130 results about "Automotive coating" patented technology

The invention discloses a synergistic compound light stabilizer for an automobile coating and a preparation method of the synergistic compound light stabilizer, and belongs to the technical field of coating additives. The light stabilizer comprises the following components in percentage by mass: 30-50% of a hindered amine light stabilizer, 20-40% of an ultraviolet light absorber, 5-15% of surface modified nano cerium dioxide, 5-10% of a hyperbranched polyester anti-migration aid and the balance of a solvent, wherein the ultraviolet light absorber is a mixture of benzotriazole and triazine in a mass ratio of (1: 1)-(1: 3); the particle size of the nano cerium dioxide is 10-50nm, and the surface of the nano cerium dioxide is coated with a silane coupling agent; the preparation method comprises the following steps: modifying the surface of nano cerium dioxide, shearing and dispersing multiple components at a high speed, and adjusting and filtering a solvent; the weather resistance of the automobile coating is remarkably improved and the service life of the automobile coating is remarkably prolonged through the synergistic effect of a plurality of light stabilizing components and the combination of the photocatalytic degradation capability of the nano cerium dioxide and the anti-migration characteristic of the hyperbranched polyester.

The invention relates to the technical field of color paste, in particular to high-transmittance blue paste for an automobile color-changing film and a preparation method of the high-transmittance blue paste. Comprising the following components in percentage by weight based on the total weight of the preparation in each case: 15 to 30 weight percent of blue organic pigment, 5 to 15 weight percent of cellulose acetate butyrate, 5 to 15 weight percent of nano titanium dioxide, 5 to 20 weight percent of aldehyde resin, 10 to 20 weight percent of dispersing agent, 10 to 30 weight percent of ethyl acetate and 10 to 25 weight percent of methyl isobutyl ketone, wherein the sum of the weight percentages of all the components is 100% by weight. The nano titanium dioxide is added, specifically screened pigment and formula are combined, a novel dual-power centrifugal sand mill is introduced, the high-transparency blue paste with the color paste particle size being 50 nanometers and the transparency and color saturation being similar to those of special color paste for automobile paint is produced, better effect pigment arrangement can be provided in a color changing film, and the color changing effect is good. And the anti-mist and higher metal flickering effects are achieved.

The invention discloses a water-based wear-resistant automobile coating and a preparation method thereof, and belongs to the technical field of automobile coatings. By adding the modified silicone oil to modify the fluorine-containing acrylic resin, the toughness of the coating can be improved by the flexible chain segment of the organic silicon, so that the coating can better absorb energy and reduce the formation and expansion of cracks under the action of external force, thereby improving the wear resistance; the organic silicon modified fluorine-containing acrylate emulsion can form a compact protective layer on the surface of the coating, the protective layer can reduce the interface friction coefficient, the wear-resistant filler is added and uniformly dispersed on the surface of the organic silicon modified fluorine-containing acrylate, and wear caused by friction is reduced; meanwhile, the epoxy resin is subjected to toughening modification, and the impact resistance of the coating can be improved while the hardness of the coating is improved through the synergistic effect of the two components, so that the coating is unlikely to be damaged when being impacted by external force, and the wear resistance is improved.

The present invention relates to a conductive silver paste for automotive coated glass and a preparation method thereof, belonging to the technical field of functional glass. The conductive silver paste comprises the following components and weight contents: 50-80% of flaky mixed silver powder; 5-10% of spherical silver powder; 2-10% of organic resin; 8-45% of organic solvent; and 0.5-2% of organic additive. The preparation method comprises: firstly mixing the organic resin with the organic solvent to obtain an organic carrier; then mixing and dispersing the flaky mixed silver powder, the spherical silver powder, the organic additive, and the organic carrier to obtain the conductive silver paste. Compared with the prior art, the present invention effectively solves the problems of low resistance, adhesion, wide sintering window, and bonding strength between the silver paste and the copper foil.

