884 results about "Powder coating" patented technology

The application discloses a kind of high-performance coiled material powder coating and preparation method thereof, belong to powder coating technical field, the application is by the compounding of organosilicon modified epoxy resin and carboxyl-terminated polyester resin, after organosilicon modification, the segment of introduction-Si-O-Si in system has high flexibility, and synergistic effect with nano calcium carbonate, it is helpful to balance the adhesion and flexibility of coating, grafting modification graphene oxide, active chromium oxide is added again, can obviously improve the mechanical strength of coating;After then, phosphite group is grafted onto graphene oxide, and is applied in the present powder coating system, can form three-dimensional network structure in system, chemical bond effect, not only can improve its crosslinking stability in system, and the sheet structure of graphene oxide, also can play certain barrier property, can also give coating longer weather resistance, and active chromium oxide synergistic effect is further improved, and the weather resistance and corrosion resistance of coating.

The invention relates to a high-strength corrosion-resistant aluminum profile and a preparation method and application thereof, and aims to solve the problems that the strength and the corrosion resistance of a traditional aluminum profile are difficult to consider, the surface performance is insufficient and the like. A novel aluminum profile with ultrahigh mechanical strength, excellent corrosion resistance, long-acting weather resistance and a self-cleaning function is developed through a composite technical path that a reinforced phase is generated in situ to optimize the matrix performance, an AT13 ceramic powder coating is used for strengthening the surface hardness and a high-strength corrosion-resistant coating is used for endowing functional characteristics.

The invention provides an electrostatic powder coating airflow stability real-time compensation method, and relates to the technical field of powder coating control, the method is realized based on an electrostatic powder coating airflow stability real-time compensation device, the device comprises a master control MCU, a pneumatic control valve, a stepping motor driver for driving the pneumatic control valve, and a current sampling circuit coupled to the stepping motor driver, the current collector is used for collecting winding current of the stepping motor in real time. The method comprises the following steps that after a pneumatic control valve is opened to a target opening degree and enters a holding state, a static holding current value of the pneumatic control valve is obtained; comparing the static holding current value with a preset reference holding current value, wherein the preset reference holding current value corresponds to the holding current required by the target opening degree under the smooth state of the airflow channel; according to the offset of the static holding current value relative to the reference holding current value, whether the airflow channel has a blocking trend or not is judged; if not, the current target opening degree of the pneumatic control valve is maintained, the airflow state change can be more directly sensed, and real-time active compensation is carried out.

The invention provides a long-acting anticorrosive epoxy powder coating and a preparation method thereof. The coating comprises epoxy resin, polyester resin, thiadiazole corrosion inhibitor loaded cerium-doped hydrotalcite composite particles, silane modified mica iron oxide, zinc phosphate, barium sulfate and the like. The core innovation lies in that 2-amino-5-(4-hydroxyphenyl)-1, 3, 4-thiadiazole corrosion inhibitor molecules are designed and synthesized, the molecules are loaded between cerium-doped magnesium-aluminum hydrotalcite nano container layers through an anion exchange method, corrosion environment pH responsive gradient release is achieved, a coating constructs a passive shielding, active corrosion inhibition and interface anchoring triple protection mechanism in the coating, and the corrosion resistance of the coating is improved. The neutral salt spray test resistance exceeds 2000h, and the coating is suitable for long-acting corrosion protection of iron accessories and cable bridges.

The invention provides epoxy resin for halogen-free flame-retardant self-leveling powder coating and a preparation method of the epoxy resin, and belongs to the technical field of powder coating. The flame retardant is mainly prepared from anhydrous piperazine, bisphenol A diglycidyl ether, trihydroxymethyl phosphorus oxide, triethyl phosphite, epoxy chloropropane, sodium hydroxide, N-methyl iminodiacetic acid, ethylene glycol diglycidyl ether and other main raw materials through polymerization. The prepared epoxy resin and 2-phenylimidazoline are subjected to low-temperature curing (135 DEG C / 20 min) on the premise that an additional flatting agent does not need to be used, the flexibility of a coating film is good, the impact resistance grade is high, the impact performance reaches the condition that no cracking phenomenon exists in the front and back 60cm, the leveling grade reaches the grade 7 or above, the gloss is high and reaches 95% or above, the oxygen index reaches 34% or above, and the halogen-free flame retardant performance is excellent.

