35results about How to "Good "leveling" effect" patented technology

The invention relates to a degreasing agent used for dyeing in one bath and with multiple functions. The degreasing agent is characterized by being composed of the following ingredients by mass percent: 5-20% of fatty alcohol polyoxyethylene ether, 5-20% of modified fatty amine polyoxyethylene ether, 2-10% of a dispersing agent, 5-10% of a solvent, 0.3-1% of polyether modified silyl ether ester and the balance of water. The degreasing agent used for dyeing in one bath and with multiple functions is easy in application and simplified in operation, and only one auxiliary is added. In the aspectof effect, dye dispersing and uniform dyeing effects are better during textile dyeing; besides, the degreasing agent has low foaming property and is easy to clean, degreasing is thorough during one-bath process dyeing of multiple fiber fabrics, removed grease stains are dispersed in dye liquor and can not touch a cloth cover and the inner wall of a dye vat, so that the problems of color tone, color spot, nonuniform dyeing and the like can be effectively avoided, deposition of cation and anion dyes also can be avoided, time, electricity and water are saved at the same time, energy conservationand emission reduction are realized, and economic benefit is effectively improved, so that energy-saving and environmental requirements can be better met.

The invention relates to the field of related technologies of cement pouring and particularly relates to a pressing and leveling device applied to cement pouring. The pressing and leveling device comprises movable bearing blocks and a pressing roller, wherein two movable bearing blocks are symmetrically arranged; the pressing roller is arranged between the two movable bearing blocks; a collectiontank is also arranged between the two movable bearing blocks; the front end of the collection tank is hinged with a movable plate; two ends of the movable plate are in sliding connection with an arc-shaped movable groove in the side wall of the collection tank; when the movable plate slides in the arc-shaped movable groove, an included angle between the movable plate and a horizontal plane is 10-70 degrees; when the current cement admixture is thick, the movable plate rotates upwards under the action of resistance; after the movable plate rotates to 70 degrees, the cement admixture is pushed forwards, so that part of the cement admixture is collected; when the current cement admixture has a low-lying position, the movable plate losses the resistance and rotates downwards; meanwhile, the part of the cement admixture flows out through the movable plate and is filled in the low-lying position; and the leveling effect is good.

The invention relates to a production line for environmentally-friendly foam brick manufacturing and processing. The production line comprises a processing bottom plate, electric sliding rails, a flattening device and a cutting device. The top of the processing bottom plate is symmetrically provided with the electric sliding rails, the leveling device is installed at the top of the left end of theprocessing bottom plate, and the cutting device is mounted on the top of the right end of the processing bottom plate; the flattening device includes a mounting bracket, a first flattening plate, a secondary flattening plate, a U-shaped connecting base, a positioning slide column, a slide column spring, a cleaning branch chain and a pressing mechanism; and the cutting device comprises a cutting bracket, a cutting push rod, a moving bracket, a supporting mechanism, a cutting saw, a rotating motor, a rotating disc and a transmission rod. The production line can solve the problems that when existing foam bricks are flattened and cut, manual foam brick flattening is needed, the foam brick flattening effect is poor, the foam brick scrapping effect is poor, the foam brick chipping cleaning is difficult, limiting cannot be achieved when the foam bricks are cut, and movement is caused when the foam bricks are cut.

The invention discloses a high-efficiency textile printing and dyeing auxiliary, which is prepared from the following raw materials in parts by weight: 6 to 11 parts of hydroxyethyl cellulose, 5 to 10 parts of methylene naphthyldisulfnate, 2 to 8 parts of 1.4-butylene terephthalate glycol, 2.5 to 6 parts of triethylamine, 7 to 9 parts of triethoxysilane aminoethyl aminopropyl, 4 to 10 parts of sodium dodecylbenzene sulfonate, 1.5 to 6 parts of amino-modified silicone oil, 6 to 11 parts of poly(dimethyldiallylammonium chloride), 2.5 to 6 parts of potassium borate, 1.5 to 4 parts of ethylenediamine tetramethylene phosphonic acid hexapotassium salt, 1.5 to 4 parts of sodium 4-(2-octanoyloxy ethoxy carbonyloxy) benezensulfonate, 1.2 to 4 parts of ferrous sulfate and 2.5 to 7 parts of stearic acid. The textile printing and dyeing auxiliary has the beneficial effects that a uniform dyeing effect can be well achieved, a dye can be coagulated, and in addition, the textile printing and dyeing auxiliary has good permeation and retarding effects.

