Winding forming production line and production method for fiber-reinforced rubber-based revolving body

Abstract

The invention discloses a fiber-reinforced rubber-based rotary body winding forming production line and a production method. The production line comprises preheating equipment, conveying equipment, rubber extrusion equipment, a diameter measuring instrument, winding equipment, depoling equipment, girdling equipment and a conveyor driving system, the conveyor driving system is composed of a core conveying unit, first supporting assemblies and a second supporting assembly, the first supporting assemblies are connected to the two sides of the surface of the core conveying unit, and the second supporting assembly is connected to the position, close to the middle, of the surface of the core conveying unit. According to the winding forming production line and production method for the fiber-reinforced rubber-based rotary body, through the integrated production line design, multiple traditional discrete procedures are integrated into a continuous closed-loop process, the production efficiency and the equipment space utilization rate are remarkably improved, the raw material loss and the mold maintenance cost are greatly reduced in combination with the recycling of the core rod, and the production cost is reduced. The problems of low efficiency and serious resource waste of the traditional process are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of composite material reinforced structure manufacturing, in particular to a fiber reinforced rubber-based rotating body winding molding production line and a production method. Background Art

[0002] The production process for fiber-reinforced rotary parts directly impacts product reliability and lifespan. Traditional, segmented production (spinning, dipping, calendering, cutting, splicing, and vulcanization) presents two major challenges: manual transfer between processes leads to low efficiency, and cutting requires large overlap areas, resulting in low material utilization and high waste. For example, rubber-based cord fabric requires nylon / polyester fibers to be spun, dipped, and laminated before manual cutting and splicing, highlighting systemic flaws in the process.

[0003] Process discretization can also easily lead to quality consistency issues. The lack of precise positioning in manual splicing can easily lead to inaccurate cord arrangement angles and uneven adhesive layer thickness. Research has shown that such deviations directly weaken the mechanical properties of the product—cord angle deviations reduce hoop load-bearing capacity, while uneven adhesive layer thickness can cause interface defects during the vulcanization stage. Furthermore, traditional calendering equipment, limited by its mechanical design, can only achieve fixed-angle cord arrangement patterns. This makes it difficult to meet the requirements of variable-section rotating bodies for optimizing the gradual change in cord winding angle, hindering the development of high-performance products.

[0004] Upgrading existing equipment faces multiple technical challenges. The calender tension control system generally has insufficient precision, making it difficult to control the uniformity of cord distribution. Although automated splicing equipment can improve efficiency, its high-precision positioning requirements lead to a surge in equipment costs, and splicing misalignment defects are prone to occur during dynamic operations. In the existing technical system, when the calendering equipment line speed is increased to 20m / min, the tension fluctuation range exceeds ±15%, which creates a technical conflict with the winding angle control accuracy requirement of ±0.5°. These problems make it difficult for existing production lines to take into account both the high-precision winding requirements of lightweight components for new energy vehicles and the low-cost large-scale production requirements of the industrial field.

[0005] Current technological improvements in the industry focus on the development of continuous production models, such as the integrated dipping-calendering production line. Although this can shorten the process cycle, problems such as uneven cord impregnation and tension instability are prone to occur under high-speed operation. In summary, the existing technology system has not yet broken through the technical contradiction between "process discreteness leading to limited efficiency" and "insufficient precision leading to performance degradation". Especially in the field of fiber-reinforced rotating bodies, how to build a production line that takes into account efficient continuous production, precise process control and low-cost operation, and realize the automation of the entire process from substrate molding, reinforcement layer coating to finished product cutting has become a core issue that needs to be solved urgently. Summary of the Invention

[0006] Based on this, it is necessary to provide a fiber-reinforced rubber-based rotating body winding molding production line and production method to address the above technical problems, which can be combined with the recycling of core rods to greatly reduce raw material loss and mold maintenance costs, and solve the problems of low efficiency and serious waste of resources in traditional processes.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: A fiber-reinforced rubber-based rotating body winding molding production line includes a preheating device, a conveying device, a rubber extrusion device, a diameter gauge, a winding device, a core-removing device, a ring-cutting device and a conveyor drive system. The conveyor drive system is composed of the following components: a core conveying unit, a first support component and a second support component, the first support component is connected to both sides of the surface of the core conveying unit, and the second support component is connected to the surface of the core conveying unit near the middle.

