73results about How to "Increase production cost" patented technology

The application provides a preparation method of a diphenylfluorene polyether. The method uses diphenylfluorene as a substrate, butylene oxide as an epoxide monomer, toluene as an organic solvent, and under the action of a composite catalyst, reacts at 110-200 DEG C for 2-6 hours to obtain the diphenylfluorene polyether. The composite catalyst is obtained by reacting a porous aromatic skeleton with a bromoalkyl quaternary ammonium salt to obtain a quaternary ammonium salt functionalized porous aromatic skeleton, and finally, a basic catalyst is limitedly encapsulated in the pore channel of the quaternary ammonium salt functionalized porous aromatic skeleton by electrostatic attraction. The catalyst of the method can be recycled and reused, and the yield retention rate is greater than or equal to 92% after the composite catalyst is used for 5 cycles, and the method is suitable for optical display, high-frequency circuit board, semiconductor packaging and other fields.

The utility model relates to a kind of kink manipulator, belong to mechanical equipment technical field, kink manipulator includes drive assembly, transmission assembly and torsion clamping assembly;The linear stroke of first arc guide slot in transmission assembly one end is less than the linear stroke of second arc guide slot;Torsion clamping assembly includes pivot, main shaft, mechanical claw and rack;Drive assembly rotates main shaft by transmission assembly;Pivot one end is connected with first arc guide slot by connecting piece, and the other end passes through main shaft and is coaxially connected with rack;Main shaft one end is connected with second arc guide slot by connecting piece, and the other end installs the fixed part of mechanical claw;Two pincers of mechanical claw are symmetrically engaged connection with the two sides of rack;Two pincers are rotated by rack and drive pivot rotation when rotating;Two pincers are realized clamping, opening by engagement transmission when pivot and main shaft telescopic movement.This utility model is high in repeat positioning accuracy, clamping force is controllable, avoid product deformation or breakage, packaging film has no loose, wrinkle phenomenon.

The invention provides a preparation method of gemcitabine hydrochloride, and belongs to the technical field of medicine synthesis. The preparation method of gemcitabine hydrochloride comprises the following steps: firstly, carrying out condensation reaction on a compound in a formula I and protected cytosine II to obtain a gemcitabine hydrochloride compound III; the method comprises the following steps: synthesizing a gemcitabine hydrochloride compound III (alpha / beta configuration mixture), splitting the synthesized gemcitabine hydrochloride compound III (alpha / beta configuration mixture), and carrying out configuration conversion on a key compound III (alpha / beta configuration mixture) in a splitting mother solution by adopting a continuous flow technology to realize recovery of an alpha configuration product, so that the purity and yield of the gemcitabine hydrochloride compound III beta are improved, and the method is suitable for industrial production. And thus, high-quality gemcitabine hydrochloride is obtained. The purity of the key compound is improved through resolution and configuration transformation, and the purity reaches 99.2% after resolution. The gemcitabine hydrochloride is prepared from the high-purity key compound III, so that the product purity is high; the product loss is reduced, and the product yield is improved.

The application relates to the technical field of metal molds, in particular to a stamping type manufacturing metal mold which comprises a mold base, a female die, guide columns, an upper mold base and a male die, wherein the female die is fixedly installed on the top wall of the lower mold base, a plurality of guide columns are connected to the four corners of the top wall of the lower mold base, the top portions of the guide columns are jointly connected with the upper mold base, the male die is installed on the bottom of the upper mold base, the male die is movably matched with the female die through the up-down movement of the upper mold base, and the male die is internally provided with a lubricating device for accurately supplying lubricating oil to the mold processing position. The lubricating device accurately supplies lubricating oil to the mold processing position, not only saving the use amount of the lubricating oil, but also improving the cooling and lubricating effect in cold forging stamping, avoiding the influence of the splashing of the lubricating oil on the normal work of other equipment, and reducing the production cost without the need of additionally installing other equipment.

