13results about How to "Uniform mechanical properties" patented technology

The present application relates to the technical field of high polymer composite material, and especially to a co-extrusion fabric, a preparation method and application thereof, and is especially suitable for the field of steel-plastic composite floor which is strict in size stability and mechanical property requirement, such as building decoration, industrial floor, outdoor paving, etc., the co-extrusion fabric comprises the following raw material components in parts by weight: polyethylene: 40-70 parts; elastomer: 20-50 parts; compatibilizer: 3-10 parts; inorganic mineral: 5-10 parts; antioxidant: 0.1-1 part; lubricant: 0.5-1 part; a low-shrinkage, anti-warping polyethylene composite zinc-aluminum-magnesium alloy steel-plastic floor co-extrusion fabric is provided, by optimizing the raw material ratio, selecting special compatibilizer and inorganic mineral filler, the efficient compatibility of polyethylene, elastomer and inorganic filler is realized, the polyethylene crystalline morphology is controlled, the material shrinkage is greatly reduced, the hidden danger of warping deformation is eliminated, and the mechanical strength, toughness and weather resistance of the material are improved.

This utility model discloses a heat treatment and shaping device for polyester fiber yarn, including a drying box. A fixed frame is fixedly installed inside the drying box, and a placement plate is provided above the fixed frame. The placement plate is slidably connected to the fixed frame via a slider. A first sliding rod is fixedly installed inside the fixed frame, and the slider is slidably sleeved with the first sliding rod. A first cam is rotatably installed on the fixed frame. An installation frame is fixedly installed inside the drying box, and a movable frame is slidably installed on the installation frame. A carding frame is rotatably installed on the movable frame. Through the synergistic action of the placement plate, slider, first sliding rod, first cam, and first spring, the placement plate and the fiber yarn it carries are driven to generate controllable reciprocating vibration or oscillation inside the drying box. This dynamic treatment method effectively breaks the static structure of multi-layer stacked fiber yarn and significantly promotes the penetration and circulation of the heat medium inside the fiber layer and between different layers.

The invention discloses an elastic wire mechanism and an anti-shake lens. The filament bouncing mechanism comprises a three-dimensional elastic piece and an AF elastic piece. The AF elastic sheet comprises a carrier connecting part used for being connected with a carrier and a support connecting part used for being connected with a support. An AF main elastic wire used for resetting a carrier AF is arranged between the carrier connecting part and the support connecting part, and the AF main elastic wire comprises a functional section and a first avoiding section used for avoiding an AF dispensing groove in the carrier. The three-dimensional elastic sheet is integrally formed by etching the same base material of the elastic sheet body, the AF elastic wire and the elastic blocking sheet, a splicing link is avoided, the structural strength is high, the mechanical property is unified, and a carrier AF auxiliary reset function and a support OIS core reset function are integrated. And the AF main elastic wire is provided with a first avoiding section for pertinently avoiding a carrier AF dispensing groove, so that the normal operation of dispensing operation is ensured.

A kind of matrix self-loading photocatalytic high-strength high-toughness polymer and its preparation method, belong to the cross technical field of solid waste resource utilization and functional building materials, the raw material of the polymer includes the following components by weight parts: base activator 30-50 parts, silicon-aluminum precursor 100-120 parts, high-activity nanometer silicon powder recovered from scrap photovoltaic panel 15-25 parts, surface-modified glass fiber recovered from scrap photovoltaic panel 8-12 parts, water 10-20 parts.The present application realizes the full-value consumption of silicon powder and glass fiber components in scrap photovoltaic module by low-temperature pyrolysis, grading screening and directional modification process, activates the photocatalytic activity of recycled elemental silicon by mechanical chemical means, and assists directional interface modification to strengthen the reinforcing effect of fiber, so as to realize the deep coupling of mechanical properties and photocatalytic function in a single material system.

This invention provides a continuous ultrasonic welding apparatus and method with active thermal management, relating to the field of ultrasonic welding technology. The continuous ultrasonic welding apparatus and method with active thermal management includes: a support suspension fixedly mounted on the end face of a linear motion platform capable of linear reciprocating movement along the weld seam arrangement direction of the workpiece; at least two sets of actuators sequentially mounted and fixed on the support suspension, and the relative spacing between the actuators is flexibly adjusted by a matching adjustment mechanism. This invention solves the problem of pressure rollers gradually heating up, becoming thermally saturated, and even losing their cooling and shaping ability due to prolonged operation. It enables the pressure roller to apply effective cooling pressure to the molten zone promptly after the welding head is removed, allowing the material to cross the glass transition temperature more quickly and complete solidification and shaping. This reduces the probability of defects such as springback, warping, residual porosity, and delamination in the later stages of the weld, ensuring a more uniform forming quality and mechanical properties throughout the weld.

