A circulating feeding device for a powder press

Abstract

The application discloses a kind of circulating feeders for powder press, belong to powder press feed field, including powder press feed round table and pressing table, the bottom of powder press feed round table is provided with servo motor, the bottom of pressing table is provided with hydraulic pressing column, the top of powder press feed round table is provided with circulating feed assembly, circulating feed assembly is rotated by servo motor Power supply, circulating feed assembly is composed of weighing mechanism and rotating pushing mechanism, the inside of powder press feed round table is provided with rotating smoothing mechanism.The application is weighed after a variety of ingredients, respectively by rotating pushing mechanism is transported to the pressing chute at the center of pressing feed round table, then by rotating motor rotating smoothing rod synchronous rotation is driven, so that rotating smoothing rod is flattened to the top layer of powder, avoid due to pushing mechanism scraping process gap in multilayer junction, reduce the emergence of the problem of finished product qualification rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder press feeding, in particular to a circulating feeding device for a powder press. BACKGROUND

[0002] When making ceramics with zirconium dioxide as raw material, the powder with zirconium dioxide as main material is often pressed into a cake by a powder press to facilitate the subsequent transportation and processing of the pressed blank. Zirconium dioxide is the main oxide of zirconium, has high wear resistance, high melting point, corrosion resistance, non-conductivity, non-magnetic, and other excellent characteristics, and has low thermal expansion coefficient, high refractive index, and good thermal shock resistance. It is an important emerging material in the fields of high-temperature resistant materials, structural ceramics, and functional ceramics.

[0003] When the composite ceramic with zirconium dioxide as raw material is pressed, the sintered blank is often fed in a layered manner. The current process for layered feeding of zirconium dioxide composite ceramic is as follows: first, each ingredient is weighed, and the weighed ingredients are fed to the top of the pressing platform by a pneumatic conveying mechanism. Then, the pushing mechanism pushes the weighed ingredients into the pressing groove, and then the pushing mechanism is withdrawn to the original position. At this time, the top of the layer of ingredients is scraped flat, and the lifting platform inside the bottom wall of the pressing groove is lowered to lower the layer of ingredients to the specified position. After the next layer of ingredients is fed to the pressing groove, the multiple layers of ingredients are simultaneously pressed by the hydraulic pressing mechanism, and the pressing operation is completed.

[0004] However, during the downward movement of the ingredients, the pushing mechanism directly scrapes the top of the ingredients flat, which may cause the powder on the top to be missing or accumulated in certain areas due to the excessive speed or slow speed of the side wall of the pushing mechanism. This may cause gaps in the contact surface when pressing the multi-layer composite ceramic blank, reducing the yield of the finished product.

[0005] Therefore, we propose a circulating feeding device for a powder press. SUMMARY

[0006] The purpose of the present application is to solve the problem of missing or accumulated powder in certain areas on the top of the ingredients due to the excessive speed or slow speed of the side wall of the pushing mechanism when pressing the multi-layer composite ceramic with zirconium dioxide as raw material, which may cause gaps in the multi-layer connection and reduce the yield of the finished product. A circulating feeding device for a powder press is proposed.

[0007] To achieve the above purpose, the present application adopts the following technical solutions:

[0008] A circulating feeding device for a powder press includes a powder feeding disc and a pressing table. A servo motor is installed at the bottom of the powder feeding disc, and a hydraulic pressing column is installed at the bottom of the pressing table. A circulating feeding component is installed at the top of the powder feeding disc. The circulating feeding component is powered by the servo motor and consists of a weighing mechanism and a rotating pushing mechanism. A rotating smoothing mechanism is installed inside the powder feeding disc.

[0009] The weighing mechanism includes a rotating feeding platform rotatably connected to the outside of the powder feeding platform, a star-shaped conveyor box slidably connected to the top of the rotating feeding platform, an injection pipe at the top of the star-shaped conveyor box, a closed solenoid valve at the bottom of the injection pipe, a weighing platform on the inner wall of the star-shaped conveyor box, and a weighing sleeve inside the star-shaped conveyor box.

[0010] The rotary pushing mechanism includes an arc-shaped drive groove disposed on the top of the powder pressing and feeding disc, a drive switch disposed on the inner wall of the arc-shaped drive groove, a hydraulic pushing cylinder disposed on the outer side of the powder pressing and feeding disc, a hydraulic pushing rod disposed on the hydraulic pushing cylinder near the center of the powder pressing and feeding disc, a drive motor disposed on the inner wall of the weighing sleeve, and a drive plate fixed to the output shaft of the drive motor, and a spring return push plate disposed inside the star-shaped conveyor box.

