131 results about "Automotive paint" patented technology

The invention discloses an improved automobile paint surface damage detection method based on RT-DETR. The method comprises the following steps: firstly, constructing a high-quality paint surface damage data set, performing data enhancement, and introducing a negative sample and an interference sample to improve the generalization ability and the interference resistance of a model; secondly, in a Backbone network of RT-DETR-ResNet18, an improved dynamic convolution hybrid module (DCMB) is introduced, and on the basis of an original structure, the sensing ability of a strong model to complex textures, edges and heterogeneous regions is optimized; and finally, adding a full-scale frequency attention structure (CSPO) into the Neck part to improve the identification capability of the model on a fine-grained damage region. Compared with the prior art, the method of the invention realizes high-precision detection of eight types of damages such as scratches, recesses and corrosion on the automobile paint surface through a deep learning technology, has the advantages of high detection speed, high accuracy and the like, can be widely applied to the fields of automobile maintenance, second-hand automobile evaluation and the like, and has a wide application prospect. And the automation level and the detection efficiency of automobile paint surface damage detection are obviously improved.

The invention relates to an automobile paint surface protective film agent and a preparation method thereof, and belongs to the technical field of automobile beauty. The automobile paint surface protective film agent is prepared from the following raw materials: amino functional polysiloxane, fluorine modified acrylic resin, epoxy modified organic silicon emulsion, functional filler, a surfactant, hydrophobic modified silicone oil, a brightening agent, a penetrating agent, a cosolvent and deionized water, and the raw materials are blended to prepare the automobile paint surface protective film agent. The functional filler is prepared by firstly carrying out surface modification on a polymer and then carrying out click chemistry on dodecanethiol on hydroxylated nano silicon dioxide, and the polymer is prepared by carrying out nucleophilic addition on poly (ethylene glycol) methacrylate Mn360, poly (ethylene glycol) methacrylate Mn500 and isophorone diisocyanate. The automobile paint surface protective film agent is high in film forming speed, a formed film layer has the characteristic of multiple effects, and meanwhile, the wear resistance is also very good.

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 discloses a defoaming agent for industrial automobile paint and a preparation method of the defoaming agent. The defoaming agent is prepared from the following raw materials in parts by mass: 20-40 parts of a star block polyether-siloxane copolymer; 10 to 25 parts of nano hydrophobic silicon dioxide aerogel; 30-70 parts of an alkylbenzene solvent (boiling point gt: 200 DEG C); 3 to 8 parts of epoxy group modified polyether siloxane; and 1 to 3 parts of polyether modified polydimethylsiloxane. The molecular weight range of the star block polyether-siloxane copolymer can effectively balance the defoaming property and compatibility, the siloxane chain segment of the star block polyether-siloxane copolymer destroys the elasticity of a foam film, and the siloxane chain segment cooperates with alkylbenzene to reduce local surface tension and accelerate foam rupture. The polyether chain segment and the siloxane chain segment have a synergistic effect, and the polyether chain segment adjusts hydrophilicity to adapt to different environments.

The invention discloses an anti-aging prediction method and system for an automobile paint surface protective film based on microelement analysis, and relates to the technical field of anti-aging evaluation of bonding materials, and the method comprises the steps: based on the automobile paint surface protective film, arranging a microcell spectrum probe array, and setting a multi-spectrum cooperative detection coordinate system; constructing a dynamic material degradation characteristic spectrum; meanwhile, a dynamic environment simulation cabin is configured, and an accelerated aging data set is obtained; and simulating a quantitative relation between a micro-element migration track and a mechanical property degradation rule, and carrying out cross-scale reverse prediction on the residual service life of the automobile paint surface protection film. According to the method, the technical problems that in the prior art, the micro element valence state distribution of the automobile paint surface protection film is difficult to accurately analyze, the residual service life prediction lacks a cross-scale analysis means, and the aging prediction accuracy is insufficient are solved, the micro element valence state distribution analysis of the automobile paint surface protection film and the cross-scale reverse prediction of the residual service life are realized, and the aging prediction accuracy is improved. And the aging prediction accuracy of the protective film is improved.

