4results about How to "Eliminate aggregation" patented technology

This invention pertains to composite material manufacturing technology and relates to a method and structure for curing and stamping at the chamfered position of a honeycomb sandwich structure autoclave. A thermally conductive material is laid on the plane where the stamping position of the honeycomb sandwich structure is located, extending from the stamping position to the center of the plane; the thermally conductive material is positioned between the release film, the breathable felt, and the vacuum bag.

The application discloses a method, device, equipment and medium for improving uniformity of a strip steel rust-proof oil film, and belongs to the technical field of metallurgy. The method comprises the following steps: in a hot rolling process of the strip steel, the lateral crown of the strip steel is controlled to be not greater than a preset crown threshold; in a cold rolling and finishing process of the strip steel, a finishing unit rolling force is controlled to be not less than a preset rolling force threshold, a liquid residence index of a core area of a strip steel surface is within a preset first range, and a deflection is within a preset second range; in an oiling process of the strip steel, high-voltage static electricity with opposite polarities is respectively applied to an upper cutter beam and a lower cutter beam of an electrostatic oiling machine; and if it is detected that the strip steel has a raised edge wave defect, the tension of a coiler is reduced before coiling. According to the method, high-voltage static electricity with opposite polarities is respectively applied to the upper cutter beam and the lower cutter beam of the electrostatic oiling machine when the strip steel is oiled, and the lateral crown is well controlled and the low-tension coiling is combined, so that the problem of excessive oil at the edge of the strip steel is obviously inhibited, and the uniformity of the oil film is improved.

A standard solution for basic nitrogen in a simulated oil product comprises acetanilide and the simulated oil product, the simulated oil product is composed of n-hexadecane, n-undecane, cyclopentane and isooctane according to the mass ratio of 1: (1.5-2.5): (2.5-3.5): (3.5-4.5), and the purity of the acetanilide is higher than 99 wt%, more preferably higher than 99.5%; the concentration of acetanilide in the standard solution is 0.1-1g / L. N-hexadecane, n-undecane, cyclopentane and isooctane in a specific ratio are used as solvents, the molecular structure is closer to that of light fuel oil, the selected components are stable in chemical property, and the chemical stability of a standard solution can be guaranteed; acetanilide has typical characteristics of organic nitrogen compounds in oil products, and when acetanilide is used as a representative of organic nitrogen, the acetanilide is single in source and stable in chemical property; the purifying agent is used for removing trace unsaturated hydrocarbon in the simulated oil product, and polymerization of the unsaturated hydrocarbon in the long-term storage process can be eliminated. The acetanilide concentration change amplitude of the obtained standard substance solution within one year is less than 1%.

The application discloses a ventilation cabinet, comprising a cabinet body, a make-up air system, an upper make-up air module, and an upper outer make-up air outlet arranged towards a partition passage on the top side of an inner cavity, wherein the upper outer make-up air outlet is not arranged to make up air from outside a window. The application can improve the air flow organization of the inner cavity and prevent leakage of pollutants of the ventilation cabinet.