Wrinkle-free super-thick mica coiled material and integrated production system thereof

Abstract

The invention relates to the technical field of mica coiled material production equipment, in particular to a wrinkle-free super-thick mica coiled material and an integrated production system thereof. The integrated production system for the wrinkle-free ultra-thick mica coiled material comprises a mica paper unwinding roller, a guide roller group, a rolling composite roller group, a mica slurry mixing kettle, a first drying oven, a first hot-pressing roller group, a reinforced screen cloth unwinding roller, a second drying oven, a second hot-pressing roller group, a mica composite coiled material storage assembly, a laser cutting assembly and a finished mica composite coiled material storage roller. The mica slurry mixing kettle inputs mica slurry into the rolling composite roller set, and the mica slurry is hot-pressed and cured on the surface of the phlogopite paper to form a mica slurry curing layer; and a reinforced screen cloth layer unwound by the reinforced screen cloth unwinding roller is input into the first hot-pressing roller group and is subjected to hot-pressing compounding with the phlogopite paper of which the surface is subjected to hot-pressing compounding with the mica slurry curing layer. According to the production line, the wrinkle-free super-thick mica coiled material can be integrally and efficiently produced, and the quality and the production efficiency of the super-thick mica coiled material can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of mica coil production equipment, and in particular to a wrinkle-free ultra-thick mica coil and an integrated production system thereof. Background Art

[0002] Ultra-thick mica coil refers to a flexible mica strip with a thickness of ≥0.4mm. The electrical breakdown strength of the flexible mica strip is ≥30kv / mm. It has excellent flexibility, flame retardancy, insulation protection, high temperature resistance, corrosion resistance and other advantages. It is widely used in the automotive industry, power industry, electronics industry, etc. Ultra-thick mica coils are mainly used in new energy vehicles as wrapping materials for wires and cables, automotive exhaust pipe gasket materials, engine hood cover protection materials, power battery cell protection materials, etc.

[0003] At present, ultra-thick mica coils are made by gluing and hot-pressing several standard mica papers. Taking standard mica paper with a thickness of 0.075-0.080 mm as an example, the production of flexible ultra-thick mica coils with a thickness ≥ 0.4 mm requires at least 5 hot-pressing composite treatments. The production process is long and complicated, and the prepared flexible ultra-thick mica coils are prone to wrinkling problems, affecting the overall mechanical strength and bending strength. For ultra-thick mica coils used for hood cover protective materials, the overall thickness is ≥ 1.0 mm, and at least 13 hot-pressing composite treatments are required to produce it. Not to mention the high difficulty of production operations, the overall product yield is also low. To this end, the inventor provides a wrinkle-free ultra-thick mica coil and its integrated production system. Summary of the invention

[0004] In order to solve the technical bottleneck problems of high operation difficulty and low product yield in the existing ultra-thick mica coil production process, the present invention provides a wrinkle-free ultra-thick mica coil and an integrated production system thereof.

[0005] The wrinkle-free ultra-thick mica coil provided in this application is realized by the following technical solutions: A wrinkle-free ultra-thick mica coil comprises a phlogopite mica paper layer, a mica slurry solidified layer hot-pressed and compounded on the surface of the phlogopite mica paper, and a reinforcing mesh layer hot-pressed and compounded on the surface of the mica slurry solidified layer, wherein the thickness of the phlogopite mica paper layer is 0.075-0.16 mm, and the glue content of the phlogopite mica paper layer is 10-30 wt %; the thickness of the mica slurry solidified layer is 0.375-0.425 mm, and the glue content of the mica slurry solidified layer is 20-30 wt %; the thickness of the reinforcing mesh layer is 0.025-0.040 mm, and the reinforcing mesh layer is any one of a glass fiber mesh cloth, a carbon fiber mesh cloth, and an inorganic fiber / organic elastic fiber blended cloth; the total thickness of the wrinkle-free ultra-thick mica coil is 0.50-1.20 mm.

[0006] Preferably, the reinforcing mesh cloth layer is an inorganic fiber / organic elastic fiber blended cloth, the inorganic fibers in the inorganic fiber / organic elastic fiber blended cloth are any one of glass fiber filaments, carbon fiber filaments, basalt fiber filaments, and ceramic fiber filaments; the organic fibers in the inorganic fiber / organic elastic fiber blended cloth are any one of aramid fiber filaments, polyimide filaments, and polytetrafluoroethylene filaments.

[0007] Preferably, the density of the wrinkle-free ultra-thick mica coil is 2.0-2.5 g / cm 3 , electrical strength ≥35 kv / mm, thermal conductivity ≥0.10-0.50 / m*K, tensile strength ≥200MPa, elongation at break ≥5.0%, flame retardant grade V0.

[0008] The wrinkle-free ultra-thick mica coil provided by the present invention not only ensures good flexibility, flame retardant and fireproof properties, insulation protection performance, high temperature resistance, corrosion resistance and mechanical strength, but also can meet the needs of integrated and efficient production. The production operation is less difficult, the production efficiency of the ultra-thick mica coil is improved, and the overall production yield of the ultra-thick mica coil is also effectively improved, overcoming the problem of many defective wrinkles in traditional processing methods, thereby optimizing the total production cost of the ultra-thick mica coil and improving market competitiveness.

[0009] An integrated production system for wrinkle-free ultra-thick mica coils comprises a mica paper unwinding roller, a guide roller group, a rolling composite roller group, a mica slurry mixing kettle, a first oven, a first hot pressing roller group, a reinforced mesh cloth unwinding roller, a second oven, a second hot pressing roller group, a mica composite coil storage component, a laser cutting component, and a finished mica composite coil storage roller, wherein the mica paper unwinding roller is loaded with phlogopite mica paper; the mica slurry mixing kettle inputs mica slurry into the rolling composite roller group, and the rolling composite roller group hot-presses and solidifies the mica slurry on the surface of the phlogopite mica paper to form a mica slurry solidified layer on the surface of the phlogopite mica paper; the reinforced mesh cloth unwinding roller is loaded with a reinforced mesh cloth layer; the reinforced mesh cloth layer unwound by the reinforced mesh cloth unwinding roller is input into the first hot pressing roller group for hot-pressing and compounding with the phlogopite mica paper with the surface hot-pressed composite mica slurry solidified layer.

[0010] Preferably, the mica paper unwound by the mica paper unwinding roller is transmitted to the rolling composite roller group through the guide roller group, and at the same time, the mica slurry input from the mica slurry mixing kettle is mixed and poured into the rolling composite roller group, and the rolling composite roller group hot-presses and compounds the mica slurry on the surface of the mica paper to obtain a semi-finished mica composite coil A; the semi-finished mica composite coil A output by the rolling composite roller group is input into the first oven for drying and curing treatment to obtain a semi-finished mica composite coil B; the semi-finished mica composite coil B output by the first oven is transmitted to the first hot pressing roller group, and at the same time, the reinforced mesh unwound by the reinforced mesh unwinding roller is also input into the first hot pressing roller group, and the reinforced mesh is hot-pressed and compounded on the upper surface of the semi-finished mica composite coil B to obtain a semi-finished mica composite coil C; the semi-finished mica composite coil C output by the first hot pressing roller group is input into the second oven for drying and curing. The semi-finished mica composite coil D is obtained by dry curing treatment; the semi-finished mica composite coil D output by the second oven is input into the second hot pressing roller group for secondary hot pressing treatment to obtain the semi-finished mica composite coil E, the semi-finished mica composite coil E output by the second hot pressing roller group is temporarily stored in the mica composite coil storage component, the semi-finished mica composite coil output by the mica composite coil storage component is marked as semi-finished mica composite coil E', the semi-finished mica composite coil E' is intermittently laser cut by the laser cutting component and then stored in the finished mica composite coil storage roller; the semi-finished mica composite coil E' input into the laser cutting component is in a stagnant state, and during the laser cutting operation time of the laser cutting component, the semi-finished mica composite coil E input by the second hot pressing roller group is temporarily stored in the mica composite coil storage component.

