42results about How to "Good surface finish" patented technology

The invention discloses a preparing method of refractory high-entropy alloy spherical powder. The method comprises following steps: firstly, a high-entropy alloy raw material is treated through a mechanical alloying method to obtain pre-alloying powder, and the powder is subject to vacuum sieving and then is stored under the vacuum environment; secondly, the pre-alloying powder obtained after vacuum sieving in the first step is placed in a plasma spheroidizing device to be subject to spheroidizing under the argon protection, and the refractory high-entropy alloy spherical powder is obtained.The preparing method is short in process flow, simple in process, lower in energy consumption and suitable for large-scale industrial production. The prepared refractory high-entropy alloy spherical powder has the beneficial effects of being high in sphericity degree, good in surface smoothness, uniform in granularity distribution, good in liquidity, uniform in component and the like and is suitable for the field of additive manufacturing, hot spraying and the like.

The metal grating template making process includes photoetching comprising homogenizing photoresist, exposure, developing and other steps to form photoresist grating pattern; electrolytic etching via setting metal workpiece as positive electrode inside the electrolyte with the grating pattern side set opposite to the negative electrode to etch out the exposed the grating pattern to form grooves while protecting the photoresist masked metal surface; and taking out the metal template after reaching the required etching depth, eliminating photoresist and cleaning to obtain the metal grating template. The metal grating template making process of the present invention is simple, low in cost and fast, and etched pattern is smooth and precise.

The invention discloses a shifting fork shaft and a manufacturing method thereof. The shifting fork shaft is provided with a cylindrical working area, a plurality of shifting chutes are arranged on the working area, the axial cross section of each shifting chute is in the basic shape of a circular arc, and the surface of each shifting chute is a smooth surface ground by an elastic grinding wheel. The manufacturing method comprises the following steps: (1) selecting a steel column billet, and milling a preset amount of shifting chutes on the steel column billet; (2) quenching the billet on which the shifting chutes are milled to improve the hardness of the shifting chutes; and (3) grinding the quenched billet: concretely, grinding the shifting chutes by adopting the elastic grinding wheel, and taking the shifting chutes as the finished products of shifting fork shafts after the surfaces of the shifting chutes are changed from a rough and black state into a smooth and light-reflecting state. The product of the invention has high reliability and stability, and the process of the invention has better simplicity and convenience.

The invention discloses a side feeding spiral type continuous extrusion blow molding die head. The side feeding spiral type continuous extrusion blow molding die head comprises an outer-layer structure and an inner-layer structure. The outer-layer structure comprises an outer die sleeve, an adjusting ring and an opening die, all of which are axially connected and installed in sequence. The inner-layer structure comprises a lifting rod and a core die which are axially connected and installed. The outer die sleeve, the adjusting ring and the opening die are each of an axis hollow structure. The lifting rod is collected in the outer die sleeve and the adjusting ring. The core die is collected in the opening die. The peripheral wall of the lifting rod is sleeved with a flow diverting spiral core which can axially and relatively move, and a material runner is formed between the outer wall faces of the flow diverting spiral core and the core die and the inner wall face of the outer-layer structure. A material groove is formed in the outer wall face of the flow diverting spiral core. The material groove comprises a feeding groove and multiple parallel spiral material distributing grooves, wherein all the spiral material distributing grooves communicate with the feeding groove and are arranged in parallel. A material is evenly divided into circular-ring-shaped non-weld-line pipe blanks after being diverted, the circular-ring-shaped non-weld-line pipe blanks continuously enter the die head along with the molten material, and the circular-ring-shaped pipe blanks are extruded out of the opening die to form pipe blanks meeting blow molding product technology requirements.

The invention provides a waterproof antibacterial directional shaving board. The waterproof antibacterial directional shaving board comprises an upper surface layer, a core layer and a lower surface layer, the mass ratio of the upper surface layer and the lower surface layer to the core layer is (60% to 75%):(25% to 40%), and the paving included angles between the upper surface layer and the corelayer as well as between the lower surface layer and the core layer are each 80-90 degrees. The invention further provides a preparation method of the waterproof antibacterial directional shaving board. The preparation method comprises the steps of shaving, drying, mixed spraying, drying, gluing, paving, liquid spraying and hot pressing, plate billet balancing, edge cutting, cooling, sanding and film forming. The waterproof antibacterial directional shaving board has the beneficial effects that a reaction between -NCO groups of isocyanate MDI glue in a board material of the waterproof antibacterial directional shaving board and -OH groups of shavings is complete, the gluing effect is good, and internal stress is uniformly distributed; the board material is good in overall stability, in thelong-term using or storage process, the phenomena of crack, layering, bulking and the like are avoided, and release of substances such as formaldehyde harmful to the human body is avoided; and bacterial resisting, mold preventing and insect preventing can be effectively achieved, and the antibacterial rate of the waterproof antibacterial directional shaving board reaches 99.1-99.7%.

The invention relates to the technical field of cleaning agents, and concretely relates to a fruit and vegetable cleaning agent. The cleaning agent is prepared from, by weight, 1-5 parts of an organicacid, 1-2 parts of a chelating agent, 3-8 parts of a surfactant, 0.5-2 parts of a corrosion inhibitor, 30-40 parts of an inorganic base, and the balance of water. The cleaning agent provided by the invention not only has very strong cleaning and degreasing performance on the surfaces of fruits and vegetables, but also has relatively good surface protection performance, is non-corrosive, has a good cleaning effect, and has very strong practical value.

The invention discloses a preparation method of an all-solid-waste ecological slope protection brick, belonging to the field of solid waste resource utilization. The method comprises the following four steps: blank preparation, surface material preparation, brick preparation, and maintenance forming. The slope protection brick meeting use requirements is successfully prepared by completely adopting metallurgical solid waste resources according to reasonable proportions and process parameters obtained through layered pressing, vibration pressure forming and multiple tests; and preparation costis extremely low, and the metallurgical solid waste resources are recycled.