1487 results about "Air knife" patented technology

The invention provides an intelligent control method and system for the zinc layer thickness of continuous hot galvanizing, and relates to the technical field of data processing, and the method comprises the steps: collecting the historical production data of a production line, and constructing a zinc layer thickness and air knife pressure prediction model; the two models are trained according to historical data, and a setting table of the distance and height of the air knife is obtained through statistical analysis; acquiring real-time production data, determining air knife parameters according to the setting table, and inputting the air knife parameters into the trained air knife pressure prediction model to obtain an air knife pressure set value; and inputting the real-time data and the air knife set value into the zinc layer thickness prediction model to obtain a first zinc layer thickness prediction value. If the predicted value meets a preset standard, current air knife parameters are stored, otherwise, a feedback adjustment mechanism is used for adjusting air knife pressure, and a second zinc layer thickness predicted value is calculated; if the adjusted predicted value meets the requirement, air knife parameters are stored; if the requirement is not met, the adjusting step is repeated; and intelligent control is carried out through the stored air knife parameters.

The invention discloses pretreatment equipment for LCD (liquid crystal display) glass substrate processing, which comprises a roller conveyor, a cleaning device and a drying device, the cleaning mechanism comprises a spraying pipe arranged in the isolation hood, and air knives are arranged on the two sides of the spraying pipe in an inwards inclined mode respectively; the water collecting and draining tank is arranged on the lower side of the roller conveyor on the lower side of the isolation hood; the demisting mechanism comprises an adsorption cotton roller rotationally mounted on the inner side of the air knife, and the air knife is provided with a guide groove for extruding and scraping the adsorption cotton roller; the drying device comprises a drying chamber; the air inlet mechanism comprises an air blower, the air inlet end of the air blower is connected to the corresponding air distribution pipe, a connecting pipe is rotationally installed in the air distribution pipe, a cylindrical filter element is fixedly connected to the connecting pipe, and an impeller of the air blower and the connecting pipe are in transmission connection to the output shaft ends of the corresponding driving motors respectively. The LCD glass substrate cleaning and drying device can effectively ensure the cleaning effect and the drying effect on the LCD glass substrate.

The invention relates to a high-uniformity slit coating air knife system, a control method and a coating machine. The high-uniformity slit coating air knife system comprises an air knife lifting module which is mounted on the inner side of an air knife fixing frame and is used for lifting an air knife main body on the inner side; the air knife angle adjusting module is mounted on the inner side of the air knife lifting module and used for adjusting the angle of the air knife body on the inner side; a combined type air cavity structure is formed in the air knife main body; the air knife body is sequentially divided into three independent temperature control air areas in the left-right direction. The dynamic wind pressure adjusting system is used for feeding back and adjusting wind speed based on real-time film thickness monitoring data; an air pressure and temperature linked airflow temperature coupling control system; and the air speed and air pressure fine adjustment mechanisms are mounted on the air knife main body. The thickness uniformity of the coating is improved to + / -0.5 [mu] m; the drying energy consumption is reduced by 50% (compared with flash evaporation); the takt is increased from original 5 minutes to 30 seconds; the maximum 1.2 m breadth coating is supported, and the tail end air pressure difference is smaller than 1%.

The invention relates to the technical field of steel plate hot-dip production, and discloses an intelligent scheduling system for a steel plate hot-dip production process. The system comprises a working condition sensing module which is used for continuously collecting steel belt inlet temperature, zinc liquid component concentration fluctuation data, air knife pressure time sequence parameters and roller system operation state signals of a galvanizing pot area; the feature extraction module receives the working condition data flow, analyzes the steel strip surface temperature field distribution features and the zinc liquid viscosity change rule, and generates a process feature spectrum; the parameter optimization module dynamically adjusts membership function parameters and rule base weight coefficients of the fuzzy reinforcement learning controller according to the process characteristic spectrum, and outputs an optimized plating layer control parameter set; the self-adaptive plating layer control module generates a plating layer thickness control instruction based on the real-time zinc liquid temperature parameter and the optimized plating layer control rule set; and the dynamic roller system scheduling module realizes global cooperative control of the roller system speed based on the instruction. The system can realize intelligent scheduling of the steel plate hot-dip production process.

