CN111471358A

CN111471358A - Powder coating for wear-resistant and corrosion-resistant aluminum alloy template and preparation process thereof

Info

Publication number: CN111471358A
Application number: CN202010412130.1A
Authority: CN
Inventors: 丁彪
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-07-31

Abstract

The invention discloses a powder coating for a wear-resistant anticorrosive aluminum alloy template and a preparation process thereof, wherein the powder coating for the wear-resistant anticorrosive aluminum alloy template is prepared from the following raw materials in parts by weight: 20-25 parts of polyvinylidene chloride, 1.5-4 parts of titanium dioxide powder, 1.5-4 parts of silicon dioxide powder, 3-5 parts of stearic acid, 4-8 parts of reinforcing agent, 1.6-2 parts of silicone oil and 2-4.5 parts of polyethylene wax; the powder coating contains stearic acid, when the powder coating is coated on an aluminum alloy template, a hydrophobic film can be formed on the surface of the aluminum alloy template, moisture is prevented from contacting the aluminum alloy template through the film, and further the corrosion resistance of the aluminum alloy template is improved.

Description

Powder coating for wear-resistant and corrosion-resistant aluminum alloy template and preparation process thereof

Technical Field

The invention belongs to the field of coatings, and particularly relates to a powder coating for a wear-resistant anticorrosive aluminum alloy template and a preparation process thereof.

Background

The aluminum alloy template is a new generation template system appearing after a wood template and a steel template, the aluminum template is designed according to modulus, is extruded and molded by special equipment, can be freely combined according to different structural sizes, the design, research and development and construction application of the aluminum template are one great development of the building industry, the application of the aluminum template system in the building industry improves the construction efficiency of house building engineering, the aluminum alloy template can be coated with a layer of coating on the surface to protect the aluminum alloy template when being used in building materials, the coating for the aluminum alloy template is mostly powder coating, the traditional powder coating has general wear resistance, after being coated on the aluminum alloy template for a period of time, the coating can crack or even peel off under the condition of external friction, so the aluminum alloy template cannot be protected, the coating can be corroded by water, and the use of the aluminum alloy template is seriously influenced by the corrosion of the aluminum alloy template under the long-time water corrosion, and the aluminum alloy template often receives sunlight irradiation in the use process of the aluminum alloy template, and a paint film on the surface of the aluminum alloy template can perform photochemical reaction with light after receiving the sunlight irradiation, so that the paint film is damaged, the aluminum alloy template cannot be protected, and the service life of the aluminum alloy template is further shortened.

Disclosure of Invention

The invention aims to provide a powder coating for a wear-resistant anticorrosive aluminum alloy template and a preparation process thereof.

The technical problems to be solved by the invention are as follows:

1. the traditional powder coating has general wear resistance, and after the traditional powder coating is smeared on an aluminum alloy template for a period of time, a coating film can crack or even peel off under the condition of external friction, so that the aluminum alloy template cannot be protected;

2. the aluminum alloy template is often corroded by rainwater and moisture in the air in the using process, a layer of paint film is formed by coating the traditional powder coating on the aluminum alloy template, the moisture can be prevented from contacting the aluminum alloy template, but part of the moisture can penetrate through the paint film, the aluminum alloy template is corroded under the long-time moisture corrosion, and the use of the aluminum alloy template is seriously influenced;

3. the aluminum alloy template is often irradiated by sunlight in the use process, and a paint film on the surface of the aluminum alloy template can be subjected to photochemical reaction with light after being irradiated by the sunlight, so that the paint film is damaged, and the aluminum alloy template cannot be protected;

4. the powder coating can be prepared by a pulverizer, the conventional pulverizer can pulverize the pulverized raw materials for multiple times due to the pulverizing efficiency, and the manufacturing cost of equipment is high.

The purpose of the invention can be realized by the following technical scheme:

the powder coating for the wear-resistant anticorrosive aluminum alloy template is prepared from the following raw materials in parts by weight: 20-25 parts of polyvinylidene chloride, 1.5-4 parts of titanium dioxide powder, 1.5-4 parts of silicon dioxide powder, 3-5 parts of stearic acid, 4-8 parts of reinforcing agent, 1.6-2 parts of silicone oil and 2-4.5 parts of polyethylene wax;

the preparation steps of the powder coating are as follows:

step S1: weighing the raw materials according to the weight parts, adding polyvinylidene chloride, titanium dioxide powder, silicon dioxide powder, stearic acid and a reinforcing agent into a dryer, and drying for 10-15min at the temperature of 100-110 ℃ to obtain the dried raw materials;

step S2: adding the dried polyvinylidene chloride, titanium dioxide powder, silicon dioxide powder, stearic acid, reinforcing agent, silicone oil and polyethylene wax into a high-speed mixer, and mixing at the rotation speed of 500-800r/min to obtain a mixture;

step S3: adding the mixture prepared in the step S2 into a double-screw extruder, extruding at the temperature of 198-205 ℃, cooling and granulating to prepare particles;

step S4: turning on a first motor and a second motor, adding the particles prepared in the step S3 into a crushing bin body through a feed inlet, driving a transmission rotating shaft to rotate by the second motor, driving a main transmission gear to rotate by the transmission rotating shaft and further driving an auxiliary transmission gear to rotate, so that a main crushing roller and an auxiliary crushing roller work, preliminarily crushing the particle mixture, driving a sieve plate to rotate by the first motor, enabling the preliminarily crushed particle mixture to pass through a first opening and a second opening, intercepting large particles by a sieve material device to be continuously crushed by the main crushing roller and the auxiliary crushing roller, driving the first crushing plate and a crushing side shaft to rotate by the crushing shaft, driving the second crushing plate to move by the crushing side shaft, secondarily crushing the particle mixture, enabling the secondarily crushed particle mixture to pass through a first partition plate discharge port to be accumulated on the sieve plate, driving the first rotating wheel to rotate by the second rotating wheel so as to enable a cam to rotate, and enabling a cam top plate to move up and down, and then the sieve plate is driven to shake up and down, so that the particle mixture with the fineness of 40-45 mu m passes through the sieve plate, the particle mixture with the fineness of less than 40-45 mu m is continuously crushed to the fineness of 40-45 mu m under the action of the first crushing knife and the second crushing knife, and the powder coating is collected by a discharge port to prepare the powder coating for the wear-resistant and corrosion-resistant aluminum alloy template.

