247results about How to "Improve thickness uniformity" patented technology

The utility model relates to the technical field of drying equipment, and provides a packaging box paperboard drying device which comprises a supporting frame and a sealing frame fixedly installed on the supporting frame, a plurality of conveying rollers are installed on the inner side of the supporting frame in a rotating mode, and a conveying belt is arranged outside the conveying rollers in a transmission and sleeving mode. A conveying motor is fixedly installed on one side of the supporting frame, an output shaft of the conveying motor and the conveying rollers are coaxially fixed, a drying assembly used for drying the paperboards is arranged in the sealing frame, and a ventilation assembly used for accelerating drying of the paperboards is arranged in the supporting frame. Through the arrangement of the drying assembly, the packaging box paperboard is dried, hot air generated by the drying assembly can dry the bottom of the packaging box paperboard through operation of the ventilation assembly, and compared with a traditional drying mode, the problem that the bottom of the packaging box paperboard is not prone to making contact with the hot air is solved; in addition, due to the existence of the overturning assembly, the upper and lower surfaces of the packaging box paperboard can be overturned, and the drying effect of the packaging box paperboard is further improved.

The invention discloses a double-sided composite ultrahigh-viscosity self-adhesive film, a production process and equipment, the self-adhesive film comprises a base material layer and an adhesive layer, and the base material layer comprises a surface layer, a middle layer and a bottom layer; the formula of the surface layer comprises 90% of LDPE (Low-Density Polyethylene) and 10% of Exfin; the Exfin is a three-well chemical'silicon-like polyolefin copolymerization master batch '; the formula of the middle layer comprises 70% of LLDPE, 20% of LDPE and 10% of rim charge; and the formula of the bottom layer comprises 95% of LDPE and 5% of SEBS. And the formula of the adhesive layer comprises the following components: 30 parts of SEBS, 40-60 parts of tackifying resin, 10-20 parts of white oil, 1 part of fumed silica and 0.5 part of antioxidant 1010. According to the production process, casting co-extrusion is combined with a coating system, multi-layer materials with great difference can be stably subjected to interlayer melting convergence to form the ultrahigh-viscosity protective film at a time, and the production efficiency is greatly improved.

A method of forming a layer of material on one or more substrates by ALD is disclosed. Embodiments of the presently described methods include performing a plurality of deposition cycles including at least two precursor pulses and an intervening purge pulse to form a layer of material on one or more substrates. During each deposition cycle, a ratio of the process chamber pressure during each of the at least two precursor pulses to the process chamber pressure during the intervening purge pulse is equal to or different from each other.

The invention discloses roll-to-roll gum dipping and rolling integrated equipment, which relates to the technical field of fuel cell production and comprises an unwinding system, a gum dipping system, a drying system, a continuous rolling system and a winding system which are connected in sequence, wherein the unwinding system is used for unwinding a carbon fiber paper raw paper coiled material and outputting a material belt; the glue dipping system is used for dipping the material belt with glue slurry; the drying system is used for drying the sizing material slurry loaded on the material belt; the continuous rolling system is used for adjusting the thickness of the sizing material cured on the material belt; and the winding system is used for rewinding the material strip to form the carbon fiber paper glue-carrying coiled material. According to the device, the carbon fiber paper raw paper coiled material can be continuously subjected to gum dipping, drying and hot rolling processing, a gum material can be uniformly distributed on a material belt, the defects of the surface layer of the gum material are reduced, and the overall production efficiency and production quality of the carbon fiber paper can be effectively improved.

The invention relates to the technical field of release films, and particularly provides a preparation method of a low-temperature-curable and high-wettability release film for MLCC (multilayer ceramic capacitor) tape casting. The release film comprises a base material layer and a release agent layer, the release agent layer is prepared from the following raw materials in percentage by weight: 30%-40% of methylbenzene, 10%-15% of ethyl acetate, 20%-35% of butanone, 10%-20% of organic silicon modified acrylic resin, 2%-3% of a curing agent and 1%-2% of a flatting agent, and the organic silicon modified acrylic resin is prepared from fluoropropenyl trimethoxy silane modified acrylic resin. The surface flatness and wettability of the release film obtained by adopting the scheme are equivalent to those of an imported MLCC release film, and the cost of the release film is far lower than that of the imported MLCC release film.