The invention discloses a polypropylene film for a film capacitor, the polypropylene film is composed of polypropylene and a cyclic olefin polymer, a plurality of gaps are distributed in the film, the gaps are approximately annular on the cross section of the film, and the inner diameter of the approximately annular gaps is 20-120nm. The invention also provides a preparation method of the polypropylene film, which comprises the following specific steps: putting the polypropylene and the cyclic olefin polymer into an extruder, heating and melting; the melt is extruded through a T-shaped die head and attached to a piece casting roller through an air knife for piece casting, and the temperature of the piece casting roller is 85-95 DEG C; the method comprises the following steps: preheating a cast sheet, longitudinally stretching at the stretching rate of 4-7 times and at the temperature of 135-150 DEG C, preheating the longitudinally stretched sheet at the temperature of 145-160 DEG C, transversely stretching at the stretching rate of 7-10 times and at the stretching temperature of 165-180 DEG C, and then entering a shaping area at the temperature of 168 DEG C; and carrying out corona treatment, rolling, curing and slitting on the heat-set film to obtain the product. The polypropylene film has good high temperature resistance and high pressure resistance, and is suitable for the field of capacitors.

The glass fiber self-adhesive tape gluing mechanism is characterized in that bearing seats are symmetrically arranged on the upper surface of one end of a glue groove and located on the two sides, the two ends of a gluing roller are connected with the bearing seats in a matched mode respectively, the lower portion of the gluing roller is arranged in the glue groove, and vertical plates are arranged on the two sides of the upper surface of the other end of the glue groove; the two vertical plates are arranged on the upper surface of the glue groove, the ends, close to the glue spreading roller, of the vertical plates are connected with the baffle, a scraper which is obliquely arranged is arranged between the vertical plates, an air knife is arranged between the vertical plates and located above the scraper, and an air outlet of the air knife faces the scraper. According to the glass fiber self-adhesive tape, the scraper is used for scraping off redundant adhesive on the lower surface of the glass fiber gridding cloth, meanwhile, through cooperation of the air knife, on one hand, hole blowing is achieved, the redundant adhesive is blown off, and on the other hand, the adhesive accumulated at the end of the scraper is blown off along the scraper, so that the quality of the glass fiber self-adhesive tape is guaranteed.

The utility model relates to a cleaning type bucket elevator in the field of elevator equipment. The cleaning type bucket elevator comprises an engine base, an elevator body, a driving chain wheel, a driven chain wheel, an elevating chain and an elevating hopper, a cleaning cabin is arranged below the discharge port, a vibrating roller and an air knife are arranged in the cleaning cabin, a plurality of flexible vibrating hammers are spirally and uniformly distributed on the roller surface of the vibrating roller, and the flexible vibrating hammers can respectively form alternate knocking on the bottom of the lifting hopper and the bottom of the discharge port in the rotating process; the air knife is mounted at the bottom of the cleaning cabin, an air outlet of the air knife is obliquely upwards close to the outer edge of the lifting hopper, and the air knife does not interfere with each lifting hopper and the flexible rapping hammer; and a driving motor is arranged above the machine body and is in transmission connection with the driving chain wheel and the vibrating roller respectively. The cleaning type bucket elevator has a more perfect self-cleaning function, residual powder materials on the inner wall of the discharging port of the elevator and the inner wall of each lifting hopper can be cleaned at the same time, and the lifting and conveying efficiency of the bucket elevator can be guaranteed.

