A special ceramic isostatic pressing device and process

Abstract

The present invention discloses a special ceramic isostatic pressing device, comprising a base, wherein the upper surface of the base is sequentially provided with a pressure chamber and a static pressing chamber that are interconnected, a loading device is provided in the pressure chamber, a guide cylinder is installed at the bottom of the isostatic pressing chamber, a cover plate is installed at the top of the isostatic pressing chamber, a rubber cylinder is provided between the guide cylinder and the cover plate, the inner cavity of the rubber cylinder is provided as a filling chamber, a base is slidably matched inside the guide cylinder, the lower surface of the base is connected to the telescopic end of the first electric telescopic rod, a core rod is installed in the middle of the upper surface of the base, and the top of the core rod extends upward to be flush with the top of the rubber cylinder. The present invention can uniformly pressurize the ceramic powder by hydraulic oil to obtain a ceramic tube by filling the filling chamber with ceramic powder, and after the filling is completed and the pressure cover is put on, the formed ceramic tube is automatically pushed out of the isostatic pressing device, thereby significantly improving the production efficiency of the ceramic tube.

Description

Technical Field

[0001] The invention relates to the technical field of isostatic pressing, in particular to a special ceramic isostatic pressing device and process. Background Art

[0002] Isostatic pressing is to place the sample to be pressed in a high-pressure container, and use the incompressible nature of the liquid medium and the property of uniformly transmitting pressure to uniformly pressurize the sample from all directions. When the liquid medium is injected into the pressure vessel through a pressure pump, according to the principles of fluid mechanics, its pressure remains unchanged and is evenly transmitted to all directions. At this time, the pressure on the powder in the high-pressure container in all directions is uniform and consistent. The method of molding the powder into a dense green body by the above method is called isostatic pressing.

[0003] In the prior art, in the isostatic pressing process of special ceramics, it is necessary to first load the granulated ceramic powder into a rubber mold, then seal the mold, and then put the rubber mold into an isostatic pressing device for high-pressure pressing. After molding, it is necessary to manually take the rubber mold out of the isostatic pressing device and take the molded product out of the rubber mold. Since the entire process cannot be automated, the production efficiency is low, especially during the feeding process, which consumes a lot of time. Summary of the invention

[0004] The purpose of the present invention is to improve and innovate the shortcomings and problems existing in the background technology and to provide a special ceramic isostatic pressing molding device and process.

[0005] A special ceramic isostatic pressing device comprises a base, wherein a pressure chamber and an isostatic pressing chamber which are interconnected are sequentially arranged on the upper surface of the base, a loading device is arranged in the pressure chamber to pressurize the hydraulic oil in the pressure chamber and the isostatic pressing chamber, a first guide cylinder is installed at the bottom of the isostatic pressing chamber, a cover plate is installed at the top of the isostatic pressing chamber, a rubber cylinder is arranged between the first guide cylinder and the cover plate, the inner cavity of the rubber cylinder is arranged as a filling cavity, a base is slidably fitted inside the first guide cylinder, the lower surface of the base is connected to the telescopic end of the first electric telescopic rod, a core rod is installed in the middle of the upper surface of the base, the top end of the core rod extends upward to be flush with the top end of the rubber cylinder, a feeding cavity which is connected to the filling cavity is opened on the cover plate, and a matching pressure cover is embedded in the feeding cavity.

[0006] A further solution is that an exhaust pipe and a feed pipe are respectively connected to both sides of the feeding chamber, the exhaust pipe is connected to a vacuum pump at one end away from the feeding chamber, and the feed pipe is connected to a feed bin at one end away from the feeding chamber.

[0007] A further solution is that a plurality of first guide cylinders and rubber cylinders are arranged in the isostatic pressing molding chamber, a corresponding number of feeding cavities and a corresponding number of pressure covers are arranged on the cover plate, a first air channel and a first material channel are arranged between adjacent feeding cavities on the cover plate, a second air channel and a second material channel are arranged on the pressure cover, when the pressure cover is completely embedded in the feeding cavity, the central axes of the first air channel and the second air channel coincide with each other, and the central axes of the first material channel and the second material channel coincide with each other, and the exhaust pipe and the feed pipe are respectively connected to the feeding cavities located on both sides.

