Disposable three-knife coating efficient canvas

Abstract

The invention relates to the technical field of canvas equipment, in particular to a disposable three-knife coating efficient canvas, which is characterized in that a chemical fiber gray cloth base material of which the surface is treated but is not coated is packaged and placed on an unwinding station of a 360-type intelligent coating machine, the machine is started, and after an acceleration button is pressed, the gray cloth can be wound along a cloth guide roller and then is wound on the cloth guide roller; the gray cloth is continuously moved forwards at a constant speed, the gray cloth is subjected to first precision coating after being discharged from a package, and the first precision coating adopts a high-wear-resistance scraper with the blade edge being 3.0 to conduct blade coating. The production efficiency is high, an innovative coating mode is adopted, on the premise that the occupied area of coating machine equipment is not increased, according to the actual production process requirements of products, the equipment is upgraded and reformed, three-knife coating can be carried out only through one-time coating and no need of repeated coating, gray cloth base materials enter the machine head from the machine tail to be wound out, and the production efficiency is greatly improved. The finished canvas is directly obtained.

Description

Technical Field

[0001] The invention relates to the technical field of oil painting canvas equipment, in particular to a disposable three-knife coating high-efficiency oil painting canvas. Background Art

[0002] Currently, most of the equipment for producing oil canvases uses coating machines that can only coat a single knife at a time. Although there are various styles of coating machines on the market, they are basically the same, including the configuration of various functional accessories on the equipment, as well as the production operation process of the products it can produce.

[0003] Coating machines that can only coat with a single knife at a time have two major fatal flaws:

[0004] 1. Low production efficiency: Conventional standardized coating machines are generally equipped with 8 sections of ovens, each section is 3 meters long, which is equivalent to a 24-meter-long oven. The oven is heated by medium-pressure steam, and the maximum temperature can generally reach about 170 degrees. Under such a high temperature, the production efficiency of a single-knife coating can only reach a production speed of 25-30 meters per minute. Compared with the innovative coating method, the production efficiency of a single-knife coating is at least wasted 50% of the time. Wasting time also means wasting a lot of production costs.

[0005] 2. Large production loss: Conventional oil painting canvas, if coated with a single knife, generally needs to go through 3 coatings before a qualified finished product can be made. That is to say, each oil painting canvas needs to be coated at least 3 times on the coating machine. We all know that due to various factors and conditions, the more times the coating is repeated, the greater the waste and loss in production will inevitably be. Compared with the innovative coating method, the loss and waste rate of single knife coating will at least increase by 5%, and an additional 5% of the production cost will be wasted. It can be seen that this is a very scary number.

[0006] The above-described defects of the existing single-knife coating method are only a description of the lowest value. This is only for the finished product of the most common 3-knife coated oil canvas. Among the existing oil canvases on the market, products that exceed the 3-knife coating process can account for at least more than 50%. According to customer needs and the actual application needs of the product, some oil canvas production requires 4-knife coating, some require 5-knife coating, and some even require 8 to 10 coatings. This means that if the product requires more coatings, then if a single-knife coating method is used, the production efficiency will be lower, and the production waste and loss will be greater. In other words, the actual cost of production will increase significantly with the number of coatings. Therefore, it is urgent to design a disposable three-knife coated high-efficiency oil canvas to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a disposable three-knife coating high-efficiency oil canvas to solve the defects described in the existing single-knife coating method proposed in the above background technology. It is only a description of the lowest value. This is only for the production of the most common three-knife coated oil canvas finished product. Among the existing oil canvases on the market, products that exceed the production of three-knife coating process can account for at least more than 50%. According to customer needs and the actual application needs of the product, some oil canvas production requires 4 knife coatings, some require 5 knife coatings, and some even require 8 to 10 coatings. This means that if the product requires more coatings, then if a single-knife coating method is adopted, the production efficiency will be lower, and the production waste and loss will be greater. In other words, the actual cost of production will increase significantly with the number of coatings.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a one-time three-knife coating high-efficiency oil painting canvas:

[0009] S1. First, place the surface-treated but uncoated chemical fiber fabric base material roll (A-frame fabric roll) on the unwinding station of the 360-type (effective width 3.6 meters) intelligent coating machine. Start the machine and press the acceleration button. The fabric will move forward along the guide roller at a constant speed. After the fabric comes out of the roll, it will undergo the first precision coating.

