Energy-saving isostatic pressing device for preparing ceramic insulator

Abstract

The application relates to the technical field of ceramic forming, in particular to an energy-saving isostatic pressing forming device for preparing ceramic insulators, which comprises a base, a hydraulic push rod for isostatic forming is arranged on the top inner wall of the base, and a forming mechanism is further arranged. The forming mechanism is arranged, so that the material withdrawal frame can automatically discharge after processing is completed by using the return action of the hydraulic push rod, work efficiency is improved, the energy consumption of the hydraulic push rod under no load is avoided, and a certain degree of negative pressure is formed in the cylinder body during the upward movement of the lifting frame relative to the cylinder body, the inner wall of the rubber sleeve is separated from the insulator, the insulator after forming is prevented from being bonded with the rubber sleeve, and the situation that the insulator cannot be smoothly discharged is avoided. The auxiliary mechanism is arranged, so that the pinion one is driven to rotate by the pinion two after processing is completed, the core column is driven to rotate by the pinion one, and the discharging and core withdrawal are synchronously completed, so that the work efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of ceramic forming technology, and in particular to an energy-saving isostatic pressing apparatus for the preparation of ceramic insulators. Background Technology

[0002] Ceramic insulators are core insulating components in power transmission and distribution systems. With their excellent high-voltage resistance, corrosion resistance, and insulation stability, they are widely used in high-voltage and ultra-high-voltage transmission lines and substation equipment. Isostatic pressing is a key process in ceramic insulator manufacturing. Compared to traditional molding, this process achieves uniform pressure on the blank in all directions, effectively improving the density consistency and structural stability of the blank, and significantly reducing subsequent sintering cracking and deformation defects. It is the mainstream process for the large-scale production of high-end precision ceramic insulators. Currently, most mainstream isostatic pressing devices in the industry adopt a hydraulic pusher single-stroke extrusion molding structure, relying on the hydraulic system to provide high-pressure extrusion to compact and mold ceramic powder. The equipment has a simple structure, stable molding accuracy, and can meet the processing requirements of conventional insulator blanks, resulting in extremely high application rates.

[0003] However, existing molding equipment has significant energy consumption defects in actual industrial continuous production. The core problem is concentrated in the return stroke of the hydraulic push rod. The current equipment only outputs effective work during the forward extrusion stage of the hydraulic push rod to complete the blank forming process. However, during the return stroke reset process of the hydraulic push rod in a single molding cycle, the equipment is in an unloaded state. The hydraulic system continues to maintain working pressure and drive the workpiece reset, with no effective production output throughout the process. This results in wasted energy consumption during the return stroke of the hydraulic push rod, and the long-term accumulated unloaded energy consumption greatly increases the production energy cost. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an energy-saving isostatic pressing apparatus for the preparation of ceramic insulators.

[0005] This invention adopts the following technical solution: an energy-saving isostatic pressing forming device for preparing ceramic insulators, comprising a base, wherein a hydraulic push rod for isostatic pressing is installed on the inner wall of the top of the base, and further comprising: The forming mechanism is capable of using the kinetic energy of the hydraulic push rod's return stroke to unload the formed insulator. The forming mechanism is located inside the base. An auxiliary mechanism is provided, which uses weight as a power source to transmit vibration into the device when the raw material is fed, thereby improving the density of the powder. The auxiliary mechanism is located inside the base.

[0006] Preferably, the forming mechanism includes a cylinder filled with hydraulic oil, the cylinder being slidably connected to the inner wall of the base, a material ejector being slidably connected to the top inner wall of the cylinder, a pair of pistons symmetrically distributed on both sides of the material ejector being slidably connected to the cylinder, the pistons being in close contact with the inner wall of the cylinder, a rubber sleeve being provided on the inner wall of the cylinder, one end of the rubber sleeve being fixed to the top inner wall of the cylinder, and the other end being fixed to the bottom inner wall of the material ejector, a lifting frame being slidably connected to the outer wall of the cylinder, the output end of the hydraulic push rod being fixed to the outer wall of the lifting frame, a top column extending into the cylinder being provided on the outer wall of the lifting frame, and a spring being provided between the top outer wall of the top column and the bottom outer wall of the material ejector.