[0011] The integrated production system provided in the present invention is specifically used for the integrated production of wrinkle-free ultra-thick mica coils. The difficulty of its production operation is relatively low compared to the traditional multiple hot pressing composite process, and can effectively improve the production efficiency of ultra-thick mica coils. In addition, it can effectively eliminate the problem of excessive wrinkles caused by traditional processing methods, and improve the flexibility, bending strength, mechanical strength and total production cost of the prepared ultra-thick mica coils.

[0012] Preferably, the rolling composite roller group includes a first rolling composite roller, a second rolling composite roller, a third rolling composite roller and a fourth rolling composite roller, and the mica slurry outputted from the mica slurry mixing kettle is fed between the first rolling composite roller and the second rolling composite roller; under the hot pressing action of the first rolling composite roller and the second rolling composite roller, the phlogopite mica paper is hot-pressed and composited with a semi-solid mica slurry solidified layer, and the phlogopite mica paper with the semi-solid mica slurry solidified layer hot-pressed and composited on the surface is input between the third rolling composite roller and the fourth rolling composite roller for secondary hot pressing and curing to obtain a semi-finished mica composite coil A.

[0013] Preferably, the mica slurry mixing kettle comprises a stirring kettle body, an anchor agitator, a driving motor, a metering pump, and a discharge pipe fitting, and the top of the stirring kettle body is connected with a mica powder input pipe and a binder input pipe, respectively; the driving motor is fixedly connected to the top of the stirring kettle body; the output shaft of the driving motor is fixedly connected to the anchor agitator through a coupling; the anchor agitator is located inside the stirring kettle body, and is used to mix mica and binder to form mica slurry; the input end of the metering pump is connected to the bottom of the stirring kettle body through a pipeline, and the output end of the metering pump is connected to the feed end of the discharge pipe fitting; the discharge end of the discharge pipe fitting is close to between the first rolling composite roller and the second rolling composite roller, and the vertical projection of the discharge pipe fitting falls inside the vertical projection of the first rolling composite roller.

[0014] By adopting the above technical scheme, the mica slurry mixing kettle evenly mixes the mica part and the binder to form mica slurry, and the prepared mica slurry is input between the first rolling composite roller and the second rolling composite roller through the discharge end of the discharge pipe. Under the hot pressing action of the first rolling composite roller and the second rolling composite roller, the mica slurry is pre-cured and composited on the surface of the phlogopite mica paper, that is, the mica slurry solidified layer is hot-pressed on the surface of the phlogopite mica paper, and then input between the third rolling composite roller and the fourth rolling composite roller for secondary hot pressing and curing to obtain a semi-finished mica composite coil A. The obtained semi-finished mica composite coil A is transported to the first oven for hot baking treatment.

[0015] Preferably, the adhesive input into the stirring kettle body by the adhesive input pipe contains a photocurable monomer and a photoinitiator; the rolling composite roller group also includes an ultraviolet curing lamp group, and the ultraviolet curing lamp group is arranged between the second rolling composite roller and the fourth rolling composite roller, and the ultraviolet light generated by the ultraviolet curing lamp group is irradiated on the surface of the semi-solid mica slurry solidified layer hot-pressed and compounded on the phlogopite mica; the phlogopite mica paper with the semi-solid mica slurry solidified layer hot-pressed and compounded on the surface output from the first rolling composite roller and the second rolling composite roller is subjected to ultraviolet curing and shaping treatment, and the phlogopite mica paper with the semi-solid mica slurry solidified layer hot-pressed and compounded on the surface after the ultraviolet curing and shaping treatment by the ultraviolet curing lamp group is input between the third rolling composite roller and the fourth rolling composite roller for secondary hot-pressing curing and shaping to obtain the semi-finished mica composite coil A.

[0016] In order to improve the pre-curing efficiency of mica slurry, a UV curing lamp group is added to the rolling composite roller group, which can effectively pre-cure and shape the mother slurry, thereby effectively solving the problem of difficult shaping processing caused by the large thickness of the mica slurry curing layer, and improving the dimensional accuracy and flatness of the ultra-thick mica coil products.

[0017] Preferably, the reinforced mesh unwound by the reinforced mesh unwinding roller is soaked with heat-reactive organic silicone water; the roller surface temperature of the first hot pressing roller group is 120-160°C; the drying temperature of the second oven is 80-120°C, and the stroke of the second oven is 8-16m.

[0018] By adopting the above technical solution, the mechanical strength and wear resistance of the finished product of the ultra-thick mica coil can be improved.

[0019] Preferably, the mica composite coil storage assembly includes a box body, an upper transmission roller group, and a lower transmission roller group, the upper transmission roller group includes a plurality of upper transmission rollers spaced apart from each other, the upper transmission rollers rotate and are fixedly connected to the box body; the central axes of the upper transmission rollers are all located in the same plane; the lower transmission roller group includes a plurality of lower transmission rollers spaced apart from each other, the box body is provided with a slide groove, the length direction of the slide groove is perpendicular to the horizontal plane; the lower transmission roller includes a lower transmission roller body and a rotating rod coaxially fixedly connected to the lower transmission roller body, the lower transmission roller body is located inside the box body; the rotating rod is slidably connected to the slide groove of the box body; the rotating rod passes through the box body and is exposed outside the box body, and the rotating rod located outside the box body is fixedly connected to a cylinder; the cylinder drives the lower transmission roller to reciprocate along the slide groove provided in the box body; the semi-finished mica composite coil E is wound between the upper transmission roller and the lower transmission roller.

[0020] The mica composite coil storage component in the present invention temporarily stores the semi-finished mica composite coil E output by the second hot pressing roller group, mainly to match the subsequent semi-finished mica composite coil E' which needs to undergo intermittent laser cutting processing after passing through the laser cutting component 9, that is, there is no need to stop the machine for laser cutting, which meets the needs of integrated production of wrinkle-free ultra-thick mica coils and effectively improves the production efficiency of wrinkle-free ultra-thick mica coils.

[0021] In summary, this application has the following advantages: 1. The wrinkle-free ultra-thick mica coil provided by the present invention not only ensures good flexibility, flame retardancy, insulation protection, high temperature resistance, corrosion resistance and mechanical strength, but also meets the needs of integrated and efficient production, thereby improving the overall production efficiency of the ultra-thick mica coil.

[0022] 2. The ultra-thick mica coil of the present invention has a high yield rate, which overcomes the problem of many defective wrinkles in traditional processing methods, effectively reduces the total production cost of the ultra-thick mica coil, and improves the market competitiveness of the product.

[0023] 3. The integrated production system provided in the present invention is specifically used for the integrated production of wrinkle-free ultra-thick mica coils. The difficulty of its production operation is relatively low compared to the traditional multiple hot pressing composite process, which can effectively improve the production efficiency of ultra-thick mica coils and improve the flexibility, bending strength and mechanical strength of ultra-thick mica coils.

[0024] 4. The use of a supporting integrated production system to produce wrinkle-free super-thick mica coils not only reduces the difficulty of operation and improves the production efficiency of wrinkle-free super-thick mica coils, but also effectively eliminates the wrinkle quality problems that are prone to occur in traditional processing, improves the quality stability of wrinkle-free super-thick mica coils, and optimizes the production cost of wrinkle-free super-thick mica coils, which is conducive to the improvement of the company's core competitiveness and the promotion and application of finished product markets. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the integrated production system of wrinkle-free ultra-thick mica coils in the embodiment.

[0026] Figure 2 Schematic diagram of the structure of the discharge pipe in the mica slurry mixing kettle in the embodiment.

[0027] Figure 3 Schematic diagram of the structure of the first hot pressing roller group in the embodiment.

[0028] Figure 4 Schematic diagram of the structure of the second hot pressing roller group in the embodiment.

[0029] Figure 5 Schematic diagram of the structure of the mica composite coil storage assembly in the embodiment.

[0030] Figure 6 Schematic diagram of the laser cutting assembly in the embodiment.