The invention relates to the technical field of copper plate strip rolling liquid, and provides environment-friendly copper plate strip rolling liquid which comprises the following components in percentage by mass: 40%-50% of base oil, 12%-18% of an additive, 5%-10% of triethanolamine, 0.05%-0.15% of graphene and the balance of water, the additives comprise a lubricant, an antioxidant, a corrosion inhibitor, an emulsifier and a bactericide, wherein the lubricant accounts for 2%-5%, the antioxidant accounts for 1%-2%, the corrosion inhibitor accounts for 0.5%-1.5%, the emulsifier accounts for 5%-10%, and the bactericide accounts for 2%-5%; the base oil comprises synthetic oil, vegetable oil and mineral oil, and the synthetic oil accounts for 20%-50%, the vegetable oil accounts for 15%-45% and the mineral oil accounts for 30%-60%. The rolling force and equipment energy consumption can be effectively reduced, the rolling speed stability is improved, the surface quality, hardness and thickness uniformity of the copper plate strip are remarkably improved, corrosion to equipment is lower, and the production quality and efficiency of the copper plate strip can be improved.

The invention provides a forming method and device for a high-torsion-degree blade, and belongs to the technical field of pipe machining. The forming method comprises the steps that firstly, a tubular blank is filled with low-melting-point metal to form a solid pipe, then the solid pipe is extruded into a preformed blade with cambered surfaces on the two sides through a preforming device, projections of all the cross sections of the preformed blade coincide in the longitudinal direction, and the preformed blade is formed. The method comprises the following steps: pre-forming a blade, respectively clamping two longitudinal ends of the pre-formed blade by adopting a torsion forming device, enabling the two longitudinal ends to relatively rotate so as to twist the blade, correcting the shape of the twisted blade by adopting a shape correcting device, and finally melting the low-melting-point metal to obtain the high-torsion-degree blade. Compared with an existing forming process, the overall deformation process only comprises extrusion, torsion and shape correction, the forming process is simplified, the machining efficiency can be improved, the low-melting-point metal and the tubular blank are compounded from the beginning, and the material buckling problem in the subsequent forming process is avoided.

The invention relates to a preparation method of a PTFE-based copper-clad plate and application of the PTFE-based copper-clad plate, in particular to the field of preparation of high-frequency and high-speed copper-clad plates, and the preparation method comprises the following steps: sequentially carrying out plasma surface treatment, metal film plating and copper layer plating on a copper-clad surface of PTFE to obtain the PTFE-based copper-clad plate; the film layer obtained by plating the metal film comprises one or a combination of at least two of a copper film, a nickel film and a gold film. According to the preparation method provided by the invention, the surface of the PTFE film is activated by adopting a plasma surface treatment process, then the binding force of the copper plating layer and PTFE is improved by depositing the metal thin layer on the surface and matching with activation, and meanwhile, the PTFE-based copper-clad plate obtained after the copper plating layer is plated still has good dielectric properties.

The invention discloses a filter and a forming method thereof, and electronic equipment, and the method comprises the steps: carrying out the thinning of a passivation material layer in a target resonance region through first thinning processing after a piezoelectric laminated structure is provided, so as to enable the thickness of a passivation layer in the target resonance region to be smaller than the thickness of passivation layers in other resonance regions, therefore, the vibration frequency of the passivation layer of the target resonance area is faster than that of the passivation layer of other resonance areas, the frequency of the resonator of the target resonance area shifts rightwards, the target resonance area is used for forming the resonator with the highest vibration frequency, the bandwidth of the corresponding filter is increased, and the bandwidth of the filter is increased. The surface roughness of the passivation layer in the target resonance area is further reduced through the first thinning treatment, which means that the thickness uniformity of the passivation layer in the target resonance area is improved, so that the right side frequency of the filter bandwidth is modulated, the uniformity of the right side frequency of the filter bandwidth is improved, and the filter performance is improved. And during measurement, more frequency points fall within the range of specification requirements, so that the yield of the filter can be improved.

