Automobile water pipe blank peroxidation treatment online regulation and control system based on real-time parameter feedback

Abstract

The invention relates to the technical field of automobile rubber part manufacturing and high polymer material processing, and discloses an automobile water pipe blank peroxidation treatment online regulation and control system based on real-time parameter feedback. Comprising a peroxide rubber material formula intelligent design unit, a three-layer thickened structure modeling unit, a rubber material pre-preparation unit, a three-layer co-extrusion online forming unit, a double-stage peroxide vulcanization unit, a closed-loop process parameter regulation and control unit, a post-processing and shaping unit and a quality online judgment unit, wherein the peroxide rubber material formula intelligent design unit outputs a raw material formula list; the three-layer thickening structure modeling unit designs a peroxide layer into an outer layer / a added layer / an inner layer, the sizing material pre-preparation unit pretreats raw materials, the three-layer co-extrusion on-line forming unit completes continuous coating of thickened pipe blanks, the double-stage peroxide vulcanization unit completes peroxide vulcanization treatment, the closed-loop process parameter regulation and control unit is provided with sensors along a production line, and the closed-loop process parameter regulation and control unit is used for controlling the closed-loop process parameter regulation and control unit. The post-processing and shaping unit is used for shaping a finished pipe blank, and the quality on-line judgment unit is used for carrying out full inspection on the final pipe blank.

Description

Technical Field

[0001] This invention relates to the field of automotive rubber parts manufacturing and polymer material processing technology, specifically to an online control system for the peroxidation treatment of automotive water pipe blanks based on real-time parameter feedback. Background Technology

[0002] Currently, most mainstream automotive rubber water hoses on the market adopt traditional sulfur vulcanization systems and single-layer or two-layer structures. This traditional technology has several shortcomings: First, the polysulfide bonds formed by sulfur vulcanization have low bond energies, resulting in poor heat resistance of the rubber (long-term operating temperature usually does not exceed 125℃), making it prone to aging, hardening, and cracking in the high-temperature environment of the engine compartment; second, the traditional two-layer structure (rubber hose + braided layer) has bottlenecks in terms of pulse pressure resistance, burst strength, and overall durability, making it difficult to meet the stringent requirements of the cooling system of new-generation high-power, high-heat-load engines; finally, existing production processes generally lack real-time parameter monitoring and closed-loop feedback mechanisms throughout the entire process, resulting in large process fluctuations and difficulty in ensuring product quality consistency, thus leading to a limited service life of the water hoses and a risk of premature failure. Summary of the Invention Technical problems to be solved

[0003] To address the shortcomings of existing technologies, this invention provides an online control system for the peroxidation treatment of automotive water pipe blanks based on real-time parameter feedback. This system has the advantages of significantly improving the high-temperature resistance and aging resistance of products, enhancing structural strength and service life, and ensuring consistent product quality. It solves the problems of insufficient heat resistance, easy aging, short lifespan, and poor production process stability of traditional automotive rubber water pipes caused by material and structural defects. Technical solution

[0004] To achieve the above objectives, the present invention provides the following technical solution: an online control system for peroxide treatment of automotive water pipe blanks based on real-time parameter feedback, including an intelligent design unit for peroxide rubber compound formulation, a three-layer thickened structure modeling unit, a rubber compound pre-preparation unit, a three-layer co-extrusion online molding unit, a two-stage peroxide vulcanization unit, a closed-loop process parameter control unit, a post-treatment and shaping unit, and an online quality judgment unit. The intelligent design unit for peroxide compound formulation has a built-in raw material characteristic database. Based on the raw material characteristic data, it dynamically generates the types and mass ratio ranges of raw materials that conform to the three regions of the outer layer, the added layer and the inner layer of the tube blank, and outputs the raw material formulation list. The three-layer thickened structure modeling unit designs the peroxide functional layer as a three-level gradient of outer layer / addition layer / inner layer, and sets the thickness target value for each layer to provide a digital prototype for subsequent extrusion; The rubber pre-preparation unit performs a three-stage pretreatment of the raw material formula, namely vacuum drying, low-temperature plasticizing, and masterbatch mixing, and outputs the mixed rubber. The three-layer co-extrusion online forming unit uses a co-extrusion die head to match the melt temperature, pressure and flow rate curves of the outer layer / addition layer / inner layer in real time, so as to complete the continuous coating of the thickened tube blank; The two-stage peroxy vulcanization unit completes the peroxy vulcanization process in two stages. The closed-loop process parameter control unit is equipped with three types of sensors along the production line: infrared temperature measurement, laser thickness measurement and ultrasonic flaw detection, and the data is transmitted back to the PID+model prediction controller. The post-processing and shaping unit shapes the tube blank by using an online deburring knife set and a low-temperature water bath, and finally rolls it up into a finished tube blank. The online quality assessment unit uses non-destructive testing technology to perform a full inspection of the final tube blanks.

