Distribution line mixed pillar porcelain insulator injection molding whole process optimization method and on-line monitoring method

Abstract

The invention relates to a distribution line mixed pillar porcelain insulator injection molding whole process optimization method and an on-line monitoring method, and belongs to the field of mixed pillar porcelain insulator injection molding process optimization. As the mixed insulator is a new product, research on the compounding process of the high-temperature vulcanized silicone rubber and the porcelain piece is less at present. How to effectively compound high-temperature vulcanized silicone rubber and a mixed porcelain post insulator to obtain an optimal forming process of a novel mixed porcelain post insulator is a key point of consideration. Glue injection simulation analysis and online monitoring of the actual glue injection process are combined, comprehensive analysis is carried out on the composite process of the mixed insulator, and therefore the most suitable injection scheme is obtained. According to the method, the problem of determining important parameters in the whole process of injecting the high-temperature vulcanized silicone rubber on the surface of the porcelain part is solved, and the problems of actual feedback and dynamic adjustment in the rubber injection process are also solved.

Description

Technical Field

[0001] The invention belongs to the field of injection molding process optimization of hybrid pillar porcelain insulators, and relates to a whole-process optimization method and an online monitoring method for injection molding of hybrid pillar porcelain insulators for distribution lines. Background Art

[0002] There are many pole-mounted transformers in the distribution network, and the insulation isolation components of their inlet and outlet lines are usually pillar porcelain insulators. Pillar porcelain insulators need to meet the requirements of both electrical insulation performance and mechanical performance during operation. In terms of electrical performance, the insulators are required to withstand the effects of working voltage, transient operating overvoltage and lightning overvoltage, and no serious accidents such as insulation breakdown, flashover, and damage will occur. In terms of mechanical performance, the insulators are required to be able to withstand long-term mechanical loads and have a good ability to withstand sudden external forces such as hurricanes and earthquakes. At the same time, pillar porcelain insulators must also ensure the stability and reliability of their work under various severe meteorological conditions such as frost, rain, snow, wind, sun, extreme heat and severe cold.

[0003] In order to improve the pollution flashover resistance of the porcelain insulators of the distribution network line pillars, the common corresponding method is to apply RTV coating on the surface of the porcelain pillar insulators, or use composite pillar porcelain insulators, which are composed of an inner insulating core rod bonded to an outer insulator silicone rubber shed, to improve the surface hydrophobicity and effective creepage distance of the shed. However, under heavy pollution conditions, the RTV coating is prone to peeling and falling off after long-term operation. The silicone rubber material has poor adhesion to the porcelain core, which will cause interface problems. In severe cases, there will be serious accidents such as internal insulation breakdown failure and core rod breakage.

[0004] The new hybrid post porcelain insulator uses a complete porcelain insulator as the inner core, providing reliable and stable mechanical properties, excellent aging resistance and long service life. Porcelain insulators are complete, independent and mature products with perfect product standards and rich operating experience. The high-temperature vulcanized silicone rubber umbrella sleeve coated by one-time injection molding also has a certain protective effect on the internal porcelain insulation parts, but it does not need to meet the strict requirements of the umbrella sleeve of the composite post porcelain insulator for the protection of the core rod. Even if the covering umbrella sleeve is damaged and the porcelain insulation parts are in direct contact with the atmospheric environment, as long as it is not a large-scale damage, it will not affect the anti-pollution flashover function, and there is no worry about serious mechanical and electrical failures.

[0005] How to effectively compound high-temperature vulcanized silicone rubber and hybrid porcelain post insulators to obtain the best molding process for new hybrid post porcelain insulators is a key consideration. The new hybrid post porcelain insulator is a newly designed insulator product that compounds porcelain and high-temperature vulcanized silicone rubber together. During manufacturing, high-temperature vulcanized silicone rubber needs to be injected into the surface of the post porcelain. At present, there are some studies on the injection technology of composite insulators, which are compounded by high-temperature vulcanized silicone rubber on epoxy resin, which is the connection between organic and organic, but this cannot be directly applied to hybrid insulators, that is, organic and inorganic. There are also a small number of studies analyzing the injection process of hybrid insulators, and simulating the injection scheme with the smallest stress peak, but this does not determine the specific parameters such as injection speed, initial injection temperature and gate position, and fails to consider the whole process of filling, flow and curing. And the results of simulation optimization cannot be intuitively fed back in the actual injection molding process. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that the existing experience is insufficient and the injection molding process of hybrid porcelain post insulators needs to be explored and tried, the direction is unclear, the effect cannot be quantified, and it is time-consuming and labor-intensive. Therefore, a method for optimizing the whole process of injection molding of hybrid porcelain post insulators for distribution lines and an online monitoring method are provided. The injection simulation analysis is combined with the online monitoring of the actual injection process, and the composite process of the hybrid insulator is comprehensively analyzed to obtain the most suitable injection scheme. This method makes up for the problem of determining important parameters in the whole process of injecting high-temperature vulcanized silicone rubber on the surface of the porcelain part, and also solves the problem of actual feedback and dynamic adjustment during the injection process.