The utility model provides an auxiliary dust removal mechanism for a pipeline, which comprises an air knife, a plurality of air cabins which are annularly distributed are arranged in the air knife, and each air cabin is provided with an air inlet end and an air outlet end; the air adjusting piece is movably connected with the air knife and is used for adjusting the opening degree of the air outlet end; and the advancing rollers are distributed on the outer wall of the air knife and can roll in the axial direction of the air knife. According to the pipeline auxiliary dust removal mechanism and the using method thereof, dead-corner-free dust removal in the telescopic corrugated pipeline can be achieved, the air volume, the air speed and the outer contour size can be flexibly adjusted, the pipeline auxiliary dust removal mechanism adapts to different dust removal working conditions, the dust removal efficiency and cleanliness are greatly improved, and meanwhile the labor intensity of manual dust removal is reduced.

The invention discloses a novel laser thermal spraying gun, and belongs to the technical field of laser additive manufacturing, the novel laser thermal spraying gun comprises a connecting seat, an air knife assembly, an inner nozzle, an outer nozzle, a cooling sleeve cover plate and a cooling sleeve, the outer nozzle comprises a powder feeding body and a Laval pipe, and a diffusion hole is formed in the Laval pipe; the Rafael nozzle accelerates air flow through a gradually-shrinking-gradually-expanding structure, a high-speed and high-temperature jet flow environment is formed, powder is fully preheated and evenly dispersed before reaching a base body, the Rafael pipe and laser spraying are combined, the advantages of the laser cladding technology and the thermal spraying technology are combined, the acceleration effect of Rafael air flow is overlaid, and the thermal spraying effect of the laser cladding technology and the thermal spraying technology is improved. Under the action of high-temperature and high-pressure air flow, the powder is in full contact with a laser heat source in a flying distance long enough through a Laval nozzle, so that the powder and a matrix form metallurgical bonding in a molten state, the bonding strength can be 2-3 times that of traditional thermal spraying, and the powder is suitable for the limited space environment of water erosion protection and repair of the steam turbine blade.

The present invention discloses a gas infrared radiation and hot air dual-mode drying furnace for drying printing inks, which comprises a furnace body housing. Inside the furnace body housing, there are a heating chamber and two machine position chambers. The two machine position chambers are symmetrically distributed at the top and bottom of the heating chamber. An inlet and an outlet penetrating through the furnace body housing are respectively arranged on both sides of the middle of the heating chamber. The present invention heats printing paper through two modes of gas infrared radiation and hot air. Due to the physical properties that infrared rays can penetrate and objects can actively absorb the heat of infrared rays, the ink and the interior of the paper can be quickly heated. In the later stage, the high-temperature flue gas waste gas generated by the front-end gas infrared radiation burner is used, and is guided to the air knife for drying through the hot air circulation mode by a blower and a forced air blower. The gas consumption of the burner is lower, and the heating speed is faster, further reducing the gas energy consumption. Under the condition of the same gas consumption, the speed of the printing press is significantly increased, meeting the requirement of lower gas energy consumption of existing conventional gas burners.

The invention discloses a screen display glass edge grinding device which comprises a grinding seat and grinding wheels, a glass inlet is formed in the grinding seat, the grinding seat comprises a seat body, an air knife seat body and a water knife seat body which form a grinding cavity, and the grinding wheels are vertically inserted into the grinding cavity. The air knife seat body comprises an upper air knife and a lower air knife which blow the grinding wheel and are distributed in an arc shape around the circle center of the grinding wheel; the water jet cutter seat body comprises a water jet cutter and a waste collecting module. On one hand, the closed grinding section is formed between the upper and lower arc-shaped air knives and the grinding wheel, fluid is flushed out through the water jet cutter, waste generated by grinding is flushed out of the grinding section along with rotation of the grinding wheel, the probability that fine dust escapes outwards and is secondarily attached to the surface of glass is effectively reduced, and the collection rate of the waste is improved; and on the other hand, based on cooperation of the main collecting branch and the auxiliary collecting branch, waste rushed out of the second end is shunted and gently collected, the splashing and accumulation phenomena generated when the waste impacts the inner wall of the grinding cavity are effectively reduced, the cleaning frequency is remarkably reduced, and the grinding efficiency is improved.