The invention relates to a painting assembly and a painting device, and the painting assembly comprises a supporting frame; the spraying module is arranged on the supporting frame, the spraying module comprises a feeding part, a flow dividing part and a spraying part, the feeding part is provided with a feeding valve, the flow dividing part is provided with a feeding port and a plurality of discharging ports which are communicated with each other, the spraying part comprises a plurality of spraying heads, the feeding port is communicated with the feeding valve, and the discharging ports are communicated with the spraying heads. The plurality of discharge ports are respectively communicated with the plurality of spray heads, and the plurality of spray heads are arranged at intervals along a first direction; and the painting module is arranged on the supporting frame, the painting module comprises a painting roller, and the painting roller is arranged on the side, away from the flow dividing part, of the spray head and is opposite to the spray head. The painting assembly provided by the invention can improve the painting uniformity.

The invention discloses a production method of a hot rolled steel strip with high thickness precision. The production method comprises the following steps of smelting, continuous casting, hot rolling and cooling. The off-line fixed length of the casting blank is 7-8 m; in the hot rolling step, reverse width rolling does not exceed 50 mm; according to the hot coil finished product thickness d, the intermediate billet thickness D and the hot coil head thickness abnormal length L, the descaling process of an intermediate billet head L0 area is determined; in the finish rolling process, the convexity C40 is smaller than 25 micrometers, the wedge shape W40 ranges from 0 micrometer to 10 micrometers, the tension of F6 and F7 ranges from 19 MPa to 21 MPa, and the speed compensation value of F6 ranges from-1.7% to-1.5%; through control of parameters in the continuous casting and hot rolling processes, C25 in the width direction of a full-rolled plate is controlled to be 33-40 microns, C40 in the width direction of the full-rolled plate is controlled to be 26-33 microns, W25 in the width direction of the full-rolled plate is controlled to be 20-25 microns, and W40 in the width direction of the full-rolled plate is controlled to be 17-20 microns, so that the thickness precision of the full-length direction and the thickness precision of the width direction of a hot-rolled steel strip produced

The invention relates to the technical field of energy storage capacitor dielectrics, and provides a high-entropy ceramic-polymer composite energy storage dielectric thin film material, a preparation method and application. The chemical composition of the material disclosed by the invention can be expressed as Sr0. 7Bi0. 2TiO3 (at) (Ba0. 25Ca0. 25La0. 25Na0. 25) TiO3 / PVDF, and is abbreviated as SBT (at) BCLNT / PVDF, the PVDF is polyvinylidene fluoride, the ratio of BCLNT to SBT is 9 wt%-18 wt%, and the ratio of SBT (at) BCLNT to PVDF is 3 wt%-12 wt%. The SBT coated BCLNT is subjected to high-entropy treatment to obtain the SBT coated BCLNT high-entropy ceramic filler with a'core-shell 'structure; and preparing the SBT-coated BCLNT / PVDF high-entropy ceramic-polymer composite energy storage dielectric film by taking the PVDF polymer as a base material and adopting a tape casting method.

The invention relates to the technical field of lubricants, in particular to a low-osmotic-pressure hyaluronic acid lubricant and a preparation method thereof. The low-osmotic-pressure hyaluronic acid lubricant disclosed by the invention is prepared from the following materials in parts by weight: 88.35 to 92.97 parts of purified water, 4 to 6 parts of modified polyvinyl alcohol, 2 to 5 parts of 1, 2-propylene glycol, 0.1 to 1 part of sodium hyaluronate, 0.01 to 0.1 part of aloe extract, 0.01 to 0.1 part of snail stock solution, 0.01 to 0.1 part of herba centellae extract, 0.05 to 0.06 part of phenoxyethanol, 0.45 to 0.55 part of ethylhexylglycerin and 0.01 to 0.03 part of lactic acid. The lubricant obtained by the preparation method disclosed by the invention can effectively improve the lubricating property and prolong the service life; by means of accurately controlling the dosage and proportion of each component, optimizing the preparation process and the like, multiple advantages of low osmotic pressure, moisturizing and lubrication, skin friendliness, stability, safety and the like are realized, the requirements of different crowds can be met, and comfortable use experience is provided.

