Production method and production system for nano-plate with conveying anti-sticking function

Abstract

The invention relates to the technical field of nano-plate production, in particular to a production method and a production system for a nano-plate with an anti-sticking conveying function, and the production method comprises the following steps: S1, accurately weighing polymer resin, functional filler and auxiliaries according to a mass ratio of 100: 5: 1; s2, uniformly dispersing and mixing the weighted raw materials; s3, the mixed materials are subjected to high-pressure forming, and a preliminary plate blank is formed; s4, the plate blank is subjected to laser cutting, and a base material is manufactured; s5, firstly spraying the PFA anti-sticking bottom layer on the base material, then spraying the fluorosilane nano coating, and then drying; s6, the size and the weight of the base material are detected; s7, the silica gel frame is installed outside the base material with the qualified size and weight; according to the invention, the fluorosilane nano coating and the self-repairing microcapsule composite coating are subjected to in-situ bonding through plasma activation, so that the adhesive strength of the coatings is greatly improved to be greater than or equal to 5 MPa, the static friction coefficient is reduced to be less than or equal to 0.15, and the anti-sticking cycle index is improved to be greater than or equal to 1500 times.

Description

Technical Field

[0001] This invention relates to the field of nanoplate production technology, specifically to a method and system for producing nanoplates with anti-stick conveying capabilities. Background Technology

[0002] With the development of nanomaterials and composite coating technology, applying anti-sticking materials such as fluorosilanes, PFA, and PTFE to the surface of conveyor belts has become a common practice to improve slab conveying efficiency and reduce adhesion risk. On existing nanoplate production lines, most use conventional PTFE spraying or directly use polyester mesh belts as the conveying medium to form an anti-stick layer through simple spraying or physical bonding. Combined with traditional high-pressure molding, laser cutting, surface spraying and drying, online inspection and other processes, basic production needs can be met. Existing nanoplate production lines mostly use PTFE sprayed with a thickness of only 5–10 μm or polyester mesh belts without an anti-stick layer. The coating has low adhesion to the substrate and is prone to peeling or cracking after high temperature, high pressure and repeated friction cycles, causing the static friction coefficient to rise rapidly to ≥0.30. It is necessary to stop the machine for cleaning or replace the conveyor belt every 100 hours or so. Therefore, in order to solve the above problems, a nanoplate production method and its production system with anti-stick conveyor is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a method and system for producing nanoplates with anti-stick conveyor, in order to solve the problem that existing nanoplate production lines mostly use PTFE sprayed or polyester mesh belts without anti-stick layers with a thickness of only 5-10μm. The coating has low adhesion to the substrate and is prone to peeling or cracking after high temperature, high pressure and multiple friction cycles, resulting in a rapid increase in the static friction coefficient to ≥0.30, which requires stopping the machine for cleaning or replacing the conveyor belt every 100 hours or so.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A method and system for producing nanoplates with anti-stick properties include the following steps: S1: The polymer resin, functional filler and additives are accurately weighed according to a mass ratio of 100:5:1; S2: Disperse and mix the weighted raw materials evenly; S3: The mixed materials are formed into a preliminary slab through high-pressure molding; S4: The slab is laser-cut to form the substrate; S5: The substrate is first coated with a PFA anti-stick undercoat, then coated with a fluorosilane nano-coating, and then dried. S6: Inspect the dimensions and weight of the substrate; S7: Install the silicone frame on the outside of the substrate that has passed the size and weight inspection; S8: Firmly bond the PET film to the substrate to complete the PET film encapsulation process; S9: Apply double-sided adhesive film, peel off the backing paper, and automatically transfer to the next station to complete the adhesive application process; S10: Uses an industrial camera to take 360° panoramic photos, and combines a defect recognition algorithm to automatically remove bubbles, scratches and other defects, thus completing the appearance inspection process. S11: The laser marking machine marks the batch number and production date, automatically sorts and boxes the products, and completes the final packaging with bubble wrap and sealing tape.

[0005] As a further optimization of the present invention, in S2, the raw materials after counterweighting are fed into a twin-screw mixer at a speed of 300 rpm and a screw temperature of 80°C for 5 minutes to achieve uniform dispersion of the materials.