The invention discloses a flame-retardant corrosion-resistant coating and a preparation method thereof, and relates to the technical field of fluorocarbon resin powder coatings. The flame-retardant corrosion-resistant coating comprises the following raw materials in parts by weight: 15-25 parts of fluorocarbon resin, 40-50 parts of epoxy resin, 3-5 parts of a curing agent, 5-7 parts of a reinforcing agent, 4-6 parts of a corrosion inhibitor, 6-8 parts of filler, 1-2 parts of a flatting agent and 0.5-1 part of benzoin. The preparation method comprises the following steps: reacting phosphonitrilic chloride trimer with p-hydroxybenzaldehyde to generate an intermediate 1, reacting the intermediate 1 with p-aminobenzoic acid to generate an intermediate 2, and reacting the intermediate 2 with 2-heptyl ethylene oxide to generate the reinforcing agent. The flame-retardant corrosion-resistant coating prepared by the invention has excellent mechanical properties, corrosion resistance, aging resistance and flame retardance.

The invention discloses special rolling equipment facilitating additive reducing of aluminum and aluminum alloy. The special rolling equipment comprises an additive reducing structure. The additive reducing structure comprises a reducing die, a lubricating powder guide barrel is arranged in the reducing die, and the end of the reducing die is blocked through a cover plate and used for limiting lubricating powder. Additive materials are evenly coated with lubricating powder after passing through the first feeding hole, the cleaning hole and the second feeding hole. According to the lubricating powder coating device, the rotary spiral blade is matched with the conical feeding hole, so that uniform and continuous coating of lubricating powder is realized, and the problems of coating dead angles and non-uniform thickness existing in a traditional powder coating mode are solved; through a closed circulating powder supply structure, lubricating powder leakage and dust pollution are greatly reduced, and occupational health risks and environmental protection cost are reduced; the coating is leveled in real time through the cleaning holes, drawing fracture and mold abrasion are reduced, and the yield and the production stability are improved; the device is compact in overall structure, convenient to disassemble, assemble and maintain, high in universality and suitable for continuous reducing machining of aluminum and aluminum alloy additional materials of various specifications.

The invention discloses a boiling-resistant highlight black powder coating, and relates to the field of powder coatings. The boiling-resistant highlight black powder coating comprises the following raw materials in parts by weight: 30-45 parts of amide modified polyester resin; 25 to 35 parts of epoxy resin; 0.8 to 1.5 parts of a leveling agent; 0.3 to 0.6 part of a degassing agent; 0.8 to 1.2 parts of a brightening agent; 0.4 to 0.9 part of micro powder polyethylene wax; 1-2 parts of carbon black; 1-3 parts of a curing agent; 10-16 parts of stearic acid modified mica powder; and 10-16 parts of hollow glass beads. The boiling resistance and weather resistance of the thermosetting powder coating are improved, and the highlight black powder coating with good boiling resistance is prepared.

The invention discloses an anticorrosive coating composition based on a nano hybrid and a preparation method of the anticorrosive coating composition, and relates to the technical field of powder coatings. Comprising the following components in parts by weight: 60-70 parts of fluorosilicone modified epoxy resin, 8-10 parts of an aminoethylated acrylic polymer, 4-8 parts of a functionalized nano hybrid, 4-6 parts of a curing agent, 0.3-1.2 parts of an accelerant, 1-2 parts of benzoin, 2-4 parts of a functional aid, 10-15 parts of a micron-sized filler and 1-2 parts of a coupling agent. The curing agent is prepared by compounding dicyandiamide, bicyclo [2.2. 1] heptane dimethylamine and 3, 5-diamino-1, 2, 4-triazole according to a mass ratio of (3 to 5): 1: (0.8 to 1.2). The coating composition is high in adhesive force and excellent in impact resistance and corrosion resistance.

