A calendering equipment and process for multifunctional silica gel composite material

Abstract

This invention discloses a calendering molding equipment and process for multifunctional silicone composite materials, belonging to the field of silicone processing technology. The equipment includes a five-roll calendering mechanism, a TPE roll-on texture mechanism, a cross-linking heating mechanism, a winding and laminating mechanism, and an auxiliary processing mechanism. By precisely controlling the roller speed, spacing, and temperature gradient, it achieves integrated molding of multilayer silicone, reinforcing materials, and functional films. The process employs segmented calendering, vacuum rubber mixing, and gradient cross-linking technologies, combined with treatment agent impregnation and double-sided adhesive lamination, to produce silicone composite materials with fire-retardant, thermally conductive, and wear-resistant functions. This invention solves the problems of traditional calendering equipment, such as limited product variety, low thickness accuracy, and insufficient functional integration. It is suitable for scenarios such as new energy vehicle battery pack protection and wire harness winding, improving product production efficiency and reliability.

Description

Technical Field

[0001] This invention relates to the field of silicone material processing technology, and in particular to a calendering molding equipment and process for multifunctional silicone composite materials, which is especially suitable for the production of fireproof and thermally conductive silicone products for new energy vehicles. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the functional requirements for silicone composite materials are becoming increasingly diversified. These materials not only require excellent insulation and high-temperature resistance but also need to integrate composite functions such as fire resistance, thermal conductivity, and wear resistance. Traditional silicone calendering equipment is mostly a three- or four-roller structure, which has the following drawbacks: First, the low precision of the roller adjustment leads to large thickness errors in the products, making it difficult to meet the production needs of ultra-thin, multi-layer composite products; second, the process is too simple to achieve integrated molding of silicone with glass fiber cloth and functional films, requiring multiple processes and resulting in low production efficiency; third, uneven control of the cross-linking heating temperature easily leads to incomplete or excessive cross-linking of the products; fourth, the recycling rate of residual materials is low, resulting in serious waste of the adhesive, and the uneven dispersion of functional additives (such as fire-retardant glass beads) affects the stability of product performance.

[0003] In existing technologies, such as Chinese patent CN201921568987.8, which discloses a silicone sheet calendering machine with a four-roll structure, although it can achieve basic calendering, it cannot meet the requirements of multi-layer composites and precise temperature control. Chinese patent CN202010876543.9 discloses a preparation process for fire-retardant silicone, but it does not involve structural optimization of the calendering equipment, and the product has limited functionality, making it difficult to adapt to the complex application scenarios of new energy vehicles. Therefore, developing a highly integrated, high-precision, and comprehensive calendering equipment and process is key to solving the pain points of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a calendering molding equipment and process for multifunctional silicone composite materials. Through the design of five-roll precision calendering, gradient crosslinking heating, and integrated bonding, it can achieve efficient and high-quality production of multifunctional silicone composite materials with fire resistance, thermal conductivity and other properties.