[0008] As a preferred embodiment of the fiber-reinforced rubber-based rotary body winding molding production line provided by the present invention, a melt conveying area is provided on the left side of the interior of the flow channel, a melt conversion area is provided at the middle end of the interior of the flow channel, a solid conveying area is provided on the right side of the interior of the flow channel, and a feeding area is provided on the right side of the top of the flow channel.

[0009] As a preferred embodiment of the fiber-reinforced rubber-based rotary body winding molding production line provided by the present invention, it also includes a die feed port, and an extrusion port is provided on the left side inside the die feed port.

[0010] As a preferred embodiment of the fiber-reinforced rubber-based rotary body winding molding production line provided by the present invention, it also includes a placement seat, a light source and an emitting lens, the light source is fixedly connected to the top left side of the placement seat, the emitting lens is fixedly connected to the top left side of the placement seat near the middle, a core rod placement rack is provided on the top of the placement seat, the top of the core rod placement rack is plugged with the measured core rod, a receiving lens is provided on the top right side of the placement seat near the middle, and an aperture is provided on the top right side of the placement seat.

[0011] As a preferred embodiment of the fiber-reinforced rubber-based rotary body winding molding production line provided by the present invention, a winding unit is provided on the top of the placement seat, and an angle fixing unit is provided on the top of the placement seat.

[0012] A production method for a fiber-reinforced rubber-based rotating body winding molding production line includes the following steps: S1, pre-treating a core rod; The core rod serves as the core carrier throughout the entire process. The material is mold steel, the surface is sandblasted, and the sandblasting roughness is controlled in the range of 1.6-3.2.

[0013] The surface of the core rod is coated with polytetrafluoroethylene anti-stick coating, and a 10-20 gradient coating is formed by electrostatic spraying process. After the coating is sintered and cured at 380℃, the surface friction coefficient is ≤0.12 and can withstand ≥500 demolding cycles.

[0014] Before the core rod enters the production line, a special hose release agent is sprayed on it to improve the subsequent demoulding efficiency by forming an isolation film on the surface of the core rod, while protecting the core rod and improving the surface quality of the inner wall of the hose.

[0015] The core rod first enters the infrared-microwave composite preheating equipment, where the infrared band is responsible for surface heating and the microwave realizes core rod body heating. The internal preheating time is 30-60 seconds. The core rod surface temperature is adjusted to 60-120℃ according to the type of rubber compound, which increases the initial adhesion of the rubber compound by 40%-60%.

[0016] S2, winding and fixing process; The first-stage winding equipment consists of two parts: the winding unit and the angle fixing unit.

[0017] The winding unit is responsible for winding the fibers on the core rod according to the angle and density requirements of the product, with the extrusion speed as the basic speed. After the control system reads the speed of the extrusion equipment, it changes the winding angle by adjusting the circumferential speed of the spindle.

[0018] The winding angle can be adjusted in real time without interrupting the operation of the equipment, thereby achieving a variable angle effect where different areas on the same mandrel have different winding angles.

[0019] The winding angle formula is: ,in is the winding angle, is the peripheral speed of the spindle, is the core rod radius, is the traction speed.

[0020] The angle-fixing unit's tension pay-off system uses an external auxiliary wire to lock the cord arrangement angle, thereby keeping the fiber angle on the mandrel unchanged. Before entering the next extrusion station, the auxiliary machine's take-up system accurately retracts the auxiliary wire to avoid structural interference.

[0021] S3, subsequent processing; The demoulding stage uses water-assisted separation technology. The core-removing equipment injects warm water into the gap between the core rod and the product, and uses the rubber shrinkage characteristics to achieve lossless demoulding, ensuring the smoothness of the product's inner wall.

