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25 results about "Vacuum assisted" patented technology
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Vacuum-assisted pultrusion preforming device for composite material
The invention discloses a vacuum-assisted pultrusion preforming device for a composite material. The vacuum-assisted pultrusion preforming device comprises a yarn threading plate, a gum dipping tank, a gum extruding roller and a vacuum-assisted preforming mold which are sequentially arranged in the pultrusion direction, wherein fiber bundles penetrate through the yarn threading plate in a layered mode, the gum dipping tank is used for containing resin, and the gum extruding roller is used for extruding redundant resin. The vacuum auxiliary preforming mold is provided with a preforming mold cavity, a vacuum cavity is formed in one section of the preforming mold cavity of the vacuum auxiliary preforming mold, an air exhaust hole is formed in the upper portion of the vacuum cavity, and a semi-permeable membrane allowing gas to pass through but blocking resin to pass through is arranged at the air exhaust hole. And the air exhaust hole is externally connected with a vacuumizing device. The vacuum-assisted pultrusion preforming device can effectively discharge microbubbles in resin and fiber bundles, effectively control uniform distribution of the content of the resin and remarkably promote full infiltration of high-viscosity resin to fibers.
Owner:JIANGSU AOSHENG COMPOSITE MATERIALS HI TECH
A method for preparing a high-performance alumina fiber reinforced ceramic matrix composite
The application discloses a kind of preparation methods of high-performance alumina fiber reinforced ceramic matrix composite, including preparation alumina fiber fabric, preparation magnesium aluminate spinel aqueous sol, preparation composite material: magnesium aluminate spinel aqueous sol is brushed on alumina fiber fabric, and after surface drying, it is laminated hot-pressing to its prepreg, then put into muffle furnace and sintered, after cooling to 25 DEG C, obtain the initial alumina fiber ceramic composite material, the alumina fiber ceramic composite material is placed in vacuum assisted impregnation device vacuum assisted impregnation, then put into oven and dried, repeat sintering-vacuum assisted impregnation-drying step, finally, sinter again to obtain the final alumina fiber ceramic matrix composite material;The composite material prepared by the application has good wave-transparent performance, strong mechanical properties, is suitable for use in extreme environments such as ultrahigh temperature and supersonic speed, and the prepared composite material has high surface flatness, is suitable for secondary processing, can be constructed in large size, and is environmentally friendly.
Owner:HUBEI NORMAL UNIV
Methods and apparatus for injection and manufacture of molded components with vacuum assist
Owner:CROCS INC
Vacuum-assisted constant-speed feeding pressure impregnation automatic equipment and use method
The invention relates to vacuum-assisted constant-speed feeding pressure impregnation automatic equipment and a use method. The vacuum-assisted constant-speed feeding pressure impregnation automatic equipment comprises a material storage tank, an impregnation mold and an overflow material tank, a flow divider is arranged between the material storage tank and the dipping mold, a feeding port of the dipping mold is communicated with a discharging port of the flow divider through a feeding pipe, a feeding port of a material distributor is communicated with a discharging port of the material storage tank through a discharging pipe, and the discharging pipe is connected with the discharging port of the material storage tank through a discharging port valve; and one end of the anti-infiltration pipeline is communicated with the discharging pipe, and the other end of the anti-infiltration pipeline is communicated with the feeding pipe. By arranging the flow divider, constant-speed impregnation of a plurality of impregnation molds is ensured, and the consistency of impregnation parameters in the impregnation molds is improved; the resin flows back and forth in the dipping mold after pouring, so that the product blank in the dipping mold is more fully dipped, the dipping effect is improved, and the quality of the dipped product is improved.