[0011] The rotary smoothing mechanism includes an extrusion sleeve that slides on the inner wall of the powder feeding truncated cone. A pressing auxiliary hydraulic cylinder is provided at the bottom of the extrusion sleeve. A rotary smoothing rod is provided on the inner side of the extrusion sleeve. A rotating smoothing rod is connected to the rotary smoothing rod. A rotary motor is provided at the bottom of the rotary smoothing rod, and a rotation limit sleeve is provided at the bottom of the rotating smoothing rod.

[0012] Preferably, a weighing stabilizing platform is provided on the outer side of the powder feeding truss, and a weighing groove is provided on the top of the weighing stabilizing platform, and the top of the weighing stabilizing platform is in intermittent contact with the bottom of the weighing sleeve.

[0013] Preferably, a weighing crossbar is fixed to the outer side of the weighing sleeve and slidably connected to the inner wall of the star-emitting conveyor box. A weighing plate is provided at the bottom of the weighing crossbar and placed on the top of the weighing platform. Two weight scales are provided at the bottom of the weighing plate, and a lifting space is provided between the two weight scales.

[0014] Preferably, the inner diameter of the arc-shaped drive groove decreases in the clockwise rotation direction and increases in the counterclockwise rotation direction, and the bottom of the star-emitting conveyor box is provided with a sliding drive shaft that contacts the drive switch.

[0015] Preferably, the inner side of the hydraulic push rod is provided with a stabilizing suction cup that adheres to the outer side of the spring return push plate, and the outer side of the spring return push plate is provided with a limiting extrusion groove that is pressed against the sliding drive shaft.

[0016] Preferably, the drive motor is located at the axis of the weighing sleeve, the drive plate is slidably connected to the inner wall of the weighing sleeve, the top of the weighing sleeve is provided with a filling port, the side wall of the weighing sleeve is provided with a discharge port, and the inner wall of the weighing sleeve is fixed with a discharge baffle plate located at the top of the discharge port.

[0017] Preferably, the spring reset push plate is provided with a lifting compression plate inside, the bottom of the lifting compression plate is provided with a lifting spring, and the top of the lifting compression plate is slidably connected to the inner top wall of the star-emitting conveyor box.

[0018] Preferably, the outer surface of the rotating smoothing rod is provided with a transmission worm gear, the inner side of the rotating smoothing rod is provided with a transmission worm wheel that is connected to the transmission worm gear, and the top of the rotating smoothing rod is provided with a sealing rod, the outer surface of the sealing rod being in contact with the inner side of the rotating smoothing rod.

[0019] Preferably, a sealing rubber ring is provided at the bottom of the rotation limiting sleeve, and a sealing bracket is provided on the outer surface of the sealing rubber ring.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. By using a combination of extrusion sleeves, pressure auxiliary hydraulic cylinders, and rotary leveling rods, after the various ingredients are weighed, the rotary pushing mechanism transports the ingredients to the pressure chute at the center of the pressure feeding platform. Then, the rotary motor drives the rotary leveling rod to rotate synchronously, so that the rotating leveling rod smooths the top layer of powder, avoiding the problem of gaps appearing at the joints of multiple layers during the leveling process of the pushing mechanism, which would reduce the finished product qualification rate.

[0022] 2. By coordinating the use of a rotating feeding platform, a star-shaped conveyor box, and a feeding pipe, when powder needs to be conveyed into the star-shaped conveyor box, the servo motor drives the rotating feeding platform to rotate counterclockwise to the bottom of the feeding pipe. The injected powder is then weighed by a weighing sleeve. After weighing, the platform rotates clockwise to the rotating pushing mechanism to complete the rotary weighing operation. When multiple star-shaped conveyor boxes need to be conveyed, the platform rotates counterclockwise again to the bottom of the feeding pipe, achieving a convenient and cyclical feeding effect.

