17results about How to "High bonding strength between layers" patented technology

The invention belongs to the technical field of ceramic materials, and particularly discloses whisker toughened zirconium oxide-aluminum oxide composite ceramic and an additive manufacturing method thereof, the composite ceramic comprises the following components by mass: 94 parts of zirconium oxide toughened aluminum oxide ceramic and 5 parts of silicon carbide whisker; the zirconium oxide toughened aluminum oxide ceramic is prepared from the following components in parts by mass: 76 parts of aluminum oxide and 24 parts of zirconium oxide, and 3mol% of yttrium oxide is added into the zirconium oxide. According to the whisker toughened zirconium oxide-aluminum oxide composite ceramic and the additive manufacturing method thereof, the preparation method has unique design of components and process, and the preparation of a high-density and high-performance ceramic-based composite material part based on a fused deposition modeling technology is successfully realized. Further, the prepared silicon carbide whisker toughened zirconium oxide-aluminum oxide-based composite ceramic has relatively high density and excellent obdurability.

This invention discloses a multi-stage pressure- and temperature-controlled molding method for ablation-resistant missile engine casing, within the field of missile engine combustion chamber technology. The method includes the following steps: S1: Tooling and mandrel pretreatment: Cleaning and defect inspection of the mandrel for mold placement, and treating the mandrel with a release agent; S2: Metal liner surface treatment: Grinding and cleaning the outer surface of the metal liner; S3: Applying epoxy film: Applying an epoxy film to the treated outer surface of the metal liner. This invention, through meticulous pretreatment of the tooling and mandrel, grinding and cleaning of the metal liner, and precise application of the epoxy film, combined with a multi-layer intermediate compaction process during composite material winding, effectively improves the interlayer bonding strength between the metal liner and the composite material winding layer, reduces the porosity of the winding layer, and ensures the density and stability of the casing structure.

This invention provides an arc-based additive and subtractive manufacturing method based on interlayer morphology reconstruction, belonging to the technical field of metal additive manufacturing. The method includes depositing an Nth layer of metal material on a substrate to form a deposition layer with a natural wavy morphology; acquiring actual morphology data to identify peak and valley distribution characteristics and planning a subtractive manufacturing path; selectively turning the deposition surface to obtain an anti-wavy substrate; detecting the surface temperature field of the anti-wavy substrate and cooling or preheating the substrate; and repeatedly performing arc-based additive deposition of the N+1th layer on the temperature-controlled anti-wavy substrate to complete the additive manufacturing process. This invention solves the technical problem in existing technologies where the wavy morphology between layers is not addressed, resulting in subsequent deposition layers covering and permanently remaining inside the workpiece, leading to a reduced yield. It achieves the technical effect of suppressing interlayer defects, reducing porosity by 90%, and improving internal quality.

The application discloses a kind of multilayer co-extrusion forming process of anti-static ton barrel, belong to anti-static ton barrel technical field, comprising: by inside to outside sequentially by high clean induction layer, gradient dielectric adhesive layer, high barrier layer, adhesive layer, structural support layer and composite conductive outer layer of multilayer parison formed by multilayer co-extrusion;Blow molding and cooling setting;Ring copper alloy bus ring is embedded in barrel body bottom and installs elastic ground contact, and ground is led out by shielding wire.This application adds ternary hybrid conductive component in high clean induction layer and constructs quasi-continuous charge bridge, so that internal static charge is led out across interface;Gradient dielectric adhesive layer forms dielectric constant gradient and spontaneous polarization electric field, reduces charge migration energy barrier;Combination gradient cooling solidification filler orientation and inhibit thermal stress.This application realizes the efficient discharge of internal static electricity of ultrahigh resistivity liquid under the premise of maintaining the ultrahigh cleanliness of inner layer, simultaneously has excellent interlaminar bond strength and long-term environmental adaptability.