[0005] Preferably, the raw material formula in the intelligent design unit for peroxide compound formulation is designed as follows: base rubber 65%–75%; peroxide vulcanizing agent 1%–3%; antioxidant 0.5%–1.5%; reinforcing agent 13%–21%; plasticizer 7%–11%.

[0006] Preferably, the matrix rubber is composed of EPDM rubber and fluororubber in a 3:2 ratio; the reinforcing agent is composed of short aramid fibers and carbon black N330 in a 1:4 ratio.

[0007] Preferably, the three-layer thickened structure modeling unit is responsible for establishing the digital prototype of the tube blank, and the specific design is as follows: the inner layer thickness is controlled at 1.0 to 2.0 mm; the thickened layer thickness is controlled at 2.0 to 3.0 mm; and the outer layer thickness is controlled at 0.8 to 1.5 mm.

[0008] Preferably, the pre-preparation unit performs three-stage pretreatment of the three layers of raw materials according to the formulation list, and the process is as follows: S1.1, Plasticizing: The base rubber is treated at 70-80℃ for 10-20 minutes; S1.2 Drying: The reinforcing agent and antioxidant are dried at 95-100℃ for 2-3 hours; S1.3, Mixing: Mix in an internal mixer at 100-110℃ and 40-50r / min for 18-20min.

[0009] Preferably, the three-layer co-extrusion online forming unit uses a co-extrusion die to composite the three layers of rubber material according to the digital prototype, and the control conditions are as follows: (1) Extrusion temperature: inner layer 80-95℃, additional layer 95-110℃, outer layer 85-95℃; (2) Extrusion pressure: 15-25 MPa; (3) Traction speed: 1-3 m / min, precisely matched with the extrusion speed; (4) Cooling and shaping: Cool at 20-30℃ water temperature for 5-10 minutes.

[0010] Preferably, the two-stage peroxy vulcanization unit completes carbon-carbon crosslinking in two stages: S2.1, Primary vulcanization: In a vulcanizing tank, under a N2 protective environment, at 160-180℃ and 0.5-1.0MPa, it is treated for 10-15 minutes. S2.2 Secondary vulcanization: In a hot air oven, treat at 180-200℃ for 2-4 hours.

[0011] Preferably, the closed-loop process parameter control unit is responsible for deploying the internal mixer temperature / torque sensor, the extruder pressure / temperature sensor, the billet thickness detector, and the vulcanizing tank temperature and pressure sensor, so as to achieve precise parameter control through the sensors and detectors.

[0012] Preferably, the closed-loop process parameter control unit performs a three-stage control process: (1) Raw material pretreatment stage: By adjusting the mixing time and temperature in real time, the mixing temperature is controlled within the set range of 90-110℃ and the time is within 15-20min; (2) Tube blank forming stage: Based on the real-time feedback of the laser thickness gauge, dynamically adjust the extrusion speed and the feeding pressure of each layer, control the extrusion pressure at 15-25MPa and the traction speed at 1-3m / min, and control the thickness of the three-zone layer at the same time. (3) Oxygen peroxidation stage: Based on the temperature field data inside the vulcanizing tank, adjust the temperature and time of the secondary vulcanization in real time within the window of 180-200℃ / 2~4h.

