A molding apparatus for hybrid insulators

Abstract

This invention relates to a molding equipment for hybrid insulators, comprising an injection unit, a mold unit, an electrical control unit, a temperature control unit, a hydraulic control unit, a frame, and a safety protection unit. The mold unit includes a mold, a lower mold base, a heating plate, an upper mold base, a runner plate, a station switching mechanism, and an upper and lower mold opening and closing mechanism. The mold is used to accommodate the preform and cover material. The lower mold base supports the mold and moves it between the injection station and the loading / unloading station. The heating plate heats the lower mold base. The upper mold base has an injection port communicating with the injection unit. The runner plate can open and close with the mold at the injection station, and has runners that communicate with the injection port and the inner cavity of the mold at the injection station. After the mold opens, the space above the mold is large, preventing interference between the robotic arm and the upper mold, thus enabling automated loading and unloading of hybrid insulators during injection molding.

Description

Technical Field

[0001] This invention relates to the field of hybrid insulator production technology, and in particular to a molding device for hybrid insulators. Background Technology

[0002] Insulators are key components of ultra-high voltage (UHV) transmission lines, with an annual output value exceeding tens of billions of yuan. The first-generation ceramic insulators used in traditional high-voltage lines, a technological solution first proposed by Japan, have a service life of approximately 50 years. However, due to numerous drawbacks such as fragility, flashover susceptibility, surface adhesion, and high maintenance costs, they are no longer sufficient to meet the construction requirements of UHV lines. The second-generation insulator, a composite insulator first developed by Europe and the United States, suffers from high prices and a service life of only about 10 years due to the softness of its silicone rubber material, making it unsuitable for large-scale construction. The "new generation (third generation) hybrid insulator" technology, a third technological solution distinct from those of Japan and Europe, was first proposed by our team. Its core lies in developing specialized molds and molding equipment for overmolding, and innovating injection molding processes to achieve hybrid overmolding of ceramic and glass insulators. The new generation of hybrid insulators has an expected lifespan of approximately 70 years, with 40-50 years of maintenance-free operation. The profit per unit is 400-500 yuan higher than traditional insulators, resulting in significant economic value.

[0003] Chinese utility model patent CN218660276U discloses an injection mold for uniformly coated hybrid insulators, comprising: a frame, an upper mold, a lower mold, side molds, and a runner. The lower mold is mounted on the frame and has a mold core. The side molds are movably mounted on the lower molds on both sides of the mold core. The upper mold is mounted on the frame above the side molds. When the mold is closed, the lower mold, side molds, and upper mold form a molding cavity that conforms to the contour of the ceramic part. The runner is used to transport silicone rubber into the molding cavity, and the outlet ends of the runner are located on both sides of the upper part and the bottom part of the molding cavity. In the above patent, the lower mold can only move up and down. After the upper and lower molds are opened, the upper mold is still located above the lower mold. At this time, if a robot is used to place the preform into the cavity, interference will occur between the robot and the upper mold, making it difficult to achieve automated loading and unloading of hybrid insulators during injection molding. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is how to realize the automated loading and unloading of hybrid insulators during injection molding.

[0005] To solve the above-mentioned technical problems, the present invention provides a molding device for hybrid insulators, comprising an injection unit for receiving coating material and injecting it after plasticizing the coating material; a mold unit for accommodating a preform and receiving the coating material from the injection unit and solidifying the coating material on the outside of the preform; an electrical control unit for controlling the electrical components of the molding device; a temperature control unit for controlling the heating devices of the molding device; a hydraulic control unit for controlling the hydraulic devices of the molding device; a frame serving as the main load-bearing structure of the molding device; and a safety protection unit for providing safety protection for the molding device. The mold unit includes:

[0006] Injection station;

[0007] The loading and unloading station is located to the side of the injection station;

[0008] A mold, the mold being used to hold a preform and cover material;

[0009] The lower mold base is installed at the bottom of the mold and is used to support the mold and move the mold between the injection station and the loading / unloading station;

[0010] A heating plate, which is mounted on the lower mold base and used to heat the lower mold base;

[0011] The upper mold base is installed above the injection station and has an injection port that communicates with the injection unit.

[0012] A runner plate is installed at the bottom of the upper mold base. The runner plate can be opened and closed vertically with the mold at the injection station. The runner plate is provided with a runner, which can communicate with the injection port of the mold base and the inner cavity of the mold at the injection station.

