311results about How to "Achieve molding" patented technology

The invention provides an integral forming technology for a hollow multi-cavity special-shaped surface composite material complex structural member. The technology includes the steps that low-melting-point alloy is subjected to low-pressure casting, and a fusibility mold core is obtained to serve as a mandrel; the prepreg or fabric is laid on the outer surface of the mandrel of the fusibility mold core to be made into a prefabricated part; and after the mandrel with the prefabricated part and an outer mold body of a workpiece mold are subjected to die assembly solidification, a composite material grating workpiece with the fusibility low-melting-point alloy mandrel is placed into a drying box, and accordingly a qualified composite material grating is obtained after fusion. The integral forming technology for the hollow multi-cavity special-shaped surface composite material complex structural member solves the integral forming problem of the hollow multi-cavity composite material complex structural member with the complex inner contour and curvature, the low-melting-point alloy is used for preparing the mandrel, the cost is much lower than that of a metal mandrel, the manufacturing cycle is short, efficiency can be improved, the processing difficulty and technique implementation difficulty are low, and demolding can be performed easily.

The invention discloses a brick molding device which comprises a mold pressing device and a mold receiving device, the same guiding device is adopted in the vertical moving process of the mold pressing device and the mold receiving device, a mold placing area is arranged on the mold receiving device, supporting arms are arranged on two sides of the mold placing area, and a mold locating device is further arranged on the mold receiving device. The invention further discloses equipment provided with the brick molding device. Functions of receiving, locating, pressing and drawing of molds can be achieved by arranging only one mold receiving device so that the mold receiving device can be matched with the structures of a groove and a locating hole of the brick molding mold, operation is convenient, structure is simple, and production efficiency is improved.

The invention discloses a high-unwinding-tension spandex oil preparation, which comprises the following components: 40-90% of mineral oil, 5-60% of dimethyl silicone oil, 1-10% of functional modified silicone oil and 3-15% of high-carbon isomerized fatty alcohol, and the sum of content percentages is 100% by total weight. The oil preparation disclosed by the invention is mainly applied to dry spinning, and has an outstanding characteristic that fibers both have a moderate astringent sliding degree so as to facilitate the forming of the fibers, and have an extremely good lasting barrier property so as to prevent inner-layer yarn bundles from being adhered, namely, the fibers are slidable but astringent, and astringent but non-stick, so that the astringent sliding degrees between fibers are kept, and the friction among fibers and metals is reduced, therefore, good astringent sliding property, permeability, antistatic property and unwinding property can be given to fibers, and then the perfect unification of forming and unwinding is achieved.

The invention discloses a three-dimensional printing method, wherein a melt enters a three-dimensional printing device to print a finished product. The three-dimension printing device comprises a three-dimensional moving mechanism, a working platform mechanism and a computer control and driving system; the melt is made from a modified nylon material formed by a nylon resin matrix and a tackifying nucleating agent; the tackifying nucleating agent is prepared by compounding of ion liquid and nano carbon filler; and the ion liquid is formed by anions and cations, wherein the anions are alkyl imidazole ions. The device disclosed by the invention has the advantages of being simple and compact in structure, high in automation degree, easy to control, high in precision, high in efficiency and high in adaptability; the modified nylon material provided by the invention can effectively avoid edge warping during 3D printing; and a finally printed product has the advantages of being excellent in mechanical property, good in dimension stability, smooth in surface, low in cost and the like.

The invention relates to a light epoxy foam-based sandwich plate. The plate comprises an exterior panel, an epoxy foam core and an inner skin from outside to inside in sequence, and the epoxy foam core is formed by foaming an epoxy foam-based composite material which is prepared from a two-component system with a component A and a component B at the weight ratio being 100:(30-80), wherein the component A is prepared from 100 parts of epoxy resin, 5-20 parts of flame retardant, 1-10 parts of foaming agent and 0.5-1.5 parts of coupling agent, and the component B is prepared from 1-100 parts of curing agent, 1-10 parts of foaming agent, 0.5-5 parts of flame retardant and 1-10 parts of curing accelerator. Accordingly, the plate is prepared through a secondary on-site foaming process method, byconducting foaming after placing is conducted for 4-24 h at room temperature, reacting is conducted for 1-3 h at 110-140 DEG C, and secondary foaming and curing molding are conducted. Accordingly, integrated completion of filling, encapsulation and bonding can be achieved, the epoxy foam-based sandwich plate is easy to mold and is not limited by the sandwich plate shape and type, the thermal insulation, sound insulation and flame retardant properties are achieved while weight lightening is achieved, no toxic gas is generated in the case of fire, the good environmental-friendly performance isachieved, and the plate can be used for densely populated places.