[0010] S2, the first precision coating: a high wear-resistant scraper with a blade of 3.0 is used for scraping. The paint used is a primer specially made for weak solvent oil painting canvas. The main function of this knife is to seal the pores of the grey cloth. When the grey cloth passes through the first scraper, the scraper will scrape off the excess paint on the surface of the grey cloth. After the grey cloth passes through the scraper, a uniform layer of primer wet glue will be scraped on the surface. The grey cloth with wet glue on the surface will directly undergo the second coating after passing through the first scraper, and then enter the oven.

[0011] S3, the second precision coating: This knife is also scraped with a high-wear-resistant scraper with a blade of 3.0. The paint used is the same as that used in the first coating, which is also a primer specially made for weak solvent oil canvas. This coating mainly plays a role in weight increase and whitening. The operator of this coating stands above the needle plate track and behind the scraper. On such a manual platform, the paint is added to the front of the scraper. After the substrate is scraped by the second scraper, it will directly enter the high-temperature oven for drying, and then the third precision coating will be carried out;

[0012] S4, the third precision coating: The third precision coating is completed on the platform area of the second layer. It is also done with a high-wear-resistant scraper with a blade of 3.0. The substrate has been coated with two primers. When the third coating is done, the weak solvent high-gloss photo inkjet canvas will be completed. The last coat of glue is done with the top coat. The paint used in this coat is weak solvent high-gloss paint. If it is a weak solvent matte photo inkjet canvas, this coat is weak solvent matte paint. Return to the oven again and continue drying. When the substrate comes out of the oven, the surface has been thoroughly dried.

[0013] S5. After the substrate leaves the oven, it will move about 45 degrees downward and rearward, and directly enter the double-roll flattening combination. After the substrate comes out from between the two rollers, it directly enters the roller combination for adjusting the tension. After coming out from here, it continues to move about 45 degrees to the upper right, and finally passes over a roller. It will be automatically rolled on the A-frame for rolling until the entire coating work is completed. At this step, the entire coating process of the innovative coating method is completed.

[0014] Preferably, the 3-coating and 3-baking method is as follows: after the first coating, the substrate immediately enters a 15-meter oven for drying, and immediately enters a second coating after coming out of the oven, and immediately enters a 9-meter oven after the second coating, and immediately enters a third coating after coming out of the oven, and immediately enters a 9-meter oven for drying after the third coating, and is wound up after coming out of the oven for drying.

[0015] Preferably, the weak solvent high gloss (weak solvent matte) primer formula is:

[0016] Water: 100-350 kg

[0017] Natural stone powder A: 30-110 kg

[0018] Dispersant: 1-17 kg

[0019] Defoaming agent: 1-25 kg PVA glue: 50-300 kg

[0020] Natural stone powder E: 150-400 kg

[0021] Natural stone powder D: 50-350 kg

[0022] Natural stone powder C: 100-200 kg

[0023] Natural stone powder B: 100-350 kg VAE emulsion A: 300-600 kg VAE emulsion B: 200-500 kg

[0024] Whitening agent: 1-15 kg

[0025] Plasticizer: 5-80 kg

[0026] Surfactant: 2-50 kg.

[0027] Preferably, the weak solvent high gloss (printing ink-absorbing layer coating) topcoat coating formula: acrylic emulsion A: 600-1000 kg

[0028] Acrylic emulsion B: 250-600 kg

[0029] Surfactant A: 1-10 kg

[0030] Surfactant B: 3-30 kg

[0031] Defoaming agent: 1-10 kg

[0032] Thickener: 1-20 kg

[0033] Bridging agent: 3-15 kg

[0034] Whitening agent: 1-10 kg.

[0035] Preferably, the weak solvent matte (printing ink-absorbing layer coating) topcoat coating formula is:

[0036] Step 1: Pre-prepare matte dispersion solution

[0037] Water: 100-450 kg

[0038] Dispersant: 1-9 kg

[0039] White carbon black: 20-80 kg

[0040] Silicon dioxide: 20-60 kg

[0041] Nano adsorbent: 20-80 kg.

[0042] Preferably, the weak solvent matte (printing ink-absorbing layer coating) topcoat coating formula is:

[0043] Step 2: Prepare weak solvent matte (printing ink-absorbing layer coating) surface glue

[0044] Acrylic emulsion A: 100-400 kg

[0045] Acrylic emulsion B: 30-150 kg

[0046] Matt dispersion solution: 50-200 kg

[0047] Surfactant A: 1-20 kg

[0048] Surfactant B: 1-25 kg

[0049] Defoaming agent: 1-15 kg

[0050] Thickener: 2-20 kg

[0051] Bridging agent: 1-18 kg.