The utility model relates to metal sheet processing equipment field, concretely is a kind of wire harness automatic connecting device based on uncoiling line swing shear die. Including swing shear die, height adjusting mechanism, support no.

The invention relates to chemical technology for producing high-purity magnesium oxide used in the pharmaceutical, cosmetic, and food industries, in the production of ceramics, glasses, optical materials, electronic materials, catalysts, polymer materials, transformer steel. High-purity magnesium oxide having a specific surface area, determined by the BET method, in the range from 5 to 70 m2 / g, an average particle size (d50), determined by laser diffraction, of not more than 5 µm, characterized in that it has a mass fraction of impurity elements of each of Pb, Cd, As, Hg of not more than 0.1 ppm, a mass fraction of impurity elements of each of Ba, Zn, Ti, Mn, Co, Mo, V, Sb, Sr of not more than 1 ppm, a mass fraction of impurity elements of each of Al, F of not more than 5 ppm, a mass fraction of impurity elements of each of P, Cr, Ni, K, Li of not more than 10 ppm, a mass fraction of Fe of not more than 50 ppm, a mass fraction of Si of not more than 0.01%, a mass fraction of impurity elements of each of Ca, B of not more than 0.02%, a mass fraction of sulphates SO42- of not more than 0.02%, a mass fraction of Na impurity of not more than 0.05%, a mass fraction of chloride impurity of not more than 0.05% and includes primary particles and agglomerates consisting of primary particles. High-purity magnesium oxide is obtained by calcination of magnesium hydroxide obtained by reacting a purified concentrated aqueous solution of magnesium chloride with an aqueous solution of sodium hydroxide in a continuous manner at a temperature of 40-90 °C, stirring at a speed of 20-300 rpm at a molar ratio of OH-:Mg++ ions within the range (1.9÷2.1):1 with the continuous supply of a suspension of magnesium hydroxide seed crystals into the reaction mass in an amount of 5-200% of the total mass of the supplied initial reagents, and the magnesium hydroxide seed crystals are pre-treated with a concentrated aqueous solution of magnesium chloride, after interaction of the reagents, a suspension of magnesium hydroxide is sent for aging at a temperature of 40-90 °C, then hydrothermal crystallization of magnesium hydroxide particles is carried out in the presence of dihydric alcohol: ethylene glycol or propylene glycol, at a temperature in the range from 120 to 220 ° C, pressure in the range from 0.1 to 2.3 MPa, and a duration ranging from 1 to 10 hours, the resulting suspension of magnesium hydroxide is filtered, washed, and calcination of magnesium hydroxide is carried out at a temperature of 700-1100 °C. The obtained high-purity magnesium oxide has high chemical purity, adjustable specific surface area, pore volume and pore size distribution, particle size distribution and activity.

This utility model relates to a stress relief device in the production process of steel wire rope, belonging to the technical field of steel wire rope production equipment. It includes a mounting base plate, a mounting back plate fixedly mounted on the top of the mounting base plate, a mounting frame fixedly mounted on one side of the mounting back plate, two mounting lugs fixedly mounted on each of the two inner sidewalls of the mounting frame in the vertical direction, a support arm rotatably mounted inside each mounting lug, a support shaft fixedly mounted on one side of each support arm, a guide wheel rotatably mounted on one end of each support shaft, and a stress relief assembly on one side of the mounting back plate. The stress relief assembly includes three vibration shafts rotatably mounted on one side of the mounting back plate. This stress relief device in the steel wire rope production process eliminates stress by winding the steel wire rope around the surfaces of the four guide wheels, forming a rectangular shape. The rotation of the vibration shafts drives the rotation of a vibration eccentric wheel, causing the steel wire rope to vibrate and thus eliminating stress on the steel wire rope.