[0006] As a further optimization of the present invention, in S3, high-pressure forming is performed by applying 1500 bar of pressure and holding it for 30 seconds through a thousand-ton hydraulic press mold, with the mold temperature maintained at 120°C, to form a preliminary slab.

[0007] As a further optimization of the present invention, in S4, the laser cutting utilizes a 200W CO2 laser, with a cutting speed of 20mm / s, an accuracy of ±0.1mm, and an edge roughness Ra≤2.5μm.

[0008] As a further optimization of the present invention, in S5, the fluorosilane nano-coating adopts electrostatic atomization spraying technology, and the spraying pressure is controlled at 0.2–0.4 MPa and the spraying distance is 150–200 mm, so as to uniformly coat the material with nano-additives.

[0009] As a further optimization of the present invention, in S5, a three-stage tunnel infrared / hot air drying process is used, with a three-stage tunnel air temperature of 140°C, an air speed of 2m / s, and a single section length of 3m. The three-stage tunnel infrared / hot air drying process uses a nano-anti-stick conveyor belt, the surface of which is subjected to plasma activation treatment and a fluorosilyl composite nano-coating is bonded in situ on it.

[0010] As a further optimization of the present invention, in S6, the detection deviation limits for substrate size and weight are ±0.2mm and ±1%, respectively. In the S7, the silicone frame is preheated to 60°C and then picked up and installed by a robotic arm.

[0011] As a further optimization of the present invention, in S8, the PET film and the substrate are pressed together by a hot press at 150°C and 0.8MPa pressure for 20s.

[0012] As a further optimization of the present invention, it includes the following components produced sequentially: a raw material counterweight device, a raw material mixing device, a high-pressure forming device, a laser cutting device, a surface spraying and drying device, a size / weight inspection device, a silicone frame mounting device, a PET film encapsulation device, an adhesive backing device, an appearance inspection device, and a qualified product inkjet packaging device.

[0013] As a further optimization of the present invention, a conveying anti-sticking unit is provided between the high-pressure forming device and the laser cutting device. This unit is composed of a polyester mesh belt matrix, a PFA polymer anti-sticking coating, and a fluorosilane nano-coating that is chemically bonded in situ after plasma activation, which are stacked sequentially to form a durable and self-healing nano-anti-sticking surface during the slab conveying process.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In this invention, by using plasma-activated in-situ bonded fluorosilane nano-coating and self-healing microcapsule composite coating, the coating adhesion strength is significantly improved to ≥5MPa, the static friction coefficient is reduced to ≤0.15, and the number of anti-sticking cycles is increased to ≥1500. Combined with an online optical reflectivity and friction coefficient monitoring device, automatic early warning or switching to a backup line is achieved when the coating wear exceeds the limit, extending the downtime maintenance cycle to ≥1200h, thereby significantly improving the anti-sticking performance, operational reliability, and automation level of the production line. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the nanoplate production system with anti-stick conveying capability of the present invention. Detailed Implementation

[0016] Please see Figure 1 The present invention provides a technical solution: Example 1 A method for producing a nanoplate with a non-stick conveying system includes the following steps: S1: The polymer resin, functional filler and additives are accurately weighed according to a mass ratio of 100:5:1; S2: Disperse and mix the counterweighted raw materials evenly. The counterweighted raw materials are fed into a high-speed twin-screw mixer at a speed of 300 rpm and a screw temperature of 80 ℃ for 5 minutes to achieve uniform material dispersion. S3: The mixed materials are formed under high pressure. The high pressure forming process is carried out through a thousand-ton hydraulic press mold, with 1500 bar applied and held for 30 seconds. The mold temperature is maintained at 120°C to form a preliminary slab. S4: The slab is laser-cut to form the substrate. The laser cutting uses a 200W CO2 laser with a cutting speed of 20mm / s, an accuracy of ±0.1mm, and an edge roughness Ra≤2.5μm. S5: The substrate is first sprayed with PFA anti-stick undercoat, then sprayed with fluorosilane nano coating, and then dried. It is dried by three-stage tunnel infrared / hot air drying. The three-stage tunnel air temperature is 140℃, the air speed is 2m / s, and the single section length is 3m. The three-stage tunnel infrared / hot air drying adopts a nano anti-stick conveyor belt. The surface of the conveyor belt is treated with plasma activation and a fluorosilane composite nano coating is bonded in situ on it. S6: A 10μm resolution online optical scanner and electronic balance are used in parallel to inspect substrates, with deviation limits of ±0.2mm and ±1%; S7: The robotic arm grasps the pre-heated silicone frame to 60°C and assembles it onto the outside of the substrate with an accuracy of ±0.05mm along the edge of the board. S8: Press the PET film in a hot press at 150℃ and 0.8MPa for 20 seconds to firmly bond the film to the substrate and complete the PET film encapsulation process; S9: Using a roller press at a pressure of 1MPa and a rolling speed of 0.2m / s, double-sided adhesive film is applied. After peeling off the backing paper, it automatically transfers to the next station to complete the adhesive backing process. S10: Uses a 5-megapixel industrial camera to take 360° panoramic photos, and combines a defect recognition algorithm to automatically remove bubbles, scratches and other defects, thus completing the appearance inspection process; S11: The laser marking machine marks the batch number and production date, automatically sorts and boxes the products, and completes the final packaging with bubble wrap and sealing tape.