The utility model relates to section steel hot galvanizing equipment, and belongs to the technical field of hot galvanizing. According to the technical scheme, the low point of the front end of a magnetic roller frame is located on the discharging side of a zinc pot, the high point of the rear end of the magnetic roller frame is matched with an inclined roller way, and the inclined roller way inclines upwards and is matched with the inclination angle of a row of magnetic rollers; an air knife is arranged at the low point of the front end of the magnetic roller frame, and the air blowing direction of the air knife faces the zinc pot; and after the whole group of section steel is adsorbed by the magnetic roller after galvanization on the lifting hook, the surface of the whole group of section steel is cleaned through the air knife, and redundant zinc liquid after cleaning is blown back to the zinc pot. The device has the positive effects that the material receiving hook groups are alternately finished in the processes of material receiving, galvanizing and leading up, the efficiency is improved, the product quality is stable, the whole group of profile steel is led up by adopting the magnetic roller, meanwhile, the zinc blowing treatment is performed on the discharge side of the zinc pot, the process flow is shortened, the air knife is arranged in the area of the zinc pot, redundant zinc liquid is directly blown back to the zinc pot, and the production cost is reduced. And the zinc consumption is further reduced.

The invention provides a food processing conveying device with a cleaning effect, and relates to the technical field of food processing conveying, the food processing conveying device comprises two conveying frames, a conveying mechanism, a cleaning mechanism and a sweeping mechanism; the conveying mechanism comprises two conveying rollers arranged on the inner sides of the two conveying frames, the surfaces of the two conveying rollers are sleeved with a conveying belt, and a driving motor is arranged on the left side of the back face of the conveying frame on the front side. According to the scheme, when food containing sugar or colloid is conveyed, a hydraulic rod extends rightwards to make a movable wiping plate dip in cleaning liquid at the bottom of a mounting box, the hydraulic rod retracts to make the movable wiping plate reset, a conveying belt is cleaned through the movable wiping plate, and the conveying belt is dried through an air knife after cleaning; the cleaning mechanism is in a working state all the time, normal conveying of food is not affected, and the device is designed in a modular mode, convenient to install, easy to maintain and better in combined cleaning effect.

The utility model belongs to the technical field of tobacco production, and particularly relates to a device for cleaning a barrel-type film-covered filter element, which comprises a dust collection barrel, a cleaning air knife assembly, a catch wheel, a carrier roller and a power-assisted air knife assembly, and is connected with the barrel-type film-covered filter element cleaning assembly in a manner that the barrel-type film-covered filter element is sleeved outside the cleaning air knife assembly; the outer surface of the barrel-type membrane filter element is in rotary contact with the outer walls of the two carrier rollers respectively, and the end face of the blind cover of the barrel-type membrane filter element is in rotary contact with the rotary end of the catch wheel 3. The device disclosed by the utility model can shorten the time consumed by soot blowing and cleaning of a single filter element, greatly improve the cleaning efficiency, avoid the damage to the filter element or pollution and damage to the environment caused by a traditional soot blowing mode, save the energy consumption of compressed air used for soot blowing, and have important significance in popularization in the whole tobacco industry.