The application belongs to the technical field of rubber additive synthesis, and particularly relates to a method for continuously preparing 4,4'-dithiodimorpholine. The method uses sulfur monochloride, morpholine, 32wt% liquid alkali (sodium hydroxide solution) and 120# solvent oil as raw materials, and generates 4,4'-dithiodimorpholine in a dynamic tubular reactor. After the reaction is completed, the material flowing out of the dynamic tubular reactor is collected, and the product is obtained through static layering, washing, filtering and drying. The method uses the dynamic tubular reactor for reaction, and the mass transfer and heat transfer efficiency are extremely high. The material is instantaneously and uniformly mixed, so that the morpholine and the sulfur monochloride are rapidly contacted and reacted, the reaction heat can be instantaneously removed, the optimal reaction temperature can be accurately maintained, the continuous production can be realized, the production capacity is greatly improved, the reaction time of the traditional kettle reactor is shortened from 2-7h to 10min, the raw material conversion rate is as high as 99% or more, and the goals of cost reduction and efficiency improvement, green safety are finally achieved.

The invention discloses an asymmetric runner integrated exhaust manifold of an automobile exhaust system and a cold start ignition control method, and relates to the technical field of automobile exhaust systems. The exhaust manifold and an engine cylinder cover are integrated, and the exhaust manifold comprises a manifold body, an asymmetric branch flow channel set, an integrated thermal coupling structure, a waste gas confluence cavity, a temperature collecting module and a sealing structure. The asymmetric branch runner group is adaptive to the exhaust characteristics of each cylinder, so that airflow interference and heat loss are reduced; the integrated thermal coupling structure conducts heat with cylinder cover waste heat through water jacket flow adjustment, and the waste gas temperature is increased; and the temperature acquisition module acquires temperature data in real time and transmits the temperature data to the ECU to realize closed-loop control. According to the cold start ignition control method, rapid ignition of the aftertreatment device is achieved through working condition recognition, temperature feedback, thermal coupling flow adjustment and air-fuel ratio and ignition advance angle cooperative adjustment. The problems that in the prior art, cold start ignition is delayed, emission exceeds the standard, and fuel economy is poor are solved, ignition time is shortened by 18-25 seconds, cold start emission is greatly reduced, and the method adapts to national sixth B and above emission laws and regulations and has good mass production feasibility and application value.

The utility model discloses an anti -theft type packing carton relates to carton packing technical field, including the box, the side of box is surrounded by pre -pressing the line of side plate, the upper along of side plate is provided with first roof, the surface of first roof is provided with easy tear strip and buckle, easy tear strip and buckle all adopt point break formula design, easy tear strip is provided with two easy tear lines in parallel, easy tear line's one end is provided with tear and pull head, the junction of buckle and first roof is provided with point break ring, the point break ring and easy tear line are connected through point break line.

The application discloses a preparation method of butyl acrylate. The butyl acrylate is prepared through esterification reaction of raw materials of acrylic acid and n-butanol. The acrylic acid includes acryloyloxypropionic acid, maleic acid and crotonic acid. The mass ratio of the acryloyloxypropionic acid to the maleic acid is 1:0.01-1, and the mass ratio of the crotonic acid to the acryloyloxypropionic acid is 1:5-500. The content of key impurities in the acrylic acid is ensured to be in a specific ratio, and the crude acrylic acid is directly used as a raw material for butyl acrylate production after removal of light components, so that the production cost of the butyl acrylate is greatly reduced, and raw material consumption and energy consumption are reduced. The application is a green and efficient production process.

The utility model discloses a wind deformation resistant dust collecting bag framework, which comprises a base frame structure, an adjusting frame structure is arranged above the base frame structure, the base frame structure comprises a bottom ring body serving as a foundation, a support with a hollow structure inside is fixed above the bottom ring body, an adsorption magnet is fixedly arranged inside the support, and the adsorption magnet is fixed on the bottom ring body. A reinforcing ring is fixedly installed on the surface of the support, the adjusting frame structure comprises a connecting rod, a supporting ring is fixedly installed above the connecting rod, a matching groove is formed in the surface of the connecting rod, an adjusting rod is fixedly installed at the bottom of the connecting rod, an adsorption block is fixedly installed on the surface of the adjusting rod, and the matching groove is matched with the matching block in a clamped mode. The matching block is fixedly installed on the inner side of an arc-shaped ring, a connecting groove is formed in one end of the arc-shaped ring, a connecting block is fixedly installed at the other end of the arc-shaped ring in an embedded mode, and the dust collecting bag framework resistant to wind power deformation plays a role in opening, installing and fixing through the arranged connecting rods.

