Integrated forming preparation process of heating plate

Abstract

The invention relates to the technical field of heating plates, and discloses a heating plate integral forming preparation process which comprises the following steps: S1, stacking: firstly preparing raw materials, sequentially putting the raw materials into a stacking mold for stacking, and observing the stacked raw materials with naked eyes; s2, hot pressing; s3, cutting is carried out; s4, power line welding: uniformly smearing a welding aid on a gap position connected with the power line, and then carrying out rapid welding through a laser welding machine; s5, insulating and fixing positive and negative electrodes of the power line; and S6, inspection. The surface treatment layer, the fireproof layer, the insulating layer and the heating layer are made of different materials, the stacking sequence effect is remarkable, and the surface treatment layer is attractive, resistant to corrosion and abrasion and capable of enhancing durability; the fireproof layer is used for dual protection, safety is ensured at high temperature, and the insulating layer prevents current leakage and electrical interference; the material has the advantages of stable heating and high thermal efficiency, has unique performance advantages, can give full play to the advantages of various materials, and improves the comprehensive performance of the product.

Description

Technical Field

[0001] The invention relates to the technical field of heating plates, and in particular to an integrated molding preparation process for heating plates. Background Art

[0002] A heating plate is a device component that can convert electrical energy into thermal energy. It is usually made of specific materials and according to a certain process. The heating plate has many advantages. On the one hand, it can generate heat stably and provide a reliable heat source for various scenarios that require heating. The heat generated can be effectively concentrated and utilized, which improves thermal efficiency and reduces energy consumption. The one-piece molding preparation process usually has a high degree of automation, can achieve continuous production, and greatly shortens the production cycle. Compared with the traditional step-by-step assembly process, the one-piece molding process can reduce the operation time and labor costs of the intermediate links and improve production efficiency.

[0003] The existing technology has deficiencies in performance, material combination, and overall design for practical applications: the surface treatment layer has poor durability, weak fire resistance, poor insulation, unstable heat generation, and low thermal efficiency. There are many unstable physical properties during use, including deformation, shrinkage, expansion, softening, and other problems of the board, and the decorative effect cannot be met. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an integrated molding preparation process for heating plates, which solves the problems of poor durability, weak fire resistance, poor insulation, unstable heating and low thermal efficiency of the surface treatment layer, and many unstable physical properties during use, including deformation, shrinkage, expansion, softening and other problems of the plate.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The integrated heating plate forming process comprises the following steps: S1. Stacking: Prepare the raw materials first, put them into the stacking mold in order for stacking, observe the stacked raw materials with the naked eye to check whether the gap is uniform. You can observe from different angles, such as the side, front and top, to ensure that the gap is consistent in all directions. Adjust the uneven gap by gently moving the raw materials or adjusting the position of the spacer until the gap reaches a uniform state; S2. Hot pressing: put the prepared raw materials into the preparatory hot pressing area, make sure that their surface is clean and flat, and observe whether the gap in the middle is uniform, so that they are in contact with the heating element, and gradually increase the temperature of the hot press to the required hot pressing temperature. After the material reaches the hot pressing temperature, gradually apply pressure to the material. After the hot pressing is completed, gradually reduce the temperature of the hot press to cool the material to room temperature. When the material is cooled, release the pressure and take it out of the hot press; S3. Cutting: Align the cutting tool with the mark on the material or the predetermined cutting position, start the cutting tool slowly and steadily, control the moving direction of the cutting tool, ensure that the cutting line is straight and accurate, and for thicker or harder materials, gradually increase the cutting depth to avoid material breakage or damage to the cutting tool. Check the cutting quality. After cutting, immediately check the quality of the cutting edge to see if it is flat and smooth, and whether there are burrs, cracks or deformations; S4. Power line welding: First use sandpaper, blade or detergent to clean the welding part to remove surface oxides, oil stains and impurities to ensure welding quality. Then apply welding additive evenly to the gap where the power line is connected, and then use the laser welding machine for rapid welding. S5. Insulation and fixation of the positive and negative poles of the power cord: Check whether the power cord is unobstructed after welding, check whether the positive and negative poles of the power cord are damaged or oxidized, wipe the surface of the positive and negative poles of the power cord with a clean cloth or paper towel to remove dust, oil and impurities, ensure that the surface is clean and tidy, and then attach the insulating material to the outside for insulation treatment; S6. Inspection: Check the appearance of the heating plate comprehensively. The surface should be clean, without scratches, stains, or obvious color difference. The color and gloss should be uniform. Check whether the edges of the heating plate are cut neatly and smoothly, without burrs or broken edges. Use an insulation resistance tester to measure the insulation resistance of the heating plate at a specified voltage. The insulation resistance should not be lower than a certain value to ensure good insulation performance and prevent leakage.

