2708 results about "Powder coating" patented technology

The invention discloses an electrostatic powder coating control method, which relates to the technical field of powder coating control, and comprises the following steps: a PLC (Programmable Logic Controller) control system is combined with a position encoder and a sensor to realize synchronous follow-up spraying of a spray gun on a workpiece, and the spraying voltage, current and powder supply parameters are dynamically adjusted according to the powder resistivity and the deposition state; in the workpiece curing process, PID control is adopted to guarantee that the temperature and the conveying speed are stable, and after spraying, the spraying time and path are corrected in a closed-loop mode in combination with film thickness detection data; the control system further constructs a multi-objective optimization model, and dynamically adjusts the spraying strategy according to the film thickness consistency and the beat efficiency. The problems that in the traditional spraying process, a spray gun is rigid in path, parameters are fixed, and quality feedback is lagged are solved, and high-consistency, high-efficiency and high-adaptability intelligent coating control is achieved.

A base for a powder coating booth, including a base structure, through which the booth is intended to rest on a floor, the base structure being configured to support a powder coating compartment of the booth. The base also includes a floor, which is supported by the base structure and which is configured to delimit the bottom of the powder coating compartment. To reduce the accumulation of residual powder, the floor includes at least one oblique panel, which is inclined with respect to the horizontal and which is configured to delimit the bottom of the powder coating compartment of the booth, whereas the at least one oblique panel is porous so as to be permeable to the air and impermeable to the residual powder resulting from powder coating an article within the powder coating compartment.

The invention discloses a real-time monitoring and feedback control system for enamel electrostatic powder coating, and relates to the technical field of industrial enamel coating. The system comprises a data acquisition and monitoring module, a feedback control decision module, an execution mechanism control module, a spraying path planning and adjusting module, a parameter optimization and adaptive adjustment module and a multi-target cooperative adjustment strategy module. The system builds a standardized state vector and recognizes abnormity by collecting spraying enamel electrostatic powder state parameters, deposition error signals and environment interference data, and closed-loop control and dynamic adjustment of spray gun electrode voltage, powder supply amount and spray gun path parameters are achieved. Intelligent algorithms such as particle swarm optimization are introduced to optimize a controller and process parameters, the coating uniformity and the deposition efficiency are automatically balanced in combination with a multi-target collaborative strategy, and stable spraying quality is achieved under complex working conditions. The method has the advantages of self-learning, self-adaption and expandability, and the intelligent level and the production performance of the enamel electrostatic powder spraying process are remarkably improved.

The invention relates to an insulating weather-resistant powder coating and a preparation method thereof, and belongs to the technical field of coatings, and the powder coating comprises composite modified resin, a dual curing agent, a functional filler, a polyacrylate leveling agent, fumed silica, a benzotriazole ultraviolet light absorber, polytetrafluoroethylene wax powder and the like. A core-shell structure of the composite modified resin is designed, high insulativity is kept through a silane modified epoxy core layer, a weather-proof barrier is provided through an acrylic acid shell layer, and the phase separation problem is solved through interface chemical bonding; a dual-curing mechanism is designed, and isocyanate and acrylic hydroxyl react to form an interpenetrating network while an epoxy core layer is cured by anhydride; a filler synergistic effect is designed, silane coupling agent modified nano boron nitride forms a three-dimensional heat-conducting insulating network, and rutile type titanium dioxide is coated with silicon dioxide, so that ultraviolet aging is resisted. All the components cooperate with one another, so that the coating has excellent insulativity, weather resistance, adhesiveness and the like at the same time.

A patch panel comprises an exposed raised area or bump behind each patch panel opening that maintains electrical conductivity between the patch panel frame and a housing of a jack while the jack is installed in the opening. During the manufacturing process, this grounding bump can be masked from paint or powder coating so that the bare metal of the bump remains exposed, yielding a raised surface that readily makes conducive contact with the conductive casing of a jack installed in the patch panel opening without the need for an intermediate component that would normally be required to bridge the gap caused by paint or powder coat thickness.