[0005] The present invention adopts the following technical solution: A calendering molding equipment for multifunctional silicone composite materials includes a five-roll calendering mechanism, a TPE feeding and cutting mechanism, a TPE roll forming mechanism, a crosslinking heating mechanism, a winding and bonding mechanism, and auxiliary devices. The five-roll calendering mechanism includes a first roller, a second roller, a third roller, a fourth roller, and a fifth roller arranged sequentially along the material conveying direction. The first to fourth rollers are each connected to an independent servo motor, and the fifth roller is driven by the fourth roller through gear meshing. The first, second, third, and fifth rollers are adjustable-pitch rollers, while the fourth roller is a fixed roller. The roller pitch of the first and second rollers is adjusted along the horizontal movement direction, and the roller pitch of the third and fifth rollers is adjusted along the vertical direction. A metal scraper is provided on one side of the fifth roller. A U-shaped bracket is provided at the discharge point of the five-roll calendering mechanism, and a support roller, a cutting wire, and a counterweight are provided on the U-shaped bracket. The TPE feeding and cutting mechanism includes a TPE feeding roller with a tension motor tensioning device, and three tensioning rollers are arranged in sequence behind the feeding roller; a width positioning cutting blade is provided above the TPE feeding roller and the first tensioning roller. The TPE upper coil texture mechanism is used for embossing the lower surface of the coil after calendering; The crosslinking heating mechanism includes at least 6 drying tunnels, with the temperature inside the drying tunnels increasing in a gradient along the material transport direction; the top of the drying tunnel is equipped with a U-shaped groove and heating pipes, and each drying tunnel is equipped with an independent temperature control system and exhaust pipe; the entrance of the drying tunnel is equipped with a TPE roll texture mechanism for placing calendered TPE rolls, and the required texture is formed on the silicone rolls by upper and lower rollers; the exit is equipped with a quality inspection workbench with a U-shaped buffer zone. The winding and laminating mechanism includes a winding roller and a tension roller. A PP film unwinding roller is provided above the tension roller, and cylinders and pressure display devices are arranged on both sides of the tension roller. The auxiliary mechanism includes two open mills and a vacuum machine. The first open mill is used for initial rubber mixing, the second open mill is used for secondary rubber mixing before calendering, and the vacuum machine is used for degassing the rubber compound.

[0006] The five-roll calendering mechanism employs a five-roll layout, with roll diameters and lengths adapted to products 1300-1400mm wide. Roller parallelism error is controlled within 0.02mm to ensure uniform sheet thickness. The first to fourth rolls are equipped with independent servo motors for precise speed adjustment. The fifth roll meshes with the fourth roll via gears to ensure synchronous transmission. The roll spacing mechanism utilizes precision lead screws and machining center-grade guide rails. The first roll's horizontal adjustment tangentially to the second roll; the second roll's lateral horizontal adjustment presses against the third roll; the third and fifth rolls' vertical adjustment; and the fourth roll is fixed. All spacing actions are driven by servo motors and include a current protection mechanism to prevent excessive pressure from damaging the equipment. The fifth roll is equipped with a metal scraper to prevent residual material from sticking to the roll and affecting product surface flatness.

[0007] The TPE feeding roller uses a tension motor tensioning device, which, together with three tensioning rollers, forms a stable tension control system to ensure the TPE film is laid flat. The width positioning cutter between the first and second rollers can precisely control the sheet width according to product requirements. The U-shaped bracket and counterweight wire at the discharge point can quickly remove edge excess material. The excess material can be recycled after secondary rubber mixing and vacuum degassing, improving material utilization.

[0008] Crosslinking heating mechanism: At least six drying tunnels employ a gradient temperature design, with the temperature gradually increasing from the inlet to the outlet, achieving segmented crosslinking of the silicone and avoiding product deformation or performance defects caused by sudden temperature changes. The bottom of the Teflon track within the drying tunnel is equipped with idler rollers, and the externally mounted bearings prevent high-temperature failure. The segmented, alternating high and low temperature structure ensures uniform stress on the composite material during transport, guaranteeing flatness. Each drying tunnel has independent temperature control and is equipped with an exhaust duct to promptly remove volatiles generated during the crosslinking process, improving product purity.

[0009] Winding and laminating mechanism: The five-roller winding structure forms a U-shaped buffer zone, effectively releasing the internal stress of the composite material. The tension roller controls the pressure through a cylinder, ensuring that the PP film adheres tightly to the silicone layer, forming double protection. The upper and lower winding rollers allow for winding without stopping the machine.

[0010] Auxiliary mechanisms: Two open mixing mills are used for initial rubber mixing and secondary rubber mixing before calendering, respectively. Combined with vacuum degassing process, this ensures that the rubber compound is mixed evenly and without bubbles, and that functional additives are dispersed stably, thereby improving the consistency of product performance.

[0011] Preferably, all the rubber rollers are equipped with a water-cooling device. The rubber rollers have built-in water-cooling channels to control the roller surface temperature in real time.