[0006] Preferably, in S1, the raw materials include a surface treatment layer, a fire-resistant layer, an insulating layer and a heating layer, and the stacking order is the first surface treatment layer, the second fire-resistant layer, the third insulating layer, the fourth heating layer, the fifth insulating layer, the sixth fire-resistant layer, and the seventh surface treatment layer.

[0007] Preferably, in S1, the material of the surface treatment layer includes decorative paper and melamine glue, the mass percentage of the decorative paper is 20-40%, the mass percentage of the melamine glue is 80-60%, the material of the fire-resistant layer includes glass fiber cloth, the resin and the inorganic polymer material include ceramic fiber and high-temperature ceramic, the mass percentage of the inorganic polymer material is 20-30%, and the mass percentage of the resin is 70-80%, the material of the insulating layer includes glass fiber and epoxy resin, amine curing agent or active diluent, the ratio of active amine curing agent or active diluent to epoxy resin is 10%-30%, and the material of the heating layer uses high-resistance material, wherein the high-resistance material includes nickel-cadmium aluminum, iron-chromium aluminum, carbon fiber, and graphene.

[0008] Preferably, in S2, the temperature of the hot press is 120°C-180°C, the hot pressing time is 30-60 minutes, and the pressure is 5MPa-50MPa.

[0009] Preferably, in S3, the cutting tool comprises a hydraulic cutting machine, the cutting pressure is 50-100 tons, the cutting height is 1.5-2.5 meters, and the cutting speed is 5-20 times / minute.

[0010] Preferably, in S4, the welding aid comprises the following raw materials in parts by mass: 20-30 parts of silicone modified acrylic resin, 18-27 parts of ethylene glycol butyl ether acetate, 15-25 parts of rosin organic acid activator and 17%-20% of rosin modified corrosion inhibitor, 40%-50% of rosin modified temperature resistant corrosion inhibition paste, 5-8 parts of triethanolamine, 10-15 parts of copper carbonate, 3-5 parts of hydroquinone, 20-25 parts of salicylic acid, 7-9 parts of diacetone alcohol, 80-100 parts of deionized water, and 4-8 parts of BYK410 thixotropic agent.

[0011] Preferably, in S5, the insulating material includes a rubber and plastic composite material or a fiber and plastic composite material, and the epoxy phenolic resin and glass fiber composite material has an insulation resistance of 500-600 megohms, a withstand voltage of 10-15 kilovolts, a tensile strength of 10-15 MPa, an elongation at break of 150-200%, a heat-resistant temperature of 80°C-150°C, a cold-resistant temperature of -40°C-60°C, an epoxy phenolic resin content of 20%-50%, and a glass fiber content of 50%-80%.

[0012] Preferably, in S7, the specified voltage of the resistance meter is 500V-600V, and the insulation resistance is not less than 50-100MΩ.

[0013] The present invention provides a one-piece manufacturing process for a heating plate, which has the following beneficial effects: 1. The present invention adopts different materials for the surface treatment layer, fire-resistant layer, insulating layer and heating layer respectively, and the stacking order has a significant effect. The surface treatment layer provides aesthetics, corrosion resistance, wear resistance and enhanced durability; the fire-resistant layer has double protection to ensure safety at high temperatures, and the insulating layer prevents current leakage and electrical interference; the heating layer is surrounded, generates heat stably and has high thermal efficiency. These materials each have unique performance advantages, which can give full play to the advantages of various materials and improve the comprehensive performance of the product.