The invention relates to the technical field of heavy anti-corrosion coatings, in particular to a graphene enhanced epoxy modified organic silicon resin heavy anti-corrosion powder coating. The coating is prepared from the following components in parts by weight: 42 to 58 parts of epoxidized epoxy modified organic silicon resin, 0.8 to 2.5 parts of hydroxylated graphene, 6 to 11 parts of nano zirconium dioxide coated boron nitride, 2.5 to 5.5 parts of lanthanum iso-octoate-titanate composite coupling agent, 1.5 to 3.5 parts of bis (3-triethoxysilylpropyl) disulfide, 4 to 7 parts of polyhedral oligomeric silsesquioxane, 5 to 8 parts of curing agent, 0.8 to 1.8 parts of flatting agent and 0.4 to 0.9 part of defoaming agent. 2.5 to 4.5 parts of polyether-ether-ketone micro powder and 1.2 to 2.8 parts of fluorine-containing phosphate ester. According to the invention, the resin is modified through chemical bridging, the modified graphene and the nano-coated powder are matched to construct a synergistic enhancement system, and the interface bonding is optimized by the composite coupling agent. The coating is excellent in adhesive force, corrosion resistance and mechanical property, good in processing fluidity and high in aging resistance and thermal stability, solves the problem that a traditional product is short in performance, and meets the industrial requirement.

The invention relates to the technical field of coatings, and discloses a modified hexagonal boron nitride and organic silicon double-component doped high-flame-retardant epoxy resin powder coating as well as a preparation method and application thereof. Comprising the following raw materials in parts by weight: 25-50 parts of modified hexagonal boron nitride, 90-110 parts of organic silicon resin, 120-150 parts of epoxy resin, 5-8 parts of dicyandiamide, 100-120 parts of silica powder, 8-12 parts of other auxiliaries and 80-100 parts of filler. The flame-retardant epoxy resin powder coating is prepared by uniformly mixing the components, melting, extruding a sheet material, grinding and sieving. The flame-retardant and fireproof performance of the epoxy resin powder coating is greatly improved in a modified hexagonal boron nitride and organic silicon double-component doping mode.

The invention discloses a temperature-resistant high-strength powder coating and a preparation method thereof, and belongs to the field of coatings. The invention relates to a temperature-resistant high-strength powder coating which is prepared from the following raw materials in percentage by weight: 40-50% of epoxy resin; 20-30% of polyester resin; 6-10% of a curing agent; 1-3% of a leveling agent; 1-2% of a filler; and the balance of pigment. According to the polyester resin, aliphatic diisocyanate reacts with polyether polyol and hydroxyl silicone oil to obtain a polyurethane prepolymer, and then the polyurethane prepolymer reacts with vinyl benzylamine, an acrylate monomer and an acrylic monomer to obtain the polyester resin. The powder coating has the advantage that the temperature resistance and the strength of the powder coating are improved.

The invention relates to a powder coating particle size automatic analysis method, which comprises the following steps: obtaining a powder coating particle image shot by an electron microscope, carrying out feature extraction on the particle image to obtain a plurality of feature maps, dividing each feature map into image blocks with the same size, obtaining areas of the image blocks on the particle image, obtaining a foreground score of the image block by using the average gray value and the contour line length of the region; selecting a plurality of target image blocks from each feature map according to the foreground score and particle size distribution information in the particle image, calculating the attention of the target image blocks at each layer of the encoder, and then calculating the attention of the target image blocks and the filtered image blocks based on the average gray value; and obtaining an output corresponding to the target image block in the encoder, taking the output as an input of a decoder, obtaining a particle frame in the particle image through the decoder, and obtaining particle size information of the powder coating according to the particle frame.

The utility model relates to the technical field of powder coating production, in particular to a fragment feeding mechanism for powder coating production, which comprises a support mechanism and a suction mechanism for realizing automatic feeding of powder coating fragments, and the suction mechanism is mounted above the support mechanism. The suction mechanism is arranged, the suction machine body and the motor are started, the motor drives the gear to rotate through the rotating shaft, the gear rotates to drive the rack to descend, the rack descends to drive the lifting disc and the lifting pipe to descend, and the lifting pipe descends and extends into the charging barrel. Powder coating fragments in the central area of the material barrel enter the material suction machine main body through the lifting pipe and the fixed pipe under the action of negative pressure, and the powder coating fragments in the peripheral area of the material barrel gradually flow to the central area along with continuous descending of the lifting pipe; and powder coating fragments in the charging barrel are completely sucked into the material suction machine main body.

