34results about How to "Realize batch continuous production" patented technology

The invention provides a light-weight casting material. The light-weight casting material is prepared by mixing raw materials including 10 to 50 percent of rod-shaped aggregate, 0 to 45 percent of light-weight aggregate, 4 to 10 percent of silicon ash with the granularity less than or equal to 0.2mu m, 17 to 30 percent of bauxite cement, 8 to 20 percent of floating microspheres, 5 to 10 percent ofclosed-pore pearlite, 0 to 10 percent of high alumina bauxite powder and a water reducing agent. According to the light-weight casting material provided by the invention, the small-size rod-shaped aggregate is uniformly dispersed so that the firing after-shrinkage of a product is reduced, the thermal shock resistance of the casting material is remarkably improved and the service life is greatly prolonged; different amounts of the light-weight aggregate which is continuously graded are added, so that the casting material has high strength and good flowability and casting materials with different thermal conductivity coefficients can be prepared, and furthermore, an application range of the casting material is expanded.

The invention provides a gasoline engine exhaust valve seat and a preparation method thereof, belonging to the technical field of powder metallurgy. By adding chromium, molybdenum, vanadium and other alloy elements to improve high temperature performance and stability, adding WC and TiC as hard phases to improve the wear resistance of the exhaust valve seat, adding Cu powder to improve the heat dissipation performance of the valve seat, after powder mixing, pressing, Sintering and heat treatment prepare the gasoline engine exhaust valve seat. The method has less energy consumption and low cost; the microstructure is fine and uniform, and it is easy to add various high melting point alloy elements and hard phase particles, and has excellent wear resistance, high temperature performance and stability; in addition, the process has high operational stability, The repeatability is strong, and the batch continuous production of the exhaust valve seat of the high-performance gasoline engine can be realized.

The invention provides a method for preparing a sealing pad of a solid oxide fuel cell and a recovery and utilization method of waste materials generated in the method. Powder of sealing materials are subjected to ball grinding and mixing after being matched with dispersing agents, bonding agents, plasticizing agents and solvents, casting and drying are carried out after the screen net filtering and the vacuum defoamation, blanks are cut according to the overall dimension requirement of the sealing pad, multiple layers are stacked and aligned, then, PET (polyethylene terephthalate) films and stainless steel plates are sequentially padded at two sides, the materials are filled into a plastic package bag for vacuum pumping and plastic package and are then placed on a hot pressing machine for hot pressing, and the materials are taken out to be cut into the sealing pad in specified sizes. Waste materials after cutting are collected, are subjected to ball grinding and mixing after being matched with the solvents and can be continuously used for preparing the sealing pad.

The invention discloses a hollow vehicle frame design and differential pressure casting method. The hollow vehicle frame design and differential pressure casting method comprises the following steps that 1, a hollow structure with the wall thickness being 4 mm and meeting 1.5 times of safety of CAE is designed; 2, an aluminum alloy is subjected to dual-phase treatment; 3, a sand core is casted ina sand core mold, then the casted sand core is put into a negative pressure differential pressure casting mold, metamorphic aluminum alloy liquid is molded through a negative pressure differential pressure casting process, the sand core is removed after molding, and a semi-finished product of a hollow vehicle frame is obtained; 4, the semi-finished product is subjected to T6 stage temperature rising heat treatment; and 5, machining is conducted through a large four-axis machining center. According to the hollow frame design and differential pressure casting method, the prepared product is small in weight, high in safety, excellent in tensile strength, yield intensity and extended performance and wide in application range, and batch continuous production can be realized.

The invention discloses a method for preparing a nitride fluorescent powder by a high-temperature solid-phase method, and production equipment used for the method. The method comprises the following steps of: (1) detaching raw materials in an oxygen-free and water-free glove box, and mixing the raw materials in a mixing device arranged in the glove box; (2) transferring the mixed raw materials to a reduction furnace via a transition device under nitrogen protection, and solving the problems of other backflows and isolated heat transfer via a transition cabin; (3) calcining at a high temperature in a nitrogen / hydrogen atmosphere by adopting a subsection temperature control method in which three parts, a preheating area, a high-temperature area and a cooling area are formed; and (4) performing aftertreatment on the cooled sample in room-temperature air. By using the method and the equipment, the high-purity nitride fluorescent powder can be manufactured, and the central granularity of the fluorescent powder and the position of an emitting main peak can be controlled by adjusting the calcining temperature and the composition ratio of the raw materials respectively; and with the adoption of three-section calcining, preparation for the nitride fluorescent powder by the method can realize continuous production, thus greatly increasing production efficiency. The method is energy-saving, environment-friendly, and suitable for mass preparation for the nitride fluorescent powder.

The invention discloses rodlike aggregate for lightweight castable and a preparation method of the rodlike aggregate for lightweight castable. The preparation method includes: subjecting Guangxi whiteclay, a binding agent and a water reducing agent to dry mixing, then adding water, and mixing to obtain mixed paste; using a vacuum extruder to extrude the obtained mixed paste under conditions thatthe pressure is 1-2MPa, the vacuum degree ranges from -0.085MPa to -0.095MPa, and the temperature during extrusion is 15-25 DEG C so as to obtain a rodlike aggregate blank with the basic diameter being 0.6-3mm; drying and baking to obtain the rodlike aggregate for lightweight castable. By the preparation method, early-stage large-quantity mould preparation and continuous mould replacement processes are avoided, production cost is greatly reduced, production efficiency is increased by 3-5 times as compared with previous production efficiency, continuous automatic production is realized, low cost, low energy consumption and high efficiency are realized, and continuous batch production and high social and economic benefits are realized.

The invention provides a method for preparing a carbon nano tube by taking coke as a raw material and the prepared carbon nano tube. The method comprises the following steps: preparing a hollow coke rod; carbonizing the hollow coke rod; crushing a part of carbonized hollow coke rod to obtain the carbonized coke powder; mixing a catalyst with the carbonized coke powder to obtain a catalyst mixture; filling the catalyst mixture into the other part of the carbonized hollow coke rod to obtain the carbonized coke rod with the catalyst; and carrying out an arc discharge gasification reaction based on the carbonized coke rod with the catalyst as an anode, thereby obtaining the carbon nano tube. The invention also provides a single-wall carbon nano tube, a double-wall carbon nano tube and a three-wall carbon nano tube prepared by the method. According to the preparation method, the coke serves as the raw material, the positions of the reaction gas and the collected carbon nano tube are controlled, and different types of carbon nano tubes are prepared, so that the prepared carbon nano tube has the advantages of high purity, high yield, high mechanical and electronic performances and the like.

The invention discloses a substrate conveying device for inkjet printing, comprising a moving assembly, a rotating assembly, a first transfer assembly and a second transferring assembly, the rotating assembly is mounted on the moving assembly and can move along the substrate driven by the moving assembly The X-direction, Y-direction and Z-direction movement of the conveying device, the first transfer assembly and the second transfer assembly are respectively connected with the rotation assembly, and the rotation assembly can respectively drive the first transfer assembly and the second transfer assembly to perform independent rotation. Therefore, the present invention not only has the advantages of high degree of automation, ensuring ink stability in the substrate transfer process after printing, and reducing the reject rate in the printed circuit board preparation process, but also has the advantages of improving the efficiency of substrate electronic printing and reducing substrate preparation costs. , the substrate conveying device of the present invention can quickly realize accurate loading, transfer and unloading of large-format substrates, and realize batch continuous production of printed circuit boards while ensuring the accuracy of electronic printing.