[0023] 3. By setting up an arc-shaped drive groove, a hydraulic push cylinder, and a drive motor in coordination, after the powder is accurately weighed by the weighing mechanism, the drive motor drives the drive plate to transport the material in the symmetrical weighing sleeve to the inside of the star-shaped conveyor box. This avoids incomplete pouring and inaccurate powder layer weight due to powder accumulation on the cylinder wall during the pouring process. At the same time, the spring-reset push plate slides with the inner wall of the star-shaped conveyor box to concentrate the conveyed powder. This avoids the need for a large pushing displacement when conveying to the pressing chute due to the large conveying space, reducing the pushing time of the hydraulic push cylinder and improving pushing efficiency while increasing the service life of the hydraulic push cylinder. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a circulating feeding device for a powder press proposed in this invention;

[0025] Figure 2 This is a schematic diagram of the weighing mechanism and the rotary pushing mechanism of a circulating feeding device for a powder press proposed in this invention;

[0026] Figure 3 This is an exploded view of the overall structure of a circulating feeding device for a powder press proposed in this invention;

[0027] Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle;

[0028] Figure 5 This is a schematic diagram of the arc-shaped drive groove structure of a circulating feeding device for a powder press proposed in this invention;

[0029] Figure 6 This is a schematic diagram of the connection between the hydraulic push rod and the spring return push plate structure of a circulating feeding device for a powder press proposed in this invention;

[0030] Figure 7 This is a schematic diagram of the internal structure of the weighing sleeve of a circulating feeding device for a powder press proposed in this invention;

[0031] Figure 8 For the present invention Figure 3 Enlarged view of the structure at point B;

[0032] Figure 9 This is a schematic diagram of the rotating smoothing rod of a circulating feeding device for a powder press conforming to the outer surface of a sealing rod, as proposed in this invention.

[0033] Figure 10 This is a schematic diagram of the rotating smoothing rod structure of a circulating feeding device for a powder press proposed in this invention, unfolded to a horizontal state;

[0034] Figure 11This is a schematic diagram of the transmission worm and transmission worm wheel structure of a circulating feeding device for a powder press proposed in this invention.

[0035] In the diagram: 1. Powder feeding frustum; 11. Weighing stabilizing platform; 2. Pressing platform; 3. Weighing mechanism; 31. Rotary feeding platform; 32. Star-shaped conveyor box; 33. Injection pipe; 34. Weighing platform; 35. Weighing sleeve; 351. Weighing crossbar; 352. Weighing plate; 36. Sliding drive shaft; 4. Rotary pushing mechanism; 41. Arc-shaped drive groove; 42. Hydraulic pushing cylinder; 43. Hydraulic pushing rod; 431. Stabilizing suction cup; 44. Drive... 45. Drive motor; 46. Drive plate; 47. Spring return push plate; 48. Lifting compression plate; 49. Lifting spring; 40. Discharge partition; 51. Rotary smoothing mechanism; 52. Extrusion sleeve; 53. Pressing auxiliary hydraulic cylinder; 54. Rotary smoothing rod; 55. Transmission worm gear; 56. Transmission worm wheel; 57. Sealing rod; 58. Rotary smoothing rod; 59. Rotary limit sleeve; 50. Sealing rubber ring; 51. Sealing bracket. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Reference Figures 1-11 A circulating feeding device for a powder press includes a powder feeding disc 1 and a pressing table 2. A servo motor is installed at the bottom of the powder feeding disc 1, a hydraulic pressing column is installed at the bottom of the pressing table 2, a circulating feeding component is installed at the top of the powder feeding disc 1, the circulating feeding component is powered by the servo motor, the circulating feeding component is composed of a weighing mechanism 3 and a rotating pushing mechanism 4, and a rotating smoothing mechanism 5 is installed inside the powder feeding disc 1.

[0038] Through the above technical solution, a pressing chute is set at the center of the pressing and feeding disc 1, and a pressing hydraulic component is set on the top of the pressing table 2 to generate downward pressure on the hydraulic pressing column. Before pressing the powder, the weight of each proportion of powder is accurately weighed by the weighing mechanism 3. After weighing, the powder is pushed to the pressing chute by the rotating pushing mechanism 4. During this process, the top of each layer of powder is smoothed by the rotating leveling mechanism 5 to avoid gaps between the powder layers due to unevenness during the pressing process, which would reduce the qualification rate of the finished product.

[0039] The weighing mechanism 3 includes a rotating feeding platform 31 rotatably connected to the outside of the powder feeding platform 1. A star conveyor box 32 is slidably connected to the top of the rotating feeding platform 31. A feeding pipe 33 is provided on the top of the star conveyor box 32. A closed solenoid valve is provided at the bottom of the feeding pipe 33. A weighing platform 34 is provided on the inner wall of the star conveyor box 32. A weighing sleeve 35 is provided inside the star conveyor box 32.