The utility model discloses a movable tab flattening device, which is used for flattening a tab of a battery cell and comprises a flattening mechanism, the flattening mechanism comprises at least one flattening roller set, each flattening roller set slides above the battery cell through a sliding mechanism corresponding to the flattening roller set, each flattening roller set comprises a pressing roller, and the pressing rollers are arranged on the flattening roller set. When the compression roller rotates, the tabs are flattened through rolling pressure; the main roller is located below the battery cell, the two sides of the main roller are detachably installed on the fixing bases on the two sides respectively, and the main roller can move in the height direction of the fixing bases and is fixed through fixing pieces so as to adjust the distance between the main roller and the pressing roller, and then the main roller can adapt to pole pieces with different thicknesses. Therefore, the device can be conveniently moved on different battery production lines to meet the flattening requirements of tabs of different specifications and types, and through the sliding mechanism, the flattening parameters can be rapidly and accurately adjusted, the production efficiency and the product quality are improved, the flexibility is improved, the cost is reduced, and the product quality is improved.

The application discloses a layered bidirectional winding method and system suitable for a three-dimensional coil of a star simulator, and the winding method comprises the following steps: fixing and mounting a winding side mold layer on one of the outer circumferential side and the inner circumferential side of the winding area of a winding bottom mold in advance, the winding side mold layer is configured to be located at the same layer as a first layer coil of the three-dimensional coil of the star simulator, and no winding side mold layer is arranged on the other of the outer circumferential side and the inner circumferential side of the winding area. Taking the side of the winding side mold layer facing the winding area as a winding reference, a conductor to be wound is wound around the winding bottom mold from the winding reference side turn by turn until the winding of the first layer coil is completed, and a winding side mold layer is also fixed and mounted on the other of the outer circumferential side and the inner circumferential side of the winding area. The method provided by the application does not cause interference of other components to the conductor during winding, avoids friction or damage of turn-to-turn insulation of the conductor, and thus improves the winding quality.

The application relates to the field of lithium ion battery electrolyte additives, in particular to a high-yield synthesis method of high-purity tris(trihydrocarbylsilyl)borate, and the synthesis steps are as follows: first, urea and hexahydrocarbyldisilazane are reacted to prepare hexahydrocarbyldisilourea; second, boric acid and the hexahydrocarbyldisilourea are reacted to obtain tris(trihydrocarbylsilyl)borate crude product; third, the crude product is purified to obtain high-purity tris(trihydrocarbylsilyl)borate. The synthesis method provided by the application has the advantages of high reaction conversion rate and yield, high product purity, recyclable filter residue and solvent after reaction, reduced waste emission and green and environment-friendly process.

The utility model relates to titanium dioxide preparation device technical field especially relates to a device and preparation nanometer titanium dioxide of preparation titanogel. Include: reaction container, stirring mechanism, vortex disperser, set up in reaction container bottom, including turbine, perforated screen and umbrella -like diffusion head, for dispersing into liquid alkali and even injection titanyl sulfate solution in fine flow, interface, with vortex disperser connects, for conveying liquid alkali, through the vortex disperser of reaction container bottom realizes the even injection of liquid alkali, avoids local concentration too high, improves mixing efficiency, reduces particle agglomeration, ensures that titanogel particle size distribution is even, and further ensures that nanometer titanium dioxide particle size distribution is even, the core innovation of the utility model lies in the traditional top drop -wise mixing mode is innovated as bottom vortex injection mode, and the mixing dynamics characteristics of reaction liquid are fundamentally changed.