[0012] Preferably, the inner track of the drying tunnel is made of Teflon material, and a bottom roller is provided, with the roller bearing located outside the drying tunnel.

[0013] Preferably, the winding and bonding mechanism includes five winding rollers, with the first four winding rollers arranged within a range of ≥100mm above and below and left and right along the horizontal line, and the tension roller forming a U-shaped groove structure with a drop of ≥200mm with the first four winding rollers.

[0014] Preferably, the length of the rubber roller is 1600mm, which is suitable for solid silicone products with a width of 1300-1400mm; the parallelism error of the rubber roller is ≤0.02mm, and the surface has a mirror structure.

[0015] Preferably, the second tensioning roller is located 300mm to the right and 200-250mm up from the feed roller, and the third tensioning roller is located 300mm to the right from the second tensioning roller.

[0016] A multifunctional silicone composite material calendering process based on the above-mentioned equipment includes the following steps: S1. Rubber compound preparation: Flame-retardant silicone rubber is prepared using a precipitation method. Component A (3-5g / 10kg) and component B (containing crosslinking agent and inhibitor) are added according to the formula. Component A is a platinum complex, and component B consists of hydrogen-containing silicone oil and ethynylcyclohexanol. 40kg of rubber is mixed in one pass using a first open mill, divided into two 20kg portions, and vacuum-sealed for 15 minutes. The degassed rubber is then transferred to a second open mill and milled 5-7 times before calendering. If the storage time exceeds 3 hours, 20-30g / 20kg of component B is added. The remaining rubber after cutting is milled 2-3 times, vacuum-sealed for 15 minutes, and then milled 5-7 times for reuse. S2. First Calendering: The TPE film is laid on the surface of the fifth roller through the TPE feeding roller and tension roller. The roller spacing of the five-roll calendering mechanism is adjusted as follows: 5mm between the first and second rollers, 3mm between the second and third rollers, 1.4mm between the third and fourth rollers, and 1.3mm between the fourth and fifth rollers. The roller speed is set as follows: 7-8 rpm for the first and second rollers, 12 rpm for the third and fourth rollers, and the fifth roller meshes with the fourth roller. The rubber material is added between the first and second rollers, and the composite preform of silicone layer and TPE film is formed by five-roll calendering. The width is positioned by a cutting knife, and the excess material is cut off. S3. Crosslinking heating: The composite billet enters the drying tunnel through the tension release roller and undergoes a crosslinking reaction at a gradient temperature of 100℃→110℃→120℃→170℃→180℃→190℃. During the conveyor belt process, it is supported by idler rollers, and the alternating high and low structure of the drying tunnel segments ensures the flatness of the billet. S4. Quality Inspection and Rewinding: After cross-linking, the composite material releases tension through a U-shaped buffer zone. Check for bubbles and lumps every 5-10 minutes on the quality inspection workbench. Cut off any unqualified parts in time. Qualified materials are rewound by the rewinding roller. During the rewinding process, the tension roller adheres the PP film to the other side of the silicone layer, forming a three-layer structure of TPE film-silicone-PP film. S5. Post-processing: According to product requirements, the wound composite material is impregnated in a treatment agent tank, dried in an oven, and then bonded with 3M 9448A double-sided adhesive to form a multifunctional silicone composite material.

[0017] In the rubber compound preparation stage: Component A and component B containing inhibitors are added strictly according to the formula ratio. The problems of uneven mixing and residual air bubbles are solved through a two-stage mixing process and vacuum degassing. For rubber compounds that have been stored for too long, an appropriate amount of component B is added to inhibit excessive cross-linking and ensure stable processing performance. The waste material recycling process reduces material waste and lowers production costs.

[0018] First calendering stage: By precisely adjusting the five-roller spacing and speed, the stacking height and width of the rubber compound between the third and fourth rollers are controlled to ensure complete TPE film coverage, while maintaining the silicone layer thickness accuracy between 1.35-1.4mm. Width positioning and excess material cutting are carried out simultaneously to improve production efficiency and ensure neat product edges.