[0040] With the above technical solution, when it is necessary to feed powder materials, the servo motor is started to drive the rotating feeding table 31 to rotate counterclockwise to the bottom of the injection pipe 33. Then, the powder to be pressed is injected into the weighing sleeve 35 through the injection pipe 33. During this period, the injected material is weighed by the weighing table 34. After the weight reaches the standard, the closing solenoid valve is closed to stop feeding and complete the feeding and weighing operation.

[0041] Specifically, a weighing stabilizing platform 11 is provided on the outer side of the powder feeding disc 1. The top of the weighing stabilizing platform 11 is provided with a weighing groove, and the top of the weighing stabilizing platform 11 is in intermittent contact with the bottom of the weighing sleeve 35. A weighing crossbar 351 that is slidably connected to the inner wall of the star conveyor box 32 is fixed on the outer side of the weighing sleeve 35. A weighing plate 352 that is placed on the top of the weighing platform 34 is provided at the bottom of the weighing crossbar 351. Two weight scales are provided at the bottom of the weighing plate 352, and a lifting space is provided between the two weight scales.

[0042] With the above technical solution, the weighing groove is set at the bottom of the injection pipe 33. When the weighing sleeve 35 rotates counterclockwise to the weighing groove, the top of the weighing stabilizing platform 11 is supported by the asymmetrical weighing sleeve 35, so that the weighing plate 352 is placed on the top of the weighing scale. The weight of the injected material is obtained by the total value of the changes in the weighing data at the top of the two weighing scales. When the weighing sleeve 35 rotates clockwise to contact the top of the weighing stabilizing platform 11, the weighing stabilizing platform 11 provides stable support to the bottom of the symmetrical weighing sleeve 35. It is not necessary to weigh the symmetrical weighing sleeve 35 all the time, which reduces the weighing time of the weighing platform 34 and achieves the effect of extending its service life.

[0043] The rotary pushing mechanism 4 includes an arc-shaped drive groove 41 located on the top of the powder feeding disc 1. A drive switch is installed on the inner wall of the arc-shaped drive groove 41. A hydraulic pushing cylinder 42 is installed on the outer side of the powder feeding disc 1. A hydraulic pushing rod 43 is installed on the hydraulic pushing cylinder 42 near the center of the powder feeding disc 1. A drive motor 44 is installed on the inner wall of the weighing sleeve 35, and a driving plate 45 is fixed to the output shaft of the drive motor 44. A spring-reset push plate 4 is installed inside the star-shaped conveyor box 32. 6. The drive motor 44 is located at the shaft of the weighing sleeve 35. The driving plate 45 is slidably connected to the inner wall of the weighing sleeve 35. The top of the weighing sleeve 35 is provided with a feeding port, and the side wall of the weighing sleeve 35 is provided with a discharge port. The inner wall of the weighing sleeve 35 is fixed with a discharge baffle 47 located at the top of the discharge port. The baffle 47 works with the driving plate 45 to drive the weighed material from the discharge port into the star conveyor box 32, so as to avoid the accumulation of powder in the weighing cylinder, which would result in the unqualified weight of the powder layer supplied.

[0044] With the above technical solution, when the star-shaped conveyor box 32 rotates to the inside of the hydraulic push rod 43, the hydraulic push cylinder 42 is activated, which drives the spring return push plate 46 to move towards the pressing chute. During this period, the drive motor 44 drives the drive plate 45 to rotate, which transports the material contained in the weighing sleeve 35 to the space enclosed by the star-shaped conveyor box 32 and the powder pressing and feeding platform 1, and the powder is centrally conveyed by the spring return push plate 46.

[0045] Specifically, the inner diameter of the arc-shaped drive groove 41 decreases in the clockwise rotation direction and increases in the counterclockwise rotation direction. The bottom of the star-shaped conveyor box 32 is provided with a sliding drive shaft 36 that contacts the drive switch. The inner side of the hydraulic push rod 43 is provided with a stabilizing suction cup 431 that adheres to the outer side of the spring return push plate 46. The outer side of the spring return push plate 46 is provided with a limiting compression groove that presses against the sliding drive shaft 36. The inside of the spring return push plate 46 is provided with a lifting compression plate 461. The bottom of the lifting compression plate 461 is provided with a lifting spring 462, and the top of the lifting compression plate 461 is slidably connected to the inner top wall of the star-shaped conveyor box 32.