[0022] The circular cutting equipment uses a fiber laser cutting head to avoid cord damage caused by traditional saws. It moves synchronously along the core rod axis (speed 1-5m / min) and cuts according to the required length of the product.

[0023] After demoulding, the core rod enters the high-pressure water jet cleaning station with a pressure of 5-10MPa and a rotating brush of 200-400r / min to remove residual rubber within 30 seconds.

[0024] After cleaning, the core rods are dried by infrared and tested for surface cracks by eddy current flaw detector, and core rods with surface damage exceeding 0.2mm are automatically rejected.

[0025] As a preferred embodiment of the production method of the fiber-reinforced rubber-based rotating body winding molding production line provided by the present invention, in step S3, a single core rod can be reused ≥ 500 times, and the anti-stick coating is re-coated every 50 cycles.

[0026] As a preferred embodiment of the production method of the fiber-reinforced rubber-based rotating body winding molding production line provided by the present invention, in step S2, the winding speed of the auxiliary wire of the angle fixing unit is coordinated with the winding unit.

[0027] The operating parameters of the second-stage rubber extrusion equipment are consistent with those of the first-stage rubber extrusion equipment.

[0028] The second-stage winding equipment wraps the cord at a spiral angle symmetrical to that of the first cord layer, so that the upper and lower cord layers form a cross-mesh shear-resistant structure. The operating parameters of the third-stage rubber extrusion equipment are consistent with those of the first-stage rubber extrusion equipment.

[0029] As a preferred embodiment of the production method of the fiber-reinforced rubber-based rotary body winding molding production line provided by the present invention, in step S1, the preheated core rod is sent to the extrusion station via a conveying device, and the first-stage rubber extrusion equipment adopts a two-stage screw extruder equipped with a cross-rotating die head, the die head flow channel is designed as a tapered spiral structure, and a built-in pressure compensation valve; The diameter gauge uses a 630nm wavelength semiconductor laser and a double telecentric lens, combined with a linear array CCD sensor and sub-pixel interpolation algorithm, with a measurement accuracy of ±0.01mm; Rubber extrusion equipment can dynamically optimize extrusion process parameters: when the diameter gauge detects that the thickness deviation of the base rubber layer exceeds 0.05mm, it will feed the data back to the rubber extrusion equipment in real time, and the control system will automatically adjust the screw speed to ensure that the rubber layer thickness meets the standard.

[0030] In addition, the fiber-reinforced rubber-based rotary body winding molding production line adopts a modular design, and preheating equipment, rubber extrusion equipment, winding equipment, diameter gauge, core-removing equipment, and ring-cutting equipment are integrated along the processing direction. It operates in sequence according to the closed-loop process of "preheating equipment → conveying equipment → first-level rubber extrusion equipment → diameter gauge → conveying equipment → first-level winding equipment → conveying equipment → second-level rubber extrusion equipment → diameter gauge → conveying equipment → second-level winding equipment → conveying equipment → third-level rubber extrusion equipment → diameter gauge → conveying equipment → core-removing equipment → ring-cutting equipment". Through the core rod life cycle management system, the recycling of mold resources and the dynamic coupling of multi-process process parameters are realized. In terms of process design, dynamic winding angle control technology is introduced. Through the cooperation of multi-axis collaborative robotic arms and high-precision tension control systems, the cord arrangement angle and density are adjusted in real time to meet the gradient winding requirements of variable-section rotary bodies. At the same time, the gradient glue layer composite process ensures uniform distribution of glue layer thickness through multi-layer extrusion and precise diameter measurement feedback, effectively improving the interface bonding strength between rubber and fiber.

[0031] Compared with the prior art, the present invention has the following beneficial effects: The fiber-reinforced rubber-based rotating body winding molding production line and production method provided by the present invention, through an integrated production line design, integrates traditional multiple discrete processes into a continuous closed-loop process, significantly improving production efficiency and equipment space utilization. Combined with the recycling of core rods, it greatly reduces raw material loss and mold maintenance costs, solving the problems of low efficiency and serious waste of resources in traditional processes.