[0019] Crosslinking heating stage: The gradient temperature design allows the silicone to gradually transition from initial crosslinking to complete crosslinking, avoiding performance degradation caused by excessively high local temperatures. The transport structure design within the drying tunnel ensures that the composite material is not subjected to additional stress during the crosslinking process, maintaining its flatness. The fume extraction system removes volatiles, improving the product's environmental performance.

[0020] Quality inspection and winding stage: Regular quality inspection promptly detects and addresses defects such as bubbles and lumps; U-shaped buffer zone releases tension; PP film is laminated to form protection, preventing product damage during winding and ensuring finished product quality.

[0021] Post-processing stage: The treatment agent wets and activates the silicone surface to improve the adhesion of the double-sided adhesive. Slitting and die-cutting processes enable the product to adapt to different application scenarios, such as the protection of new energy vehicle battery packs and wire harness winding, thus realizing the multi-functionality of the product.

[0022] Preferably, in step S2, the width of the TPE film is adjusted according to the thickness and width of the silicone product.

[0023] Preferably, in step S5, the treatment agent is a mixed reagent for activating the silicone surface layer. After the impregnated composite material is dried in a 1.5-meter drying tunnel, it is simultaneously wound up with the release paper of the double-sided adhesive to achieve bonding.

[0024] Preferably, the multifunctional silicone composite material includes fire-retardant silicone tape, thermally conductive silicone block, and silicone leather. The fire-retardant silicone tape has a structure of a bottom 0.3mm ceramic silicone layer, a middle 0.1mm glass fiber cloth, and an upper 0.3mm self-adhesive silicone, ceramic silicone, or double 25 ordinary silicone. Glass beads are added to the silicone layer, and when burning, the glass beads pop out to achieve the fire extinguishing function.

[0025] The beneficial effects of this invention are: (1) Using five-roll precision calendering and servo control technology, the product thickness accuracy is controlled within ±0.05mm, meeting the production needs of ultra-thin, multi-layer composite products; (2) Integrating multiple processes such as calendering, cross-linking, bonding, and cutting, realizing integrated production, and improving production efficiency by more than 30%; (3) Gradient cross-linking heating and waste material recycling process reduces energy consumption and material waste, and reduces production costs by 20%; (4) The product can integrate composite functions such as fireproof, heat conduction, and wear resistance. The glass beads added to the silicone layer pop out when burning to extinguish the fire, and the glass fiber cloth enhances the structural strength, making it suitable for high-end application scenarios such as new energy vehicles; (5) The equipment has strong compatibility and can produce a variety of products such as fireproof silicone cloth, heat conduction silicone blocks, and silicone leather, adapting to different customer needs and having a wide range of applications. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of a five-roll calendering mechanism and a TPE feeding and cutting mechanism in this invention; Figure 3 This is a schematic diagram of the internal structure of the five-roll calendering mechanism and the TPE feeding and cutting mechanism in this invention; Figure 4 This is a schematic diagram of one structure of the winding and bonding mechanism in this invention; Figure 5 This is a schematic diagram of one structure of the TPE roll material texture mechanism in this invention; In the diagram: 1. Five-roll calendering mechanism; 2. TPE unloading and cutting mechanism; 3. Crosslinking heating mechanism; 4. Rewinding and laminating mechanism; 1.1 First rubber roller; 1.2 Second rubber roller; 1.3 Third rubber roller; 1.4 Fourth rubber roller; 1.5 Fifth rubber roller; 2.1 TPE unloading roller; 2.2 Cutting knife; 2.3 First tension roller; 2.4 Second tension roller; 2.5 Third tension roller; 2.6 U-shaped bracket; 4.1 Rewinding roller; 4.2 PP film unwinding roller; 4.3 Tension roller; 5. TPE roll forming mechanism; 6. Quality inspection workbench. Detailed Implementation