[0031] In the figure, 1, mica paper unwinding roller; 2, guide roller group; 21, guide roller A; 22, guide roller B; 3, rolling composite roller group; 31, first rolling composite roller; 32, second rolling composite roller; 33, third rolling composite roller; 34, fourth rolling composite roller; 4, mica slurry mixing kettle; 41, stirring kettle body; 411, mica powder input pipe; 412, adhesive input pipe; 42, anchor stirrer; 43, driving motor; 44, metering pump; 45, discharge pipe; 451, discharge pipe; 4 52, unloading parts; 5, first oven; 50, lifting roller A; 51, oven body; 52, transmission roller; 6, first hot pressing roller group; 60, reinforcing mesh unwinding roller; 61 first hot pressing roller A,; 62, first hot pressing roller B; 63, directional chute A; 64, push cylinder A; 65, lifting roller B; 7, second oven; 70, second hot pressing roller group; 701 second hot pressing roller A,; 702, second hot pressing roller B; 703, directional chute B; 704, push cylinder B; 705, lifting roller C; 8. Mica composite coil storage assembly; 81. Box body; 82. Upper transmission roller group; 821. Upper transmission roller; 83. Lower transmission roller group; 831. Lower transmission roller; 8311. Lower transmission roller body; 8312. Turning rod; 84. Cylinder; 9. Laser cutting assembly; 90. Connecting rod; 901. Laser emitter A; 902. Laser emitter B; 91. Barless cylinder; 92. Laser emitter C; 93. Clamping roller group; 931. Clamping roller A; 932. Clamping roller B; 933. Pushing cylinder; 934. Forming chute C; 10. Finished mica composite coil storage roller; 100. Guide roller C. DETAILED DESCRIPTION

[0032] The technical solution of the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. Example

[0033] The wrinkle-free ultra-thick mica coil includes a phlogopite paper layer, a mica slurry solidified layer heat-pressed and compounded on the surface of the phlogopite paper, and a reinforcing mesh layer heat-pressed and compounded on the surface of the mica slurry solidified layer. The thickness of the phlogopite mica paper layer is 0.075-0.16mm, and the glue content of the phlogopite mica paper layer is 10-30wt%. The thickness of the mica slurry solidified layer is 0.375-0.425mm, and the glue content of the mica slurry solidified layer is 20-30wt%. The thickness of the reinforcing mesh layer is 0.025-0.040mm, and the reinforcing mesh layer is any one of glass fiber mesh cloth, carbon fiber mesh cloth, and inorganic fiber / organic elastic fiber blended cloth. The total thickness of the wrinkle-free ultra-thick mica coil is 0.50-1.20mm.

[0034] The thickness requirements of wrinkle-free super thick mica coils vary according to different application scenarios. As the wrapping material for wires and cables, the wrinkle-free super thick mica coils are required to have a thickness of ≥0.5mm. The wrinkle-free super thick mica coils include a 0.075-0.080mm thick standard phlogopite mica paper layer, a 0.42-0.45mm thick mica slurry solidified layer on the surface of the standard phlogopite mica paper layer, and a 0.025-0.040mm thick reinforcing mesh layer.

[0035] The wrinkle-free super-thick mica coil is used as a protective material for the hood cover, and its thickness is required to be ≥1.0mm. The wrinkle-free super-thick mica coil includes a standard phlogopite paper layer with a thickness of 0.075-0.080mm, a mica slurry solidified layer located on the upper and lower surfaces of the standard phlogopite paper layer, and a reinforced mesh layer with a thickness of 0.025-0.040mm. The thickness of the single-layer mica slurry solidified layer is 0.45-0.50mm. Alternatively, the wrinkle-free super-thick mica coil includes a standard phlogopite paper layer with a thickness of 0.075-0.080mm, a mica slurry solidified layer with a thickness of 0.90-0.95mm located on one surface of the standard phlogopite paper layer, and a reinforced mesh layer with a thickness of 0.025-0.040mm.

[0036] In actual application, the reinforcing mesh layer is preferably an inorganic fiber / organic elastic fiber blended fabric, which can improve the flexibility and bending resistance of the wrinkle-free ultra-thick mica coil on the one hand, and on the other hand improve the overall processing performance, increase the yield rate of the finished product, and optimize the total production cost of the wrinkle-free ultra-thick mica coil.

[0037] The inorganic fiber in the inorganic fiber / organic elastic fiber blended fabric is any one of glass fiber filaments, carbon fiber filaments, basalt fiber filaments, and ceramic fiber filaments. Preferably, the organic fiber in the inorganic fiber / organic elastic fiber blended fabric is any one of aramid fiber filaments, polyimide filaments, and polytetrafluoroethylene filaments. The organic fiber suitable for industrial mass production is preferably aramid fiber filaments, and the inorganic fiber is glass fiber filaments. If thermal conductivity is required, carbon fiber filaments can be appropriately mixed.

[0038] refer to Figure 1 In order to meet the continuous production requirements of wrinkle-free ultra-thick mica coils, the inventor team designed an integrated production system for wrinkle-free ultra-thick mica coils, including a mica paper unwinding roller 1, a guide roller group 2, a rolling composite roller group 3, a mica slurry mixing kettle 4, a first oven 5, a first hot pressing roller group 6, a reinforced mesh unwinding roller 60, a second oven 7, a second hot pressing roller group 70, a mica composite coil storage component 8, a laser cutting component 9, and a finished mica composite coil storage roller 10.

[0039] refer to Figure 1, the mica paper unwinding roller 1 rotates and is fixedly connected to the bracket, the bracket is fixedly connected to the ground, and the bracket is fixedly connected to a motor for driving the mica paper unwinding roller 1 to rotate around its own axis. The mica paper unwinding roller 1 is loaded with phlogopite paper, and the motor controls the conveying speed of the phlogopite paper. The thickness of the phlogopite paper affects the processing yield rate. If the thickness of the phlogopite paper is too thick, the glue content is too high in order to meet the flexibility requirements, resulting in a decrease in the overall flame retardant protection performance and electrical breakdown strength. There are two types of phlogopite that meet the processing yield rate requirements. The first is standard phlogopite paper, 0.075-0.080mm thick, with a glue content of at least 10wt%; the other is 0.15-0.16mm thick phlogopite paper, with a glue content of at least 20wt%. Taking into account the production cost, the phlogopite paper selected is the standard phlogopite paper with mature technology and economical price, with a glue content of 10wt%.

[0040] refer to Figure 1 The production method of the mica slurry solidified layer in the wrinkle-free ultra-thick mica coil is as follows: the mica slurry configured in the mica slurry mixing kettle 4 is input into the rolling composite roller group 3, the mica slurry is hot-pressed and solidified on the surface of the phlogopite mica paper, and the mica slurry solidified layer is formed by hot-pressing and solidifying on the surface of the phlogopite mica paper.

[0041] refer to Figure 1 The production method of the reinforced mesh in the wrinkle-free ultra-thick mica coil is as follows: the reinforced mesh unwinding roller 60 is loaded with a reinforced mesh layer with a thickness of 0.025-0.040 mm. The reinforced mesh layer unwound by the reinforced mesh unwinding roller 60 is input into the first hot pressing roller group 6. Under the hot pressing action of the first hot pressing roller group 6, the reinforced mesh layer and the phlogopite mica paper with the surface hot pressing compound mica slurry solidified layer are hot pressed and compounded to form a semi-finished ultra-thick mica coil.