[0013] A station switching mechanism is used to drive the lower mold base to move between the injection station and the loading / unloading station;

[0014] An upper and lower mold opening and closing mechanism is used to drive the runner plate and the mold at the injection station to open and close in the upper and lower direction.

[0015] In one embodiment of the present invention, the flow channel has multiple flow channel outlets, and the multiple flow channel outlets respectively correspond to different positions of the mold cavity of the injection station.

[0016] In one embodiment of the present invention, the outlet of the flow channel is connected to a flow channel pipe.

[0017] In one embodiment of the invention, the flow channel is retractable.

[0018] In one embodiment of the present invention, the mold unit includes:

[0019] The two loading and unloading stations are respectively located on both sides of the injection station;

[0020] The two lower mold bases, one of which is used to carry one mold and move the mold between the injection station and one loading / unloading station, and the other lower mold base is used to carry another mold and move the mold between the injection station and another loading / unloading station;

[0021] The two heating plates are used to heat the two lower mold bases respectively;

[0022] The workstation switching mechanism drives the two lower mold bases to move synchronously.

[0023] In one embodiment of the present invention, the mold is a transfer mold, and the plurality of transfer molds include an openable and closable upper mold and a lower mold, and the plurality of transfer molds are used in combination with the same lower mold base.

[0024] In one embodiment of the present invention, the mold is a fixed mold, the fixed mold includes a lower mold, and each lower mold base corresponds to one fixed mold.

[0025] In one embodiment of the present invention, the upper and lower opening and closing mold mechanism is installed below the injection station, and the upper and lower opening and closing mold mechanism drives the lower mold base of the injection station to rise and fall.

[0026] In one embodiment of the present invention, a lateral core-pulling mechanism is further provided on the side of each of the loading and unloading stations, the lateral core-pulling mechanism being used to drive the side cores inside the mold of the loading and unloading station to move laterally.

[0027] In one embodiment of the present invention, the injection unit includes a feeding mechanism, a plasticizing mechanism, and an injection mechanism. The feeding mechanism is used to receive coating material and convey the coating material to the plasticizing mechanism. The plasticizing mechanism is used to receive the coating material sent by the feeding mechanism, plasticize the coating material, and then convey it to the injection mechanism. The injection mechanism is used to receive the coating material sent by the plasticizing mechanism and send the coating material to the mold unit.

[0028] The technical solution of the present invention has the following advantages over the prior art:

[0029] The molding equipment for hybrid insulators described in this invention, by setting up an injection station and a loading and unloading station, has a large space above the mold after the mold is opened, which makes it easy to put the blank into the cavity by a robot arm. There will be no problem of interference between the robot arm and the upper mold, and the automated loading and unloading of hybrid insulators can be realized.

[0030] The molding equipment for hybrid insulators described in this invention improves production efficiency by setting up two loading and unloading stations. One loading and unloading station is used to load blanks or molds, while the other loading and unloading station can inject covering materials. Attached Figure Description

[0031] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0032] Figure 1 A schematic diagram from one angle of the molding equipment for the hybrid insulator provided by the present invention;

[0033] Figure 2 This is a schematic diagram showing the connection between the feeding mechanism, plasticizing mechanism, and injection mechanism disclosed in this invention;

[0034] Figure 3 This is a schematic diagram showing the fit between the runner plate disclosed in this invention and the lower mold of the transfer mold at the injection station;

[0035] Figure 4 This is a perspective view of the flow channel plate disclosed in this invention;

[0036] Figure 5 This is a front view of the flow channel plate disclosed in this invention.

[0037] Explanation of reference numerals on the accompanying drawings:

[0038] Injection unit; 11. Feeding mechanism; 111. Feeding cylinder; 112. Pusher plunger; 113. Side feeding port; 12. Plasticizing mechanism; 121. Plasticizing cylinder; 122. Plasticizing screw; 13. Injection mechanism; 131. Injection cylinder; 132. Injection screw;

[0039] Mold unit; 21. Lower mold base; 22. Heating plate; 23. Upper mold base; 24. Runner plate; 241. Runner; 242. Runner tube; 25. Station switching mechanism; 26. Upper and lower mold opening and closing mechanism; 271. Upper mold; 272. Lower mold; 273. Upper mold injection port; 28. Side core pulling mechanism;

[0040] 31. Electrical control unit; 32. Hydraulic control unit; 33. Temperature control unit. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0042] Example 1: See Figures 1 to 5 As shown, a molding apparatus for a hybrid insulator includes an injection unit 1 for receiving and plasticizing a coating material before injection; a mold unit 2 for accommodating a preform and receiving the coating material from the injection unit 1, and solidifying the coating material on the outside of the preform; an electrical control unit 31 for controlling the electrical components of the molding apparatus; a temperature control unit 32 for controlling the heating devices of the molding apparatus; a hydraulic control unit 33 for controlling the hydraulic devices of the molding apparatus; a frame serving as the main load-bearing structure of the molding apparatus; and a safety protection unit for providing safety protection for the molding apparatus. The mold unit 2 includes:

[0043] Injection station;

[0044] The loading and unloading station is located to the side of the injection station.