[0027] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example: Figures 1-5 As shown, a multifunctional silicone composite material calendering molding equipment includes a five-roll calendering mechanism 1, a TPE feeding and cutting mechanism 2, a crosslinking heating mechanism 3, a winding and bonding mechanism 4, a TPE roll material texture mechanism 5, and auxiliary devices. The five-roll calendering mechanism includes a first roller 1.1, a second roller 1.2, a third roller 1.3, a fourth roller 1.4, and a fifth roller 1.5 arranged sequentially along the material conveying direction. The first to fourth rollers are each connected to an independent servo motor, and the fifth roller is driven by the fourth roller through gear meshing. The first, second, third, and fifth rollers are adjustable-pitch rollers, while the fourth roller is a fixed roller. The roller pitch of the first and second rollers is adjusted along the horizontal movement direction, and the roller pitch of the third and fifth rollers is adjusted along the vertical direction. A metal scraper is provided on one side of the fifth roller. A U-shaped bracket 2.5 is provided at the material outlet of the five-roll calendering mechanism, and the bracket is provided with a support roller, a cutting wire, and a counterweight. The TPE feeding and cutting mechanism includes a TPE feeding roller 2.1 with a tension motor tensioning device, and three tension rollers are arranged in sequence behind the feeding roller: a first tension roller 2.3, a second tension roller 2.4, and a third tension roller 2.5. A width positioning cutting blade 2.2 is provided above the TPE feeding roller 2.1 and the first tension roller 2.3. The crosslinking heating mechanism includes six drying tunnels, with the temperatures within the tunnels set sequentially along the material transport direction to 100℃, 110℃, 120℃, 170℃, 180℃, and 190℃. The top of each drying tunnel is equipped with a U-shaped groove and heating pipes. Each drying tunnel section is equipped with an independent temperature control system and exhaust pipe. A TPE roll-on texture mechanism is located at the tunnel entrance for placing calendered TPE rolls. Upper and lower rollers form the desired texture on the silicone roll. A quality inspection workbench with a U-shaped buffer zone is located at the exit. The winding and laminating mechanism includes a winding roller 4.1 and a tension roller 4.3. A PP film unwinding roller 4.2 is provided above the tension roller, and cylinders and pressure display devices are arranged on both sides of the tension roller. The auxiliary mechanism includes two open mills and a vacuum machine. The first open mill is used for initial rubber mixing, the second open mill is used for secondary rubber mixing before calendering, and the vacuum machine is used for degassing the rubber compound.

[0028] All rubber rollers are equipped with water cooling devices. The tracks inside the drying tunnel are made of Teflon material, and there are idler rollers at the bottom, with the idler roller bearings located outside the drying tunnel.

[0029] The winding and bonding mechanism includes five winding rollers. The first four winding rollers are arranged within a range of ≥100mm above and below and left and right along the horizontal line. The tension roller and the first four winding rollers form a U-shaped groove structure with a drop of ≥200mm.

[0030] The roller is 1600mm long and is compatible with solid silicone products with a width of 1300-1400mm; the parallelism error of the roller is ≤0.02mm, and the surface has a mirror finish.

[0031] The second tensioning roller is located 300mm to the right and 200-250mm up from the feed roller, and the third tensioning roller is located 300mm to the right from the second tensioning roller.