The invention relates to the technical field of coatings, and discloses a heat-insulating powder coating as well as a preparation method and application thereof. The heat insulation powder coating is prepared from the following preparation raw materials in parts by mass: 160 to 220 parts of organic silicon modified polyester resin, 10 to 30 parts of modified hollow glass beads, 30 to 70 parts of modified sericite powder, 40 to 60 parts of titanium dioxide, 3 to 5 parts of hydrophobic SiO2 aerogel and 10 to 20 parts of curing agent, wherein the organic silicon modified polyester resin is prepared by melting and blending weather-proof polyester resin and organic silicon resin according to the mass ratio of (4-9): 1; the temperature of melt blending is 90 to 130 DEG C. According to the coating, the excellent heat insulation performance that the solar reflectance is larger than or equal to 0.87 and the heat conductivity coefficient is smaller than or equal to 0.075 W / m.K is achieved, the excellent mechanical strength, adhesive force, impact resistance and long-acting weather resistance are achieved, and heat loads on the surfaces of building outer walls, industrial furnace shells, household appliances and the like can be remarkably reduced.

The invention provides halogen-free flame-retardant liquid epoxy resin, solid epoxy resin for powder coating and a preparation method of the solid epoxy resin, and belongs to the technical field of powder coating. The liquid epoxy resin disclosed by the invention is prepared by polymerizing 2, 4-diamino-6-phenyl-1, 3, 5-triazine, formaldehyde, triethyl phosphite, epoxy chloropropane, sodium hydroxide, DMF (Dimethyl Formamide) and the like. The contents of halogen-free flame-retardant elements nitrogen and phosphorus in the product are high, a solid epoxy resin product obtained by carrying out chain extension on liquid epoxy resin serving as a synthetic monomer of solid epoxy resin of the powder coating and bisphenol F is good in flame retardance, the oxygen index reaches 37% or above, and the flame retardance is high. A coating film obtained after the powder coating and an accelerated dicyandiamide curing agent are subjected to low-temperature rapid curing (150 DEG C / 10 min) is high in gloss and leveling grade and good in impact resistance, hardness and the like, and the application requirements of the powder coating are met.

The invention belongs to the technical field of coatings, and particularly relates to polyester resin for a powder coating as well as a preparation method and application of the polyester resin. The polyester resin for the powder coating is prepared from the following raw materials: polyol, polyacid, polyamide acid oligomer and an acidifying agent. The polyamide acid oligomer is introduced in the synthesis of the polyester resin, an amide structure in the polyamide acid oligomer can improve the electrification property of polyester, the improvement of the electrification property is beneficial to improving the powdering rate of powder, and meanwhile, an N-H bond in the amide structure has relatively strong polarity and hydrogen-bond interaction; the wettability of the base material is obviously improved through the synergistic effect of the two. Therefore, the polyamide acid oligomer is introduced into the polyester resin and is combined with other components, so that the corner coverage rate of the powder coating can be obviously increased.

The invention relates to the technical field of powder coatings, and provides a preparation method and equipment of a metal-texture colored powder coating, and the method comprises the following steps: carrying out dispersion treatment on flaky aluminum powder through an alcohol solvent, and then adding a silicon source for hydrolysis reaction, so that the surface of the flaky aluminum powder is coated with a silicon dioxide layer; dispersing the flaky aluminum powder coated with the silicon dioxide layer into water, and adding composite metal salt for co-deposition treatment, so that the surface of the flaky aluminum powder is coated with a composite metal oxide layer; and dispersing the flaky aluminum powder coated with the silicon dioxide layer and the composite metal oxide layer into an organic solvent for polymerization reaction, so that the surface of the composite metal oxide layer is coated to form a polymer resin layer, and the modified aluminum pigment is obtained. The composite metal salt is added for co-deposition treatment, so that the surface of the flaky aluminum powder is coated with the composite metal oxide layer, and the color transition effect can be realized and the color richness can be improved by adjusting the proportional gradient change of various metal salts in the composite metal salt.