[0052] Preferably, the weak solvent high gloss (weak solvent matte) primer coating ingredient process is as follows: first add water to the barrel of the mixer, start the motor, slowly increase the speed to 1440 rpm, and then add dispersant, defoaming agent, and surfactant in turn. After adding each additive, wait 10 minutes before adding another additive.

[0053] Preferably, the weak solvent high gloss (printing ink-absorbing layer coating) topcoat coating preparation process is as follows: in the barrel of a high-speed stirring disperser, first slowly add acrylic emulsion A, then after turning on the mixer, slowly adjust the motor speed to 600 rpm, and then slowly add acrylic emulsion B, and stir directly for 30 minutes after all are added.

[0054] Preferably, the process flow of the prefabricated matte dispersion solution is as follows: first put water in the barrel of the high-speed disperser, then after turning on the mixer, slowly increase the speed of the motor to 1440 rpm, and then use a streamlined addition method to slowly add the dispersant first. After all the dispersant is added, directly disperse at high speed for 15 minutes, and then add white carbon black, silica, nano-adsorbent, etc. in the order of the formula. After all the raw materials are added, directly disperse at high speed at a speed of 1440 rpm for 60 minutes, then stop the machine and filter with a special filter for standby use.

[0055] Preferably, in the barrel of the mixer, acrylic emulsion A is first added, and then the motor speed is slowly adjusted to 800 rpm, and then acrylic emulsion B is poured in, and then the defoaming agent is added in a streamlined manner. After all the addition is completed, the mixture is directly mixed and stirred for 15 minutes.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] This one-time three-knife coating high-efficiency oil painting canvas has high production efficiency: the innovative coating method, without increasing the area occupied by the coating machine equipment, upgrades the equipment according to the actual production process requirements of the product. Only one coating is required, and no repeated coating is required. Three-knife coating can be performed. The grey cloth substrate enters from the tail of the machine and is rolled up at the head of the machine, and it is directly the finished oil painting canvas.

[0058] This one-time three-knife coated high-efficiency oil painting canvas has low production loss and waste: it adopts an innovative coating method. After the grey cloth substrate is placed in the coating machine's workstation, it only needs to be coated once, and then it can be directly coated three times. When it is rolled up at the tail of the machine, it is directly a finished product. This production method can also better guarantee the stability and consistency of the product. DETAILED DESCRIPTION

[0059] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0060] An embodiment provided by the present invention:

[0061] S1. First, place the surface-treated but uncoated chemical fiber fabric base material roll (A-frame fabric roll) on the unwinding station of the 360-type (effective width 3.6 meters) intelligent coating machine. Start the machine and press the acceleration button. The fabric will then move forward along the guide roller at a constant speed.

[0062] After the grey fabric comes out of the roll, it will first move about 50 degrees forward and downward, pass under a guide roller, and then move directly about 50 degrees forward and upward. After passing above two guide rollers (tightening frames), it will move about 85 degrees forward and downward. Finally, after passing under a guide roller, the grey fabric will pass under the manual platform for the first knife coating, and then pass through several rollers and the width-expanding rollers, and then it will undergo the first knife precision coating.

[0063] S2. First precision coating: Use a high-wear-resistant scraper with a blade of 3.0 for scraping. The paint used is a primer specially made for weak solvent oil painting canvas. The main function of this knife is to seal the pores of the fabric. When the fabric passes through the first scraper, the scraper will scrape off the excess paint on the surface of the fabric. After the fabric passes through the scraper, the surface will be coated with a uniform layer of primer wet glue.

[0064] The grey cloth with wet glue on the surface will be stretched by the tenter pins on both sides of the machine after passing the first scraper. Driven by the traction of the pins, it will continue to move forward. About 3 meters after passing the first scraper and before officially entering the drying oven, the second coating will be directly applied on the surface of the substrate that has been coated with the first coating, and then enter the drying oven.