The invention discloses a flame-retardant insulating powder coating for a new energy automobile and a preparation method of the flame-retardant insulating powder coating, and belongs to the technical field of coatings. The flame-retardant insulating powder coating for the new energy automobile is prepared from the following raw material components in parts by mass: 380 to 384 parts of epoxy resin, 56 to 58 parts of a toughening agent, 5 to 10 parts of modified flame-retardant filler, 100 to 101 parts of a composite curing agent, 5 parts of a flatting agent, 1 part of benzoin and 0.7 part of an accelerant, the toughening agent is obtained by carrying out a reaction on an isophorone diisocyanate tripolymer, 4-bromophenol and N-p-coumaroyl tyramine; the modified flame-retardant filler is obtained by firstly wrapping hexagonal boron nitride with polydopamine and then modifying with a silane coupling agent; the silane coupling agent is obtained by combining 4-benzonitrile oxygen butyl trimethoxy silane and a sulfydryl silane coupling agent; and the composite curing agent is obtained by combining 4, 4-diaminodiphenylmethane and amino-sulfydryl functional organic polysiloxane.

The invention discloses a cyclone separator for collecting powder coating, and relates to the technical field of cyclone separators. Comprising a barrel, the outer side of the barrel is fixedly connected with a support, the outer side of the barrel is fixedly connected with a feeding pipe, a conical barrel is fixedly connected to the bottom of the barrel, a spiral plate is fixedly connected to the inner wall of the conical barrel, a spiral groove is formed in the inner wall of the conical barrel, a round hole is formed in the middle of the top of the barrel, and a supporting column is fixedly connected to the top of the barrel; the number of the supporting columns is multiple, the multiple supporting columns are evenly distributed with the discharging assembly as the center, the tops of the supporting columns are fixedly connected with a bearing plate, and the top of the bearing plate is fixedly connected with the motor. According to the cyclone separator for collecting the powder coating, a definite flowing path is provided for dust particles by arranging the spiral groove and the spiral flow guide groove, so that dust can move towards the dust discharging opening more smoothly, the accumulation and backmixing phenomena of the dust on the inner wall of the conical barrel are reduced, and the dust discharging efficiency and stability are improved.

The invention discloses a powder coating hopper anti-blocking device, and relates to the technical field of anti-blocking devices, the powder coating hopper anti-blocking device comprises a screening structure, the screening structure comprises a screening assembly and a guide assembly, the guide assembly and the screening assembly are driven to move synchronously to screen powder coatings, and the powder coatings are screened through the synergistic effect of a reflecting plate, a barrier plate and a triangular guide plate and the matched use of a spiral structure; the guiding assembly and the screening assembly are driven to synchronously move so as to screen powder coating, and effective separation of fine-particle coating and large-particle coating is achieved. The reflecting plate is obliquely mounted, and the kinetic energy advantage of large-particle coating is utilized to guide the large-particle coating into the powder storage area; the fine-particle coating is effectively blocked from passing through the blocking plate; the inclined plane design of the triangular guide plate ensures that the large-particle coating can smoothly slide to the coarse material outlet, the accuracy and reliability of the screening result are ensured, and meanwhile, the screening assembly is arranged below the emptying hopper, so that the undesirable phenomenon of dust diffusion caused by flying of the fine-particle coating can be avoided.

The invention discloses a wear-resistant and high-temperature-resistant fluorocarbon powder coating and a preparation method thereof. Comprising the following steps: step 1, adding FEVE resin, a modified filler, a curing agent, a flatting agent and an antioxidant into a high-speed mixer, and mixing for 10-15 minutes until the materials are uniform to obtain a mixed raw material; and 2, transferring the mixed raw material into an extruder, extruding, tabletting, cooling, crushing, and screening with a standard sieve to obtain the fluorocarbon powder coating. The preparation method has the beneficial effects that the modified chitosan and the montmorillonite are compounded, the cerium salt is adopted for further modification, and after the obtained modified filler is added into a coating component, the wear resistance and the high-temperature resistance of a coating are remarkably improved.

The invention provides a preparation method of silicon dioxide serving as a flow promoter in a powder coating. The preparation method comprises the following steps: synthesizing silicon dioxide by using a precipitation method; washing and filter-pressing to obtain a precipitate; re-dispersing and pulping the silicon dioxide by using pure water; performing drying; performing high-temperature crushing; the synthesis of silicon dioxide comprises the following steps: adding bottom water, and heating to 40-100 DEG C; adding water glass and acid into the bottom water in a parallel flow manner under the conditions of constant temperature and pH value of 5.0-10.0; adjusting the pH value to 2.0-4.0 by using an acid; the specific surface area of the silicon dioxide is 100-500m < 2 > / g; the bulk ratio of the silicon dioxide is not higher than 0.30 g / cm < 3 >; the particle size of the silicon dioxide is not higher than 5.0 microns; the methanol value of the silicon dioxide is higher than 30%; the drying weight loss of the silicon dioxide is not higher than 3.0%. The preparation method of the silicon dioxide serving as the flow promoter in the powder coating is simple in process and low in cost.

