Three-post insulator mold and forming system

Abstract

The invention relates to a three-post insulator mold and a forming system, and belongs to the technical field of power transmission and transformation insulator forming. The mold comprises a mold body, the mold body comprises a mold main body and a central insert, a high-energy acoustic beam unit is arranged on the inner cylinder wall of the central insert, and the high-energy acoustic beam unit is used for being externally connected with a multi-channel converter so that the potential energy field of a pouring material in the curing process in the mold can be changed through acoustic waves output by the high-energy acoustic beam unit. The high-energy sound beam unit used for being externally connected with the multi-channel converter is arranged on the inner cylinder wall of an existing center insert, so that the potential energy field of a pouring material in the curing process in the mold is changed through sound waves output by the high-energy sound beam unit; and the propagation of sound waves, the microcosmic movement rule of material molecules and the solidification rule of the pouring part are all carried out from inside to outside, so that the possibility of stress residue during solidification molding of the pouring material in the mold is reduced, and the residual stress in the pouring body is eliminated.

Description

Technical Field

[0001] The invention relates to a three-pillar insulator mould and a forming system, belonging to the technical field of power transmission and transformation insulation component forming. Background Art

[0002] The main raw materials of ultra-high voltage transmission and transformation insulation parts are generally epoxy resin / alumina composite materials. During the casting process, due to the influence of various factors, the insulation parts are prone to internal stress during the curing process. Practice has proved that internal stress is the main reason for microcracks, gaps, and strength reduction in epoxy resin castings. When the internal stress is large, composite components frequently suffer mechanical damage and insulation failure under operating conditions, which in turn causes system power outages, quenching, and even fires caused by power failures. Especially for three-pillar insulators, due to their irregular shape, complex component shapes, multiple cross-sections, and easy stress concentration during the molding process, which ultimately leads to quality problems such as deformation and cracking of the insulators.

[0003] The traditional method to eliminate residual stress is heat treatment, but the heat treatment process is prone to oxidation of the workpiece surface, changes in hardness and strength, high energy consumption and low efficiency. Therefore, how to regulate the curing stress distribution state of insulating parts and eliminate residual stress is a difficult problem that needs to be solved urgently.

[0004] Experiments have shown that the temperature requirements for epoxy resin curing process are relatively strict. The temperature during the curing process will directly affect the quality of the insulator curing. Due to the rapid cooling of the thick section, the solidification rate of the composite material surface is significantly faster than the core. The subsequent cooling will cause the core to solidify and shrink. The shrinkage of the core is restricted by the already solidified outer layer, forming tensile residual stress in the center of the component and large compressive stress near the surface.

[0005] As a key tool for epoxy casting molding, the mold plays a vital role in the quality of epoxy castings. The structure of the mold ensures the shape and size of the epoxy casting. When the mold structure is constant, the temperature field distribution of the mold determines the quality of the epoxy casting. For a mold with a certain structure, the heating method determines the distribution of its temperature field. At present, when the insulating part is cured, the insulating part mold is placed in an oven, and the oven provides a heating environment for the curing reaction of the insulating part. The temperature provided by the oven is relatively constant, but the constant temperature environment is not conducive to the release of stress in the insulating part. Therefore, the epoxy casting still has residual stress after curing.

[0006] The invention patent application with publication number CN114505991A discloses a three-pillar insulator casting mold and internal stress elimination method. In the curing process of the three-pillar insulator, the ultrasonic transducer is used to inject ultrasonic waves into the column legs for a preset time to release the internal stress generated during the curing process of the column legs, effectively reduce the internal stress of the column legs, and improve the mechanical strength of the insulator column legs. The scheme uses the propagation of ultrasonic waves and the microscopic movement of material molecules to weaken the intermolecular force to eliminate the internal stress generated inside the casting body. However, since the ultrasonic transducer is arranged in the column leg area of ​​the mold, its propagation and microscopic movement are carried out from the outside to the inside, which is opposite to the curing law from the inside to the outside, and the effect is relatively poor, and residual stress may still exist inside the casting body. Summary of the invention

[0007] The purpose of the present invention is to provide a three-pillar insulator mold to solve the problem of residual stress when the cast body is solidified in the existing mold; and also to provide a molding system to solve the problem of residual stress when the cast body is solidified in the mold in the existing molding system.