[0007] Preferably, the outer wall of the lifting frame is provided with a guide groove, and each piston is provided with a sliding column that is slidably inserted into the guide groove on its outer wall.

[0008] Preferably, a pair of limiting posts are fixed on the bottom inner wall of the base, the cylinder is slidably sleeved on the limiting posts, and a spring is provided between the outer wall of the cylinder and the inner wall of the base, the spring being sleeved on the outer wall of the limiting posts.

[0009] Preferably, the top of the unloading rack is provided with a breathable layer, which is composed of mesh fabric, sponge and breathable sheet. The outer wall of the breathable layer is provided with a feed inlet, and a sealing cap is installed in the feed inlet.

[0010] Preferably, the auxiliary mechanism includes a core column rotatably connected to the inner wall of the cylinder. The top end of the core column extends into the feed inlet, and the bottom end of the core column penetrates the bottom of the cylinder and extends above the lifting frame. A dial wheel is installed on the outer wall of the bottom end of the core column. A spring is provided between the top outer wall of the dial wheel and the bottom outer wall of the cylinder. A fixed shaft is provided on the top outer wall of the lifting frame. A winch is rotatably connected to the outer wall of the fixed shaft. A rope is wound around the outer wall of the winch, and the free end of the rope is fixed to the inner wall of the base.

[0011] Preferably, a coil spring is provided between the inner wall of the winch and the outer wall of the fixed shaft, with one end of the coil spring fixed to the outer wall of the fixed shaft and the other end fixed to the inner wall of the winch.

[0012] Preferably, a second dial wheel is fixed on the top outer wall of the winch, which is coaxially distributed with the first dial wheel. The outer wall of the second dial wheel, which is close to the first dial wheel, is provided with a ratchet that engages in one direction.

[0013] Compared with the prior art, the beneficial effects of the present invention are: Firstly, the present invention, through the set forming mechanism, enables the hydraulic push rod to retract after processing, pushing the lifting frame upward. The lifting frame, through the top column and spring two, pushes the unloading frame upward, causing the unloading frame to carry the formed insulator out of the cylinder. At the same time, under the action of spring three, the core column will not move upward with the unloading frame, thus causing the insulator to move upward relative to the core column, completing the core unloading process. In this way, the return motion of the hydraulic push rod drives the unloading frame to automatically unload, improving work efficiency while avoiding the waste of energy consumption of the hydraulic push rod under no-load conditions. Secondly, the present invention, through the setting of guide grooves and sliding columns, enables the two pistons to move away from each other during the upward movement of the lifting frame relative to the cylinder body. This, in turn, increases the internal space of the cylinder body, thereby creating a certain degree of negative pressure inside the cylinder body. This increases the volume of the rubber sleeve, causing the inner wall of the rubber sleeve to separate from the insulator. This prevents the molded insulator from sticking to the rubber sleeve, which would prevent the material from being unloaded smoothly, thus improving the reliability of the device. Thirdly, the present invention, through the auxiliary mechanism, enables the hydraulic push rod to retract after processing, pushing the lifting frame upward. The lifting frame, through spring two, pushes the unloading frame upward and slides out of the cylinder, thereby allowing the unloading frame to push the formed insulator out of the cylinder, completing the automatic unloading. At the same time, after the lifting frame drives the winch upward, the rope loses tension. At this time, under the action of the coil spring, the winch rotates in the opposite direction to wind up the rope. The winch drives the second dial wheel to rotate in the opposite direction. At this time, under the unidirectional cooperation of the ratchet on the first and second dial wheels, the second dial wheel drives the first dial wheel to rotate, and the first dial wheel drives the core column to rotate, thereby realizing the synchronous completion of unloading and core unloading, which helps to improve work efficiency. In summary, the present invention, through its molding mechanism, enables the automatic unloading of the ejector frame by the return stroke of the hydraulic push rod after processing. This improves work efficiency while avoiding the waste of energy from the hydraulic push rod under no-load conditions. Furthermore, during the upward movement of the lifting frame relative to the cylinder, a certain degree of negative pressure is created inside the cylinder, causing the inner wall of the rubber sleeve to separate from the insulator. This prevents the molded insulator from sticking to the rubber sleeve, which would hinder unloading. Through the auxiliary mechanism, after processing, the second dial wheel drives the first dial wheel to rotate, and the first dial wheel drives the core column to rotate, thereby achieving simultaneous unloading and core ejection, which further improves work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 A three-dimensional cross-sectional view of the base provided in an embodiment of the present invention. Figure 1 ; Figure 3 A three-dimensional cross-sectional view of the base provided in an embodiment of the present invention. Figure 2 ; Figure 4A three-dimensional cross-sectional view of the base provided in an embodiment of the present invention. Figure 3 ; Figure 5 A three-dimensional structural diagram of the lifting frame provided in an embodiment of the present invention; Figure 6 This is a perspective sectional view of the cylinder block provided in an embodiment of the present invention; Figure 7 A three-dimensional schematic diagram of the auxiliary mechanism provided in the embodiment of the present invention; Figure 8 This is a three-dimensional cross-sectional view of a winch provided in an embodiment of the present invention.