Further, the preparation steps of the reinforcing agent are as follows:

step A1: adding m-diiodobenzene, aniline, N' -dimethyl ethylenediamine, potassium phosphate and copper powder into a reaction kettle, and reacting for 10-15h at the temperature of 120-150 ℃ to obtain an intermediate 1;

the reaction process is as follows:

step A2: adding the intermediate 1 and ethanol into a reaction kettle, stirring at the rotation speed of 300-500r/min until the intermediate 1 is completely dissolved, continuously stirring at the temperature of 40-50 ℃, dropwise adding mixed acid, and reacting at the temperature of 50-65 ℃ for 1-1.2h after dropwise adding to obtain an intermediate 2;

the reaction process is as follows:

step A3: adding tin particles, the intermediate 2 prepared in the step A2 and ethanol into a reaction kettle, stirring and adding concentrated hydrochloric acid under the condition that the rotating speed is 300-500r/min, heating for 30-50min at the temperature of 100 ℃, stopping heating until the reactant is cooled to room temperature, continuing stirring and adding a sodium hydroxide solution until the solution is alkaline to prepare an intermediate 3;

the reaction process is as follows:

step A4: adding the intermediate 3 prepared in the step A3 and a dilute sulfuric acid solution into a stirring kettle, stirring and dropwise adding a sodium dichromate solution under the conditions that the temperature is 3-5 ℃ and the rotating speed is 300-;

the reaction process is as follows:

step A5, adding the intermediate 4 prepared in the step A4, ethanol and a dilute hydrochloric acid solution into a reaction kettle, stirring the mixture under the condition that the rotation speed is 300-500r/min until the intermediate 4 is completely dissolved, dropwise adding a sodium nitrite solution at the temperature of-5-0 ℃, and after dropwise adding, dropwise adding a boiling 50% sulfuric acid solution at the temperature of 8-10 ℃ to react for 1-1.5h to prepare an intermediate 5;

the reaction process is as follows:

step A6: and B, adding the intermediate 5 prepared in the step A5, aluminum powder and triphenoxy aluminum into a reaction kettle, heating until the temperature reaches 145-plus-150 ℃, preserving the heat for 3-4h, adding isobutene, and reacting for 3-4h under the condition that the temperature is 130-plus-135 ℃ to prepare the reinforcing agent.

The reaction process is as follows:

further, the stoichiometric ratio of m-diiodobenzene to aniline in the step A1 is 1:2, the molar concentration of N, N' -dimethylethylenediamine in the reaction is 20%, the molar concentration of copper powder in the reaction is 10%, the amount of aluminum phosphate is two equivalents, the amount of intermediate and mixed acid in the step A2 is 1 g: 1.6m L, the amount of tin particles, intermediate 2 and concentrated hydrochloric acid in the step A3 is 2 g: 1 g: 5m L, the amount of intermediate 3, the first dropwise added sodium dichromate solution and the second dropwise added sodium dichromate solution in the step A4 is 1 g: 4m L: 6m L, the amount of intermediate 4, the dilute hydrochloric acid solution and the sodium nitrite in the step A5 is 0.3 g: 1m L: 0.315g, and the amount of intermediate 5, the aluminum powder, the triphenoxy aluminum and the isobutylene in the step A6 is 10: 2: 1: 20 by mass.

Further, the mixed acid in the step a2 is formed by mixing a nitric acid solution with a mass fraction of 68% and a sulfuric acid solution with a mass fraction of 70% in a volume ratio of 7.3: 10, the concentration of the concentrated hydrochloric acid in the step A3 is 12 mol/L, the mass fraction of sodium hydroxide in the sodium hydroxide solution is 50%, the mass fraction of sulfuric acid in the dilute sulfuric acid solution in the step a4 is 15.5% -15.8%, the mass fraction of potassium dichromate in the potassium dichromate solution dripped for the first time is 28% -28.6%, the mass fraction of potassium dichromate in the potassium dichromate solution dripped for the second time is 23% -25%, the mass fraction of hydrochloric acid in the dilute hydrochloric acid solution in the step a5 is 15% -18%, and the mass fraction of sodium nitrite in the sodium nitrite solution is 30% -40%.