[0032] A multifunctional silicone composite material calendering process based on the above-mentioned equipment includes the following steps: S1. Rubber compound preparation: Flame-retardant silicone rubber is prepared using a precipitation method. Component A (3-5g / 10kg) and component B (containing crosslinking agent and inhibitor) are added according to the formula. Component A is a platinum complex, and component B consists of hydrogen-containing silicone oil and ethynylcyclohexanol. 40kg of rubber is mixed in one pass using a first open mill, divided into two 20kg portions, and vacuum-sealed for 15 minutes. The degassed rubber is then transferred to a second open mill and milled 5-7 times before calendering. If the storage time exceeds 3 hours, 20-30g / 20kg of component B is added. The remaining rubber after cutting is milled 2-3 times, vacuum-sealed for 15 minutes, and then milled 5-7 times for reuse. S2. First Calendering: The TPE film is laid on the surface of the fifth roller through the TPE feeding roller and tensioning roller. The roller spacing of the five-roll calendering mechanism is adjusted as follows: 5mm between the first and second rollers, 3mm between the second and third rollers, 1.4mm between the third and fourth rollers, and 1.3mm between the fourth and fifth rollers. The roller speed is set as follows: 7-8 rpm for the first and second rollers, 12 rpm for the third and fourth rollers, and the fifth roller meshes with the fourth roller. The rubber material is added between the first and second rollers, and the composite preform of silicone layer and TPE film is formed by five-roll calendering. The width is positioned by a cutting knife, and the excess material is removed by cutting wire. S3. Crosslinking heating: The composite billet enters the drying tunnel through the tension release roller and undergoes a crosslinking reaction at a gradient temperature of 100℃→110℃→120℃→170℃→180℃→190℃. During the conveyor belt process, it is supported by idler rollers, and the alternating high and low structure of the drying tunnel segments ensures the flatness of the billet. S4. Quality Inspection and Rewinding: After cross-linking, the composite material releases tension through a U-shaped buffer zone. Check for bubbles and lumps every 5-10 minutes on the quality inspection workbench. Cut off any unqualified parts in time. Qualified materials are rewound by the rewinding roller. During the rewinding process, the tension roller adheres the PP film to the other side of the silicone layer, forming a three-layer structure of TPE film-silicone-PP film. S5. Post-processing: According to product requirements, the wound composite material is impregnated in a treatment agent tank, dried in an oven, and then bonded with 3M 9448A double-sided adhesive to form a multifunctional silicone composite material.

[0033] In step S2, the width of the TPE film is adjusted according to the thickness and width of the silicone product.

[0034] In step S5, the treatment agent is a mixed reagent used for activating the silicone surface. After the impregnated composite material is dried in a 1.5-meter drying tunnel, it is simultaneously wound up with the release paper of the double-sided adhesive to achieve bonding.

[0035] The multifunctional silicone composite material includes fire-retardant silicone tape, thermally conductive silicone blocks, and silicone leather. The fire-retardant silicone tape has a structure of a bottom 0.3mm ceramic silicone layer, a middle 0.1mm glass fiber cloth, and a top 0.3mm self-adhesive silicone, ceramic silicone, or double 25 ordinary silicone. Glass beads are added to the silicone layer. When burning, the glass beads pop out to achieve the fire extinguishing function.

[0036] Example 1: Production of fire-retardant silicone tape 1. Rubber compound preparation: 10 kg of flame-retardant silicone rubber was prepared by precipitation method. 4 g of component A and 90 g of component B containing crosslinking agent and inhibitor were added. 40 kg of rubber was prepared by mixing on the first open mill. The mixture was then divided into two 20 kg portions and vacuum degassed for 15 minutes. The mixture was then transferred to the second open mill and mixed 6 times. 25 g of component B was added as a supplement. The mixture was then set aside for later use.

[0037] 2. First calendering: A 0.05mm thick TPE film is laid out through the feeding roller and tension roller. The five-roller spacing is adjusted as follows: the first and second rollers are 5mm apart, the second and third rollers are 3mm apart, the third and fourth rollers are 1.4mm apart, and the fourth and fifth rollers are 1.3mm apart. The rotation speed is set as follows: the first and second rollers are 7.5 rpm, and the third and fourth rollers are 12 rpm. The rubber compound is added to the calender, and a 0.1mm glass fiber cloth is laid out at the same time. The calendering forms a composite blank with a bottom silicone layer and glass fiber cloth. The width is set at 570mm. The excess material is cut and recycled.

[0038] 3. Crosslinking heating: The composite preform enters the drying tunnel and crosslinks at a temperature of 100℃→110℃→120℃→170℃→180℃→190℃, with a transmission speed of 3m / min.