[0015] In the picture: 1. Base; 11. Limiting post; 12. Hydraulic push rod; 2. Cylinder; 21. Piston; 211. Sliding column; 22. Unloading frame; 221. Breathable layer; 222. Feed inlet; 223. Sealing cover; 23. Rubber sleeve; 24. Spring one; 3. Lifting frame; 31. Guide groove; 32. Top column; 33. Spring two; 34. Fixed shaft; 4. Core column; 41. Spring three; 42. Dial wheel one; 5. Winch; 51. Coil spring; 52. Rope; 53. Dial wheel two; 531. Ratchet. Detailed Implementation

[0016] To make the technical means, creative features, objectives, and effects of this invention readily understandable, the invention is further described below with reference to specific illustrations. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Please see Figure 1 - Figure 8 As shown, an energy-saving isostatic pressing device for preparing ceramic insulators includes a base 1, a hydraulic push rod 12 for isostatic pressing is installed on the inner wall of the top of the base 1, and further includes: The forming mechanism is able to use the kinetic energy of the hydraulic push rod 12 during its return stroke to feed the formed insulator. The forming mechanism is located inside the base 1. The auxiliary mechanism can transmit vibration into the device by weight as a power source when the raw material is fed, thereby improving the density of the powder. The auxiliary mechanism is set in the base 1. The molding mechanism includes a cylinder 2 filled with hydraulic oil, which is slidably connected to the inner wall of the base 1. A material ejector 22 is slidably connected to the top inner wall of the cylinder 2. A pair of pistons 21 symmetrically distributed on both sides of the material ejector 22 are slidably connected inside the cylinder 2. The pistons 21 are in close contact with the inner wall of the cylinder 2. A rubber sleeve 23 is provided on the inner wall of the cylinder 2. One end of the rubber sleeve 23 is fixed to the top inner wall of the cylinder 2, and the other end is fixed to the bottom inner wall of the material ejector 22. A lifting frame 3 is slidably connected to the outer wall of the cylinder 2. The output end of the hydraulic push rod 12 is fixed to the outer wall of the lifting frame 3. A top post 32 extending into the cylinder 2 is provided on the outer wall of the lifting frame 3. A second spring 33 is provided between the bottom outer wall of the ejector frame 22 and the outer wall of the lifting frame 3. A guide groove 31 is provided on the outer wall of the lifting frame 3. A sliding column 211 is provided on the outer wall of each piston 21 and is slidably inserted into the guide groove 31. A pair of limiting columns 11 are fixed on the bottom inner wall of the base 1. The cylinder 2 is slidably sleeved on the limiting columns 11. A first spring 24 is provided between the outer wall of the cylinder 2 and the inner wall of the base 1. The first spring 24 is sleeved on the outer wall of the limiting column 11. A breathable layer 221 is provided on the top of the ejector frame 22. The breathable layer 221 is composed of mesh cloth, sponge and breathable sheet. A feed port 222 is provided on the outer wall of the breathable layer 221. A sealing cover 223 is installed in the feed port 222.