Owner:SHANDONG TAIKAI ELECTRIC APP INSULATION
Composite material raft frame integral forming method and mold
The invention discloses a composite material raft frame integral forming method and a mold in the technical field of ship structure design. The composite material raft frame integral forming method comprises the steps of prepreg blanking, mold pretreatment, layered gradual paving, hot-pressing curing and post-treatment. And through modular prefabricated body construction and a differentiated layering strategy, integral forming of continuous transition of fibers is achieved, and the interface failure risk of a traditional glue joint structure is eliminated. The mold adopts a detachable silica gel steel core design and is combined with a vacuum-assisted cold pressing process, so that the compactness and the dimensional precision of the material are ensured. By adopting the synergistic effect of a partition differentiation laying strategy and a bionic reinforcing framework, a discrete structure originally depending on glue joint is converted into an integral bearing frame with fibers naturally transited, the geometric mutation risk at the joint of the rib plate and the lower plate is eliminated, and through a closed grid structure formed by extending the laying layer through the prepreg, the strength of the rib plate and the lower plate is improved. And a load transmission path is converted from shear dependence of an adhesive layer to fiber-dominated axial continuous transmission.
Owner:JIANGSU XINYANG NEW MATERIALS CO LTD
Electromagnetic shielding composite film with controllable electric-magnetic gradient, preparation method and application thereof
The invention discloses an electromagnetic shielding composite film with controllable electric-magnetic gradient, a preparation method and application thereof. The electromagnetic shielding composite film with a controllable electric-magnetic double-gradient structure is prepared through a height-controllable vacuum-assisted suction filtration method, the upper layer of the electric-magnetic double-gradient network structure is composed of a magnetic double-metal hydroxide nanosheet (at) MXene compound, the part provides electric-magnetic synergistic loss, an impedance matching layer is formed, and the electromagnetic shielding composite film is used for conducting electromagnetic shielding on the magnetic double-metal hydroxide nanosheet (at) MXene compound. And the lower layer is formed by pure MXene with high conductivity and is used as an efficient shielding layer. An electric-magnetic dual-gradient network formed by the impedance matching layer and the conductive shielding layer and a large number of electromagnetic heterogeneous interfaces can construct an electric-magnetoelectric-magnetic loss synergistic loss effect and induce polarization loss. The impedance matching layer and the efficient shielding layer in the electric-magnetic double-gradient structure effectively construct an absorption-reflection-reabsorption electromagnetic wave loss mechanism. The obtained composite film shows ultrahigh electromagnetic interference shielding effectiveness (EMI SE) and low electromagnetic wave reflectivity at the same time.
Owner:SOUTH CHINA UNIV OF TECH
Mechanism for positioning and locking vehicle body by matching vacuum with lifting mechanism
Owner:JIANGSU DAODA INTELLIGENT TECH CO LTD
Vacuum auxiliary gum dipping equipment
ActiveCN224181177Uachieve the effect of limitingNo shakingLiquid surface applicatorsCoatingsVacuum assistedVacuum pump
The utility model discloses vacuum auxiliary impregnation equipment, and relates to the technical field of glass fiber reinforced plastic cylinder production, the vacuum auxiliary impregnation equipment comprises a workbench, the bottom end of the workbench is fixedly connected with a bottom plate, the upper surface, close to the workbench, of the bottom plate is provided with a vacuum pump, and the upper surface of the workbench is symmetrically provided with impregnation boxes; an inner cavity of the gum dipping box is communicated with the input end of the vacuum pump, the outer wall of the gum dipping box is fixedly connected with a sealing strip, and a gum inlet is formed in the upper surface of the gum dipping box. Through cooperation of the opening and closing mechanism and the auxiliary mechanism, the effect of conveniently lifting the impregnated glass fiber reinforced plastic cylinder out of the impregnation box is achieved, after impregnation of the glass fiber reinforced plastic cylinder is completed, the impregnation box is opened through the opening and closing mechanism, and in the opening process, the impregnation box drives the auxiliary mechanism to operate synchronously, so that the auxiliary mechanism lifts the glass fiber reinforced plastic cylinder out of the impregnation box; therefore, the glass fiber reinforced plastic cylinder can be taken down conveniently.
