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公开(公告)号：US20230398601A1
公开(公告)日：2023-12-14
申请号：US18037783
申请日：2022-09-05
发明人： Haoqin YANG , Zhongde SHAN , Qinjiang LIU , Jianpei SHI , Dandan YAN , Shijie DONG
摘要： A method for preparing a negative pressure film-covering frozen sand mold includes: directly obtaining a mold cavity of a sand mold through numerically controlled machining of a frozen sand blank; covering a surface, brushed with a thermal insulation coating, of the mold cavity of the sand mold with a softened thin film, and covering an outer surface of the sand mold with a back film to seal a sand box; fixing the frozen sand mold in an air extraction sand box with a vacuum chamber, and extracting air through a vacuum pump, so that the thin film tightly adheres to the sand mold through vacuum suction force; and closing the box to obtain an integral sand mold, and pouring a casting at room temperature or low temperature under negative pressure. The method is environment-friendly, and the prepared frozen sand mold has high strength and is convenient for sand cleaning.
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公开(公告)号：US20210023612A1
公开(公告)日：2021-01-28
申请号：US16519477
申请日：2019-07-23
申请人： Cheng-Kuan Wu
发明人： Cheng-Kuan Wu
摘要： A casting method includes preparing a thin shell mold which is sintered and placed in a box. Sands are buried in the box to encompass the thin shell mold. The pressure chamber is depressurized. The casting material is filled into the thin shell mold, such that the thin shell mold is disposed at a vacuum state. Then, the negative pressure of the pressure chamber is released. Then, the pressure chamber is pressurized, to form a pressure difference which presses the casting material to flow into the thin shell mold, thereby finishing the casting work. The temperature of the casting material is reduced, and the pressure in the pressure chamber is increased. Then, the casting material is cooled to form a casting product. Then, the thin shell mold is broken, and the casting product is removed.
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3.发明申请公开(公告)号：US20180369900A1
公开(公告)日：2018-12-27
申请号：US15747065
申请日：2015-11-26
申请人： SINTOKOGIO, LTD.
发明人： Takahumi OBA
摘要： A cast-iron casting, method for manufacturing a cast-iron casting, and equipment for manufacturing a cast-iron casting, which are capable of performing a plating or enameling treatment without defects on a surface of the cast-iron casting, regardless of its specifications, without decreasing productivity or increasing manufacturing costs. A mold is molded by decompressing molding sand, and a melt is poured into the mold. The inside of the mold is decompressed until the temperature of a casting formed by the melt falls to or below an A1 transformation point. The equipment includes: at least one mold; a frame feed device that moves the mold; at least one fixed suction device that decompresses the inside of the mold when stopped; at least one movable suction device that moves while decompressing the inside of the mold when the mold is moving; and a temperature sensor that measures the product surface temperature of the casting.
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4.发明授权Method for the production of frozen mould bodies and apparatus for use in the carrying out of the method 失效用于生产冷冻模具体的方法和用于执行该方法的装置
公开(公告)号：US4576215A
公开(公告)日：1986-03-18
申请号：US448897
申请日：1982-12-08
申请人： Hakon Kauserud
发明人： Hakon Kauserud
CPC分类号： B22C9/126
摘要： In the production of frozen moulds (12) or cores the freezing process is accelerated by drawing the liquefied freezing agent, such as nitrogen, used for freezing the water in the mould bodies, into or through the bodies by the application of a vacuum.