[0008] A further solution is that the upper surface of the gland is connected to the telescopic end of the second electric telescopic rod, and the second electric telescopic rod is mounted on the cover plate through a bracket.

[0009] A further solution is that a groove is provided at the upper end of the core rod, a first spring is fixedly connected to the bottom wall of the groove, an extension rod is slidably fitted to the upper end of the groove, the upper end of the first spring is fixedly connected to the bottom end of the extension rod, and when the second air channel on the pressure cover enters the feeding chamber, the upper end of the extension rod fits with the pressure cover under the action of the first spring.

[0010] A further solution is that a partition is provided in the feed bin, a weighing device is installed on the partition, both ends of the partition are rotatably connected to the inner wall of the feed bin, and the partition is driven to rotate by a first motor.

[0011] A further solution is that a storage bin is provided just above the feed bin, a feeding pipe is provided at the bottom of the storage bin, a rotating roller is provided inside the feeding pipe, blades are distributed in a ring array on the rotating roller, rubber blocks in contact with the inner wall of the feeding pipe are provided at the ends of the blades, two ends of the rotating roller pass through the feeding pipe and are respectively fixedly connected to the output end of the second motor and the rotating wheel, a rotating rod is rotatably connected at an eccentric position of the rotating wheel, an end of the rotating rod away from the rotating wheel is fixedly connected to a rotating shaft, the rotating shaft is rotatably connected to the bottom end of the lifting rod, the middle part of the lifting rod is slidably matched with a limiting cylinder installed on the storage bin, the top end of the lifting rod passes through a convex plate installed on the storage bin and is fixedly connected with a vibration block, and when the rotating rod rotates to the lowest end of the rotating wheel, the bottom end of the vibration block fits with the upper surface of the convex plate.

[0012] A further solution is that the loading device includes a loading frame installed on the upper end of the pressure bin, a third motor is installed on the side wall of the loading frame, the output end of the third motor is fixedly connected to the first bevel gear, the first bevel gear is meshingly connected to the second bevel gear, the second bevel gear is installed on the outer surface of the threaded block, the threaded block is rotatably connected to the support plate, the inner surface of the threaded block is threadedly connected to a threaded rod, the bottom end of the threaded rod is fixedly connected to a guide plate, the guide plate is slidably matched with a second guide cylinder installed on the top wall of the pressure bin, and the guide plate is fixedly connected to the pressure plate through a connecting rod.

[0013] A further solution is that a vibration motor is installed on the outer wall of the first electric telescopic rod.

[0014] According to a second aspect of the present invention, a special ceramic isostatic pressing process based on the above-mentioned device is provided, which specifically comprises the following steps:

[0015] Powder is loaded into the filling cavity through the feeding cavity until the filling cavity is filled with powder, and then a pressure cover is embedded in the feeding cavity to press and compact the powder in the filling cavity;

[0016] The hydraulic oil in the pressure chamber and the isostatic pressing chamber is pressurized by a loading device; the hydraulic oil in the isostatic pressing chamber uniformly pressurizes the rubber cylinder from all directions to obtain a ceramic tube;

[0017] Release the hydraulic oil in the pressure chamber and isostatic pressing chamber, and remove the gland;

[0018] The base is pushed upward by the first electric telescopic rod, driving the formed ceramic tube to extend out of the isostatic pressing device, so as to facilitate the removal of the ceramic tube.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) the present invention can uniformly pressurize the ceramic powder into the filling cavity after the filling is completed and the pressure cover is put on, so as to obtain a ceramic tube; and the formed ceramic tube is automatically pushed out of the isostatic pressing device through the first electric telescopic rod; compared with the prior art, which first fills the granulated ceramic powder into a rubber mold, and then puts the rubber mold into the isostatic pressing device for high-pressure pressing, and after the molding, the rubber mold needs to be manually taken out of the isostatic pressing device, the present invention significantly improves the production efficiency of the ceramic tube;