This invention discloses a bio-based flame-retardant thermally expanding powder coating and its preparation method, relating to the field of coatings. It comprises the following components: bio-based epoxy resin, phenolic epoxy curing agent, ammonium polyphosphate, nano-titanium dioxide, zinc borate, expanded graphene, 8-12 parts of imidazole, benzoin, and a leveling agent. The bio-based epoxy resin is prepared by ring-opening copolymerization of cashew phenol glycidyl ether and linoleic acid prepolymer, followed by epoxy end-capping, with an epoxy equivalent of 900-1200 g / eq; the phenolic epoxy curing agent has an epoxy equivalent of 200-250 g / eq; and the expanded graphene has an initial expansion ratio of 200-300 times. The preparation method employs a two-step, staged mixing process. This invention, while maintaining zero VOC in powder coatings and the same film thickness, achieves for the first time the outstanding performance of 6H hardness, UL94V-0 flame retardancy, and 120 times expansion ratio through the systematic synergy of high epoxy equivalent bio-based resin, four-component complete flame retardant system, specific EG:APP ratio, and two-step process.

The invention discloses an aluminum profile spraying device, and belongs to the technical field of spraying devices, and the aluminum profile spraying device is characterized by comprising a spraying box provided with a box door; the spraying system is installed in the spraying box, the spraying system comprises a spraying head, and the spraying system is used for spraying powder coating; the clamp mechanism is installed in the spraying box, the clamp mechanism comprises a clamping seat, first chuck seats and second chuck seats, the first chuck seats and the second chuck seats are provided with clamping parts, the first chuck seats and the second chuck seats are matched to form a group, the clamp mechanism is provided with two groups of first chuck seats and second chuck seats, and the first chuck seats and the second chuck seats are arranged on the first chuck seats and the second chuck seats. The first chuck seat and the second chuck seat are movably mounted on the clamping seat; and the rotating mechanism is used for driving the clamp mechanism to rotate. According to the spraying device, clamping can be conducted according to the type of the aluminum profile, and the applicability of the spraying device is improved.

The invention discloses twin-screw extrusion equipment for powder coating production, and particularly relates to the technical field of powder coating production, the equipment comprises an operation table, a first extrusion screw, a second extrusion screw, a first rotary driving cylinder, a second rotary driving cylinder, a dynamic mixing assembly and an angle-adjustable feeding assembly, an extrusion charging barrel is mounted at one end of the top of the operation table, the extrusion charging barrel is fixedly connected with the operation table through a positioning frame body, and a heater is mounted on the extrusion charging barrel; the first extrusion screw rod and the second extrusion screw rod are slidably inserted into the extrusion material barrel through a first transmission rod and a second transmission rod respectively, a connecting plug column is mounted on the second transmission rod, and the second transmission rod is connected with the connecting plug column through a transverse pushing adjusting assembly; according to the invention, raw materials can be distributed and heated more uniformly, and material adhesion is avoided; the screw flight distance can be adjusted as required, and the product quality is improved; raw material feeding angle can be controlled, stirring is enhanced, and high-efficiency and high-quality production is guaranteed.

The invention belongs to the technical field of coatings, and particularly relates to textured high-toughness polyester resin as well as a preparation method and application thereof. The textured high-toughness polyester resin is prepared from the following raw materials: polyol, polyacid, carboxyl silicone oil, a dynamic cross-linking agent, an acidolysis agent and carboxyl-terminated nitrile rubber. The dynamic cross-linking agent contains at least two carboxyl groups and one disulfide bond. Through the synergistic effect of the dynamic cross-linking agent, the carboxyl silicone oil and the carboxyl-terminated nitrile rubber, the problem that a traditional texture type powder coating is insufficient in toughness is solved, and the impact resistance, the flexibility, the low-temperature mechanical property and the self-repairing capacity of a coating are remarkably improved while clear textures are kept.