[0007] To achieve the above object, the technical solution of the present invention is: a method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for distribution lines, comprising: S1. Design the basic model of hybrid porcelain post insulators for distribution lines, design the hybrid porcelain post insulators to have a uniform six-umbrella structure, and design the thickness of the high-temperature vulcanized silicone rubber coating; S2. Injection speed optimization: The injection speed was 15 cm 3 / s, 20 cm 3 / s, 25 cm 3 / s, 30 cm 3 / s four speeds to simulate the injection molding process of hybrid porcelain post insulators; at the same time, keep the injection mold surface temperature at 125°, the melt temperature at 50°, select "start holding pressure from %99 filling volume", and obtain the effect of injection speed on the injection pressure, clamping force, viscosity and solidification degree, and select the best injection speed for hybrid porcelain post insulators of distribution lines; S3. Initial mold temperature optimization: The injection molding process of hybrid porcelain post insulators was simulated using four mold temperatures of 105°, 115°, 125°, and 135°, respectively. The injection speed was set to 20 cm 3 / s, the melt temperature is set to 50°, and "holding pressure from %99 filling volume" is selected to obtain the influence rules including viscosity, node conversion and average solidification degree, injection pressure, and clamping force, and select the optimal mold temperature for the hybrid pillar porcelain insulator of the distribution line; S4. Gate location optimization: With an injection speed of 20 cm 3 / s speed to simulate the injection molding process of hybrid porcelain post insulators. At the same time, the surface temperature of the injection mold is maintained at 125°, the melt temperature is set to 50°, and "holding pressure from %99 filling volume" is selected; based on the hybrid porcelain post insulator with uniform six-umbrella structure, the space between different umbrellas is selected as the gate position, and the influence of each gate position on the injection pressure and clamping force is comprehensively analyzed to select the optimal gate position.

[0008] In one embodiment of the present invention, in step S1, the specific implementation method of designing the basic model of the hybrid porcelain post insulator of the distribution line is: First, the high-temperature vulcanized silicone rubber surface of the hybrid porcelain post insulator was extracted using CAD and imported into Moldflow. The double-face mesh type was selected, and the global side length of the mesh of the high-temperature vulcanized silicone rubber was divided into 1mm. A dual-runner system was used, that is, the injection and coating of the surfaces of two hybrid porcelain post insulators were completed at the same time. The cold main runner width was selected as 14mm and the cold runner width was selected as 12mm. After dividing the runner system, the runner system was also meshed, and the global side length of the runner mesh was divided into 2mm. Next, define the material properties. The high-temperature vulcanized silicone rubber to be coated must meet the following requirements: the melt temperature before injection is about 50 degrees, the melt density is 1.5 g / cm3, and the mold surface temperature needs to be around 120 degrees. Search the material library for the material that is closest to the conditions that high-temperature vulcanized silicone rubber needs to meet as the injection material, and modify the melt temperature and density in the material details. Set the mold surface temperature to 125 degrees, the melt temperature to 50 degrees, and the flow rate of the filling control to 20 cm 3 / s; Select "Speed / pressure switching is set to 'filling by %99 volume'", that is, start holding pressure from %99 volume; Select "Reaction molding" in molding mode.

[0009] In one embodiment of the present invention, in step S1, the injection material is Sillicone rubber produced by the manufacturer Fillcalc V Import.

[0010] In one embodiment of the present invention, in step S2, the influence of injection speed on the values ​​of injection pressure, clamping force, viscosity and curing degree is obtained through Moldflow analysis log.

[0011] In one embodiment of the present invention, in step S3, the influence rules including viscosity, node conversion and average degree of solidification, injection pressure and clamping force are obtained through the analysis log of Moldflow.