[0039] 4. Secondary calendering and lamination: The cross-linked composite preform is fed back into the calender to calender a 0.3mm self-adhesive silicone layer. After being impregnated with a treatment agent and dried in the drying tunnel, 3M 9448A double-sided adhesive is laminated on it. The preform is then slit and rolled up to obtain the finished fire-retardant silicone tape.

[0040] Example 2: Production of thermally conductive silicone blocks 1. Rubber compound preparation: 20% thermally conductive filler was added to the precipitated flame-retardant silicone rubber, and the rubber compound was prepared according to the formulation and rubber mixing process of Example 1.

[0041] 2. Calendering: Adjust the five-roll gap to 2.0mm, set the speed to 7 rpm for the first and second rolls and 11 rpm for the third and fourth rolls, calender to form a thermally conductive silicone blank, which requires TPE film to be laid.

[0042] 3. Crosslinking heating: The oven temperature is set to 100℃→115℃→125℃→165℃→175℃→185℃, and the conveying speed is 0.4m / min.

[0043] 4. Post-processing: The cross-linked silicone block is processed into the required size by dynamic punching process to obtain the finished thermally conductive silicone block.

[0044] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A calendering and molding equipment for multifunctional silicone composite materials, characterized in that, It includes a five-roll calendering mechanism, a TPE feeding and cutting mechanism, a TPE roll forming mechanism, a cross-linking heating mechanism, a winding and laminating mechanism, and auxiliary devices; The five-roll calendering mechanism includes a first roller, a second roller, a third roller, a fourth roller, and a fifth roller arranged sequentially along the material conveying direction. The first to fourth rollers are each connected to an independent servo motor, and the fifth roller is driven by the fourth roller through gear meshing. The first, second, third, and fifth rollers are adjustable-pitch rollers, while the fourth roller is a fixed roller. The roller pitch of the first and second rollers is adjusted along the horizontal movement direction, and the roller pitch of the third and fifth rollers is adjusted along the vertical direction. A metal scraper is provided on one side of the fifth roller. A U-shaped bracket is provided at the discharge point of the five-roll calendering mechanism, and a support roller, a cutting wire, and a counterweight are provided on the U-shaped bracket. The TPE feeding and cutting mechanism includes a TPE feeding roller with a tension motor tensioning device, and three tensioning rollers are arranged in sequence behind the feeding roller; a width positioning cutting blade is provided above the TPE feeding roller and the first tensioning roller. The crosslinking heating mechanism includes at least 6 drying tunnels, with the temperature inside the drying tunnels increasing in a gradient along the material transport direction; the top of the drying tunnel is equipped with a U-shaped groove and heating pipes, and each drying tunnel is equipped with an independent temperature control system and exhaust pipe; the entrance of the drying tunnel is equipped with a TPE roll texture mechanism for placing calendered TPE rolls, and the required texture is formed on the silicone rolls by upper and lower rollers; the exit is equipped with a quality inspection workbench with a U-shaped buffer zone. The winding and laminating mechanism includes a winding roller and a tension roller. A PP film unwinding roller is provided above the tension roller, and cylinders and pressure display devices are arranged on both sides of the tension roller. The auxiliary mechanism includes two open mills and a vacuum machine. The first open mill is used for initial rubber mixing, the second open mill is used for secondary rubber mixing before calendering, and the vacuum machine is used for degassing the rubber compound.

2. The calendering equipment for a multifunctional silicone composite material according to claim 1, characterized in that, All the rubber rollers are equipped with water cooling devices.

3. The calendering equipment for a multifunctional silicone composite material according to claim 1, characterized in that, The inner track of the drying tunnel is made of Teflon material, and there are idlers at the bottom, with the idler bearings located outside the drying tunnel.

4. The calendering equipment for a multifunctional silicone composite material according to claim 1, characterized in that, The winding and bonding mechanism includes five winding rollers. The first four winding rollers are arranged within a range of ≥100mm above and below and left and right along the horizontal line. The tension roller and the first four winding rollers form a U-shaped groove structure with a drop of ≥200mm.