The utility model discloses an energy -conserving and environment -friendly cement kiln bypass air release system, including cement kiln, kiln tail smoke chamber and grate cooler, and kiln tail smoke chamber is connected with quenching cooler, waste heat boiler and dust remover in proper order through pipeline, and the outlet of dust remover is connected with the high temperature area of grate cooler through pipeline and communicates, and the quenching cooler includes casing and inner tube, and the casing inner wall and the inner tube outer wall in cooling chamber are all provided with helical half -pipe, and a plurality of helical coils are concentrically arranged in the cooling chamber, and the airflow passageways of two adjacent helical coils are staggered, and the center of inner tube is provided with the center gas pipe of lower end block, and a plurality of air injection holes are arranged on the center gas pipe, and the upper part in the inner tube is provided with the spray mechanism, and a plurality of upper gas pipes are arranged on the ring plate between the helical half -pipe on the casing inner wall and the outermost helical coil. In conclusion, the utility model has the advantages of high smoke and cold air mixing efficiency, good quenching effect, reducing the smoke production, energy -conserving and environment -friendly.

The utility model discloses a reel anti-reverse installation device for a reel placing shaft, which relates to the technical field of semiconductor packaging test, and comprises a reel placing shaft which comprises a base and a positioning shaft arranged on the base in a penetrating manner, and an elastic positioning piece capable of moving along the axial direction vertical to the positioning shaft is inserted into the side wall of the positioning shaft; the first end of the detection needle is arranged in the base and is elastically connected with the base, the second end of the detection needle extends out of the base, and the second end of the detection needle exceeds the part, located outside the base, of the elastic positioning piece in the axial direction of the positioning shaft; the locking block is arranged on the inner side wall, opposite to the elastic positioning piece, of the positioning shaft and is movably arranged in the axial direction of the positioning shaft; and the linkage piece is arranged between the detection needle and the locking block, and is used for driving the locking block to move to the lower part of the elastic positioning piece when the detection needle is in a pressed state so as to abut against the elastic positioning piece. The device can prevent a worker from reversely installing the reel, and the dependence on the installation experience of the worker is reduced.

The utility model provides a kind of improve nitrile latex recovery device.The improve nitrile latex recovery device includes: mounting bracket;Main rail, the main rail is installed at the top of mounting bracket, the top of the main rail is equipped with moving assembly, the top of the moving assembly is close to the position of front and back and is equipped with multiple movable structures, the bottom of each movable structure is equipped with mould seat;Mounting assembly, the mounting assembly is respectively installed at the front and back of main rail, one side of the mounting assembly is equipped with arc washer, and the bottom of each arc washer is provided with dust groove.The utility model provides the improve nitrile latex recovery device, by the design, namely adding washer this innovative initiative, utilize gravity effect to promote the centralized fling and recovery of excess latex, realize under the premise of not changing glove quality, improve the utilization of latex, increase the output of glove, finally reach the purpose of reducing unit product cost.

This utility model discloses a continuous temperature measurement system for molten iron in a blast furnace, comprising a main body, a first protective component, a second protective component, and a temperature measuring component. The first and second protective components protect the temperature measuring component from high-temperature corrosion and ensure that the temperature measuring component can accurately perform temperature measurement operations, thereby improving the reliability and service life of the system. By placing the temperature measuring component in the channel of the first protective component and extending the detection end of the temperature measuring component to the second protective component, the second protective component directly contacts the molten iron below the surface of the molten iron. Compared with traditional manual and non-contact temperature measurement methods, this system can more accurately reflect the actual temperature of the molten iron, providing a more reliable basis for temperature control in the blast furnace production process. The temperature measurement process does not require direct manual contact with the high-temperature molten iron, reducing the working time and potential risks of operators in high-temperature environments, improving the safety of the blast furnace tapping process, and providing a safer working environment for operators.