[0032] The fiber-reinforced rubber-based rotating body winding molding production line and production method provided by the present invention adopt a collaborative control method to ensure the precise and stable fiber winding angle. At the same time, the multi-layer composite extrusion process is used to achieve uniform control of the thickness of the rubber layer, effectively improving the consistency of the product's mechanical properties and interface bonding strength, and meeting the stringent requirements for structural reliability under complex working conditions.

[0033] The fiber-reinforced rubber-based rotating body winding molding production line and production method provided by the present invention, and the proposed water-assisted separation and demolding technology combined with the thermal expansion and contraction effect and low-friction coating can significantly improve the inner wall smoothness and demolding efficiency of the product, effectively solving the rubber structure damage problem caused by traditional hard demolding. At the same time, laser cutting replaces traditional mechanical cutting, effectively avoiding processing defects such as cord breakage, and further ensuring the integrity of the product end reinforcement layer structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the solutions in the present invention, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 A flow chart of a fiber-reinforced rubber-based rotating body winding molding production line and production method provided by the present invention; Figure 2 A schematic diagram of the conveying equipment for the fiber-reinforced rubber-based rotating body winding molding production line and production method provided by the present invention; Figure 3 Schematic diagram of rubber extrusion equipment for the fiber-reinforced rubber-based rotating body winding molding production line and production method provided by the present invention; Figure 4 A cross-sectional view of a rubber extrusion die for the fiber-reinforced rubber-based rotating body winding molding production line and production method provided by the present invention; Figure 5 Schematic diagram of a parallel light diameter measuring instrument for the fiber-reinforced rubber-based rotating body winding molding production line and production method provided by the present invention; Figure 6 A schematic diagram of the working principle of the diameter measuring instrument for the fiber-reinforced rubber-based rotating body winding molding production line and production method provided by the present invention; Figure 7 This is a schematic diagram of the winding equipment for the fiber-reinforced rubber-based rotating body winding molding production line and production method provided by the present invention.

[0036] The markings in the figure are as follows: 1. Preheating equipment; 2. Conveying equipment; 3. Rubber extrusion equipment; 4. Diameter gauge; 5. Winding equipment; 6. Core removal equipment; 7. Ring cutting equipment; 8. Conveyor drive system; 9. Core conveying unit; 10. First support assembly; 11. Second support assembly; 12. Runner; 13. Melt conveying area; 14. Melt conversion area; 15. Solid conveying area; 16. Feeding area; 17. Die feed port; 18. Extrusion port; 19. Light source; 20. Emitting lens; 21. Measured core rod; 22. Receiving lens; 23. Aperture; 24. Receiving unit; 25. Winding unit; 26. Angle fixing unit. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0038] As mentioned in the background, current industry technological improvements focus on developing continuous production models, such as integrated dipping and calendering lines. While these can shorten process cycles, high-speed operation can easily lead to problems such as uneven cord wetting and tension instability. In summary, the existing technology system has yet to overcome the technical contradiction between "process discreteness leading to limited efficiency" and "insufficient precision leading to performance degradation."

[0039] In order to solve this technical problem, the present invention provides a fiber-reinforced rubber-based rotating body winding molding production line and production method.

[0040] Specifically, please refer to Figure 1-Figure 2 The fiber-reinforced rubber-based rotary body winding molding production line includes a preheating device 1, a conveying device 2, a rubber extrusion device 3, a diameter gauge 4, a winding device 5, a core removal device 6, a ring cutting device 7 and a conveyor drive system 8. The conveyor drive system 8 is composed of the following components: a core conveying unit 9, a first support component 10 and a second support component 11. The first support component 10 is connected to both sides of the surface of the core conveying unit 9, and the second support component 11 is connected to the surface of the core conveying unit 9 near the middle.

