407results about How to "Prevent thinning" patented technology

The invention discloses a method for preparing a bimetal composite plate by stirring friction braze welding. The method comprises that: a plate with small hardness is used as a covering layer metal plate; a plate with high hardness is used as a base layer metal plate; the covering layer metal plate and the base layer metal plate are horizontally fixed on a working platform surface in a lap joint mode; solders which can generate eutectic reaction with one of the upper/base layer metal plates are preset between the upper/base layer metal plates; a non-needle type cylinder friction device is arranged over the covering layer metal plate; the non-needle type cylindrical friction device is made to rotate and be pressed to be closely contacted with the surface layer of the covering layer metal plate, but not penetrate the covering layer metal plate, and the non-needle type cylindrical friction device rotates in the original position or moves forward along the surface of the covering layer metal plate while rotating; by utilizing frictional heat to melt the solders, the upper/base layer metal plates are both quickly melted in the solders, thereby achieving excellent interface combination; and the excessive solders are squeezed out, and a thin and dense soldering seam is formed, so that the bimetal composite plate is prepared. Compared with the braze welding in a furnace, the method has the advantages of high efficiency, energy conservation, pressure lead-in, unnecessary soldering flux and gas protection and short holding time at a high temperature.

The invention relates to energy-saving leveling putty powder, which is characterized by being prepared from the following raw materials in percentage by weight: 20 to 30 percent of white cement, 5 to 10 percent of gray calcium powder, 40 to 60 percent of heavy calcium carbonate powder, 5 to 15 percent of 50 to 100-mesh light sand, 0.1 to 1 percent of reinforcing fiber, 0.1 to 1.5 percent of polyvinyl alcohol, 0.1 to 1.8 percent of cellulose and 1 to 3 percent of polymer powder, wherein the light sand is polyphenyl particles, vitrified micro bubbles or expanded perlite; the reinforcing fiber is 2-mm polypropylene fiber; and the cellulose is carboxymethyl cellulose. The energy-saving leveling putty powder has the characteristics of high strength, high water resistance, no toxicity or odor, yellowing resistance and the like; moreover, by adding the light sand with heat preservation and thermal insulation function, the putty powder has the obvious characteristics of light weight, heat preservation, high thermal insulation, abrasion resistance, corrosion resistance, high electric insulating performance, radiation protection and the like, while the basic performance is ensured.

Split-gate memory cells and fabrication methods thereof. A split-gate memory cell comprises a plurality of isolation regions formed on a semiconductor substrate along a first direction, between two adjacent isolation regions defining an active region having a pair of drains and a source region. A top level of the active regions is lower than a top level of the isolation regions. A pair of floating gates is disposed on the active regions and aligned with the isolation regions, wherein a passivation layer is disposed on the floating gate to prevent thinning from CMP. A pair of control gates is self-aligned with the floating gates and disposed on the floating gates along a second direction. A source line is disposed between the pair of control gates along the second direction. A pair of select gates is disposed on the outer sidewalls of the pair of control gates along the second direction.

The invention provides an MOF (metal-organic framework) separating layer film and a preparation method thereof. The preparation method comprises the following steps: a surface modification layer is formed on the surface of a base film through an interfacial polymerization reaction; an MOF separating layer grows secondarily on the surface modification layer, and preparation of the MOF separating layer film is completed. A preparation method of a positively charged MOF separating layer film further comprises the step that acid radical ions in the MOF separating layer film are removed by soaking the prepared MOF separating layer film in methyl alcohol. The MOF separating layer grows secondarily on the surface modification layer, and by means of the pore diameter screening action and a frame charging effect, the MOF separating layer film can effectively realize the effect of selective ion separation; layers of the MOF separating layer film are not formed through simple physical bonding, and accordingly, the defect of separation is overcome.

The invention discloses a die assembly of metal plate deep-drawing cup shells and shaping process. The invention comprises an upper die holder and a lower die holder, wherein a punch and a cavity die which are mutually corresponded are respectively arranged on the upper die holder and the lower die holder, a discharging screw which is connected with the upper die holder and a flanging spring which is sleeved on the discharging screw are arranged on the outer side of the punch, a blank holder is arranged on the lower end of the discharging screw, a holding frame which is fixedly connected with the lower die holder is arranged on the outer side of the cavity die, a conical pushing block and a rubber pad are arranged in turn in the holding frame from top to bottom, a conical enclasping element which is matched with the punch is arranged in the conical pushing block, a spring holder is arranged on the lower end of the lower die holder, a material squeezing spring is arranged in the spring holder, and a push rod which is extended through the rubber pat, the conical pushing block, and a conical clamping element is arranged on the upper end of the material squeezing spring. The invention carries out enclasping along the side-wall direction during the deep-drawing process of cup shells, material flowing tendency can be changed flexibly and actively, which enables wall thickness to be changed evenly, maximum thinning-out quantity on a dangerous cross portion during the process for drawing can be minimized and drawing breakage can be avoided.