[0046] Through the above technical solution, the sliding drive shaft 36 at the bottom of the star-shaped conveyor box 32 slides with the arc-shaped drive groove 41, which can squeeze the outer side of the spring reset push plate 46. That is, when the star-shaped conveyor box 32 rotates clockwise, the inner diameter of the arc-shaped drive groove 41 is reduced, which drives the sliding drive shaft 36 to squeeze the outer side of the spring reset push plate 46, and the top of the spring reset push plate 46 is attached to the top of the star-shaped conveyor box 32, completing the operation of sealing the powder space. Then, the hydraulic push cylinder 42 drives the hydraulic push rod 43 to move the spring reset push plate 46 to the center position of the powder feeding platform 1. When the hydraulic push cylinder 42 drives the hydraulic push rod 43 to reset, the stabilizing suction cup 431 drives the spring reset push plate 46 to move outward, so that the spring reset push plate 46 moves to the position squeezed with the sliding drive shaft 36 and releases the suction state.

[0047] The rotary smoothing mechanism 5 includes an extrusion sleeve 51 that slides on the inner wall of the powder feeding truncated cone 1. A pressing auxiliary hydraulic cylinder 52 is provided at the bottom of the extrusion sleeve 51. A rotary smoothing rod 53 is provided on the inner side of the extrusion sleeve 51. A rotary motor is provided at the bottom of the rotary smoothing rod 53. A rotating smoothing rod 54 is drivenly connected to the rotary smoothing rod 53. A transmission worm gear 531 is provided on the outer surface of the rotary smoothing rod 53. A transmission worm wheel 532 that is drivenly connected to the transmission worm gear 531 is provided on the inner side of the rotating smoothing rod 54. A sealing rod 533 is provided on the top of the rotary smoothing rod 53, and the outer surface of the sealing rod 533 is in contact with the inner side of the rotating smoothing rod 54. A rotation limit sleeve 55 is provided at the bottom of the rotating smoothing rod 54.

[0048] Through the above technical solution, when different powder layers are put into the powder pressing groove at the center of the powder pressing feeding platform 1, the pressing auxiliary hydraulic cylinder 52 is started to drive the extrusion sleeve 51 to descend to the smoothing height. Then, the rotary motor is started to drive the rotary smoothing rod 53 to rotate clockwise, driving the rotary smoothing rod 54 to unfold outward until it is horizontally attached to the top of the powder layer. Then, the rotation angle of the rotary smoothing rod 54 is limited by the rotary limiting sleeve 55, so that the rotary smoothing rod 54 and the rotary smoothing rod 53 are engaged. Then, through the rotation of the rotary smoothing rod 53, the rotary smoothing rod 54 is driven to rotate and smooth in the horizontal direction, completing the rotary smoothing operation on the top of the powder layer.

[0049] Furthermore, when the bottom layer of powder and the next layer of powder are pushed to the central storage trough of the powder feeding platform 1, the rotating smoothing rod 54 is attached to the sealing rod 533 fixed at the top of the rotating smoothing rod 53. At this time, the powder will not be obstructed during the descent. Similarly, when the powder is pressed after the multiple layers of powder are smoothed, the hydraulic pressing column set in the hollow is pressed down and will not be obstructed when passing through the closed sealing rod 533 and the rotating smoothing rod 53, thus not affecting the pressing process of the powder.

[0050] Specifically, a sealing rubber ring 551 is provided at the bottom of the rotating limit sleeve 55, and a sealing bracket 552 is provided on the outer surface of the sealing rubber ring 551.

[0051] Through the above technical solution, when the rotating smoothing rod 54 is not limited by the rotating limiting sleeve 55, the rotational driving force generated by the rotating motor driving the rotating smoothing rod 53 to rotate on the sealing rubber ring 551 is small. When the rotating smoothing rod 54 is limited, the rotational power of the rotating smoothing rod 53 is delivered to the rotating limiting sleeve 55 to the maximum extent. At this time, the sealing rubber ring 551 is driven to rotate on the inner wall of the sealing bracket 552, so that the rotating smoothing rod 54 at the top rotates in the horizontal plane and smooths the top of the sealing layer.

[0052] Furthermore, when it is necessary to retract the rotating smoothing rod 54, the rotating smoothing rod 53 is rotated in the same direction by driving the rotating motor in the opposite direction, so that the rotating smoothing rod 54 rotates towards the sealing rod 533 until it is in contact with the sealing rod 533, thereby retracting the rotating smoothing mechanism 5 to avoid affecting the powder conveying to the pressing chute and the pressing process.