The invention belongs to the technical field of aerosol measurement, and particularly relates to a measurement device for measuring aerosol parameters by a lateral laser radar. The measurement device comprises a base; the upper side of the base is provided with a horizontal rotation mechanism; the upper side of the horizontal rotation mechanism is provided with a pitch mechanism; the upper side of the pitch mechanism is fixedly provided with a CCD lateral laser radar mechanism; the CCD lateral laser radar mechanism comprises a CCD camera and a laser radar for transmitting laser beams; the CCD camera is arranged at the upper side of the laser radar; and the medial axis of the CCD camera lens is parallel with the direction of the laser beams transmitted by the laser radar. In the case of work, the laser radar and the CCD camera rotate synchronously in the horizontal direction through the horizontal rotation mechanism, the laser radar and the CCD camera rotate synchronously in the vertical direction through the pitch mechanism, and actions of a transmitting device and a receiving device in the CCD imaging lateral laser radar can be ensured to be kept consistent.

The invention discloses a high temperature dye leveler for polyester fibers, which is composed of the following raw materials in parts by weight: 1 to 2 parts of polyglycerol monostearate, 0.2 part of zinc acetate, 1 part of dodecyl trimethyl ammonium chloride, 80 parts of dye leveler, 0.1 part of magnesium acetate, 12 parts of polyamide, 0.3 part of calcium acetate, 5 parts of polyethylene glycol, 0.2 part of tin acetate, 4.5 parts of glycol, 3 parts of dimethyl terephthalate, and 1 part of carboxyl propyl methyl cellulose. The high temperature dye leveler is used for polyester fibers, enables the fabric made of the dyed polyester fibers to have a more uniform and brighter color and luster, has a very good dye leveling effect, and moreover can improve the fluffy and soft touch-feel, anti static performance, smoothness, and hydrophilicity of polyester fibers.

The present invention relates to a method for dyeing cloth and its equipment. It is characterized by that the cloth can be winded on the cloth-rolling shaft, said cloth-rolling shaft is a hollow shaft whose external wall is equipped with uniformly and densely distributed small holes, then two sides of cloth roll can be sealed by using sealing material, one end of shaft hole is closed, and the dyesolution can be pumped into another end of the shaft hole, and then the dye solution in the dyeing vessel can be penetrated into and through the rolled cloth by means of small holes uniformly and densely distributed on its external wall, and the dye solution can be back flowed into dyeing vessel.

The invention relates to an automatic adhered-carton flattening device and an application of the same. The automatic adhered-carton flattening device comprises a servo conveying belt, a box and top pressure surface pushing mechanism, a box-shaped mold, four side-face pressing mechanisms, a carton ejection mechanism, a photoelectric sensor and a controller. The servo conveying belt, the box and top pressure surface pushing mechanism, the side-face pressing mechanism, the carton ejection mechanism and the photoelectric sensor are in linkage connection with the controller, the photoelectric sensor is arranged on the side face of the servo conveying belt, the box and top pressure surface pushing mechanism is arranged on one side of the servo conveying belt, the box-shaped mold and the box ejection mechanism are sequentially arranged on the other side of the servo conveying belt, the box and top pressure surface pushing mechanism, the box-shaped mold and the carton ejection mechanism form a linear array, and the side-face pressing mechanisms are respectively arranged on up, down, left and right sides of the box-shaped mold. Compared with the prior art, the automatic adhered-carton flattening device has the advantages of automatic operation, good flattening effect, rapid motion, high efficiency and stable operation.

The invention provides a multifunctional fixture for machine manufacture. A fixture device is arranged on the top of a spring. A manufacture device is connected to and arranged at the left side of a magnet. An operation structure is arranged above the magnet through electrical connection, and the magnet is arranged at the bottom of the operation structure. Driving bearings are respectively arranged at the two ends of a conveyor belt, and the conveyor belt is arranged at the connection position of the driving bearings. A bottom board is arranged on mobile wheels, and the mobile wheels are arranged under the bottom board. Through arrangement of the manufacture device, the fixture device and the operation structure, the multifunctional fixture is convenient and practical, simple to operate, anti-slip, safe and reliable, flexible in fixation, higher in degree of intelligence, and safe and reliable, the work effect is improved, and the functional diversity is improved.