Owner:SHANGHAI TANGSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
A gas venting device for vacuum assisted high pressure die casting
The invention refers to a venting device (20) for vacuum die casting. The device comprises: an input port (15) meant to be fluidly connected to a die casting mould cavity, an output port (10) meant to be fluidly connected to a vacuum source, a gas evacuation channel (19) fluidly communicating the input port (15) with the output port (10), a cooling channel (18) fluidly communicating the input port (15) with the output port (10), a valve member (17) arranged to open and close the passage between the input port (15) and the gas evacuation channel (19). Preferably, at least a section of the cooling channel (18) has a wavy configuration. The venting device (1) optimizes the efficiency of the mould venting by means of the two channels (18, 19) to discharge the gases from the mould cavity (2).
Owner:FUNDACION AZTERLAN
A vacuum assisted resin infusion material panel de-molding workstation
The application relates to the demolding technical field and discloses a vacuum-assisted resin infusion forming material plate demolding workbench, which comprises a fixing table, a moving part and a prying knife. The fixing table is provided with a fixing table surface for placing a first plate layer and a second plate layer. The moving part comprises a moving part body and a first moving wheel connected to the moving part body. At least part of the prying knife is adapted to be inserted between the first plate layer and the second plate layer. The prying knife is connected to the moving part body, so that the prying knife is driven to move by the moving part. The beneficial effect is to improve the demolding quality and the demolding efficiency.
Owner:ZHEJIANG UNIV
Hot-pressing vacuum-assisted and segmented pressurizing and heating curing forming method and product thereof
The invention discloses a hot-pressing vacuum-assisted and segmented pressurizing and heating curing forming method and a product thereof, and belongs to the technical field of materials and processing, the forming method comprises the following steps: S1, preparing a prepreg, and laying the prepreg according to a preset laying mode to obtain a laying blank; s2, auxiliary materials are laid on the surface of the laying green body, wherein the auxiliary materials at least comprise vacuum bags; s3, the mold is closed, the interior of the vacuum bag is vacuumized, and the laying layer green body is in a vacuum state; under the condition that the interior of the vacuum bag is kept vacuum, external air pressure is applied to the laying layer green body; meanwhile, heating and curing are conducted on the laying layer green body; and S4, after curing is completed, demolding is conducted, and the composite material product is obtained through aftertreatment. The hot-pressing vacuum auxiliary forming method disclosed by the invention can effectively solve the problems that an existing composite material forming process is difficult to consider both high quality and high efficiency, and is high in cost and high in energy consumption.
Owner:CHONGQING XIANTAN CREATIVE MATERIALS TECHNOLOGY CO LTD
A vacuum hood, a vacuum assisted lifting tool and a vacuum lifting method
The present application relates to the technical field of vacuum hoisting, and particularly relates to a vacuum cover, a vacuum-assisted hoisting tool and a vacuum hoisting method. The vacuum cover comprises a sealed cover body; a connecting ring is arranged at the top of the sealed cover; an annular groove is arranged at the bottom of the sealed cover body, a vacuum extraction through hole is arranged in the middle of the annular groove, and a plurality of air guide through holes provided with air guide vacuum connection nozzles are arranged on the side surface of the sealed cover body; an air guide pipe is arranged in the sealed cover body, one port of the air guide pipe is connected to the vacuum extraction through hole, and the remaining ports are connected to the air guide vacuum connection nozzles one by one. The vacuum-assisted hoisting tool is formed by connecting a plurality of vacuum covers through vacuum hoses, and one air guide vacuum connection nozzle is connected to a vacuum extraction device through a vacuum hose. Compared with the prior art, the technical scheme is more flexible to use, and solves the problem of poor universality of the prior art.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP
Vacuum-assisted resin infusion simulation method for composite material based on dynamic grid
PendingCN122047063ADesign optimisation/simulationComputational materials scienceVacuum assistedMechanical engineering
The invention belongs to the field of composite material liquid forming simulation and prediction, and relates to a composite material vacuum-assisted resin infusion simulation method based on a dynamic mesh, which comprises the following steps: establishing a two-phase flow control equation set in a VARI mold filling process; tracking to obtain the thickness of the preform in the mold filling process of the vacuum-assisted resin infusion process, and predicting the permeability of the preform by using an exponential function fitting model; updating the grids in each time step, iteratively solving the flow field in the corresponding new grids in each time step, dispersing and solving the Laplacian equation to obtain the new grids, and updating the physical property parameters of the preform; the grid surface speed is added for the two-phase flow control equation set, and the unit volume change is corrected; and circularly updating the grid form and iteratively solving the flow field, continuously advancing the time step, and stopping calculation until a preset cycle index is reached and a preset filling threshold value is reached. According to the invention, the dynamic change of the component shape can be visually presented geometrically, and the integrated simulation of the filling process and the component shape evolution is realized.