[0017] A nanoplate production system with conveying and anti-sticking features includes a raw material counterweight device, a raw material mixing device, a high-pressure forming device, a laser cutting device, a surface spraying and drying device, a size / weight inspection device, a silicone frame mounting device, a PET film encapsulation device, an adhesive backing device, an appearance inspection device, and a qualified product inkjet packaging device, which are produced sequentially. A conveying anti-sticking unit is set between the high-pressure forming device and the laser cutting device. This unit is composed of a polyester mesh belt matrix, a PFA polymer anti-sticking coating, and a fluorosilane nano-coating that is chemically bonded in situ after plasma activation. It is used to form a durable and self-healing nano-anti-sticking surface during the slab conveying process, thereby effectively reducing the frequency of slab adhesion, jamming, and cleaning and maintenance.

[0018] Example 2 Plasma activation + fluorosilane nanocoating Pretreatment and coating: After the conveyor belt substrate is activated by low-temperature plasma (power 200W, treatment time 60s), fluorosilane nanoparticles are chemically bonded in situ. The coating thickness is 50–100 nm, and it is subsequently dried and cured by a three-stage tunnel infrared / hot air (140℃, 2m / s, 3m / segment). Performance indicators: Initial static friction coefficient ≤ 0.15; Cyclic adhesion resistance ≥ 1,000 cycles; The online cleaning cycle has been extended to 800 hours, and the maintenance frequency has been reduced by 8 times; Applicable working conditions: Standardized production lines, scenarios with medium to high requirements for non-stick properties but sensitive to cost.

[0019] Example 3 Self-healing microcapsule fluorosilane nanocoating Pretreatment and coating: A fluorosilane composite coating containing nano-self-healing microcapsules is sprayed onto the plasma-activated conveyor belt. The microcapsules have a diameter of 1–5 μm and are filled with low-viscosity silicone oil. Spraying parameters: electrostatic atomization 0.3MPa, spray distance 180mm, spray amount 0.8g / m², drying as in Example 2; Self-healing mechanism: When the coating develops microcracks due to friction or scratching, the microcapsules rupture and release silicone oil, which automatically fills the cracks and restores the non-stick surface. Performance indicators: Initial static friction coefficient ≤ 0.12; Cyclic adhesion resistance ≥ 1,500 cycles; No additional cleaning is required online, and it can run continuously for up to 1,200 hours. Applicable operating conditions: High-end continuous production lines, long-cycle operation scenarios that are extremely sensitive to downtime costs.

[0020] Example 4 PFA bottom layer + PTFE top layer dual-layer structure Coating structure: First, spray a PFA base layer (10μm thick, dry at 120℃ for 10min) onto the polyester mesh belt, then spray a PTFE top layer (8μm thick). The two layers are dried separately by tunnel-type infrared / hot air drying (PFA: 120℃, 1.5m / s; PTFE: 140℃, 2m / s, 3m / s each). Performance indicators: Initial static friction coefficient ≤ 0.10; Cyclic adhesion resistance ≥ 1,200 cycles; It has an online cleaning cycle of 1,000 hours and exhibits excellent chemical resistance and high-temperature resistance. Applicable operating conditions: Production lines that require anti-stick properties, chemical corrosion resistance, and high-temperature applications (such as high-temperature downstream processes).