[0008] To achieve the above object, the solution of the present invention includes: A three-pillar insulator mold of the present invention includes a mold body, which includes a mold main body and a central insert. A high-energy sound beam unit is arranged on the inner wall of the tube of the central insert. The high-energy sound beam unit is used to externally connect a multi-channel converter to change the potential energy field of the casting material in the solidification process in the mold through the sound waves output by the high-energy sound beam unit.

[0009] Further, the mold body has three column legs, and the high-energy sound beam unit is arranged on the central axis extending from the column legs.

[0010] Furthermore, the high-energy sound beam units are evenly distributed on the inner wall of the cylinder along the axial direction and / or along the circumferential direction.

[0011] Furthermore, the inner wall of the mold body is covered with a heating plate, the inner cavity of the mold covered with the heating plate has the same shape as the inner cavity of the mold body, and the heating plate is controlled and connected to a temperature control system; The temperature control system is used to control the heating temperature of the heating plate to heat the casting material in contact with the inner wall of the heating plate in real time according to the temperature change of the casting material during the curing process of the casting material in the mold cavity, so that the difference between the temperature of the outer surface of the casting material and the temperature inside the casting material is always maintained at 0 to 3°C.

[0012] Furthermore, the temperature in the casting material is the temperature of the casting material at the center position in the mold.

[0013] Furthermore, the heating plate is also used to preheat the three-pillar insulator mold before pouring the casting material into the mold.

[0014] Furthermore, a protective layer is also covered on the heating sheet. The protective layer is used to prevent the heating sheet from overheating and the casting material from adhering to the protective layer. The inner cavity of the mold covered with the protective layer has the same shape as the inner cavity of the mold body.

[0015] Furthermore, the temperature control system is used to separately control the heating temperatures at different positions on the heating sheet.

[0016] A molding system includes a three-pillar insulator mold, and the three-pillar insulator mold adopts the three-pillar insulator mold as described above.

[0017] Furthermore, an oven or an incubator is also included. The oven is also used to preheat the mold before pouring the casting material into the three-pillar insulator mold, and the three-pillar insulator mold is placed in the incubator during the casting and curing stage.

[0018] Advantages of the present invention: The present invention is an improved invention, which provides a three-pillar insulator mold. Specifically, a high-energy acoustic beam unit for externally connecting a multi-channel converter is arranged on the inner wall of the cylinder of the existing central insert, so as to change the potential energy field of the casting material in the mold during the curing process through the sound waves output by the high-energy acoustic beam unit, so that the propagation of the sound waves, the law of the microscopic movement of the material molecules, and the curing law of the casting are all from the inside to the outside, reducing the possibility of residual stress during the curing and forming of the casting material in the mold, and realizing the elimination of the residual stress in the casting body. Description of the drawings

[0019] Figure 1 is a schematic structural diagram of the mold body of the three-pillar insulator mold; Figure 2 is a schematic structural diagram of the central insert; Figure 3 is a schematic structural diagram of the molding system.

[0020] Description of the reference numerals: 1. Central insert; 11. Protective layer; 12. Heating sheet; 13. Mold layer; 2. Mold body; 3. High-energy acoustic beam unit; 4. Incubator. Specific embodiments

[0021] To solve the problems in the background art, the present invention uses the propagation of ultrasonic waves and the microscopic movement of material molecules to weaken the intermolecular force, and makes the laws of propagation and microscopic movement as consistent as possible with the curing law of the casting, reducing the possibility of residual stress during the curing and forming of the casting material in the mold, and realizing the elimination of the residual stress in the casting body.

[0022] To make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments.

[0023] An embodiment of a forming system: A forming system includes a three - pillar insulator mold.

[0024] Among them, a three - pillar insulator mold, such as Figure 1 shown, includes a mold body. The mold body includes a mold main body 2 and a central insert 1. Refer to Figure 2 and Figure 3 . On the inner wall of the cylinder of the central insert 1, a high - energy acoustic beam unit 3 is provided. The high - energy acoustic beam unit 3 is used to externally connect a multi - channel converter, so as to change the potential energy field of the casting material in the mold during the curing process through the sound waves output by the high - energy acoustic beam unit 3, and make the propagation of the sound waves, the law of the microscopic movement of the material molecules, and the curing law of the casting all proceed from the inside to the outside, reducing the possibility of residual stress during the curing and forming of the casting material in the mold, and realizing the elimination of the residual stress in the casting body. In the present invention, the high - energy acoustic beam unit 3 outputs ultrasonic waves to the casting material in the three - pillar insulator mold during the curing process to change the potential energy field of the casting material in the mold. The ultrasonic waves of this solution propagate from the inside to the outside in the three - pillar insulator casting body. The ultrasonic waves act on the material molecules inside the casting body, which can cause the material molecules inside the casting body to have microscopic movement, thereby weakening the force between molecules and releasing the internal stress generated during the curing of the casting in the mold, and effectively reducing the internal stress generated inside the casting body.