[0042] refer to Figure 1 The production process of wrinkle-free extra-thick mica coil is as follows: S1. Mica paper unwinding roller 1 unwinds phlogopite paper; S2. The phlogopite paper is transmitted through the guide roller group 2 to the rolling composite roller group 3. At the same time, the mica slurry configured in the mica slurry mixing kettle 4 is poured into the rolling composite roller group 3. The mica slurry is poured on the upper surface of the phlogopite mica paper. The rolling composite roller group 3 hot presses and rolls the mica paper to obtain a semi-finished mica composite coil A. S3. The semi-finished mica composite coil A output by the rolling composite roller group 3 is input into the first oven 5 for drying and curing to obtain a semi-finished mica composite coil B. The temperature in the first oven 5 is set to 120-160°C. The travel of the semi-finished mica composite coil A in the first oven 5 is 8-16m, and the transmission speed is 1-2m / min; S4. The semi-finished mica composite coil B output from the first oven 5 is transferred to the first hot pressing roller group 6. The roller surface temperature of the hot pressing rollers in the first hot pressing roller group 6 is 140-160°C. At the same time, the reinforcing mesh unwound by the reinforcing mesh unwinding roller 60 is also input into the first hot pressing roller group 6. The reinforcing mesh is pre-impregnated with a heat-reactive organic silicone resin. Under the hot pressing action of the first hot pressing roller group 6, the reinforcing mesh is hot-pressed and laminated to the upper surface of the semi-finished mica composite coil B to obtain a semi-finished mica composite coil C. S5. The semi-finished mica composite coil C outputted from the first hot pressing roller group 6 is input into the second oven 7 for drying and curing to obtain a semi-finished mica composite coil D. The temperature in the second oven 6 is set to 80-120°C. The travel of the semi-finished mica composite coil A in the second oven 6 is 8-16m, and the transmission speed is 1-2m / min. S6. The semi-finished mica composite coil D output from the second oven 7 is input into the second hot pressing roller group 70 for secondary hot pressing to obtain a semi-finished mica composite coil E, wherein the hot pressing roller in the second hot pressing roller group 70 is a silicone rubber roller, and the roller surface temperature of the silicone rubber roller is 120-140°C; S7. The semi-finished mica composite coil E output by the second hot pressing roller group 70 is temporarily stored in the mica composite coil storage component 8, and the semi-finished mica composite coil output by the mica composite coil storage component 8 is marked as a semi-finished mica composite coil E'. The semi-finished mica composite coil E' will be stopped when it is transmitted to the laser cutting component 9, that is, the semi-finished mica composite coil E' input into the laser cutting component 9 is in a stagnant state. During the laser cutting operation time of the laser cutting component 9, the semi-finished mica composite coil E input by the second hot pressing roller group 70 is temporarily stored in the mica composite coil storage component 8. After the semi-finished mica composite coil E' is intermittently laser cut by the laser cutting component 9, it is stored in the finished mica composite coil storage roller 10.

[0043] refer to Figure 1 , the guide roller group 2 includes a guide roller A21 and a guide roller B22. The phlogopite paper unwound by the mica paper unwinding roller 1 is sequentially transmitted to the rolling composite roller group 3 through the guide roller A21 and the guide roller B22. The relative ground height of the guide roller A21 is greater than the relative ground height of the mica paper unwinding roller 1 and the guide roller B22. The relative ground height of the guide roller B22 is less than the relative ground height of the guide roller A21, but greater than the relative ground height of the mica paper unwinding roller 1. The phlogopite paper transmitted between the guide roller A21 and the guide roller B22 is perpendicular to the horizontal plane. The phlogopite paper output by the guide roller B22 is parallel to the horizontal plane.

[0044] refer to Figure 1In order to improve the flatness of the transmitted phlogopite paper, an opening roller 23 is arranged between the guide roller B22 and the rolling composite roller group 3. The phlogopite paper output by the opening roller 23 is parallel to the horizontal plane. The opening treatment by the opening roller 23 can effectively improve the flatness of the finished ultra-thick mica coil, that is, the finished product has no wrinkles.

[0045] refer to Figure 1 The rolling composite roller group 3 is the core equipment, and its specific structure is as follows: the rolling composite roller group 3 includes a first rolling composite roller 31, a second rolling composite roller 32, a third rolling composite roller 33 and a fourth rolling composite roller 34. The central axis of the first rolling composite roller 31 and the central axis of the fourth rolling composite roller 34 are in the same horizontal plane, and the central axis of the second rolling composite roller 32 and the central axis of the third rolling composite roller 33 are in the same vertical plane.

[0046] refer to Figure 1 The first rolling composite roller 31, the second rolling composite roller 32, the third rolling composite roller 33 and the fourth rolling composite roller 34 are all rotatably connected to the bracket, and the bracket is fixedly connected to the ground. The first rolling composite roller 31 is fixedly connected to the motor through a coupling, and the motor is fixedly connected to the bracket, which is used to drive the first rolling composite roller 31 to rotate around its own axis. The transmission speed and tension of the phlogopite paper between the first rolling composite roller 31 and the second rolling composite roller 32 can be controlled by the motor. The fourth rolling composite roller 34 is also fixedly connected to the motor through a coupling, and the motor is fixedly connected to the bracket, which is used to drive the fourth rolling composite roller 34 to rotate around its own axis. The transmission speed and tension of the phlogopite paper between the third rolling composite roller 33 and the fourth rolling composite roller 34 can be controlled by the motor. The second rolled composite roller 32 and the third rolled composite roller 33 are not connected to the motor, but the second rolled composite roller 32 and the third rolled composite roller 33 can run up and down along the bracket to adjust the spacing between the first rolled composite roller 31 and the second rolled composite roller 32, and the spacing between the third rolled composite roller 33 and the fourth rolled composite roller 34, thereby controlling the thickness of the wrinkle-free ultra-thick mica coil product.

[0047] refer to Figure 1The bracket on which the second rolled composite roller 32 and the third rolled composite roller 33 are mounted has two mutually spaced chutes, marked as chutes A and chutes B. The second rolled composite roller 32 is slidably connected to the chutes A of the bracket, and the third rolled composite roller 33 is slidably connected to the chutes B of the bracket. Two cylinders, marked as cylinder A and cylinder B, are fixedly connected to the bracket on which the second rolled composite roller 32 and the third rolled composite roller 33 are mounted. The push rod of cylinder A is fixedly connected to the upper bearing, and the second rolled composite roller 32 rotates and is fixedly connected to the bearing on the push rod of cylinder A. Cylinder A drives the second rolled composite roller 32 to slide up and down in the chutes A of the bracket, thereby adjusting the spacing between the first rolled composite roller 31 and the second rolled composite roller 32. The push rod of cylinder B is fixedly connected to the upper bearing, and the third rolled composite roller 33 rotates and is fixedly connected to the bearing on the push rod of cylinder B. Cylinder B drives the third rolled composite roller 33 to slide up and down in the slide groove B of the bracket, thereby adjusting the distance between the third rolled composite roller 33 and the fourth rolled composite roller 34.

[0048] refer to Figure 1 The operation process of the rolling composite roller group 3 is as follows: the mica slurry output from the mica slurry mixing kettle 4 is fed between the first rolling composite roller 31 and the second rolling composite roller 32, that is, the mica slurry is poured on the upper surface of the transmitted phlogopite mica paper, and under the hot pressing action of the first rolling composite roller 31 and the second rolling composite roller 32, the phlogopite mica paper is hot-pressed and composited with a semi-solid mica slurry solidified layer, and the phlogopite mica paper with the semi-solid mica slurry solidified layer hot-pressed and composited on the surface is input between the third rolling composite roller 33 and the fourth rolling composite roller 34 for secondary hot pressing and curing to obtain a semi-finished mica composite coil A.

[0049] refer to Figure 1 The mica slurry mixing kettle 4 includes a mixing kettle body 41, an anchor stirrer 42, a drive motor 43, a metering pump 44, and a discharge pipe 45. Based on the structural design for the convenience of mica slurry transmission, the mixing kettle body 41 is fixedly connected to the second floor of the building, and the rolling composite roller group 3 is fixedly connected to the first floor of the building, that is, the rolling composite roller group 3 is located below the mixing kettle body 41, and the configured mica slurry can flow between the first rolling composite roller 31 and the second rolling composite roller 32 under gravity.