[0065] S3, the second precision coating: This knife is also scraped with a high wear-resistant scraper with a blade of 3.0. The paint used is the same as the first knife coating, which is also a primer specially used for weak solvent oil canvas. This knife coating mainly plays a role in weight increase and whitening. The operator of this knife coating stands above the needle plate track and behind the scraper. On such a manual platform, the paint is added to the front of the scraper. After the substrate is scraped by the second knife scraper, it will directly enter the high-temperature oven for drying;

[0066] At this time, the substrate, which has been coated twice on the surface, enters the 27-meter-long high-temperature oven and moves forward at a speed of 20 meters per minute. During the entire drying process, the substrate needs to be dried in the oven at a high temperature of 80-170 degrees for more than 80 seconds. After the substrate comes out of the oven, the surface is already dry. After the substrate is separated from the needle plate, it will eventually pass under a guide roller and then move directly upward at an angle of about 90 degrees, instead of moving in the direction of winding;

[0067] After moving upward, it will first pass through two guide rollers that adjust the angle and tension, and then continue to move about 45 degrees to the upper right. Finally, the substrate will reach the platform area on the second layer above, where the third knife precision coating will be completed.

[0068] After entering this area, the substrate will first pass through the tension combination of three rollers. After coming out from here, it will move to the lower right at about 45 degrees. After passing under a guide roller, it will pass under the manual platform of the third precision coating. After passing under a guide roller, it will move directly upwards and then proceed to the third precision coating.

[0069] S4, the third precision coating: The third precision coating is completed on the platform area of the second layer. It is also done with a high-wear-resistant scraper with a blade of 3.0. The substrate has been coated with two primers. When the third coating is done, the weak solvent high-gloss photo inkjet canvas will be completed. The last coat of glue is done with the last knife. The paint used in this knife is weak solvent high-gloss paint. If you want to make weak solvent matte photo inkjet canvas, you can use weak solvent matte paint in this knife.

[0070] When the substrate is scraped by the third scraper, the excess surface glue coating will also be scraped off. After the scraper, the substrate will directly enter a 6-meter-long medium-temperature oven for drying. In the oven, it will be dried at a medium temperature of 90 to 110 degrees for 36 seconds. At the same time, in this 6-meter oven, a crawler drive method is adopted instead of a track needle plate method.

[0071] After the substrate with wet glue on the surface enters the drying oven, the back of the substrate will contact the transmission crawler. Under the support and drive of the crawler, the substrate will walk out of the drying oven at a uniform speed. Then, the substrate will follow the rotation of the crawler and return to the drying oven again to continue drying. When the substrate leaves the drying oven, the surface has been thoroughly dried.

[0072] S5. After the substrate leaves the oven, it moves about 45 degrees downward and backward and directly enters the double-roller flattening combination. After the substrate comes out from between the two rollers, it directly enters the roller combination for adjusting the tension. After coming out from here, it continues to move about 45 degrees to the upper right. Finally, after passing over a roller, it will be automatically rolled on the A-shaped frame for rolling. The rolling continues until the entire coating work is completed. At this step, the entire coating process of the innovative coating method is completed.

[0073] 3 coating and 3 baking method: After the first coating, the substrate immediately enters the 15-meter oven for drying. After coming out of the oven, it immediately enters the second coating. After the second coating, it immediately enters the 9-meter oven. After coming out of the oven, the substrate immediately enters the third coating. After the third coating, the substrate also immediately enters the 9-meter oven for drying. After coming out of the oven, it is rolled up.

[0074] 1. Formula of weak solvent high gloss (weak solvent matte) primer:

[0075] Water: 100-350 kg

[0076] Natural stone powder A: 30-110 kg

[0077] Dispersant: 1-17 kg

[0078] Defoaming agent: 1-25 kg

[0079] PVA glue: 50-300 kg

[0080] Natural stone powder E: 150-400 kg

[0081] Natural stone powder D: 50-350 kg

[0082] Natural stone powder C: 100-200 kg

[0083] Natural stone powder B: 100-350 kg

[0084] VAE Emulsion A: 300-600 kg

[0085] VAE Emulsion B: 200-500 kg

[0086] Whitening agent: 1-15 kg

[0087] Plasticizer: 5-80 kg

[0088] Surfactant: 2-50 kg.

[0089] Weak solvent high gloss (weak solvent matte) primer coating ingredients process flow:

[0090] First add water to the mixer barrel, start the motor, slowly increase the speed to 1440 rpm, then add dispersant, defoaming agent, and surfactant in turn. After adding each additive, wait 10 minutes before adding another additive.