[0041] The fiber-reinforced rubber-based rotating body winding production line and production method provided by this invention utilizes an integrated production line design to integrate multiple traditional discrete processes into a continuous closed-loop process, significantly improving production efficiency and equipment space utilization. Combined with the recycling of core rods, this significantly reduces raw material loss and mold maintenance costs, addressing the low efficiency and severe resource waste of traditional processes.

[0042] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Example 1

[0043] Please refer to Figure 3-Figure 7 A fiber reinforced rubber-based rotary winding molding production line includes: a melt conveying area 13 is provided on the left side of the flow channel 12, a melt conversion area 14 is provided at the middle end of the flow channel 12, a solid conveying area 15 is provided on the right side of the flow channel 12, and a feeding area 16 is provided on the top right side of the flow channel 12.

[0044] Specifically, it further comprises a die feed port 17 , and an extrusion port 18 is provided on the left side inside the die feed port 17 .

[0045] Specifically, it also includes a placement seat, a light source 19 and an emitting lens 20. The light source 19 is fixedly connected to the top left side of the placement seat, and the emitting lens 20 is fixedly connected to the top left side of the placement seat near the middle. A core rod placement rack is provided on the top of the placement seat, and a core rod 21 to be measured is inserted on the top of the core rod placement rack. A receiving lens 22 is provided on the top right side of the placement seat near the middle, and an aperture 23 is provided on the top right side of the placement seat.

[0046] Specifically, a winding unit 25 is provided on the top of the placement seat, and an angle fixing unit 26 is provided on the top of the placement seat.

[0047] Through the above-mentioned structural design, a coordinated control method is adopted to ensure that the fiber winding angle is accurate and stable. At the same time, the multi-layer composite extrusion process is used to achieve uniform control of the thickness of the adhesive layer, effectively improving the consistency of the product's mechanical properties and interface bonding strength, and meeting the stringent requirements for structural reliability under complex working conditions.

[0048] Example 2 The fiber-reinforced rubber-based rotor winding molding production line provided in Example 1 is further optimized, and a production method of the fiber-reinforced rubber-based rotor winding molding production line is added.

[0049] Specifically, the following steps are included: S1, mandrel pretreatment; The core rod serves as the core carrier throughout the entire process. The material is mold steel, the surface is sandblasted, and the sandblasting roughness is controlled in the range of 1.6-3.2.

[0050] Before treatment, a core rod with a radius of 45 mm was selected. The core rod was first pretreated and sandblasted with 80-mesh alumina sand. The sandblasting pressure was set to 0.4 MPa. After treatment, the surface roughness Ra value of the core rod was controlled within the range of 2.0±0.2. Subsequently, a polytetrafluoroethylene (PTFE) suspension was evenly coated on the surface of the core rod through an electrostatic spraying process. The coating thickness was controlled within the range of 15±2. The core rod was sintered and cured at a high temperature of 380°C under a nitrogen protection environment, so that the friction coefficient of the final surface of the core rod was ≤0.12, and it could withstand ≥500 demolding cycles.

[0051] Before the core rod enters the production line, a special hose release agent is sprayed on it to improve the subsequent demoulding efficiency by forming an isolation film on the surface of the core rod, while protecting the core rod and improving the surface quality of the inner wall of the hose.

[0052] The core rod first enters the infrared-microwave composite preheating equipment, where the infrared band is responsible for surface heating and the microwave realizes core rod body heating. The internal preheating time is 60 seconds. The microwave field distribution is optimized by 6 groups of 2.45GHz magnetrons combined with multi-mode resonant cavities to achieve uniform heating inside the core rod. According to the type of rubber compound, the surface temperature of the core rod is adjusted to 120℃ accordingly, which increases the initial adhesion of the rubber compound by 50%.