[0014] 2. The present invention uses a welding auxiliary silicone-modified acrylic resin to enhance connection stability during welding; ethylene glycol butyl ether acetate is used as a solvent to adjust the fluidity and drying speed of the system; a rosin organic acid activator improves coating durability; a rosin-modified corrosion inhibitor and a paste-forming agent synergistically improve anticorrosion performance; triethanolamine adjusts pH value and stability; copper carbonate provides color and possible anticorrosion and antibacterial effects; hydroquinone is antioxidant; salicylic acid is bactericidal and anticorrosive and adjusts performance; diacetone alcohol is a solubilizing agent to adjust fluidity; deionized water dissolves components to provide environmental protection conditions; BYK410 thixotropic agent prevents sagging and facilitates construction, so that the welding power cord can have a more stable effect during use.

[0015] 3. The rubber and plastic composite material or the fiber and plastic composite material of the present invention has very high insulation resistance, which can effectively prevent current leakage, ensure the safe operation of electrical equipment and circuits, prevent the occurrence of electrical faults such as leakage and short circuit, and provide reliable safety protection for users. The higher voltage resistance strength means that the material can withstand higher voltage without being broken down, providing reliable insulation protection for electrical equipment, and can play a stable role in different high-voltage electrical environments and adapt to a variety of complex working scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1: Please see attached Figure 1 The embodiment of the present invention provides a heating plate integral molding preparation process, comprising the following steps: S1. Stacking: Prepare the raw materials first, put them into the stacking mold in order for stacking, observe the stacked raw materials with the naked eye to check whether the gap is uniform. You can observe from different angles, such as the side, front and top, to ensure that the gap is consistent in all directions. Adjust the uneven gap by gently moving the raw materials or adjusting the position of the spacer until the gap reaches a uniform state; S2. Hot pressing: put the prepared raw materials into the preparatory hot pressing area, make sure that their surface is clean and flat, and observe whether the gap in the middle is uniform, so that they are in contact with the heating element, and gradually increase the temperature of the hot press to the required hot pressing temperature. After the material reaches the hot pressing temperature, gradually apply pressure to the material. After the hot pressing is completed, gradually reduce the temperature of the hot press to cool the material to room temperature. When the material is cooled, release the pressure and take it out of the hot press; S3. Cutting: Align the cutting tool with the mark on the material or the predetermined cutting position, start the cutting tool slowly and steadily, control the moving direction of the cutting tool, ensure that the cutting line is straight and accurate, and for thicker or harder materials, gradually increase the cutting depth to avoid material breakage or damage to the cutting tool. Check the cutting quality. After cutting, immediately check the quality of the cutting edge to see if it is flat and smooth, and whether there are burrs, cracks or deformations; S4. Power line welding: First use sandpaper, blade or detergent to clean the welding part to remove surface oxides, oil stains and impurities to ensure welding quality. Then apply welding additive evenly to the gap where the power line is connected, and then use the laser welding machine for rapid welding. S5. Insulation and fixation of the positive and negative poles of the power cord: Check whether the power cord is unobstructed after welding, check whether the positive and negative poles of the power cord are damaged or oxidized, wipe the surface of the positive and negative poles of the power cord with a clean cloth or paper towel to remove dust, oil and impurities, ensure that the surface is clean and tidy, and then attach the insulating material to the outside for insulation treatment; S6. Inspection: Check the appearance of the heating plate comprehensively. The surface should be clean, without scratches, stains, or obvious color difference. The color and gloss should be uniform. Check whether the edges of the heating plate are cut neatly and smoothly, without burrs or broken edges. Use an insulation resistance tester to measure the insulation resistance of the heating plate at a specified voltage. The insulation resistance should not be lower than a certain value to ensure good insulation performance and prevent leakage.

[0019] In S1, the raw materials include a surface treatment layer, a fire-resistant layer, an insulating layer and a heating layer, and the stacking order is the first surface treatment layer, the second fire-resistant layer, the third insulating layer, the fourth heating layer, the fifth insulating layer, the sixth fire-resistant layer, and the seventh surface treatment layer.