The invention discloses a preparation method of an oligomeric silsesquioxane material modified moisture-curable polyurethane hot melt adhesive, and relates to the technical field of adhesives. The hot melt adhesive is prepared from the following raw materials in parts by weight: 10 to 30 parts of polyether polyol, 20 to 40 parts of polyester polyol, 10 to 20 parts of methacrylate copolymer resin, 1 to 5 parts of color paste, 5 to 15 parts of heptaisobutyltrisilanol-polyhedral oligomeric silsesquioxane, 15 to 25 parts of diphenylmethane diisocyanate and 0.1 to 0.5 part of a catalyst, the preparation process comprises the steps of vacuum dehydration of raw materials, secondary dehydration after addition of TPOSS, MDI reaction, addition of a catalyst, stirring, discharging and the like. The glass transition temperature, the high temperature resistance, the aging resistance and the corrosion resistance of the polyurethane hot melt adhesive are remarkably improved, meanwhile, the good body mechanical property and the bonding strength to different base materials are kept, and the polyurethane hot melt adhesive can be widely applied to bonding of key components in the consumer electronics industry, the intelligent wearing industry and the automotive electronics industry.

This invention provides an environmentally friendly ceramic-plastic composite material, decorative panel, and its preparation method. The composite material comprises the following components by weight: 35-45 parts PVC resin powder, 40-50 parts activated waste ceramic powder, 5-18 parts polyamide filaments, 1-3 parts heat stabilizer, 1-3 parts lubricant, and 0.5-3.5 parts processing aid. This invention completely replaces traditional calcium carbonate filler with waste ceramic powder and completely replaces bamboo and wood fibers with polyamide filaments (0.5-50mm long and short mixed). Under extrusion conditions of 175-190℃, the fibers only soften and do not melt, extending and flowing synchronously with the melt, completely solving the pore and bubbling defects caused by the carbonization of bamboo and wood fibers. The product is dense, non-porous, highly tough, highly water-resistant, and aging-resistant. It adopts an online roll-press textured integrated molding process, eliminating the need for film coating and adhesive bonding. This invention can completely replace existing bamboo and wood fiberboards, carbon crystal boards, and stone crystal boards, and can be widely used in the field of interior decorative wall panels.

The application discloses a cooling mold device and a continuous casting method thereof. The cooling mold device comprises a crystallizer assembly and a mold die assembly. The mold die assembly is arranged in the interior of the crystallizer assembly, and the mold die assembly and the crystallizer assembly are conically fitted and installed. The mold die assembly comprises a mold core rod, a first fixed copper sleeve, a second fixed copper sleeve and a plurality of mold inner linings. The plurality of mold inner linings are distributed in a circular array in a circumferential direction. The mold core rod is arranged in a cavity formed between the plurality of mold inner linings. The upper and lower ends of the plurality of mold inner linings are fixed by the first fixed copper sleeve and the second fixed copper sleeve respectively. The cooling mold of the application is composed of multiple materials with different thermal conductivity coefficients arranged in the circumferential direction. The application weakens the problem that the heat exchange coefficient is strong at the lower part and weak at the upper part of the casting blank due to the gravity of the casting blank itself during the horizontal continuous casting process. The cooling during the horizontal continuous casting process is more uniform. Therefore, the casting blank with more uniform structure, composition and performance can be obtained, and the quality of the casting blank is improved.

The invention discloses a pure-carbon-dioxide-resistant anti-explosion ternary fluororubber material and a preparation method of the pure-carbon-dioxide-resistant anti-explosion ternary fluororubber material. The material is prepared by taking ternary fluororubber raw rubber as a matrix, matching magnesium oxide, calcium hydroxide, light carbon black, thermal cracking carbon black, flaky calcium carbonate, a flaky air blocking agent, a WS280 processing aid, palm wax and a fluorine-linked 5 # vulcanizing agent, and carrying out plastifying and mixing, first-stage mold pressing vulcanization and second-stage drying oven vulcanization on the matrix and magnesium oxide, calcium hydroxide, light carbon black, thermal cracking carbon black, flaky calcium carbonate, flaky air blocking agent, WS280 processing aid, palm wax and fluorine-linked 5 # vulcanizing agent. Through the physical barrier effect of the flaky filler and the collaborative design of a specific vulcanization system, the anti-permeation and anti-bubbling performance of the material in a high-temperature and high-pressure pure COenvironment is remarkably improved, and meanwhile, good mechanical strength, suitable hardness and low-compression permanent deformation are kept. The preparation process of the material is compatible with traditional rubber processing, the process is stable and controllable, and the material is suitable for sealing parts under harsh working conditions such as carbon dioxide capture, utilization and storage and has a good industrial application prospect.