The utility model discloses an anti-splashing device for an automatic polishing mechanism of an automobile paint surface. The anti-splashing device comprises a fixing mechanism, a telescopic mechanism and a protective cover, the fixing mechanism is of a hollow structure, can surround the periphery of a polishing head of the automatic polishing mechanism for the automobile paint face in the circumferential direction and is fixedly connected with the polishing head. The protective cover is of a hollow structure and comprises a round pipe and a horn mouth which are connected into a whole. The telescopic mechanism comprises a fixed end and a movable end, and the fixed end is fixed on the outer wall of the fixed mechanism; the movable end is fixed to the protective cover and can drive the protective cover to do telescopic motion in the axial direction of the polishing head of the automatic polishing mechanism for the automobile paint face. According to the device, polishing dust and polishing liquid are effectively shielded, and meanwhile, enough space is reserved for a polishing working end when a polishing tool is automatically replaced or a polishing pad is infiltrated; and the device is good in combinability, simple, practical, efficient and safe.

The invention belongs to the technical field of automobile paint surface protective films, and particularly relates to an environment-friendly heat-insulating automobile paint surface protective film and a preparation method thereof. The environment-friendly heat-insulating automobile paint surface protective film comprises a protective film, a self-cleaning coating, a first TPU base material, a heat-insulating coating, a second TPU base material, a pressure-sensitive adhesive layer and a release film from top to bottom, the heat-insulating coating comprises the following raw materials in parts by mass: 100 parts of waterborne polyurethane resin emulsion, 15-25 parts of a fatty acid ester modified heat-insulating compound, 1-2 parts of an ultraviolet light absorber and 5-8 parts of an auxiliary agent; the heat insulation compound comprises glass fiber powder, hollow glass beads and nano rare earth oxide; the environment-friendly heat-insulating automobile paint surface protective film provided by the invention has the advantages of high light transmittance, good heat-insulating property, good ultraviolet resistance, good ductility and environment friendliness.

The application discloses a kind of automobile paint surface defect detection and polishing method and system, the method includes: offline processing: detection station offline collection point planning is carried out, and the trajectory of multiple detection mechanical arms is planned;Detection station offline collection point calibration is carried out, and the paint surface imaging acquisition component and the 3D positioning camera external parameter of detection station are offline calibrated;Polishing station polishing mechanical arm and polishing station 3D positioning camera hand-eye calibration are carried out;Online processing: paint surface defect detection is carried out, and defect attribute and defect position positioning are obtained;Defect three-dimensional coordinates and normal are transmitted to automatic polishing component by visual positioning mode, and the paint surface defect is polished by automatic polishing component.Processing is carried out.The system is used to execute the above method.The application has the advantages of simple structure, wide application range, high degree of intelligence, high detection and polishing efficiency, etc.

The invention discloses a paint mist filtering treatment device for an automobile paint spraying chamber, and belongs to the technical field of paint spraying waste gas treatment.The paint mist filtering treatment device comprises a rack, an adsorption part, a mounting column and a power part, a fixing barrel is arranged on the rack, the mounting column is rotationally arranged in the fixing barrel, and a gas inlet pipe and an exhaust pipe are arranged at the two ends of the mounting column correspondingly; according to the paint spraying device, the mounting column is driven by the power part to rotate, so that the position of the adsorption part is changed, the unused adsorption part automatically falls into a U-shaped groove of the mounting column from the material guide frame and is clamped by the two movable clamping parts after rotating by 120 degrees, and the adsorption part is clamped by the two movable clamping parts after rotating by 120 degrees; paint mist in the paint spraying chamber enters the adsorption part and then is adsorbed by activated carbon, so that the purification treatment effect is achieved, after the adsorption part loses efficacy, the installation column is driven to continue by 120 degrees, the installation column can fall off from the through groove in the lowest position, and the automatic replacement effect is achieved.

The invention discloses a composite cleaning agent for automobile paint maintenance based on a nanometer dry cleaning technology and a preparation method thereof, and belongs to automobile cleaning supplies. The composite cleaning agent comprises 8-12% of nano oxide, 15-22% of a surfactant, 12-18% of a natural maintenance component, 10-15% of a functional additive and the balance of a solvent carrier. According to the principle, nano silicon dioxide forms a three-dimensional network structure through a sol-gel method, and forms a compact hydrophobic layer on the paint surface under the synergistic effect of the nano silicon dioxide and polyhydroxy arylamine modified silicone oil. Quaternary ammonium salt groups in the modified silicone oil and metal ions on the paint surface generate electrostatic interaction, and the wiping force is reduced by 60% in cooperation with the ball effect of the nano silicon dioxide. The citric acid and the tea saponin form a composite chelating agent, the removal rate of inorganic stains such as rust and bird droppings reaches 98%, and meanwhile corrosion to aluminum parts is avoided.