[0013] Preferably, the post-processing and shaping unit performs fine processing on the vulcanized tube blank: removing the flash using an online deburring knife set, and then rapidly shaping it in a low-temperature water bath at 1-5℃ for 30-60 minutes.

[0014] Compared with the prior art, the present invention provides an online control system for the peroxidation treatment of automotive water pipe blanks based on real-time parameter feedback, which has the following beneficial effects: 1. This invention adopts a three-layer thickened composite structure design (outer layer, thicker layer, and inner layer) and applies a peroxide (peroxy) vulcanization system, which achieves the beneficial effects of greatly improving the corrosion resistance, high temperature and high pressure resistance, and anti-aging performance of the pipe blank. Among them, the carbon-carbon crosslinking bond energy formed by peroxy vulcanization is much higher than that of traditional sulfur bonds, giving the rubber better thermal and chemical stability. The three-layer structure provides excellent pressure bearing capacity and fatigue resistance, making the service life of the water pipe far exceed that of existing two-layer structure products.

[0015] 2. This invention constructs a process parameter control module that spans the entire process from raw material pretreatment, tube blank forming, peroxyvulcanization to post-treatment. By deploying real-time monitoring sensors and a closed-loop control link, it achieves precise phased control of the process, ensuring consistent quality and stability of the finished tube blank. This allows the system to adjust key parameters such as vulcanization temperature, time, and pressure in real time, effectively eliminating defects such as uneven crosslinking and excessive residues caused by process fluctuations. This ensures that every water pipe on the production line meets the designed high-performance specifications.

[0016] 3. This invention achieves the goal of thoroughly completing the rubber crosslinking reaction and maximizing the stability and durability of the rubber network structure by implementing a two-stage vulcanization process. The secondary vulcanization (post-vulcanization) process effectively eliminates the peroxides and byproducts remaining after the primary vulcanization, thereby significantly reducing compression set and fully releasing the long-term heat resistance of the product (such as EPDM material). This allows the finished water pipe to work stably in high-temperature environments of 150°C to 250°C for a long time, fundamentally solving the problems of softening, deformation and aging of traditional water pipes at high temperatures. Attached Figure Description

[0017] Figure 1 This is a system control flowchart of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1 The online control system for peroxidation treatment of automotive water pipe blanks based on real-time parameter feedback includes an intelligent design unit for peroxidation compound formulation, a three-layer thickened structure modeling unit, a pre-preparation unit for compound, a three-layer co-extrusion online molding unit, a two-stage peroxidation vulcanization unit, a closed-loop process parameter control unit, a post-treatment and shaping unit, and an online quality judgment unit. The intelligent design unit for peroxide compound formulation has a built-in raw material characteristic database. Based on the raw material characteristic data, it dynamically generates the types and mass ratio ranges of raw materials that conform to the three zones of the outer layer, the added layer and the inner layer of the tube blank, and outputs the raw material formulation list. The three-layer thickened structure modeling unit designs the peroxide functional layer as a three-level gradient of outer layer / layering / inner layer, and sets the target values ​​of thickness, modulus and crosslinking density for each layer to provide a digital prototype for subsequent extrusion; The rubber compound pre-preparation unit performs a three-stage pretreatment process on the raw material formula, namely vacuum drying, low-temperature plasticizing, and masterbatch mixing, to output a compound with stable Mooney viscosity and volatile matter ≤0.3%. The three-layer co-extrusion online forming unit uses a co-extrusion die head to match the melt temperature-pressure-flow rate curves of the outer layer / addition layer / inner layer in real time, thereby completing the continuous coating of the thickened tube blank. The two-stage peroxy vulcanization unit completes the peroxy vulcanization process in two stages. The first stage involves carbon-carbon crosslinking under N2 protection, and the second stage involves deep post-curing in high-temperature steam, which improves the temperature resistance to ≥80% tensile retention after aging at 150℃ for 1000h. The closed-loop process parameter control unit is equipped with three types of sensors along the production line: infrared temperature measurement, laser thickness measurement, and ultrasonic flaw detection. The data is fed back to the PID+model prediction controller to achieve second-level correction of temperature ±1℃, thickness ±0.05 mm, and crosslinking degree ±1%. The post-processing and shaping unit uses an online deburring knife set and a low-temperature water bath to quickly shape the tube, eliminate internal stress and ensure roundness ≤0.2mm, and finally roll it up into a finished tube blank; The online quality assessment unit uses non-destructive testing technology to inspect all final tube blanks.