[0025] Specifically, the mold main body 2 has three column legs. The high - energy acoustic beam unit 3 is arranged on the central axis extending from any one of the three column legs or on the central axes extending from any two of the three column legs or on the central axes extending from all three column legs, so that the sound waves or high - energy acoustic beams extend from the inside to the outside in the casting in the mold, further improving the ability to reduce the internal stress generated inside the casting body.

[0026] Among them, the number of the high - energy acoustic beam units 3 can be 1, 2, 3 or even more, and is specifically selected according to needs.

[0027] When the high - energy acoustic beam unit 3 is arranged on the central axis extending from any one column leg of the mold main body 2, the number of the high - energy acoustic beam units 3 is 1 or 2; when the high - energy acoustic beam unit 3 is arranged on the central axes extending from any two column legs of the mold main body 2, the number of the high - energy acoustic beam units 3 is 2, 3 or 4; when the high - energy acoustic beam unit 3 is arranged on the central axes extending from the three column legs of the mold main body 2, that is, on the central axes extending from all column legs, the number of the high - energy acoustic beam units 3 is 3, 4, 5 or 6. When the high - energy acoustic beam unit 3 is arranged on the central axes extending from the three column legs of the mold main body 2 and the number of the high - energy acoustic beam units 3 is 3, as Figure 3 shown.

[0028] Specifically, the high-energy beam units 3 are uniformly distributed along the axial direction and / or circumferentially on the inner wall of the cylinder of the central insert 1.

[0029] When the high-energy beam units 3 are only uniformly distributed along the axial direction on the inner wall of the cylinder of the central insert 1, the sound waves or high-energy beams can be relatively uniformly distributed in the casting body within the mold to a certain extent, so as to further improve the ability to reduce the internal stress generated inside the casting body.

[0030] When the high-energy beam units 3 are only uniformly distributed along the circumferential direction on the inner wall of the cylinder of the central insert 1, referring to Figure 2 and Figure 3 , the sound waves or high-energy beams can be relatively uniformly distributed in the casting body within the mold to a certain extent, so as to further improve the ability to reduce the internal stress generated inside the casting body.

[0031] When the high-energy beam units 3 are uniformly distributed along both the axial direction and the circumferential direction on the inner wall of the cylinder of the central insert 1, the sound waves or high-energy beams can be uniformly distributed in the casting body within the mold to a greater extent, improving the ability to reduce the internal stress generated inside the casting body.

[0032] Among them, when the number of high-energy beam units 3 is 2, 3 or more, uniform distribution is considered, and the specific selection can be made according to the actual situation.

[0033] Specifically, a heating sheet 12 is covered on the inner wall of the mold body, that is, both the mold body 2 and the central insert 1 are covered with the heating sheet 12. The inner cavity of the mold covered with the heating sheet 12 has the same shape as the inner cavity of the mold body. The heating sheet 12 is controllably connected to a temperature control system. The two-layer structure of the wall layer of this three-pillar insulator mold from the outside to the inside is the mold layer 13 where the mold body is located and the heating layer where the heating sheet 12 is located.

[0034] Among them, the temperature control system is used to, during the curing process of the casting material in the inner cavity of the mold, according to the temperature change of the casting material during the curing process, control in real time the heating temperature of the heating sheet for heating the casting material in contact with the inner wall of the heating sheet, so that the difference between the temperature on the outer surface of the casting material and the temperature inside the casting material is always maintained between 0 and 3 °C.