The invention discloses a paster. A body of which one surface is printed with a pattern layer and the other surface is printed with a smooth layer is taken as a main body of the paster, and the surface of the smooth layer is directly applied with an upper glue layer to ensure that strippable paper with a concavo-convex layer on one surface forms the attachment with a body of the upper glue layer; and when the strippable paper is torn out, the surface of the upper glue layer forms a convexo-concave layer with a plurality of air ducts through the attachment of the concavo-convex layer of the strippable paper to ensure that the air is discharged through the air ducts in the flat pasting process to make the flat pasting leveling effect of the paster better.

The invention relates to a silicon steel column hydraulic high-efficiency correction leveling assembly, which belongs to the technical field of silicon steel column processing, and aims to provide a silicon steel column hydraulic high-efficiency correction leveling assembly with good correction effect and high correction efficiency. It includes a square frame body, the inner bottom surface of the square frame body is provided with a first splint and a second splint, and a silicon steel column correction and leveling channel with adjustable spacing is formed between the first splint and the second splint; The inner bottom surface of the square frame is provided with a horizontal correction device for horizontal correction and leveling of the silicon steel column, and the inner top surface of the square frame is provided with a vertical correction device for vertical correction and leveling of the silicon steel column The level correction device includes a hydraulic cylinder, the end of the drive shaft of the hydraulic cylinder is connected with a push mechanism, and the push mechanism is connected with the first splint or the second splint so that the second splint can slide horizontally relative to the first splint. The invention is suitable for correction and leveling of silicon steel columns.

A textile leveling aid is prepared from raw materials in parts by weight as follows: 6-11 parts of polyvinylpyrrolidone, 5-8 parts of isopropanol, 7-9 parts of ammonium dodecylbenzene sulfonate, 4-6 parts of ethylene glycol adipate, 6-10 parts of dicyclohexylmethane diisocyanate, 2-6 parts of a cross-linking agent, 3-8 parts of polyacrylamide, 1-5 parts of tetraacetylethylenediamine, 4-9 parts of sodium hydroxide, 6-11 parts of diglycol laurate, 4-10 parts of polyethylene amide, 2.5-8 parts of dimethyl siloxane, 0.2-1 part of acetone and 2-4 parts of a dispersing agent. The textile leveling aid has the benefits as follows: the textile leveling aid can have the very good leveling effect, prevents dye coagulation and has good temperature stability.

The invention relates to a design method of an X-ray flattening filter. A traditional design method of the flattening filter has the defects of being long in time consumed, high in cost and poor in flattening effect. The design of the multi-stage conical flattening filter is realized through the Monte Carlo method, a data fitting method and the like. The design method can realize a good flattening effect, and the whole process is clean and easy to realize. Meanwhile, the design cost is low and the design period is short.

The invention relates to an efficient straightening and leveling assembly applied to a silicon steel column and belongs to the technical field of silicon steel column machining. The efficient straightening and leveling assembly applied to the silicon steel column aims at achieving the effect that the straightening and leveling effect is better. The efficient straightening and leveling assembly comprises a square frame body. A horizontal straightening device is arranged on the inner bottom face of the square frame body, wherein the horizontal straightening device is used for conducting horizontal straightening and leveling on the silicon steel column. A vertical straightening device is arranged on the inner top face of the square frame body, wherein the vertical straightening device is used for conducting vertical straightening and leveling on the silicon steel column. The vertical straightening device comprises a top connection plate and a bottom straightening plate, wherein the top connection plate is fixedly connected to the inner top face of the square frame body, and the bottom straightening plate is used for vertically compressing the silicon steel column for conducting vertical straightening and leveling. An extending-and-contracting frame is arranged between the top connection plate and the bottom straightening plate. Hydraulic cylinders are arranged in the extending-and-contracting frame, wherein the hydraulic cylinders are used for extending and contracting the extending-and-contracting frame. The efficient straightening and leveling assembly is stable in clamping; the silicon steel column is stressed uniformly in the straightening and leveling process and can obtain full support after bearing the pressure; secondary deformation cannot be generated entirely; and the straightening and leveling effect is good.