[0020] (2) The present invention facilitates the powder in the feed bin to fall quickly into the filling cavity under the action of negative pressure through the mutual cooperation of the feed bin, the feed pipe, the exhaust pipe and the vacuum pump; since the hydraulic oil pressure in the isostatic pressing bin is constant and evenly transmitted to all directions, it is convenient to set a plurality of rubber cylinders in the isostatic pressing bin; at the same time, by aligning the first air channel opened on the cover plate with the second air channel opened on the pressure cover or the first material channel opened on the cover plate with the second material channel opened on the pressure cover, it is convenient for the powder in the feed bin to fall quickly into each filling cavity under the action of negative pressure, thereby facilitating the filling of ceramic powder into each filling cavity, and further facilitating the one-time isostatic pressing of multiple ceramic tubes, thereby further improving the production efficiency of ceramic tubes;

[0021] (3) The present invention provides a groove at the upper end of the core rod, a first spring is fixedly connected to the bottom wall of the groove, an extension rod is slidably matched at the upper end of the groove, and the upper end of the first spring is fixedly connected to the bottom end of the extension rod, so that after the second air channel on the pressure cover enters the feeding chamber, the upper end of the extension rod fits with the pressure cover under the action of the first spring, thereby preventing the ceramic powder from accumulating on the top of the core rod when the powder is filled into the filling chamber, resulting in the pressure cover being unable to be completely embedded in the feeding chamber due to the restriction of this part of the ceramic powder after the pressure cover is pressed and compacted, so that the first air channel opened on the cover plate and the second air channel opened on the pressure cover or the first material channel opened on the cover plate and the second material channel opened on the pressure cover cannot overlap with each other, thereby affecting the filling of ceramic powder into each filling chamber;

[0022] (4) When the second motor of the present invention drives the rotating roller to rotate, the powder can be discharged from the discharge pipe under the guidance of the blades. Moreover, through the mutual cooperation of the second motor, the rotating wheel, the rotating rod, the rotating shaft, the lifting rod, the limiting cylinder and the vibration block, the vibration block can be driven to continuously hit the convex plate, thereby causing the convex plate to vibrate, and then the discharge pipe to vibrate, making it more convenient to discharge the powder from the discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of an isostatic pressing device provided in an embodiment of the present invention;

[0025] Figure 2 The embodiment of the present invention provides Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0026] Figure 3 A schematic cross-sectional structure diagram of a pressure chamber and a loading frame provided in an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the front view structure of a feeding pipe and a storage bin provided in an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of the side view of the material discharge pipe and the material storage bin provided in an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the cross-sectional structure of a feed pipe provided in an embodiment of the present invention;

[0030] Figure 7This is a schematic diagram of the cross-sectional structure of a charging bin provided in an embodiment of the present invention.

[0031] Figure numerals: base 1, pressure chamber 2, isostatic pressing chamber 3, first guide cylinder 4, first electric telescopic rod 5, base 6, rubber cylinder 7, filling chamber 8, core rod 9, groove 10, first spring 11, extension rod 12, feeding chamber 13, cover plate 14, first air channel 141, first material channel 142, pressure cover 15, second air channel 151, second material channel 152, second electric telescopic rod 16, vacuum pump 17, exhaust pipe 18, feed pipe 19, feed chamber 20, first motor 21, partition 22, weighing device 23, Feeding pipe 24, storage bin 25, second motor 26, rotating roller 27, blade 28, vibrating device 29, rotating wheel 291, rotating rod 292, rotating shaft 293, lifting rod 294, limiting cylinder 295, vibrating block 296, convex plate 297, vibrating motor 30, loading frame 31, loading device 32, third motor 321, first bevel gear 322, second bevel gear 323, threaded block 324, support plate 325, threaded rod 326, guide plate 327, second guide cylinder 328, pressing plate 329. DETAILED DESCRIPTION