Further, the pulverizer described in step S4 includes a pulverizing cabin, a feed inlet is provided at the top of the outside of the pulverizing cabin, a discharge outlet is provided at the bottom of the outside of the pulverizing cabin, a valve is provided inside the discharge outlet, a first motor is fixed at the center of the bottom of the outside of the pulverizing cabin, a pulverizing shaft is fixed at the output end of the first motor, the pulverizing shaft passes through the side wall of the pulverizing cabin, the pulverizing shaft is rotatably connected with the side wall of the pulverizing cabin, a plurality of first pulverizing plates are fixed at the two sides of the pulverizing shaft, a pulverizing cross bar and a pulverizing side shaft are fixed at the two sides of the pulverizing shaft, the pulverizing side shaft is located between the pulverizing cross bar and the first pulverizing plate, a plurality of first pulverizing knives are fixed at the lower surface of the pulverizing cross bar, a plurality of second pulverizing plates are fixed at the two sides of the pulverizing side shaft, the second pulverizing plates and the first pulverizing plates are arranged in a staggered manner, a first partition plate is fixed inside of the pulverizing, a first clapboard feed opening is arranged at the center of the first clapboard, a rotating groove is arranged on the first clapboard, a crushing side shaft passes through the rotating groove, the crushing side shaft is connected with the rotating groove in a sliding way, a second clapboard is fixed in the crushing bin body and positioned above the first crushing plate, a material sieving device is arranged at the center of the second clapboard, a sieve plate is arranged in the crushing bin body and positioned below a crushing cross rod, a plurality of third crushing plates are fixed on the side wall in the crushing bin body and positioned between the first clapboard and the second clapboard, the third crushing plates and the second crushing plates are arranged in a staggered way, a fixed plate is fixed on the side wall outside the crushing bin body, a second motor is fixed on the upper surface of the fixed plate, a transmission rotating shaft is fixed at the output end of the second motor and passes through the side wall of the crushing bin body and is rotationally connected with the side wall of the crushing bin body, a main transmission gear and a second rotating wheel are fixed on the transmission rotating shaft, the main transmission gear and the second rotating wheel are located outside the crushing bin body, a main crushing roller is fixed on the end of the transmission rotating shaft, auxiliary transmission gears are arranged on two sides of the main transmission gear respectively and meshed with the main transmission gear, a transmission auxiliary shaft is fixed on the auxiliary transmission gear and penetrates through the side wall of the crushing bin body, the transmission auxiliary shaft is rotatably connected with the side wall of the crushing bin body, an auxiliary crushing roller is fixed on the end of the transmission auxiliary shaft, the main crushing roller and the auxiliary crushing roller are located inside the crushing bin body, and a plurality of second crushing teeth are fixed on the main crushing roller and the auxiliary crushing roller.

Furthermore, the outside bottom mounting of crushing storehouse body have four evenly distributed's support column, the bottom mounting of support column has the base, both sides are fixed with a plurality of first crushing teeth about first crushing board, second crushing board, the third crushing board.

Furthermore, sieve glassware on open and to have two first openings, first opening runs through sieve glassware, the inside of sieve glassware is equipped with the sieve flitch, it has two second openings to open on the sieve flitch, the second opening runs through sieve flitch, crushing axle passes through sieve flitch, sieve flitch and crushing axle fixed connection, crushing axle rotates with the lateral wall of sieve glassware to be connected.

Furthermore, a first slide bar is fixed at the center of two sides of the sieve plate, a chute is arranged on the side wall of the crushing bin body, the first slide bar is matched with the chute, a second slide bar is fixed at the center of one side of the sieve plate close to the second motor, a through-hole chute is arranged on the side wall of the crushing bin body close to the second motor, the second slide bar penetrates through the side wall of the second motor, the second slide bar is matched with the through-hole chute, a cam top plate is fixed at the end of the second slide bar, three cover plates are respectively fixed on the upper surface and the lower surface of the sieve plate, the cover plates are positioned at the connecting parts of the first slide bar, the second slide bar and the sieve plate, the cover plates are attached to the side wall of the crushing bin body, a crushing strip is arranged on the upper surface of the sieve plate, a plurality of second crushing knives are fixed on the crushing strip, the second crushing knives are matched with the first crushing knives, the crushing shaft penetrates, the end of camshaft rotates with the lateral wall of smashing the storehouse body and is connected, is fixed with first runner on the camshaft, installs driving belt between first runner and the second runner, and the cam is laminated mutually with the cam roof.

The invention has the beneficial effects that: the powder coating prepared by the invention contains stearic acid, the stearic acid contains carboxyl and long-chain alkyl, the carboxyl is hydrophilic group, the long-chain alkyl is hydrophobic group, when the powder coating is coated on an aluminum alloy template, the polarity of the carboxyl is mostly adsorbed on the surface of the aluminum alloy template, so that the long-chain alkyl forms a hydrophobic film on the surface of the aluminum alloy template, and the moisture is prevented from contacting with the aluminum alloy template through the film, thereby improving the corrosion resistance of the aluminum alloy template, the titanium dioxide powder and the silicon dioxide powder are wear-resistant inorganic fillers, increasing the wear resistance of the aluminum alloy template, the titanium dioxide powder is also a light shielding agent capable of effectively reflecting ultraviolet light, a reinforcing agent is prepared in the process of preparing the powder coating, the reinforcing agent contains a benzoquinone structure, the benzoquinone structure has good light shielding property, the reinforcing agent contains a hindered phenol structure, and a single reinforcing agent, the hydrogen atoms have considerable activity, can be transferred to react with active radicals to generate macromolecular hydroperoxide, and generate stable radicals by self, thereby stopping the transfer and growth of radical chains, preventing the performance of the powder coating from being reduced due to sunlight irradiation and being incapable of protecting the aluminum alloy template, and further improving the light resistance of the powder coating; and the pulverizer is used in the process of preparing the powder coating, the pulverizer intercepts part of overlarge particle mixtures through the sieving device and continuously pulverizes the overlarge particle mixtures by the main pulverizing roller and the auxiliary pulverizing roller, the blanking speed of the particle mixtures is reduced through the first opening and the second opening, the pulverizing degree of the particle mixtures is ensured, the sieve plate is used for separating the completely pulverized particle mixtures from the incompletely pulverized particle mixtures, the completely pulverized particle mixtures are prevented from being continuously pulverized, the pulverizing efficiency is further reduced, the sieving speed of the completely pulverized particle mixtures is accelerated by the matching of the sieve plate and the cam, the pulverizing efficiency is further improved, meanwhile, a vibration device is not required to be additionally arranged, and the equipment manufacturing cost is further reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the crusher of the present invention;