[0045] A mold (not shown in the figure) is used to hold the preform and cover the material.

[0046] The lower mold base 21 is installed at the bottom of the mold and is used to support the mold and move the mold between the injection station and the loading / unloading station.

[0047] Heating plate 22, which is installed on the lower mold base 21 and used to heat the lower mold base 21;

[0048] Upper mold base 23 is installed above the injection station and is provided with a mold base injection port that communicates with the injection unit 1.

[0049] Runner plate 24 is installed at the bottom of the upper mold base 23. The runner plate 24 can be opened and closed with the mold at the injection station. The runner plate 24 is provided with runner 241, which can communicate with the injection port of the mold base and the inner cavity of the mold at the injection station.

[0050] The station switching mechanism 25 is used to drive the lower mold base 21 to move between the injection station and the loading / unloading station.

[0051] The upper and lower opening and closing mold mechanism 26 is used to drive the runner plate 24 and the mold at the injection station to open and close in the upper and lower direction.

[0052] The aforementioned mold unit is designed at the front end of the plasticizing equipment and works in conjunction with the injection unit. The upper mold base has a runner system, with the upper end of the runner contacting and engaging with the injection nozzle, allowing the coating material to enter the mold unit. A runner plate is installed on the upper mold base, and its runner system seamlessly connects with that of the upper mold base. The runner system within the runner plate is a cold runner system with an adjustable temperature range of 20-60℃, ensuring rapid material flow during molding. When the plasticizing equipment is idle or stopped, the material in the runner remains uncured. A heating plate is installed on the lower mold base and has a built-in electric heating device. During production, it preheats the mold mounted on it and maintains a relatively high and stable mold temperature, which is beneficial for product molding.

[0053] In operation, the lower mold base first moves to the loading / unloading station. The robot arm places the parison into the mold at the loading / unloading station, or places the mold containing the parison onto the lower mold base at the loading / unloading station. Then, the lower mold base, carrying the mold, moves to the injection station. The lower mold base then moves upward to close the runner plate with the mold at the injection station. The injection mechanism injects high-temperature vulcanized solid silicone rubber around the parison in the mold. After the coating material in the mold has solidified, the lower mold base moves downward to open the runner plate from the mold at the injection station. The lower mold base then returns to the loading / unloading station with the mold. The robot arm removes the parison from the mold at the loading / unloading station, or removes the mold containing the parison from the lower mold base at the loading / unloading station. The aforementioned station switching mechanism includes a stepper motor.

[0054] In this preferred embodiment, the flow channel 241 has multiple flow channel outlets, each corresponding to a different position within the mold cavity of the injection station. By providing multiple flow channel outlets, the pressure on the preform during injection is more even, and the high-temperature vulcanized solid silicone rubber is more easily injected into the designated positions.

[0055] In this preferred embodiment, the outlet of the flow channel 241 is connected to a flow channel tube 242. Since the flowability of high-temperature vulcanized solid silicone rubber is not very good, the flow channel tube can extend into the inner cavity of the lower mold, making it easier to inject the high-temperature vulcanized solid silicone rubber into the lower mold near the bottom.

[0056] In this preferred embodiment, the runner tube 242 is telescopic. During injection, the runner tube can extend and retract; initially, it is longer, and as injection progresses, it gradually shortens. In other words, during injection, the outlet of the runner tube gradually moves away from the bottom of the lower mold.

[0057] In a preferred embodiment of this invention, the mold unit includes:

[0058] The two loading and unloading stations are respectively located on both sides of the injection station.

[0059] Two lower mold bases 21 are provided, one of which is used to support one mold and move the mold between the injection station and one loading / unloading station, and the other is used to support another mold and move the mold between the injection station and another loading / unloading station.

[0060] The two heating plates 22 are used to heat the two lower mold bases 21 respectively;

[0061] The aforementioned workstation switching mechanism 25 drives the two aforementioned lower mold bases 21 to move synchronously.