The invention provides lead frame cleaning equipment which comprises a material taking table and further comprises a cleaning cabinet on one side of the material taking table, a transverse plate is arranged in the cleaning cabinet, a material taking mechanism is arranged on the material taking table, and a conveying mechanism, a wind power mechanism and an adsorption mechanism are arranged in the cleaning cabinet. An electric pulse signal is converted into mechanical motion through the stepping single machine to drive a compression part in the compression base to vibrate rapidly so as to generate high-speed airflow, the airflow enters the ion air knife through the compression air outlet, the ion air knife generates positive and negative ions through high-voltage ionization, and ions are conveyed to a target area through the high-speed airflow. Static electricity and dust of the square frame body moving to the position below the ion air knife are eliminated through the static electricity neutralization effect, air in the negative pressure box and the negative pressure hopper is pumped out through the air pump so that negative pressure can be generated, negative pressure openings are formed in the upper portion and the two sides of the conveying belt, and therefore dust collection can be conducted on the upper portion and the lower portion of the frame body and the two sides of the conveying belt, and the cleaning effect is improved.

The utility model discloses a high-precision air knife for perovskite slit coating, and relates to the technical field of coating. The left knife lip and the right knife lip are arranged in parallel, the gasket is arranged between the left knife lip and the right knife lip, a first constant-pressure groove is formed in the upper end of the inner wall of the left knife lip, a second constant-pressure groove is formed in the first constant-pressure groove, a rectangular flow stabilizing groove is formed in the lower end of the inner wall of the left knife lip, and an air inlet hole is formed in the upper surface of the left knife lip; the air inlet is communicated with the first constant-pressure groove and the second constant-pressure groove, and mounting holes are formed in the two opposite surfaces of the left knife lip. According to the utility model, the compatibility is higher, the gasket is arranged between the left knife lip and the right knife lip, so that the thickness of the used gasket can be conveniently changed according to the actual use condition, and more choices can be provided for the volatilization rates of different solutions by customers; the air pressure of the air outlet can be regulated and controlled in a multi-stage mode by a client, the precision of the air knife is improved, and therefore the air pressure can better meet the requirements of the client.

The invention relates to the technical field of coating thickness control, in particular to a closed-loop control method, system and equipment for improving the uniformity of a strip steel edge zinc layer and a medium. The closed-loop control method comprises the following steps: step 1, at an air knife injection section, dividing 18 control points at equal intervals in the length of the whole body of an air knife lip, and arranging a thickness gauge behind the air knife; step 2, measuring the thickness of the zinc layer at each point in the width direction of the strip steel by a thickness gauge, and normalizing the width; 3, according to the zinc layer thickness data and the normalized plate width, the strip steel plate shape is fitted based on the Legendre polynomial, and the coefficient # imgabs0 # of the second-order Legendre polynomial is solved through fitting of the least square method; 4, the interval range of # imgabs1 # is judged, and corresponding operation is executed; and step 5, circularly executing the step 2 to the step 4. The method can effectively solve the problem of poor uniformity of zinc layers at the edges of strip steel of different specifications, so that the distribution of the zinc layers in the width direction of the strip steel is more consistent.

The embodiment of the invention provides preparation equipment and a preparation method of an intermittent electrode plate. The preparation equipment comprises an unwinding device, a diaphragm feeding device, a compounding device and an air knife, wherein the unwinding device is used for conveying a current collector of which the surface is intermittently distributed with a conductive adhesive to the compounding device; the membrane feeding device is used for conveying a continuous membrane to the compounding device; the compounding device is used for receiving the continuous diaphragm and the current collector, and performing hot-pressing compounding on the continuous diaphragm and the area, where the conductive adhesive is distributed, of the current collector to obtain an electrode plate; the air knife is arranged on the discharging side of the compounding device and used for cutting off a membrane area which is not compounded with the current collector in the electrode plate to obtain an intermittent electrode plate, and the intermittent electrode plate comprises the current collector and an intermittent membrane compounded on the surface of at least one side of the current collector. The preparation equipment is used for achieving the effect that the intermittent electrode plate is prepared by adopting a dry method so as to meet the design requirements of various battery structures.

