32results about How to "Improve dense structure" patented technology

The invention provides a differential-speed extrusion forming method of a magnesium alloy high performance cup-shaped piece and relates to the technical field of metal and plastic machining and forming. A combined concave die is adopted and comprises a T-shaped upper concave die body and a U-shaped lower concave die body. The T-shaped upper concave die body is internally provided with a cylindrical cavity and installed on the U-shaped lower concave die body, and the section of a formed revolved cavity is shaped like a Chinese character 'shan'. Staggered 'ladder' type differential-speed extrusion steps are adopted for the bottom of the extrusion cavity shaped like the Chinese character 'shan'. Three stages of deformation are conducted, the first stage is the axial similar cylinder pier coarse deformation stage, the second stage is the radial extrusion large deformation stage, and the third stage is the corner extrusion and shearing deformation stage. The extrusion cavity shaped like the Chinese character 'shan' and the staggered 'ladder' type differential-speed extrusion steps at the cavity bottom are adopted for extruding the magnesium alloy high performance cup-shaped piece, the magnesium alloy material forming capacity is greatly improved, a high-density structure is obtained, great plastic deformation is obtained, the grain refining effect is remarkable, the effect of eliminating grain dual-mode distribution of the barrel wall of the cup-shaped piece is obvious, and the fabrication procedure of the high performance magnesium alloy cup-shaped piece is shortened.

The invention discloses a differential extrusion forming die of a high-performance magnesium alloy cup-shaped part and relates to the technical field of metal plastic machining processes and forming. A combined type female die comprising a T-shaped upper female die body and a U-shaped lower female die body is adopted. A cylindrical cavity is formed inside the T-shaped upper concave die body mounted on the U-shaped lower concave die body, and the cross section of a formed revolution body cavity is shaped like the Chinese character 'shan'. Staggered ladder type differential extrusion steps are arranged at the bottom of the extrusion cavity shaped like the Chinese character 'shan'. The magnesium alloy cup-shaped part is extruded through the extrusion cavity shaped like the Chinese character 'shan' and the staggered ladder type differential extrusion steps at the bottom of the cavity, so that the forming capacity of a magnesium alloy material is improved greatly, a high compact structure and large plastic deformation are obtained, the grain refining effect is significant, the effect of removing grain dual modality distribution of the cylinder wall of the cup-shaped part is obvious, and the manufacturing process of the high-performance magnesium alloy cup-shaped part is accelerated.

The invention relates to the field of dimming films, and particularly discloses self-compacting concrete prepared from recycled aggregate, and the self-compacting concrete prepared from the recycled aggregate comprises 40-50 parts of heat-resistant coarse aggregate, 10-15 parts of modified recycled aggregate, 30-40 parts of fine aggregate, 8-10 parts of cement, 6-10 parts of water, 4-8 parts of mineral powder and 2-5 parts of fly ash. According to the invention, the structure of the recycled aggregate in the self-compacting concrete prepared from the recycled aggregate is optimized, the compactness of the material is improved and capillary pores and microscopic cracks in the recycled aggregate are filled by coating the recycled aggregate with slurry, meanwhile, the structure of the slurry-coated recycled aggregate is round and smooth, pores formed between actually filled materials are small, and thus the compact structure of the self-compacting concrete is further improved, and the mechanical strength of the self-compacting concrete prepared from the recycled aggregate is effectively improved.

The invention belongs to the field of polymer chemistry, and particularly relates to chemical-resistant high-density polyethylene resin and a preparation method thereof. The chemical-resistant high-density polyethylene resin is prepared from, by weight, 65 to 85 parts of high-density polyethylene resin, 8 to 18 parts of xanthan gum, 0.8 to 8 parts of polyarylethynyl resin, 0.2 to 0.8 part of a cross-linking agent, 0.3 to 0.8 part of a cross-linking auxiliary agent, 0.04 to 0.1 part of a main antioxidant, 0.08 to 0.20 part of an auxiliary antioxidant and 0.5 to 8 parts of an inorganic auxiliaryagent through a reaction. The chemical-resistant high-density polyethylene resin provided by the invention has excellent comprehensive properties, especially excellent high-temperature chemical resistance, has tolerance to complex chemical corrosion environments, can be widely applied to packaging materials, geomembranes and the like of bottles, barrels and the like, and widens the application field of the packaging materials, geomembranes and the like.

The invention discloses a reaction unit for reduction distillation of titanium sponge. The reaction unit is mainly composed of a reactor and a big cover. The bottom of the reactor is provided with a screen plate. A conical tower is arranged on the screen plate and welded to the center of the screen plate. The height of the conical tower is greater than that of a titanium lump. The conical tower is of a circular conical structure. The diameter of the tower bottom of the conical tower is greater than or equal to one-second of the diameter of the screen plate. By adopting the reaction unit, the distillation efficiency and the compact structure of products can be improved; moreover, a central tube in an existing reaction unit can be omitted; and the reaction unit is simple in structure and low in manufacturing cost.

