103results about How to "Uniform solidification" patented technology

The invention provides a method for improving the internal organization of a casting blank of a continuous casting machine and an electromagnetic stirring device, wherein the method is as follows: atthe tail end of a continuous casting bank liquid core on a secondary cooling zone of the continuous casting machine, carrying out electromagnetic stirring and generating forward and reverse alternantspiral rotating force which causes molten steel to rotate and flow along the casting direction of the continuous casting machine and appends static pressure to a solid-liquid phase zone of the tail end of the liquid core. The method and the electromagnetic stirring device of the invention can provide enough molten steel for supplying the volume contraction during the solidification of the liquid core and eliminating shrinkage cavity and loose, thus increasing the quality of the continuous blank.

A photosensitive resin which exhibits excellent storage stability, affinity, miscibility, or solubility with respect to a variety of compounds, and high sensitivity can be solidified even under hydrous conditions as well as exhibiting high cure-related sensitivity and high flexibility and being uniformly solidified even under highly hydrous conditions, a photosensitive resin composition containing the resin, and a novel compound.The photosensitive resin is a saponified poly(vinyl acetate)-based photosensitive resin having a structural unit represented by formula (1):(wherein R1 represents H or Me; R2 represents a linear or branched C2-C10 alkylene group; n is an integer of 1 to 3; X representsm is an integer of 0 to 6; and Y represents an aromatic ring or a single bond).

A cooking double boiler including an outer pan that is heated upon pouring water therein, an upper lid that covers an upper aperture thereof, and an inner pan with a flange that is set into the interior of the outer pan. The outer pan includes a peripheral edge portion that supports the flange of the inner pan, wherein a plurality of concave portions for directing generated water vapor upward of the inner pan are located at the peripheral edge portion. The cooking double boiler has vapor spouts located between the peripheral edge portion of the outer pan and the flange of the inner pan for movement between open and closed positions.

The invention mainly belongs to the technical field of engines, and particularly relates to a shrinkage and looseness resisting casting method of air cylinder cover castings. The shrinkage and looseness resisting casting method includes the following steps that (1), a mold is manufactured; (2) an upper sand mold, a lower sand mold and a sand core are made; (3) coating is applied, and the sand coreis dried; (4) core setting is conducted, and four internal chillers are placed on the corresponding position of the upper sand mold; (5) mold assembling is conducted, and a sand box is tightened; (6)iron liquid is cast; and (7) unpacking, clearing, inspection and warehousing are conducted. The iron liquid is injected into the bottom, a balanced solidification molding process is conducted, the casting solidification temperature field is balanced, a second sand core is a resin sand core made from chromite sand and quartz sand in a mixed mode, and comprises a first chiller and a second chiller,through the structure, the heat absorption and cooling effects of the sand core are greatly improved, the temperature field in the solidification process of the casting is balanced, the purpose of balanced solidification is achieved, the probability of shrinkage and looseness of the castings in zones which are prone to shrinkage and looseness is decreased, according to the process, the position is rare shrunk and loosened after a year of machining, and the overall qualified rate of the castings reaches 95% or above.

The invention discloses a downhole cable protector comprising a first protector body and a second protector body which are movably connected by a shaft. When used, the downhole cable protector sleevesthe outer side of a coupling on a casing pipe and an optical cable is placed between the coupling and the downhole cable protector. The downhole cable protector achieves the centralization effect ofa casing centralizer, ensures the smooth return of well cementation cement slurry, and also has a function of protecting an optical fiber cable.

The invention relates to a preparation method for complex-shape niobium-based ODS (oxide dispersion strengthening) alloy by taking high-energy ball-milled niobium-based ODS alloy powder as a raw material and adopting a laser rapid prototyping technology, belonging to the technical field of refractory metal preparation. The method comprises the following steps of firstly obtaining niobium-based ODS alloy powder through a mechanical alloying technology, then depositing the niobium-based ODS alloy powder layer by layer by controlling the motion of a laser beam through two-dimensional plane information on the basis of establishment of three-dimensional model and layering slicing treatment to obtain a niobium-based ODS alloy powder green body, and finally completely compacting the niobium-based ODS alloy powder green body through hot isostatic pressing, so as to obtain complex-shape niobium-based ODS alloy parts. The method has low cost, can be used for preparing complex-shape parts rapidly and efficiently, and is applicable to final forming of niobium-based ODS alloy which is difficult to process and has high performance; the parts have high compactness, small, uniform and stable fast solidification structure, and excellent comprehensive mechanical property; and the material use ratio is high, the manufacturing period is short, and the cost is low.