[0091] After the surfactant has been dispersed at high speed for 10 minutes, slowly add natural stone powder A. After continuing to disperse at high speed for 30 minutes, slowly add natural stone powder E. After dispersing at high speed for 20 minutes, reduce the speed to 800 rpm.

[0092] Then add PVA emulsion, stir continuously at 800 rpm for 10 minutes, then increase the motor speed to 1440 rpm, slowly add natural stone powder B, wait for it to disperse continuously at high speed for 20 minutes, then slowly reduce the speed of the mixer motor to 800 rpm.

[0093] Then add VAE emulsion A and VAE emulsion B into the bucket in turn, and continue stirring for 20 minutes, then increase the speed to 1440 rpm, and then add natural stone powder C and natural stone powder D in turn. After all are added, directly disperse at high speed for 60 minutes, and then reduce the motor speed to 800 rpm.

[0094] Finally, adopt the same streamlined adding method, add plasticizer first, wait 10 minutes, then add whitening agent, wait until all the raw materials are added, and then continue stirring for 30 minutes. Finally, filter with a special filter and wait for use on the machine.

[0095] 2. Formula of weak solvent high gloss (printing ink-absorbing layer coating) topcoat:

[0096] Acrylic emulsion A: 600-1000 kg

[0097] Acrylic emulsion B: 250-600 kg

[0098] Surfactant A: 1-10 kg

[0099] Surfactant B: 3-30 kg

[0100] Defoaming agent: 1-10 kg

[0101] Thickener: 1-20 kg

[0102] Bridging agent: 3-15 kg

[0103] Whitening agent: 1-10 kg.

[0104] Weak solvent high gloss (printing ink-absorbing layer coating) surface adhesive coating ingredients process flow:

[0105] In the barrel of a high-speed stirring disperser, slowly add acrylic emulsion A first, then turn on the mixer, slowly adjust the motor speed to 600 rpm, and then slowly add acrylic emulsion B. After all are added, stir directly for 30 minutes.

[0106] Then, the same streamlined addition method was used: surfactant A was added first, and after waiting for 10 minutes, surfactant B was slowly added, and after waiting for another 10 minutes, the bridging agent was added. After all were added, stirring was continued for 30 minutes.

[0107] Finally, add defoaming agent, whitening agent and thickening agent in turn. After adding each additive, you need to wait for 10 minutes before adding the next additive. After all additives are added, continue stirring for 40 minutes, then stop the machine for filtration and wait for use on the machine.

[0108] 3. Formula of weak solvent matte (printing ink-absorbing layer coating) topcoat:

[0109] Step 1: Pre-prepare matte dispersion solution

[0110] Water: 100-450 kg

[0111] Dispersant: 1-9 kg

[0112] White carbon black: 20-80 kg

[0113] Silicon dioxide: 20-60 kg

[0114] Nano adsorbent: 20-80 kg.

[0115] Prefabricated matte dispersion solution batching process:

[0116] First put water in the barrel of the high-speed disperser, then turn on the mixer, slowly increase the motor speed to 1440 rpm, and then use a streamlined adding method to slowly add the dispersant. After all the dispersant is added, directly disperse it at high speed for 15 minutes, and then add white carbon black, silica, nano adsorbent, etc. in the order of the formula. After all the raw materials are added, directly disperse it at high speed at 1440 rpm for 60 minutes, then stop the machine and filter it with a special filter for standby use.

[0117] Step 2: Prepare weak solvent matte (printing ink-absorbing layer coating) surface glue

[0118] Acrylic emulsion A: 100-400 kg

[0119] Acrylic emulsion B: 30-150 kg

[0120] Matt dispersion solution: 50-200 kg

[0121] Surfactant A: 1-20 kg

[0122] Surfactant B: 1-25 kg

[0123] Defoaming agent: 1-15 kg

[0124] Thickener: 2-20 kg

[0125] Bridging agent: 1-18 kg.

[0126] Weak solvent matte (printing ink-absorbing layer coating) batching process:

[0127] In the mixer barrel, first add acrylic emulsion A, then slowly adjust the motor speed to 800 rpm, then pour in acrylic emulsion B, and then use a streamlined addition method to add the defoaming agent first. After all are added, mix and stir directly for 15 minutes.