[0018] It should be noted that during molding, powder is added into the sleeve 23 through the feed port 222. Then, the hydraulic push rod 12 is extended and pushed the lifting frame 3 downward. The lifting frame 3 pulls the ejector frame 22 into the cylinder 2 through the spring 33, preventing the hydraulic pressure of the cylinder 2 from squeezing the ejector frame 22 out of the cylinder 2. At the same time, under the cooperation of the guide groove 31 on the lifting frame 3 and the sliding column 211 on the piston 21, the two pistons 21 slide and approach each other in the cylinder 2. The pistons 21 compress the internal space of the cylinder 2, increasing the hydraulic pressure inside the cylinder 2, thereby applying uniform pressure to the sleeve 23 wrapped in hydraulic oil. Then, the elastic deformation of the sleeve 23 extrudes and molds the powder. During the molding process, the air in the gaps between the powder is discharged through the breathable layer 221. In addition, the hydraulic push rod 12 extends downward and applies force without having to overcome the weight of the cylinder 2 and its internal parts, thereby reducing the workload of the hydraulic push rod 12 and contributing to energy saving and emission reduction.

[0019] After processing, the hydraulic push rod 12 retracts, pushing the lifting frame 3 upward. The lifting frame 3, through the top column 32 and spring 33, pushes the unloading frame 22 upward, causing the unloading frame 22 to slide the formed insulator out of the cylinder 2. At the same time, under the action of spring 41, the core column 4 will not move upward with the unloading frame 22, thus causing the insulator to move upward relative to the core column 4, completing the core removal process. This allows the return motion of the hydraulic push rod 12 to drive the unloading frame 22 to automatically unload, improving work efficiency while avoiding the waste of energy from the hydraulic push rod 12 under no-load conditions.

[0020] Furthermore, during the upward movement of the lifting frame 3 relative to the cylinder 2, the two pistons 21 move away from each other due to the cooperation of the guide groove 31 on the lifting frame 3 and the sliding column 211 on the piston 21. This increases the internal space of the cylinder 2, thereby creating a certain degree of negative pressure inside the cylinder 2. This increases the volume of the rubber sleeve 23, causing the inner wall of the rubber sleeve 23 to separate from the insulator. This prevents the molded insulator from sticking to the rubber sleeve 23, which would prevent the material from being fed smoothly, thus improving the reliability of the device.

[0021] The auxiliary mechanism includes a core column 4 rotatably connected to the inner wall of the cylinder 2. The top end of the core column 4 extends into the feed inlet 222, and the bottom end of the core column 4 penetrates the bottom of the cylinder 2 and extends above the lifting frame 3. A dial wheel 42 is installed on the outer wall of the bottom end of the core column 4. A spring 41 is provided between the top outer wall of the dial wheel 42 and the bottom outer wall of the cylinder 2. A fixed shaft 34 is provided on the top outer wall of the lifting frame 3. A winch 5 is rotatably connected to the outer wall of the fixed shaft 34. A rope 52 is wound around the outer wall of the winch 5. The free end of the rope 52 is fixed to the inner wall of the base 1. A coil spring 51 is provided between the inner wall of the winch 5 and the outer wall of the fixed shaft 34. One end of the coil spring 51 is fixed to the outer wall of the fixed shaft 34, and the other end is fixed to the inner wall of the winch 5. A second dial 53, which is coaxially distributed with the first dial 42, is fixed on the outer wall of the top of the winch 5. A ratchet 531 with one-way engagement is provided on the outer wall of the end of the second dial 53 that is close to the first dial 42.