A dishwasher includes a tub having a top wall extending between opposing side walls. The tub defines a washing chamber. A dishrack operable between a stowed state within the washing chamber and a deployed state extending at least partially out of the washing chamber. An air drying system is coupled to the tub and includes a housing coupled to the top wall of the tub. The housing extends into the washing chamber proximate the dishrack and defines an air inlet. An air knife coupled to the housing and extending along a width of the washing chamber proximate to the top wall of the tub. The air knife defines a slit. A blower operably coupled to the air knife is configured to draw air through the air inlet and direct the air through the slit of the air knife to generate an air curtain across the width of the washing chamber.

The present application relates to a high-roughness surface treatment method for a braking steel backing, and belongs to the technical field of surface treatment of braking steel backings. The method comprises the following operation steps: step one, placing onto a feeding table a braking steel backing to be processed, and conveying the braking steel backing by means of a conveyor belt so as to perform processing; step two, in an HRT polishing assembly, sequentially passing the steel backing through an ordinary belt sander, a forward planetary gear, a reverse planetary gear and an HRT belt sander to complete the processes of surface roughness treatment and deburring; step three, in a cleaning and rust-proofing assembly, removing processing residues and a saponification liquid from the surface of the braking steel backing by means of a rough cleaning sprayer, and then an air knife I blowing off a cleaning liquid and metal residues; step four, using a rust-proofing sprayer to spray a rust-proofing liquid, and then performing double air cutting; and step five, placing the braking steel backing which has been subjected to surface treatment into a material box for standby storage. By means of treating the surface of the braking steel backing bonded with a friction material, the effects of more stable quality and high-roughness mating surfaces are achieved.

The utility model relates to the technical field of aluminum processing hot rolling process, in particular to an automatic emulsion oil skimming device which comprises a box body, a partition plate arranged in the box body divides the box body into a standing cavity and a dirty oil cavity, the partition plate is lower than the top end of the box body, an oil skimming opening is formed by the distance between the partition plate and the top surface of the box body, and the automatic emulsion oil skimming device further comprises an air knife arranged above the standing cavity. The air outlet width of the air knife is not smaller than the length of the oil skimming opening, and the air knife is parallel to the partition plate. An air inlet pipeline of the air knife is connected with an electric control valve, the electric control valve is connected with a controller, and opening and closing of the electric control valve are controlled through the controller, so that opening and closing of the air inlet pipeline of the air knife are controlled. The oil skimming tank is used for solving the problem of low oil skimming operation efficiency of the oil skimming tank in the prior art.

The invention relates to the technical field of semiconductor packaging, in particular to a multi-chip eutectic heating device and a using method, and the multi-chip eutectic heating device comprises a core structure design of multi-component cooperative work: a visible eutectic box, a heating module, a cooling module, a positioning device and other key parts are arranged. Wherein the heating module is combined with the pulse power supply unit to realize accurate temperature control, the cooling module is used for rapidly cooling through a multidirectional blowing hole, and the positioning device ensures stable clamping and accurate adjustment of a workpiece. In addition, the protective atmosphere supply module creates an ideal eutectic environment, the calibration mechanism assists in high-precision positioning, and the air knife ensures clear visual inspection. According to the invention, the purpose of efficient and controllable multi-chip eutectic processing is achieved, the production efficiency and the product quality are remarkably improved, and meanwhile, the process stability and adaptability are optimized.

The invention relates to the technical field of PCB identification, in particular to an optical identification point manufacturing method of a PCB and an optical point structure, and the method comprises the following steps: S1, adding a process edge on a long edge of the PCB, and arranging the optical point structure on the process edge; s2, melting the tin bar in a tin cylinder through high temperature to form soldering tin alloy slurry of copper, tin and nickel in a proper proportion; and S3, the PCB is immersed in a tin furnace for a period of time, relevant parameters of a tin spraying machine and an air knife are adjusted to a proper range, and hot air leveling is conducted on the PCB. And S4, the PCB is taken out, whether the tin spraying thickness meets the requirement or not is checked, and if not, the air pressure of the tin spraying machine is adjusted. And S5, fixing the PCB which is processed and meets the requirement, and adjusting a lens to identify the PCB. Compared with the prior art, the copper optical points on the surface of the PCB are exposed through the solder resist windowing of the point A, the color of the base material below the point A is exposed, identification is convenient, the point B adopts the NPTH hole, the solder resist windowing is also used, and the point A and the point B control the tin thickness meeting the requirement through the tin spraying process.