Owner:HUAZHONG UNIV OF SCI & TECH
Noise reduction tube, vacuum assisted toilet system including noise reduction tube, and method of using noise reduction tube
Embodiments disclosed herein relate to a noise reduction tube, a vacuum assisted toilet system including a noise reduction tube, and a method of using a noise reduction tube. An example noise reduction tube includes a first end and a second end opposite the first end. The first end is configured to be coupled to an outlet of a toilet bowl and the second end is configured to be coupled to an inlet of a flush valve. The noise reduction tube defines a fluid flow path extending between the first end and the second end such that waste may flow from the first end to the second end. The noise reduction tube also includes one or more bends. Each of the bends exhibits a radius of curvature greater than about 5 cm or a length greater than about 30 cm.
Owner:BRIGHAM YOUNG UNIV
Vacuum-assisted resin infusion molding material plate demolding workbench
The invention relates to the technical field of demolding, and discloses a vacuum-assisted resin infusion molding material plate demolding workbench which comprises a fixed table, a moving part and a skid-mounted cutter, the fixed table is provided with a fixed table top for placing a first plate layer and a second plate layer, and the moving part comprises a moving part body and first moving wheels connected to the moving part body; at least part of the skid-mounted cutter is suitable for being inserted between the first plate layer and the second plate layer, and the skid-mounted cutter is connected to the moving part body so that the skid-mounted cutter can be driven by the moving part to move. The mold has the beneficial effect that the demolding quality and the demolding efficiency are improved.
Owner:ZHEJIANG UNIV
Aluminum alloy thin-wall part casting forming mold and technology for vacuum collaborative low-pressure forming
The invention discloses a vacuum collaborative low-pressure forming aluminum alloy thin-wall part casting forming mold and process, the low-pressure forming aluminum alloy thin-wall part mold comprises an upper mold, a bottom mold and a plurality of side molds matched with the bottom mold, the low-pressure forming aluminum alloy thin-wall part mold further comprises a steel core, and the upper mold, the bottom mold and the side molds are encircled and combined with the steel core to form a cavity for forming a casting; a sprue is formed in the middle end face of the bottom die. Compared with the prior art, according to the low-pressure forming aluminum alloy thin-wall casting mold and process, the interior of the mold cavity can be pumped to be in a negative pressure state through the negative pressure device, the pressure difference between the interior and the exterior of the mold cavity is formed, on one hand, air resistance and flowing resistance in the mold filling process of aluminum alloy liquid are remarkably reduced, and the defects of insufficient mold filling, cold shut and the like are overcome; residual air in the cavity and gas involved in the aluminum alloy liquid in the mold filling process are thoroughly exhausted, gas defects such as air holes and needle holes are prevented, and meanwhile oxide inclusions caused by contact of the aluminum alloy liquid and the air are reduced.