The utility model relates to the field of flexible ecological board drying equipment, in particular to complete drying equipment for processing flexible ecological boards for building decoration. Comprising a drying room body, a plurality of supports are arranged in the drying room body, a plurality of connecting frames are installed at the upper ends of the supports, auxiliary plates are fixedly connected to the interiors of the connecting frames and the interiors of the supports, auxiliary structures are arranged on the inner walls of the auxiliary plates, each auxiliary structure comprises two sliding grooves, and two sliding blocks are slidably connected to the inner walls of the sliding grooves; a clamping plate is fixedly connected to the upper surface of the sliding block, a connecting block is fixedly connected to one end of the clamping plate, and a fixing plate is fixedly connected to the end, close to the connecting block, of the auxiliary plate. The complete drying equipment for processing the flexible ecological plates for building decoration has the advantages that the plates of various sizes can be conveniently placed and dried, the plates can be conveniently and separately dried, and the plate drying efficiency is improved.

The present invention relates generally to ergonomically improving the stability and efficiency of a tape dispenser during a taping process. This is accomplished by moving the center of gravity toward the front end of the tape dispenser to the location of the main roller. This can be accomplished by placing the motor and gear components within the main roller of the tape dispenser. The operation of the tape dispenser (e.g., the taping and cutting process) is controlled by the direction of rotation of the motor and the interaction of the various components with the one-way bearings. The motor and gear components within the main roller drive the motorized cutting member, such that the production cost of the tape dispenser is reduced by utilizing the same motor and space is saved by eliminating the need for additional motors and gear components.

The application provides an acrylic resin composition for protective film, pressure-sensitive adhesive and protective film. The acrylic resin composition comprises, in parts by weight: 94-97.5 parts of acrylic ester copolymer, 0.9-1.9 parts of catalyst, 0.78-1.9 parts of curing agent and 0.9-1.9 parts of inhibitor; wherein the acid value of the acrylic ester copolymer is <0.5 mgKOH / g; and the viscosity of the acrylic ester copolymer is ≤100 mPa·s when the solid content is 35%. The application optimizes the formula of the acrylic resin composition for protective film, solves the key problems of the existing acrylic resin for protective film in application, including the dilution requirement before coating caused by high viscosity, the increase of the cost of using release film material caused by slow curing speed and insufficient cohesion, and the influence of the product appearance and performance caused by the residual adhesive layer after film peeling.

The utility model relates to a simple and stable display screen, which comprises a lower iron frame, an upper iron frame, a liquid crystal panel, a backlight module and a PCB (printed circuit board) component, the PCB component is mounted on the lower iron frame, a plurality of bumps for supporting the PCB component are arranged on the lower iron frame, one side of the backlight module is connected with the lower iron frame, and the other side of the backlight module is connected with the upper iron frame. The upper iron frame is arranged on the edge of the liquid crystal panel in a pressed mode and connected with the lower iron frame in a buckled mode. The utility model has the beneficial effects that the reliability can be improved, the production cost can be reduced, and the production efficiency can be improved.

This invention provides an ammonia oxidation device for ammonia desulfurization, belonging to the field of ammonia desulfurization technology. It includes a support frame, with an ammonia addition mechanism, a processing mechanism, and an oxidation mechanism fixedly installed on the top surface of the support frame. The generation of large-particle crystals reduces crystal adhesion and blockage within the equipment, lowering maintenance costs and operational failure rates. This invention separates the ammonia addition point from the oxidation tank, establishing an independent ammonia addition tank, thus completely separating the ammonia addition and oxidation processes. The ammonium sulfite solution in the absorbent after ammonia addition can better react with SO₂ in the flue gas during absorption, avoiding the problem of uneven stratification between the absorbent and oxidation liquids in traditional integrated ammonia oxidation devices. This significantly improves SO₂ absorption efficiency, effectively reducing the SO₂ emission concentration in the flue gas and meeting increasingly stringent environmental protection requirements.

