7results about How to "Short molding cycle" patented technology

This invention discloses a permeable high-strength sidewalk paving slab based on coal gangue. The paving slab is made from the following raw materials in parts by weight: 80-95 parts coal gangue aggregate and 5-20 parts polyurethane adhesive. The particle size of the coal gangue aggregate is 5mm-20mm, of which the weight percentage of particles smaller than 10mm is 30%-50%. Furthermore, this invention also discloses a method for preparing the sidewalk paving slab, which involves crushing, screening, washing, and drying the coal gangue, then loading it into a mold, vibrating to compact it, spraying with polyurethane adhesive, curing at room temperature, and then demolding. The coal gangue-based permeable high-strength sidewalk paving slab of this invention requires no sintering, has a simple process, is low-carbon and environmentally friendly, has a compressive strength of not less than 30MPa, a flexural strength of not less than 5MPa, and a porosity of 15%-25%. It combines high strength and high permeability, can absorb large quantities of coal gangue solid waste, and is suitable for municipal roads, squares, and landscape paving, offering good economic and environmental benefits.

The utility model relates to the technical field of antenna protection equipment discloses a kind of lightweight recyclable thermoplastic radome, including the cover body made of thermoplastic composite material, hollow interlayer structure is arranged in the wall of the cover body;Thermoplastic composite material is with thermoplastic resin as matrix, and with fibre fabric as reinforcing material.A kind of lightweight recyclable thermoplastic radome, all adopt thermoplastic material, product life cycle end can be recycled by heating melting and realize the recycling of material, solve the environmental pollution problem of thermosetting composite material.

This invention relates to the field of centrifugal molding technology, and more particularly to an energy-saving, high-efficiency centrifugal molding device for cement poles. The device includes a base, on which an annular steel mold is mounted. The annular steel mold comprises an upper steel mold and a lower steel mold, on which multiple first arc-shaped strips and multiple second arc-shaped strips are respectively installed; a first cover plate and a second cover plate, respectively disposed on both sides of the annular steel mold; a central sleeve fixedly connected to the first cover plate; and a rotating assembly disposed on the first cover plate. The central sleeve of this invention incorporates an air-bag compression vibration mechanism. Through a rotating shaft, the compression ball periodically compresses the air bag, generating high-frequency micro-vibrations that allow the concrete slurry to flow fully, effectively expelling internal air bubbles and pores. This significantly improves the density, impermeability, and frost resistance of the pole, extending its service life and benefiting the production of cement poles.

The application discloses a powder core wire for a gearbox valve body with super high strength and toughness, which comprises a powder core and a sheath. The powder core is composed of the following powders in percentage by mass: carbon powder 0.5%, manganese powder 10%-15%, chromium powder 10%-15%, nickel powder 15-20%, titanium powder 1%, silicon powder 1%, molybdenum powder 2%, copper powder 2%, CeO2 powder 1.5%-2%, and iron powder in the rest. The sheath is a low-carbon steel belt. The filling rate of the powder core wire is 20wt%-25wt%. The powder core wire is used for 3D printing to manufacture a super high strength and toughness structural member. The application also discloses a gearbox valve body with super high strength and toughness, a preparation method of the powder core wire for the gearbox valve body with super high strength and toughness, and a preparation method of the gearbox valve body with super high strength and toughness.

This invention discloses a high-toughness, weather-resistant sheet molding compound and its preparation method, belonging to the field of fiber-reinforced composite materials technology. The composite material, by weight, comprises: 38-45 parts of a matrix resin composed of unsaturated polyester resin, vinyl ester resin, and carboxyl-terminated nitrile butadiene rubber; 32-38 parts of reinforcing fibers consisting of a mixture of glass fibers and basalt fibers with a length of 5-7 mm; 22-28 parts of filler; 2.5-3.5 parts of a curing system; and 6-8 parts of functional additives containing a core-shell toughening agent, a 1:1 mixture of benzotriazole and hindered phenols, and an anti-aging agent. The preparation method includes resin matrix preparation, slurry mixing, impregnation and curing, and hot-pressing curing. This invention solves the technical problem of balancing high toughness and long-term weather resistance in the field of sheet molding compounds through the triple synergy of resin toughening, particle toughening, and fiber reinforcement, as well as the time-complementary protection of the anti-aging agent. It is suitable for harsh environments such as electrical equipment housings and rail transit components.

The application discloses a kind of high light transmittance high toughness polyvinyl alcohol hydrogel and preparation method thereof, belong to high polymer new material technical field.The hydrogel uses the trimer formed by 2-hydroxyphenyl boronic acid in the mixed solution of water and organic solvent as crosslinking agent, and polyvinyl alcohol is formed into homogeneous solution under heating stirring, and pre-gel is obtained by centrifugal defoaming, standing, and finally solvent replacement is obtained high light transmittance high toughness polyvinyl alcohol hydrogel, structure is as shown in formula (I), wherein, m is the integer of 1~100, n is the integer of 5~2000.The method is simple and easy to operate, and the condition is mild, without high temperature and high pressure or repeated freeze-thaw, and the forming cycle is short.The obtained hydrogel has excellent light transmittance and high toughness, and can be widely applied in optical devices and industrial bearing fields.The achievement provides a new strategy for preparing high-performance polyvinyl alcohol hydrogel.

The application provides a manufacturing method of high-end ceramic material complex components based on laser 3D printing, which comprises the following steps: first, decomposing a gaseous precursor into ceramic monomers by using a high-energy laser; then, controlling the distance between a flat-field focusing lens and a substrate and the laser scanning speed; controlling the laser orientation by using a scanning galvanometer system to realize layer-by-layer scanning, so as to obtain a ceramic sheet with a required shape; finally, stacking each ceramic sheet on the substrate in sequence to obtain a high-end ceramic component with a complex structure. The method can realize in-situ preparation and rapid directional growth of ceramic materials, and the axial displacement of the substrate can fix the laser focusing distance to realize layer-by-layer stacking of the ceramic materials. Compared with conventional manufacturing methods, the manufacturing method provided by the application can greatly shorten the manufacturing period of ceramic parts, and is helpful to realize the manufacturing of high-end ceramic components with a complex structure, high purity and high performance, and has a wide popularization and application prospect.