The invention discloses a constant-temperature fusion covering forming mechanism for granular resin 3D printing, and relates to the technical field of granular resin 3D printing, the constant-temperature fusion covering forming mechanism comprises a built-in frame and a third servo motor, auxiliary assemblies used for assisting feeding are arranged on the two sides of the interior of the built-in frame, and each auxiliary assembly comprises an auxiliary frame, a second hydraulic rod, a built-in plate, a material guide frame and a material guide pipe; a second hydraulic rod is arranged in the auxiliary frame. According to the constant-temperature cladding forming mechanism for granular resin 3D printing, the dual-heating design is adopted through the auxiliary assembly, heating wires in a material guiding frame and an auxiliary frame are matched with an S-shaped material guiding pipe, granular resin is fully preheated, the melting temperature is kept stable through a heat preservation layer outside a material barrel, and the situation that the forming quality is affected by temperature fluctuation is avoided; the two sets of built-in plates improve the feeding efficiency, meanwhile, a fault auxiliary discharging function is achieved, the hollow structure of the auxiliary frame and the design of a threaded cover are convenient to maintain, the phenomena of material blocking and material breaking are effectively reduced, and the printing efficiency and stability are improved.

The application discloses an aging strengthening aluminum alloy plate end face friction stir processing method and belongs to the technical field of aluminum alloy thick plate preparation and processing. The solid solution state aging strengthening aluminum alloy plate is butted with a dissimilar plate and is clamped and fixed, and a starting plate and a leading-out plate are arranged on the side of the aging strengthening aluminum alloy plate and the dissimilar plate. A stirring needle is arranged at the bottom end of a stirring head, the distance between the outer edge of the stirring needle and the end face of the aging strengthening aluminum alloy plate is 0.01-5 mm, the stirring head is screwed into the starting plate, the aging strengthening aluminum alloy plate is subjected to underwater friction stir processing treatment or liquid nitrogen cooling friction stir processing treatment, the processed aging strengthening aluminum alloy plate is taken down, and aging treatment is carried out. The application can improve the organization layering phenomenon of the plate through the plastic flow of the material in the plate thickness direction, improve the interlayer bonding strength of the plate, and effectively prevent the end face layering cracking of the plate.

This utility model discloses a pipe repair material and a pipe, relating to the field of pipe repair technology. It includes: a surface layer annularly attached to the inner wall of the pipe to be repaired, comprising a basalt chopped fiber layer and multiple layers of first polyester fiber felt. A basalt chopped fiber layer is disposed between adjacent first polyester fiber felt layers, and a first polyester fiber felt layer is disposed on both sides of any basalt chopped fiber layer. The first polyester fiber felt layer and the basalt chopped fiber layer are needle-punched together to form an integrated structure. In this utility model, the basalt chopped fiber layer is disposed between two layers of polyester fiber felt. During the needle-punching process of the basalt chopped fiber layer and the polyester fiber felt layer, the basalt chopped fiber can penetrate into the polyester fiber felt layers on both sides to provide reinforcement. The basalt chopped fiber, combined with the polyester fiber felt, can improve both the interlayer bonding strength and the corrosion resistance of the overall surface layer.

The utility model discloses a kind of compression-resistant PVC table cloth, including bottom cloth layer, first PVC layer being compounded on the upper surface of bottom cloth layer, PVC compression-resistant layer being compounded on the upper surface of first PVC layer, second PVC layer being compounded on the upper surface of PVC compression-resistant layer, and surface cloth layer being compounded on the upper surface of second PVC layer;PVC compression-resistant layer includes compression-resistant layer ontology, trapezoidal convex strip being distributed equidistantly on the lower surface of compression-resistant layer ontology, lower trapezoidal embedding groove being arranged between adjacent trapezoidal convex strip, upper trapezoidal embedding groove being arranged directly above trapezoidal convex strip, and compression-resistant buffer cavity being arranged on the two sides of trapezoidal convex strip;The table cloth is compounded between layers by PVC compression-resistant layer and first PVC layer and second PVC layer, and the compression resistance, buffering performance and overall structural stability of the table cloth are significantly improved under the action of compression-resistant buffer cavity.