FIG. 2 is a rear view of the shredder of the present invention;

FIG. 3 is a top view of the shredder of the present invention;

FIG. 4 is a bottom view of the crushing bin body of the present invention;

FIG. 5 is a top view of a first separator plate according to the present invention;

FIG. 6 is a top view of a second separator plate according to the present invention;

FIG. 7 is a schematic view of the construction of the screen of the present invention;

FIG. 8 is a top view of a screen panel of the present invention;

figure 9 is a top view of a screen panel according to the present invention.

In the figure: 1. a crushing bin body; 11. a feed inlet; 12. a discharge port; 13. a support pillar; 14. a base; 15. a first motor; 151. a crushing shaft; 1511. a first crushing plate; 152. crushing the cross bar; 1521. a first crushing cutter; 153. a crushing side shaft; 1531. a second crushing plate; 154. a first crushing tooth; 16. a first separator; 161. a first clapboard feed opening; 162. a rotating groove; 17. a second separator; 171. a material screening device; 1711. a first opening; 172. a material sieving plate; 1721. a second opening; 18. a sieve plate; 181. a first slide bar; 182. a chute; 183. a second slide bar; 1831. a cam top plate; 184. a cover plate; 185. crushing the strips; 1851. a second crushing cutter; 186. a cam; 1861. a camshaft; 1862. a first runner; 19. a third crushing plate; 2. a fixing plate; 21. a second motor; 211. a transmission rotating shaft; 212. a main drive gear; 213. a second runner; 214. a main crushing roller; 215. a second crushing tooth; 22. a secondary drive gear; 221. a transmission counter shaft; 222. an auxiliary crushing roller; 23. a drive belt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The powder coating for the wear-resistant anticorrosive aluminum alloy template is prepared from the following raw materials in parts by weight: 20 parts of polyvinylidene chloride, 1.5 parts of titanium dioxide powder, 1.5 parts of silicon dioxide powder, 3 parts of stearic acid, 4 parts of reinforcing agent, 1.6 parts of silicone oil and 2 parts of polyethylene wax;

the preparation steps of the powder coating are as follows:

step S1: weighing the raw materials according to the weight parts, adding polyvinylidene chloride, titanium dioxide powder, silicon dioxide powder, stearic acid and a reinforcing agent into a dryer, and drying for 10min at the temperature of 100 ℃ to obtain the dried raw materials;

step S2: adding the dried polyvinylidene chloride, titanium dioxide powder, silicon dioxide powder, stearic acid, reinforcing agent, silicone oil and polyethylene wax into a high-speed mixer, and mixing at the rotating speed of 500r/min to obtain a mixture;

step S3: adding the mixture prepared in the step S2 into a double-screw extruder, extruding at 198 ℃, cooling and granulating to obtain particles;

step S4: and (5) adding the particles prepared in the step (S3) into a grinder to be ground, and screening the particles by a 40-micron screen to prepare the powder coating for the wear-resistant and corrosion-resistant aluminum alloy template.

The preparation steps of the reinforcing agent are as follows:

step A1: adding m-diiodobenzene, aniline, N' -dimethylethylenediamine, potassium phosphate and copper powder into a reaction kettle, and reacting for 15 hours at the temperature of 150 ℃ to obtain an intermediate 1;

step A2: adding the intermediate 1 and ethanol into a reaction kettle, stirring at the rotation speed of 500r/min until the intermediate 1 is completely dissolved, continuously stirring at the temperature of 50 ℃, dropwise adding mixed acid, and reacting at the temperature of 65 ℃ for 1.2h after dropwise adding to obtain an intermediate 2;

step A3: adding tin particles, the intermediate 2 prepared in the step A2 and ethanol into a reaction kettle, stirring and adding concentrated hydrochloric acid under the condition that the rotating speed is 500r/min, heating for 50min under the condition that the temperature is 100 ℃, stopping heating until reactants are cooled to room temperature, continuously stirring, and adding a sodium hydroxide solution until the solution is alkaline to prepare an intermediate 3;

step A4: adding the intermediate 3 prepared in the step A3 and a dilute sulfuric acid solution into a stirring kettle, stirring and dropwise adding a sodium dichromate solution under the conditions that the temperature is 5 ℃ and the rotating speed is 500r/min, continuously stirring for 1.2 hours after dropwise adding, dropwise adding the sodium dichromate solution, and continuously stirring for 1.2 hours after dropwise adding to prepare an intermediate 4;

step A5, adding the intermediate 4 prepared in the step A4, ethanol and a dilute hydrochloric acid solution into a reaction kettle, stirring the mixture at the rotation speed of 500r/min until the intermediate 4 is completely dissolved, dropwise adding a sodium nitrite solution at the temperature of 0 ℃, and dropwise adding a boiling 50% sulfuric acid solution at the temperature of 10 ℃ after dropwise adding to react for 1.5 hours to prepare an intermediate 5;

step A6: and D, adding the intermediate 5 prepared in the step A5, aluminum powder and triphenoxy aluminum into a reaction kettle, heating until the temperature reaches 150 ℃, preserving the heat for 4 hours, adding isobutene, and reacting for 4 hours at the temperature of 135 ℃ to prepare the reinforcing agent.