The invention discloses a preparation method of a high-cycle-resistance water-based aluminum pigment, relates to the technical field of chemical materials, and aims to improve the cycle resistance of the aluminum pigment, and the preparation method comprises the following steps: adding silver type aluminum pigment slurry into a double-jacket reactor, dispersing with isopropanol, and stirring to obtain an aluminum pigment suspension; coating the surface of the aluminum pigment with a flexible organic polymer; and then carrying out secondary coating by using a rigid silane coupling agent. The invention further discloses the high-cycle-resistance water-based aluminum pigment prepared by the method and application of the high-cycle-resistance water-based aluminum pigment in automatic spraying of water-based automobile paint. According to the invention, a double-layer or even multi-layer coating system is adopted, the inner layer coats the aluminum pigment core with a flexible organic polymer such as polyvinyl butyral, the outer layer coats the aluminum pigment core with a rigid silane coupling agent, the inner layer provides buffering, the outer layer enhances protection, and the inner layer and the outer layer have a synergistic effect, so that the prepared pigment has very high deflation stability and mechanical stability; and the shear resistance is high.

The invention belongs to the technical field of automobile coatings, and particularly relates to an automobile original factory exterior decoration water-based black paint and a preparation method thereof. The invention provides automobile original factory exterior decoration water-based black paint. The automobile original factory exterior decoration water-based black paint is prepared from components in parts by mass as follows: 25-50 parts of water-based polyurethane resin, 5-15 parts of water-based polyester resin, 1-5 parts of amino resin, 0.5-1 part of a first wetting agent, 0.1-0.5 parts of a defoaming agent, 3-5 parts of a thixotropic agent, 3-10 parts of a solvent, 10-20 parts of water-based black slurry, 1-3 parts of a pH regulator, 1-3 parts of a functional aid and 20-30 parts of water. The functional auxiliary agent comprises polyethylene glycol and diacetone acrylamide. The automobile original factory exterior decoration water-based black paint provided by the invention has excellent comprehensive properties such as excellent high-speed shearing resistance, stable construction performance, high-pressure water gun flushing resistance, boiling resistance, excellent heat storage performance, acid resistance, alkali resistance, gasoline resistance, diesel oil resistance, engine oil resistance, high-speed shearing resistance, water resistance, excellent adhesive force and the like.

The invention belongs to the technical field of automotive coatings, and particularly relates to finishing-free water-based plain finish paint and a preparation method thereof. The water-based blocked isocyanate and the water-based hydroxyl acrylate are crosslinked to form a carbamate bond and construct a three-dimensional hydrogen bond network, so that the mechanical strength, the sagging resistance and the chemical resistance of the finish paint are remarkably improved; amino resin is modified through dialdehyde lignin, hydrophilic groups in the amino resin are eliminated, reversible imine bonds are generated, and the acid-base hydrolysis resistance of the finish paint is enhanced; the polyether-polysiloxane is grafted with the water-based blocked isocyanate, so that the storage stability of the finish paint is ensured, the sagging phenomenon of a vertical surface is inhibited, the surface tension of the finish paint is reduced, orange peel is eliminated, and the integrated performance improvement of high weather resistance, sagging resistance and low orange peel of the finish paint is realized.

The invention discloses a preparation method of hydroxy acrylic resin and the hydroxy acrylic resin, and belongs to the field of paints.The preparation method comprises the following steps that S01, a monomer and part of an initiator form a mixed solution, an initiator solution and a terminator solution; s02, adding materials; s03, dropwise adding the mixed solution; s04, dropwise adding an initiator solution; s05, terminating the reaction; and S06, filtering to obtain a hydroxy acrylic resin product. The method disclosed by the invention is environment-friendly, and the prepared hydroxy acrylic resin is applied to automobile coatings and has the advantages of higher hardness, scratch resistance, high gloss and quick drying.

The invention provides a preparation method of water-based environment-friendly bio-based automobile finish paint, and belongs to the technical field of automobile paints.The preparation method comprises the following steps that S1, a water-based bio-based acrylate modified polyester dispersion is synthesized; s2, preparing a thixotropic agent; s3, mixing and homogenizing finish paint components; the water-based bio-based acrylate modified polyester dispersion, amino resin, color paste, a thixotropic agent, diethylene glycol monobutyl ether, ethylene glycol monobutyl ether, a wetting agent, a flatting agent and pure water are adopted as raw materials to prepare the finishing paint; the finish paint produced by the method not only has strong adhesive force, but also has good hardness, strong flexibility and impact resistance. Meanwhile, due to the adoption of the water-based environment-friendly bio-based resin, emission of harmful volatile matters can be effectively avoided, and dual improvement of environmental protection and commodity performance is realized.