[0062] When using it, the following steps are included:

[0063] S1. The first lower mold base is transferred to the first loading and unloading station. The robot arm places the blank into the mold of the first loading and unloading station or places the mold containing the blank onto the first lower mold base of the first loading and unloading station.

[0064] S2. The first lower mold base, carrying the mold, arrives at the injection station. The first lower mold base moves upward so that the runner plate closes with the mold at the injection station. The injection mechanism injects high-temperature vulcanized solid silicone rubber around the parison in the mold. After the coating material in the mold solidifies, the second lower mold base moves to the second loading and unloading station. The robot puts the parison into the mold at the second loading and unloading station or puts the mold containing the parison onto the second lower mold base at the second loading and unloading station.

[0065] S3. The second lower mold base, carrying the mold, arrives at the injection station. The second lower mold base moves upward so that the runner plate closes with the mold at the injection station. The injection mechanism injects high-temperature vulcanized solid silicone rubber around the parison in the mold. After the coating material in the mold solidifies, the first lower mold base moves to the first loading and unloading station. The robot places the parison into the mold at the first loading and unloading station or places the mold containing the parison onto the first lower mold base at the first loading and unloading station, returning to step S2.

[0066] In one embodiment of the present invention, the mold is a transfer mold, and the plurality of transfer molds include an openable and closable upper mold 271 and a lower mold 272. The plurality of transfer molds are used interchangeably in conjunction with the same lower mold base. The delivered transfer mold is placed on the lower mold base, and the upper mold 271 and lower mold 272 of the transfer mold on the lower mold base do not need to be opened. The flow channel of the flow channel plate is connected to the injection port 273 of the upper mold of the transfer mold.

[0067] In this preferred embodiment, the upper and lower mold opening and closing mechanism 26 is installed below the injection station, and the mechanism drives the lower mold base 21 of the injection station to rise and fall. Since the upper mold base is connected to the injection unit, fixing the injection unit to the upper mold base shortens the flow path of the coating material. The mold opening and closing in the vertical direction is achieved by raising and lowering the lower mold base. Specifically, the upper and lower mold opening and closing mechanism is a hydraulic cylinder.

[0068] In a preferred embodiment of this work, each of the aforementioned loading and unloading stations is further provided with a lateral core-pulling mechanism 28 on its side. This lateral core-pulling mechanism 28 drives the side core within the mold at the loading and unloading station to move laterally. Since the hybrid insulator is umbrella-shaped, its outer diameter varies at different axial positions. The lateral core-pulling mechanism can shape irregular shapes and remove the final product. Specifically, the lateral core-pulling mechanism includes a pull rod and a hydraulic cylinder, enabling lateral core pulling. When the mold is a transfer mold, the lateral suction mechanism is detachably connected to the side core of the mold; when the mold is a fixed mold, the lateral suction mechanism is fixedly connected to the side core of the mold.

[0069] In a preferred embodiment of this example, the injection unit 1 includes a feeding mechanism 11, a plasticizing mechanism 12, and an injection mechanism 13. The feeding mechanism 11 is used to receive the coating material and transport the coating material to the plasticizing mechanism 12. The plasticizing mechanism 12 is used to receive the coating material delivered by the feeding mechanism 11, plasticize the coating material, and then transport it to the injection mechanism 13. The injection mechanism 13 is used to receive the coating material delivered by the plasticizing mechanism 12 and deliver the coating material to the mold unit 2.

[0070] The feeding mechanism 11 includes a feeding cylinder 111 for containing high-temperature vulcanized solid silicone rubber and a pusher plunger 112 for compacting and conveying high-temperature vulcanized solid silicone rubber; the plasticizing mechanism 12 includes a plasticizing cylinder 121 for containing high-temperature vulcanized solid silicone rubber and a plasticizing screw 122 for shearing and conveying high-temperature vulcanized solid silicone rubber; the injection mechanism 13 includes an injection cylinder 131 for containing high-temperature vulcanized solid silicone rubber and an injection screw 132 for shearing and conveying high-temperature vulcanized solid silicone rubber.

[0071] The aforementioned mold unit is used to accommodate the preform and receive the high-temperature vulcanized solid silicone rubber sent by the injection mechanism 13, and to heat and cure the high-temperature vulcanized solid silicone rubber.