Example 2

The powder coating for the wear-resistant anticorrosive aluminum alloy template is prepared from the following raw materials in parts by weight: 23 parts of polyvinylidene chloride, 3 parts of titanium dioxide powder, 3 parts of silicon dioxide powder, 4 parts of stearic acid, 6 parts of reinforcing agent, 1.8 parts of silicone oil and 3 parts of polyethylene wax;

the preparation steps of the powder coating are as follows:

step S1: weighing the raw materials according to the weight parts, adding polyvinylidene chloride, titanium dioxide powder, silicon dioxide powder, stearic acid and a reinforcing agent into a dryer, and drying for 13min at the temperature of 105 ℃ to obtain the dried raw materials;

step S2: adding the dried polyvinylidene chloride, titanium dioxide powder, silicon dioxide powder, stearic acid, reinforcing agent, silicone oil and polyethylene wax into a high-speed mixer, and mixing at the rotating speed of 650r/min to obtain a mixture;

step S3: adding the mixture prepared in the step S2 into a double-screw extruder, extruding at the temperature of 200 ℃, cooling and granulating to prepare particles;

step S4: and (5) adding the particles prepared in the step (S3) into a grinder to be ground, and screening the particles by a 43-micron screen to prepare the powder coating for the wear-resistant and corrosion-resistant aluminum alloy template.

Example 3

The powder coating for the wear-resistant anticorrosive aluminum alloy template is prepared from the following raw materials in parts by weight: 25 parts of polyvinylidene chloride, 4 parts of titanium dioxide powder, 4 parts of silicon dioxide powder, 5 parts of stearic acid, 8 parts of reinforcing agent, 2 parts of silicone oil and 4.5 parts of polyethylene wax;

the preparation steps of the powder coating are as follows:

step S1: weighing the raw materials according to the weight parts, adding polyvinylidene chloride, titanium dioxide powder, silicon dioxide powder, stearic acid and a reinforcing agent into a dryer, and drying for 15min at the temperature of 110 ℃ to obtain the dried raw materials;

step S2: adding the dried polyvinylidene chloride, titanium dioxide powder, silicon dioxide powder, stearic acid, reinforcing agent, silicone oil and polyethylene wax into a high-speed mixer, and mixing at the rotating speed of 800r/min to obtain a mixture;

step S3: adding the mixture prepared in the step S2 into a double-screw extruder, extruding at the temperature of 205 ℃, cooling and granulating to prepare particles;

step S4: and (5) adding the particles prepared in the step (S3) into a grinder to be ground, and screening the particles through a 45-micron screen to prepare the powder coating for the wear-resistant and corrosion-resistant aluminum alloy template.

Comparative example 1

Compared with example 1, the reinforcing agent is added in the comparative example, and the rest preparation method is the same as example 1.

Comparative example 2

The comparative example is a powder coating for an aluminum alloy template which is common in the market.

The powder coatings prepared in examples 1 to 3 and comparative examples 1 to 2 were subjected to performance tests, the results of which are shown in table 1 below;

wear resistance: testing the powder coating according to the GB/T1732-1993, observing the powder coating by using a four-fold magnifier to judge whether the paint film has cracks, wrinkles and peeling phenomena, testing the powder coating according to the GB/T6739-2006, and recording the test result;

corrosion resistance: testing the powder coating by adopting a first-method soaking experimental method according to the regulation of GB/T1733-1993, and observing whether a paint film has light loss, color change, bubbles, wrinkles, falling off and rust on a test plate;

light resistance: powder coatings were tested according to the specifications of GB/T1865-1997 and rated according to the standard of GB/T1766-1995;

TABLE 1

As is apparent from Table 1 above, the powder coatings prepared in examples 1 to 3 are better in abrasion resistance, corrosion resistance and light resistance than those of comparative examples 1 to 2, and therefore the powder coatings prepared in accordance with the present invention are excellent in abrasion resistance, corrosion resistance and light resistance.