[0021] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A production method for a nanoplate production system with a conveying and anti-sticking feature, characterized in that, Includes the following steps: S1: The polymer resin, functional filler and additives are accurately weighed according to a mass ratio of 100:5:1; S2: Disperse and mix the weighted raw materials evenly; S3: The mixed materials are formed into a preliminary slab through high-pressure molding; S4: The slab is laser-cut to form the substrate; S5: The substrate is first coated with a PFA anti-stick undercoat, then coated with a fluorosilane nano-coating, and then dried. S6: Inspect the dimensions and weight of the substrate; S7: Install the silicone frame on the outside of the substrate that has passed the size and weight inspection; S8: Firmly bond the PET film to the substrate to complete the PET film encapsulation process; S9: Apply double-sided adhesive film, peel off the backing paper, and automatically transfer to the next station to complete the adhesive application process; S10: Uses an industrial camera to take 360° panoramic photos, and combines a defect recognition algorithm to automatically remove bubbles, scratches and other defects, thus completing the appearance inspection process. S11: The laser marking machine marks the batch number and production date, automatically sorts and boxes the products, and completes the final packaging with bubble wrap and sealing tape.

2. The production method of a nanoplate production system with anti-stick conveying capability according to claim 1, characterized in that: In S2, after counterweighting, the raw materials are fed into a twin-screw mixer at a speed of 300 rpm and a screw temperature of 80°C for 5 minutes to achieve uniform material dispersion.

3. The production method of a nanoplate production system with anti-stick conveying capability according to claim 1, characterized in that: In S3, high-pressure forming is performed using a thousand-ton hydraulic press mold, applying 1500 bar and holding pressure for 30 seconds, while maintaining the mold temperature at 120°C to form a preliminary slab.

4. The production method of a nanoplate production system with anti-stick conveying capability according to claim 1, characterized in that: In S4, laser cutting utilizes a 200W CO2 laser to cut at a speed of 20mm / s, with an accuracy of ±0.1mm and an edge roughness Ra≤2.5μm.

5. A production method for a nanoplate production system with anti-stick conveying capability according to claim 1, characterized in that: In S5, the fluorosilane nano-coating is applied using electrostatic atomization spraying technology, with the spraying pressure controlled at 0.2–0.4 MPa and the spraying distance at 150–200 mm, to ensure that the nano-additives uniformly coat the material.

6. The production method of a nanoplate production system with anti-stick conveying capability according to claim 1, characterized in that: In S5, a three-stage tunnel infrared / hot air drying process is used. The three-stage tunnel air temperature is 140℃, the air speed is 2m / s, and the single section length is 3m. The three-stage tunnel infrared / hot air drying process uses a nano-anti-stick conveyor belt. The surface of the conveyor belt is treated with plasma activation and a fluorosilyl composite nano-coating is bonded in situ on it.

7. A production method for a nanoplate production system with anti-stick conveying capability according to claim 1, characterized in that: In S6, the tolerance limits for substrate size and weight are ±0.2mm and ±1%, respectively. In the S7, the silicone frame is preheated to 60°C and then picked up and installed by a robotic arm.

8. A production method for a nanoplate production system with anti-stick conveying capability according to claim 1, characterized in that: In S8, the PET film and the substrate are pressed together by a hot press at 150°C and 0.8MPa pressure for 20 seconds.

9. A nanoplate production system with anti-stick conveying capability according to any one of claims 1-8, characterized in that: It includes a raw material counterweight device, a raw material mixing device, a high-pressure forming device, a laser cutting device, a surface spraying and drying device, a size / weight inspection device, a silicone frame mounting device, a PET film sealing device, an adhesive backing device, an appearance inspection device, and a qualified product inkjet packaging device, which are produced sequentially.

10. A nanoplate production system with anti-stick conveying capability according to claim 9, characterized in that: A conveying anti-sticking unit is provided between the high-pressure forming device and the laser cutting device. This unit is composed of a polyester mesh belt substrate, a PFA polymer anti-sticking coating, and a fluorosilane nano-coating that is chemically bonded in situ after plasma activation, which is used to form a durable and self-healing nano-anti-sticking surface during the slab conveying process.

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