This invention relates to the field of powder coating technology, and proposes a high-abrasion-resistant polyester powder coating and its preparation method. The high-abrasion-resistant polyester powder coating comprises the following components in parts by weight: 50-80 parts polyester resin, 20-50 parts epoxy-cured polyester resin, 3-6 parts curing agent, 8-12 parts filler, 3-4 parts leveling agent, and 0.5-1 part defoamer; the acid value of the polyester resin is 20-55 mgKOH / g; and the acid value of the epoxy-cured polyester resin is 30-38 mgKOH / g. This technical solution solves the problem of poor abrasion resistance and adhesion of existing polyester powder coatings.

This invention provides an intelligent optimization and collision avoidance method for powder coating lifting fixture paths, relating to the field of powder coating production automation technology, including the following steps: S1: Constructing an environmental map of the powder coating production line, generating an initial lifting fixture path based on an improved A* algorithm, the improved A* algorithm optimizing the heuristic function by introducing a direction cost factor; S2: Iteratively optimizing the initial path generated in S1 using an adaptive inertia weight PSO algorithm to obtain a multi-objective optimal path; This invention introduces a direction cost factor into the heuristic function of the A* algorithm, fully considering the matching degree between the lifting fixture's movement direction and the target direction, resulting in an initial path that better conforms to the lifting fixture's movement characteristics, reducing redundant segments and unreasonable turns; Combined with the adaptive inertia weight PSO algorithm, the inertia weight is dynamically adjusted according to the iteration process, which can accurately adapt to the path optimization needs of different production line scenarios, achieving multi-objective optimization of lifting fixture running time, path length, and workpiece sway amplitude.

This invention relates to the field of powder coating equipment technology, and more particularly to a powder coating device and method for producing basketball hoops. It includes an integrated assembly with a powder tank connected to it. The powder tank is connected to a spray pipe, which is rotatably connected to a rotating tube. A variable nozzle is fixedly connected to the rotating tube. Adjusting rods, evenly spaced circumferentially distributed, are hinged to the rotating tube. A sliding frame is slidably connected to the spray pipe, and an electric push rod is fixedly connected to the spray pipe. The telescopic end of the electric push rod is fixedly connected to the sliding frame. A rotating ring is rotatably connected to the sliding frame. Several first adjusting members and two second adjusting members are fixedly connected to the rotating ring. A transmission rod is fixedly connected to each adjusting rod. This invention, by setting a variable nozzle with a changeable shape and utilizing the evenly spaced circumferentially distributed adjusting rods as the skeleton of the variable nozzle, allows for changes in the shape and size of the variable nozzle opening by altering the state of the adjusting rods, thereby meeting different powder coating requirements.

The invention discloses a control method for a preparation process of a high-weather-resistance fluorocarbon powder coating, relates to the technical field of powder coating control, and aims to solve the problems of weather resistance, low-voltage electrostatic spraying adaptability and large production fluctuation in long-term outdoor use. The method comprises the following steps: firstly, constructing a multi-dimensional index system of an extrusion thermal history index, a particle size morphology comprehensive index, an electrostatic spraying adaptability index and a weather resistance comprehensive prediction index; establishing a quantitative relation between process indexes and performance indexes through an extrusion and grinding combined test of a representative formula, and analyzing to obtain a safe operation area meeting spraying and weather resistance requirements; then, data and powder performance of an extrusion section and a grinding and grading section are collected in actual production, batch indexes are calculated, and the process state is judged; and finally, extrusion and grinding process parameters are cooperatively adjusted according to the state information, so that the powder keeps balance among long-term weather resistance, low-voltage spraying adaptability and production stability.

