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1797 results about "Air knife" patented technology

An air knife is a tool used to blow off liquid or debris from products as they travel on conveyors. Air knives are normally used in manufacturing or as the first step in a recursive recycling process to separate lighter or smaller particles from other components for use in later or subsequent steps, post manufacturing parts drying and conveyor cleaning, part of component cleaning. The knife consists of a high-intensity, uniform sheet of laminar airflow sometimes known as streamline flow.

Method for controlling alloyed hot dip galvanizing steel plate coating phase structure and alloyed hot dip galvanizing steel plate

The invention provides a method for controlling alloyed hot-dip galvanized cladding, in particular hot-dip galvanized steel sheet cladding phase structure. The method comprises the following steps: at least a set of strip steel which is provided with a steel stabilizing device and can stably control hot-dip galvanization process parameters and air knife parameters to obtain even thickness of the cladding is arranged between an air knife and a top roller; an inclined alloyed cladding heat treatment annealing curve with even temperature sections from high temperature to low temperature is selected and the strip steel is evenly alloyed, to improve the evenness of the alloying process and the alloying degree of the strip steel cladding; in addition, flat roll surface roughness and flat extensibility are selected, to control the cladding surface roughness and cladding surface flat rate and improve the shaping performance of the steel sheet. The invention also provides an alloyed hot-dip galvanized steel sheet manufactured by the method for controlling the alloyed hot-dip galvanized steel sheet cladding phase structure; the hot-dip galvanized steel sheet has excellent cladding powder resistance and shaping performance, and is very applicable to automobile internal and external plates as well as household electric appliance external plates.
Owner:BAOSHAN IRON & STEEL CO LTD

Continuous cleaning equipment system for strip

The invention discloses a continuous belt material cleaning equipment system, comprising a station of a pre-spray cleaning area, a station of an ultrasonic cleaning area, a station of a spray cleaning area, a station for a first air knife water shearing, a station of an acidic or alkaline cleaning area, a station of a pure water spray cleaning area, a station for a second air knife water shearing and a station for hot air drying which are connected in turn and arranged on a frame; the stations are electrically connected with a PLC controller; the PLC controller detects and controls input of the belt material from the station of the pre-spray cleaning area; and the belt material is then output after ultrasonic cleaning, spray cleaning, air drying, acid and alkaline cleaning, pure-water cleaning and drying. The system adopts the PLC controller to automatically control and detect the production process without additional auxilians. The system has the function of removing oil and oxide on the surface of the belt material; and the secondary products meet the requirements of electronic-grade product manufacturing. Washing agent is used to carry out internal circle cleaning without discharging, thereby satisfying environment-friendly manufacturing. The system adopts a method combining rinsing and pre-rinsing, so as to reach the goal of water saving and energy saving.
Owner:GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI

Method for preparing polyolefin microporous membrane with symmetrical upper and lower surface structures

The invention provides a method for preparing a polyolefin microporous membrane with symmetrical upper and lower surface structures. The method comprises the following steps of: 1) mixing polyolefin resin with a diluting agent in a weight ratio of 1-6:4-9; 2) extruding the mixture by a neck ring mold in an extrusion flow-casting mode and performing cold rolling and strip casting to obtain a thick sheet; 3) preheating the thick sheet and stretching the preheated thick sheet longitudinally and transversely; 4) shaping the stretched thick sheet; 5) extracting the diluting agent and drying the thick sheet; 6) stretching the thick sheet transversely and shaping the stretched thick sheet; and 7) winding the shaped thick sheet. For the polyolefin microporous membrane prepared by the process steps, the upper and lower two surfaces of the thick sheet are particularly provided with a set of rollers with the same diameter respectively, or one side of an air knife is provided with a set of the rollers on a conventional cold roller and an air knife auxiliary patch device to obtain the thick sheet in an auxiliary cooling mode, and then, the thick sheet is stretched and extracted to finally obtain a product with symmetrical and uniform upper and lower surface microporous structures and good ventilation property. Furthermore, warping deformation phenomenon is prevented.
Owner:SHENZHEN SENIOR TECH MATERIAL