The invention relates to the field of epitaxial growth of thin film materials, in particular to a graphite boat and method for improving the quality of a liquid phase epitaxial thin film, the graphite boat comprises a bottom support, a sliding strip, a mother liquor tank and a sliding upper cover, the bottom support is of a surrounding structure and is used for supporting the sliding strip, the mother liquor tank and the sliding upper cover; the sliding strip is positioned in the bottom support and is used for loading a substrate; the mother liquor tank is positioned above the sliding strip, is positioned in the bottom support and is fixed with the bottom support; and the sliding upper cover is positioned above the mother liquor tank, is positioned in the bottom support and is used for sealing. The tellurium-cadmium-mercury thin film which is bright in surface and free of macroscopic ripples is prepared, the difficulty of a subsequent device process can be effectively reduced, a series of problems of interconnection failure, shading and the like caused by poor thickness uniformity are solved, and great contribution is made to improvement of device performance.

The invention discloses a surface nickel plating process for quartz glass, and aims to improve the adhesive force, uniformity and functional performance of a nickel plating layer, simplify the process flow and meet the environmental protection requirement. The process comprises the following steps: firstly, cleaning and roughening the surface of quartz glass, removing surface impurities through a 2% sodium hydroxide solution and a 10% hydrofluoric acid solution, and forming a microscopic rough structure; then treating in a sensitizing solution composed of stannous chloride and hydrochloric acid to enable the surface to adsorb stannous ions; then treating in an activating solution composed of palladium chloride and hydrochloric acid to form a catalytic active layer; then carrying out nickel plating reaction in a chemical nickel plating solution with the temperature of 85 DEG C and the pH value of 4.5, wherein the thickness of a plating layer is 5-10 microns; and finally, the waste liquid is neutralized and flocculated to realize environment-friendly discharge. The process is simple and convenient to operate, and the generated nickel coating is uniform and compact, has excellent conductivity and corrosion resistance, and can be widely applied to the fields of electronics, optics and chemistry.

The utility model discloses an epitaxial wafer and a long-wave emission optoelectronic device. The epitaxial wafer comprises a substrate main body, wherein a selected surface of the substrate main body is provided with a plurality of boss structures which are distributed at intervals; the filling structure layer comprises a plurality of first filling structures, and the first filling structures are correspondingly arranged on the top end faces of the boss structures; and the covering structure layer continuously covers the substrate main body and the filling structure layer, and the covering structure layer is also provided with a plurality of micropore structures. According to the utility model, the silicon nitride covering structure layer utilizes the nanoporous structure of the silicon nitride covering structure layer to reinforce the lateral epitaxy between the III-group nitride buffer layers, dislocation turns over the nanoscale microporous structure in the growth process, and the dislocation is prevented from extending upwards into the nitride light-emitting layer; the crystal quality of the nitride material is more effectively improved, the luminous efficiency of the epitaxial wafer is improved, and the problem of electric leakage of the epitaxial wafer is solved.

The invention discloses a silicon-based epitaxial wafer thickness uniformity control device and a control method, and relates to the technical field of epitaxial wafer processing, the silicon-based epitaxial wafer thickness uniformity control device comprises a workbench and a furnace body, the furnace body is fixedly arranged at the top of the workbench, the silicon-based epitaxial wafer thickness uniformity control device also comprises an air inlet part, the air inlet part is arranged at one end of the furnace body in a sealing manner, and the air inlet part comprises an air inlet flange. The invention further discloses a method for controlling the thickness uniformity of the silicon-based epitaxial wafer. The method comprises the following steps of wafer placing, furnace body pre-cleaning, epitaxial growth and wafer taking. Dust particles are accumulated at the bottom of the furnace body and attached to the side face of the partition plate in the epitaxial growth process, and the step of cleaning the interior of the furnace body is simplified; in the cleaning process, the interior of the furnace body is divided into two independent closed cavities, dust particles cannot diffuse upwards, the cleaning effect on the interior of the furnace body is guaranteed, meanwhile, the space needing to be cleaned is greatly reduced, the cleaning effect and the cleaning efficiency are improved, and the thickness uniformity of epitaxial wafers is improved.