[0020] Specifically, the raw material formulation design in the intelligent design unit for peroxide-treated rubber compound formulation is as follows: Base rubber: 65%–75% (provides basic temperature and corrosion resistance); Peroxide vulcanizing agent (such as dicumyl peroxide DCP): 1% to 3% (to generate carbon-carbon crosslinks); Antioxidant (4010NA): 0.5% to 1.5% (to improve aging resistance); Reinforcing agent (composed of short aramid fibers and carbon black N330 in a 1:4 ratio): 13%–21% (enhances mechanical strength); Plasticizer (paraffin oil): 7%–11% (to improve processing fluidity); The above formula takes into account both the efficiency of peroxy vulcanization crosslinking and the overall performance of the tube blank, and is suitable for the molding requirements of three-layer structure.

[0021] The base rubber is composed of 3:2 ethylene propylene diene monomer (EPDM) rubber and fluororubber; The reinforcing agent consists of short aramid fibers in a 1:4 ratio and carbon black N330; The functions of the raw materials are shown in Table 1 below: Table 1

[0022] The raw material types and mass ratio ranges for the outer, additional, and inner layers of the tube blank are shown in the table below (the above raw material formulas are used as the sum and allocated to the following three layers): Table 2: Raw Material Quality Allocation Table for Each Functional Layer

[0023] This formula is designed to balance the efficiency of peroxy vulcanization crosslinking with the overall performance of the tube blank. The outer layer focuses on weather resistance and aging resistance, the added layers focus on mechanical strength, and the inner layer focuses on resistance to media corrosion, perfectly meeting the requirements of three-layer structure molding.

[0024] Specifically, the three-layer thickened structural modeling unit is responsible for building the digital prototype of the tube blank, and the specific design is as follows: (1) Inner layer (fluid contact layer): The thickness is controlled at 1.0 to 2.0 mm, focusing on resistance to coolant / oil corrosion and low friction; (2) Addition layer (strength support layer): The thickness is controlled at 2.0 to 3.0 mm, and the crosslinking density target value is the highest. The core is to improve the strength against high temperature and high pressure. (3) Outer layer (protective layer): The thickness is controlled between 0.8 and 1.5 mm, with an emphasis on weather resistance and scratch resistance; The advantages are: the total thickness is 30% to 50% greater than that of the traditional two-layer structure, which lays the structural foundation for a longer lifespan.

[0025] Specifically, the rubber compound pre-preparation unit performs three-stage pretreatment on the three layers of raw materials according to the formulation list to ensure uniform and stable rubber compound quality: S1.1, Plasticizing: The base rubber is treated at 70-80℃ for 10-20 minutes to soften the rubber and improve the uniformity of subsequent mixing; S1.2 Drying: The reinforcing agent and antioxidant are dried at 95-100℃ for 2-3 hours to completely remove moisture and avoid defects in subsequent vulcanization; S1.3, Mixing: Mix in an internal mixer at 100-110℃ and 40-50r / min for 18-20min. Monitor to ensure torque fluctuation ≤±0.5N・m, and output qualified compound with stable Mooney viscosity and volatile matter ≤0.3%.