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.

The invention discloses polishing powder for an automobile paint surface and a preparation method of the polishing powder. The preparation method comprises the following steps: preparing a mixed solution; preparing a roasting material from the mixed solution and pseudo-boehmite, wherein the specific surface area of the roasting material is 30-60m < 2 > / g; grinding the roasted material to obtain aluminum oxide slurry; adding a coupling agent and a dispersing agent into the aluminum oxide slurry, and reacting under a stirring condition to prepare mixed slurry; and carrying out post-treatment on the mixed slurry to obtain the polishing powder of which the particle size distribution D50 is in a range of 0.6-0.9 mu m and the particle size distribution D100 is less than 10 mu m. According to the preparation method of the polishing powder, the prepared polishing powder has good polishing performance, the surface smoothness of a polished automobile paint surface is improved, the polishing powder is easy to store and transport, and the production cost can be effectively reduced.

The present invention belongs to the field of machine vision technology, and specifically relates to a method and system for detecting automotive paint defects based on machine vision. The method comprises: determining the edge position of an automotive surface based on an image of the automotive surface; collecting light intensity values ​​of each wavelength at each position at different observation angles; setting observation angle weights based on the distances from the edge position to the corresponding directions of each observation angle within a local range of the non-edge position; and fitting the light intensity values ​​of the target wavelength at the non-edge position at different observation angles using a weighted least squares method; slicing a three-dimensional space based on the observation angle corresponding to the maximum light intensity value of the edge position at the target wavelength and the edge at which the edge position is located; fitting the light intensity values ​​of the target wavelength at each observation angle in the sliced ​​two-dimensional plane of the edge position; obtaining the actual color of each position based on the fitting results, and performing paint defect detection. The present invention eliminates the interference of light illumination and provides more accurate paint defect detection.

This utility model relates to the field of paint booth technology, specifically a fixing mechanism for an automotive paint booth. The mechanism includes a paint booth body with two safety doors hinged to its side walls. Two bases are installed on both sides of the paint booth body, arranged opposite each other. Two support frames are fixed to the top of each base, and connecting rods are fixed to the ends of the corresponding support frames. A first telescopic rod is fixed to the middle of each support frame, and a connecting shaft is hinged to the end of the first telescopic rod. A fixing plate is fixed to the end of the connecting shaft. Fixing the paint booth body to both sides with the fixing plate effectively reduces the overall structural instability caused by aging or damage after prolonged use, thereby increasing the overall stability of the paint booth body and reducing shaking or movement during long-term use, thus minimizing equipment damage caused by shaking.

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 a method for evaluating the rime fog resistance of an automobile paint film. The evaluation method comprises the following steps: putting a test sample plate coated with an automobile paint film into a container filled with distilled water, ensuring that one part of the automobile paint film is soaked in the distilled water and the other part of the automobile paint film is exposed in the air, performing heat preservation soaking at 40-60 DEG C for 30-60 minutes, and taking out the test sample plate; then keeping the soaking state, transferring the test sample plate and the container to a low-temperature environment of-20 DEG C or below, freezing for 24-48 hours, naturally melting after freezing or washing the frozen part with low-temperature water until the test sample plate can be taken out, and observing the appearance of a paint film of the test sample plate by eyes; and when the surface of the automobile paint film soaked in the distilled water is white, judging that the anti-rime-fog performance of the paint film is unqualified, and otherwise, judging that the anti-rime-fog performance of the paint film is qualified. According to the evaluation method, the rime fog resistance of the automobile paint film can be accurately evaluated, and potential paint film problems can be effectively pre-judged in time.