The invention discloses a high-adhesiveness corrosion-resistant powder coating and a preparation method thereof, and belongs to the technical field of coatings. The powder coating is prepared from the following raw materials: modified epoxy resin, composite modified filler, a curing agent, a flatting agent, a dispersing agent, benzoin, sodium fluoride and the like. The epoxy resin is modified, amino is introduced to enhance the interaction with the grafted phosphate nano-silica, and BYK-163 is introduced, so that the compatibility is improved. In the composite modified filler, nano silicon dioxide A is grafted with a phosphate group, and can form a chemical bond with metal and quickly form a passive film; the nano silicon dioxide B is grafted with a fluorine-containing group, so that the coating is endowed with low surface energy and chemical stability, and long-acting protection is realized. Sodium fluoride destroys metal lattices at high temperature to form anchor points, and adhesive force is improved. The problem that a traditional powder coating is insufficient in adhesive force and corrosion resistance is solved, and the powder coating is suitable for metal protection in various complex environments and has wide application prospects.

Provided herein are powder formulations for a primer coat and a topcoat, and methods of applying the powder formulations to at least a portion of a surface of a substrate. Such methods can include applying a powder formulation to a substrate for a topcoat alone or in combination with a primer coat, and then heating the substrate, thereby forming a cured coating on at least the portion of the surface of the substrate. Such heating can be conducted in a single cure step to provide the cured coating including a cured topcoat alone or in combination with a cured primer coat.

Methods and systems for coating metal substrates are provided. The methods and systems include sequential application of low flow and high flow powder coatings followed by a single heating step to provide a cured coating. The methods and systems include a marker that allows coating uniformity to be monitored and assessed during application. The described methods provide coatings with optimal surface smoothness and edge coverage.

The invention relates to the technical field of polyester resin, and discloses a preparation method and application of super-weather-resistant HAA curing type extinction polyester resin, neopentyl glycol, a triazine phenyl imide diol monomer, binary acid, an esterification catalyst, an onium salt curing accelerator and the like are subjected to a reaction, and the super-weather-resistant HAA curing type extinction polyester resin is obtained. The triazine phenyl imide diol monomer has a phenyl imide ring and triazine ring structure with heat resistance and structural stability, is beneficial to improving the high temperature resistance and mechanical strength of a polyester resin powder coating paint film, shows higher impact resistance, contains a dialkyl side chain, and can be used for preparing the polyester resin powder coating after being introduced into a polyester molecular chain. The modified polyester resin can generate steric hindrance and shielding effects, inhibit contact between water molecules and ester bonds in polyester molecular chains and reduce hydrolysis reaction of ester groups, so that the hydrolysis resistance of the polyester resin is improved. And the paint film has the advantages of good ultraviolet aging resistance, high weather resistance and high gloss retention rate.

The utility model discloses a coating impact testing device, which belongs to the field of thermosetting powder coating performance testing, and comprises a bottom plate, limiting mechanisms arranged at the top of the bottom plate, an adjusting mechanism arranged between the limiting mechanisms, an impact mechanism arranged at the top of the adjusting mechanism, a marking mechanism arranged at the top of the impact hammer, and a marking mechanism arranged at the bottom of the marking mechanism. The marking mechanism comprises a material storage box, the bottom of the material storage box is connected with a discharging pipe, the discharging pipe is an elastic pipe, and a stirring assembly is arranged in the material storage box. The device has the beneficial effects that a marking mechanism is arranged, marking pigment in a storage box is conveyed to the bottom of an impact hammer through a discharging pipe, so that an impact site can be marked when the impact hammer impacts a coating, and a place with unobvious deformation can be conveniently observed; and the stirring rod is arranged in the storage box, the stirring rod is driven by the rotating shaft to rotate, the pigment in the storage box is mixed, and layering or solidification of the pigment is avoided.