The utility model relates to powder mixing equipment technical field discloses a thermosetting plastic powder paint solidification mixing arrangement, including mixing jar, the top fixed intercommunication of mixing has the feed pipe of setting up obliquely upwards. This kind of thermosetting plastic powder paint solidification mixing arrangement, through the feed pipe of setting up obliquely upwards and the inside setting up's intercepting net cylinder, smash axle and smash leaf structure, has realized the purpose of breaking up in the feeding process to the particle or agglomerate in powder, keeps into the uniform fine of mixing jar powder, effectively avoided the problem of uneven mixing due to agglomeration, thereby guaranteed the forming quality of subsequent thermosetting plastic powder paint, improved the performance stability of product, through the structural combination of stirring shaft, self -moving cover, stirring vane, connecting rod, resist ball, annular wave track and compression spring, has realized the purpose that stirring vane reciprocates up and down while rotating, greatly increased the contact area and stirring range of stirring vane and powder material.

The invention discloses a low-energy-consumption polyurethane powder coating and a preparation method thereof, and belongs to the technical field of polyurethane powder coatings. Comprising the following raw materials in parts by weight: 60-70 parts of polyester polyol, 10-20 parts of a closed HDI tripolymer, 5-10 parts of a flame retardant aid, 1-2 parts of a flatting agent, 2-3 parts of an anti-yellowing agent, 0.5-1.5 parts of a dispersing agent, 0.4-0.8 part of a degassing agent and 8-12 parts of superfine barium sulfate. The low-hydroxyl-value polyester polyol and the closed HDI tripolymer are matched for use, so that the temperature and time required in the curing process are greatly reduced, and the energy consumption is reduced; the self-made flame-retardant additive can effectively improve the flame-retardant property of the coating, reduce the fire risk and prolong the service life; in conclusion, the prepared coating achieves the dual purposes of energy conservation, environmental protection, safety and flame retardance, and has important application value in the field of polyurethane powder coatings.

The utility model discloses a fine grinding device for powder coating processing, which comprises a grinding tank, the grinding tank is of a hollow cavity structure, a turnover mechanism and a grinding mechanism are arranged on the grinding tank, the turnover mechanism comprises a turnover motor and a shifting rod, the turnover motor is horizontally arranged and is fixed on the grinding tank, and the shifting rod is fixed on the grinding tank. The output end of the overturning motor is fixedly connected with an inner edge shaft, a stretching rod is fixed to the end, away from the overturning motor, of the inner edge shaft, and the end, away from the inner edge shaft, of the stretching rod is fixedly connected with a material stirring rod which is close to the inner wall of the cavity of the grinding tank. The grinding mechanism comprises a grinding motor, an extension shaft fixedly connected with the output end of the grinding motor and a mounting disc fixed to the bottom of the extension shaft, the mounting disc and the extension shaft are eccentrically designed, and a grinding hammer is fixed to the lower end face of the mounting disc. According to the fine grinding device for powder coating processing, the problem that coating left at the bottom cannot be ground can be avoided, and the grinding efficiency can also be improved.

The utility model discloses a grounding type spraying workbench for anti -static powder coating, belong to electrostatic spraying equipment technical field. The workbench includes workbench body, metal frame, conducting table top, grounding assembly and spraying workpiece clamping device. Conducting table top sets up in the top of metal frame, and the whole constitutes conducting structure, and grounding assembly includes the grounding conductive nail of installing in the frame foot bottom and the grounding busbar of being connected with the table top and clamping device, ensures the effective release of static electricity in the spraying process. Clamping device is equipped with rotating support and universal chuck, is used for clamping the metal workpiece of waiting to spray, and constructs the static electricity conduction path. The workbench still sets up the grounding state detection module, is used for judging whether the grounding effect is reliable. The structure has the advantages of grounding closed loop clear, workpiece fixed flexible, high safety, is applicable to the spraying process of various anti -static powder coating.