The invention discloses a durable hydrophobic automobile paint surface protective film and a preparation method thereof, and belongs to the technical field of protective films. The technical problem that the environmental protection standard cannot be met due to the fact that fluorine atoms are introduced into an existing hydrophobic coating and the use amount of a solvent is increased is solved. According to the technical scheme, the preparation method comprises the following steps: preparing a fluorine-containing polyurethane elastomer base film containing a fluorocarbon side chain, performing corona treatment on one surface of the fluorine-containing polyurethane elastomer base film, then coating an acrylate coating to obtain an acrylate coating, and compounding the other surface of the fluorine-containing polyurethane elastomer base film with a pressure-sensitive adhesive layer to obtain the durable hydrophobic automobile paint surface protective film. The automobile paint protective film has the beneficial effects that the intermolecular force is weakened at high temperature, the fluorocarbon side chain of the base film is driven by surface free energy to migrate to the surface of the coating, the hydrophobic effect of the surface of the automobile paint protective film is achieved, and the fluorocarbon side chain is limited by the base film, so that the durability of the hydrophobic performance is good.

The invention relates to a hydrophobic paint surface protective film in the technical field of automobile paint surface protection, and solves the problems of difficulty in coordination and unification of hydrophobic performance and self-repairing function and harsh activation conditions in the prior art. The protective film comprises a matrix layer and a hydrophobic layer, the matrix layer is composed of a polyurethane main chain and a hydrogen bond cross-linked network, the hydrogen bond cross-linked network is formed by hydrogen bond cross-linking of ureido and carboxyl, the content of the ureido is 7.5-8.5 mol%, and the content of the carboxyl is 3.5-4.5 mol%; the hydrophobic layer contains a perfluoroalkyl silane compound with the carbon chain length of C6-C12; a concentration gradient transition interface is formed between the matrix layer and the hydrophobic layer, and the thickness of the interface is 5-15 microns. The hydrogen bond dissociation degree of the protective film reaches 0.25-0.35 at 70-80 DEG C to activate the self-repairing function, and the hydrogen bond dissociation degree is less than 0.08 at 25-40 DEG C to maintain the hydrophobic property. The preparation method adopts gradient coating and staged curing treatment. Coordination and unification of hydrophobic and self-repairing functions are realized, the activation temperature is proper, and the repairing efficiency is high.

An adhesive film liner comprising (a) a polymeric layer having a first and a second surface, the second surface being opposed to the first surface; (b) a first release layer located on top of the first surface of the polymeric layer, the first release layer comprising at least one polyurethane acrylate oligomer and / or at least one polyurethane methacrylate oligomer; and (c) a second release layer located on top of the second surface layer of the polymeric layer, the second release layer comprising at least one acrylate polymer.

The invention discloses a preparation method of a two-dimensional iron oxide nanosheet, and belongs to the technical field of nano materials. The preparation method comprises the following steps: 1) dissolving FeCl3. 6H2O, hexadecyl triethyl ammonium bromide and polyethylene glycol in deionized water, mixing, and carrying out ultrasonic treatment; 2) adding sodium citrate to adjust the pH value, transferring into a tetrafluoroethylene reaction kettle, and carrying out a hydrothermal reaction; and (3) after the reaction is finished, centrifugally washing, dispersing a product into an ethanol solution containing a silane coupling agent, mixing and stirring, washing and drying to obtain the two-dimensional iron oxide nanosheet. According to the preparation method, CTAB is taken as a main template agent, polyethylene glycol is taken as an auxiliary guiding agent, Fe < 3 + > is induced to directionally grow into the ultrathin nanosheets through hydrothermal reaction, and the ultrathin nanosheets can be widely applied to the fields of high-end automobile paint, electronic display devices and the like.

The present invention relates to the technical field of automobile repair and polishing equipment, and specifically to an explosion-proof automobile paint repair dry polishing device and dry polishing method. The device comprises a processing box, a polishing machine, a polishing sheet and an exhaust pipe, and the processing box is provided with a sealed door. The device can adsorb the dust generated by dry polishing through a filtering and collecting mechanism, and then adsorb the dust through an electrostatic roller. At the same time, the electrostatic roller can be moved laterally and up and down by a driving motor and an electric push rod, thereby adsorbing dust at different positions and heights. When the adsorption is good, the dust on the surface of the electrostatic roller can be swept by an output motor and a brush roller. At the same time, the water pump can be started to spray water mist with multiple spray nozzles, thereby reducing the resin dust and placing it in a collection box, thereby classifying and storing the dust, which is convenient for the later collection of metal dust for recycling.