[0050] refer to Figure 1, a mica powder input pipe 411 and a binder input pipe 412 are fixedly connected to the top of the stirring kettle body 41. The mica powder input pipe 411 is used to feed mica powder into the stirring kettle body 41. The binder input pipe 412 is used to feed binder into the stirring kettle body 41. The driving motor 43 is fixedly connected to the top of the stirring kettle body 41, and the central axis of the output shaft of the driving motor 43 coincides with the central axis of the stirring kettle body 41. The output shaft of the driving motor 43 is fixedly connected to the anchor stirrer 42 through a coupling, and the anchor stirrer 42 is located inside the stirring kettle body 41, that is, the stirring speed of the anchor stirrer 42 is controlled by the driving motor 43, so as to evenly mix the mica powder and the binder to form a mica slurry.

[0051] refer to Figure 1 The casting amount of mica slurry affects the thickness of the finished product of wrinkle-free ultra-thick mica coil, so the metering pump 44 is required to accurately measure the casting amount of mica slurry per unit time. The input end of the metering pump 44 is connected to the bottom of the stirring tank body 41 through a pipeline, and the output end of the metering pump 44 is connected to the feed end of the discharge pipe 45. The feed end of the discharge pipe 45 is fixedly connected to the output end of the metering pump 44, and the discharge end of the discharge pipe 45 is close to the first rolling composite roller 31 and the second rolling composite roller 32, and the vertical projection of the discharge pipe 45 falls inside the vertical projection of the first rolling composite roller 31.

[0052] refer to Figure 2 In order to ensure the flatness of the formed mica slurry solidified layer, the discharge pipe 45 includes a discharge pipe 451 and a pouring piece 452. The feed end of the discharge pipe 451 is fixedly connected to the output end of the metering pump 44, and the discharge end of the discharge pipe 45 is fixedly connected to the pouring piece 452. A main channel 4521 is formed in the pouring piece 452, and the discharge pipe 451 is connected to the main channel 4521 of the pouring piece 452. A plurality of branch channels 4522 connected to the main channel 4521 are formed in the pouring piece 452, and the central axis of the branch channel 4522 is perpendicular to the central axis of the main channel 4521. The diameter of the branch channel 4522 is 5mm, the distance between adjacent branch channels 4522 is 8mm, and the distance between the central axes of adjacent branch channels 4522 is 13mm. The central axis of the branch channel 4522 forms a line angle of 15-30° with the phlogopite paper transmitted between the first rolling composite roller 31 and the second rolling composite roller 32. In the actual production prototype, the central axis of the branch channel 4522 forms a line angle of 30° with the phlogopite paper.

[0053] refer to Figure 1In order to achieve rapid pre-curing and shaping of mica slurry, the binder input into the stirring kettle body 41 through the binder input pipe 412 contains photocuring monomers and photoinitiators, and the rolling composite roller group 3 is equipped with a UV curing lamp group 45. The UV curing lamp group 45 is arranged between the second rolling composite roller 32 and the fourth rolling composite roller 34, and is located on the upper side of the phlogopite mica paper with the semi-solid mica slurry solidified layer hot-pressed and composited on the surface. The ultraviolet light generated by the UV curing lamp group 45 irradiates the surface of the semi-solid mica slurry solidified layer hot-pressed and composited on the phlogopite mica, and the photocuring monomers in the mica slurry react rapidly under the catalysis of the photoinitiator and ultraviolet light, which plays a role in rapid UV pre-curing and shaping of the mica slurry, and controls the dimensional accuracy of the wrinkle-free ultra-thick mica coil. The phlogopite mica paper with a surface hot-pressed composite semi-solid mica slurry solidified layer that has been cured by ultraviolet light of the ultraviolet curing lamp group 45 is input between the third rolling composite roller 33 and the fourth rolling composite roller 34 for secondary hot-pressing curing to obtain a semi-finished mica composite coil A.

[0054] refer to Figure 1 A lifting roller A50 is provided between the fourth rolling composite roller 34 and the first oven 5. The lifting roller A50 rotates and is fixedly connected to the bracket, the bracket is fixedly connected to the ground of the first floor, a motor is fixedly connected to the bracket, and the output shaft of the motor is coaxially fixedly connected to the lifting roller A50, which is used to drive the lifting roller A50 to rotate around its own axis to control the transmission speed and tension of the phlogopite paper with a surface hot-pressed composite semi-solid mica slurry solidified layer. The central axis of the lifting roller A50 is located in the same horizontal plane as the central axis of the second rolling composite roller 32. The transmission direction of the phlogopite paper with a surface hot-pressed composite semi-solid mica slurry solidified layer transmitted between the fourth rolling composite roller 34 and the lifting roller A50 is in a vertical direction. The transmission direction of the phlogopite paper with a surface hot-pressed composite semi-solid mica slurry solidified layer output by the lifting roller A50 is in a horizontal direction.

[0055] refer to Figure 1 The first oven 5 and the second oven 7 have the same structure. Taking the first oven 5 as an example, the first oven 5 includes an oven body 51 and a plurality of transmission rollers 52 that are rotatably and fixedly connected to the oven body 51. The semi-finished mica composite coil A is wound around the transmission rollers 52. The height of the input end of the oven body 51 relative to the ground is greater than the height of the output end of the oven body 51 relative to the ground. The semi-finished mica composite coil B output from the first oven 5 is horizontally transmitted to the first hot pressing roller group 6.

[0056] refer to Figure 1 and Figure 3The first hot pressing roller group 6 includes a first hot pressing roller A61 that rotates and is fixedly connected to the bracket, and a first hot pressing roller B62 that can move up and down along the bracket. The first hot pressing roller B62 is located directly below the first hot pressing roller A61. A motor is fixedly connected to the bracket, and the output shaft of the motor is coaxially fixedly connected to the first hot pressing roller A61, which can drive the first hot pressing roller A6 to rotate around its own axis to control the transmission speed and tension of the semi-finished mica composite coil B. The first hot pressing roller B62 is not connected to a motor. A directional slide groove A63 is provided on the bracket, and the first hot pressing roller B62 is slidably connected to the directional slide groove A63 on the bracket. A push cylinder A64 is fixedly connected to the bracket, and the push rod of the push cylinder A64 rotates and is fixedly connected to the rotating rod of the first hot pressing roller B62, that is, the push cylinder A64 drives the first hot pressing roller B62 to move up and down in the directional slide groove A63 to adjust the spacing and pressure between the first hot pressing roller A61 and the first hot pressing roller B62.

[0057] refer to Figure 1 The reinforced mesh unwinding roller 60 rotates and is fixedly connected to the top of the bracket on which the first hot pressing roller group 6 is mounted. Another motor is fixedly connected to the bracket. The output shaft of the motor is coaxially fixedly connected to the reinforced mesh unwinding roller 60, which can drive the reinforced mesh unwinding roller 60 to rotate around its own axis to control the unwinding speed and tension of the reinforced mesh.

[0058] refer to Figure 1 A lifting roller B65 is provided between the first hot pressing roller group 6 and the second oven 7, and the central axis of the lifting roller B65 is in the same plane as the central axis of the lifting roller A50. The lifting roller B65 rotates and is fixedly connected to the bracket, and the bracket is fixedly connected to the ground of the first floor. The bracket is fixedly connected to a motor, and the output shaft of the motor is coaxially fixedly connected to the lifting roller B65, which is used to drive the lifting roller B65 to rotate around its own axis to control the transmission speed and tension of the semi-finished mica composite coil C. The transmission direction of the semi-finished mica composite coil C derived from the lifting roller B65 is horizontal, and the semi-finished mica composite coil C is input into the second oven 7 for drying and curing to obtain a semi-finished mica composite coil D.

[0059] refer to Figure 1 and Figure 4The second hot pressing roller group 70 includes a second hot pressing roller A701 that is rotatably and fixedly connected to the bracket, and a second hot pressing roller B702 that can move up and down along the bracket. The second hot pressing roller B702 is located directly below the second hot pressing roller B701. A motor is fixedly connected to the bracket, and the output shaft of the motor is coaxially fixedly connected to the second hot pressing roller A701, which can drive the second hot pressing roller A701 to rotate around its own axis to control the transmission speed and tension of the semi-finished mica composite coil D. The second hot pressing roller B702 is not connected to a motor. A directional slide groove B703 is provided on the bracket, and the second hot pressing roller B702 is slidably connected to the directional slide groove B703 on the bracket. The bracket is fixedly connected to a pushing cylinder B704, and the push rod of the pushing cylinder B704 rotates and is fixedly connected to the rotating rod of the second hot pressing roller B702, that is, the pushing cylinder B704 drives the second hot pressing roller B702 to move up and down in the directional slide groove B703, adjusting the spacing and pressure between the second hot pressing roller A701 and the second hot pressing roller B702.