Referring to fig. 1-9, the pulverizer used in the above embodiment includes a pulverizing cabin 1, a feed inlet 11 is disposed at the top of the exterior of the pulverizing cabin 1, a discharge outlet 12 is disposed at the bottom of the exterior of the pulverizing cabin 1, a valve is disposed inside the discharge outlet 12, a first motor 15 is fixed at the center of the bottom of the exterior of the pulverizing cabin 1, a pulverizing shaft 151 is fixed at the output end of the first motor 15, the pulverizing shaft 151 passes through the side wall of the pulverizing cabin 1, the pulverizing shaft 151 is rotatably connected with the side wall of the pulverizing cabin 1, a plurality of first pulverizing plates 1511 are fixed at two sides of the pulverizing shaft 151, a pulverizing cross bar 152 and a pulverizing side shaft 153 are fixed at two sides of the pulverizing shaft 151, the pulverizing side shaft 153 is located between the pulverizing cross bar 152 and the first pulverizing plate 1511, a plurality of first pulverizing knives are fixed at the lower surface of the pulverizing cross bar 152, a plurality of second pulverizing plates 1531 are fixed at two sides of the pulverizing side shaft 153, the second pulverizing plates, a first clapboard 16 is fixed in the crushing bin body 1, the first clapboard 16 is positioned between a first crushing plate 1511 and a crushing side shaft 153, the center of the first clapboard 16 is provided with a first clapboard feed opening 161, the first clapboard 16 is provided with a rotating groove 162, the crushing side shaft 153 passes through the rotating groove 162, the crushing side shaft 153 is connected with the rotating groove 162 in a sliding way, the crushing bin body 1 is internally fixed with a second clapboard 17, the second clapboard 17 is positioned above the first crushing plate 1511, the center of the second clapboard 17 is provided with a material sieving device 171, the crushing bin body 1 is internally provided with a sieve plate 18, the sieve plate 18 is positioned below a crushing cross bar 152, the side wall in the crushing bin body 1 is fixed with a plurality of third crushing plates 19, the third crushing plates 19 are positioned between the first clapboard 16 and the second clapboard 17, the third crushing plates 19 are arranged in a staggered way with the second crushing plate 1531, the outer side wall of the crushing bin body 1 is fixed with a fixing plate 2, the upper surface of the fixing plate 2 is fixed with a second motor 21, the output end of the second motor 21 is fixed with a transmission rotating shaft 211, the transmission rotating shaft 211 penetrates through the side wall of the crushing bin body 1, the transmission rotating shaft 211 is rotatably connected with the side wall of the crushing bin body 1, a main transmission gear 212 and a second rotating wheel 213 are fixed on the transmission rotating shaft 211, the main transmission gear 212 and the second rotating wheel 213 are located outside the crushing bin body 1, a main crushing roller 214 is fixed on the end of the transmission rotating shaft 211, auxiliary transmission gears 22 are respectively arranged on two sides of the main transmission gear 212, the auxiliary transmission gears 22 are meshed with the main transmission gear 212, a transmission auxiliary shaft 221 is fixed on the auxiliary transmission gear 22, the transmission auxiliary shaft 221 penetrates through the side wall of the crushing bin body 1, the transmission auxiliary shaft 221 is rotatably connected with the side wall of the crushing bin body 1, an auxiliary crushing roller 222 is fixed on the end of the transmission auxiliary shaft 221, the main crushing roller 214 and the auxiliary crushing roller 222 are located inside the crushing bin body 1.

As shown in fig. 1, four supporting columns 13 are fixed at the bottom of the exterior of the crushing bin 1, the supporting columns 13 are uniformly distributed, the base 14 is fixed at the bottom of the supporting columns 13, and a plurality of first crushing teeth 154 are fixed at the upper and lower sides of the first crushing plate 1511, the second crushing plate 1531 and the third crushing plate 19.

As shown in fig. 6-8, the material sieving device 171 is provided with two first openings 1711, the first openings 1711 penetrate through the material sieving device 171, the material sieving plate 172 is disposed inside the material sieving device 171, the material sieving plate 172 is provided with two second openings 1721, the second openings 1721 penetrate through the material sieving plate 172, the pulverizing shaft 151 penetrates through the material sieving plate 172, the material sieving plate 172 is fixedly connected with the pulverizing shaft 151, and the pulverizing shaft 151 is rotatably connected with the side wall of the material sieving device 171.

As shown in fig. 1-2 and fig. 9, a first sliding bar 181 is fixed at the center of two sides of the screen plate 18, a chute 182 is formed on the side wall of the milling bin 1, the first sliding bar 181 is matched with the chute 182, a second sliding bar 183 is fixed at the center of one side of the screen plate 18 close to the second motor 21, a through-hole chute is formed on the side wall of the milling bin 1 close to the second motor 21, the second sliding bar 183 passes through the side wall of the second motor 21, the second sliding bar 183 is matched with the through-hole chute, a cam top plate 1831 is fixed at the end of the second sliding bar 183, three cover plates 184 are respectively fixed on the upper and lower surfaces of the screen plate 18, the cover plates 184 are located at the connection positions of the first sliding bar 181 and the second sliding bar 183 with the screen plate 18, the cover plates 184 are attached to the side wall of the milling bin 1, a milling bar 185 is arranged on the upper surface of the screen plate 18, a plurality of second milling knives 1851 are fixed, crushing axle 151 passes sieve 18, and crushing axle 151 is connected with sieve 18 rotation, and the outside of crushing storehouse body 1 is equipped with cam 186, is fixed with camshaft 1861 on the cam 186, and the end of camshaft 1861 rotates with the lateral wall of crushing storehouse body 1 to be connected, is fixed with first runner 1862 on the camshaft 1861, installs driving belt 23 between first runner 1862 and the second runner 213, and cam 186 is laminated mutually with cam roof 1831.

Example procedure for the pulverizer to prepare powder coating:

turning on a first motor 15 and a second motor 21, adding the particle mixture into the crushing bin body 1 from the feed port 11, driving a transmission rotating shaft 211 to rotate by the second motor 21, driving a main transmission gear 212 to rotate by the transmission rotating shaft 211 so as to drive an auxiliary transmission gear 22 to rotate, enabling a main crushing roller 241 and an auxiliary crushing roller 222 to work, primarily crushing the particle mixture, driving a screening plate 172 to rotate by the first motor 15, enabling the primarily crushed particle mixture to pass through a first opening 1711 and a second opening 1721, intercepting large particles by the screening device 171 to continue to be crushed by the main crushing roller 241 and the auxiliary crushing roller 222, driving a first crushing plate 1511 and a crushing side shaft 153 to rotate by a crushing shaft 151, driving a second crushing plate 1531 to move by the crushing side shaft 153, secondarily crushing the particle mixture, enabling the secondarily crushed particle mixture to pass through a first partition plate lower feed port 161 to be stacked on a screening plate 18, driving a first rotating wheel 1862 to rotate by the second rotating wheel 213 so as to enable a cam 186 to rotate, the cam 186 enables the cam top plate 1831 to move up and down, and further drives the sieve plate 18 to shake up and down, so that the particle mixture with the fineness of 40-45 μm passes through the sieve plate 18, the particle mixture without the fineness of 40-45 μm is continuously crushed to the fineness of 40-45 μm under the action of the first crushing knife 1521 and the second crushing knife 1851, and the powder is collected by the discharge port 12 to prepare the powder coating for the wear-resistant and corrosion-resistant aluminum alloy template.