The invention discloses an aramid fiber composite sheet prepared by a high-pressure reverse diffusion dry method, the raw material of the aramid fiber composite sheet is a three-layer sandwich structure, and the aramid fiber composite sheet is composed of a top layer, a middle layer and a bottom layer; the top layer and the bottom layer are aramid fiber non-woven fabrics; the middle layer is a polyphenylene sulfide superfine fiber non-woven fabric; the raw materials are subjected to high-pressure hot-pressing treatment, the polyphenylene sulfide superfine fiber non-woven fabric of the middle layer is molten and permeates and fills pores of the aramid fiber non-woven fabric of the top layer and the aramid fiber non-woven fabric of the bottom layer, continuous polyphenylene sulfide films are formed on the surfaces of the top layer and the bottom layer, and the aramid fiber composite sheet of a five-layer structure is formed. The three layers are sequentially a polyphenylene sulfide film, an aramid fiber non-woven fabric and polyphenylene sulfide mixed layer, a polyphenylene sulfide layer, an aramid fiber non-woven fabric and polyphenylene sulfide mixed layer and a polyphenylene sulfide film. The cross section and the surface of the prepared aramid fiber composite sheet are free of obvious pores, the breakdown strength is larger than 50 kV / mm, the limit oxygen index is larger than 34% while the mechanical property of the material is kept, and the aramid fiber composite sheet has good application prospects.

The utility model discloses a composite material skin wallboard forming die with a metal cover plate, which comprises a bent die template and a bent metal cover plate, the curvature of the metal cover plate is the same as that of the die template, a skin wallboard is placed between the metal cover plate and the die template, the metal cover plate is a bent frame with a hollow middle, and the metal cover plate is a bent frame with a hollow middle. The outer sides of the edges of four frames of the metal cover plate are connected with the mold template through positioning assemblies, the lower surfaces of the inner sides of the edges of the four frames of the metal cover plate are connected to the edges of the skin wall plate in a pressed mode, the edges of the skin wall plate do not interfere with the positioning assemblies, and a plurality of single-point heating devices are arranged in the four frames of the metal cover plate. According to the utility model, the problems of overlarge buckling deformation of the edge of the large-size composite material skin wallboard and overlarge tolerance during assembly caused by the overlarge buckling deformation can be reduced, and the running safety of an airplane is improved.

This invention discloses a friction stir processing technology for the end face of age-strengthened high-strength aluminum alloy sheets, belonging to the field of aluminum alloy thick plate preparation and processing technology. The process involves butt-jointing and clamping a solution-treated age-strengthened aluminum alloy sheet with a dissimilar sheet. A welding starter plate and a lead-out plate are provided on the sides of both the age-strengthened aluminum alloy sheet and the dissimilar sheet. A stirring pin is provided at the bottom of the stirring head, maintaining a distance of 0.01-5 mm between the outer edge of the stirring pin and the end face of the age-strengthened aluminum alloy sheet. The stirring head is then screwed into the welding starter plate. The age-strengthened aluminum alloy sheet is subjected to underwater friction stir processing or liquid nitrogen-cooled friction stir processing. The processed age-strengthened aluminum alloy sheet is then removed for aging treatment. This invention improves the delamination phenomenon of the sheet through the plastic flow of material in the thickness direction, increases the interlayer bonding strength, and effectively prevents delamination cracking at the end face of the sheet.

This invention relates to the field of 3D printing technology, and discloses a fiber-reinforced composite material 3D printer and printing method. The method utilizes an interlayer pressing device to heat / cool the currently deposited filament bundle under a preset interlayer pressing force, promoting interlayer fusion and improving interlayer bonding strength. It also eliminates the thermal history during filament cooling, controls the crystallization behavior, grain size, and distribution of the polymer in the printed filament, and improves the microscopic uniformity of the printed composite material. The inter-pass pressing device hot-presses and shapes the sides and top surfaces of the currently deposited filament bundle, while simultaneously performing secondary hot-pressing on the adjacent printed layer's deposited filament bundles. This allows the resin in the currently deposited filament bundle and the adjacent printed layer's deposited filament bundles to melt and flow, filling the inter-pass gaps between adjacent printed layers and improving inter-pass bonding strength.