Owner:NASWAY TECH (SUZHOU) CO LTD
Ten-layer circuit board production process
PendingCN121038124AInsulating layers/substrates workingCircuit gaseous treatmentsEtchingVacuum assisted
The invention discloses a ten-layer circuit board production process. The ten-layer circuit board production process comprises the following steps: (1) material distribution; (2) manufacturing an inner layer; (3) pressing; (4) first drilling; (5) a degumming process: step 1, degumming with supercritical CO2; secondly, plasma degumming and strengthening are carried out, O2 / CF4 mixed gas is adopted, and the radio frequency power is 1500 W; (6) primary PTHs / electroplating: ultrasonic microetching is carried out before chemical copper deposition, and the frequency is 40kHz; adding sodium 3, 3 '-dithiodipropane sulfonate and polyethyleneimine into the electroplating solution; (7) first tree plugging / grinding; (8) micro-etching copper reduction; (9) performing second drilling, namely a blind hole; (10) secondary degumming + PTHs / electroplating: blind hole degumming and a vacuum-assisted permeation process are added; (11) drying the film on the outer layer; (12) outer layer etching / AOI: an AOI system is integrated with an AI defect recognition algorithm, and the copper nodule detection sensitivity is 10 microns; (13) performing solder mask; (14) characters are obtained; (15) chemical gold plating; (16) shape fishing; (17), V-cut is carried out; (18) electrical testing; (19) carrying out AVI; and (20) packaging. The occurrence rate of copper nodules is lower than 0.3%, and the qualified rate of through hole resistance is larger than 99.5%.
Owner:DIGITAL PRINTED CIRCUIT BOARD CO LTD
Vacuum-assisted soft tissue biopsy device
Devices and methods used to obtain a tissue sample utilizing a vacuum assist are disclosed. The devices include a handle, an inner cannula, and an outer cannula. The devices include a vacuum tube in communication with a sample notch of the inner cannula. The handle is actuated to drive the inner cannula into a lesion such that the sample notch is disposed within the lesion. A vacuum is generated in the vacuum tube and the sample notch as the stylet is driven into the lesion. A tissue sample is sucked into the sample notch and the outer cannula is displaced over the sample notch to sever the tissue sample from the lesion.
Owner:MERIT MEDICAL SYSTEMS INC
Vacuum assisted composite rigid drainage device and method of drainage
The present application relates to the ground treatment technology, especially to the weak ground treatment technology with high water content, in particular to a vacuum-assisted composite rigid drainage device and a drainage method, which solves the problem of poor bearing capacity improvement effect of the weak ground with high water content after dehydration in the prior art, and the need for secondary reinforcement treatment, and realizes rapid dehydration through the rigid vertical drainage assembly, the rigid horizontal drainage assembly and the vacuum-assisted device. After dehydration, the vertical drainage unit is left in the soil to directly improve the bearing capacity of the soil body for the large machinery to enter. The rigid vertical drainage assembly comprises a plurality of vertical drainage units inserted into the weak ground, the vertical drainage unit comprises a rigid plate-shaped part, the plate surface of the rigid plate-shaped part is provided with vertically distributed drainage ropes, and the outside is wrapped with a water-permeable geotextile; the rigid horizontal drainage assembly comprises a rigid drainage support layer covering the surface of the weak ground, the upper surface of the rigid drainage support layer is provided with a flexible sealing layer, and the flexible sealing layer is provided with a drainage port.
Owner:LIAOCHENG UNIV
Methods and apparatus for injection and manufacture of molded components with vacuum assist
Owner:CROCS INC
Vacuum auxiliary exhaust device and mold thereof
The invention belongs to the field of mold design, and particularly relates to a vacuum auxiliary exhaust device and a mold thereof. The device comprises a sealing mold, an exhaust pipeline and a vacuum machine which are connected in sequence; the mold comprises a demolding column, a die-casting machine table plate, a mold upper connecting plate, a sealing cover, an ejection upper plate, an ejection lower plate, a movable mold frame and a fixed mold frame which are sequentially connected. According to the device structure, it can be guaranteed that all gas in the whole cavity is continuously and effectively exhausted in the casting forming process, and the interior of the mold cavity is in a negative pressure state. On one hand, molten aluminum below the die is assisted to fill the whole die more quickly and smoothly, appearance forming of the ultrathin-wall-thickness auxiliary frame is facilitated, on the other hand, gas in the cavity is reduced, and generation of the air hole defect of an auxiliary frame casting is facilitated. And the process yield of the ultrathin-wall-thickness auxiliary frame is increased, and lightweight development of automobiles is facilitated.
