号：US3543348A
公开(公告)日：1970-12-01
申请号：US3543348D
申请日：1968-08-14
发明人： NUSSBAUM FRANK J
CPC分类号： B29C44/427 , Y10S264/83
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公开(公告)号：US3744775A
公开(公告)日：1973-07-10
申请号：US3744775D
申请日：1972-02-02
发明人： GREENBERG W
CPC分类号： B29C44/461 , B01F3/04446 , B01F3/20 , B01F3/2057 , B01F5/0408 , B01F5/0476 , B01F5/0646 , B01F5/0653 , B29B7/7419 , Y10S261/26 , Y10S261/75
摘要： Gas is injected into a flowing stream of molten plastic to provide a mixture containing an amount of gas which at ambient conditions would constitute about 10 percent to about 98 percent of the volume of the mixture. A relatively thin, large diameter annular stream of molten plastic advances through the mixing zone, the gas being injected into the mixture through at least one of the generally cylindrical walls of the mixing zone. Of particular importance, the gas is injected through a porous wall having more than a thousand openings per square centimeter, such as an ultra-fine sintered glass filter type of gas diffusion member. Each of the walls of the mixing zone is desirably tapered, so that the thickness of the molten cellular plastic effluent is greater than the thickness of the entering stream. The mixture advances through a length of mixing zone which is from about 10 to about 100 times the marginal increase in thickness of the stream. The effluent from the mixing zone flows through a heated stabilization zone which is several times longer than the mixing zone. The stabilized mixture can then be reshaped for flowing into streams utilizing the mixture of molten plastic and gas.
摘要翻译： 将气体注入流动的熔融塑料流中以提供含有一定量气体的混合物，其在环境条件下将构成混合物体积的约10％至约98％。 相当薄的大直径的熔融塑料的环形流进入混合区，气体通过混合区的大致圆柱形的壁中的至少一个注入混合物。 特别重要的是，气体通过具有每平方厘米多于一千个开口的多孔壁注入，例如超细烧结玻璃过滤器类型的气体扩散构件。 混合区域的每个壁期望地是锥形的，使得熔融的多孔塑料流出物的厚度大于进入流的厚度。 混合物前进一段长度的混合区，其为流的边缘增加的约10至约100倍。 来自混合区的流出物流过比混合区长几倍的加热稳定区。 然后可以利用熔融塑料和气体的混合物将稳定的混合物重新成形以流入料流。
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