The invention relates to a non-polar thermoplastic plate with a polar surface coating as well as a preparation method and application of the non-polar thermoplastic plate, and belongs to the technical field of automobile coatings. The problems that in the prior art, in the process of attaching a paint film to the surface of a non-polar thermoplastic plate, a base material is prone to thermal stress or deformation, the paint film is uneven in attachment and prone to falling off or peeling off, cost is high, process time is long, and industrialization is difficult to achieve are solved. According to the method, low-cost polyphenol and amine substances are used for spraying codeposition, and a particle coating with a certain thickness and roughness is formed on the surface of the non-polar thermoplastic plate by regulating and controlling the condition parameters of the spraying process, so that the adhesion capacity of the surface of a matrix is enhanced; the introduced active groups increase the surface polarity of the matrix and enhance the interface bonding between the matrix and the paint film; the particle coating is prepared at normal temperature, so that thermal stress or deformation caused by heating of a matrix is avoided; and by adopting the processes of adding a strong oxidant and spraying and codepositing, the modification time is greatly shortened, the working efficiency is improved, and the industrial production of the modified non-polar thermoplastic plate is promoted.

A method of producing a charred sludge material includes combining automotive paint sludge (APS) with a lignin to form an APS-lignin mixture and turning the APS-lignin mixture into char.

The invention relates to the technical field of automobile coatings, and discloses an environment-friendly impact-resistant water-based automobile coating and a preparation method thereof.The environment-friendly impact-resistant water-based automobile coating is prepared by taking 4-carboxyphenylboronic acid, diethanol amine and isosorbide as raw materials to initiate polymerization with itaconic acid-based unsaturated polyester, acrylic acid and the like; dispersing with light calcium carbonate and auxiliaries to obtain the environment-friendly impact-resistant water-based automobile coating. The isosorbide is used as an ideal bio-based monomer, has a rigid spiral ring structure of a V-shaped bridge ring, and can better disperse and absorb energy when being impacted, reduce stress concentration during impact and improve the impact resistance of a coating film; a cyclic borate structure in the environment-friendly alkenyl borate monomer can form a layer of compact protective film on the metal surface, so that the metal is effectively prevented from reacting with substances such as acid and alkali in the external environment; the prepared water-based paint is low in VOC content, free of organic solvent residues and good in industrial application prospect.

The invention relates to the technical field of automobile coating testing, in particular to an automobile coating wear resistance tester and a testing method, and the automobile coating wear resistance tester comprises a testing platform, a testing mechanism and a locking unit. According to the invention, a plurality of different comparison groups are arranged by adding the test stations, and different grinding head materials and different acting forces applied by the grinding heads are taken as references, so that the wear condition of the automobile coating under the real condition is simulated, the authenticity of the test result is improved, and the test efficiency is improved by simultaneously testing and comparing the plurality of stations; according to the technical scheme, the complex processes of repeatedly replacing the grinding head for multiple times, applying different downward pressure and repeatedly testing for multiple times are omitted, then, multiple stations can be arranged for simultaneous testing according to testing requirements, simultaneous locking of all the stations is completed through the locking unit, and the testing efficiency and the convenience of the testing process are improved.

The invention relates to the technical field of solvent filtering processing, in particular to an automobile coating solvent filtering system. Comprising a support; a tank body is fixedly mounted on the supporting frame, a filtering mechanism is arranged in the tank body, an overturning part used for overturning a filter bag into a cylinder for cleaning is arranged on the tank body, a cleaning part used for removing impurities in the cylinder is arranged in the cylinder, and a driving part used for driving a sliding ring and a disc to synchronously rotate is arranged on the tank body; a conveying part for conveying a solvent into the filter bag and inflating the filter bag is arranged in the cylinder; according to the filtering mechanism, the driving part drives the filter bag to rotate, and meanwhile, gas is filled into the filter bag to assist filtering, so that the filtering efficiency of the filter bag is improved; and secondly, the filter bag can be turned over through the turning-over part, so that impurities on the filter bag can be conveniently cleaned, disassembly is reduced, the filtering efficiency is further improved, the maintenance cost is reduced, and the service life of equipment is guaranteed.

The invention relates to the technical field of automobile coating testing, in particular to an automobile coating adhesion performance testing machine and a testing method.The automobile coating adhesion performance testing machine comprises a base, a limiting block used for limiting a sample plate is fixedly installed on the upper end face of the base, an n-shaped frame located above the limiting block is fixedly installed on the upper end face of the base, and a downward pressing mechanism is arranged on the n-shaped frame. A limiting, cutting and adhering integrated operation model is adopted to complete cross-grid testing of different intervals of the automobile coating sample plate, an efficient, accurate and standardized testing process is achieved, uniform pressure control ensures that the cutting depth and force of grids with different intervals on the surface of the sample plate are consistent, and a base material is prevented from being damaged; the testing efficiency is greatly improved through cross-shaped limiting and synchronous cutting, it is ensured that the angle of each grid is accurate to be 90 degrees, meanwhile, coatings with different hardness and thicknesses can be easily coped with only by adjusting the pressure, the operation consistency is remarkably enhanced in the automatic adhesive tape adhering and tearing process, and the testing quality and efficiency are comprehensively improved.