[0060] refer to Figure 1 and Figure 4 A lifting roller C705 is provided between the second hot pressing roller group 70 and the mica composite coil storage assembly 8, and the central axis of the lifting roller C705 is in the same plane as the central axis of the lifting roller A50. The lifting roller C705 rotates and is fixedly connected to the bracket, and the bracket is fixedly connected to the ground of the first floor. The bracket is fixedly connected to a motor, and the output shaft of the motor is coaxially fixedly connected to the lifting roller C705, which is used to drive the lifting roller C705 to rotate around its own axis to control the transmission speed and tension of the semi-finished mica composite coil E. The transmission direction of the semi-finished mica composite coil E derived from the lifting roller C705 is horizontal, and the semi-finished mica composite coil E is input into the mica composite coil storage assembly 8.

[0061] refer to Figure 1 and Figure 5 The mica composite coil storage assembly 8 includes a box body 81, an upper transmission roller group 82 that rotates and is fixedly connected to the box body 81, and a lower transmission roller group 83 that can slide up and down along the box body 81. Among them, the upper transmission roller group 82 includes a plurality of upper transmission rollers 821 that are spaced apart from each other, and the central axes of the upper transmission rollers 821 are all located on the same plane. The transmission rollers 821 rotate and are fixedly connected to the box body 81.

[0062] refer to Figure 1 and Figure 5The lower transmission roller group 83 includes a plurality of lower transmission rollers 831 spaced apart from each other. The semi-finished mica composite coil E is wound between the upper transmission roller 821 and the lower transmission roller 831. The lower transmission roller 831 includes a lower transmission roller body 8311 and a rotating rod 8312 coaxially fixedly connected to the lower transmission roller body 8311, and the lower transmission roller body 8311 is located inside the box body 81. The box body 81 is provided with a plurality of mutually spaced chutes 811, the length direction of the chutes 811 is perpendicular to the horizontal plane, and the number of the chutes 811 is equal to the number of the lower transmission rollers 831. The rotating rod 8312 of the lower transmission roller 831 is slidably connected to the chutes 811 of the box body 81. The rotating rod 8312 of the lower transmission roller 831 rotates and penetrates the box body 81 to be exposed outside the box body 81. The rotating rod 8312 located outside the box body 81 rotates and is fixedly connected to the cylinder 84, that is, the push rod of the cylinder 84 is fixedly connected to the upper bearing, and the rotating rod 8312 located outside the box body 81 rotates and is fixedly connected to the bearing on the push rod of the cylinder 84. The cylinder 84 drives the lower transmission roller 831 to reciprocate up and down along the slide 811 opened in the box body 81, and temporarily stores the semi-finished mica composite coil E.

[0063] refer to Figure 1 and Figure 6 The laser cutting assembly 9 includes a connecting rod 90 fixedly connected between the brackets, a laser emitter A901 fixedly connected to the left side of the connecting rod 90, a laser emitter B902 fixedly connected to the right side of the connecting rod 90, a barless cylinder 91 fixedly connected to the connecting rod 90, a laser emitter C92 fixedly connected to the barless cylinder 91 and a clamping roller group 93, and the laser emitter 92 reciprocates axially along the barless cylinder 91.

[0064] refer to Figure 1 and Figure 6 The clamping roller group 93 includes a clamping roller A931 and a clamping roller B932. The clamping roller A931 is rotatably and fixedly connected to a bracket, and the clamping roller B932 is slidably connected to the same bracket. The clamping roller B932 is located directly above the clamping roller A931. The plane where the central axis of the clamping roller A931 and the central axis of the clamping roller B932 are located is perpendicular to the horizontal plane. The support is fixedly connected with a push cylinder C933, and the support is provided with a shaping chute C934. The clamping roller B932 rotates and is fixedly connected to the push rod of the push cylinder C933. The push cylinder C933 drives the clamping roller B932 to slide up and down in the shaping chute C934 of the support, thereby clamping the semi-finished mica composite coil E' to make it stagnant. The mica composite coil storage component 8 temporarily stores the semi-finished mica composite coil E output by the second hot pressing roller group 70, and realizes the precise positioning and laser cutting of the laser cutting component 9. The semi-finished mica composite coil E' between the mica composite coil storage component 8 and the clamping roller group 93 is horizontally transmitted, and the laser cutting component 9 realizes the precise positioning and laser cutting.

[0065] Laser emitter A901 and laser emitter B902 are normally open and used to cut semi-finished mica composite coil E' to ensure the wide size accuracy of wrinkle-free super-thick mica coil. Laser emitter C92 is selectively turned on according to the application scenario of wrinkle-free super-thick mica coil. If laser emitter C92 is turned on, the mica composite coil storage component 8 is required to temporarily store the semi-finished mica composite coil E output by the second hot pressing roller group 70. If the wrinkle-free super-thick mica coil is the intermediate material of the hood cover protective material, the semi-finished mica composite coil E' needs to be pulse cut, and the cross-section line is laser-etched on the semi-finished mica composite coil E' and then stored in the finished mica composite coil storage roller 10.

[0066] refer to Figure 1 and Figure 6 A guide roller C100 is provided between the clamping roller group 93 and the finished mica composite coil storage roller 10. The semi-finished mica composite coil E' after laser cutting is guided by the guide roller C and then stored in the finished mica composite coil storage roller 10. The semi-finished mica composite coil E' after laser cutting between the guide roller C and the clamping roller group 93 is horizontally transmitted. The finished mica composite coil storage roller 10 is fixedly connected to the bracket, the bracket is fixedly connected to the ground, and a motor for rotating the finished mica composite coil storage roller 10 around its own axis is fixedly connected to the bracket, which is used to control the winding speed and tension of the semi-finished mica composite coil E' after laser cutting. The guide roller C rotates and is fixedly connected to the same bracket, but it is not connected to the motor.

[0067] The density of the wrinkle-free super-thick mica coil produced by the integrated production system of wrinkle-free super-thick mica coil is 2.0-2.5 g / cm 3 The electrical strength is ≥35 kv / mm, the thermal conductivity is controlled between 0.10-0.50W / m*K, the tensile strength is ≥200MPa, the elongation at break is ≥5.0%, and the flame retardant grade is V0.

[0068] The wrinkle-free ultra-thick mica coil samples produced by the integrated production system of wrinkle-free ultra-thick mica coils have a thickness requirement of 0.5-0.52mm, the thickness of the standard phlogopite mica paper layer used is 0.075-0.080mm, the mica slurry solidified layer with a thickness of 0.45mm located on the surface of the standard phlogopite mica paper layer, the reinforced mesh layer is a glass fiber mesh cloth, electrical alkali-free glass cloth EW30, with a thickness of 0.030±0.005mm, and a plain weave.

[0069] The formula of the mica slurry used in the mica slurry curing layer is as follows: 80 parts by weight of 800-mesh phlogopite powder and 23.7 parts by weight of a binder. The binder is made of organic silica gel water, an initiator, and a photopolymerization monomer.

[0070] The preparation method of the adhesive is as follows: first, 0.05g of diethylenetriamine, 100g of KR-242A silicone resin, and 45g of FM-7725 modified hydroxysiloxane are pre-reacted at 68°C for 120s, and then cooled to 4°C. 144.8g of methanol is added and stirred at 100rpm for 10min, 0.15g of diethylenetriamine is added, and stirred at 60rpm for 2.0min. Part of the organic solvent is removed by reduced pressure distillation to obtain an organic silica gel water with a solid content of 80wt%. Take 100g of the above-prepared organic silica gel water, add 20g of hydroxy-terminated methyl vinyl silicone oil, IOTA 1203V, and 15g of tris(2-hydroxyethyl)isocyanuric acid triacrylate, mix well to obtain an adhesive, and when used, 0.05-0.2wt% of the photoinitiator TPO in the above-prepared adhesive can be used.