[0072] The feed cylinder has a side feeding port 113 on its outer side, through which solid materials can be added; the pusher plunger can compact the solid materials and remove the entrained air under the drive of the motor, and push them into the plasticizing mechanism; the feed cylinder is connected to the side wall of the plasticizing cylinder and can swing up and down, which makes it convenient to adjust the height of the feed cylinder and the position of the feed port, so as to facilitate the operation of the workers.

[0073] The plasticizing cylinder is equipped with a high-temperature oil circuit heating unit on its exterior. The temperature of the high-temperature oil circuit heating system is adjustable and can precisely control the temperature of the plasticizing cylinder, with a temperature range of 20-100℃ and a temperature deviation of 0.5℃. The front end of the plasticizing cylinder is designed with an upward-facing connecting port, which connects to the injection mechanism. Inside the plasticizing cylinder is a plasticizing screw, which works in conjunction with the plasticizing motor on the rear side of the plasticizing cylinder. Driven by the motor, it can rotate and move to achieve shearing, plasticizing, compaction, and removal of air from solid materials, and feed the material to the injection mechanism through the front connecting port.

[0074] The aforementioned injection barrel is equipped with heating coils, high-temperature oil circuits, and other heating units in its outer sections. These heating units allow for precise temperature control of the entire barrel segment, with a temperature range of 20-200℃ and a control accuracy within 0.5℃. An injection screw is installed inside the injection barrel, working in conjunction with an injection motor at the rear. Driven by the motor, the screw rotates and moves, achieving secondary plasticization, compaction, degassing, and injection of the solid material. A right-angle downward-facing injection nozzle is located at the front of the injection barrel. An oil temperature control unit is located on the outer edge of the nozzle, connected to and independently controllable by the oil temperature control system on the outside of the injection barrel. The secondary plasticized solid material is injected through the injection nozzle into the mold unit. The final high-temperature vulcanized solid silicone rubber injected into the mold unit by the injection mechanism has a viscosity of approximately 12.

[0075] The forming method of the above-mentioned hybrid insulator forming equipment is described below, including the following steps:

[0076] The first step is to put high-temperature vulcanized solid silicone rubber into the feeding cylinder 111, and then to push the high-temperature vulcanized solid silicone rubber in the feeding cylinder 111 to expel the entrained air and then to convey it to the plasticizing cylinder 121.

[0077] The second step involves shearing, plasticizing, compacting, and removing air contamination from the high-temperature vulcanized solid silicone rubber in the plasticizing cylinder 121 through the plasticizing screw 122 and then conveying it to the injection cylinder 131.

[0078] The third step involves injecting the high-temperature vulcanized solid silicone rubber in the injection cylinder 131 into the mold unit through the injection screw 132 after secondary shearing, plasticizing, compaction, and degassing.

[0079] The fourth step involves using the aforementioned mold unit to coat the preform with high-temperature vulcanized solid silicone rubber at the designated position.

[0080] The high-temperature vulcanized solid silicone rubber undergoes its first plasticization in the plasticizing mechanism 12, followed by degassing, compaction, temperature control, and precise feeding to the injection mechanism 13. Before injection molding, the injection mechanism 13 performs a second plasticization on the high-temperature vulcanized solid silicone rubber. The screw further compacts the high-temperature vulcanized solid silicone rubber and precisely controls the temperature to ensure that the injection material fully meets the molding requirements of injection volume, injection temperature, and pressure.

[0081] By setting up a two-stage plasticizing process, the high-temperature vulcanized solid silicone rubber is plasticized more densely. At this point, the high-temperature vulcanized solid silicone rubber contains almost no impurities or air bubbles, enabling precise feeding. At the same time, the pressure of the high-temperature vulcanized solid silicone rubber reaches 120 to 150 bar, resulting in a more superior coating layer performance for the final hybrid insulator, thus improving the product quality of the hybrid insulator.

[0082] In addition, the aforementioned molding equipment for hybrid insulators also includes an electrical control unit 31, a hydraulic control unit 32, a temperature control unit 33, a frame, and a safety protection unit. The electrical control unit comprises two parts: one part is located at the rear of the molding equipment, housing all the electrical control modules and systems of the molding machine, primarily for electrical control during operation and maintenance. The other part is located in the center of the front safety door, including a visual operation panel and a retractable operating handle, enabling process operation during the molding process. The hydraulic control unit is located inside the rear of the molding equipment, below the feeding mechanism, primarily controlling the hydraulic system for feeding, plasticizing, injection, mold base up-and-down movement, pressure holding, and left-and-right mold opening during operation and maintenance. The temperature control unit is located inside the rear of the molding equipment, parallel to the hydraulic system, primarily controlling the temperature units of the plasticizing temperature, injection temperature, runner plate, mold base, and other mechanisms. The frame is the main load-bearing structure of the molding equipment. Safety protection unit: Installed on the sides around the molding machine, the main body is divided into front and rear sides, and a safety door is opened at the feeding mechanism at the rear for easy operation and feeding; the front of the equipment is designed with an operation panel and a telescopic operation handle in the middle, which can realize the process operation of the molding process.