The invention relates to the technical field of semiconductor manufacturing, in particular to a pore sample with large depth, and provides a method for observing a bottom structure by preparing the pore sample through a focused ion beam (FIB). According to the method, by means of filling special resin for ion thinning into pores, introducing an improved back-cutting technology and the like, the problems of pore structure deformation and large damage of focused ion beams to the interiors of the pores during sample preparation in the prior art are solved; the method has the technical effects that the stability of the bottom structure of the pore sample can be improved, and damage to the pore structure in the thinning process is avoided.

The invention provides a dry-method electrode pole piece film and a preparation method thereof, and belongs to the technical field of dry-method electrode manufacturing. The dry-method electrode pole piece membrane comprises active material particles, conductive agent particles and an adhesive, the adhesive is fibrous, the active material particles comprise large-particle-size active material particles and small-particle-size active material particles, the particle size D50 of the large-particle-size active material particles is 4-10 [mu] m, the particle size D50 of the small-particle-size active material particles is 0.9-1.8 [mu] m, and the particle size D50 of the conductive agent particles is 4-10 [mu] m. And the small-particle-size active material particles are distributed in areas close to and adhered to the adhesive along the extension direction of the adhesive. The dry-method electrode pole piece film has relatively good film forming property and relatively high compaction density.

The invention discloses a preparation method of an all-composite mast, which belongs to the technical field of ships and comprises the following steps: a, preparing a bottom flange; b, preparing a mast main body, and winding an inner skin on the mast main body; c, the bottom flange is assembled to the mast body, and the inner skin is pre-cured; d, the boundary dimension of the inner skin is machined, and the honeycomb core is bonded to the surface of the inner skin; e, stabilizing the honeycomb core, and winding an outer skin on the honeycomb core; f, carrying out integral curing treatment, and carrying out boundary dimension processing and finishing on the cured outer skin; and g, demolding. The bottom flange is prepared and formed by the composite material through the autoclave technology, the bottom flange is inserted into the mast body to be integrally formed, the bottom flange prepared through the technology is light in weight, high in strength, easy to machine and good in connecting performance with the mast body, the strength and stability of the connecting part are improved, and the number and complexity of connecting pieces are reduced.

The invention discloses a full-automatic PTEE film stretching and sintering machine and a stretching and sintering method, and relates to the technical field of PTEE film stretching and sintering machines, the full-automatic PTEE film stretching and sintering machine comprises a sintering and heating bin, conveying pieces, a film to be stretched, a first assembly, a second assembly and a third assembly, the conveying pieces are symmetrically arranged in an inner cavity of the sintering and heating bin, and the film to be stretched is located in the middle of the conveying pieces; the first assembly and the second assembly are located on the same vertical plane, and through the design of the stabilizing pipe and the pushing piece, solution conveying work can be completed when the first assembly and the second assembly work; the problem that whether the conveying device and the stretching device are not flush or not and consequently the thin film is stressed unevenly can be ingeniously monitored indirectly through movement of the push piece in the stabilizing pipe; the design of one group of parts with multiple functions obviously reduces the complex maintenance work and cost caused by the increase of the parts; the overall operation efficiency of the equipment is improved, and the production continuity is guaranteed.