The invention discloses a rapidly-cured powder coating for coiled materials. The powder coating contains the following components: by weight, 50-60 parts of hydroxyl resin, 11-14 parts of a curing agent, 1 part of a leveling agent, 1 part of a deblocking agent, 0.4 part of an antifoaming agent and 23.6-36.6 parts of pigment and filler. According to the invention, isocyanate, organo tin and ammonia react with hydroxyl resin with low softening point to obtain the powder coating, wherein organo tin and the deblocking agent of ammonia can be used to reduce deblocking temperature of the closed isocyanate and raise curing speed. As there is no increasing in molecular weight before reaching the deblocking temperature, an excellent leveling effect can be achieved. The powder coating has comprehensive effects as follows: curing speed is raised and the curing time is reduced to 3min from original 30min; baking time is minimized; energy is saved; production cycle is shortened; production cost is reduced; and production efficiency is raised.

The invention discloses an interior wall paint glazing agent capable of generating glittering effect. The glazing agent uses polyacrylate dispersion as a film-forming substance and is prepared by adding large particle size mica slice as a functional filling material, silica delustering agent as a functional auxiliary agent, polyvinyl alcohol aqueous solution with low degree of polymerization as a levelling agent and dispersing agent into a common glazing agent containing film forming auxiliary agent, mildew inhibitor, antifoaming agent, antifreezing agent and water, etc. A formula of the glazing agent comprises (wt%) 15.0-40.0 parts of water, 25.0-60.0 parts of polyacrylate emulsion, 1.0-2.5 parts of powdered mica slice, 0.2-1.5 parts of delustering agent, 8.0-20.0 parts of polyving akohol aqueous solution, 1.0-2.5 parts of film-forming auxiliary agent, 0.05-0.2 part of mildew inhibitor, 0.05-0.2 part of antifoaming agent and 0.5-1.6 parts of antifreezing agent.

The invention discloses a land plowing and preparation device for sweet potato planting. The land plowing and preparation device comprises a vehicle frame, a rotary tillage unit and a leveling unit, wherein the rotary tillage unit and the leveling unit are mounted on the vehicle frame; the rotary tillage unit comprises rotary tillage assemblies, a first rotating disc, a first connecting rod and a mounting rod; the leveling unit comprises a second motor, a second rotating disc, a movable rod, a pressing rod and a leveling plate; and a soil crushing unit is arranged between the rotary tillage unit and the leveling unit, and the soil crushing unit comprises a hollow shaft, a driving mechanism for driving the hollow shaft to rotate, a fourth rotating disc, a third rotating disc, a second connecting rod, a supporting rod and a crushing blade. The rotary tillage unit is arranged, so that the working efficiency is improved while the rotary tillage assemblies are effectively protected; the rotary tillage depths of the three groups of rotary tillage assemblies are synchronously adjusted to meet different working requirements; the leveling unit is arranged, soil is flattened and trowelled, and a better leveling effect is achieved; and the soil crushing unit is arranged, a movable block drives a driving rod to reciprocate, the movement range of the supporting rod is further expanded, and the soil crushing efficiency is improved.

The invention provides a drawing leveling dead space accurate measurement system and measurement method. Mutation fluctuations of input cotton slivers are made and then thickness data of the output cotton slivers is recorded, so that an accurate value of a dead space is determined by viewing a thickness waveform. According to the drawing leveling dead space accurate measurement system and measurement method, a length of the dead space can be conveniently and efficiently determined, and the best leveling effect can be achieved under the same technical conditions. Quality of the cotton slivers is improved.

The invention relates to a multifunctional degreasing agent for one-bath dyeing. The multifunctional degreasing agent is characterized by comprising the following components of fatty alcohol-polyoxyethylene ether, modified fatty amine polyoxyethylene ether, glyceryl ether oleate, fatty alcohol-polyoxyethylene ether, iso-tridecanol polyoxyethylene ether, phenol ether ammonium sulfate, polyether modified silyl ether ester, ethylene glycol monobutyl ether or diethylene glycol monobutyl ether and water. The multifunctional degreasing agent for one-bath dyeing is convenient to apply and simple to operate, and only one auxiliary agent is added. In the aspect of effect, the multifunctional degreasing agent has relatively good disperse dye and level dyeing effects during fabric dyeing, also has low-foaming property, is easy to clean, and can remove oil cleanly when used for dyeing multi-fiber fabrics by a one-bath method, and the removed oil stain is dispersed in dye liquor and does not stickto the cloth surface and the inner wall of a dye vat, therefore, the problems of dyeing defects, color spots, uneven dyeing and the like can be effectively avoided, and the energy-saving and environment-friendly requirements are met.