[0035] The temperature control system includes a temperature sensor, a control circuit, and a relay. The temperature sensor is used to detect the temperature of the inner wall of the mold body in real time and convert the temperature signal into an electrical signal; the control circuit is used to receive the electrical signal output by the temperature sensor, process and analyze the signal, and determine whether the temperature of the inner wall of the current mold body is within the set temperature range. The set temperature range is set according to the change of the internal temperature of the casting material in the mold body during the curing process. If the temperature of the inner wall of the current mold body is lower than the lower limit of its corresponding set temperature range, the control circuit issues a corresponding control signal according to a preset program, and the relay controls the heating element to start heating according to the control signal to increase the temperature of the inner wall of the mold body. The control circuit continuously monitors the temperature change of the inner wall of the mold body through the temperature sensor and adjusts the control strategy according to the feedback information to ensure that the temperature of the inner wall of the mold body is always stable within the changing set temperature range. The temperature control system can also adopt other existing temperature control systems.

[0036] Of course, the heating element can also be used to preheat the three-pillar insulator mold before pouring the casting material into it, so as to reduce the influence of the mold body temperature, which is lower than the temperature of the casting material in the curing stage, on the curing of the casting material.

[0037] Among them, the actual heating area of the heating element can completely cover the inner wall of the mold body to optimize the heating efficiency. Of course, the actual heating area of the heating element can also be spaced and evenly distributed by using heat conduction.

[0038] Considering the uneven temperature distribution in the casting body, the uneven distribution is specifically manifested as a higher temperature at the central position, that is, the temperature is lower towards the outer side. The reason for the formation of stress is that the internal and external thermal expansion coefficients of the casting body in the mold during the curing stage are inconsistent. Therefore, the temperature of the casting material at the central position in the mold is taken as the temperature of the casting material in the three-pillar insulator mold to ensure that the temperature difference between the outer surface of the casting body formed by the casting material in the three-pillar insulator mold and the temperature at the central position of the casting body is always maintained between 0 and 3 °C.

[0039] Among them, the central position of the casting body is around the central cylinder of the three-pillar insulator, and can be specifically determined near the central insert of the three-pillar insulator mold. The temperature at the central position of the casting body can be obtained by collecting through a temperature sensor set at this central position.

[0040] As other embodiments, the temperature of the casting material in the three-pillar insulator mold can also be taken as the average temperature at multiple positions in the casting body. Of course, the temperature sensors can be set as needed.

[0041] Considering that the casting material is generally an epoxy resin / aluminum oxide composite material, to avoid the situation of the casting material sticking to the heating sheet, a protective layer 11 can be covered on the heating sheet 12. The protective layer 11 should have an anti-sticking function, and the protective layer 11 can also prevent the heating sheet 12 from overheating. The inner cavity of the mold covered with the protective layer 11 has the same shape as the inner cavity of the mold body to ensure that the addition of the heating sheet does not change the shape of the mold, and the adjustment of the mold size can be ignored or the mold specifications can be readjusted. Refer to Figure 2 and Figure 3 , the three-layer structure of the wall layer of the three-pillar insulator mold from the outside to the inside is the mold layer 13 where the mold body is located, the heating layer where the heating sheet 12 is located, and the protective layer 11.

[0042] Specifically, the temperature control system is used to separately control the heating temperature at different positions on the heating sheet, that is, the temperature control system can also separately control the heating temperature and heating time of the heating sheets covering different positions on the mold body, so as to adjust the heating temperature of the heating sheets at different positions according to actual needs.

[0043] Specifically, as Figure 3 shown, it also includes a heat preservation box 4. The mold body is placed in the heat preservation box 4 during the casting and curing stage to insulate the three-pillar insulator mold through the heat preservation box 4, so as to reduce the influence of the ambient temperature lower than the temperature of the casting material in the curing stage on the curing of the casting material. Of course, the heat preservation box 4 has the function of fixing the three-pillar insulator mold.

[0044] The heat preservation box 4 is also equipped with a temperature control system to keep the difference between the heat preservation temperature of the heat preservation box 4 and the temperature of the outer surface of the casting material at 0 to 3 °C at all times, ensuring heat preservation while not affecting the curing of the casting material. Of course, the heat preservation box 4 can also be used to preheat the mold before pouring the casting material into the three-pillar insulator mold, so as to reduce the influence of the temperature of the mold body lower than the temperature of the casting material in the curing stage on the curing of the casting material.

[0045] As other embodiments, it also includes an oven, and the oven is also used to preheat the mold before pouring the casting material into the three-pillar insulator mold, so as to reduce the influence of the temperature of the mold body lower than the temperature of the casting material in the curing stage on the curing of the casting material. Of course, the oven has the function of fixing the three-pillar insulator mold.