The utility model discloses an automobile protective film, in particular to an automobile paint surface protective film, which has a layered structure comprising a tetradecanoic acid modified SiO2 / hyperbranched PDMS (Polydimethylsiloxane) self-repairing coating, a TPU (Thermoplastic Polyurethane) base material layer, a pressure-sensitive adhesive layer and a release film layer which are compounded in sequence, wherein the tetradecanoic acid modified SiO2 / hyperbranched PDMS self-repairing coating is composed of a hyperbranched polysiloxane polymer coating and a tetradecanoic acid modified SiO2 deposition layer on the surface of the hyperbranched polysiloxane polymer coating. According to the utility model, the technical problem that the super-hydrophobic surface of the automobile paint protective film has a self-repairing function is solved. According to the super-hydrophobic surface with the self-repairing function, the contact angle of the super-hydrophobic coating is 152.61 degrees, the rolling angle of the super-hydrophobic coating is 1.9 degrees, the super-hydrophobic coating has excellent antifouling performance, scratches can be repaired through heat treatment for 2 hours at the temperature of 80 DEG C when the surface of the coating is damaged, and the super-hydrophobic coating has excellent self-repairing performance. In addition, the super-hydrophobic surface with the self-repairing function further has good weather resistance and mechanical stability.

The utility model discloses a detachable panoramic camera vehicle-mounted support assembly relates to camera vehicle-mounted support technical field, include: the sleeve, the end of sleeve rotationally connected with third hinged seat, the outside of sleeve is equipped with the frame, the bottom fixedly connected with first hinged seat of frame, the bottom rotationally connected with support rod of first hinged seat, the bottom rotationally connected with second hinged seat of support rod, the bottom of third hinged seat and second hinged seat all are fixedly connected with support plate, and drive first screw to rotate through rotating second knob, under the cooperation of first screw, first screw hole and first bearing seat, it is convenient to drive piston to go up and move, thereby realizes the vacuumizing, and the vacuum chuck is inhaled on the car paint surface, completes the fixed mounting to the component, and vice versa needs to be disassembled, and the second knob is rotated reversely, and the piston downlink movement is driven, can remove the vacuum state, has simplified the installation and dismounting process, and is convenient to dismount.

The application discloses an image data enhancement method and device based on automobile paint surface defect detection, and the method comprises the following steps: S1, using a CARP-GAN network to generate automobile paint surface defect data; S2, using a Med-BGauss image smoothing algorithm and a morphological algorithm to optimize the generated automobile paint surface defect data; S3, based on a cut-paste algorithm with random variable parameters, obtaining the finally generated automobile paint surface defect data set. The CARP-GAN network proposed in the application can generate a defect data set with more quantity, more diverse style and more real data through existing automobile paint surface defect data; the Med-BGauss image smoothing algorithm and the morphological algorithm proposed in the application can effectively optimize the generated automobile paint surface defect data, so that the work of separating the automobile paint surface defect and the background is easier; the cut-paste algorithm with random variable parameters proposed in the application ensures that only one defect picture is pasted into one paint surface background, and the coordinates of pasting each time are random and variable, so that the generated data is more diverse.

The invention discloses an anti-permeation automobile paint surface protective film and a preparation method thereof, and relates to the technical field of paint surface protective films. The anti-permeation automobile paint surface protective film comprises a transparent base film, and a first coating and a second coating which are sequentially arranged on the surface of the transparent base film, the first coating is formed by epoxy resin modified polyurethane coating, and the second coating is formed by graphene modified polyurethane coating. The preparation method of the anti-permeation paint surface protection film comprises the following steps: coating an epoxy resin modified polyurethane coating on one surface of a transparent substrate film, carrying out primary heating curing, and annealing to form a first coating; the surface is further coated with a graphene modified polyurethane coating, secondary heating curing, ultraviolet irradiation and drying are carried out, and a second coating is formed; the anti-permeation automobile paint surface protection film is obtained. The automobile paint surface protective film prepared by the invention has excellent wear resistance, tensile strength and permeability resistance while ensuring the light transmittance, thereby having an excellent protective effect.