[0012] In one embodiment of the present invention, in step S4, the gate positions include: ① between 2 umbrellas and 3 umbrellas on one side, ② between 4 umbrellas and 5 umbrellas on one side, ③ between 2 umbrellas and 3 umbrellas on one side, and between 4 umbrellas and 5 umbrellas on the other side at 180°; ④ at the middle position between 3 umbrellas and 4 umbrellas on both sides at 180°; ⑤ between 2 umbrellas and 3 umbrellas on one side, rotated 90° to between 4 umbrellas and 5 umbrellas on the other side.

[0013] The present invention also provides an online monitoring method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for distribution lines. Based on the above-mentioned method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for distribution lines, an ultrasonic online monitoring platform is built to monitor the whole process of injection molding of high-temperature vulcanized silicone rubber.

[0014] In one embodiment of the present invention, the ultrasonic online monitoring platform includes: a computer equipped with ultrasonic acquisition software, an ultrasonic detection card connected to the computer via a PCI bus, and an ultrasonic probe connected to the ultrasonic detection card and used to collect ultrasonic signals of the entire process of injection molding of a hybrid pillar porcelain insulator for a distribution line as described above.

[0015] In one embodiment of the present invention, the ultrasound acquisition software includes a driver program of an ultrasound card and an ultrasound acquisition application program.

[0016] In one embodiment of the present invention, the working mode of the ultrasonic online monitoring platform is as follows: the ultrasonic acquisition card is driven by a computer to generate an electrical signal, which drives the ultrasonic probe to generate an ultrasonic signal. The ultrasonic signal is reflected and transmitted by the upper and lower templates and the hybrid support porcelain insulator, and converted back to a signal to the ultrasonic acquisition card. After processing, a series of ultrasonic waveforms are obtained in the computer, which are displayed in real time and stored in the computer in real time.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the present invention combines the injection simulation analysis with the online monitoring of the actual injection process, and conducts a comprehensive analysis of the composite process of the hybrid insulator, thereby obtaining the most suitable injection scheme. The present invention makes up for the problem of determining important parameters in the whole process of injecting high-temperature vulcanized silicone rubber on the surface of the porcelain part, and also solves the problem of actual feedback and dynamic adjustment in the injection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1Determine the injection molding optimization map of hybrid post porcelain insulators for mold filling analysis.

[0019] Figure 2 Optimization diagram for injection time of hybrid post porcelain insulator.

[0020] Figure 3 This is the clamping force optimization diagram for hybrid post porcelain insulators.

[0021] Figure 4 It is a schematic diagram of the ultrasonic online monitoring platform of the present invention. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings.

[0023] The present invention provides a method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for distribution lines and an online monitoring method, which combines injection simulation analysis with online monitoring of the actual injection process, and conducts a comprehensive analysis of the composite process of the hybrid insulator, thereby obtaining the most suitable injection scheme. This method makes up for the problem of determining important parameters in the whole process of injecting high-temperature vulcanized silicone rubber on the surface of porcelain parts, and also solves the problem of actual feedback and dynamic adjustment in the injection process.

[0024] The following is the specific implementation process of the present invention.

[0025] Moldflow simulation is superior in improving product quality and reducing production costs. Before mold processing, problems such as melt filling and pressure holding can be predicted so that designers can find problems more easily. During the injection molding process, an ultrasonic online monitoring platform is built to monitor it online, so that the curing process of liquid silicone rubber at different temperatures can be more intuitively seen.

[0026] The present application discloses a method for optimizing the whole process of injection molding of hybrid porcelain post insulators for distribution lines and an online monitoring method based on Moldflow, aiming to solve the problems of insufficient experience, need for trial and error in the injection molding process of hybrid porcelain post insulators, unclear direction, unquantifiable results, and time-consuming and labor-intensive process.

[0027] The technical solution provided by the present invention is as follows: First, as Figure 1-3 As shown, the present application provides a method for optimizing the injection molding process of a hybrid porcelain post insulator based on Moldflow, and analyzes the influence of process parameters such as speed and mold temperature on the entire injection molding process. The method comprises the following steps: Firstly, the basic model of the hybrid porcelain post insulator for distribution lines was designed. Considering that it needs to be coated with high-temperature vulcanized silicone rubber, it is designed as a uniform six-umbrella structure. In addition, considering that the high-temperature vulcanized silicone rubber should not be too thick for economic reasons, but should not be too thin due to the influence of process deviations, the thickness of the high-temperature vulcanized silicone rubber is designed to be about 3cm.