This invention relates to the field of packaging bag technology, specifically to a moisture-proof and antibacterial composite packaging bag for traditional Chinese medicine. It comprises an outer protective film layer, a middle buffer transition layer, a moisture-proof barrier layer, an antibacterial functional layer, and an inner contact film layer. These layers are arranged from the outside in. The outer protective film layer, middle buffer transition layer, moisture-proof barrier layer, antibacterial functional layer, and inner contact film layer are composited using food-grade adhesives. The middle buffer transition layer is made of low-density polyethylene elastic film. The moisture-proof barrier layer is composited with polyvinyl alcohol high-barrier film and passivated aluminum foil film. The antibacterial functional layer uses food-grade polyolefin film as the substrate. The inner contact film layer uses food-grade polyethylene film. This invention has the following advantages: it integrates multiple benefits such as wear resistance, long-lasting moisture and oxygen barrier, active antibacterial properties, and safety and non-toxicity. Its service life and protective effect are far superior to traditional single-layer and ordinary double-layer packaging.

This invention relates to the field of papermaking processing technology and discloses a composite pulping and papermaking process for whiteboard paper, comprising the following steps: spraying waste paper raw materials with an industrial urea aqueous solution for high-concentration impregnation in a dry zone; injecting hot water for neutral high-temperature thermodynamic deconstruction to obtain a high-temperature medium-concentration pulp; instantaneously mixing the high-temperature medium-concentration pulp with cold white water in the wire section of a papermaking machine to implement rapid cooling and conformational locking to maintain the metastable open conformation of fibers; injecting anhydrous calcium chloride solution and subjecting it to high-frequency turbulent shearing to obtain a pre-crosslinked pulp; adding amphoteric starch adhesive and subjecting it to high-frequency fluid pulse shearing to complete pulse coordination crosslinking to obtain a crosslinked pulp; dehydrating and forming to obtain a wet paper web; and then subjecting it to heat shrink curing and drying to obtain whiteboard paper base paper. This invention constructs a three-dimensional ion coordination network through the synergistic effect of thermodynamic decoupling and kinetic coordination, which improves the ring crush strength index and interlayer bonding strength of the whiteboard paper base paper while repairing fiber keratinization defects, and effectively reduces the pollution load of the white water system.

The utility model discloses a paper production device with warp and weft, including rotating frock table and warp and weft special paper, the outside of rotating frock table is sequentially provided with feeding conveying unit, auxiliary material conveying unit, feeding and processing integrated unit and unloading conveying unit along the circumferential along product conveying direction, rotating frock table includes support, rotary drive motor and mesa, and rotary drive motor is fixed in support bottom and drives mesa rotation, be equipped with at least four paper positioning carrier plate on the mesa, the inside of mesa is equipped with with paper positioning carrier plate intercommunication's gas path system, feeding conveying unit includes feeding conveying track and feeding mechanical arm, and the end of feeding mechanical arm is provided with snatchs subassembly, through the automation integrated design, accurate positioning control, reasonable structure layout and optimization production process, realized the promotion of production efficiency, the improvement of product quality, the enhancement of convenient operation and the reduction of production cost.

The invention relates to the technical field of high polymer materials, in particular to a gradient functional layered counter-reconnaissance material for military camouflage and a preparation method thereof.The gradient functional layered counter-reconnaissance material for military camouflage is composed of a base layer, an interface transition layer and a functional surface layer which are compounded from bottom to top, and the total thickness and the thickness ratio of all the layers are achieved; the base layer is of a fiber interwoven reinforced porous structure and contains ultra-high molecular weight polyethylene resin, silicon carbide nanoparticles and the like; the interface transition layer is a gradient composite bonding layer and contains epoxy resin-polyurethane blended resin, boron nitride micro powder and the like; and the functional surface layer is a multi-band synergistic response layer and contains fluorocarbon resin, nano indium tin oxide particles and the like. The problems that multi-band stealth of an existing material is difficult to consider, interlayer stripping is prone to occurring and the like are solved, multi-band collaborative stealth is achieved, interlayer combination is firm, environment adaptability is high, preparation is easy and convenient, and the military camouflage requirement can be met.