[0020] Specifically, the seventh surface treatment layer and the first surface treatment layer serve as the first and outermost layers to protect the internal layers. At the same time, they can give the product a good appearance and certain corrosion resistance and wear resistance, thereby improving the overall durability of the product. The second fire-resistant layer can provide effective fire protection in a high temperature environment, prevent the internal structure from being damaged by external fire sources or high temperatures, and ensure safe use. The third and fifth insulation layers can effectively prevent current leakage and avoid the risk of electric shock. At the same time, they can also prevent electrical interference between different layers to ensure the stable function of each layer. The heating layer is in the middle position and is surrounded by the insulating layer and the fire-resistant layer. On the one hand, it can generate heat stably, and on the other hand, the heat generated can be effectively concentrated and utilized to improve thermal efficiency. The sixth fire-resistant layer further strengthens the fire resistance, and together with the second fire-resistant layer, provides double fire-resistant protection for the product.

[0021] In S1, the materials of the surface treatment layer include decorative paper and melamine glue, the mass percentage of the decorative paper is 20-40%, the mass percentage of the melamine glue is 80-60%, the materials of the fire-resistant layer include glass fiber cloth, resin and inorganic polymer materials include ceramic fiber and high-temperature ceramics, the mass percentage of the inorganic polymer material is 20-30%, and the mass percentage of the resin is 70-80%, the materials of the insulating layer include glass fiber and epoxy resin, amine curing agent or active diluent, the ratio of active amine curing agent or active diluent to epoxy resin is 10%-30%, and the material of the heating layer uses high-resistance material, among which the high-resistance material includes nickel-cadmium aluminum, iron-chromium aluminum, carbon fiber, and graphene.

[0022] Specifically, the surface treatment layer contains decorative paper and melamine glue. The decorative paper plays a decorative role. The melamine glue is used for bonding and enhancing wear resistance. The fire-resistant layer has glass fiber cloth, resin and inorganic polymer materials. The glass fiber cloth and resin help maintain the stability of the structure. The inorganic polymer materials can insulate and resist fire. The insulating layer is composed of glass fiber, epoxy resin and amine curing agent or active diluent. The glass fiber and epoxy resin play an insulating role. The curing agent promotes curing. The diluent facilitates construction. The heating layer uses high-resistance materials such as nickel-cadmium-aluminum, which can generate heat when powered on and can meet a variety of heating needs. In S2, the temperature of the hot press is 120°C, the hot press time is 30 minutes, and the pressure is 5 MPa.

[0023] Specifically, the temperature of 120℃ can promote better fusion and solidification between the layers of materials. For the surface treatment layer, the decorative paper and melamine glue and glue can be closely combined at this temperature to form a strong adhesion effect, ensuring the flatness and aesthetics of the surface. For the fire-resistant layer, the resin can soften and flow better, fully combine with glass fiber paper and inorganic polymer materials, and enhance the fire resistance. The epoxy resin in the insulating layer can also react with glass fiber, amine curing agent or active diluent at this temperature to form a solid insulation structure. The carbon fiber of the heating layer can also be stably exerted at a certain temperature to ensure the uniformity and reliability of heating. The 30-minute hot pressing time can allow the temperature in the hot press to be fully transferred to each layer of material, so that the chemical reaction and physical changes between the materials can be more fully carried out, avoiding the problem of stratification and weak bonding caused by insufficient time. The pressure of 5MPa can make the layers of materials fit together tightly, reduce the gaps and bubbles between the materials, and under the action of pressure, the molecular structure of the material is more compact, which improves the density and strength of the product. At the same time, the pressure can also make the surface treatment layer smoother and smoother, improving the appearance quality of the product.

[0024] S3's cutting tools include a hydraulic cutting machine with a cutting pressure of 50 tons, a cutting height of 1.5 meters, and a cutting speed of 5 times / minute.

[0025] Specifically, the 50-ton cutting pressure can ensure strong and precise cutting of multi-layer composite structures. For this material combination including surface treatment layer, fire-resistant layer, insulation layer and heating layer, the greater pressure can easily cut through each layer of material, avoiding problems such as uneven cutting and rough edges; The 1.5-meter cutting height provides a larger space for cutting operations, which means that larger-sized materials can be cut to meet the production needs of products of different specifications. The cutting speed of 5 times / minute provides a more reasonable production efficiency while ensuring the cutting quality. This speed will neither reduce the cutting accuracy due to being too fast nor affect the production progress due to being too slow. At the same time, the appropriate cutting speed can also help reduce equipment wear and energy consumption, thereby reducing production costs.