[0028] First, the silicone rubber surface of the hybrid porcelain post insulator is extracted using CAD and imported into Moldflow. Since the surface of the post porcelain insulator is coated with a layer of high-temperature vulcanized silicone rubber of about 3 cm, in order to take into account both calculation accuracy and speed, a double-face mesh type is selected. Considering details such as corners, the global edge length of the mesh of the high-temperature vulcanized silicone rubber is divided into 1 mm. Considering efficiency issues, a dual-runner system is adopted, that is, the injection and coating of the surfaces of two hybrid porcelain post insulators are completed at the same time. The cold main runner width is selected as 14 mm and the cold runner width is selected as 12 mm. After dividing the runner system, the runner system is also meshed. Similarly, considering accuracy issues, the global edge length of the runner mesh is divided into 2 mm. Next, the material properties are defined. The set coated high-temperature vulcanized silicone rubber needs to meet two conditions: one is that the melt temperature before injection is about 50 degrees, and the other is that the melt density is 1.5 g / cm 3 , the mold surface temperature needs to be around 120°. In order to meet the above three conditions, search for the material with the closest parameters in the material library. The result shows Silliconerubber produced by the manufacturer Fillcalc V Import. Therefore, it is used as the injection material, and the melt temperature and density are modified in the material details; in the "Process Settings", the mold surface temperature is set to the required value of 125°, the melt temperature is set to 50°, and the flow rate of the filling control is set to 20 cm 3 / s; Considering that high temperature vulcanized silicone rubber is a thermosetting material, select "Speed / pressure switching set to 'Filling by %99 volume'", that is, start holding pressure from %99 filling volume; also considering that it is a thermosetting material, select "Reaction Molding" in the molding mode on the home page.

[0029] Optimization of injection speed: Reason: Injection speed will affect the injection pressure, clamping force, injection time, liquid silicone rubber viscosity and curing degree. When the speed is high, it is easy to cause flash and even product defects. It may also involve gas during the injection process, forming bubbles inside the product, and it is not conducive to exhaust, causing gas entrainment. The entrained gas may even cause scorch under high temperature and high pressure, causing defects to the product. If the speed is too low, it will also have an adverse effect. Liquid silicone rubber is a thermosetting material. The mold is often heated during the injection process. Heating usually reduces the viscosity of liquid silicone rubber. At the same time, heating will also cause some liquid silicone rubber to undergo a curing reaction, which in turn increases the viscosity of the rubber. When the injection speed is too low, it will definitely lead to a long filling time. At this time, the curing reaction will increase significantly, causing the viscosity to eventually increase, so that the filling pressure is too high to fill. The filling rate is too low and the shear rate is too small. According to the viscosity curve, the colloid viscosity is too large, which is not conducive to filling. Determining a reasonable injection speed is to find a suitable balance between injection pressure, clamping force, viscosity and curing degree. Studying the impact of speed on these four factors is a reliable basis for reasonably determining the injection speed increase.

[0030] Steps: Use injection speed of 15 cm 3 / s, 20cm 3 / s, 25cm 3 / s, 30cm 3 / s four speeds to simulate the injection molding process of hybrid porcelain post insulators; at the same time, keep the injection mold temperature at 125°, set the melt temperature to 50°, and select "start holding pressure from %99 filling volume". Moldflow's analysis diary can obtain the influence of injection speed on the injection pressure, clamping force, viscosity and solidification degree, so as to select the most suitable injection speed for hybrid porcelain post insulators of distribution lines.

[0031] Optimization of initial mold temperature: Reason: Since liquid high-temperature silicone rubber is a thermosetting material, in order to prevent air from being entrapped during the process, the injection speed is slow and the injection time is long, so the mold temperature needs to be controlled during injection. Therefore, it is usually necessary to perform injection molding at a lower temperature, and then raise the mold temperature for heating and curing after the injection is completed. If the mold temperature is too low during injection, the melt fluidity will deteriorate, which will increase the injection pressure and the clamping force. If the mold temperature is too high, the liquid silicone rubber will undergo a curing reaction under the action of heating, which will increase the melt viscosity and injection pressure. It may also cause the flow front and the poor flow area to solidify first, resulting in serious asynchronous curing of various areas of the insulator, forming residual stress in the product, and uneven curing leading to local under-vulcanization. Study the effect of initial mold temperature on the injection molding process, determine the initial mold temperature, and explore the influence of mold temperature on viscosity, node conversion and average degree of curing, injection pressure, clamping force, etc.