The utility model discloses a stamping blanking device of set bending forming function relates to metal processing technical field, including lower mould subassembly, bending seat and bending pressing plate, the equal interval arrangement of two ends of lower mould subassembly installs bending seat, and the equal interval arrangement of left and right two ends of lower mould subassembly installs buffer seat, upper mould subassembly is connected in the bottom of upper mould subassembly. The stamping blanking device of set bending forming function, through the equal interval arrangement of two sides of public mould seat symmetry each installation three bending seats, cooperate the bending pressing plate of upper mould subassembly bottom connection, make outside hydraulic device to the vertical depression of upper mould subassembly, can provide synchronous push down force to bending pressing plate, with upper mould subassembly and lower mould subassembly butt joint, realize stamping processing to work piece, and bending pressing plate will also butt joint with bending seat, cooperate the cooperation between structure, can realize the bending effect to the edge of work piece, to guarantee processing efficiency.

This utility model discloses an energy-saving pneumatic control cylinder, relating to the field of installation equipment technology. The energy-saving pneumatic control cylinder includes a cylinder and an air inlet (A-type) located at the top left side of the cylinder. This utility model utilizes a sealing mechanism. An inner rubber ring is installed inside the adapter pipe, with its front end inside and its rear end exposed. An outer rubber sleeve is then inserted through the rear end of the inner rubber ring and installed outside the adapter pipe. A sealing clip is then used to clamp the outer rubber sleeve. The sealing ring inside the clip wraps around the inner outer rubber sleeve, achieving a seal and facilitating the disassembly and replacement of the air supply pipe, thus saving energy. This avoids relying on simple sealing methods, which can easily lead to gas leakage, wasting compressed air, weakening the cylinder's output power, affecting the normal operation of the equipment, increasing energy consumption, and raising production costs for enterprises.

The utility model discloses an embossing heating device which comprises a heating part and a heating part, each roller extends in the first direction and can rotate with the first direction as the axial direction, in the second direction, the multiple rollers and the heating part are arranged at intervals, in the third direction, the multiple rollers are arranged at intervals, the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction; the first supporting pieces are arranged in the third direction, each first supporting piece is arranged in the interval between every two adjacent rolling wheels so as to form a supporting face, and the supporting faces are used for supporting outside artificial leather; and in the first direction, the two ends of each rolling wheel are rotationally connected with the fixing piece, and the two ends of each first supporting piece are connected with the fixing piece. According to the utility model, the first supporting piece is arranged between the two adjacent rollers, and the first supporting piece supports artificial leather, so that the base cloth at the edge is prevented from falling and sinking into a gap between the rollers due to heating and softening.

The application provides a multilayer ceramic electronic element, an electronic circuit board and a preparation process and application thereof. The multilayer ceramic electronic element comprises a first insulating medium layer, a multilayer ceramic layer and a second insulating medium layer which are sequentially stacked; the multilayer ceramic electronic element comprises a through hole which penetrates the first insulating medium layer, the multilayer ceramic layer and the second insulating medium layer, or the through hole penetrates the multilayer ceramic layer and the second insulating medium layer; the through hole of the second insulating medium layer is provided with a tin solder ball; the multilayer ceramic layer is composed of a plurality of composite layers; the composite layer comprises a ceramic green sheet, a circuit layer and a resin layer which are sequentially stacked. Through the design of the structure of the multilayer ceramic electronic element, a plurality of ceramic green sheets can be laminated and compounded to obtain the multilayer ceramic electronic element at a lower temperature and pressure, and the great energy loss and the increase of production cost caused by the sintering process are avoided.

The invention discloses a method for preparing quinone compounds through direct oxidation of phenol by using oxygen as an oxidizing agent under the catalysis of copper. According to the method, under the condition of room temperature, in an organic solvent, copper chloride dihydrate (CuCl2. 2H2O) and nitrogen oxide are used as catalysts, oxygen is used as an oxidizing agent, and phenol is directly oxidized to generate the quinones compounds. The method has the advantages of simple and safe operation, cheap and easily available catalyst and raw materials, mild reaction conditions, excellent yield, good compatibility of substrate functional groups, environment-friendly reaction process, meeting of green chemical requirements and the like, and has industrial application prospects.