[0046] The three-pillar insulator mold of the present invention can be applied to the molding and stress regulation of epoxy cast three-pillar insulators for ultra-high and extra-high voltage switchgear, and can be specifically applied to the casting of three-pillar insulators with voltage levels such as 420 kV, 550 kV, 800 kV, and 1100 kV.

[0047] Taking the three-pillar insulator mold with heating and high-energy sound beams as an example, the following detailed description is given: The three-pillar insulator mold of the present invention can be used for stress regulation and gradient heating during the curing stage of the casting. Specifically, heating sheets are installed inside the mold, and in cooperation with the heat preservation device and the temperature control system, gradient heating is carried out on different parts of the insulator casting body to ensure the orderly curing of the insulator casting, and the temperature difference between the epoxy at the center position and the epoxy at the periphery of the three-pillar casting body is always maintained between 0 and 3 °C, avoiding cracking and other phenomena caused by different thermal expansion coefficients at the center position and the periphery; at the same time, a high-energy acoustic beam transducer and a multi-channel adapter head are installed at the center cylinder position of the mold, and the high-energy acoustic beam is used to change the internal potential energy field of the casting body, so as to release the stress generated during the curing process of the three-pillar insulator casting while heating the insulator, and solve the problems of mechanical damage and insulation failure caused by stress concentration due to uneven curing of the three-pillar insulator.

[0048] Among them, the mold is on the outermost side, the heating sheet is fixed in the middle by screws, and the protective layer is installed on the innermost side of the mold. The protective layer is used to prevent the heating sheet from overheating and thus avoid damaging the casting material. The high-energy acoustic beam transducer is fixed inside the central cylinder of the mold by screws and emits sound waves during the curing stage to remove stress from the insulator casting.

[0049] The three-pillar insulator mold is used to achieve stress regulation and self-heating during the curing stage of the casting. That is, the stress regulation and self-heating curing device using the three-pillar insulator mold includes a heat preservation box and a gradient heating mold (three-pillar insulator mold). The heat preservation box serves as a heat preservation system to maintain a relatively high ambient temperature; the gradient heating mold is divided into a mold layer (insulator forming mold), a heating layer and a protective layer, and the gradient heating mold ensures the orderly curing of the insulator casting. Among them, the mold layer is made of alloy steel to control the forming process of the three-pillar insulator casting; the heating layer uses silicon nitride ceramic heating sheets, and the temperature control system is used to achieve temperature regulation during the curing process of the three-pillar insulator; the protective layer uses a 0.4-mm polytetrafluoroethylene plastic film as an isolation layer to provide protection for the heating sheet. Among them, the shape of the heating sheet is designed to match the surface shape inside the mold. A heating wiring with heating function can be used, and different working times can be set for the power supply connected to each heating sheet, and an independent temperature control background can be set for each heating sheet to achieve individual control of the heating sheet; the local temperature during the curing process can be regulated through the insulator temperature control module as the temperature control system, and the operation is simple.

[0050] It also includes a multi-channel stress regulation module. The multi-channel stress regulation module includes ultrasonic power units with different powers, a multi-channel adapter and a high-energy acoustic beam transducer (high-energy acoustic beam unit). Among them, the number of high-energy acoustic beam transducers is 3, which are respectively placed on the inner wall of the central insert of the three-pillar insulator to release energy and achieve stress regulation and elimination during the curing process.

[0051] The specific usage steps of the stress-regulated self-heating curing device are as follows: 1) Preheat the inner cavity of the mold through the heating sheet before pouring; 2) Conduct pouring, and after the pouring is completed, fix the mold in the incubator; 3) Connect the high-energy sound beam unit to the multi-channel converter; 4) According to the general law of the curing reaction, set the heating time and heating temperature of the incubator and the gradient heating sheet in the insulator temperature control module; 5) The control system turns on the ultrasonic power unit, connects the ultrasonic power unit and the high-energy sound beam transducer through the multi-channel converter, and releases energy to the three-pillar insulator casting; 6) Turn on the temperature control system, regulate the temperature control system, and keep the temperature difference between the outer surface temperature and the central position temperature of the casting formed by the casting material in the three-pillar insulator mold at 0 to 3°C in real time; 7) After the curing is completed, open the oven and the mold, and take out the cured three-pillar insulator casting.