[0032] Steps: Use mold temperatures of 105°, 115°, 125°, and 135° to simulate the injection molding process of hybrid porcelain post insulators, and set the injection speed to 20ccm. 3 / s, the melt temperature is set to 50°, and "holding pressure from %99 filling volume" is selected. Moldflow's analysis diary can obtain the influencing rules of viscosity, node conversion and average solidification degree, injection pressure, clamping force, etc., so as to select the most suitable mold temperature for the hybrid pillar porcelain insulator of the distribution line.

[0033] Gate location optimization: Reason: The gate position will also affect the injection pressure, clamping force and product quality. Consider setting the gate position at different positions on the end of the insulator.

[0034] Steps: Use an injection speed of 20cm 3 / s speed to simulate the injection molding process of hybrid porcelain post insulators. At the same time, the injection mold temperature is kept at 125°, the melt temperature is set to 50°, and "holding pressure from %99 filling volume" is selected. The original gate position is set between the 2nd and 3rd umbrellas and between the 4th and 5th umbrellas on the same side. In order to select the most suitable gate position, three other situations are considered: ① between the 2nd and 3rd umbrellas on one side, and between the 4th and 5th umbrellas on the other side at 180°; ② between the 3rd and 4th umbrellas on both sides at 180° (middle position); and 3rd between the 2nd and 3rd umbrellas on one side, rotated 90° to between the 4th and 5th umbrellas on the other side. Comprehensively analyze the influence of the gate position on the injection pressure and clamping force, and select the most suitable gate position.

[0035] Second, as Figure 4 As shown, the present application also provides an online monitoring method, which builds an ultrasonic online monitoring platform to monitor the entire injection molding process of high temperature vulcanized silicone rubber. The method comprises the following steps: refer to Figure 4 , which is a diagram of the whole process of ultrasonic monitoring of hybrid pillar porcelain insulator injection molding. 1 is the ultrasonic probe, 2 is the ultrasonic detection card, 3 is the PCI bus, 4 is the computer, and 5 is the ultrasonic acquisition software. The ultrasonic monitoring test platform is built, which consists of ultrasonic hardware system, data acquisition software and computer. The hardware platform includes mold, ultrasonic probe selection and connection, and ultrasonic acquisition card selection and installation. The software platform is the driver part, which specifically includes two parts: the ultrasonic card driver and the ultrasonic acquisition application.

[0036] The ultrasonic acquisition card is driven by a computer to generate an electrical signal to drive the ultrasonic signal. The ultrasonic signal is reflected and transmitted through the upper and lower templates and the sample interface, and then converted back to the ultrasonic acquisition card. After processing, a series of ultrasonic waveforms are obtained on the computer; the software platform uses programming codes to realize the functions of ultrasonic signal emission, display, storage and processing. The overall process is: 2 is driven by 4, and ultrasonic waves are emitted every 100ms, and the signal is transmitted to 1. After the signal is refracted and reflected by the mold and the hybrid pillar porcelain insulator, 5 finally displays the waveform of each cycle in real time, and 4 stores the data in real time.

[0037] The above are preferred embodiments of the present invention. Any changes made according to the technical solution of the present invention, as long as the resulting functions do not exceed the scope of the technical solution of the present invention, belong to the protection scope of the present invention.

Claims

1. A method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for distribution lines, characterized in that: include: S1. Design the basic model of hybrid porcelain post insulators for distribution lines, design the hybrid porcelain post insulators to have a uniform six-umbrella structure, and design the thickness of the high-temperature vulcanized silicone rubber coating; S2. Injection speed optimization: The injection speed was 15 cm 3 / s, 20 cm 3 / s, 25 cm 3 / s, 30 cm 3 / s four speeds to simulate the injection molding process of hybrid porcelain post insulators; at the same time, keep the injection mold surface temperature at 125°, the melt temperature at 50°, select "start holding pressure from %99 filling volume", and obtain the effect of injection speed on injection pressure, clamping force, viscosity and solidification degree, and select the best injection speed for hybrid porcelain post insulators of distribution lines; S3. Initial mold temperature optimization: The injection molding process of hybrid porcelain post insulators was simulated using four mold temperatures of 105°, 115°, 125°, and 135°, respectively. The injection speed was set to 20 cm 3 / s, the melt temperature is set to 50°, and "holding pressure from %99 filling volume" is selected. The influence rules including viscosity, node conversion and average solidification degree, injection pressure, and clamping force are obtained, and the optimal mold temperature of the hybrid pillar porcelain insulator for distribution lines is selected; S4. Gate location optimization: With an injection speed of 20 cm 3 / s speed to simulate the injection molding process of hybrid porcelain post insulators. At the same time, the surface temperature of the injection mold is kept at 125°, the melt temperature is set to 50°, and "holding pressure from %99 filling volume" is selected; based on the hybrid porcelain post insulator with uniform six-umbrella structure, the space between different umbrellas is selected as the gate position, and the influence of each gate position on the injection pressure and clamping force is comprehensively analyzed to select the optimal gate position.