The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.

Claims

1. The powder coating for the wear-resistant and corrosion-resistant aluminum alloy template is characterized in that: the feed is prepared from the following raw materials in parts by weight: 20-25 parts of polyvinylidene chloride, 1.5-4 parts of titanium dioxide powder, 1.5-4 parts of silicon dioxide powder, 3-5 parts of stearic acid, 4-8 parts of reinforcing agent, 1.6-2 parts of silicone oil and 2-4.5 parts of polyethylene wax; the preparation steps of the powder coating are as follows:

step S4: and (5) adding the particles prepared in the step (S3) into a grinder to be ground, and screening the particles through a 40-45 mu m screen to prepare the powder coating for the wear-resistant and corrosion-resistant aluminum alloy template.

2. The powder coating for the wear-resistant and corrosion-resistant aluminum alloy template as claimed in claim 1, wherein: the preparation steps of the reinforcing agent are as follows:

3. The powder coating for the wear-resistant and corrosion-resistant aluminum alloy template as claimed in claim 2, wherein the stoichiometric ratio of m-diiodobenzene to aniline in step A1 is 1:2, the molar concentration of N, N' -dimethylethylenediamine in the reaction is 20%, the molar concentration of copper powder in the reaction is 10%, the amount of aluminum phosphate is two equivalents, the amount ratio of the intermediate to mixed acid in step A2 is 1 g: 1.6m L, the amount ratio of tin particles, intermediate 2 and concentrated hydrochloric acid in step A3 is 2 g: 1 g: 5m L, the amount ratio of intermediate 3, the first dropwise added sodium dichromate solution and the second dropwise added sodium dichromate solution in step A4 is 1 g: 4m L: 6m L, the amount ratio of intermediate 4, the dilute hydrochloric acid solution and the sodium nitrite in step A5 is 0.3 g: 1m L: 0.315g, and the amount ratio of aluminum powder in step A6 is 10: 2: 20.

4. The powder coating for the wear-resistant anticorrosive aluminum alloy template according to claim 2, wherein the mixed acid in the step A2 is formed by mixing a nitric acid solution with a mass fraction of 68% and a sulfuric acid solution with a mass fraction of 70% in a volume ratio of 7.3: 10, the concentrated hydrochloric acid in the step A3 is 12 mol/L, the sodium hydroxide in the sodium hydroxide solution is 50%, the sulfuric acid in the dilute sulfuric acid solution in the step A4 is 15.5% -15.8%, the potassium dichromate in the potassium dichromate solution dripped for the first time is 28% -28.6%, the potassium dichromate in the potassium dichromate solution dripped for the second time is 23% -25%, the hydrochloric acid in the dilute hydrochloric acid solution in the step A5 is 15% -18%, and the sodium nitrite in the sodium nitrite solution is 30% -40%.

5. The powder coating for the wear-resistant and corrosion-resistant aluminum alloy template as claimed in claim 1, wherein: the grinder comprises a grinding bin body (1), a feed inlet (11) is formed in the top of the outer portion of the grinding bin body (1), a discharge outlet (12) is formed in the bottom of the outer portion of the grinding bin body (1), a valve is arranged inside the discharge outlet (12), a first motor (15) is fixed at the center of the bottom of the outer portion of the grinding bin body (1), a grinding shaft (151) is fixed at the output end of the first motor (15), the grinding shaft (151) penetrates through the side wall of the grinding bin body (1), the grinding shaft (151) is rotatably connected with the side wall of the grinding bin body (1), a plurality of first grinding plates (1511) are fixed on two sides of the grinding shaft (151), a grinding cross rod (152) and a grinding side shaft (153) are further fixed on two sides of the grinding shaft (151), the grinding side shaft (153) is located between the grinding cross rod (152) and the first grinding plates (1511), a plurality of first grinding knives (1521) are fixed on the lower surface of the, a plurality of second crushing plates (1531) are fixed on two sides of the crushing side shaft (153), the second crushing plates (1531) and the first crushing plates (1511) are arranged in a staggered manner, a first clapboard (16) is fixed in the crushing bin body (1), the first clapboard (16) is positioned between the first crushing plate (1511) and the crushing side shaft (153), a first clapboard feed opening (161) is arranged at the center of the first clapboard (16), a rotating groove (162) is arranged on the first clapboard (16), the crushing side shaft (153) passes through the rotating groove (162), the crushing side shaft (153) is in sliding connection with the rotating groove (162), a second clapboard (17) is fixed in the crushing bin body (1), the second clapboard (17) is positioned above the first crushing plate (1511), a material sieving device (171) is arranged at the center of the second clapboard (17), a sieve plate (18) is arranged in the bin body crushing bin body (1), and the sieve plate (18) is positioned below the crushing cross bar (152), a plurality of third crushing plates (19) are fixed on the inner side wall of the crushing bin body (1), the third crushing plates (19) are positioned between the first partition plate (16) and the second partition plate (17), the third crushing plates (19) and the second crushing plates (1531) are arranged in a staggered manner, a fixing plate (2) is fixed on the outer side wall of the crushing bin body (1), a second motor (21) is fixed on the upper surface of the fixing plate (2), a transmission rotating shaft (211) is fixed at the output end of the second motor (21), the transmission rotating shaft (211) penetrates through the side wall of the crushing bin body (1), the transmission rotating shaft (211) is rotatably connected with the side wall of the crushing bin body (1), a main transmission gear (212) and a second rotating wheel (213) are fixed on the transmission rotating shaft (211), the main transmission gear (212) and the second rotating wheel (213) are positioned outside the crushing bin body (1), a main crushing roller (214) is fixed on the end of the transmission rotating shaft (211, two sides of the main transmission gear (212) are respectively provided with an auxiliary transmission gear (22), the auxiliary transmission gear (22) is meshed with the main transmission gear (212), a transmission auxiliary shaft (221) is fixed on the auxiliary transmission gear (22), the transmission auxiliary shaft (221) penetrates through the side wall of the crushing bin body (1), the transmission auxiliary shaft (221) is rotatably connected with the side wall of the crushing bin body (1), an auxiliary crushing roller (222) is fixed on the end head of the transmission auxiliary shaft (221), the main crushing roller (214) and the auxiliary crushing roller (222) are located inside the crushing bin body (1), and a plurality of second crushing teeth (215) are fixed on the main crushing roller (214) and the auxiliary crushing roller (222).