The utility model relates to a powder coating production device convenient to load, which belongs to the technical field of powder coating loading production and comprises a loading tank and a production device main body, and a knocking and turning assembly is fixedly connected outside the loading tank; the knocking and turning assembly comprises a mounting frame fixedly connected to the outer side of the feeding tank, a servo motor is fixedly connected to the right side of the mounting frame, a two-way lead screw is fixedly connected to an output shaft of the servo motor, a movable block is in threaded connection with the outer surface of the two-way lead screw, and a metal ball head is fixedly connected to the outer side of a spring sleeve. The top of the vertical frame is fixedly connected with a rotating motor, and an output shaft of the rotating motor is fixedly connected with a stirring shaft. According to the powder coating production device convenient to feed, by arranging the knocking and turning assembly, the anti-blocking and anti-adhesion functions are achieved, the feeding smoothness is guaranteed, then the feeding efficiency of powder coating is effectively improved, and the production requirement is better met.

The utility model discloses a powder coating mixing device, which relates to the technical field of powder coating mixing and comprises a base, a tank body is arranged on the inner wall of the base, and a hydraulic cylinder is controlled to drive a connecting plate to lift upwards, so that a fixing plate fixed with the connecting plate slides on the inner wall of a groove until a concave plate is separated from a bore log. A water pump is used for pumping a water source in a water tank to the inner wall of a connecting pipe, the water source is injected into a hole column through the connecting pipe, the outer wall of a tank body is clamped with the inner wall of a groove plate, the tank body is arranged on the outer wall of a base, and the inner wall of the tank body is sleeved with the outer wall of the connecting column; a square block fixed at the bottom end of a connecting column is inserted into the inner wall of a supporting block, and the inner wall of a cover plate is clamped with the top end of the connecting column, so that when the stirring rod stirs and mixes the powder coating in the tank body, the tank body is prevented from shaking on the outer side of the base, the joint of the tank body and the base is prevented from loosening, and the mounting stability of the tank body on the base is enhanced.

The embodiment of the utility model provides powder coating paint film bending test equipment which comprises a supporting frame, a bending support and a bending device, the bending device is arranged on one side of the bending support, a bending die holder is arranged below the bending device, the lower end of the bending die holder is connected with a bending table, the bending die holder is in a shape of a Chinese character'ao ', and the bending table is connected with the supporting frame. The two sides of the bending die holder are further provided with discharging channels, the discharging channels are further provided with limiting transverse rods, a metal workpiece to be tested placed on the bending die holder is pressed downwards through the bending device, so that the workpiece is bent to form an n shape, four bending angles are formed in the testing workpiece bent to be in the n shape, and then a paint film on the metal testing workpiece is observed. Under the condition that a metal test workpiece is elongated, the bending test state of 90 degrees or more can be observed through one sample, so that perfect detection is provided, and test results such as strength, elasticity and metal adhesion of a paint film formed by the powder coating are obtained.

Storage box (100) comprising a frame (110) and at least one carrier plate (200) attached to the frame (110), characterized in that the carrier plate (200) has on its outer surface a powder coating (300) with a profiled microtopography, which is designed to provide adhesion for a plaster layer (320).

The utility model relates to the technical field of curing of coating spraying, and discloses an epoxy powder coating spraying curing device which comprises a first fan, the lower surface of the first fan is fixedly connected with a base, the lower surface of the base is fixedly connected with a machine body, and a quick release assembly is arranged in the machine body. And the quick release assembly comprises a lead screw and a fixing column, the fixing column is arranged in the machine body, a bottom plate is arranged in the machine body, a baffle is slidably connected to the outer wall of the bottom plate, the fixing column is fixedly connected to the interior of the baffle, the fixing column is arranged in the bottom plate, and a connecting plate is fixedly connected to the outer wall of the baffle. According to the utility model, the baffle plate and the connecting plate are driven to move on the screw rod, so that the effect of clamping or loosening the bottom plate is achieved, and the bottom plate can be pulled out through the pull ring after being loosened, so that the bottom plate can be quickly disassembled and efficiently cleaned, and the influence of dust on curing is avoided.