[0083] Example 2: The rest is the same as Example 1, except that the mold is a fixed mold, which includes a lower mold, and each lower mold base corresponds to one fixed mold. The delivered blank is loaded into the fixed mold.

[0084] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A molding apparatus for a hybrid insulator, comprising an injection unit for receiving a coating material and injecting it after plasticizing the coating material; a mold unit for accommodating a preform and receiving the coating material from the injection unit and solidifying the coating material on the outside of the preform; an electrical control unit for controlling various electrical components of the molding apparatus; a temperature control unit for controlling various heating devices of the molding apparatus; a hydraulic control unit for controlling various hydraulic devices of the molding apparatus; a frame serving as the main load-bearing structure of the molding apparatus; and a safety protection unit for providing safety protection for the molding apparatus, characterized in that... The coating material is high-temperature vulcanized solid silicone rubber; the mold unit includes: Injection station; The loading and unloading station is located to the side of the injection station; A mold, the mold being used to hold a preform and cover material; The lower mold base is installed at the bottom of the mold and is used to support the mold and move the mold between the injection station and the loading / unloading station; A heating plate, which is mounted on the lower mold base and used to heat the lower mold base; The upper mold base is installed above the injection station and has an injection port that communicates with the injection unit. A runner plate is installed at the bottom of the upper mold base. The runner plate can open and close with the mold at the injection station. The runner plate is provided with runners. The runners can communicate with the injection port of the mold base and the inner cavity of the mold at the injection station. The runners have multiple runner outlets, which correspond to different positions in the inner cavity of the mold at the injection station. The runner outlets are connected to runner pipes. The runner pipes are telescopic. During injection, the outlets of the runner pipes gradually move away from the bottom of the lower mold. A station switching mechanism is used to drive the lower mold base to move between the injection station and the loading / unloading station; An upper and lower mold opening and closing mechanism is used to drive the runner plate and the mold at the injection station to open and close in the upper and lower direction.

2. The molding equipment for hybrid insulators according to claim 1, characterized in that, The mold unit includes: The two loading and unloading stations are respectively located on both sides of the injection station; The two lower mold bases, one of which is used to support one mold and move the mold between the injection station and one loading / unloading station, and the other lower mold base is used to support another mold and move the mold between the injection station and another loading / unloading station; The two heating plates are used to heat the two lower mold bases respectively; The workstation switching mechanism drives the two lower mold bases to move synchronously.

3. The molding equipment for hybrid insulators according to claim 1, characterized in that, The mold is a transfer mold, and the multiple transfer molds include an openable and closable upper mold and a lower mold. The multiple transfer molds are used in combination with the same lower mold base, and the flow channel of the flow plate is connected to the injection port of the upper mold of the transfer mold.

4. The molding equipment for hybrid insulators according to claim 1, characterized in that, The mold is a fixed mold, which includes a lower mold, and each lower mold base corresponds to one fixed mold.

5. The molding equipment for hybrid insulators according to claim 1, characterized in that, The upper and lower opening and closing mold mechanism is installed below the injection station, and the upper and lower opening and closing mold mechanism drives the lower mold base of the injection station to rise and fall.

6. The molding equipment for hybrid insulators according to claim 1, characterized in that, Each of the loading and unloading stations is also provided with a lateral core-pulling mechanism on its side, which is used to drive the side core inside the mold of the loading and unloading station to move laterally.

7. The molding equipment for hybrid insulators according to claim 1, characterized in that, The injection unit includes a feeding mechanism, a plasticizing mechanism, and an injection mechanism. The feeding mechanism is used to receive coating material and transport the coating material to the plasticizing mechanism. The plasticizing mechanism is used to receive the coating material sent by the feeding mechanism, plasticize the coating material, and then transport it to the injection mechanism. The injection mechanism is used to receive the coating material sent by the plasticizing mechanism and deliver the coating material to the mold unit.

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