The invention provides a display panel, a preparation method thereof and a mask plate, relates to the technical field of display, and improves the yield of a frame area of the display panel. The display panel comprises a display area and a frame area, the frame area is located on the periphery of the display area, and the display panel further comprises a substrate; the touch metal layer is located on one side of the substrate, the touch metal layer comprises a touch wire, and the touch wire extends from the display area to the frame area; the first optical layer is located on the side, away from the substrate, of the touch metal layer, the first optical layer comprises at least one groove, the groove is located in the frame area, and the orthographic projection of at least part of the groove on the substrate and the orthographic projection of the touch wire on the substrate are overlapped; at least part of the second optical layer is located on the side, away from the substrate, of the first optical layer, the second optical layer at least partially fills the grooves, and the edge line of the orthographic projection of the second optical layer on the substrate does not exceed the orthographic projection of at least one groove on the substrate.

The invention discloses a solar cell vertical electroplating device which comprises an electroplating process tank body, a rectifier, a spraying module, a plurality of solar cells and a plurality of anode plates, the solar cells are arranged and fixed on a carrier in a matrix mode, and a metal load is arranged on the periphery of each solar cell. The anode plates are uniformly distributed on the two insulating frames to form two anodes and are respectively arranged on two sides of the carrier, the insulating frames serve as anode shields between the adjacent anode plates, and the number of the anode plates in each anode is the same as the total number of the solar cells; the spraying assembly comprises a plurality of nozzles which are evenly distributed on the periphery of each anode plate, and outlets of the nozzles directly face one side of the carrier. According to the invention, by optimizing the electroplating device and process parameters, the preparation of the copper grid line with good thickness uniformity and line width of less than 10 microns is realized, and a rapid and effective solution is provided for further improving the photoelectric conversion efficiency of a solar cell and reducing the production and manufacturing cost.

The invention discloses a preparation method of a laser bar heat sink sheet with high thermal conductivity and low thermal expansion. The preparation method comprises the following steps: cutting a sheet-shaped artificial diamond into a laser bar heat sink sheet core material in a laser cutting manner; plating metal chromium or titanium on the surface of the core material by adopting a magnetron sputtering method, and coating a layer of active brazing metal on the surface of the core material to form a core material inner mold; a graphite die provided with a plurality of through hole arrays is adopted, and each through hole is provided with an upper graphite pressure head and a lower graphite pressure head; combining and coating the core material inner mold with a matched metal shell and a matched cover plate, then placing the core material inner mold in the through hole, and assembling an upper graphite pressure head and a lower graphite pressure head to form a template assembly; carrying out vacuum hot pressing sintering on the template assembly to obtain a laser bar heat sink blank, and grinding and polishing to obtain a laser bar heat sink finished product; according to the obtained product, the flaky artificial diamond serves as a core, copper or copper alloy is compounded on the surface, the overall heat conductivity of the product is further improved, meanwhile, the proper thermal expansion coefficient is guaranteed, the machinability is good, and the method is suitable for large-scale production.

The invention belongs to the technical field of sodium ion batteries, and particularly relates to a preparation method of a high-entropy sodium ion positive electrode material coated with nanoscale oxides, which comprises the following steps: (1) mixing a metal salt solution, a precipitator solution and a complexing agent solution, controlling the pH value of the reaction solution to be 9-11.5, and carrying out coprecipitation reaction to obtain a precursor solution; (2) aging, filtering, washing, drying and demagnetizing the precursor solution to obtain precursor powder; and (3) uniformly mixing the precursor powder with sodium salt and doped salt, calcining, taking out the molten material in the cooling process, directly quenching, and cooling to obtain the high-entropy O3 type positive electrode material, and (4) mixing the high-entropy O3 type positive electrode material with a nanoscale oxide, and calcining to obtain the nanoscale oxide coated high-entropy O3 type positive electrode material. The invention also provides application of the sodium ion positive electrode material. The sodium ion positive electrode material prepared by the method disclosed by the invention is high in stability and good in circularity in air.