The invention relates to a filler wire static shaft shoulder friction stir welding and additive manufacturing device and method. The filler wire static shaft shoulder friction stir welding and additive manufacturing device comprises a stirring head, the periphery of the stirring head is sleeved with a static shaft shoulder, the stirring head and the static shaft shoulder are configured to synchronously move along a machining track, and the stirring head can rotate around the axis of the stirring head. A threaded groove is formed in the peripheral face of the machining end of the stirring head, the static shaft shoulder is provided with a wire feeding hole, and the wire feeding hole is used for feeding wires to the space between the part, provided with the threaded groove, of the stirring head and the hole face of a through hole formed in the static shaft shoulder. When the device is used for additive manufacturing, the interface bonding defects are avoided, and the bonding strength is guaranteed. And the mechanical property of additive manufacturing parts is greatly improved.

The invention relates to latex paint finishing coat and a preparation method thereof, and in particular relates to a thinning-free one-time brush-molded latex paint finishing coat and a preparation method thereof, belonging to the field of coatings for architectural decoration. The latex paint finishing coat is prepared from the following raw materials in parts by weight: 20-29 parts of water, 1-2 parts of a glycol anti-freezing agent, 0.1-0.2 part of cellulose, 0.05-0.2 part of bentonite, 0.7-1 part of a dispersing agent, 0.1-0.2 part of a wetting agent, 0.2-0.6 part of a mineral oil anti-foaming agent, 0.1-0.2 part of an alkaline pH regulator, 15-22 parts of titanium dioxide, 8-10 parts of calcined kaolin, 0-5 parts of flash-burned kaolin, 15-25 parts of pigment/filler, 0.2-0.5 part of mildew preventive, 15-20 parts of emulsion, 1-2 parts of a coalescing agent, 0.1-0.5 part of antiseptic, 0.1-0.3 part of a thickening agent 1 and 1-2 parts of a thickening agent 2.

The present invention is sealed hot pressing technological process of producing no-glue fiber board with wood, bamboo or herbaceous plant as material, and solves the technological problems of lowering hot press pressure and expanding the product thickness and density range. The technological process includes the steps of: separating the material into wet fiber and applying paraffin emulsion; drying and spreading; pre-pressing; sealed and heated pressing the board blank inside sealing frame in a hot press to form the no-glue fiber board. The hot pressing step consists of hydrolysis section, air exhausting section and plasticizing section, and the sealing frame is heat resistant and airtight and in the shape of formed board.

The invention discloses an integral spinning forming method of a silicone oil damper housing of a crankshaft. The method comprises the following steps: a, blanking; b, punching a center hole; c, performing shovel spinning to increase the thickness, wherein a first shovel spinning wheel and a second shovel spinning wheel on a numerically controlled spinning machine are synchronously operated to perform shovel spinning on a circular board so as to form an inner barrel on the circular board; d, performing stretching and spinning to obtain an outer barrel, namely, flanging the circular board through a flanging wheel on the numerically controlled spinning machine, and performing spinning through a spinning flattening wheel, so as to form the outer barrel on the circular board, wherein the outer barrel is concentric with the inner barrel; e, performing spinning to obtain teeth; and f, machining. The integral spinning forming method of the silicone oil damper housing of the crankshaft is high in adaptability; the silicone oil damper housing, manufactured by the method, of the crankshaft, is high in sealing performance, easy in quality control, and long in service life; meanwhile, a good spinning die design scheme and a good forming scheme are provided for other shovel spinning parts, stretching and spinning flanging parts and double-barrel shaped parts with different sizes. Therefore, the method has a great guiding significance.

The invention relates to the technical field of foods, in particular to rice crust containing red tea and corn. The rice crust is prepared from the following raw materials in parts by weight: 30-50 parts of corn, 20-40 parts of wheat, 1-5 parts of salt, 1-3 parts of red tea powder, 5-8 parts of red tea leaves, 1-5 parts of chicken essence, 10-15 parts of edible oil, 50-80 parts of water and 0.01-0.03 part of sorbic acid. A preparation method for the rice crust comprises the following steps: (1) adding the red tea leaves into the water for boiling and soaking for 15-30 minutes, cooling, and filtering out the leaves to obtain a raw red tea solution; (2) putting the corn and the wheat into the raw solution obtained from the step (1) for soaking for 18-24 hours, taking out, adding the salt, the chicken essence and sorbic acid, and beating into paste for later use; (3) pressing the paste into slices by a mould, sprinkling the red tea powder outside the slices, frying in a pan of 160-180 DEG C by the edible oil for 5-10 minutes, and carrying out vacuum packaging by plastic bags. The rice crust is rich in tea fragrance, unique in taste, full in flavor and suitable for popularization and eating.