[0052] Among them, the heating time and heating temperature can be determined according to different epoxy resin formulations. Each formulation has its corresponding curing temperature and time. The heating sheet will increase the heating temperature and time for the epoxy resin that is relatively far from the metal insert (central insert) to enable uniform curing of the insulator casting.

[0053] In the present invention, by installing a heating sheet on the inner surface of the mold, configuring a heat preservation device and a temperature control system, gradient heating is carried out on different parts of the insulator casting to ensure the orderly curing of the casting. By changing the heating temperature of the heating sheet, the temperature difference between the central position and the peripheral epoxy of the three-pillar insulator is kept at 0 to 3°C at all times, which is beneficial to the release of internal stress in the insulator and avoids cracking and other phenomena caused by the different thermal expansion coefficients of the central position and the surface layer of the casting. The present invention also installs a high-energy sound beam transducer and a multi-channel adapter head at the position of the central cylinder (central insert) of the mold, and uses the high-energy sound beam to improve the stress concentration that occurs during the curing process of the three-pillar casting to eliminate the stress generated during the curing process of the three-pillar casting.

[0054] While heating the insulator casting, the present invention changes the potential energy field of the epoxy material of the casting through a high-energy sound beam, thereby overall regulating the stress of the insulator, solving the problem that the epoxy three-pillar insulator casting is not completely cured due to the too constant temperature field during the traditional oven curing process, improving the quality problems such as deformation and cracking of the insulating parts caused by residual stress, and improving the operation reliability of UHV power transmission and transformation equipment. The present invention can provide support for the reliability analysis and improvement of three-pillar insulators, can effectively reduce heat consumption, reduce the scrap rate, and improve product quality to ensure the operation reliability of UHV power transmission and transformation equipment, and is expected to save 2 million yuan in production costs and test costs every year.

[0055] An embodiment of a three-pillar insulator mold: A three-pillar insulator mold, the structure and the like of which have been described in detail in an embodiment of a forming system, will not be elaborated here.

Claims

1. A three-pillar insulator mold, comprising a mold body, wherein the mold body comprises a mold body and a center insert, characterized in that: A high-energy sound beam unit is arranged on the inner wall of the cylinder of the central insert, and the high-energy sound beam unit is used to connect an external multi-channel converter to change the potential energy field of the casting material in the curing process in the mold through the sound waves output by the high-energy sound beam unit.

2. The three-pillar insulator mold according to claim 1, characterized in that: The mold body has three column legs, and the high-energy sound beam unit is arranged on a central axis extending from the column legs.

3. The three-pillar insulator mold according to claim 1, characterized in that: The high-energy sound beam units are evenly distributed on the inner wall of the cylinder along the axial direction and / or along the circumferential direction.

4. The three-pillar insulator mold according to claim 1, characterized in that: The inner wall of the mold body is covered with a heating plate, the inner cavity of the mold covered with the heating plate has the same shape as the inner cavity of the mold body, and the heating plate is controlled and connected to a temperature control system; The temperature control system is used to control the heating temperature of the heating plate to heat the casting material in contact with the inner wall of the heating plate in real time according to the temperature change of the casting material during the curing process of the casting material in the mold cavity, so that the difference between the temperature of the outer surface of the casting material and the temperature inside the casting material is always maintained at 0 to 3°C.

5. The three-pillar insulator mold according to claim 4, characterized in that: The temperature in the casting material is the temperature of the casting material at the center position in the mold.

6. The three-pillar insulator mold according to claim 4, characterized in that: The heating plate is also used to preheat the three-pillar insulator mold before pouring the casting material into the mold.

7. The three-pillar insulator mold according to claim 4, characterized in that: The heating plate is also covered with a protective layer, which is used to prevent the heating plate from overheating and the casting material from adhering to the protective layer. The inner cavity of the mold covered with the protective layer has the same shape as the inner cavity of the mold body.

8. The three-pillar insulator mold according to claim 4, characterized in that: The temperature control system is used to individually control the heating temperatures at different locations on the heating plate.

9. A molding system, comprising a three-pillar insulator mold, characterized in that: The three-pillar insulator mold adopts the three-pillar insulator mold as described in any one of claims 1 to 8.

10. The molding system according to claim 9, characterized in that: It also includes an oven or an insulation box, which is also used to preheat the three-pillar insulator mold before pouring casting material into the mold. The three-pillar insulator mold is placed in the insulation box during the pouring and curing stage.

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