2. The whole process optimization method of injection molding of hybrid pillar porcelain insulators for distribution lines according to claim 1 is characterized in that: In step S1, the specific implementation method of designing the basic model of the hybrid porcelain post insulator of the distribution line is: First, the high-temperature vulcanized silicone rubber surface of the hybrid porcelain post insulator was extracted using CAD and imported into Moldflow. The double-face mesh type was selected, and the global side length of the mesh of the high-temperature vulcanized silicone rubber was divided into 1mm. A dual-runner system was used, that is, the injection and coating of the surfaces of two hybrid porcelain post insulators were completed at the same time. The cold main runner width was selected as 14mm and the cold runner width was selected as 12mm. After dividing the runner system, the runner system was also meshed, and the global side length of the runner mesh was divided into 2mm. Next, define the material properties. The high-temperature vulcanized silicone rubber to be coated must meet the following requirements: the melt temperature before injection is about 50 degrees, the melt density is 1.5 g / cm3, and the mold surface temperature needs to be around 120 degrees. Search the material library for the material whose material parameters are closest to the conditions that high-temperature vulcanized silicone rubber needs to meet as the injection material, and modify the melt temperature and density in the material details. Set the mold surface temperature to 125°, the melt temperature to 50°, and the flow rate for fill control to 20 cm 3 / s; Select "Speed / pressure switching is set to 'filling by %99 volume'", that is, start holding pressure from %99 volume; Select "Reaction molding" in molding mode.

3. The whole process optimization method of injection molding of hybrid pillar porcelain insulators for distribution lines according to claim 1 is characterized in that: In step S1, the injection material used is Sillicone rubber produced by the manufacturer Fillcalc V Import.

4. The whole process optimization method of injection molding of hybrid pillar porcelain insulators for distribution lines according to claim 1 is characterized in that: In step S2, the influence of injection speed on the values ​​of injection pressure, clamping force, viscosity and curing degree is obtained through the analysis log of Moldflow.

5. The whole process optimization method of injection molding of hybrid pillar porcelain insulators for distribution lines according to claim 1 is characterized in that: In step S3, the influence rules including viscosity, node conversion and average degree of solidification, injection pressure and clamping force are obtained through the Moldflow analysis log.

6. The method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for power distribution lines according to claim 1, characterized in that: In step S4, the gate positions include: ① between 2 and 3 umbrellas on one side, ② between 4 and 5 umbrellas on one side, ③ between 2 and 3 umbrellas on one side, and between 4 and 5 umbrellas on the other side at 180°; ④ in the middle position between 3 and 4 umbrellas on both sides at 180°; ⑤ between 2 and 3 umbrellas on one side, rotated 90° to between 4 and 5 umbrellas on the other side.

7. An online monitoring method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for distribution lines, characterized in that: Based on the method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for distribution lines as described in any one of claims 1 to 6, an ultrasonic online monitoring platform is built to monitor the whole process of injection molding of high-temperature vulcanized silicone rubber.

8. The online monitoring method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for power distribution lines according to claim 7 is characterized in that: The ultrasonic online monitoring platform includes: a computer equipped with ultrasonic acquisition software, an ultrasonic detection card connected to the computer via a PCI bus, and an ultrasonic probe connected to the ultrasonic detection card and used to collect ultrasonic signals of the entire injection molding process of a hybrid support porcelain insulator for a distribution line as described in any one of claims 1-6.

9. The online monitoring method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for power distribution lines according to claim 8 is characterized in that: Ultrasound acquisition software includes the ultrasound card driver and ultrasound acquisition application.

10. The online monitoring method for optimizing the whole process of injection molding of hybrid pillar porcelain insulators for power distribution lines according to claim 8, characterized in that: The working mode of the ultrasonic online monitoring platform is as follows: the ultrasonic acquisition card is driven by a computer to generate an electrical signal, which drives the ultrasonic probe to generate an ultrasonic signal. The ultrasonic signal is reflected and transmitted by the upper and lower templates and the hybrid pillar porcelain insulator, and converted back to a signal to the ultrasonic acquisition card. After processing, a series of ultrasonic waveforms are obtained in the computer, which are displayed in real time and stored in the computer in real time.

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