The invention relates to the technical field of ceramic substrates, in particular to a ceramic substrate blank powder coating and sintering process. Comprising the following steps: step 1, uniformly stirring boron nitride powder, terpilenol, ethyl cellulose, butyl benzyl phthalate and phosphate, and grinding to obtain coating powder; step 2, printing powder on the surface of the green body by using a silk-screen printing technology to form a powder pattern; a powder coating green body is obtained; step 3, stacking N powder-coated green bodies to obtain laminated green bodies; 4, the laminated green body is subjected to glue discharging sintering and sand blasting in sequence; and obtaining the ceramic substrate.

To provide a powder coating device that removes only fine powders that are difficult to attach to a coated object from a recovery powder circulation path, suppresses a ratio of fine powders contained in recovery powders, and has high adhesion efficiency.SOLUTION: A powder coating device performs coating by blowing a powdered paint A conveyed by conveyance air from a coating material tank 1 to a coated object W in a powder coating booth 6, and comprises a circulation path that recovers overspray powders which have not attached to the coated object W and returns the recovered recovery powders to the coating material tank 1. In the powder coating device, a fine powder removal device for removing fine powders which are difficult to adhere to the coated object is installed in the recovery powder circulation path.SELECTED DRAWING: Figure 1

The invention discloses a high-corrosion-resistance powder coating and a preparation method thereof, and belongs to the technical field of powder coatings. Through modification of the resin system, the ultraviolet absorbent modified epoxy resin and the weather-resistant polyester resin are compounded, so that the ultraviolet resistance and the weather resistance of the resin system are remarkably improved, and the corrosion resistance reduction caused by light aging is avoided; the flake graphene forms an excellent physical barrier to block corrosion medium permeation, then chemical passivation of zinc phosphate is combined to inhibit electrochemical corrosion, the synergistic effect is achieved, the corrosion resistance is synergistically enhanced from the physical and chemical angles, the path of the corrosion medium is further prolonged in combination with the laminated structure of the glass flakes, and the corrosion resistance is improved. And meanwhile, the filler A and the filler B can also play a role in enhancing the mechanical strength of the coating, so that the powder coating with high corrosion resistance can be obtained on the whole.

The application discloses a kind of ship super-long anticorrosion special nano powder coating, preparation method and application, belong to ship heavy anticorrosion material technical field.The preparation method of the ship super-long anticorrosion special nano powder coating is as follows: epoxy resin, graphene modified epoxy resin, core-shell structure ZnO@SiO2, modified 2,5-dimercapto-1,3,4-thiadiazole, borosilicate glass powder, flaky boron nitride, silane coupling agent modified silica, phenolic amine curing agent, 2-ethyl-4-methylimidazole, fumed silica, defoaming agent, ultraviolet absorber, high-temperature pigment are put into stirrer and stirred for 20-30min, then melt extrusion is carried out through double screw extruder, the extrusion temperature is 90-110 DEG C, grinds and sieves, and the ship super-long anticorrosion special nano powder coating is obtained.The coating prepared by the application has good anticorrosion performance and can be applied in the field of ship metal surface corrosion protection.

The invention provides a drinking water pipeline anti-corrosion powder coating multi-component proportioning intelligent batching method and system, and relates to the technical field of intelligent manufacturing, and the method comprises the following steps: obtaining drinking water pipeline anti-corrosion powder coating raw material parameters and formula information; constructing a quantitative characteristic volume element numerical simulation unit, and performing multi-scale bridging calculation in combination with microscopic molecular dynamics and a macroscopic discrete element method; inputting parameters, calculating, correcting a formula, and converting into control parameters; dynamically adjusting parameters through a regression network self-learning feedback compensation algorithm; starting mixing equipment for batching, calculating the uniformity in real time, stopping mixing after the uniformity reaches the standard, detecting a finished product, and generating a report. According to the invention, through a self-learning feedback compensation algorithm based on a regression network, in combination with real-time weight detection and a material blockage identification result, intelligent dynamic adjustment of quantitative feeding control parameters is realized.

The present invention discloses a fireproof insulating powder coating and a preparation method and application thereof, and belongs to the technical field of coatings. The fireproof insulating powder coating provided by the present invention comprises the following raw materials in parts by mass: 50 to 250 parts of silicone modified epoxy resin, 50 to 250 epoxy resin, 1 to 60 parts of curing agent, 1 to 20 parts of accelerator, 100 to 300 parts of filler, and 50 to 350 parts of auxiliary agent; the curing agent comprises a modified dicyandiamide curing agent; the modified dicyandiamide curing agent contains at least one of an aromatic group, an amino group or an epoxy group. The modified dicyandiamide curing agent of the present invention has excellent flame retardant and heat resistant properties, and has good curing reaction activity with epoxy resin, which is beneficial to improving the fireproof and heat resistant properties of the coating; at the same time, by compounding it with silicone modified epoxy resin and epoxy resin, it can work together to obtain a powder coating with excellent fireproof and insulating properties, which has a wide range of applications in battery protection.