[0053] The preheated core rod is conveyed to the extrusion station via a conveying device. The first-stage rubber extrusion equipment uses a two-stage screw extruder equipped with a cross-rotating die head. The die head flow channel is designed as a tapered spiral structure with a built-in pressure compensation valve. The diameter gauge uses a 630nm wavelength semiconductor laser and a double telecentric lens, combined with a linear array CCD sensor and sub-pixel interpolation algorithm, with a measurement accuracy of ±0.01mm; Rubber extrusion equipment can dynamically optimize extrusion process parameters: when the diameter gauge detects that the thickness deviation of the base rubber layer exceeds 0.05mm, it will feed the data back to the rubber extrusion equipment in real time, and the control system will automatically adjust the screw speed to ensure that the rubber layer thickness meets the standard.

[0054] S2, winding and fixing process; The first-stage winding equipment consists of two parts: the winding unit and the angle fixing unit.

[0055] The winding unit is responsible for winding the fibers on the core rod according to the angle and density requirements of the product, with the extrusion speed as the basic speed. After the control system reads the speed of the extrusion equipment, it changes the winding angle by adjusting the circumferential speed of the spindle.

[0056] The raw material for fiber winding is 930dtex / 2 polyamide fiber, and the tension control system has an accuracy of ±1.0N. The winding unit 25, driven by a six-axis linkage robot, rotates the spindle group around the mandrel, rotating the spindle group in a spiral motion around the mandrel at a speed of 58r / min. The yarn guide rotates synchronously with the spindle group and translates along the mandrel axis at a linear speed of 1.5m / min. The two work together to form a 60° helical angle cord arrangement trajectory. The angle fixing unit 26 uses an external auxiliary line to lock the spatial position of the cord in real time, ensuring that the winding angle deviation is ≤0.5°. Before entering the next extrusion station, the auxiliary line is accurately recovered by the auxiliary machine position take-up system to avoid interference with subsequent processes.

[0057] During the second cord winding, the spindles rotate in opposite directions, forming an orthogonal mesh structure that resists shear. After each cord layer is wound, a gradient rubber coating is applied to the middle and outer layers, ultimately creating a five-layer composite structure of rubber-cord-rubber-cord-rubber.

[0058] The winding angle can be adjusted in real time without interrupting the operation of the equipment, thereby achieving a variable angle effect where different areas on the same mandrel have different winding angles.

[0059] The winding angle formula is: ,in is the winding angle, is the peripheral speed of the spindle, is the core rod radius, is the traction speed.

[0060] The angle-fixing unit's tension pay-off system uses an external auxiliary wire to lock the cord arrangement angle, thereby keeping the fiber angle on the mandrel unchanged. Before entering the next extrusion station, the auxiliary machine's take-up system accurately retracts the auxiliary wire to avoid structural interference.

[0061] The winding speed of the auxiliary wire of the angle fixing unit is coordinated with the winding unit.

[0062] The operating parameters of the second-stage rubber extrusion equipment are consistent with those of the first-stage rubber extrusion equipment.

[0063] The second-stage winding equipment wraps the cord at a spiral angle symmetrical to that of the first cord layer, so that the upper and lower cord layers form a cross-mesh shear-resistant structure. The operating parameters of the third-stage rubber extrusion equipment are consistent with those of the first-stage rubber extrusion equipment.

[0064] S3, subsequent processing; The demoulding stage uses water-assisted separation technology. The core-removing equipment injects warm water into the gap between the core rod and the product, and uses the rubber shrinkage characteristics to achieve lossless demoulding, ensuring the smoothness of the product's inner wall.

[0065] The circular cutting equipment uses a fiber laser cutting head to avoid cord damage caused by traditional saws. It moves synchronously along the core rod axis (speed 1-5m / min) and cuts according to the required length of the product.

[0066] After demoulding, the core rod enters the high-pressure water jet cleaning station with a pressure of 5-10MPa and a rotating brush of 200-400r / min to remove residual rubber within 30 seconds.

[0067] During the demoulding stage, 50°C warm water (pressure 0.6MPa) is injected into the interface between the core rod and the finished product, and non-destructive separation is achieved by utilizing the 1.5% thermal shrinkage property of CR rubber at 50°C.