[0071] The production process of wrinkle-free extra-thick mica coil is as follows: S1. Mica paper unwinding roller 1 unwinds standard phlogopite mica paper with a thickness of 0.075-0.080mm; S2. The phlogopite paper is sequentially transmitted through the guide roller A21, the guide roller B22, and the width opening roller 23 to the first rolling composite roller 31 and the second rolling composite roller 32 of the rolling composite roller group 3. The spacing between the first rolling composite roller 31 and the second rolling composite roller 32 is 0.50 mm, and the transmission speed of the standard phlogopite paper is 1 m / min; At the same time, 80 parts by weight of 800-mesh phlogopite powder are added to the stirring kettle body 41 through the mica powder input pipe 411, 23.7 parts by weight of binder and 0.2 parts by weight of initiator TPO are added to the stirring kettle body 41 through the binder input pipe 412, the drive motor 43 is turned on, and the anchor stirrer 42 is stirred at 100 rpm for 10 minutes, that is, the mica slurry mixing kettle 4 completes the configuration of the mica slurry, and the configured mica slurry is poured and rolled on the upper surface of the phlogopite paper between the first rolling composite roller 31 and the second rolling composite roller 32. The mica slurry is poured The construction rate is 750g / min. Under the hot pressing and rolling compounding of the first rolling compound roller 31 and the second rolling compound roller 32, the semi-solid mica slurry solidified layer is pre-cured on the phlogopite paper, which is the semi-finished mica composite coil A'. The semi-finished mica composite coil A' is treated by the ultraviolet curing lamp group 45 for light curing and shaping. The LED UV curing lamp has a power of 35W and ultraviolet light ‌UVB, 1500mW / cm², and is input between the third rolling compound roller 33 and the fourth rolling compound roller 34 for secondary hot pressing and curing to obtain the semi-finished mica composite coil A; S3. The semi-finished mica composite coil A output by the rolling composite roller group 3 is input into the first oven 5 through the lifting roller A50 for drying and curing to obtain a semi-finished mica composite coil B. The temperature in the first oven 5 is set to 145°C, the travel of the semi-finished mica composite coil A is 12m, and the transmission speed is 1m / min; S4. The semi-finished mica composite coil B output from the first oven 5 is transferred to the first hot pressing roller group 6. The spacing between the first hot pressing roller A61 and the first hot pressing roller B62 is 0.50 mm. The roller surface temperature of the first hot pressing roller A61 and the first hot pressing roller B62 is 145° C. At the same time, the electrical alkali-free glass cloth EW30 unwound by the reinforcing mesh unwinding roller 60 is also input into the first hot pressing roller group 6. The electrical alkali-free glass cloth EW30 is firstly immersed in the heat-reactive organic silicone resin for 30 seconds, and then the electrical alkali-free glass cloth EW30 is taken out and dried at 120° C. for 5 minutes, and then compounded with the release paper and rolled up on the reinforcing mesh unwinding roller 60. Under the hot pressing action of the first hot pressing roller group 6, the electrical alkali-free glass cloth EW30 is hot-pressed and compounded on the upper surface of the semi-finished mica composite coil B to obtain the semi-finished mica composite coil C; The preparation of the heat-reactive silicone resin is as follows: 0.05 g of diethylenetriamine, 100 g of KR-242A silicone resin, and 45 g of FM-7725 modified hydroxy siloxane are pre-reacted at 68° C. for 120 s, and then 144.8 g of methanol is added after cooling to 4° C. and stirred at 100 rpm for 10 min, and 0.15 g of diethylenetriamine is added, and stirred at 60 rpm for 2.0 min to obtain the heat-reactive silicone resin; S5. The semi-finished mica composite coil C outputted from the first hot pressing roller group 6 is input into the second oven 7 through the lifting roller B65 for drying and curing to obtain a semi-finished mica composite coil D. The temperature in the second oven 6 is set to 105°C, the travel of the semi-finished mica composite coil A is 12m, and the transmission speed is 1m / min; S6. The semi-finished mica composite coil D output from the second oven 7 is input into the second hot pressing roller group 70 for secondary hot pressing treatment to obtain a semi-finished mica composite coil E. The spacing between the second hot pressing roller A701 and the second hot pressing roller B702 is 0.50 mm. The second hot pressing roller A701 and the second hot pressing roller B702 are both silicone rubber rollers, and the roller surface temperature of the silicone rubber roller is 125°C. S7. The semi-finished mica composite coil E outputted from the second hot pressing roller group 70 is temporarily stored in the mica composite coil storage component 8 via the lifting roller C705. The semi-finished mica composite coil outputted from the mica composite coil storage component 8 is marked as the semi-finished mica composite coil E'. The semi-finished mica composite coil E' is transmitted to the laser cutting component 9, and the clamping roller A931 and the clamping roller B932 are stopped, that is, the semi-finished mica composite coil E' input into the laser cutting component 9 is in a stagnant state. The laser emitter A901 and the laser emitter B902 perform the laser cutting operation to remove the excess scraps on both sides. The laser emitter C92 performs pulse cutting and laser etches a cross-section line on the semi-finished mica composite coil E'. During the laser cutting operation, the semi-finished mica composite coil E input by the second hot pressing roller group 70 is temporarily stored in the mica composite coil storage component 8, that is, the cylinder 84 drives the lower transmission roller 831 to move downward, and the input semi-finished mica composite coil E is temporarily stored between the lower and upper transmission rollers 821 and the transmission roller 831. The finished mica composite coil (thickness 0.50mm, width 80cm) after laser cutting is stored in the finished mica composite coil storage roller 10 through the guide roller C100.

[0072] The density of the wrinkle-free ultra-thick mica coil is 2.14 g / cm 3 The electrical strength is between 35.8 kv / mm, the thermal conductivity is controlled between 0.29W / m*K, the tensile strength is 205MPa, the elongation at break is 5.4%, the flame retardant grade is V0, the heat resistance grade is H (heat resistance temperature is 180℃), and the dielectric loss factor is 0.57%.

[0073] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wrinkle-free ultra-thick mica coil, characterized by: The wrinkle-free ultra-thick mica coil comprises a phlogopite paper layer, a mica slurry solidified layer heat-pressed and compounded on the surface of the phlogopite paper, and a reinforcing mesh layer heat-pressed and compounded on the surface of the mica slurry solidified layer, wherein the thickness of the phlogopite mica paper layer is 0.075-0.16 mm, and the glue content of the phlogopite mica paper layer is 10-30 wt %; the thickness of the mica slurry solidified layer is 0.375-0.425 mm, and the glue content of the mica slurry solidified layer is 20-30 wt %; the thickness of the reinforcing mesh layer is 0.025-0.040 mm, and the reinforcing mesh layer is any one of a glass fiber mesh cloth, a carbon fiber mesh cloth, and an inorganic fiber / organic elastic fiber blended cloth; the total thickness of the wrinkle-free ultra-thick mica coil is 0.50-1.20 mm.

2. The wrinkle-free ultra-thick mica coil according to claim 1, characterized in that: The reinforcing mesh cloth layer is an inorganic fiber / organic elastic fiber blended cloth, the inorganic fiber in the inorganic fiber / organic elastic fiber blended cloth is any one of glass fiber filaments, carbon fiber filaments, basalt fiber filaments, and ceramic fiber filaments; the organic fiber in the inorganic fiber / organic elastic fiber blended cloth is any one of aramid fiber filaments, polyimide filaments, and polytetrafluoroethylene filaments.

3. The wrinkle-free ultra-thick mica coil according to claim 1, characterized in that: The density of the wrinkle-free ultra-thick mica coil is 2.0-2.5 g / cm 3 , electrical strength ≥35 kv / mm, thermal conductivity ≥0.10-0.30W / m*K, tensile strength ≥200MPa, elongation at break ≥5.0%, flame retardant grade V0.