[0032] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0035] See also Figure 1 and Figure 3The present invention provides a special ceramic isostatic pressing device, including a base 1, wherein a pressure chamber 2 and an isostatic pressing chamber 3 are sequentially arranged on the upper surface of the base 1, and the bottom of the pressure chamber 2 is connected to the isostatic pressing chamber 3 through a connecting pipe, and a loading device 32 is arranged in the pressure chamber 2 to pressurize the hydraulic oil in the pressure chamber 2 and the isostatic pressing chamber 3. Specifically, the loading device 32 includes a loading frame 31 installed on the upper end of the pressure chamber 2, and a third motor 321 is installed on the side wall of the loading frame 31. The output end of the third motor 321 is fixedly connected to a first bevel gear 322, and the first bevel gear 322 is meshingly connected to a second bevel gear 323. The second bevel gear 323 is installed on the outer surface of a threaded block 324, and the threaded block 324 is rotatably connected to a support plate 325. A threaded rod 326 is threadedly connected to the inner surface of the threaded block 324, and a guide plate 327 is fixedly connected to the bottom end of the threaded rod 326. The guide plate 327 is slidably matched with a second guide cylinder 328 installed on the top wall of the pressure chamber 2, and the bottom end of the guide plate 327 is fixedly connected to a pressure plate 329 through a connecting rod. When the third motor 321 drives the first bevel gear 322 to rotate, through the meshing connection between the first bevel gear 322 and the second bevel gear 323, the threaded block 324 is rotatably connected to the support plate 325, which will drive the threaded block 324 to rotate. Since the guide plate 327 at the bottom end of the threaded rod 326 slides with the second guide cylinder 328, the threaded rod 326 will be driven to move up and down, and then the pressure plate 329 will be driven to move up and down, pressurizing the hydraulic oil in the inner cavity of the pressure chamber 2, and the pressure is transmitted to the isostatic pressing chamber 3 along the connecting pipe.

[0036] It should be noted that a rubber layer is provided on the outer surface of the pressure plate 329. By providing the rubber layer, the pressure plate 329 is in contact with the inner wall of the pressure chamber 2 through the rubber layer. The rubber layer can effectively prevent the pressure plate 329 from leaking when it moves up and down and affecting the pressure output of the pressure plate 329, thereby improving the sealing effect of the pressure plate 329 when it is in use.

[0037] Please continue reading Figure 1The first guide cylinder 4 is installed at the bottom of the isostatic pressing molding bin 3, and the cover plate 14 is installed at the top of the isostatic pressing molding bin 3. A rubber cylinder 7 is arranged between the first guide cylinder 4 and the cover plate 14, and the inner cavity of the rubber cylinder 7 is set as a filling cavity 8 for filling ceramic powder. The first guide cylinder 4 is slidably matched with a base 6 inside, and the lower surface of the base 6 is connected to the telescopic end of the first electric telescopic rod 5. A core rod 9 is installed in the middle of the upper surface of the base 6, and the top of the core rod 9 extends upward to be flush with the top of the rubber cylinder 7. A feeding cavity 13 connected to the filling cavity 8 is opened on the cover plate 14, and a matching pressure cover 15 is embedded in the feeding cavity 13. It can be understood that the ceramic powder can be conveniently loaded into the filling chamber 8 through the feeding chamber 13. After the loading is completed and the pressure cover 15 is put on, the ceramic powder can be evenly pressurized by the hydraulic oil in the isostatic pressing chamber 3 to obtain a ceramic tube; then the formed ceramic tube is automatically pushed out of the isostatic pressing device through the first electric telescopic rod 5; compared with the prior art, the granulated ceramic powder is first loaded into a rubber mold, and then the rubber mold is placed in the isostatic pressing equipment for high-pressure pressing and molding. After molding, the rubber mold needs to be manually removed from the isostatic pressing equipment. The present application can significantly improve the production efficiency of ceramic tubes.