[0128] Then, add surfactant A in a streamlined manner, wait for 15 minutes, then add surfactant B, continue stirring for 15 minutes, increase the speed to 1440 rpm, and then add the pre-prepared matte dispersion solution prepared in advance. After all of it is added, directly disperse at high speed for 60 minutes.

[0129] Then reduce the speed of the motor to 800 rpm, add the bridging agent slowly using a streamlined addition method, continue stirring for 10 minutes and then add the thickener. After all the additions are complete, stir for another 30 minutes, then stop the machine and filter with a filter for use on the machine.

[0130] In the entire production process, the single-shot single-knife coating method is prone to many wastes. For example, at the beginning of each coating, the raw material will be tilted due to improper positioning. In the process of slowly changing from tilted to straight, some waste will be generated. Every time the coating starts and the material is added to the blade, there will also be some waste. Every time it is reeled, some waste will be generated because the lead cloth is not neat.

[0131] Improper temperature adjustment will also lead to greater waste. Every time the substrate passes through the oven, there will be a lot of waste caused by black spots, dirt spots and oil spots in the oven. However, the innovative coating method can produce a finished product with just three coats. The substrate only needs to pass through the entire oven once, which will greatly reduce waste. At the same time, waste and loss in other aspects will also be greatly reduced. This is the great advantage of the innovative coating method.

[0132] Using innovative coating methods, we can produce a wide range of products, such as hand-painted oil canvas, photo canvas, outdoor banner cloth, weak solvent high-gloss photo inkjet oil canvas, weak solvent matte photo inkjet oil canvas, high-gloss non-waterproof photo canvas, waterproof matte photo inkjet oil canvas, regardless of the base material is chemical fiber grey cloth, pure cotton grey cloth, polyester-cotton grey cloth, linen grey cloth, etc.

[0133] In summary, the innovative coating method has obvious advantages over the existing single-shot single-knife coating method in terms of production efficiency, production loss and waste. The use of innovative coating methods not only greatly improves production efficiency and greatly reduces production costs, but also improves product quality.

[0134] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A one-time three-knife coating high-efficiency oil painting canvas, characterized by: S1. First, place the surface-treated but uncoated chemical fiber fabric base material roll (A-frame fabric roll) on the unwinding station of the 360-type (effective width 3.6 meters) intelligent coating machine. Start the machine and press the acceleration button. The fabric will move forward along the guide roller at a constant speed. After the fabric comes out of the roll, it will undergo the first precision coating. S2, the first precision coating: a high wear-resistant scraper with a blade of 3.0 is used for scraping. The paint used is a primer specially made for weak solvent oil painting canvas. The main function of this knife is to seal the pores of the grey cloth. When the grey cloth passes through the first scraper, the scraper will scrape off the excess paint on the surface of the grey cloth. After the grey cloth passes through the scraper, a uniform layer of primer wet glue will be scraped on the surface. The grey cloth with wet glue on the surface will directly undergo the second coating after passing through the first scraper, and then enter the oven. S3, the second precision coating: This knife is also scraped with a high-wear-resistant scraper with a blade of 3.

0. The paint used is the same as that used in the first coating, which is also a primer specially made for weak solvent oil canvas. This coating mainly plays a role in weight increase and whitening. The operator of this coating stands above the needle plate track and behind the scraper. On such a manual platform, the paint is added to the front of the scraper. After the substrate is scraped by the second scraper, it will directly enter the high-temperature oven for drying, and then the third precision coating will be carried out; S4, the third precision coating: The third precision coating is completed on the platform area of the second layer. It is also done with a high-wear-resistant scraper with a blade of 3.

0. The substrate has been coated with two primers. When the third coating is done, the weak solvent high-gloss photo inkjet canvas will be completed. The last coat of glue is done with the top coat. The paint used in this coat is weak solvent high-gloss paint. If it is a weak solvent matte photo inkjet canvas, this coat is weak solvent matte paint. Return to the oven again and continue drying. When the substrate comes out of the oven, the surface has been thoroughly dried. S5. After the substrate leaves the oven, it will move about 45 degrees downward and rearward, and directly enter the double-roll flattening combination. After the substrate comes out from between the two rollers, it directly enters the roller combination for adjusting the tension. After coming out from here, it continues to move about 45 degrees to the upper right, and finally passes over a roller. It will be automatically rolled on the A-frame for rolling until the entire coating work is completed. At this step, the entire coating process of the innovative coating method is completed.