The invention discloses a preparation method of a sintering neodymium iron boron sheet magnet. The preparation method comprises the following steps of manufacturing a sintering neodymium iron boron blank into a sheet blank with thickness of 0.4 to 1.0mm by a mechanical processing technology; when grains at the surface layer of the sheet blank are damaged, cleaning and drying the surface of the sheet blank, packaging a black sheet by a metal bag or metal foil paper, putting into a vacuum sintering furnace, and performing heat treatment under a vacuum state; then, performing vibration, grinding and chamfering, and pickling surface activation. The preparation method has the advantages that excessive noble elements, such as cobalt, dysprosium and terbium, do not need to be added, so that the material cost of a component is hardly increased; the size critical point of the component thinning corresponding to the size fining of the grains is avoided; the cost is lower, the difficulty in technology manufacturing is little, and the degrading of anti-magnetic decay ability caused by damage to the surface grains is relieved.

The invention discloses a sweet corn beverage and a preparation method thereof. The sweet corn beverage is made from the following components in percentage by weight: 15-20% of sweet corn kernel, 2-5% of coconut extract, 5-10% of white granulated sugar, 0.5-1% of sodium caseinate, 0.05-0.1% of microcrystalline cellulose, 0.05-0.1% of gellan gum, 0.05-0.1% of carrageenan, 0..05-0.1% of xanthan gum, 0.03-0.1% of glycerin monostearate, 0.01-0.5% of baking soda and the balance of purified water. According to reasonable raw materials collocation, the product is balanced and comprehensive in nutrition. In the preparation process, the raw materials are not filtered, so that the raw materials are furthest utilized, and an ultrafine technology is used to ensure that the bast-containing grain raw materials have fine and smooth taste, rich nutrition and thicker concentration after being processed by a colloid mill, so that the sweet corn beverage is a natural, nutritive and healthy beverage.

The invention relates to a soaking sintering method based on layered composite heat supply. The soaking sintering method based on layered composite heat supply comprises the following steps that 1), proportioning is carried out on an iron-containing raw material, a flux, a solid fuel and water, and the proportioned sintering mixture is distributed onto a sintering machine trolley; 2) the sintering mixture distributed to the sintering machine trolley is ignited, and the fact of sintering the surface-layer sintering mixture in the sintering machine trolley is started; 3) high-temperature gas is injected to the material surface of the sintering mixture after ignition, and the high-temperature gas supplies heat to the middle-upper layer sintering mixture; (4) after heat preservation and heat supply, combustible gas is injected to the material surface of the sintering mixture, and the combustible gas is combusted in the material layer to supply heat to the middle-layer sintering mixture; and (5) after gas injection, steam is injected to the material surface of the sintering mixture, and the steam accumulates heat to supply heat to the lower-layer sintering mixture. By adopting the method, the problems of insufficient heat of an upper material layer and excessive heat of a lower material layer in traditional sintering can be effectively solved, and green soaking low-carbon sintering is realized.

This invention discloses a method for preparing pure aluminum ultrafine crystal thick film by DC magnetron sputtering. The method comprises: (1) selecting pure aluminum target, installing a substrate, and adjusting the distance between the target and the substrate; (2) evacuating, introducing Ar for 12-25 min, and pre-sputtering for 15-45 min; (3) sputtering for deposition under 0.6-0.8 Pa, Ar flow of 20-40 cm3/s, sputtering current of 0.8-1.6 A and sputtering voltage of 180-300 V; (4) stopping deposition for 10-30 min after sputtering for 5-15 min, and repeating the procedures until desirable thickness of the pure aluminum ultrafine crystal thick film is reached. The method can obtain pure aluminum ultrafine crystal thick film with a thickness above 2 mum. Besides, the thick film also has cuh advantages as good quality, high thickness and small granularity, and can be used as protective coating layer in such fields as surface engineering and microelectronics.