[0038] See also Figure 1 , Figure 5 and Figure 6 , the two sides of the feeding chamber 13 are connected with an exhaust pipe 18 and a feeding pipe 19 respectively, the end of the exhaust pipe 18 away from the feeding chamber 13 is connected to the vacuum pump 17, and the end of the feeding pipe 19 away from the feeding chamber 13 is connected to the feeding bin 20. The vacuum pump 17 evacuates the feeding chamber 13 and the filling chamber 8 through the exhaust pipe 18, so that the powder in the feeding bin 20 can quickly fall into the filling chamber 8 under the action of negative pressure, thereby quickly completing the loading of the ceramic powder. A storage bin 25 is fixedly connected to the feeding bin 20 through a bracket. A feeding pipe 24 is arranged at the bottom of the storage bin 25, and a rotating roller 27 is arranged inside the feeding pipe 24. Blades 28 are distributed in an annular array on the rotating roller 27, and a rubber block in contact with the inner wall of the feeding pipe 24 is arranged at the end of the blade 28. The roller shaft of the rotating roller 27 passes through the feeding pipe 24 and is respectively connected to the output end of the second motor 26 and the vibration device 29. When the second motor 26 drives the rotating roller 27 to rotate, the powder is discharged from the discharge pipe 24 under the guidance of the blades 28 , so that the powder falls into the feed bin 20 .

[0039] See also Figure 4 and Figure 5The vibration device 29 includes a rotating wheel 291 fixedly connected to the roller shaft of the rotating roller 27, a rotating rod 292 is rotatably connected to the rotating wheel 291 at an eccentric position, and a rotating shaft 293 is fixedly connected to the end of the rotating rod 292 away from the rotating wheel 291, and the rotating shaft 293 is rotatably connected to the bottom end of the lifting rod 294. Specifically, the rotating shaft 293 can be rotatably connected to the fixed cylinder through a bearing, and the fixed cylinder is arranged at the bottom end of the lifting rod 294. The middle part of the lifting rod 294 is slidably matched with the limiting cylinder 295 installed on the storage bin 25, and the top end of the lifting rod 294 passes through the convex plate 297 installed on the storage bin 25 and is fixedly connected to the vibration block 296. When the rotating rod 292 rotates to the lowest end of the rotating wheel 291, the bottom end of the vibration block 296 fits with the upper surface of the convex plate 297. When the second motor 26 drives the rotating roller 27 to rotate, it can drive the rotating wheel 291 to rotate synchronously. Under the cooperation of the rotating wheel 291, the rotating rod 292, the rotating shaft 293, the lifting rod 294, the limiting cylinder 295 and the vibration block 296, it can drive the vibration block 296 to continuously hit the convex plate 297, thereby causing the convex plate 297 to vibrate during the discharge process, and transmit the vibration to the discharge pipe 24, making it more convenient to discharge the powder from the discharge pipe 24. Since the present application drives the blade 28 to rotate to achieve the discharge of the powder by the second motor 26, compared with the discharge of the powder by the electric control valve, the present application facilitates the discharge of the powder from the discharge pipe 24 on the one hand, and can synchronously drive the vibration block 296 to continuously hit the convex plate 297 on the other hand, continuously generating vibration during the discharge process of the powder, organically combining the discharge and vibration, making it more convenient to discharge the powder from the discharge pipe 24.

[0040] See also Figure 7 , a partition 22 is provided in the feed bin 20, a weighing device 23 is installed on the partition 22, and both ends of the partition 22 are rotatably connected to the inner wall of the feed bin 20, and the partition 22 is driven to rotate by the first motor 21. When the powder falls from the feeding pipe 24 into the feed bin 20, it will fall onto the partition 22, and the weighing device 23 on the partition 22 will weigh the powder. When it is monitored that the weight of the powder in the feed bin 20 reaches the preset weight, the second motor 26 is turned off, so that the rotating roller 27 stops rotating, and the feeding into the feed bin 20 is stopped. At this time, the partition 22 is driven to rotate by the first motor 21, and the vacuum pump 17 is used to evacuate the feeding chamber 13 and the filling chamber 8 through the exhaust pipe 18, so that the powder in the feed bin 20 is discharged into the filling chamber 8 under the action of negative pressure.