The invention discloses an anti-aging bronze powder pigment and a preparation method and application thereof in the technical field of bronze powder pigments, and the anti-aging bronze powder pigment takes copper-zinc alloy as a base material, and is sequentially connected with a composite chemical passivation layer, a functionalized organic-inorganic hybrid compact barrier layer and a surface super-hydrophobic layer through chemical bonding from inside to outside; wherein the composite chemical passivation layer is formed by treating a passivation solution containing phytic acid, ammonium metavanadate and sodium tungstate; the functionalized organic-inorganic hybrid compact barrier layer is constructed by a silane mixed solution containing 3-mercaptopropyltriethoxysilane, a reaction type ultraviolet light absorber Si-BP, a reaction type hindered amine light stabilizer Si-HALS and tetraethyl orthosilicate through a sol-gel process. Through the design of a multi-layer composite system, the aging resistance of the bronze powder is improved, and meanwhile, the optical decoration performance can be reserved to the maximum extent, so that the dual strict requirements of high-end outdoor applications such as automobile coatings on durability and visual texture can be met.

The invention discloses a high-adhesion water-based paint and a preparation method thereof, and belongs to the technical field of water-based paints. Comprising the following steps: mixing and dissolving catechol modified acrylic acid of which the end group is amino, a flexible ester monomer, aldehyde olefin and an organic solvent, adding a free radical initiator, and heating for reaction to obtain a modified polyacrylic acid mixture; mixing, stirring and emulsifying the modified polyacrylic acid mixture, an organic silicon flatting agent solution, a compound emulsifier and deionized water to obtain the water-based paint with strong adhesive force. According to the bionics principle, a catechol derivative is introduced into an acrylic monomer, and strong adhesion to an automobile base material is realized through a polymer net structure formed by strong hydrogen bond crosslinking, metal coordination and other actions of the catechol derivative; and amino groups and aldehyde groups on the modified polyacrylic acid polymer can be crosslinked to form a dynamic imine structure, so that the high-temperature resistance of a coating film formed after the coating is coated is improved, and the functions of self-repairing and strong adhesion are realized.

The invention discloses 1K varnish as well as a preparation method and a spraying method thereof, relates to the technical field of automobile coating varnish, and solves the problems that the existing 1K varnish is difficult to be matched with a water-based colored paint system and is poor in performance. Comprising acrylic polyol, a thermosetting hydroxylated acrylic copolymer solution, thermosetting hydroxylated acrylic resin, polycarbonate diol, amino resin, blocked isocyanate resin, a leveling agent, a catalyst, an aging aid, a wetting dispersant and a solvent. The amino resin comprises butylated amino resin and a trifunctional melamine cross-linking agent; bYK306 and BYK358N are used as the flatting agents; the catalyst comprises an acid catalyst and a metal catalyst; the aging auxiliary agent comprises an ultraviolet light absorber 80 and a light stabilizer uv-93; the wetting dispersant is BYK-161; the solvent is prepared from butyl acetate, DBE, ethyl ethoxypropionate, ethylene glycol butyl ether acetate and n-butyl alcohol. The method is suitable for being matched with a water-based production line and is wide in applicability.

The invention discloses a color structural color film with a cooling characteristic. The thin film comprises a plurality of cascaded F-P cavities which are symmetrically arranged, and the specific structure is as follows: (MD) nM (DM) n. Wherein M represents a metal layer, D represents a dielectric layer, and MD and DM represent F-P cavities formed by the metal layer and the dielectric layer. The film system structure adopts an (MD) nM (DM) n (metal layer-dielectric layer-to-metal layer-to-dielectric layer-to-metal layer) symmetrical structure, and the structure is formed by cascading a plurality of F-P cavities. Each F-P cavity is composed of two metal reflectors and a medium layer in the middle, and regulation and control of interference light based on the Fabry-Perot cavity are achieved. The metal material shows high reflection characteristics in visible light and near-infrared bands, can effectively reflect most sunlight, is very useful for reducing heat absorption and improving energy efficiency, and can reduce dependence on an air conditioner and save energy especially in building and automobile coating.