The invention discloses a reduction distillation reaction device for sponge titanium production. The reduction distillation reaction device mainly consists of a reactor, a conical tower frame, a magnesium chloride pipe and a sieving plate. The magnesium chloride pipe is arranged on one side in the reactor. The sieving plate is arranged at the bottom of the reactor. The conical tower frame is welded to the sieving plate. The sieving plate is composed of a supporting panel and a supporting frame which is in the shape like a Chinese character 'jing' and connected with the lower portion of the supporting panel. A plurality of holes are formed in the supporting panel. The supporting frame which is in the shape like a Chinese character 'jing' is composed of a plurality of vertical plates in a crossed and staggered mode. A through hole is formed in each vertical plate. The lower part of the supporting frame which is in the shape like a Chinese character 'jing' is in a nearly hemispherical shape. By means of the reduction distillation reaction device, distillation channels can be formed in the interior of a sponge titanium heap and the bottom of the reactor, the distillation efficiency isimproved, the distillation time of sponge titanium is decreased, the sponge titanium production cycle is shortened, and energy consumption is reduced.

The invention discloses a cigarette filter capsule wall material and a preparation method thereof. Mesona chinensis gum, nano chitosan and starch are used as main raw materials for preparing the wall material, formation of a composite gel network structure is dominated based on the hydrogen-bond interaction of the starch and the mesona chinensis gum, and an electrostatic compound is formed through the electrostatic attraction effect generated between the positively charged chitosan and the negatively charged mesona chinensis gum; the ternary composite system enhances the crosslinking degree of the network structure, the mesona chinensis gum and the starch interact to form the gel network structure to constrain movement of free water, and meanwhile after the nano chitosan is added, the nano chitosan forms a highly-oriented crystal domain in the ternary composite system, so that the transmission path of water vapor and oxygen is prolonged, the permeation amount of oxygen and water vapor per unit time is reduced, and the prepared wall material not only has good stability, but also has good water resistance.

The invention relates to a preparation method of an alcohol resisting type polyarylether electrolyte film material, and belongs to the technical field of an electrolytic film material. Collagen and polyvinyl alcohol are mixed to be subjected to hydrolysis to form amino acid to be grafted to the surface of a polyvinyl alcohol material; by virtue of amino modification of polyvinyl alcohol and sulfonic acid group modification processing, a macromolecule crosslinking agent with the sulfonic acid group is introduced; next, through thermal treatment, the sulfonic acid group and amino are subjected to a cross-linking reaction to prepare an amino-containing sulfonated polyarylether ketone sulfone/sulfonated polyvinyl alcohol crosslinking film; sulfonated polyvinyl alcohol has high alcohol resisting performance, and meanwhile, the sulfonic acid group and amino can exist in an acid alkali pair form by virtue of an acid alkali effect therebetween, so that proton transmission sites are provided for protons and proton conduction is promoted; and in addition, by virtue of the formed crosslinking network structure, permeation of methyl alcohol can be suppressed effectively, and the prepared electrolyte film material can be excellent in compact structure.

The invention discloses a novel ternary thermal composite material and a preparation method thereof. The material comprises the following components in volume ratio: at least 15vol% and at most 30vol% of Cu, at least 70vol% and at most 85vol% of W+diamond, at least 70vol% (W+diamond) and less than 100vol% (W+diamond) of W, and more than 0vol% (W+diamond) and at most 30vol% (W+diamond) of diamond. The preparation method comprises the following steps: selecting the raw materials including W, Cu and diamonds, weighing in proportion, mixing by using planetary ball milling, and then sintering by using vacuum hot-pressing to obtain a compact W-Cu-Diamond ternary thermal composite material. The novel ternary thermal composite material has the advantages of high compactness, uniform and stable texture structure, light weight, excellent mechanical property and thermal property and adjustable thermal expansion coefficient; the preparation process is simple and good in repeatability.

The invention relates to a preparation method of a road marking material, in particular to a preparation method of a zero-water-absorption colored road marking material, which adopts a matched curing effect among glass particles, acrylic resin and polyurethane resin to form a compact chemical structure. The surface of the material is coated with the curing film through the hydroxyl action on the surface of the material, and the purpose of zero water absorption of the filler is achieved. And the colored sand with zero water absorption enables the water-borne epoxy resin to have more excellent fluidity, so that the road marking belt can adapt to various road conditions. Based on the characteristic that epoxy groups in water-borne epoxy resin can be located at multiple positions in a molecular chain, the epoxy groups can be subjected to a cross-linking reaction with multiple groups, then a stable core-shell structure is formed and combined with colored sand, and the colored sand has an excellent compact structure, heat stability and hardness; and the wear resistance, water resistance, acid resistance, alkali resistance and aging resistance of the road marking belt are improved, namely the service life is prolonged.