5. The calendering equipment for a multifunctional silicone composite material according to claim 1, characterized in that, The length of the rubber roller is 1600mm, which is suitable for solid silicone products with a width of 1300-1400mm; the parallelism error of the rubber roller is ≤0.02mm, and the surface has a mirror structure.

6. The calendering equipment for a multifunctional silicone composite material according to claim 1, characterized in that, The second tensioning roller is located 300mm to the right and 200-250mm up from the feed roller, and the third tensioning roller is located 300mm to the right from the second tensioning roller.

7. A multifunctional silicone composite material calendering process based on the equipment described in claim 1, characterized in that, Includes the following steps: S1. Rubber compound preparation: Flame-retardant silicone rubber is prepared using a precipitation method. Component A (3-5g / 10kg) and component B (containing crosslinking agent and inhibitor) are added according to the formula. Component A is a platinum complex, and component B consists of hydrogen-containing silicone oil and ethynylcyclohexanol. 40kg of rubber is mixed in one pass using a first open mill, divided into two 20kg portions, and vacuum-sealed for 15 minutes. The degassed rubber is then transferred to a second open mill and milled 5-7 times before calendering. If the storage time exceeds 3 hours, 20-30g / 20kg of component B is added. The remaining rubber after cutting is milled 2-3 times, vacuum-sealed for 15 minutes, and then milled 5-7 times for reuse. S2, First Calendering: The TPE film is laid on the surface of the fifth roller through the TPE feeding roller and tension roller. The roller spacing of the five-roll calendering mechanism is adjusted as follows: 5mm between the first and second rollers, 3mm between the second and third rollers, 1.4mm between the third and fourth rollers, and 1.3mm between the fourth and fifth rollers. The roller speed is set as follows: 7-8 rpm for the first and second rollers, 12 rpm for the third and fourth rollers, and the fifth roller meshes with the fourth roller. The rubber material is added between the first and second rollers, and the composite blank of the silicone layer and TPE film is formed by five-roll calendering. The width is positioned by the cutting shears, and the excess material is cut off. S3. Crosslinking heating: The composite billet enters the drying tunnel through the tension release roller and undergoes a crosslinking reaction at a gradient temperature of 100℃→110℃→120℃→170℃→180℃→190℃. During the conveyor belt process, it is supported by idler rollers, and the alternating high and low structure of the drying tunnel segments ensures the flatness of the billet. S4. Quality Inspection and Rewinding: After cross-linking, the composite material releases tension through a U-shaped buffer zone. Check for bubbles and lumps every 5-10 minutes on the quality inspection workbench. Cut off any unqualified parts in time. Qualified materials are rewound by the rewinding roller. During the rewinding process, the tension roller adheres the PP film to the other side of the silicone layer, forming a three-layer structure of TPE film-silicone-PP film. S5. Post-processing: According to product requirements, the wound composite material is impregnated in a treatment agent tank, dried in an oven, and then bonded with 3M 9448A double-sided adhesive to form a multifunctional silicone composite material.

8. The calendering process for the multifunctional silicone composite material according to claim 7, characterized in that, In step S2, the width of the TPE film is adjusted according to the thickness and width of the silicone product.

9. The calendering process for multifunctional silicone composite materials according to claim 7, characterized in that, In step S5, the treatment agent is a mixed reagent used for activating the silicone surface. After the impregnated composite material is dried in a 1.5-meter drying tunnel, it is simultaneously wound up with the release paper of the double-sided adhesive to achieve bonding.

10. The calendering process for the multifunctional silicone composite material according to claim 7, characterized in that, The multifunctional silicone composite material includes fire-retardant silicone tape, thermally conductive silicone blocks, and silicone leather. The fire-retardant silicone tape has a structure of a bottom 0.3mm ceramic silicone layer, a middle 0.1mm glass fiber cloth, and an upper 0.3mm self-adhesive silicone, ceramic silicone, or double 25 ordinary silicone. Glass beads are added to the silicone layer. When burning, the glass beads pop out to achieve the fire extinguishing function.

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