Method and apparatus for making flexible articles having elastic-like behavior with visually distinct regions

A method of forming flexible bags from a continuous web is disclosed. The method includes introducing a continuous web of sheet material and passing it through a process whereby the flexible bag is formed having elastic-like behavior. The continuous web is processed into a continuous web having at least two regions that are visually distinct. A sheet material is introduced having one portion of the sheet material overlapping another portion of the sheet material. The sheet material is formed into a strainable network. The strainable network includes a plurality of first regions and a plurality of second regions. The first regions are substantially un-deformed and the second regions are formed into disengageable pleat elements. As the overlapped portions of the sheet material are formed they engage each other at the pleat elements. The pleat elements of each overlapped portion become engaged within each other and resist disengagement because of the frictional forces of the sheet material. The overlapped portions of the sheet material are separated using a disengaging means so that the overlapped portions become disengaged and are separated from each other while riding on the disengaging means. The disengaging means is in the form of either air knife, static opening bar, dynamic opening bar, or suction means, and any combinations thereof.
Owner:BROERING SHAUN THOMAS +2

Alloyed zinc aluminum magnesium alloy coated steel plate and production method thereof

The invention provides an alloyed zinc aluminum magnesium alloy coated steel plate and a production method thereof. The coating has an Fe content of not more than 5%, the coating surface contains an MgZn2 phase, which has a particle size of not greater than 5 micrometers. The coating surface is in the form of equiaxed grains, and in the coating, Mg accounts for 1.5-8wt%, aluminum accounts for 1.5-15wt%, and rare earth accounts for 0-0.2wt%. According to the production method, cold rolled strip steel is subjected to continuous annealing and hot dipping in a continuous hot dip galvanizing unit, and then alloy treatment is carried out on the hot-dip galvanized zinc aluminum magnesium steel plate. Chemically, a plating solution comprises 1.0-11wt% of Al, 0.5-5wt% of Mg, and the balance Zn and inevitable impurities. After the steel plate undergoes annealing by N2 containing 0.5%-30 vol % of H2, the steel plate is immersed in the plating solution at a temperature of 450-650DEG C, the steel plate enters a zinc pot at 420-580DEG C, and the immersion plating time of the steel plate in the plating solution is 1-10s. After air knife cooling, the zinc aluminum magnesium steel plate enters an alloying furnace to undergo alloying treatment, the alloying temperature is 450-650DEG C, the alloying time is 3-20s, and then the steel plate is cooled at a speed of 10-50DEG C/s. The steel plate provided by the invention ensures that the coating does not fall off in a complex forming process, and after forming, the zinc aluminum magnesium coating can put its excellent corrosion resistance to good use, thus prolonging the service life of components.
Owner:ANGANG STEEL CO LTD

Differential melt electro-blowing spinning device and technology for preparing nanofibers in batches

The invention discloses a differential melt electro-blowing spinning device and technology for preparing nanofibers in batches, and belongs to the field of electrostatic spinning. The device mainly comprises an extruder, a filter screen, a melt metering pump, a spinning manifold, an airflow heating device, an air compressor, an upper plate electrode, a lower plate electrode, a high-voltage electrostatic generator, a guide air knife, a hot rolling device, a receiving device, a screen spreading belt and an air draft system. An outlet of the extruder is connected with the filter screen, and the melt metering pump is connected between the filter screen and the spinning manifold through a flange. Airflow is divided into two portions through a flow divider to be connected to the spinning manifold; after melt is divided and guided in flow through the spinning manifold, a thin uniform-flowing melt layer is obtained at the lower end of a wavy flow guide plate; under the high-voltage electrostatic action, the melt layer forms a plurality of Taylor cones in a self-organization manner, the Taylor cones are stretched and split continuously under the conditions of high-speed airflow and high-voltage electrostatics, and superfine fibers are formed at the receiving end of the screen spreading belt by means of curing. By the aid of the device and technology, difficulties of high viscosity of polymers, low yield, complicated devices and the like are overcome, and industrial production of differential melt electro-blowing spinning can be achieved.
Owner:BEIJING UNIV OF CHEM TECH

