462results about How to "Reduce production steps" patented technology

The invention relates to a contact material for high-voltage switches and discloses a copper-tungsten / copper-alloy integrated contact and a preparation method thereof. The copper-tungsten / copper-alloy integrated contact comprises a contact part and a conducting rod part, wherein the tungsten content of the contact part gradually decreases from head to tail. The preparation method comprises the following steps: firstly, mechanically mixing powder by a wet method to prepare copper-tungsten particles with different tungsten contents; secondly, putting the tungsten in the die cavity of a compression mold according to the weight contents of tungsten in a descending order to carry out the press forming; thirdly, putting the pressed blank in a graphite boat, and sintering and infiltrating the pressed blank in a sintering furnace in the hydrogen atmosphere to obtain the copper-tungsten alloy of the contact part; and finally, sintering the low-tungsten-content end of the copper-tungsten alloy and the copper conducting rod part or the copper alloy conducting rod part to form an integral body by using a sintering method, an electro-beam welding method or a diffusion welding method, thereby obtaining the copper-tungsten / copper-alloy integrated contact.

The invention belongs to the technical field of battery materials, and discloses a preparation method of an aluminum oxide coated lithium nickel manganese cobalt cathode material. The method comprises the steps of raw material mixing, primary sintering, doping, secondary sintering, coating and size stabilization treatment, wherein the step of raw material mixing comprises the steps that a three-dimensional efficient titled mixer is adopted, polyurethane balls serve as a mixing medium, dispersing, even mixing and smashing are conducted on lithium carbonate, a nanometer spherical nickel cobalt manganese hydroxide precursor and polyethylene glycol, and a uniform intermediate mixture is formed. The preparation method of the aluminum oxide coated lithium nickel manganese cobalt cathode material is low in primary sintering temperature, short in sintering time, simple in technology, large in specific capacity and good in cycling performance. The preparation method further has the advantages of being low in investment, reliable in technology, low in operating cost and the like, and the good economic benefit and market promotion value are achieved.

The invention relates to a cell inactivated vaccine, an egg yolk antibody injection and a preparation method of the cell inactivated vaccine. The cell inactivated vaccine comprises a porcine circovirus antigenic epitope and a goose circovirus antigenic epitope. The preparation method of the cell inactivated vaccine comprises the following steps: firstly screening high-pathogenicity strains from the porcine circovirus, then selecting a plurality of virus epitopes having antibody immunocompetence from the strains, inserting the point of the porcine circovirus antigenic epitope into a goose circovirus genome by technologies such as purification and clone, and then carrying out viral multiplication in a large scale to obtain the cell inactivated vaccine. The invention also discloses the egg yolk antibody injection taking the cell inactivated vaccine as an antibody at the same time, the injection can be used for treating porcine circovirus diseases, takes effect quickly and has remarkable effects, meanwhile, a small dose can also be used for preventing the occurrence of the porcine circovirus diseases, so that the incidence rate is reduced and the economic benefit is improved. Meanwhile, the egg yolk antibody can also be used for treating the goose circovirus diseases. The preparation has lower stimulation on a human body, the working efficiency is further improved, and the feeding cost is lowered.

The invention relates to a preparation method for a man-made lawn. The preparation method comprises the following steps: arranging warp yarns on a warp beam of a braiding machine, arranging weft yarns on the braiding machine in a direction perpendicular to the warp yarns, arranging man-made grass silk yarns on a yarn creel at the back part of the braiding machine, enabling the man-made grass silk yarns to participate in braiding of bottom cloth in a direction parallel to the warp yarns, and performing grass jacquard weaving treatment on the man-made grass silk yarns by utilizing jacquard equipment of the braiding machine; bypassing the bottom cloth for 2-10 circles by each man-made grass silk yarn to form a cluster of grass silk, setting the height of the grass silk cluster to be 10-70mm, and arranging 6-12 warp yarns between any two adjacent grass silk clusters; and arranging 3-8 weft yarns between any two adjacent grass silk clusters in the grass silk clusters arranged vertically. The preparation method is simple, easy to operate and convenient for industrial production, and pullout force of the grass silk can be increased; and the man-made lawn prepared with the method has the advantages of environmental protection, wide application range and high stability.