[0068] After the finished product is demoulded, it is cut to a fixed length along the axial direction using a high-precision fiber laser cutting system to ensure that the cut seam is smooth and there is no cord damage. The cutting efficiency and product dimensional tolerance meet the needs of industrial mass production.

[0069] Core rod maintenance utilizes an 8MPa high-pressure water jet combined with a silicon carbide rotating brush (300 rpm) for deep cleaning. Residual rubber content is ≤1.0g after a single cycle. After cleaning, the core rods are infrared-dried and inspected for surface cracks using an eddy current flaw detector (sensitivity 0.2mm). Defective core rods are automatically removed.

[0070] After cleaning, the core rod is dried by infrared and tested for surface cracks by eddy current flaw detector. The core rod with surface damage exceeding 0.2mm is automatically removed. A single core rod can be reused ≥500 times, and the anti-stick coating is re-applied every 50 cycles.

[0071] Through the above-mentioned structural design, the proposed water-assisted separation demoulding technology combined with the thermal expansion and contraction effect and low-friction coating can significantly improve the inner wall smoothness and demoulding efficiency of the product, effectively solving the rubber structure damage problem caused by traditional hard demoulding. At the same time, laser cutting replaces traditional mechanical cutting, effectively avoiding processing defects such as cord breakage, and further ensuring the integrity of the product end reinforcement layer structure.

Claims

1. A fiber-reinforced rubber-based rotary body winding molding production line, comprising a preheating device (1), a conveying device (2), a rubber extrusion device (3), a diameter gauge (4), a winding device (5), a core removal device (6), a ring cutting device (7) and a conveyor drive system (8), characterized in that; The conveyor drive system (8) is composed of the following components: a core conveying unit (9), a first support component (10) and a second support component (11), wherein the first support component (10) is connected to both sides of the surface of the core conveying unit (9), and the second support component (11) is connected to the surface of the core conveying unit (9) near the middle.

2. The fiber reinforced rubber-based rotating body winding molding production line according to claim 1 further comprises a flow channel (12), characterized in that: A melt conveying zone (13) is provided on the left side of the flow channel (12), a melt conversion zone (14) is provided at the middle end of the flow channel (12), a solid conveying zone (15) is provided on the right side of the flow channel (12), and a feed zone (16) is provided on the right side of the top of the flow channel (12).

3. The fiber reinforced rubber-based rotary body winding molding production line according to claim 2 further comprises a die feed port (17), characterized in that: An extrusion port (18) is provided on the left side of the interior of the die feed port (17).

4. The fiber reinforced rubber-based rotary body winding molding production line according to claim 3 further comprises a placement seat, a light source (19) and an emission lens (20), characterized in that: The light source (19) is fixedly connected to the left side of the top of the placement seat, the emitting lens (20) is fixedly connected to the left side of the top of the placement seat near the middle, a core rod placement rack is provided on the top of the placement seat, a core rod to be measured (21) is inserted on the top of the core rod placement rack, a receiving lens (22) is provided on the right side of the top of the placement seat near the middle, and an aperture (23) is provided on the right side of the top of the placement seat.

5. The fiber reinforced rubber-based rotating body winding molding production line and production method according to claim 4, characterized in that: A winding unit (25) is provided on the top of the placement seat, and an angle fixing unit (26) is provided on the top of the placement seat.

6. A production method for a fiber-reinforced rubber-based rotating body winding molding production line, characterized in that: The following steps are involved: S1, mandrel pretreatment; The core rod is used as the core carrier throughout the whole process. The material is die steel, and the surface is sandblasted. The sandblasting roughness is controlled in the range of 1.6-3.