The invention relates to the technical field of packaging, and concretely discloses a processing technology for aluminum plastic packaging bags. The processing technology comprises the step I of unreeling, the step II of guiding, the step III of heat sealing, the step IV of dragging, and the step V of slitting, wherein, in the step I, two thin film rollers around which thin films are respectivelywound are taken, and the two thin film rollers are both rotatably connected onto a frame of a processing device for the aluminum plastic packaging bags, and in the step II, the frame is connected withtwo guiding units symmetrically arranged; each thin film roller corresponds to one guiding unit; the two guide units each comprise two guiding plates; and after being pulled out from the thin film roller, a thin film around each thin film roller enters a position between the two guiding plates of the corresponding guiding unit through a corresponding guiding roller. According to the scheme, the processing technology is used for solving the problems that the quality of the aluminum plastic packaging bags is unstable and the rejection rate of the aluminum plastic packaging bags is high due to the fact that two layers of thin films are attached inaccurately in the edge sealing process of the aluminum plastic packaging bags in the prior art.

The invention provides toxin-free nail-care oil capable of repairing nails and a preparation method of the toxin-free nail-care oil. The toxin-free nail-care oil is prepared from the following substances: macadamia nut oil, synthetic silk oil, jojoba oil, olive oil, grape seed oil, rosehip seed oil, strawberry seed oil, meadowfoam seed oil, avocado oil, a rose flower extracting solution, honey, a1 percent sodium hyaluronate solution, glycerol, sodium carboxymethyl cellulose, sodium alginate, distilled water and ethyl 4-hydroxybenzoate. Compared with the prior art, the toxin-free nail-care oilprovided by the invention has stable properties, is moderate, has nourishing and moisture-keeping properties, has no toxin and no harms and is green and natural; the toxin-free nail-care oil can be used for improving a nail structure and nail strength and the elasticity and moisture-keeping degree of nail cuticles and remarkably improving the appearance of nails. Only if one thin layer of the nail-care oil is covered, the nails are bright as if the nails are manicured; meanwhile, the nail-care oil also can be used for nourishing and protecting the nails and protection layers are formed on thesurfaces of the nails to prevent the nails from being invaded by sunlight, so that the surfaces of the nails are smoother and tougher.

The invention discloses a manufacturing method of a silicon inversion epitaxial wafer. First, anti-epitaxial equipment specially used for the silicon inversion epitaxial wafer is designed and manufactured; the liquidoid doping technology of epitaxial layer is adopted; the epitaxial process conditions which are suitable for the silicon inversion epitaxial wafer is built. The liquidoid doping technology of the epitaxial layer is that PC13 is added into SiHCL3 and the mixture ratio is suitable for satisfying the resistivity of the epitaxial layer; one kilogram of SiHCL3 is added with 5ml of PC13. The suitable process conditions are that gaseous temperature is 1190 DEG C, gaseous flow is 20 liters per minute, growing temperature is 1180 DEG C and the growing speed is 5Mum per minute. The flatness of the surface of the epitaxial wafer and the lattice integrity of the epitaxial wafer are ensured while the doping concentration of the epitaxial wafer is ensured.

The invention provides a polyethylene foaming material preparation method and a polyethylene foaming material prepared by the preparation method. The preparation method comprises: (a) mixing a matrixresin and a processing aid to form a mixture; (b) extruding the mixture to form a molding billet; and (c) preheating the molding billet at a temperature of 110-150 DEG C for 10-30 min, carrying out cross-linking and foaming on the preheated molding billet at a temperature of 190-230 DEG C under a pressure of 0.05-0.2 MPa, and carrying out cooling shaping on the cross-linked and foamed molding billet at a temperature of 60-80 DEG C under a normal pressure to obtain the polyethylene foaming material, wherein the matrix resin comprises low-density polyethylene, and the processing aid comprises across-linking agent, a foaming agent, a nucleating agent and a surfactant. According to the invention, the preparation method is simple, convenient and easy to operate, the foaming stability of the polyethylene resin can be well controlled, and the polyethylene foaming material prepared by the method is high in foaming ratio, uniform in foam holes, high in size stability, and is suitable for preparing foaming products with high quality.

The invention discloses an elastic strip forming machine which comprises a one-time forming system, a feeding manipulator and an automatic centering system. The one-time forming system comprises an upper die, a lower die, an upper positioning column, a lower positioning column, a middle pushing arm, two lateral pushing arms and two limb pushing arms. The feeding manipulator comprises a grabbing mechanism, a telescoping mechanism, a rotating mechanism and a transverse moving mechanism. The automatic centering system comprises an upper connecting rod, a lower connecting rod, a rotating mechanism, a left material blocking plate, a right material blocking plate and a drive mechanism. The elastic strip forming machine has the advantages of achieving one-time forming production of elastic strips and improving the production efficiency of the elastic strips and the pass percent of products.