The invention discloses a cartilage-bone-marrow composite tissue structure based on 3D living cell printing and a method of the cartilage-bone-marrow composite tissue structure. Biological informationof bone tissue is collected and input into a computer for biomimetic modeling, and bio-ink suitable for cells such as cartilage, osteogenesis, mesenchymal stem, vascular endothelium, etc., is prepared; hard materials for printing dense bone area are prepared; various casting agent is prepared; living cells are inoculated into corresponding bio-ink at a certain density; and various types of printing ink are loaded into a printer bin correspondingly, 3D printing is carried out after setting printing parameters, and printed bone tissue is cultured in a tissue engineering bionic incubator. Aftera certain time, the method of temperature control or enzyme control or light control is used to remove casting agent materials at different times, artificial blood vessels are grafted on the outside of the cartilage-bone-marrow composite tissue, and continuous circulation perfusion cultivation is carried out in the tissue engineering biomimetic incubator, so as to achieve the pre-maturation of printed tissue, and the long-term survival and biological function of 3D printing bone tissue can be realized.

The invention relates to a low-melting-point thermoplastic solid propellant and a preparation method thereof, and belongs to the technical field of composite solid propellants. The propellant is prepared from the following components by mass percent: 55%-70% of oxidant, 10%-20% of thermoplastic elastomer binder, 10%-20% of plasticizer, 5%-20% of metal fuels and 3%-8% of auxiliaries. The prepared low-melting-point thermoplastic solid propellant has the advantages that melting mixing and forming of the thermoplastic propellant at a relatively low temperature lower than 95 DEG C can be realized,process safety of thermoplastic propellant preparation is greatly improved, a curing and cross-linking process in comparison with a thermoplastic propellant is cut out, process flow is shortened, production efficiency is improved, production cost is reduced and repeated processing of waste products can be realized.

The invention provides woven 2D+2.5D profiling fabric composite fabric and a forming method thereof. The fabric is formed by combining one or two 2D structural unit sets with n layers and a 2.5D structural unit set with m layers. When the number of the 2D structural unit set is one, the 2D structural unit set serves as an outer layer, and the 2.5 structural unit set serves as an inner layer. When the number of the 2D structural unit sets is two, the 2.5D structural unit set serves as a middle layer, and the 2D structural unit sets serve as both the inner layer and the outer layer. From inside to outside, the outer diameter of each layer of the unit set is the same as the inner diameter of a layer of the unit set on the outer side of the unit set. The forming method of the woven 2D+2.5D profiling fabric composite fabric includes: 1) 2D and 2.5D profiling fabric is woven by adopting a plane profiling weaving mode; and 2) after the two kinds of structural unit sets are formed independently, cover die shaping is performed by a core mold according to sizes of the inner diameters of the unit sets. The woven 2D+2.5D profiling fabric composite fabric is rapid in forming, low in cost and good in evenness, can be applied to forming of variable cross-section fabric and forming of cylindrical fabric, and is high in damage tolerance, resistant to impact, resistant to delamination and anti-fatigue.

The invention provides a Fe-Si-B amorphous alloy-copper laminated composite material and a preparation method thereof. A vacuum diffusion connection testing machine is used, and Fe-Si-B amorphous alloy and copper are welded to form the laminated composite material through a diffusion welding method. In preparation, at super-cooled liquid-phase region temperature of the amorphous alloy, plastic deformation is performed on the amorphous alloy and the copper through pressure effect, connection surface oxidation films are removed, fresh surfaces of the amorphous alloy and the copper are contacted tightly, connection interface diffusion process is promoted through thermal insulation and pressure maintaining simultaneously, and an iron-based amorphous-copper laminated composite material of a large size is prepared under the precondition that crystallization of the amorphous alloy is avoided. By adopting the technical scheme, process parameters are controlled strictly and accurately, and the large-size composite material with good connection performance and broadband shielding performance is obtained.

The invention relates to the technical field of 3D printing devices, and discloses a multi-electron-beam fusing and milling composite 3D printing device which comprises a base. A machining platform is arranged on the base which is provided with a powder laying structure. A plurality of electron beam transmitting structures and milling heads are arranged on the machining platform. The electron beam transmitting structures are arranged outside the milling heads in a surrounding mode at intervals and transmit electron beams to fuse different areas of a metal powder layer so as to form a plurality of single-layer or multi-layer approximate bodies. The milling heads mill the single-layer or multi-layer approximate bodies respectively. By means of the 3D printing device, the removal type machining process with laser milling as the main part and the incremental laminated manufacturing process with electron beam fusing 3D printing as the main part are integrated, and the deflects of the size and shape of the 3D printing technology are overcome; for large-size parts, the electron beams fuse different areas, milling is then conducted through the milling heads, and parts can be formed in any large sizes.

The invention discloses a forming process of a brick in a composite structure. The forming process includes the steps that a mold frame supporting plate is conveyed to first forming equipment by a first continuous conveying device, the mold frame supporting plate is pressed to be a mold frame on the first forming equipment, and after material distribution and pre-pressing, the mold frame is sent to a second material distribution machine and second forming equipment to complete second material distribution and pressing. According to the forming process, different brick courses are formed on the different forming equipment, and pollution between materials in different layers is thereby avoided.