摘要翻译： PCT No.PCT / DK82 / 00027 Sec。 371日期1982年12月8日第 102（e）日期1982年12月8日PCT提交1982年4月7日PCT公布。 出版物WO82 / 03580 日期为1982年10月28日。在冷冻模具（12）或核心的生产中，通过将用于将模具体中的水冷冻的液化冷冻剂（例如氮）拉入或穿过身体，冷冻过程被加速 应用真空。
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公开(公告)号：US4567932A
公开(公告)日：1986-02-04
申请号：US612326
申请日：1984-05-21
申请人： Horst Hollenbach
发明人： Horst Hollenbach
摘要： In a vacuum moulding flask, air is removed by suction from the flask, which has been filled with moulding sand, in order to consolidate the mould. To ensure satisfactory distribution of the vacuum, suction pipes are disposed inside the flask and the suction tubes must be resistant to the thermal and mechanical stresses during moulding. The suction surfaces are either cylindrical or plane and are covered by parallel, substantially triangularly-shaped profile wires so arranged as to define narrow nozzle-shaped gaps through which the air can be sucked away.
摘要翻译： 在真空成型的烧瓶中，从填充有型砂的烧瓶中抽出空气，以便固化模具。 为了确保真空的满意分配，吸入管设置在烧瓶内部，并且吸入管必须抵抗模制期间的热和机械应力。 抽吸表面是圆柱形或平面的，并且被平行的大致三角形的轮廓线覆盖，所述轮廓布置成限定狭窄的喷嘴形间隙，空气可以通过该狭缝喷出。
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公开(公告)号：US4318437A
公开(公告)日：1982-03-09
申请号：US182429
申请日：1980-08-29
申请人： Willard E. Kemp
发明人： Willard E. Kemp
CPC分类号： B22C9/03
摘要： A metal casting system including novel process and apparatus wherein the shape of the casting is defined by a thin thermal degrading film supported by a particulate bed. A pattern having the shape of the desired casting is surrounded by the tight fitting film with one end of the pattern exposed. A particulate bed is tightly packed about the film-surrounded pattern. A reduced fluid pressure is established within the particulate bed relative to the pattern so that the surrounding film is tightly held by atmospheric pressure against the particulate bed and slightly released from the pattern. The pattern is removed from the surrounding film and leaves therein a cavity bounded by the film with the shape of the desired casting. The cavity is filled with molten metal for forming the desired casting simultaneously with the vaporization of the film. The present metal casting system is especially useful for the casting of cylindrical shapes using unique molds and a novel flask is provided for such a casting process.
摘要翻译： 一种金属铸造系统，包括新颖的工艺和装置，其中铸件的形状由由颗粒床支撑的薄的热降解膜限定。 具有所需铸件形状的图案被紧密贴合的薄膜包围，图案的一端露出。 颗粒床围绕胶片包围的图案紧密包装。 在颗粒床内相对于图案建立了减小的流体压力，使得周围的膜被大气压紧紧地保持在颗粒床上并且稍微从图案中释放出来。 将图案从周围的膜上除去，并在其中留下由膜所界定的具有所需铸件形状的空腔。 空腔充满熔融金属，用于与薄膜蒸发同时形成所需的铸件。 本发明的金属铸造系统对于使用独特的模具铸造圆柱形形状特别有用，并且为这种铸造工艺提供了新的烧瓶。
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公开(公告)号：US4157109A
公开(公告)日：1979-06-05
申请号：US723558
申请日：1976-09-15
申请人： Atsushi Toyoda , Hiroshi Kasai
发明人： Atsushi Toyoda , Hiroshi Kasai
CPC分类号： B22C9/03
摘要： In manufacturing of a mold for metal casting via the vacuum molding process, the cover for the original pattern is made of a synthetic film including, at least partly, ionomer resin component and, further preferably, the exposed surface of the cover set to the pattern is coated with a solution of an initial condensate of a thermosetting resin.High fidelity in patterning, excellent vacuum retainability, enhanced surface stability and high resistance against thermal decomposition of the ionomer cover film accompanied with considerably reduced casting defects assures high quality of the castings obtained.