[0026] In S4, the welding aid includes the following raw materials in parts by mass: 20 parts of silicone modified acrylic resin, 18 parts of ethylene glycol butyl ether acetate, 15 parts of rosin organic acid activator, 17% of rosin modified corrosion inhibitor, 40% of rosin modified temperature resistant corrosion inhibition paste, 5 parts of triethanolamine, 10 parts of copper carbonate, 3 parts of hydroquinone, 20 parts of salicylic acid, 7 parts of diacetone alcohol, 80 parts of deionized water, and 4 parts of BYK410 thixotropic agent.

[0027] Specifically, the silicone-modified acrylic resin provides good film-forming properties, giving the coating a certain strength and toughness, enhancing weather resistance, resisting the effects of ultraviolet rays, temperature changes and humidity environmental factors, improving adhesion, and ensuring that the coating is closely bonded to the raw materials; Ethylene glycol butyl ether acetate is used as a solvent to dissolve and dilute other ingredients, so that the entire system has appropriate fluidity, adjust the drying speed of the coating, and ensure operability during the construction process; Rosin organic acid activator activates the rosin component, improves its reactivity, enhances the adhesion between the coating and the raw materials, and improves the durability of the coating; Rosin modified corrosion inhibitor inhibits the corrosion of metal raw materials and prevents the occurrence of corrosion. It works synergistically with rosin modified temperature-resistant corrosion inhibitor paste to improve the anti-corrosion performance of the coating. Rosin modified heat-resistant corrosion-inhibiting paste provides good heat resistance, allowing the coating to remain stable in high temperature environments, enhancing the corrosion inhibition effect, further protecting the metal raw materials, and forming a paste texture that is easy to construct and apply; Triethanolamine adjusts the pH value of the coating to keep it within the appropriate range and interacts with other ingredients to improve the stability of the coating; Copper carbonate provides a certain color or special appearance effect to the coating, and in some cases, has a certain anti-corrosion or antibacterial effect; Hydroquinone acts as an antioxidant to prevent the components in the coating from being oxidized, thus extending the storage life of the coating and maintaining its stable performance; Salicylic acid has a certain bactericidal and antiseptic effect, and can adjust the properties of coatings, such as drying speed and hardness. Diacetone alcohol acts as a solvent and cosolvent, and together with ethylene glycol butyl ether acetate, it adjusts the fluidity of the coating and helps dissolve and disperse other ingredients; Deionized water is used as the main solvent to evenly disperse the components in the system, providing environmentally friendly and safe construction conditions; BYK410 thixotropic agent gives the paint thixotropy, making it have a higher viscosity when static to prevent sagging. When it is subjected to shear force during construction, the viscosity is reduced, making it easier to apply and level.

[0028] Insulating materials of S5 include epoxy phenolic resin and glass fiber composite materials. The insulation resistance of epoxy phenolic resin and glass fiber composite materials is 500-600 megohms, voltage resistance: 10-15 kilovolts, tensile strength: 10-15 MPa, elongation at break: 150-200%, heat resistance temperature: 80℃-150℃, cold resistance temperature: -40℃-60℃, epoxy phenolic resin content 20%-50%, glass fiber content 50%-80%.

[0029] Specifically, the epoxy phenolic resin and glass fiber composite materials in the insulating material have many performance characteristics. The insulation resistance is 500-600 megohms, which can effectively block current conduction and ensure the safety of the electrical system. The voltage resistance is 10-15 kilovolts, which can withstand high voltage shocks. The tensile strength is 10-15 MPa, which can maintain structural integrity; the elongation at break is 150-200%, it is flexible, the heat-resistant temperature is 80℃-150℃, the cold-resistant temperature is -40℃-60℃, and it can adapt to different temperature environments. In terms of material composition, the epoxy phenolic resin content is 20%-50%, and the glass fiber content is 50%-80%. The two work together to give the material good performance.

[0030] In S7, the specified voltage of the resistance meter is 500V, and the insulation resistance is not less than 50MΩ.