The utility model relates to the technical field of paint film detection devices, and discloses an automobile paint film quality detection device which comprises a mounting seat plate, and a deformable elastic block is detachably mounted below the mounting seat plate; the supporting structure is arranged below the elastic block, is used for fitting the bending of the workpiece and detecting a paint film, and comprises guide pipes, contraction grooves and a detection head, the elastic block is fixedly provided with a plurality of guide pipes, the guide pipes are provided with a plurality of contraction grooves, and the guide pipes form a corrugated structure capable of radially contracting through the contraction grooves; the circumferential surface of the guide pipe forms a corrugated structure through a plurality of shrinkage grooves, the movement range of the detection head can be greatly expanded to adapt to the concavo-convex of the automobile part by matching with the elastic block capable of elastically deforming, and the guide pipe can form multi-point support for the bottom of the elastic block on the basis of ensuring the deformation capability of the bottom of the elastic block; and the paint surface thickness detection precision of uneven positions is not lost.

The present invention relates to the technical field of automotive paint testing, and specifically to a wear resistance tester and testing method for automotive paint, including a testing platform, a testing mechanism, and a locking unit. By increasing the number of testing stations and setting multiple different comparison groups, the present invention simulates the wear conditions of automotive paint in real situations with reference to different grinding head materials and different applied forces of the grinding head, improving the authenticity of test results. Moreover, by simultaneously testing and comparing multiple stations, the testing efficiency is improved, eliminating the cumbersome processes of repeatedly replacing grinding heads, applying different downward pressures, and conducting multiple repeated tests. Secondly, according to testing requirements, multiple stations can be set to conduct tests simultaneously, and all stations can be locked simultaneously through the locking unit, improving the testing efficiency and the convenience of the testing process.

The invention discloses a method for detecting the scrubbing resistance of an automobile paint film to a car washer. The detection method comprises the following steps: carrying out scratch treatment on the surface of a paint film until an electrophoresis layer is exposed, so as to obtain a test sample plate; obliquely inserting the test sample plate into the mortar solution, enabling the mortar solution to submerge the whole test sample plate, and fixing the position of the test sample plate without deviation; stirring is started, and the paint film condition is observed and tested after stirring is conducted for a period of time. According to the detection method, the paint film abrasion processes such as cleaning tool striking and sand grain friction possibly suffered by the automobile in the long-term automobile washing process can be accelerated and simulated to the greatest extent, and the capability of the automobile paint film for resisting scrubbing of the automobile washing machine is truly reflected; therefore, the scrubbing resistance of the paint film to the car washer can be predicted by observing and testing the appearance change and gloss change of the paint film.

The invention relates to the field of protective films, and discloses a durable hydrophobic automobile paint surface protective film and a preparation method thereof.The paint surface protective film is prepared from a thermoplastic polyurethane elastomer, hydrophobized nano silicon dioxide, tetra [beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester and 2-(2H-benzotriazole-2-yl)-4, 6-di-tert-pentylphenol; the hydrophobic nano silicon dioxide is prepared from an ethanol water solution, heptadecafluorodecyl triethoxysilane, fumed silica and acetic acid. The paint surface protective film disclosed by the invention realizes a relatively lasting hydrophobic effect.

The utility model discloses a clamping tool for colored paint spraying of an automobile grille, and belongs to the field of automobile paint spraying. The clamping tool for colored paint spraying of the automobile grille comprises a tray, transmission frames are arranged on the two sides of the outer portion of the tray, second movable cavities are formed in the middle positions, facing the tray, of the interiors of the transmission frames, and second electric telescopic rods are arranged in the second movable cavities. According to the clamping device for spraying the automobile parts, the problems that an existing clamping device for spraying the automobile parts needs to be clamped from the outer portions of the automobile parts, and the effect of single-time spraying is affected are solved, the transmission frame can be driven to move relatively through rotation of the bidirectional threaded rod, and the protruding second movable plate can be driven to move through relative movement of the transmission frame; and the second movable plate transversely slides from the interior of the automobile grille part, slides and is attached to the inner wall of the automobile grille part, clamping and fixing are conducted from inside to outside, and the situation that the colored paint spraying effect is affected due to the fact that the second movable plate is attached to the outer wall is avoided.