The invention provides an automobile coating query method, which comprises the following steps: acquiring a full-surface image of a to-be-queried automobile, and determining the color complexity of the to-be-queried automobile based on the full-surface image; based on the color complexity of the to-be-queried automobile, matching a target feature extraction model corresponding to the color complexity in a model library; performing feature extraction on the full-surface image through a target feature extraction model to obtain appearance color features of the to-be-queried automobile; and querying paint data of the to-be-queried automobile in a paint database according to the appearance color characteristics. By introducing a color complexity evaluation mechanism, intelligent analysis of the full-surface image of the automobile is realized, and the most suitable feature extraction model is dynamically selected according to the analysis result, so that the color recognition accuracy is improved, the waste of computing resources is effectively reduced, the paint query time is greatly shortened, and the paint query efficiency is improved. And the overall automobile paint query efficiency is improved.

The invention discloses a functional radiation refrigeration coating and a preparation method thereof, and aims to overcome the defects that after a water-based coating is formed, the stability is low under ultraviolet irradiation, the adaptability to a humid environment is limited, and the radiation refrigeration performance is low. The preparation method comprises the following steps that firstly, silane modified zinc oxide dispersion liquid is prepared; mixing the silane modified zinc oxide dispersion liquid with a beta-cyclodextrin solution, and performing ultrasonic uniform dispersion; and then adding the uniform dispersion liquid into the aqueous polyurethane dispersion liquid, continuing to add the poly (N-isopropylacrylamide) dispersion liquid and the thickening agent, and fully stirring. And finally, uniformly coating a substrate with the modified waterborne polyurethane dispersion liquid, and carrying out heating treatment to prepare the multifunctional radiation refrigeration coating. The waterborne polyurethane material obtained by the preparation method can be widely applied to the fields of automobile coatings, energy-saving coatings and the like.

The utility model discloses a premixing device for automobile coating production, which belongs to the field of coating production and comprises a premixing tank provided with a premixing stirrer, the top of the premixing tank is respectively connected with a premixing pigment feeding pipe and a premixing filler feeding pipe, and the bottom of the premixing tank is connected with a premixing material discharging pipe. The side parts of the premixing tank are respectively connected with a premixing resin feeding pipe and a premixing solvent feeding pipe, the premixing pigment feeding pipe is connected with the first tubular screw conveyer, the premixing filler feeding pipe is connected with the second tubular screw conveyer, the top of the premixing tank is also connected with an air outlet pipe, and the air outlet pipe is connected with a vacuum pump. The premix produced by the utility model is good in uniformity.

This utility model relates to the field of automotive painting auxiliary equipment technology, specifically an auxiliary trolley for installing an electrophoresis chamber for automotive pre-painting. It includes a power mechanism, a main frame of the trolley, kick plates, railings, limiting grooves, a railing door, a trolley positioning and locking mechanism, a patterned steel plate, and a lifting mechanism. The power mechanism is located on both sides of the main frame of the trolley. The railings are fixed along the four perimeters of the main frame, and the kick plates are fixed around the perimeter of the railings. A railing door is located on one side of the railing above one set of power mechanisms. Four trolley positioning and locking mechanisms are respectively located on the main frame of the trolley. Each railing corresponding to a positioning and locking mechanism has a limiting groove. The patterned steel plate is fixedly laid on the upper surface of the main frame of the trolley. The lifting mechanism is located inside the installation auxiliary trolley. This utility model allows for rapid movement and changes in the construction area, greatly shortening the work surface transfer time and improving installation efficiency. It is faster and more labor-saving than manual handling.

1. Name of the product of this design: Automobile paint packaging can. 2. Purpose of this design product: used to hold automotive paint. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention discloses an automobile ornament softwood surface coating, a preparation method and application, and relates to the technical field of automobile coatings, the automobile ornament softwood surface coating comprises the following specific components: a primer, a brush-off layer, a seal paint and a finish paint. Aiming at the structural defects and practical application requirements of the cork material, a multifunctional synergistic system of primer, brush-off layer, seal paint and finish paint is constructed; the nano flake mica and the nano montmorillonite form a labyrinth type water-blocking structure in the primer, the hyperbranched polyester and the nano cellulose construct a stable color wiping and developing system, and the organic silicon sealing layer is compounded with the hollow microbeads and the nano zinc oxide to realize light-weight heat insulation protection. And nano aluminum oxide and fluorine modified wax powder in the finish paint jointly enhance the wear resistance and scratch resistance of the surface, so that the overall weather resistance, adhesive force, damp heat resistance, aging resistance and mechanical stability of the cork are effectively improved on the premise of not sacrificing the natural touch of the cork. And a complete set of technical support and an industrialization foundation are provided for large-scale application of the cork material in automobile high-end ornaments.