The invention provides a method for preparing foamed ceramic by a foam impregnation process. The preparation method comprises the following steps: uniformly coating a foam matrix with raw material micro powder, and then carrying out slurry hanging and subsequent drying and sintering processes. According to the method, alkali liquor corrosion or complex surface treatment does not need to be carried out on the sponge base body, the mechanical property of the foam base body can be kept, the shape maintaining property after slurry hanging is good, and deformation is not likely to happen. The foam matrix is coated with the raw material micro powder, so that the surface roughness of the foam matrix is increased, and the slurry hanging effect can be remarkably improved. And moreover, the application range to ceramic slurry is wide, and the slurry hanging effect can be improved without adding excessive organic matters into the slurry. In the dynamic process, the foam matrix is subjected to powder coating, and the ceramic micro powder is uniformly distributed on the surface of the foam matrix, so that the slurry coating uniformity and the aperture ratio of the foamed ceramic are ensured.

The invention discloses a powder coating device for fireproof cable production, the powder coating device comprises a powder coating mechanism and a cleaning mechanism, the powder coating mechanism is composed of supporting legs, a tank body and a plurality of sprayers, through the arrangement of a linkage mechanism, an inner gear ring synchronously performs circular motion while a first cylinder body drives a cleaning head to perform circular motion, and the cleaning head is driven to perform circular motion; through meshing of a fixed gear, a driven gear rotates and performs circular motion at the same time, through connection of a second connecting shaft, a meshing rotation effect is generated between a second bevel gear and a first bevel gear, and through connection of a square shaft and a sliding pipe, a cleaning head generates a rotation effect; furthermore, friction between the cleaning head and the surface of the fireproof cable is increased, the cleanliness of the surface of the fireproof cable is improved, static electricity is generated on the surface of the fireproof cable, subsequent powder adsorption is facilitated, and the adhesive force of the powder on the surface of the fireproof cable is improved.

The invention belongs to the technical field of thermal protection coatings, and particularly relates to an ultra-high-temperature thermal protection powder coating, an ultra-high-temperature thermal protection coating and a preparation method and application of the ultra-high-temperature thermal protection powder coating. The invention provides an ultrahigh-temperature thermal protection powder coating. The ultrahigh-temperature thermal protection powder coating is prepared from transition metal boride, silicon carbide and metal carbide. The mass ratio of the transition metal boride to the silicon carbide is 9: (1-3); the metal carbide accounts for 5-35% of the total mass of the transition metal boride, the silicon carbide and the metal carbide. According to the ultrahigh-temperature thermal protection powder coating provided by the invention, the metal carbide is added into the transition metal boride-silicon carbide composite coating, the carbide has ablation resistance, and an oxidation product formed after oxidation of the metal boride and / or the metal carbide has a synergistic anti-oxidation effect, so that a high-melting-point compound can be obtained; therefore, the anti-ablation effect is improved.

The invention discloses automatic grinding production equipment for polyester resin for powder coating, and belongs to the technical field of powder coating production. The equipment comprises a grinding and screening barrel, a screening net, a grinding plate, a suction cavity and a feeding pipe, a screening groove is formed in the grinding and screening barrel, the screening net is installed in the screening groove, the grinding plate is configured to be driven to rotate in the grinding and screening barrel, and a gap is formed between the side wall of the grinding plate and the inner wall of the grinding and screening barrel; the side wall of the grinding plate and the inner wall of the grinding and screening barrel are combined to grind polyester resin in the gap, a push-pull piston is arranged in the suction cavity in a sliding mode, a suction pipe is connected to the suction cavity, the feeding pipe penetrates through one side wall of the grinding and screening barrel to extend into the grinding and screening barrel, and the push-pull piston is used for assisting the feeding pipe in feeding when sucking air flow. The invention particularly provides the automatic grinding production equipment for the polyester resin for the powder coating, which can reduce the size of the equipment, clean a screening net and assist feeding and discharging.