The invention provides a preparation process of a graphene conductive film. The preparation process is of simplicity and has high efficiency. According to the preparation process, a dry preparation process is adopted. The dry preparation process includes the following steps that: a graphene-based conductive functional agent, a binder dispersion, and an auxiliary are thoroughly mixed so as to forma semi-dry slurry; and the semi-dry slurry is subjected to a vertical rolling procedure a, a guide traction procedure b, a thermal rolling procedure c, a transfer procedure d, a cold rolling proceduree and a blowing procedure f, so that a graphene conductive film is obtained. With the preparation process of the invention adopted, the continuous preparation of the graphene conductive film is realized, process steps such as mixing and dispersing, slurrying and coating are avoided; and the procedures are optimized, and efficiency can be improved, and therefore, costs can be saved, high-speed non-stop preparation is realized, and a process flow is simplified.

The invention discloses a molding die for a satellite reflector composite center fixing ring, comprising: a die sleeve assembly, wherein a storage space is arranged in the die sleeve assembly; a positioning component, wherein the positioning component is disposed in the storage space; a wedge assembly, wherein the wedge assembly is disposed in the storage space and around the positioning component. The positioning component includes: a core disposed at the bottom of the storage space; first splicing block units, the first splicing block units sleeving the outer side of the core; second splicing block units, the second splicing block units being disposed on the outer side of the core and on the first splicing block units; and a pressure plate, the pressure plate sleeving the outer side of the core. Compared with the prior art, the present invention has the following advantages of: 1, improving the feasibility of the center fixing ring; 2, realizing the integral molding of complex ribs of multi-layer flanges; and 3, achieving an effective weight loss.

The invention discloses a four-station dual-end process automation production line which comprises a rough milling station, a fine milling station, a drilling station and a tapping station which are formed by two tri-axial linkage rough milling mechanisms, two tri-axial linkage fine milling mechanisms, two tri-axial linkage drilling mechanisms and two tri-axial linkage tapping mechanisms, wherein the two tri-axial linkage rough milling mechanism, the two tri-axial linkage fine milling mechanisms, the two tri-axial linkage drilling mechanisms and the two tri-axial linkage tapping mechanisms are respectively positioned on two sides of a chain, so that two end surfaces of a workpiece can be simultaneously processed by two processing mechanisms at each station; the production line also comprises multiple fixture devices used for clamping the workpiece, and the workpiece is conveyed to the four stations by a chain of a fixture circulating device. After the fixture devices sequentially pass the four stations, processing of the workpiece is finished, so that the four-station dual-end process automation production line is capable of realizing molding of the workpiece only by virtue of once positioning, thus improving the working efficiency and improving the processing precision.

The invention discloses a modular flexible packaging system for liquid packages. The modular flexible packaging system comprises a rack (1), wherein a liquid package splitting conveying line (2) and apackaging box conveying line (3) are arranged in an inner cavity of the rack (1) in parallel, an integration platform (7) is arranged on the tail end of the liquid package splitting conveying line (2), a packaging box module (4), a partition module (6), an integration box loading module (7) and a box pushing module (8) are arranged in sequence in the operating direction of the packaging box conveying line (3), the packaging box module (4) is used for supplying packaging boxes, the partition module (6) is used for supplying partitions put in the packaging boxes, the integration box loading module (7) is used for integrating the liquid packages and then grabbing the liquid packages so as to be put in the packaging boxes, and the box pushing module (8) is used for pushing the packaging boxesloaded with the liquid packages to a box sealing conveying line (91) of a box sealing module (9), so that box sealing is completed by a box sealing mechanism (92). According to the modular structureof the modular flexible packaging system, different liquid packages can be packaged only by replacing different tools and fixtures.

The invention discloses a pitch-free bonding cathode carbon block material for an aluminium electrolysis cell and a production method of the pitch-free bonding cathode carbon block material. The production method of the pitch-free bonding cathode carbon block material comprises the following steps: carrying out dry blending on 60%-98% of calcined coke with different grains and 2%-50% of artificial graphite in weight percentage until the mixture is uniform, then adding 7%-13% of modified phenolic resin in weight percentage, carrying out wet mixing until the mixture is uniform and then discharging; ageing the wetly mixed material for 24-48 hours at room temperature and then placing the aged material into a normal-temperature moulding die for vibration moulding, or directly placing the wetly mixed material into the moulding die for moulding without aging; and carrying out roasting, machining and the like, so that the finished cathode carbon block product is obtained. The production method of the pitch-free bonding cathode carbon block material has the advantages that modified phenolic resin is adopted as a bonding agent, so that harm to a human body and environment pollution caused by a pitch bonding agent in the prior art are alleviated; the production method of the pitch-free bonding cathode carbon block material realizes that material mixing and moulding operation are carried out at room temperature; the cathode carbon block produced by the production method has the characteristics of high strength, good thermal conductivity, high electrical conductivity and molten salt corrosion resistance, and the service life of the aluminium electrolysis cell with the cathode carbon block can be effectively prolonged.