[0026] Specifically, the three-layer co-extrusion online forming unit uses a co-extrusion die to composite the three layers of rubber material according to the digital prototype. The key control conditions are as follows: (1) Extrusion temperature: inner layer 80-95℃, extension layer 95-110℃, outer layer 85-95℃, to ensure rubber fluidity while avoiding scorching; (2) Extrusion pressure: 15-25MPa, to ensure that the three-layer interface is tightly bonded in the die head, without any risk of delamination; (3) Traction speed: 1-3 m / min, precisely matched with the extrusion speed to avoid tube blank stretching deformation; (4) Cooling and shaping: Cool at 20-30℃ water temperature for 5-10 minutes to stabilize the tube blank size and ensure that the outer diameter deviation is ≤ ±0.5mm.

[0027] Specifically, the two-stage peroxy vulcanization unit completes carbon-carbon crosslinking in two phases to impart the final temperature and aging resistance properties to the product: S2.1, Primary vulcanization: In a vulcanizing tank, under a N2 protective environment, at 160-180℃ and 0.5-1.0MPa, the peroxide is treated for 10-15 minutes to decompose and initially form a cross-linked network. S2.2 Secondary vulcanization (post-vulcanization): In a hot air oven, treat at 180-200℃ for 2-4 hours to completely eliminate residual peroxides and low-molecular-weight volatiles, improving crosslinking uniformity. This process enables the EPDM-based rubber compound to achieve a long-term temperature resistance rating of ≥80% tensile strength after aging at 150℃ for 1000 hours. Specifically, the closed-loop process parameter control unit is responsible for deploying internal mixer temperature / torque sensors, extruder pressure / temperature sensors, billet thickness detectors, and vulcanizing tank temperature and pressure sensors (all with an accuracy of ≥±1℃ / ±0.1MPa). It achieves precise parameter control through sensors and detectors, providing a basis for real-time monitoring parameters for the subsequent three stages.

[0028] Specifically, the closed-loop process parameter control unit operates in three stages: (1) Raw material pretreatment stage: By adjusting the mixing time and temperature in real time, the mixing temperature is controlled within the set range of 90-110℃ and the time is within 15-20min; (2) Tube blank forming stage: Based on the real-time feedback of the laser thickness gauge, dynamically adjust the extrusion speed and the feeding pressure of each layer to ensure that the extrusion pressure is stable at 15-25MPa and the traction speed is 1-3m / min, and accurately control the thickness of the inner layer and other layers. (3) Oxygen peroxidation stage: Based on the temperature field data inside the vulcanizing tank, the temperature and time of the secondary vulcanization are adjusted in real time to ensure that the process is stable within the core window of 180-200℃ / 2~4h.

[0029] Control logic: The system adopts a sampling frequency of 1 to 3 times / second. When any parameter in (1) to (3) fluctuates more than ±5% of the set value, an alarm will be automatically triggered and a correction command will be output to the equipment (such as heater, servo motor). Through PID and model predictive control algorithms, the system can achieve precise second-level control of temperature ±1℃ and thickness ±0.05mm.

[0030] Specifically, the post-processing and shaping unit performs fine treatment on the vulcanized tube blank: the flash is removed using an online deburring knife set, and then it is rapidly shaped in a low-temperature water bath at 1-5℃ for 30-60 minutes to eliminate internal stress and stabilize the crystal structure.

[0031] Specifically, the online quality assessment unit's testing indicators include: appearance (no cracks or bubbles, pass rate ≥99%), dimensions (wall thickness deviation ±0.1mm), temperature resistance (weight loss ≤3% at 250℃ / 1000h), and aging resistance (strength retention rate ≥80% after 1000h xenon lamp aging). The product is an automotive water pipe blank with high temperature resistance above 250℃, corrosion resistance, high pressure strength, and long service life.

[0032] Examples 1-3 were prepared using the formulation and process of this invention, and compared with Comparative Examples 1-3 prepared using existing formulations and processes, as detailed in Table 3 below: Table 3

[0033] The performance of the finished tube blanks from the examples and comparative examples was tested, and the test data are shown in Table 4 below: Table 4

[0034] Note: Burst pressure and pulse life refer to automotive pipeline performance testing standards (such as TL52361, GMW14785); oil resistance testing methods refer to industry standards (such as IRM903# oil 100℃×70h); appearance and dimensional inspection methods refer to the original pipe inspection record form.