[0041] See also Figure 1 and Figure 2, since the hydraulic oil pressure in the isostatic pressing chamber 3 is constant and evenly transmitted to all directions, it is convenient to set multiple rubber cylinders 7 in the isostatic pressing chamber 3. Exemplarily, two first guide cylinders 4 and rubber cylinders 7 are arranged in the isostatic pressing chamber 3, and a corresponding number of feeding chambers 13 and a corresponding number of pressure caps 15 are arranged on the cover plate 14. The feeding chamber 13 located on the right is connected to the exhaust pipe 18, and the feeding chamber 13 located on the left is connected to the feed pipe 19. The cover plate 14 is provided with a first air channel 141 and a first material channel 142 between adjacent feeding chambers 13, and the pressure cap 15 is provided with a second air channel 151 and a second material channel 152. When the pressure cap 15 is completely embedded in the feeding chamber 13, the central axes of the first air channel 141 and the second air channel 151 coincide with each other, and the central axes of the first material channel 142 and the second material channel 152 coincide with each other. By overlapping the first air channel 141 opened on the cover plate 14 with the second air channel 151 opened on the pressure cover 15, or the first material channel 142 opened on the cover plate 14 with the second material channel 152 opened on the pressure cover 15, it is convenient for the powder in the feed bin 20 to fall into each filling cavity 8 in sequence under the action of negative pressure, thereby facilitating the filling of ceramic powder into each filling cavity 8 in sequence, and then facilitating the one-time isostatic pressing of multiple ceramic tubes, thereby further improving the production efficiency of ceramic tubes.

[0042] Preferably, the upper surface of the pressure cover 15 is connected to the telescopic end of the second electric telescopic rod 16, and the second electric telescopic rod 16 is installed on the cover plate 14 through a bracket. The pressure cover 15 is driven to move up and down by the extension and contraction of the second electric telescopic rod 16, so that the pressure cover 15 is embedded in the feeding chamber 13 and detached from the feeding chamber 13. A groove 10 is provided at the upper end of the core rod 9, and a first spring 11 is fixedly connected to the bottom wall of the groove 10. An extension rod 12 is slidably matched at the upper end of the groove 10. The upper end of the first spring 11 is fixedly connected to the bottom end of the extension rod 12. When the second air channel 151 on the pressure cover 15 enters the feeding chamber 13, the upper end of the extension rod 12 fits with the pressure cover 15 under the action of the first spring 11. At this time, the bottom end of the pressure cover 15 is higher than the first air channel 141 and the first material channel 142. The pressure cover 15 will not hinder the powder in the feed bin 20 from entering the feeding chamber 13 under the action of the negative pressure. Due to the extension rod The upper end of 12 is fitted with the pressure cover 15 under the action of the first spring 11, so as to prevent the ceramic powder from accumulating on the top of the core rod 9 when the powder is filled into the filling chamber 8. After the pressure cover 15 presses and compacts the ceramic powder, the pressure cover 15 cannot be completely embedded in the feeding chamber 13 due to the restriction of this part of the ceramic powder, so that the first air channel 141 opened on the cover plate 14 and the second air channel 151 opened on the pressure cover 15 or the first material channel 142 opened on the cover plate 14 and the second material channel 152 opened on the pressure cover 15 cannot overlap with each other, thereby affecting the filling of ceramic powder into other filling chambers 8.

[0043] It should be noted that, in the present application, the second air channel 151 on the pressure cover 15 enters into the feeding chamber 13, and the bottom end of the pressure cover 15 is higher than the first air channel 141. Therefore, in order to fill the powder into the filling chamber 8 corresponding to the feeding chamber 13, when it is observed that the second air channel 151 on the pressure cover 15 has just completely entered into the feeding chamber 13, the second electric telescopic rod 16 stops driving the pressure cover 15 to move downward.

[0044] Furthermore, a vibration motor 30 is installed on the outer wall of the first electric telescopic rod 5. During the powder filling process, after the vibration motor 30 is started, the vibration motor 30 transmits vibration to the base 6, so that the powder is evenly distributed in the filling cavity 8, thereby improving the molding quality of the ceramic tube.