The utility model relates to a spatter-free grinding device which comprises a main body, a grinding wheel, an air knife assembly and a water spraying assembly, a containing cavity is formed in the main body, the grinding wheel is rotatably arranged in the containing cavity, a grinding opening is formed in the front side of the containing cavity, the air knife assembly comprises two air knives oppositely arranged at the grinding opening, and the water spraying assembly is arranged in the containing cavity. Air outlets of the air knives face the containing cavity in an inclined mode, a gap allowing a product to be machined to slide through and making contact with the grinding wheel is formed between the two air knives, the surfaces, close to the grinding opening, of the air knives are sunken inwards to form sunken parts, and a shielding protruding edge is arranged on one side of each sunken part. The periphery of the grinding wheel extends into the concave part and is located between the two shielding protruding edges, the water spraying assemblies are arranged at the two ends of the grinding opening, the main body is provided with an air suction unit communicated with the containing cavity, and the air suction unit is used for making the containing cavity generate negative pressure so that water mist can be sucked into the containing cavity and discharged out of the containing cavity. According to the utility model, water mist can be effectively prevented from splashing to the surface of a product in the grinding process, so that the cleanliness and the quality of the product are improved.

The utility model discloses an anti-slag-returning laser processing system and laser processing equipment, a laser processing head is used for outputting a laser beam, and the laser beam extends along a first direction; the anti-slag-returning assembly comprises an installation structure used for being connected with the spraying end of the laser machining head in an installation mode, a magnetic attraction piece installed on the installation structure and at least one air knife piece, and the laser machining head, the magnetic attraction piece and the air knife pieces are arranged at intervals in the first direction; an air outlet is formed in the air knife piece and used for spraying airflow in the second direction, the airflow is subsonic airflow or supersonic airflow, and an included angle is formed between the first direction and the second direction. And through the arrangement of a double anti-slag-returning structure of the magnetic attraction piece and the air knife, welding slag is prevented from splashing to the laser machining head, the risk that a lens of the laser machining head is polluted is reduced, and therefore the service life of equipment is prolonged, and the laser machining quality is improved.

The invention discloses a hydrolysis-resistant reinforced high-temperature nylon composite material and a preparation method thereof, and relates to the technical field of nylon composite materials. According to the composite material, a PA66-PA46 random copolymer, bio-based polyamide 1010 and PA6 resin are used as matrixes, and are matched with a composite reinforcement formed by silane coupling agent modified carbon nanotubes and hydrolysis-resistant alkali-free glass fibers; and a polycarbodiimide and epoxy-terminated polyether compounded hydrolysis-resistant agent, a bio-based composite nucleating agent, an antioxidant complexing agent, a fatty acid amide flowable agent and an inorganic coloring agent are used as auxiliary materials. The preparation method comprises the following steps: raw material synergistic pretreatment, ultrasonic-mechanical shearing synergistic premixing, dynamic pressure-regulating twin-screw extrusion blending, water mist-water cooling-air knife synergistic cooling pelletizing and vacuum pulse drying-crystallization synergistic post-treatment. The composite material is uniform in structure and stable in performance, has excellent hydrolysis resistance and high-temperature resistance, and is suitable for application scenes with relatively high requirements on material environment stability.