[0022] It should be noted that when adding powder, the sealing cover 223 is opened, and the raw material for molding powder is added into the rubber sleeve 23. As the powder is added, the overall weight of the cylinder 2 increases, which causes the cylinder 2 to compress the first spring 24 and move downward. The cylinder 2 pushes the top column 32 downward through the second spring 33, and the top column 32 drives the lifting frame 3 to move downward. During the above process, the hydraulic push rod 12 is de-energized to prevent the lifting frame 3 from being locked after the hydraulic push rod 12 is energized. The lifting frame 3 drives the winch 5 to move downward relative to the base 1, which stretches the rope 52 fixed on the inner wall of the base 1, thereby causing the rope 52 to pull. The winch 5 rotates and compresses the coil spring 51. The winch 5 drives the second dial wheel 53 to rotate. Under the action of the ratchet 531, the second dial wheel 53 pushes the first dial wheel 42 upward through the inclined surface of the ratchet 531. The first dial wheel 42 drives the core column 4 to move upward. When the ratchet 531 on the first dial wheel 42 and the second dial wheel 53 separates, the core column 4 moves downward and resets under the action of the third spring 41. This process is repeated so that the core column 4 transmits the vibration to the rubber sleeve 23, which makes the material powder accumulate more compactly, avoids the situation of material powder bridging, improves the molding effect, and eliminates the need for an additional power source.

[0023] During molding, the hydraulic push rod 12 is extended, and the hydraulic push rod 12 pushes the lifting frame 3 to move down. Since the strength of spring 23 is lower than that of spring 24, spring 23 will be stretched first, and spring 24 will be compressed later. As a result, the lifting frame 3 drives the dial wheel 253 away from the dial wheel 42, so as to achieve the effect of not triggering vibration during molding, avoiding the impact of vibration on the force of the rubber sleeve 23 during molding, and further ensuring the molding effect.

[0024] After processing, the hydraulic push rod 12 retracts, pushing the lifting frame 3 upward. The lifting frame 3, through spring 2 33, pushes the unloading frame 22 upward and slides out of the cylinder 2, thus allowing the unloading frame 22 to push the formed insulator out of the cylinder 2, completing the automatic unloading. At the same time, after the lifting frame 3 drives the winch 5 upward, the rope 52 loses tension. At this time, under the action of the coil spring 51, the winch 5 rotates in the opposite direction to wind up the rope 52. The winch 5 drives the second dial wheel 53 to rotate in the opposite direction. At this time, under the unidirectional cooperation of the ratchet 531 on the first dial wheel 42 and the second dial wheel 53, the second dial wheel 53 drives the first dial wheel 42 to rotate, and the first dial wheel 42 drives the core column 4 to rotate, thus realizing the synchronous completion of unloading and core unloading, which helps to improve work efficiency.

[0025] Working principle: When adding powder, open the sealing cap 223 and add the molding powder material into the rubber sleeve 23. As the powder is added, the overall weight of the cylinder 2 increases, causing the cylinder 2 to compress the spring 24 and move downward. The cylinder 2 pushes the top column 32 downward through the spring 33, and the top column 32 drives the lifting frame 3 to move downward. During the above process, the hydraulic push rod 12 is de-energized to prevent the lifting frame 3 from locking after the hydraulic push rod 12 is energized. The lifting frame 3 drives the winch 5 to move downward relative to the base 1, causing the rope 52 fixed on the inner wall of the base 1 to be stretched, thereby making the rope 52... Pulling the winch 5 to rotate and compressing the coil spring 51 causes the winch 5 to drive the second dial wheel 53 to rotate. Under the action of the ratchet 531, the second dial wheel 53 pushes the first dial wheel 42 upward through the inclined surface of the ratchet 531. The first dial wheel 42 drives the core column 4 to move upward. When the ratchet 531 on the first dial wheel 42 and the second dial wheel 53 separates, the core column 4 moves downward and resets under the action of the third spring 41. This process is repeated so that the core column 4 transmits the vibration to the rubber sleeve 23, thereby making the material powder accumulate more compactly, avoiding the bridging of material powder, and improving the molding effect.