The invention provides hydraulic coating equipment which comprises an automatic feeding device, a pressure supplying device and a skin constant-temperature and constant-pressure liquid pool, the automatic feeding device is used for taking and placing automobile coating products, and the pressure supplying device is used for pressing the automobile coating products in the skin constant-temperature and constant-pressure liquid pool. And the constant-temperature and constant-pressure liquid pool of the skin is used for providing constant temperature and pressure for the automobile coating product. Due to the fact that the automobile coated product is coated in the constant-temperature and constant-pressure liquid pool of the skin, the automobile coated product can be evenly heated through the constant-temperature characteristic of the liquid pool, and the bonding force of glue inside the automobile coated product can be improved. And meanwhile, the flexibility of the liquid pool can adapt to automobile coating products in various shapes, and the adaptability is wide.

The utility model provides a paint spraying system, and relates to the technical field of automobile coating. The paint spraying system comprises a static pressure chamber, a flow equalizing part, a paint spraying chamber and a processing device, the paint spraying chamber communicates with the static pressure chamber, an air pipe communicating with the static pressure chamber is arranged on the static pressure chamber, the flow equalizing part is used for equalizing air fed into the static pressure chamber, a plurality of filtering assemblies are arranged in the paint spraying chamber, and each filtering assembly comprises a box body and a plurality of filtering plates; the filter plates are sequentially connected end to end and are all arranged in the box body, an air inlet space used for receiving air with paint mist in the paint spraying chamber is formed between every two adjacent filter plates, the filter plates are used for filtering the air with the paint mist fed into the air inlet space, and the processing device is used for purifying the air filtered by the filter plates. According to the paint spraying system, the overall occupied space is reduced, and the application range of the paint spraying system is widened.

The invention discloses an automobile coating aging fine granularity calculation and fine granularity three-dimensional characterization method based on an Arrhenius formula. The method comprises the following steps: drawing a three-dimensional geometric model of an automobile; the method comprises the following steps: importing material characteristics of an automotive coating of an automobile into thermal analysis software, setting simulation condition parameters and selecting a basic solver; performing gridding division on the three-dimensional geometric model by utilizing gridding division software, and then completing simulation modeling; establishing an aging model of the vehicle coating based on an Arrhenius formula; sorting the temperature values and the received irradiation doses according to different moments, substituting the sorted temperature values and the received irradiation doses into an aging model, and calculating an aging coefficient value of the vehicle coating within cumulative time; displaying the aging coefficient values of all the test points on the vehicle coating as point cloud values to generate an aging coefficient distribution diagram; and based on the aging coefficient distribution diagram, in combination with actual measurement data of an outdoor exposure test, calculating a fitting relationship between the aging coefficient of the vehicle coating and the chromatic aberration value and a fitting relationship between the aging coefficient of the vehicle coating and the glossiness. The invention provides a quicker and more accurate evaluation means for material aging.

The invention relates to the technical field of automobile coating detection, and discloses a viscosity detection device and method applied to automobile interior trim part coating production, the viscosity detection device applied to automobile interior trim part coating production comprises a base, a viscometer mounted on the base, and a fixing frame fixedly mounted on the base, a hopper is arranged at the upper end of the fixing frame, a limiting barrel is axially arranged in the hopper, a flow guide rod is movably sleeved with the limiting barrel, a buoyancy barrel is fixedly connected to the lower end of the flow guide rod, and a plurality of slow flow layering pieces and a directional flow guide piece are arranged on the inclined face of the buoyancy barrel. The buoyancy cylinder is matched with the slow flow layering part, on one hand, the flow velocity of the coating can be reduced, and the coating is prevented from entraining air to enter the detection cup due to too high flow velocity, and on the other hand, the slow flow layering part enables the coating to form differentiated flow, generate shearing force and turbulent flow, extrude and promote bubbles to be separated upwards, so that original bubbles in the coating are discharged. The viscosity detection accuracy of the coating is improved.