An automatic control method for zinc layer thickness in a continuous hot galvanizing zinc line

The invention provides an automatic control method for zinc layer thickness in a continuous hot galvanizing zinc line. According to the method, a self-adaptive controller of a BP neural network structure and a delay estimation strategy are adopted to realize closed-loop precise control of a plating layer; a sampling thickness deviation of the plating layer is adopted as inputs of a self-adaptive control model of the BP neural network structure; and finally reasonable outputs are generated through data treatment of two groups of weighting factors [Delta]wij(n) and [Delta]hj(n) in the self-adaptive control model, so that air-knife pressure can be adjusted in time; and finally, the deviation between a preset value of the thickness of the plating layer and an actual sampling value becomes smaller and smaller. A learning algorithm of the weighting factors refreshes the weighting factors continuously by the smallest deviation between the preset value of the thickness of the plating layer and a measured value as a principle, and finally the results of self-adaptive adjustment of the two groups of the weighting factors make deviation between the preset value of the thickness of the plating layer and the actual sampling value tend to zero. The method can greatly reduce excessive consumption of zinc, improves surface quality of the hot galvanizing zinc plating layer, and increases added value of products.
Owner:ANGANG STEEL CO LTD

Automatic control system for plating thickness of hot galvanizing line

ActiveCN102912275AEliminate thickness errorsEliminate thickness deviationHot-dipping/immersion processesAutomatic controlAutomatic train control
The invention provides an automatic control system for plating thickness of cold rolling hot galvanizing line, which comprises an air knife, a thickness gauge, an industrial PC (Personal Computer), a PLC (Programmable logic Controller) and a plating thickness control program, wherein the control program is run in the industrial PC; the industrial PC and the PLC controller are connected by using a PROFIBUS (Process Field Bus) DP field bus; the PLC controller acquires the actual value of plating thickness and data in production process and sends into the industrial PC; the control program adopts cascade control method; a minor loop is designed into a servo system by utilizing the advantages of conventional PID (Proportion Integration Differentiation) dense sampling; the sampling period of a major loop is 50-100 times of that of the minor loop; the control program calculates the setting values of air knife pressure, distance and frame position in real time according to the actual value of plating thickness and the data in production process and sends into the PLC controller so as to realize the adjustments of the air knife pressure, distance and frame position; and simultaneously, the controls for undisturbed switching and plating variable specification switching in manual/automatic mode are further designed. According to the automatic control system, the deviation of plating thickness can be quickly eliminated, and the system has good control effect on variable specification in the processes of accelerating and decelerating.
Owner:ANGANG STEEL CO LTD

Automatic cleaning method and device for aluminium alloy composite boards

The invention relates to an automatic cleaning method and a device for aluminium alloy composite boards. The method comprises the following steps: putting composite boards on a feeding platform; and orderly transporting the composite boards to an ultrasonic cleaning region, a spraying and rinsing region and an airing and drying region by using a transport mechanism, wherein after the composite boards are transported to the ultrasonic washing region, an ultrasonic cleaning mechanism carries out ultrasonic washing on two sides of each composite board to remove pollutants and part of oxides on the board surface, and a spraying and rinsing mechanism is arranged at the back end of the ultrasonic washing region and used for removing the cleaning solution and impurities, thereby preventing the cleaning solution from being taken into the drying region. The device comprises the ultrasonic cleaning mechanism, the spraying and rinsing mechanism, an air knife dewatering mechanism and a hot air drying mechanism, wherein the transport mechanism is arranged among the ultrasonic cleaning mechanism, the spraying and rinsing mechanism, the air knife dewatering mechanism and the hot air drying mechanism to connect the mechanisms; and the transport mechanism is provided with the feeding platform on which composite boards are put. Compared with the traditional cleaning method, the invention saves the fixed investment by about **yuan, enhances the efficiency by more than 80%, and has high economic benefit.
Owner:HANGZHOU HANGYANG