[0026] During molding, powder is added into the sleeve 23 through the feed port 222. Then, the hydraulic push rod 12 is extended and pushed the lifting frame 3 downward. The lifting frame 3 pulls the ejector frame 22 into the cylinder 2 through the spring 23, preventing the hydraulic pressure of the cylinder 2 from squeezing the ejector frame 22 out of the cylinder 2. At the same time, under the cooperation of the guide groove 31 on the lifting frame 3 and the sliding column 211 on the piston 21, the two pistons 21 slide and approach each other in the cylinder 2. The pistons 21 compress the internal space of the cylinder 2, increasing the hydraulic pressure inside the cylinder 2, thereby applying uniform pressure to the sleeve 23 wrapped in hydraulic oil. Then, the elastic deformation of the sleeve 23 extrudes and molds the powder. During the molding process, the air in the gap of the powder is discharged through the breathable layer 221. In addition, the hydraulic push rod 12 extends downward and applies force without having to overcome the weight of the cylinder 2 and its internal parts, thereby reducing the workload of the hydraulic push rod 12 and helping to save energy and reduce emissions. Under the action of the auxiliary mechanism, during molding, the hydraulic push rod 12 is extended and pushed the lifting frame 3 downward. Since the strength of spring 23 is lower than that of spring 124, spring 23 will be stretched first and spring 124 will be compressed later. As a result, the lifting frame 3 drives the dial wheel 253 away from the dial wheel 142, so as to achieve the effect of not triggering vibration during molding, avoiding the impact of vibration on the force of the rubber sleeve 23 during molding, and further ensuring the molding effect.

[0027] After processing, the hydraulic push rod 12 is retracted, and the hydraulic push rod 12 pushes the lifting frame 3 to move upward. The lifting frame 3 pushes the unloading frame 22 to move upward through the top column 32 and the second spring 33, so that the unloading frame 22 drives the formed insulator to slide out of the cylinder 2. At the same time, under the action of the third spring 41, the core column 4 will not move upward with the unloading frame 22, so that the insulator moves upward relative to the core column 4, completing the core unloading process. Then, the return action of the hydraulic push rod 12 drives the unloading frame 22 to automatically unload, improving work efficiency while avoiding the waste of energy consumption of the hydraulic push rod 12 under no-load conditions. Under the action of the auxiliary mechanism, after processing is completed, the hydraulic push rod 12 is controlled to retract, and the hydraulic push rod 12 pushes the lifting frame 3 to move upward. The lifting frame 3 pushes the unloading frame 22 to move upward through the second spring 33 and slides out of the cylinder 2, so that the unloading frame 22 pushes the formed insulator out of the cylinder 2, completing the automatic unloading. At the same time, after the lifting frame 3 drives the winch 5 to move upward, the rope 52 loses tension. At this time, under the action of the coil spring 51, the winch 5 rotates in the opposite direction to wind up the rope 52. The winch 5 drives the second dial wheel 53 to rotate in the opposite direction. At this time, under the unidirectional cooperation of the ratchet 531 on the first dial wheel 42 and the second dial wheel 53, the second dial wheel 53 drives the first dial wheel 42 to rotate, and the first dial wheel 42 drives the core column 4 to rotate, thereby realizing the synchronous completion of unloading and core unloading, which helps to improve work efficiency.

[0028] Furthermore, during the upward movement of the lifting frame 3 relative to the cylinder 2, the two pistons 21 move away from each other due to the cooperation of the guide groove 31 on the lifting frame 3 and the sliding column 211 on the piston 21. This increases the internal space of the cylinder 2, thereby creating a certain degree of negative pressure inside the cylinder 2. This increases the volume of the rubber sleeve 23, causing the inner wall of the rubber sleeve 23 to separate from the insulator. This prevents the molded insulator from sticking to the rubber sleeve 23, which would prevent the material from being fed smoothly, thus improving the reliability of the device.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving isostatic pressing device for preparing ceramic insulators, comprising a base (1), wherein a hydraulic push rod (12) for static pressing is installed on the inner wall of the top of the base (1), characterized in that, Also includes: The forming mechanism is able to use the return kinetic energy of the hydraulic push rod (12) to unload the formed insulator when the hydraulic push rod (12) returns. The forming mechanism is set inside the base (1). The auxiliary mechanism is able to transmit vibration into the device by weight as a power source when the raw material is fed, thereby improving the density of the powder. The auxiliary mechanism is set in the base (1).