The invention relates to a method for leveling side-wall welding deformation of an urban rail vehicle, comprising the steps of: adopting a gas metal arc welding machine, determining the positions of weld joints, cleaning and polishing areas to be welded, grooving, welding, carrying out welding operation and cold working simultaneously, measuring, grinding and checking the weld joints, wherein thegroove is V-shaped, the depth of the groove is 2/3 of the penetration depth, and a V-shaped groove included angle is 35-65 degrees; and when a welding operator carries out welding operation, the coldworker uses a flat ruler to measure the deformation condition of side walls in the process of welding. In the method, the equipment is simple, safe and reliable, the operation is simple and convenient, the production efficiency is high, the production cost is saved, the economic benefit is high, and the comprehensive cost is reduced by 50% as compared with that of the flame leveling.

The invention discloses a dyeing method for improving the dyeing performance of polyimide fibers. The method comprises the steps of pretreatment liquid preparation, fiber pretreatment, fiber dyeing and fiber color fixation. According to the dyeing method provided by the invention, the dyeing performance of the polyimide fibers can be effectively improved, the fiber dye uptake, the fixation rate and the K/S value of the fabric are remarkably improved, and the wet color fastness and the rubbing color fastness of the fabric are improved. The process disclosed by the invention is simple in steps, high in dyeing efficiency, capable of remarkably reducing the use amount of cationic dyes and reducing environmental pollution, green and friendly; the adopted chemical pretreatment process is simple and efficient, and the dyeing performance of the polyimide fibers can be remarkably improved; and the cationic dyes are bright in color and not prone to fading, and the efficient and lasting dyeing effect can be achieved. According to the dyeing method for improving the dyeing performance of the polyimide fibers provided by the invention, on the basis that simple and efficient chemical pretreatment is carried out on the polyimide fibers, the dyeing performance of the polyimide fibers is enhanced, the dyeing efficiency of the dyeing process is further improved, the influence on the mechanical performance of the fibers is small, the environmental friendliness is improved, and wide application of the polyimide fibers and fabrics in the field of clothing can be promoted.

The invention discloses a roll paper leveling mechanism, comprising a rack, an anti-warping device, and a conveying device; the leveling mechanism is characterized by further comprising a humidifier for humidifying paper, and a dehumidifier for use in cooperation with the humidifier, and the anti-warping device is arranged between the humidifier and the dehumidifier. The roll paper leveling mechanism humidifies and softens greatly curled roll paper, and the softened roll paper may be quickly leveled by the anti-warping device; the roll paper is wet and soft and thus may not be damaged in the leveling process, and a better leveling effect can be achieved; furthermore, the roll paper, after being leveled, is dehumidified by the dehumidifier to keep flat.

The invention discloses a beating device, comprising a support plate (1), a beating head (2), a cross bar (3) and an installation box (4). The beating head (2) is located on the front of the support plate (1). Above, the beating head (2) is fixed on the end of the cross bar (3); the support plate (1) and the cross bar (3) are horizontally fixed on the installation box (4). Through the above-mentioned structure, the beating head can move back and forth continuously up and down, the shoe leather is placed on the support plate, and the leather surface is beaten flat by the beating head, which improves the efficiency.

The invention provides a coating composition for medical instruments. The coating composition is characterized by comprising the following components in parts by weight: 19-32 parts of polyvinyl acetate, 8-17 parts of ethylene-vinyl acetate latex, 7-18 parts of polyhexamethylene guanidine gluconate, 5-11 parts of azodiisobutyronitrile, 13-29 parts of polyvinyl alcohol, 7-12 parts of a dispersing agent, 5-9 parts of a thickening agent, 31-38 parts of a wood frog antibacterial peptide, 4-7 parts of a defoaming agent, 1-3 parts of a pH regulator, 42-59 parts of ferroferric oxide hollow magnetic nano microspheres, 31-47 parts of titanium silicon carbide ceramic powder and 17-26 parts of distilled water. The coating composition disclosed by the invention has excellent antibacterial capability and very good surface adhesion performance, and is suitable for being popularized and used in a large scale.