[0035] Table 3 shows that the weight loss of Examples 1-3 after aging at 250℃ / 1000h was ≤2.5% (far lower than the ≥4.8% of the comparative example), and the strength retention rate after xenon lamp aging was ≥85%. These data verify that the carbon-carbon crosslinking bonds formed by peroxides in the process of this invention (compared to the sulfur bonds of sulfur sulfidation) have higher bond energy and can significantly improve thermo-oxidative stability. The burst pressure (≥4.6MPa) and high-temperature pulse life (50,000 cycles) of the examples are higher than those of the comparative example, which is due to the high aromaticity of the added layers in their three-layer structure. The fiber content (8%–12%) and secondary vulcanization eliminate residual peroxides, making the crosslinking network more uniform. The three-layer gradient structure (total thickness 4.0–4.5 mm) of the examples increases the thickness by 30%–50% compared to the single-layer structure (3.0–3.5 mm) of Comparative Examples 1–2. Combined with peroxy treatment, the tube blank's resistance to deformation under high temperature and high pressure is improved, and its service life is extended by 3–5 times. Furthermore, the peroxy vulcanization system of Examples 1–3 does not produce toxic nitrosamines during the process preparation (which may be generated by traditional sulfur vulcanization), meeting environmental protection requirements.

[0036] This system achieves long-term stable operation of automotive water pipe blanks in high-temperature environments above 250℃ through intelligent design of peroxide compound formulation, modeling of three-layer thickened structure, and coordinated control of two-stage peroxide vulcanization.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online control system for the peroxide treatment of automotive water pipes based on real-time parameter feedback, characterized in that, The intelligent design unit of peroxide rubber formula, the three-layer thickening structure modeling unit, the rubber pre-preparation unit, the three-layer co-extrusion online forming unit, the two-stage peroxide vulcanization unit, the closed-loop process parameter control unit, the post-processing and sizing unit, and the online quality determination unit are arranged in sequence. The intelligent design unit of peroxide rubber formula is internally provided with a raw material property database, and generates raw material types and mass ratio intervals that meet the three zones of the pipe blank outer layer, the layer, and the inner layer according to the raw material property data, and outputs a raw material formula list. The three-layer thickening structure modeling unit designs the peroxide functional layer as a three-level gradient of the outer layer / the layer / the inner layer, and sets a thickness target value layer by layer to provide a digital prototype for subsequent extrusion. The rubber pre-preparation unit performs three-stage pretreatment of vacuum drying, low-temperature plasticating, and masterbatch mixing on the raw material formula, and outputs a mixed rubber. The three-layer co-extrusion online forming unit adopts a co-extrusion die head to real-time match the melt temperature, pressure, and flow rate curves of the outer layer / the layer / the inner layer, and completes the continuous coating of the thickened pipe blank. The two-stage peroxide vulcanization unit completes peroxide vulcanization treatment in two stages. The closed-loop process parameter control unit is provided with three types of sensors, including infrared temperature measurement, laser thickness measurement, and ultrasonic flaw detection, along the production line, and the data is fed back to a PID+model prediction controller. The post-processing and sizing unit is provided with an online deburring knife set and a low-temperature water tank for sizing, and finally winds the pipe blank into a finished product. The online quality determination unit adopts non-destructive testing technology to perform full-number inspection on the final pipe blank.

2. The online control system for the pipe billet over-oxygen treatment of automobile water pipes based on real-time parameter feedback according to claim 1, characterized in that: In the intelligent design unit of peroxide rubber formula, the raw material formula is designed as follows: base rubber 65%-75%; peroxide vulcanizing agent 1%-3%; antioxidant 0.5%-1.5%; reinforcing agent 13%-21%; plasticizer 7%-11%.