The invention provides a film tearing mechanism and film tearing equipment, the film tearing mechanism is used for tearing a film layer covering the surface of a product, the film tearing mechanism comprises a connecting plate, a film lifting module, a clamping module, a driving module and an air knife module, and the film lifting module, the clamping module, the air knife module and the driving module are all arranged on the connecting plate. The film lifting module comprises a film lifting wheel and a film lifting wheel driving assembly connected with the film lifting wheel, and the film lifting wheel driving assembly is used for driving the film lifting wheel to move to or away from the surface of the product and further used for driving the film lifting wheel to move on the surface of the product in a reciprocating mode so that the corners of the film layer can be separated from the product; the clamping module comprises a clamping jaw group, and the clamping jaw group is used for clamping corners of a film layer; the air knife module is arranged on one side of the clamping module and comprises an air knife, and the air knife is used for blowing air between the film layer and the product after the corners of the film layer are separated from the product, so that the film layer is pre-separated from the product; and the driving module is connected with the clamping module, and the driving module is used for driving the clamping module to move, so that the film layer is separated from the product.

A multi-channel air knife comprises a shell, a ventilation cavity is formed in the shell, a main ventilation cavity and an auxiliary ventilation cavity which are not communicated with each other are formed in the ventilation cavity, the main ventilation cavity is a high-speed airflow channel, and the auxiliary ventilation cavity is a low-speed airflow channel; the main ventilation cavity is provided with a main ventilation opening formed in the length direction of the ventilation cavity, and the auxiliary ventilation cavity is provided with a plurality of air uniformizing holes used for air outlet. An air nozzle communicated with the ventilation cavity is arranged at the bottom of the shell; compared with the prior art, through the physical isolation design of the main ventilation cavity and the auxiliary ventilation cavity, independent control over auxiliary uniform flow of high-speed airflow and low-speed airflow is achieved, the airflow speeds of different areas are accurately adjusted, and more flexible wind power distribution is achieved; and the start-stop or the air volume of the two channels of the main ventilation cavity and the auxiliary ventilation cavity is independently controlled according to actual requirements.

The invention discloses belt type concentration and dehydration equipment for sludge treatment, and relates to the technical field of sludge treatment. The sludge dewatering device comprises a bottom frame and a top frame, the top frame is stably installed at the top end of the bottom frame through bolts, a plurality of guide rollers are rotationally arranged in the bottom frame and the top frame, the outer walls of the guide rollers in the bottom frame and the top frame are sleeved with filter belts correspondingly and used for sludge dewatering, and the ends, close to the discharging opening, in the bottom frame and the top frame are each provided with a desliming assembly. The middle parts of the bottom frame and the top frame are respectively provided with a spray-washing assembly and a vibration composite drainage assembly, and impurity adsorption assemblies are respectively arranged at one ends, close to the feed port, in the bottom frame and the top frame; through the arrangement of the vibration composite drainage assembly and the impurity adsorption assembly, the vibration composite drainage assembly firstly accelerates the separation of water in pores of the filter belt through high-frequency vibration, then cooperates with a high-strength air curtain sprayed by an air knife to quickly peel off water stains on the surface, and then performs secondary adsorption cleaning on residual fine particles on the surface of the filter belt through the impurity adsorption assembly; impurities are effectively prevented from blocking filter holes, and water permeability of the filter strip is maintained.

The utility model relates to the technical field of film production equipment, in particular to a crease-resistant film attaching air knife structure device which comprises a box body, and a high-pressure fan is installed on the narrow side face of the outer portion of the box body. The leveling roller is attached to the upper portion of the thin film and synchronously assists the thin film to be attached to the roller when the air knife blows, so that the thin film is prevented from wrinkling in the adsorption process, the air outlet amount of the conveying pipe is gradually reduced when the ball block is gradually attached to the conveying pipe, and therefore air volume adjustment of the air outlet is achieved; the first movable baffle and the two second movable baffles are arranged to adjust the length and the width of the air outlet, and therefore the problems that according to a traditional film attaching air knife structure device, the length, the width and the air outlet amount of the air outlet are inconvenient to adjust, and a film is prone to wrinkling in the film attaching process are effectively solved.