2. The disposable three-knife coating high-efficiency oil painting canvas according to claim 1, characterized in that: The three-coating and three-baking method is as follows: after the first coating, the substrate immediately enters a 15-meter oven for drying, and immediately enters a second coating after coming out of the oven, and immediately enters a 9-meter oven after the second coating, and immediately enters a third coating after coming out of the oven, and immediately enters a 9-meter oven for drying, and is rolled up after coming out of the oven for drying.

3. The disposable three-knife coating high-efficiency oil painting canvas according to claim 1, characterized in that: The weak solvent high gloss (weak solvent matte) primer formula: Water: 100-350 kg Natural stone powder A: 30-110 kg Dispersant: 1-17 kg Defoaming agent: 1-25 kg PVA glue: 50-300 kg Natural stone powder E: 150-400 kg Natural stone powder D: 50-350 kg Natural stone powder C: 100-200 kg Natural stone powder B: 100-350 kg VAE Emulsion A: 300-600 kg VAE Emulsion B: 200-500 kg Whitening agent: 1-15 kg Plasticizer: 5-80 kg Surfactant: 2-50 kg.

4. The disposable three-knife coating high-efficiency oil painting canvas according to claim 1, characterized in that: The weak solvent high gloss (printing ink absorbing layer coating) surface adhesive coating formula: Acrylic emulsion A: 600-1000 kg Acrylic emulsion B: 250-600 kg Surfactant A: 1-10 kg Surfactant B: 3-30 kg Defoaming agent: 1-10 kg Thickener: 1-20 kg Bridging agent: 3-15 kg Whitening agent: 1-10 kg.

5. The disposable three-knife coating high-efficiency oil painting canvas according to claim 1, characterized in that: The weak solvent matte (printing ink-absorbing layer coating) surface adhesive coating formula: Step 1: Pre-prepare matte dispersion solution Water: 100-450 kg Dispersant: 1-9 kg White carbon black: 20-80 kg Silicon dioxide: 20-60 kg Nano adsorbent: 20-80 kg.

6. The disposable three-knife coating high-efficiency oil painting canvas according to claim 1, characterized in that: The weak solvent matte (printing ink-absorbing layer coating) surface adhesive coating formula: Step 2: Prepare weak solvent matte (printing ink-absorbing layer coating) surface glue Acrylic emulsion A: 100-400 kg Acrylic emulsion B: 30-150 kg Matt dispersion solution: 50-200 kg Surfactant A: 1-20 kg Surfactant B: 1-25 kg Defoaming agent: 1-15 kg Thickener: 2-20 kg Bridging agent: 1-18 kg.

7. The disposable three-knife coating high-efficiency oil painting canvas according to claim 3, characterized in that: The weak solvent high gloss (weak solvent matte) primer coating ingredient process is as follows: first add water to the barrel of the mixer, start the motor, slowly increase the speed to 1440 rpm, and then add dispersant, defoaming agent, and surfactant in turn. After adding each additive, wait 10 minutes before adding another additive.

8. The disposable three-knife coating high-efficiency oil painting canvas according to claim 4, characterized in that: The weak solvent high gloss (printing ink-absorbing layer coating) topcoat coating preparation process is as follows: first slowly add acrylic emulsion A into the barrel of a high-speed stirring disperser, then turn on the mixer, slowly adjust the motor speed to 600 rpm, and then slowly add acrylic emulsion B. After all are added, stir directly for 30 minutes.

9. The disposable three-knife coating high-efficiency oil painting canvas according to claim 5, characterized in that: The process flow of the prefabricated matte dispersion solution is as follows: first put water into the barrel of the high-speed disperser, then after turning on the mixer, slowly increase the speed of the motor to 1440 rpm, and then slowly add the dispersant in a streamlined manner. After all the dispersant is added, directly disperse at high speed for 15 minutes, and then add white carbon black, silica, nano-adsorbent, etc. in the order of the formula. After all the raw materials are added, directly disperse at high speed at a speed of 1440 rpm for 60 minutes, then stop the machine and filter with a special filter for standby use.

10. The disposable three-knife coating high-efficiency oil painting canvas according to claim 6, characterized in that: In the mixer barrel, first add acrylic emulsion A, then slowly adjust the motor speed to 800 rpm, then pour in acrylic emulsion B, and then use a streamlined adding method to add the defoaming agent first. After all are added, mix and stir directly for 15 minutes.