The invention discloses light plastering gypsum taking diatomite waste particles as aggregate and a preparation method thereof, and belongs to the technical field of building materials. The diatomitewaste particles used in the invention have the advantages of simple processing process and low processing cost. And when the diatomite waste is treated, the consumption of sand, vitrified micro bubbles and perlite is reduced. Solid waste is utilized, so that the material cost is reduced while environmental friendliness and energy conservation are achieved. The diatomite waste particles used in theinvention have the advantages of light weight, porous micropore structure, air permeability, strong adsorbability and uniform granularity, and the surface of the particles has hydrophobicity after being fully treated by the organosilicon treatment liquid. The plastering gypsum is used as aggregate to be added into light plastering gypsum, is applied to plastering of interior walls, reduces bearing of buildings, adsorbs toxic and harmful gas such as formaldehyde and VOC, purifies air, adjusts indoor temperature and humidity, is breathable, waterproof, mildew-proof and bacteriostatic, has highadhesion to the walls, has excellent leveling effect, is green, energy-saving, healthy and environment-friendly, and has high cost performance, low volume density and high coating rate.

The invention discloses a slicing device for laboratory biological research, and relates to the field of laboratory biological slicing. The slicing device comprises a base, a sample fixing frame movably connected to the middle of the upper portion of the base, a cold air generating device arranged on one side of the upper portion of the base, a cold air conveying device arranged in the base and on the sample fixing frame, and a flattening device movably arranged on the side, away from the cold air generating device, of the base. The cold air conveying device comprises an air guide ring fixedly installed on the outer side face of the open end of the sample fixing frame and an air guide pipe communicating the air guide ring and the cold air generating device, one end of the air guide pipe is fixedly connected to the side face of the air guide ring, and the other end of the air guide pipe is fixedly connected to the air outlet end above the cold air generating device; an annular groove is formed in the inner side of the opening of the sample fixing frame; According to the slicing device, cold air is utilized more sufficiently, the sample cooling effect is better, sample slices cannot form rolled slices, meanwhile, wrinkles cannot occur, and the good flattening effect on the sample slices is achieved.

The invention discloses a paddy field leveler for a multifunctional farm machine. The paddy field leveler comprises a leveler body (1), wherein a plurality of blades (2) are arranged on the leveler body (1) in a protruding manner, fixing shaft holes (3) are formed in the two sides of the leveler body (1), and mounting holes (4) are formed in outer sides of the fixing shaft holes. The paddy field leveler provided by the invention has the advantages that the levelling effect is good, the probability of soil adhesion is low, the paddy field leveler is firm and reliable, the structure is simple, and the cost is low.

The invention relates to the field of suspended ceilings, in particular to a nail-free module suspended ceiling. The nail-free module suspended ceiling comprises gypsum boards, cladding keels and sidekeels; the gypsum boards are fixed to the lower ends of the cladding keels; and one ends of the cladding keels are fixedly connected with the side keels. The nail-free module suspended ceiling is characterized in that the nail-free module suspended ceiling further comprises fixing rods and leveling assemblies; the upper ends of the leveling assemblies are fixedly connected with the fixing rods; the lower ends of the leveling assemblies are fixedly connected with the cladding keels; each leveling assembly comprises a clamping piece and a screwing piece; each clamping piece comprises a guide plate, a connecting plate, a horizontal plate and vertical clamping teeth which are sequentially and integrally connected; the screwing pieces comprise fixing rings; the fixing rings are provided with lead screws; and the lead screws are provided with nuts. Through special structural design, the mounting is rapid and the leveling effect is good; since the leveling assemblies are directly clamped with and fixed to the cladding keels, the leveling can be adjusted horizontally simply with the nuts, without self-tapping nails for fixing and leveling; and the ail-free module suspended ceiling is convenient to operate and high in practicability, and is suitable for wide popularization.

The invention relates to an auto-leveling method based on stable motion states of fibers in a drafting zone, the fibers in the drafting zone are divided into rear fibers, slow floating fibers, fast floating fibers and front fibers, and the distribution of the rear fibers in the drafting zone is obtained through statistics of a discrete drafting model. Supposing that the speed of slow floating fibers in the discrete drafting model is consistent with the speed of the rear roller all the time, the auto-leveling method comprises the steps that the speed of the rear roller is adjusted to be V2 (t) at the moment of T1 (t), and the speed of the rear roller is adjusted to be the original speed at the moment of T2 (t). According to the invention, when input uneven fibers move in a slow floating fiber state, the speed of the rear roller is adjusted to stabilize the motion states of various fibers in the drafting area, and the influence of the fluctuation of the number of input fibers on the stability of the motion states of the fibers in the drafting area is eliminated. And the optimal speed change starting time and the optimal speed change ending time of the rear roller are calculated by using the input non-uniform length, so that the fibers of the non-uniform part can be leveled, and the fibers of other parts cannot be influenced.