2. The energy-saving isostatic pressing device for preparing ceramic insulators according to claim 1, characterized in that: The forming mechanism includes a cylinder (2) filled with hydraulic oil. The cylinder (2) is slidably connected to the inner wall of the base (1). A material ejector (22) is slidably connected to the top inner wall of the cylinder (2). A pair of pistons (21) symmetrically distributed on both sides of the material ejector (22) are slidably connected inside the cylinder (2). The pistons (21) are in close contact with the inner wall of the cylinder (2). A rubber sleeve (23) is provided on the inner wall of the cylinder (2). One end of the rubber sleeve (23) The cylinder (2) is fixed on the top inner wall and the other end is fixed on the bottom inner wall of the ejector frame (22). The cylinder (2) is slidably connected to the outer wall of the cylinder (2). The output end of the hydraulic push rod (12) is fixed on the outer wall of the ejector frame (3). The outer wall of the ejector frame (3) is provided with a top column (32) extending into the cylinder (2). A spring (33) is provided between the top outer wall of the top column (32) and the bottom outer wall of the ejector frame (22).

3. The energy-saving isostatic pressing device for preparing ceramic insulators according to claim 2, characterized in that: The outer wall of the lifting frame (3) is provided with a guide groove (31), and each piston (21) is provided with a sliding column (211) that is slidably inserted into the guide groove (31).

4. The energy-saving isostatic pressing device for preparing ceramic insulators according to claim 2, characterized in that: A pair of limiting posts (11) are fixed on the bottom inner wall of the base (1). The cylinder (2) is slidably sleeved on the limiting posts (11). A spring (24) is provided between the outer wall of the cylinder (2) and the inner wall of the base (1). The spring (24) is sleeved on the outer wall of the limiting posts (11).

5. The energy-saving isostatic pressing device for preparing ceramic insulators according to claim 2, characterized in that: The top of the unloading rack (22) is provided with a breathable layer (221), which is composed of mesh, sponge and breathable sheet. The outer wall of the breathable layer (221) is provided with a feed inlet (222), and a sealing cap (223) is installed inside the feed inlet (222).

6. The energy-saving isostatic pressing device for preparing ceramic insulators according to claim 1, characterized in that: The auxiliary mechanism includes a core column (4) rotatably connected to the inner wall of the cylinder (2). The top end of the core column (4) extends into the feed inlet (222). The bottom end of the core column (4) penetrates the bottom of the cylinder (2) and extends to the top of the lifting frame (3). A dial wheel (42) is installed on the outer wall of the bottom end of the core column (4). A spring (41) is provided between the top outer wall of the dial wheel (42) and the bottom outer wall of the cylinder (2). A fixed shaft (34) is provided on the top outer wall of the lifting frame (3). A winch (5) is rotatably connected to the outer wall of the fixed shaft (34). A rope (52) is wound on the outer wall of the winch (5). The free end of the rope (52) is fixed to the inner wall of the base (1).

7. The energy-saving isostatic pressing device for preparing ceramic insulators according to claim 6, characterized in that: A coil spring (51) is provided between the inner wall of the winch (5) and the outer wall of the fixed shaft (34). One end of the coil spring (51) is fixed to the outer wall of the fixed shaft (34), and the other end is fixed to the inner wall of the winch (5).

8. The energy-saving isostatic pressing device for preparing ceramic insulators according to claim 6, characterized in that: The top outer wall of the winch (5) is fixed with a second dial (53) coaxially distributed with the first dial (42). The outer wall of the second dial (53) and the first dial (42) are provided with a ratchet (531) that engages in one direction.

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