This application belongs to the field of semiconductor processing technology, specifically relating to a backlight reflective layer printing device and its application. This application effectively controls the vibration generated during the printing process by optimizing the mechanical structure and position design of the frame, support plate device, and multi-axis spindle, reducing the deviation between the actual operating path and the planned path of the piezoelectric jet valve. This significantly improves the stability of the piezoelectric jet valve operation and the printing accuracy. Furthermore, this application, by setting up a micro-adjustment device, a positioning system, an inkjet calibration system, and a needle alignment device, and utilizing their coordinated relationship, can precisely correct printing parameters such as the jetting position or jetting volume of the piezoelectric jet valve. Therefore, based on the aforementioned stable printer body structure, the coating quality of the backlight reflective layer obtained by piezoelectric jet printing will be further improved. Thus, the backlight reflective layer prepared using this invention has better thickness uniformity and a better reflective effect.

The invention provides a stepping motor control method, device and equipment for a coating die head, and relates to the technical field of coating control, and the method comprises the steps: obtaining a first coating control parameter sent by an upper computer, a state parameter of a stepping motor at the current moment, and a two-phase current of the stepping motor in a two-phase static coordinate system; determining a control reference amount based on a deviation between the state parameter and the configured position control amount; according to the state parameters and the control reference quantity, converting the two-phase current under the two-phase static coordinate system to obtain two-phase voltage of the stepping motor under the two-phase static coordinate system; generating a second coating control parameter according to the two-phase voltage of the stepping motor under the two-phase static coordinate system; and based on the first coating control parameter and the second coating control parameter, a stepping motor of the coating die head is controlled to move at the next moment. According to the application, the upper computer is used for simultaneously controlling the stepping motor control system of the plurality of coating die heads through the CAN bus, so that the space utilization rate and the control precision of the stepping motors of the coating die heads are improved.

This invention discloses a foreign matter collection device and method for overflow-type down-drawing substrate glass furnaces, belonging to the field of flat glass manufacturing technology. The device provided by this invention includes a fixed tube, a collection tube, and a rotary drive mechanism. The collection tube is hinged to the inner end of the fixed tube within the furnace and consists of two symmetrical U-shaped grooves connected by a central rotating hinge shaft. The rotary drive mechanism drives the collection tube to rotate, so that when the central rotating hinge shaft faces downwards, the two grooves automatically open under gravity to form a U-shaped receiving groove, and when facing upwards, they automatically close to form a sealed circular tube. Using this invention, the process of removing foreign matter from the furnace for cleaning can avoid secondary pollution or safety accidents caused by scattering. The entire switching process is completed online outside the furnace without interrupting production or opening the furnace, completely solving the problems of large production losses and severe disturbances to the furnace temperature and airflow fields caused by the need to stop production for cleaning in traditional devices.

The invention provides a high-temperature polyamide cast film. The raw material of the high-temperature polyamide cast film comprises high-temperature polyamide resin. Therefore, the high-temperature polyamide cast film disclosed by the invention not only has excellent mechanical properties, chemical resistance, dimensional stability, thickness uniformity, high temperature resistance and the like, but also can be endowed with different functions, such as low oxygen permeability, uniform color, flame retardance and the like; the method has important significance in expanding the application of polyamide in the fields of packaging, automobiles, new energy and the like.

This invention provides a slurry brushing device. The device drives a brushing mechanism to move laterally above an operating table via a brushing moving component. A brushing preparation table and a substrate support are arranged on the upper surface of the operating table in the direction of the brushing mechanism's movement. A convex platform is provided on the brushing preparation table. During the brushing mechanism's movement, the bristles of the discharge cylinder roll against the surface of the convex platform and the substrate surface on the substrate support. This invention, through the convex platform, supplies slurry to bristles that are not fully covered. The bristles of the discharge cylinder are simultaneously penetrated by the slurry and rolled against the surface of the convex platform. The convex platform is large enough for the bristles of the discharge cylinder to roll around the entire surface, allowing the slurry at the discharge port to evenly penetrate the interior of the bristles under gravity. The process of the bristles being squeezed around the entire surface allows the slurry on the inner side of the bristles to better penetrate to the outer side, resulting in a more uniform and fine coating on the substrate surface.