[0045] The present invention also provides a special ceramic isostatic pressing process based on the above device, which specifically includes the following steps:

[0046] The second electric telescopic rod 16 drives the gland 15 to move up and down, so that the first air channel 141 opened on the cover plate 14 and the second air channel 151 opened on the gland 15 or the first material channel 142 opened on the cover plate 14 and the second material channel 152 opened on the gland 15 overlap;

[0047] Each feeding cavity 13 and the filling cavity 8 is vacuumed in turn, so that the powder in the feeding bin 20 falls into each filling cavity 8 in turn under the action of negative pressure, until the powder fills each filling cavity 8 in turn, and the pressure cover 15 is embedded in the feeding cavity 13 corresponding to the filled filling cavity 8 to compact the powder in the filling cavity 8;

[0048] After the powder in each filling cavity 8 is compacted, the hydraulic oil in the pressure chamber 2 and the isostatic pressing chamber 3 is pressurized by the loading device 32; the hydraulic oil in the isostatic pressing chamber 3 uniformly pressurizes each rubber tube 7 from all directions, and multiple ceramic tubes are produced at one time;

[0049] Release the pressure of the hydraulic oil in the pressure chamber 2 and the isostatic pressing chamber 3, and remove the gland 15;

[0050] The base 6 is pushed upward by the first electric telescopic rod 5 to drive the formed ceramic tube to extend out of the isostatic pressing device, so as to facilitate the removal of the ceramic tube.

[0051] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the invention.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0053] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present embodiment application. The appearance of this phrase in various positions in the specification is not necessarily the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0054] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A special ceramic isostatic pressing device, characterized in that: The invention comprises a base (1), wherein the upper surface of the base (1) is provided with a pressure chamber (2) and an isostatic pressing chamber (3) which are interconnected in sequence, wherein a loading device (32) is provided in the pressure chamber (2) to pressurize the hydraulic oil in the pressure chamber (2) and the isostatic pressing chamber (3), wherein a first guide cylinder (4) is installed at the bottom of the isostatic pressing chamber (3), and a cover plate (14) is installed at the top of the isostatic pressing chamber (3), wherein a rubber cylinder (7) is provided between the first guide cylinder (4) and the cover plate (14), and wherein the ...). The inner cavity of the rubber cylinder (7) is configured as a filling cavity (8), the first guide cylinder (4) is slidably fitted with a base (6), the lower surface of the base (6) is connected to the telescopic end of the first electric telescopic rod (5), a core rod (9) is installed in the middle of the upper surface of the base (6), the top of the core rod (9) extends upward to be flush with the top of the rubber cylinder (7), the cover plate (14) is provided with a feeding cavity (13) connected to the filling cavity (8), and a matching pressure cover (15) is embedded in the feeding cavity (13); The two sides of the feeding chamber (13) are respectively connected with an exhaust pipe (18) and a feed pipe (19); the end of the exhaust pipe (18) away from the feeding chamber (13) is connected to a vacuum pump (17); the end of the feed pipe (19) away from the feeding chamber (13) is connected to a feed bin (20); A plurality of first guide cylinders (4) and rubber cylinders (7) are arranged in the isostatic pressing chamber (3); a corresponding number of feeding chambers (13) and a corresponding number of pressure covers (15) are provided on the cover plate (14); a first air channel (141) and a first material channel (142) are provided on the cover plate (14) between adjacent feeding chambers (13); a second air channel (151) and a second material channel (152) are provided on the pressure cover (15); when the pressure cover (15) is completely embedded in the feeding chamber (13), the central axes of the first air channel (141) and the second air channel (151) coincide with each other, and the central axes of the first material channel (142) and the second material channel (152) coincide with each other; and the exhaust pipe (18) and the feed pipe (19) are respectively connected to the feeding chambers (13) located on both sides; The upper surface of the gland (15) is connected to the telescopic end of the second electric telescopic rod (16), and the second electric telescopic rod (16) is mounted on the cover plate (14) via a bracket; A groove (10) is provided at the upper end of the core rod (9), a first spring (11) is fixedly connected to the bottom wall of the groove (10), an extension rod (12) is slidably fitted at the upper end of the groove (10), the upper end of the first spring (11) is fixedly connected to the bottom end of the extension rod (12), and when the second air passage (151) of the pressure cover (15) enters the feeding chamber (13), the upper end of the extension rod (12) fits with the pressure cover (15) under the action of the first spring (11).