The application provides a kind of anti-freezing high-performance concrete for building 3D printing and a preparation method thereof, the concrete contains cement 80-100 parts by mass, fly ash 80-100 parts, slag powder 220-270 parts, silica fume 15-30 parts, fine aggregate 1200-1500 parts, and polycarboxylic acid high-performance water reducing agent, thickening agent, polypropylene fiber and / or modified cellulose ether, water-binder ratio 0.55~0.67, fine aggregate is natural sand, granite waste sand or mixture thereof, replacement rate 0%~100%. During preparation, accurate measurement, dry mixing, solution preparation, wet mixing fluidization, high-speed slurry, printing forming and moisture curing are carried out. The application adopts microstructure self-optimization active anti-freezing design, without coarse aggregate, which greatly reduces carbon emission, the anti-freezing grade of concrete reaches F125-F150, with excellent printability and mechanical properties, without printing head blockage problem, the preparation process is controllable, and is suitable for building 3D printing engineering in cold and seasonal freeze-thaw areas.

The application discloses a carbon fiber unmanned aerial vehicle part forming process and belongs to the unmanned aerial vehicle forming technical field, and comprises the following steps: taking a heated shrinkage polymer latex air bag matched with the shape of an unmanned aerial vehicle part as a mold core; carbon fiber prepreg is laid on the surface of the mold core through a multi-angle and multi-layer laying process to obtain a preformed part; the laying process comprises the following steps: sequentially laying a first carbon cloth layer, a second carbon cloth layer, a third carbon cloth layer, a fourth carbon cloth layer, a fifth carbon cloth layer and a sixth carbon cloth layer from inside to outside; the preformed part is formed by a hot press, and after the mold core is removed, a carbon fiber unmanned aerial vehicle part crude product is obtained; the carbon fiber unmanned aerial vehicle part crude product is polished and finished to obtain a carbon fiber unmanned aerial vehicle part finished product. The application realizes the stable laying of the multi-layer carbon cloth.

Abstract not available for ep3592497a1 – abstract of corresponding document: wo2018163017a1. The invention relates to a resistance spot welding process comprising the following successive steps: - providing at least two steel sheets having a thickness (th) between 0.5 and 3 mm, at least one of the sheets being a zinc- or zinc-alloy-coated steel sheet (a) having a tensile strength (ts) greater than 800 MPa and a total elongation (tel) such that (ts) x (tel) > 14000 MPa%, the composition of the steel substrate of (a) containing, by weight: 0.05% ≤ c ≤ 0.4%, 0.3% ≤ mn ≤ 8%, 0.010% ≤ al ≤ 3%, 0.010% ≤ si ≤ 2.09%, with 0.5% ≤ (si + al) ≤ 3.5%, 0.001% ≤ cr ≤ 1.0%, 0.001% ≤ mo ≤ 0.5% and possibly: 0.005% ≤ nb ≤ 0.1%, 0.005% ≤ v ≤ 0.2%, 0.005% ≤ ti ≤ 0.1%, 0.0003% ≤ b ≤ 0.005%, 0.001% ≤ ni ≤ 1.0%, the remainder being iron and unavoidable impurities,- to perform resistance spot welding of at least two steel sheets to produce a weld with an indentation depth (idepth) on the surface of said steel sheet (a) such that: 100 µm ≤ (idepth) ≤ 18.68 (znsol)- 55.1, (idepth) being in micrometers and znsol being the solubility of zn in the steel of sheet (a) at 750 °c, in % by weight.

The present application relates to the field of prefabricated concrete pile production, and specifically discloses a preparation method of a centrifugal reinforced prestressed solid square pile, comprising: mold pretreatment and cage reinforcement assembly, primary high-strength concrete distribution, mold closing and prestress tensioning, five-stage gradient centrifugal forming, residual slurry and impurity discharge, pile core high-strength concrete grouting and densification, and high-pressure steam curing. The present application uses gradient centrifugation to compact the outer layer of the pile body concrete layer by layer and uniformly arrange the aggregate, eliminates the soft interlayer of the pile core by discharging the residual slurry, and then fills the internal voids by secondary grouting of the pile core and low-speed centrifugal compaction, forming a full-face homogeneous structure with dense outer layer and high-strength core. Finally, the high-pressure steam curing strengthens the overall performance. The present application effectively solves the technical defects of uneven cross-section density and high core porosity caused by the traditional vibration process, significantly improves the compressive strength, bending performance and structural stability of the pile body, and is suitable for industrialized mass production.