[0031] Using the specified voltage of 500V for testing can ensure the standardization and consistency of the test. Different testers can measure under the same voltage conditions when using the resistance meter, thereby improving the reliability and comparability of the test results. Specifically, the requirement that the insulation resistance is not less than 50MΩ ensures safety performance: Insulation resistance is one of the important indicators to measure the performance of insulating materials. Low insulation resistance causes signal distortion, increased noise and equipment failure, reflecting the quality of insulating materials. The size of insulation resistance directly reflects the quality and performance of insulating materials. If the insulating material is defective, aged or damaged, its insulation resistance will usually decrease.

[0032] The difference between the second embodiment and the first embodiment is the following steps: In S1, the raw materials include a surface treatment layer, a fire-resistant layer, an insulating layer and a heating layer, and the stacking order is the first surface treatment layer, the second fire-resistant layer, the third insulating layer, the fourth heating layer, the fifth insulating layer, the sixth fire-resistant layer, and the seventh surface treatment layer.

[0033] In S1, the materials of the surface treatment layer include decorative paper and melamine glue, 40% melamine glue / 60% glue; the materials of the fire-resistant layer include glass fiber paper, resin and inorganic polymer materials include ceramic fiber and high-temperature ceramic, 30% inorganic polymer materials, 70% resin; the materials of the insulation layer include glass fiber and epoxy resin, amine curing agent or active diluent, the ratio of active amine curing agent or active diluent to epoxy resin is 30%; the materials of the heating layer include carbon fiber.

[0034] In S2, the temperature of the hot press is 180°C, the hot press time is 60 minutes, and the pressure is 50 MPa.

[0035] S3's cutting tools include a hydraulic cutting machine with a cutting pressure of 100 tons, a cutting height of 2.5 meters, and a cutting speed of 20 times per minute.

[0036] In S4, the welding aid includes the following raw materials in parts by mass: 30 parts of silicone modified acrylic resin, 27 parts of ethylene glycol butyl ether acetate, 25 parts of rosin organic acid activator, 20% of rosin modified corrosion inhibitor, 50% of rosin modified temperature resistant corrosion inhibition paste, 8 parts of triethanolamine, 15 parts of copper carbonate, 5 parts of hydroquinone, 25 parts of salicylic acid, 9 parts of diacetone alcohol, 100 parts of deionized water, and 8 parts of BYK410 thixotropic agent.

[0037] S5: Insulating materials include rubber and plastic composites or fiber and plastic composites. The insulation resistance of rubber and plastic composites is 600 megohms, voltage resistance: 15 kV, tensile strength: 15 MPa, elongation at break: 200%, heat resistance temperature: 150°C, cold resistance temperature: -60°C, rubber content 50%, plastic content 80%. Fiber and plastic composites, insulation resistance: 900 megohms, voltage resistance: 20 kV, tensile strength: 25 MPa, elongation at break: 300%, heat resistance temperature: 200°C, cold resistance temperature: -70°C, fiber content 40%, plastic content 60%.

[0038] In S7, the specified voltage of the resistance meter is 600V, and the insulation resistance is not less than 100MΩ.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The integrated heating plate manufacturing process is characterized by: The following steps are involved: S1. Stacking: Prepare the raw materials first, put them into the stacking mold in order for stacking, observe the stacked raw materials with the naked eye to check whether the gap is uniform. You can observe from different angles, such as the side, front and top, to ensure that the gap is consistent in all directions. Adjust the uneven gap by gently moving the raw materials or adjusting the position of the spacer until the gap reaches a uniform state; S2. Hot pressing: put the prepared raw materials into the preparatory hot pressing area, make sure that their surface is clean and flat, and observe whether the gap in the middle is uniform, so that they are in contact with the heating element, and gradually increase the temperature of the hot press to the required hot pressing temperature. After the material reaches the hot pressing temperature, gradually apply pressure to the material. After the hot pressing is completed, gradually reduce the temperature of the hot press to cool the material to room temperature. When the material is cooled, release the pressure and take it out of the hot press; S3. Cutting: Align the cutting tool with the mark on the material or the predetermined cutting position, start the cutting tool slowly and steadily, control the moving direction of the cutting tool, ensure that the cutting line is straight and accurate, and for thicker or harder materials, gradually increase the cutting depth to avoid material breakage or damage to the cutting tool. Check the cutting quality. After cutting, immediately check the quality of the cutting edge to see if it is flat and smooth, and whether there are burrs, cracks or deformations; S4. Power line welding: First use sandpaper, blade or detergent to clean the welding part to remove surface oxides, oil stains and impurities to ensure welding quality. Then apply welding additive evenly to the gap where the power line is connected, and then use the laser welding machine for rapid welding. S5. Insulation and fixation of the positive and negative poles of the power cord: Check whether the power cord is unobstructed after welding, check whether the positive and negative poles of the power cord are damaged or oxidized, wipe the surface of the positive and negative poles of the power cord with a clean cloth or paper towel to remove dust, oil and impurities, ensure that the surface is clean and tidy, and then attach the insulating material to the outside for insulation treatment; S6. Inspection: Check the appearance of the heating plate comprehensively. The surface should be clean, without scratches, stains, or obvious color difference. The color and gloss should be uniform. Check whether the edges of the heating plate are cut neatly and smoothly, without burrs or broken edges. Use an insulation resistance tester to measure the insulation resistance of the heating plate at a specified voltage. The insulation resistance should not be lower than a certain value to ensure good insulation performance and prevent leakage.