3. The online control system for the real-time parameter feedback based automobile water pipe blank peroxide treatment according to claim 2, characterized in that: The base rubber is composed of 3:2 of ethylene-propylene-diene rubber and fluororubber; and the reinforcing agent is composed of 1:4 of short aramid fiber and carbon black N330.

4. The online control system for the pipe billet over-oxygen treatment of automobile water pipe based on real-time parameter feedback according to claim 1, characterized in that: The three-layer thickening structure modeling unit is responsible for establishing a digital prototype of the pipe blank, and is specifically designed as follows: the inner layer thickness is controlled within 1.0-2.0 mm; the layer thickness is controlled within 2.0-3.0 mm; and the outer layer thickness is controlled within 0.8-1.5 mm.

5. The online control system for the real-time parameter feedback based automobile water pipe blank peroxide treatment according to claim 1, characterized in that: The rubber pre-preparation unit performs three-stage pretreatment on the three layers of raw materials according to the formula list, and the process is as follows: S1.1, plasticating: the base rubber is treated at 70-80℃ for 10-20 min; S1.2, drying: the reinforcing agent and the antioxidant are dried at 95-100℃ for 2-3 h; S1.3, mixing: in an internal mixer, the mixing is performed at 100-110℃ and 40-50 r / min for 18-20 min.

6. The online control system for the pipe billet over-oxygen treatment of automobile water pipe based on real-time parameter feedback according to claim 1, characterized in that: The three-layer co-extrusion online forming unit adopts a co-extrusion die head to compound and form the three layers of rubber according to the digital prototype, and the control conditions are as follows: (1) extrusion temperature: 80-95℃ for the inner layer, 95-110℃ for the layer, and 85-95℃ for the outer layer; (2) extrusion pressure: 15-25 MPa; (3) pulling speed: 1-3 m / min, accurately matched with the extrusion speed; (4) cooling and sizing: cooling at 20-30℃ water temperature for 5-10 min.

7. The online control system for the real-time parameter feedback based automobile water pipe blank peroxide treatment according to claim 1, characterized in that: The two-stage peroxide vulcanization unit completes carbon-carbon crosslinking in two stages. S2.1, primary vulcanization: in a vulcanization tank, under N2 protection, 160-180℃, 0.5-1.0MPa, 10-15min; S2.2, secondary vulcanization: in a hot air oven, 180-200℃, 2-4h.

8. The online control system for the pipe billet over-oxygen treatment of automobile water pipe based on real-time parameter feedback according to claim 1, characterized in that: The closed-loop process parameter control unit is responsible for deploying temperature / torque sensors of the internal mixer, pressure / temperature sensors of the extruder, a tube blank thickness detector, and temperature / pressure sensors of the vulcanization tank, and realizes precise control of parameters through sensors and detectors.

9. The online control system for the pipe billet over-oxygen treatment of automobile water pipe based on real-time parameter feedback according to claim 1, characterized in that: The closed-loop process parameter control unit controls the process in three stages: (1) raw material pretreatment stage: by adjusting the mixing time and temperature in real time, the mixing temperature is controlled in the range of 90-110℃, and the time is controlled in the range of 15-20min; (2) tube blank forming stage: according to the real-time feedback of the laser thickness gauge, dynamically adjust the extrusion speed and the pressure of each layer of material supply, control the extrusion pressure in the range of 15-25MPa, the pulling speed in the range of 1-3m / min, and control the thickness of the three zones at the same time; (3) peroxide vulcanization stage: according to the temperature field data in the vulcanization tank, adjust the temperature and time of secondary vulcanization in the window of 180-200℃ / 2-4h in real time.

10. The online control system for the pipe billet over-oxygen treatment of automobile water pipe based on real-time parameter feedback according to claim 1, characterized in that: The post-processing and sizing unit performs fine processing on the vulcanized tube blank: the flash is removed by an online deburring knife set, and then the tube blank is quickly sized in a low-temperature water tank at 1-5℃ for 30-60min.

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