Fully-automatic optical element cleaning device with ultrasonic-megasonic composite frequency

The invention discloses a fully-automatic optical element cleaning device with an ultrasonic-megasonic composite frequency. The ultrasonic-megasonic composite frequency covers low/intermediate/high ultrasonic frequencies and low/intermediate/high megasonic frequencies. Particularly, an appropriate program and process parameters are selected to aim at super-clean washing requirements for an optical element, and pollutants from a micron scale to a nanometer scale on the surface of the optical element can be effectively removed. The fully-automatic optical element cleaning device with the ultrasonic-megasonic composite frequency has the main characteristics that an ultrasonic solution soaking cleaning tank, a megasonic cleaning tank and a spraying tank are designed; different frequency ultrasonic and megasonic waves are adopted, and cleaning requirements from a micron size to a nanometer size are covered; a workpiece is driven by a cylinder to reciprocate up and down in a tank body, a wave node of a standing wave field is prevented from being generated in a fixed area of the surface of the workpiece by virtue of a frequency sweeping function of an ultrasonic-megasonic generator, and the surface damage is avoided; the tank body adopts overflow cycle heating filtration; the total length of an overflow front edge is increased by using a trapezoidal saw-tooth type overflow edge design to obtain uniform and stable overflow; an inclined workpiece clamping device cooperates with an air knife and a slow lifting mechanism to dry the workpiece.
Owner:TONGJI UNIV +1

Method for Removing Deposit from Substrate and Method for Drying Substrate, as Well as Apparatus for Removing Deposit from Substrate and Apparatus for Drying Substrate Using These Methods

In a method for removing deposit that has attached to a main surface of a substrate from the main surface of the substrate using air knife units where a slit portion is formed so that a fluid can be discharged in band form, a fluid introduction path having an approximately uniform form in the direction perpendicular to the direction in which a number of air knife units move relative to the substrate is formed between the air knife units and the main surface of the substrate while the air knife units move relative to the substrate, a fluid is discharged toward the fluid introduction path from a slit that is formed in the rear portion of the above described air knife units, and then, passes through the fluid introduction path so as to be led to a wall surface that is formed so as to face the front portion of the air knife units or the fluid which has the appearance of a wall surface, and furthermore, deposit on the substrate that has attached to the substrate is led away from the main surface of the substrate, together with said fluid, via a fluid lead-out path of which the cross sectional area of the low path is greater than that of the fluid introduction path, and which is formed between the air knife units and the wall surface.
Owner:MITSUBOSHI DIAMOND IND CO LTD

High-corrosion-resistance hot galvanizing aluminum-magnesium-nickel rare earth alloy coated steel plate and production method thereof

The invention relates to a high-corrosion-resistance hot galvanizing aluminum-magnesium-nickel rare earth alloy coated steel plate and a production technology of the steel plate. According to the steel plate, a base plate is made of low-carbon steel, alloy components of a coating include 5-25% of Al, 1-5% of Mg, 0.1-0.3% of Si, 0.01-0.1% of Ni, 0.01-0.1 of Ce and Zn. The production technology includes the steps of conducting cold rolling on a raw material plate, conducting electrolysis and degreasing, heating a vertical annealing furnace through full-radiation tubes for annealing, conducting plating on an inductive heating type zinc pot, using a pure nitrogen air knife, conducting cooling after plating, conducting finishing and tension leveling, conducting passivation, conducting drying, conducting electrostatic oiling, and conducting inspection, packaging and storage. Magnesium nickel enrichment is formed on the surface of the coating, surface oxidation resistance of the coating of the steel plate is effectively improved, and accordingly blackening resistance and corrosion resistance of the coating of the steel plate are improved. A trace amount of rare earth elements are added in the coating to be matched with a proper amount of Al and Zn, the structure of the coating is refined, and adhesiveness, welding performance and machinability of the coating are improved.
Owner:GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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