2. The one-piece forming preparation process of the heating plate according to claim 1, characterized in that: In S1, the raw materials include a surface treatment layer, a fire-resistant layer, an insulating layer and a heating layer, and the stacking order is the first surface treatment layer, the second fire-resistant layer, the third insulating layer, the fourth heating layer, the fifth insulating layer, the sixth fire-resistant layer, and the seventh surface treatment layer.

3. The one-piece forming process for preparing the heating plate according to claim 1, characterized in that: In S1, the material of the surface treatment layer includes decorative paper and melamine glue, the mass percentage of the decorative paper is 20-40%, the mass percentage of the melamine glue is 80-60%, the material of the fire-resistant layer includes glass fiber cloth, resin and inorganic polymer materials include ceramic fiber and high-temperature ceramic, the mass percentage of inorganic polymer materials is 20-30%, and the mass percentage of resin is 70-80%, the material of the insulating layer includes glass fiber and epoxy resin, amine curing agent or active diluent, the ratio of active amine curing agent or active diluent to epoxy resin is 10%-30%, and the material of the heating layer uses high-resistance material, wherein the high-resistance material includes nickel-cadmium aluminum, iron-chromium aluminum, carbon fiber, and graphene.

4. The one-piece forming process for preparing a heating plate according to claim 1, characterized in that: In S2, the temperature of the hot press is 120°C-180°C, the hot pressing time is 30-60 minutes, and the pressure is 5MPa-50MPa.

5. The one-piece forming preparation process of the heating plate according to claim 1, characterized in that: S3 cutting tools include hydraulic cutting machine, cutting pressure is 50-100 tons, cutting height is 1.5-2.5 meters, cutting speed is 5-20 times / minute.

6. The one-piece forming process for preparing a heating plate according to claim 1, characterized in that: In S4, the welding auxiliary agent includes the following raw materials in parts by mass: 20-30 parts of silicone modified acrylic resin, 18-27 parts of ethylene glycol butyl ether acetate, 15-25 parts of rosin organic acid activator and 17%-20% of rosin modified corrosion inhibitor, 40%-50% of rosin modified temperature resistant corrosion inhibition paste, 5-8 parts of triethanolamine, 10-15 parts of copper carbonate, 3-5 parts of hydroquinone, 20-25 parts of salicylic acid, 7-9 parts of diacetone alcohol, 80-100 parts of deionized water, and 4-8 parts of BYK410 thixotropic agent.

7. The one-piece forming preparation process of the heating plate according to claim 1, characterized in that: In S5, the insulating material includes epoxy phenolic resin and glass fiber composite material, the insulation resistance of the epoxy phenolic resin and glass fiber composite material is 500-600 megohms, the withstand voltage strength is 10-15 kilovolts, the tensile strength is 10-15 megapascals, the elongation at break is 150-200%, the heat resistance temperature is 80℃-150℃, the cold resistance temperature is -40℃-60℃, the epoxy phenolic resin content is 20%-50%, and the glass fiber content is 50%-80%.

8. The one-piece forming process for preparing a heating plate according to claim 1, characterized in that: In S7, the specified voltage of the resistance meter is 500V-600V, and the insulation resistance is not less than 50-100MΩ.

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