摘要翻译： 在通过真空成型工艺制造用于金属铸造的模具时，用于原始图案的盖子由合成膜制成，该合成膜至少部分地包括离聚物树脂部件，并且进一步优选地，盖的暴露表面设置为图案 涂覆有热固性树脂的初始缩合物溶液。
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公开(公告)号：US3960198A
公开(公告)日：1976-06-01
申请号：US571558
申请日：1975-04-25
CPC分类号： B22C9/03
摘要： An improved method of producing a mould under a reduced pressure is described herein. In the improved method, after a main pattern (1) having a protrusion and a recess is inserted with an auxiliary pattern (8) having the same shape as said recess and having an air-tight film (9) tightly adhered on its outer peripheral surface into said recess, said main pattern (1) is fixedly placed on a surface plate (2) provided with evacuating means, and the surface of the main pattern (1) including the upper surface of said surface plate but excluding the upper surface of said auxiliary pattern (8) is covered with an air-tight film (3). Then, after said air-tight film (3) has been tightly adhered onto the surface of the main pattern (1) excluding the upper surface of said auxiliary pattern (8) and onto the upper surface of the surface plate (2) with the evacuating means of the surface plate (2), said auxiliay pattern (8) is extracted from the main pattern (1). Subsequently, after a casting frame (4) provided with pressure reducction means has been placed on the surface plate (2), solid particles (7) are filled in said casting frame (4). Still further, after the entire top surface of said casting frame (4) and the solid particles (7) has been covered with an air-tight film (10), said air-tight films (3) and (9) are adhered onto the side of the solid particles (7) by reducing the pressure within said casting frame (4) with said pressure reduction means and by recovering an atmospheric pressure within the surface plate (2), and then the main pattern (1) as well as the surface plate (2) are separated from the casting frame (4).
摘要翻译： 这里描述了一种在减压下生产模具的改进方法。 在改进的方法中，在具有突出部和凹部的主图案（1）插入具有与所述凹部相同形状的辅助图案（8）并且具有紧密地粘附在其外周上的气密膜 所述主图案（1）被固定地放置在设置有抽真空装置的表面板（2）上，并且主图案（1）的表面包括所述表面板的上表面，但不包括 所述辅助图案（8）被气密膜（3）覆盖。 然后，在除了所述辅助图案（8）的上表面以外的所述主图案（1）的表面上紧密地粘贴所述气密膜（3）之后，在所述表面板（2）的上表面上， 所述表面板（2）的排出装置，所述辅助图案（8）从主图案（1）中提取。 随后，在设置有减压装置的铸造框架（4）已经放置在表面板（2）上之后，固体颗粒（7）被填充在铸造框架（4）中。 此外，在所述铸造框架（4）的整个顶表面和固体颗粒（7）已经被气密膜（10）覆盖之后，将所述气密膜（3）和（9）粘附到 通过用所述减压装置减小所述铸造框架（4）内的压力并通过在所述表面板（2）内回收大气压力，然后主模式（1）以及 表面板（2）与铸造框架（4）分离。
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公开(公告)号：US3934639A
公开(公告)日：1976-01-27
申请号：US458039
申请日：1974-04-04
摘要： Ingots are marked by locating on a face of the ingot mould prior to casting, an indicium or indicia defining body formed of bonded particulate refractory supported on an organic foam base, e.g. polyurethane foam.
摘要翻译： 锭子在铸造之前通过定位在锭模的表面上来标记，标记或标记限定体由承载在有机泡沫基底上的粘结颗粒耐火材料形成，例如， 聚氨酯泡沫。
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公开(公告)号：US3825058A
公开(公告)日：1974-07-23
申请号：US34947173
申请日：1973-04-09
申请人： SINTOKOGIO LTD
CPC分类号： B22C9/03
摘要： A mold prepared by a vacuum sealed molding process in which, in order to prevent breakdown of the mold during pouring of a molten metal, a tubular member forming a passage serving as a communication means between the mold cavity and the atmosphere is connected to the uppermost portion of a shield member defining the cavity so that the atmospheric pressure can be imparted to the cavity even when the molten metal is being poured into the cavity.
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