2. The surface of the core rod is coated with polytetrafluoroethylene anti-stick coating, and a 10-20 gradient coating is formed by electrostatic spraying process. After the coating is sintered and cured at 380℃, the surface friction coefficient is ≤0.12 and can withstand ≥500 demoulding cycles; Before the mandrel enters the production line, a special hose release agent is sprayed on it to form an isolation film on the surface of the mandrel to improve the subsequent demoulding efficiency, while protecting the mandrel and improving the surface quality of the hose inner wall; The core rod first enters the infrared-microwave composite preheating equipment, where the infrared band is responsible for surface heating and the microwave band is responsible for heating the core rod body. The internal preheating time is 30-60 seconds. Depending on the type of rubber compound, the core rod surface temperature is adjusted to 60-120℃, which improves the initial adhesion of the rubber compound by 40%-60%. S2. Winding and fixing The first-stage winding equipment consists of two parts: the winding unit and the angle fixing unit; The winding unit is responsible for winding the fibers on the mandrel according to the angle and density requirements of the product. The extrusion speed is used as the basic speed. After the control system reads the speed of the extruder, it changes the winding angle by adjusting the circumferential speed of the spindle. The winding angle can be adjusted in real time without interrupting the operation of the equipment, so that different areas on the same mandrel can have different winding angles. The winding angle formula is: ,in is the winding angle, is the peripheral speed of the spindle, is the core rod radius, is the traction speed; The angle fixing unit's tension pay-off system uses an external auxiliary wire to lock the cord arrangement angle, thereby maintaining the fiber angle on the mandrel. Before entering the next extrusion station, the auxiliary take-up system accurately retracts the auxiliary wire to avoid structural interference. S3. Subsequent processing The demoulding stage uses water-assisted separation technology. The core-removing equipment injects warm water into the gap between the core rod and the product, utilizing the rubber shrinkage characteristics to achieve lossless demoulding and ensure the smoothness of the product inner wall. The circular cutting equipment uses a fiber laser cutting head to avoid the cord damage caused by traditional knife saws. It moves synchronously along the axial direction of the mandrel (speed 1-5m / min) and cuts according to the required length of the product. After demoulding, the core rod enters the high-pressure water jet cleaning station with a pressure of 5-10MPa and a rotating brush at 200-400r / min to remove residual rubber within 30 seconds; After cleaning, the core rods are dried by infrared and tested for surface cracks by eddy current flaw detector, and core rods with surface damage exceeding 0.2mm are automatically rejected.

7. The fiber reinforced rubber-based rotating body winding molding production line production method according to claim 6, characterized in that: In step S3, a single core rod can be reused ≥500 times, and the anti-stick coating is re-coated every 50 cycles.

8. The production method of the fiber reinforced rubber-based rotating body winding molding production line according to claim 6, characterized in that: Wherein, in step S2, the winding speed of the auxiliary wire of the angle fixing unit is coordinated with the winding unit; The operating parameters of the second-stage rubber extrusion equipment are consistent with those of the first-stage rubber extrusion equipment; The second-stage winding equipment wraps the cord at a spiral angle symmetrical to that of the first cord layer, so that the upper and lower cord layers form a cross-mesh shear-resistant structure. The operating parameters of the third-stage rubber extrusion equipment are consistent with those of the first-stage rubber extrusion equipment.

9. The production method of the fiber reinforced rubber-based rotating body winding molding production line according to claim 6, characterized in that: In step S1, the preheated core rod is conveyed to the extrusion station via a conveying device. The first-stage rubber extrusion equipment adopts a two-stage screw extruder equipped with a cross-rotating die head. The die head flow channel is designed as a tapered spiral structure with a built-in pressure compensation valve. The diameter gauge uses a 630nm wavelength semiconductor laser and a double telecentric lens, combined with a linear array CCD sensor and sub-pixel interpolation algorithm, with a measurement accuracy of ±0.01mm; Rubber extrusion equipment can dynamically optimize extrusion process parameters: when the diameter gauge detects that the thickness deviation of the base rubber layer exceeds 0.05mm, it will feed the data back to the rubber extrusion equipment in real time, and the control system will automatically adjust the screw speed to ensure that the rubber layer thickness meets the standard.

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