Owner:CITIC DICASTAL CO LTD
A vacuum assisted forming method for solving the wrinkling of a torsionally large thickness beam for aerospace
The application discloses a vacuum-assisted forming method for solving the wrinkle of a large-thickness beam for aviation, which comprises the following steps: brushing resin, scattering setting powder, laying and locking the edges of a material sheet, hot compaction, flow channel arrangement and packaging and curing, the amount of the setting powder is calculated according to a 3%-6% coefficient to make the scattering process uniform and controllable, the edges of the material sheet are fixed and locked every certain number of layers to slow down the interlayer slip of the material sheet, the material sheet is subjected to low-temperature hot compaction and natural cooling treatment, the interlayer compaction of the whole part is ensured, the wrinkle is convenient to observe and treat in time, the interlayer of the part has high adhesion, the appearance of the part after curing is good, the internal quality is high, the whole operation process is simple and controllable, the cost is low, and the forming difficulty is reduced.
Owner:SPACE SEAHAWKS ZHENJIANG SPECIAL MATERIAL CO LTD
Vacuum coater (single chamber, fully automatic)
1. The name of the design product: vacuum grouting machine (single chamber full automatic). 2. The use of the design product: the design product is used for prestressed hole vacuum assisted grouting. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.
Owner:QINHUANGDAO QIANGDA PRECISION CASTING EQUIP MFG CO LTD
A polyimide composite helmet and a method of making the same
The application provides a polyimide composite helmet and a preparation method thereof, and comprises the following steps: spraying a release agent in an upper and lower mold, laying a release cloth on the inner mold after the release agent volatilizes, placing polyimide needle-punched felt on the release cloth of the lower mold, covering the upper mold and fixing; injecting polyurethane resin into the cavity of the upper and lower mold by using a vacuum assisted forming process, so that the polyurethane resin infiltrates the polyimide needle-punched felt; mixing high-toughness and high-strength polyimide short fibers and polyurethane resin, adding an additive and a curing agent, and stirring uniformly to form a mixture; injecting the mixture into the cavity of the upper and lower mold by using a vacuum assisted forming process; transferring the upper and lower mold to a hot press tank platform for processing and molding to obtain the polyimide composite helmet. The polyimide composite helmet prepared by the application has the advantages of high toughness and high strength, light weight, excellent impact resistance and the like, and ensures that the helmet has better aging resistance under long-term use conditions.
Owner:JIANGSU AOSHEN HI TECH MATERIALS CO LTD
Covalent organic framework / nanocellulose composite membrane for zinc-iodine battery and preparation method of covalent organic framework / nanocellulose composite membrane
PendingCN121332102ACell seperators/membranes/diaphragms/spacersSecondary cellsPolyiodideVacuum assisted
The invention discloses a covalent organic framework / nanocellulose composite membrane for a zinc-iodine battery and a preparation method of the covalent organic framework / nanocellulose composite membrane, relates to a composite membrane and a preparation method, and aims to solve the problems of zinc dendritic crystal growth and multi-iodide shuttle effect of the conventional zinc-iodine battery in a charging and discharging process. The composite membrane is formed by compounding an upper layer membrane and a lower layer membrane, wherein the lower-layer film is a nano-cellulose film, and the upper-layer film is a sulfonic covalent organic framework material, carboxylated nano-cellulose or a mixture of the sulfonic covalent organic framework material and the carboxylated nano-cellulose; the preparation method comprises the following steps: sequentially carrying out film forming on the nano-cellulose dispersion liquid and the upper-layer dispersion liquid by utilizing a vacuum-assisted film forming method, and drying to obtain the composite film. A zinc symmetric battery using the film can be circulated for 1460 hours in 1 mAh. Cm <-2 >. The capacity retention ratio of the zinc-iodine total battery under 10C is kept at 97.57% in 1500 cycles, the specific capacity can be kept at 200mAh. G <-1 > or above when the current density is 0.5-20C, and the zinc-iodine positive electrode material can be applied to the field of zinc-iodine batteries.
Owner:NANJING WIIBOOX 3D TECH CO LTD