6. The powder coating for the wear-resistant and corrosion-resistant aluminum alloy template as claimed in claim 5, wherein: the external bottom end of the crushing bin body (1) is fixed with four uniformly distributed supporting columns (13), the bottom end of each supporting column (13) is fixed with a base (14), and a plurality of first crushing teeth (154) are fixed on the upper side and the lower side of a first crushing plate (1511), a second crushing plate (1531) and a third crushing plate (19).

7. The powder coating for the wear-resistant and corrosion-resistant aluminum alloy template as claimed in claim 5, wherein: sieve glassware (171) on open and to have two first openings (1711), sieve glassware (171) is run through in first opening (1711), the inside of sieve glassware (171) is equipped with sieve flitch (172), it has two second openings (1721) to open on sieve flitch (172), sieve flitch (172) are run through in second opening (1721), crushing axle (151) are worn sieve flitch (172), sieve flitch (172) and crushing axle (151) fixed connection, crushing axle (151) are connected with the lateral wall rotation of sieve glassware (171).

8. The powder coating for the wear-resistant and corrosion-resistant aluminum alloy template as claimed in claim 5, wherein: the center of two sides of the sieve plate (18) is fixed with a first sliding bar (181), the side wall of the crushing bin body (1) is provided with a sliding groove (182), the first sliding bar (181) is matched with the sliding groove (182), the center of one side of the sieve plate (18) close to the second motor (21) is fixed with a second sliding bar (183), the side wall of the crushing bin body (1) close to the second motor (21) is provided with a through hole sliding groove, the second sliding bar (183) passes through the side wall of the second motor (21), the second sliding bar (183) is matched with the through hole sliding groove, the end of the second sliding bar (183) is fixed with a cam top plate (1831), the upper surface and the lower surface of the sieve plate (18) are respectively fixed with three cover plates (184), the cover plates (184) are positioned at the connecting positions of the first sliding bar (181) and the second sliding bar (183) and the sieve plate (18), the cover plates (184) are attached to the side wall of the crushing bin body (, be fixed with a plurality of second on crushing strip (185) and smash sword (1851), second is smashed sword (1851) and is cooperated with first crushing sword (1521), crushing axle (151) pass sieve (18), crushing axle (151) are rotated with sieve (18) and are connected, the outside of smashing the storehouse body (1) is equipped with cam (186), be fixed with camshaft (1861) on cam (186), the end of camshaft (1861) rotates with the lateral wall of smashing the storehouse body (1) and is connected, be fixed with first runner (1862) on camshaft (1861), install driving belt (23) between first runner (1862) and second runner (213), cam (186) and cam roof (1831) are laminated mutually.

9. A preparation process of the powder coating for the wear-resistant anticorrosive aluminum alloy template, which is suitable for the wear-resistant anticorrosive aluminum alloy template in the claim 1, is characterized by comprising the following steps: the process comprises the following specific steps:

step S4: starting a first motor (15) and a second motor (21), adding the particles prepared in the step S3 into the crushing bin body (1) through a feed inlet (11), driving a transmission rotating shaft (211) to rotate by the second motor (21), driving a main transmission gear (212) to rotate by the transmission rotating shaft (211) and further driving an auxiliary transmission gear (22) to rotate, enabling a main crushing roller (241) and an auxiliary crushing roller (222) to work, primarily crushing the particle mixture, driving a screening plate (172) to rotate by the first motor (15), enabling the primarily crushed particle mixture to pass through a first opening (1711) and a second opening (1721), intercepting large particles by the screening device (171) and continuously crushing by the main crushing roller (241) and the auxiliary crushing roller (222), driving a first crushing plate (1511) and a crushing side shaft (153) to rotate by the crushing shaft (151), and driving a second crushing plate (1531) to move by the crushing side shaft (153), and (2) crushing the particle mixture for the second time, enabling the particle mixture after the secondary crushing to pass through a first partition plate feed opening (161) and be stacked on a sieve plate (18), enabling a second rotating wheel (213) to rotate to drive a first rotating wheel (1862) to rotate so as to enable a cam (186) to rotate, enabling a cam top plate (1831) to move up and down by the cam (186), further driving the sieve plate (18) to rock up and down, enabling the particle mixture with the fineness of 40-45 mu m to pass through the sieve plate (18), enabling the particle mixture without the fineness of 40-45 mu m to be crushed under the action of a first crushing knife (1521) and a second crushing knife (1851) to continue to be crushed until the fineness of the particle mixture reaches 40-45 mu m, and collecting the particle mixture by a discharge opening (12).