4. An integrated production system for wrinkle-free ultra-thick mica coils according to claims 1-3, characterized in that: The mica paper unwinding roller (1), the guide roller group (2), the rolling composite roller group (3), the mica slurry mixing kettle (4), the first oven (5), the first hot pressing roller group (6), the reinforced mesh unwinding roller (60), the second oven (7), the second hot pressing roller group (70), the mica composite coil storage component (8), the laser cutting component (9), and the finished mica composite coil storage roller (10), wherein the mica paper unwinding roller (1) is loaded with phlogopite mica paper; the mica The mother slurry mixing kettle (4) inputs mica slurry to the rolling composite roller group (3), and the rolling composite roller group (3) hot-presses and solidifies the mica slurry on the surface of the phlogopite mica paper, and hot-presses and solidifies the mica slurry on the surface of the phlogopite mica paper to form a mica slurry solidified layer; the reinforcing mesh cloth unwinding roller (60) is loaded with a reinforcing mesh cloth layer; the reinforcing mesh cloth layer unwound by the reinforcing mesh cloth unwinding roller (60) is input to the first hot pressing roller group (6) and hot-pressed and composited with the phlogopite mica paper with the hot-pressed composite mica slurry solidified layer on the surface.

5. The integrated production system of wrinkle-free ultra-thick mica coil according to claim 4, characterized in that: The mica paper unwound by the mica paper unwinding roller (1) is transferred to the rolling composite roller group (3) through the guide roller group (2). At the same time, the mica slurry inputted from the mica slurry mixing kettle (4) is mixed and poured and placed on the rolling composite roller group (3). The rolling composite roller group (3) hot-presses and compounds the mica slurry on the surface of the mica paper to obtain a semi-finished mica composite coil A. The semi-finished mica composite coil A outputted from the rolling composite roller group (3) is inputted into the first oven (5) for drying and curing treatment to obtain a semi-finished mica composite coil B. The semi-finished mica composite coil B outputted from the first oven (5) is transferred to the first hot pressing roller group (6). At the same time, the reinforcing mesh unwound by the reinforcing mesh unwinding roller (60) is also inputted into the first hot pressing roller group (6). The reinforcing mesh is hot-pressed and compounded on the upper surface of the semi-finished mica composite coil B to obtain a semi-finished mica composite coil C. The semi-finished mica composite coil C outputted from the first hot pressing roller group (6) is inputted into the second oven (7) for drying and curing treatment. The semi-finished mica composite coil D is obtained by drying and curing; the semi-finished mica composite coil D output by the second oven (7) is input into the second hot pressing roller group (70) for secondary hot pressing treatment to obtain the semi-finished mica composite coil E; the semi-finished mica composite coil E output by the second hot pressing roller group (70) is temporarily stored in the mica composite coil storage component (8); the semi-finished mica composite coil output by the mica composite coil storage component (8) is marked as the semi-finished mica composite coil E'; the semi-finished mica composite coil E' is intermittently laser cut by the laser cutting component (9) and then stored in the finished mica composite coil storage roller (10); the semi-finished mica composite coil E' input into the laser cutting component (9) is in a stagnant state; during the laser cutting operation time of the laser cutting component (9), the semi-finished mica composite coil E input by the second hot pressing roller group (70) is temporarily stored in the mica composite coil storage component (8).

6. The integrated production system of wrinkle-free ultra-thick mica coil according to claim 5, characterized in that: The rolling composite roller group (3) comprises a first rolling composite roller (31), a second rolling composite roller (32), a third rolling composite roller (33) and a fourth rolling composite roller (34); the mica slurry outputted from the mica slurry mixing kettle (4) is fed between the first rolling composite roller (31) and the second rolling composite roller (32); under the hot pressing action of the first rolling composite roller (31) and the second rolling composite roller (32), the phlogopite mica paper is hot-pressed and composited with a semi-solid mica slurry solidified layer; the phlogopite mica paper with the semi-solid mica slurry solidified layer hot-pressed and composited on the surface is input between the third rolling composite roller (33) and the fourth rolling composite roller (34) for secondary hot pressing and curing to obtain a semi-finished mica composite coil A.

7. The integrated production system of wrinkle-free ultra-thick mica coil according to claim 6, characterized in that: The mica slurry mixing kettle (4) comprises a mixing kettle body (41), an anchor stirrer (42), a driving motor (43), a metering pump (44), and a discharge pipe (45); the top of the mixing kettle body (41) is respectively connected to a mica powder input pipe (411) and a binder input pipe (412); the driving motor (43) is fixedly connected to the top of the mixing kettle body (41); the output shaft of the driving motor (43) is fixedly connected to the anchor stirrer (42) via a coupling; the anchor stirrer (42) ) is located inside the stirring kettle body (41) and is used to mix mica and a binder to form a mica slurry; the input end of the metering pump (44) is connected to the bottom of the stirring kettle body (41) through a pipeline, and the output end of the metering pump (44) is connected to the feed end of the discharge pipe (45); the discharge end of the discharge pipe (45) is close to between the first rolling composite roller (31) and the second rolling composite roller (32), and the vertical projection of the discharge pipe (45) falls inside the vertical projection of the first rolling composite roller (31).

8. The integrated production system of wrinkle-free ultra-thick mica coil according to claim 7, characterized in that: The adhesive input into the stirring kettle body (41) through the adhesive input pipe (412) contains a photocurable monomer and a photoinitiator; the rolling composite roller group (3) further comprises an ultraviolet curing lamp group (45), the ultraviolet curing lamp group (45) being arranged between the second rolling composite roller (32) and the fourth rolling composite roller (34), the ultraviolet light generated by the ultraviolet curing lamp group (45) irradiating the surface of the semi-solid mica slurry solidified layer on the phlogopite mica by heat pressing and compounding; the phlogopite mica paper with the semi-solid mica slurry solidified layer on the surface of the first rolling composite roller (31) and the second rolling composite roller (32) is subjected to ultraviolet curing and shaping treatment, and the phlogopite mica paper with the semi-solid mica slurry solidified layer on the surface subjected to ultraviolet curing and shaping treatment by the ultraviolet curing lamp group (45) is input between the third rolling composite roller (33) and the fourth rolling composite roller (34) for secondary heat pressing and curing and shaping to obtain a semi-finished mica composite coil A.

9. The integrated production system of wrinkle-free ultra-thick mica coil according to claim 4, characterized in that: The reinforced mesh unrolled by the reinforced mesh unwinding roller (60) is soaked in heat-reactive organic silicone water; the roller surface temperature of the first hot pressing roller group (6) is 120-160°C; the drying temperature of the second oven (7) is 80-120°C, and the travel of the second oven (7) is 8-16m.

10. The integrated production system of wrinkle-free ultra-thick mica coil according to claim 5, characterized in that: The mica composite coil storage assembly (8) comprises a box body (81), an upper transmission roller group (82), and a lower transmission roller group (83); the upper transmission roller group (82) comprises a plurality of upper transmission rollers (821) spaced apart from each other, and the upper transmission rollers (821) are rotatably and fixedly connected to the box body (81); the central axes of the upper transmission rollers (821) are all located in the same plane; the lower transmission roller group (83) comprises a plurality of lower transmission rollers (831) spaced apart from each other; the box body (81) is provided with a slide groove (811), and the length direction of the slide groove (811) is perpendicular to the horizontal plane; the lower transmission roller (831) comprises a lower transmission roller body (8311) and a rotating rod (8312) coaxially fixedly connected to a lower transmission roller body (8311), the lower transmission roller body (8311) being located inside the box body (81); the rotating rod (8312) being slidably connected to a slide groove (811) of the box body (81); the rotating rod (8312) passing through the box body (81) and exposed outside the box body (81), the rotating rod (8312) located outside the box body (81) being fixedly connected to a cylinder (84); the cylinder (84) driving the lower transmission roller (831) to reciprocate along the slide groove (811) provided in the box body (81); the semi-finished mica composite coil E is wound between the upper transmission roller (821) and the lower transmission roller (831).

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