The invention belongs to the technical field of wind power equipment and particularly relates to a brake cylinder of a wind power unit and a manufacturing method thereof. The brake cylinder of the wind power unit is made of low-temperature high-toughness anticorrosion nodular cast iron material QT350-22 Al by casting. The low temperature impact resistance and corrosion resistance of brake cylinder made of the low-temperature high-toughness anticorrosion nodular cast iron material are improved, and the using requirements under severe work conditions are increased and met, so that service life of the wind power unit is further prolonged, and production cost is saved effectively. A blank of the brake cylinder of the wind power unit is made by casting, so that internal quality problems of the cylinder can be solved effectively. In addition, the problems high processing amount and low processing efficiency can also be solved, product cost can be lowered evidently, and economic benefit is huge.

The invention discloses a method for producing large-size disc-type cast iron parts by means of lost foam casting, and belongs to the technical field of lost foam casting. By implementing the technical scheme comprising the steps of bead selecting, prefoaming, drying and curing, model making, model drying, connecting and combining, staining and drying, combination splitting, dry sand compacting, negative-pressure sucking, negative-pressure pouring and taking out and cleaning, the problems that the cast part surface has gaps due to the fact that a lost foam model is improper in bead selection,insufficient in model strength and large in gas generation volume and deformation in the casting production process, and the size is unqualified due to deformation are solved, and the problems such asslag blowholes, shrinkage porosity and shrinkage cavities which are generated due to the fact that cast part model combustion is insufficient, iron liquid model filling is unstable, iron liquid solidification is unbalanced, and the pressure maintaining time is insufficient are solved. According to the method, conception is novel, layers are clear, operation is easy and convenient, and implementation is easy; in addition, the product parts produced through casting are high in stability and production rate and have the propagable practical value.

The invention provides egg dried tofu and a processing method thereof, and relates to the field of food processing. The processing method comprises the following steps: after evenly mixing egg juice and water, then adding soyabean protein powder and chopping; adding salad oil and five-spice oil and then continuing chopping; adding cassava starch and chopping, adding glutamine transaminase and continuing chopping; and then refrigerating the mixture at the temperature of 0-5 DEG C for 4-24 hours to obtain the initial product of the egg dried tofu. According to the method, the dried tofu has special flavor due to the added egg, and is tasty fully in a repeated chopping process, and the processing method is simple in process and easy to operate. The egg dried tofu is obtained by the processing method, tastes good, is chewed easily, and is good in flavor.

The invention relates to the field of neutron radiation protection, in particular to a neutron radiation protection concrete block forming device capable of achieving up-and-down bidirectional discharging. The forming device comprises four side templates arranged on a rack and forming a box, and the upper and lower sides of the forming box composed of the four side templates are provided with movable die devices cooperatively; and each movable die device comprises a die lifting pull rod arranged on the rack, and each lifting pull rod is connected with a die plate which can penetrate into the forming box and is coordinated with the forming box. The invention aims to provide the neutron radiation protection concrete block forming device capable of achieving up-and-down bidirectional discharging, and the fixed side templates are coordinated with the movable die devices arranged on the upper and lower sides of the forming box; the thickness of the template of each layer can be controlled properly, and leveling can be performed; and meanwhile, concrete blocks in different thicknesses can be formed according to different requirements, and the application range of the concrete block forming device is improved greatly.

The invention discloses a novel convenient casting device for experiment, which is characterized by comprising a furnace body, a casting mould, a mobile trolley and a guide rail. The furnace body is a dumping electric induction furnace, a flat graphite crucible is arranged in the furnace body, the dumping angle of the furnace body is 0-110 degrees, the casting mould is arranged on the mobile trolley, the guide rail is an angle iron guide rail, the mobile trolley is arranged on the guide rail, a support frame is arranged on the mobile trolley, the casting mould is located in the support frame, a funnel made of graphite is arranged on the support frame, the funnel is located above the casting mould, a funnel plug is arranged in the funnel, and a through hole is formed in the funnel plug. The novel convenient casting device is wide in ingot casting production size and weight range, and is very suitable for material research and development; less scrap is generated in fusion casting production; capacity of the crucible is increased, and yield is high; and the novel convenient casting device is simple, easy to use, low in graphite change frequency, labor-saving, material-saving and cost-saving, convenient to operate, safe, simple and efficient, and high in casting quality.