2. The special ceramic isostatic pressing device according to claim 1, characterized in that: A partition (22) is provided in the feed bin (20), a weighing device (23) is mounted on the partition (22), both ends of the partition (22) are rotatably connected to the inner wall of the feed bin (20), and the partition (22) is driven to rotate by a first motor (21).

3. The special ceramic isostatic pressing device according to claim 2, characterized in that: A storage bin (25) is arranged directly above the feed bin (20), a feed pipe (24) is arranged at the bottom of the storage bin (25), a rotating roller (27) is arranged inside the feed pipe (24), blades (28) are distributed in an annular array on the rotating roller (27), and rubber blocks are arranged at the ends of the blades (28) to contact the inner wall of the feed pipe (24), and the two ends of the rotating roller (27) pass through the feed pipe (24) and are respectively fixedly connected to the output end of the second motor (26) and the rotating wheel (291), and a rotating rod (292) is rotatably connected at an eccentric position of the rotating wheel (291). ), one end of the rotating rod (292) away from the rotating wheel (291) is fixedly connected to a rotating shaft (293), the rotating shaft (293) is rotatably connected to the bottom end of the lifting rod (294), the middle part of the lifting rod (294) is slidably matched with a limiting cylinder (295) installed on the material storage bin (25), the top end of the lifting rod (294) passes through a convex plate (297) installed on the material storage bin (25) and is fixedly connected to a vibration block (296), when the rotating rod (292) rotates to the lowest end of the rotating wheel (291), the bottom end of the vibration block (296) is in contact with the upper surface of the convex plate (297).

4. The special ceramic isostatic pressing device according to claim 1, characterized in that: The loading device (32) comprises a loading frame (31) mounted on the upper end of the pressure chamber (2); a third motor (321) is mounted on a side wall of the loading frame (31); an output end of the third motor (321) is fixedly connected to a first bevel gear (322); the first bevel gear (322) is meshingly connected to a second bevel gear (323); the second bevel gear (323) is mounted on the outer surface of a threaded block (324); the threaded block (324) is rotatably connected to a support plate (325); a threaded rod (326) is threadedly connected to the inner surface of the threaded block (324); a guide plate (327) is fixedly connected to the bottom end of the threaded rod (326); the guide plate (327 is slidably matched with a second guide cylinder (328) mounted on the top wall of the pressure chamber (2); and the guide plate (327) is fixedly connected to a pressure plate (329) via a connecting rod.

5. A special ceramic isostatic pressing device according to any one of claims 1 to 4, characterized in that: A vibration motor (30) is mounted on the outer wall of the first electric telescopic rod (5).

6. A special ceramic isostatic pressing process based on the device according to claim 1, characterized in that: The specific steps include: Filling the filling cavity (8) with powder through the feeding cavity (13) until the filling cavity (8) is filled with the powder, and then inserting the pressure cover (15) into the feeding cavity (13) to press and compact the powder in the filling cavity (8); The hydraulic oil in the pressure chamber (2) and the isostatic pressing chamber (3) is pressurized by a loading device (32); the hydraulic oil in the isostatic pressing chamber (3) uniformly pressurizes the rubber cylinder (7) from all directions to produce a ceramic tube; Relieve the pressure of the hydraulic oil in the pressure chamber (2) and the isostatic pressing chamber (3), and remove the gland (15); The base (6) is pushed upward by the first electric telescopic rod (5), driving the formed ceramic tube to extend out of the isostatic pressing device, so as to facilitate the removal of the ceramic tube.

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