[0053] Before pressing ceramic blanks based on zirconium dioxide powder, this invention requires three working processes: weighing and feeding, rotating and pushing of powder, and rotating and smoothing of the top of the powder layer. The weighing and feeding process is as follows: when the servo motor drives the rotating feeding table 31 to rotate counterclockwise, it drives the star conveyor box 32 to move outward, moving the weighing sleeve 35 to the bottom of the injection tube 33. Then, the weighing table 34 weighs the powder contained in the weighing sleeve 35. After the weight reaches the standard, the closing solenoid valve is closed to seal the bottom of the injection tube 33, thus completing the powder weighing operation.

[0054] Based on the above, four star-shaped conveyor boxes 32 are provided on the top of the rotary feeding table 31. When the rotary feeding table 31 rotates counterclockwise by 45 degrees, the bottom of the weighing sleeve 35 rotates to the weighing groove opened on the top of the weighing stable table 11. That is, the weight of the material in the weighing sleeve 35 is weighed through the weighing table 34. After the weighing and feeding are completed, the servo motor drives the rotary feeding table 31 to rotate clockwise by 45 degrees, causing the bottom of the weighing sleeve 35 to be pressed against the top of the weighing stable table 11 and to break away from the weighing state.

[0055] Furthermore, when the weighing sleeve 35 rises to its highest point, i.e., when the bottom of the weighing sleeve 35 is pressed against the top of the weighing stabilizing platform 11, it does not contact the weighing scale installed inside the weighing platform 34. When the weighing sleeve 35 descends to its lowest point, i.e., when the weighing sleeve 35 is in the weighing groove, it contacts the weighing scale installed inside the weighing platform 34. At this time, the sum of the changes in the data displayed by the two weighing scales during the powder injection process is the weight of the powder contained in the weighing sleeve 35.

[0056] The powder rotation and pushing process is as follows: After the star-shaped conveyor box 32 finishes receiving the powder, the servo motor drives the rotating feeding table 31 to rotate 45 degrees clockwise. Before this, the pneumatic drive motor 44 drives the driving plate 45 to rotate, conveying the material received inside the weighing sleeve 35 to the inside of the star-shaped conveyor box 32. Then, when rotating to the pushing position, the hydraulic pushing cylinder 42 is activated to drive the spring return push plate 46 to move towards the center position of the powder pressing and feeding table 1, pushing the received material to the center groove of the powder pressing and feeding table 1, thus completing the material pushing operation.

[0057] Based on the above, the sliding drive shaft 36 at the bottom of the star-shaped conveyor box 32 slides with the arc-shaped drive groove 41, which can squeeze the outer side of the spring reset push plate 46. That is, when the star-shaped conveyor box 32 rotates clockwise, the inner diameter of the arc-shaped drive groove 41 is reduced, which drives the sliding drive shaft 36 to squeeze the outer side of the spring reset push plate 46, and the top of the spring reset push plate 46 is attached to the top of the star-shaped conveyor box 32 to complete the operation of sealing the powder space. Then, the hydraulic push cylinder 42 drives the hydraulic push rod 43 to move the spring reset push plate 46 to the center position of the powder feeding truncated cone 1. When the hydraulic push cylinder 42 drives the hydraulic push rod 43 to reset, the stabilizing suction cup 431 drives the spring reset push plate 46 to move outward, so that the spring reset push plate 46 moves to the position squeezed with the sliding drive shaft 36 and releases the adsorption state.

[0058] Furthermore, the powder received by the four star-shaped conveyor boxes 32 can be selected according to the needs of composite ceramics. Then, the hydraulic push cylinder 42 is activated according to the order of powder layer stacking to drive the corresponding star-shaped conveyor box 32 to move, stacking the powder layer into the powder pressing groove set in the center of the powder pressing and feeding platform 1, thereby achieving the effect of free material distribution during the feeding process.

[0059] The process of rotating and smoothing the top of the powder layer is as follows: When different powder layers are put into the powder pressing groove at the center of the powder pressing feeding platform 1, the pressure auxiliary hydraulic cylinder 52 is started to drive the extrusion sleeve 51 to descend to the smoothing height. Then, the rotary motor is started to drive the rotating smoothing rod 53 to rotate clockwise, which drives the rotating smoothing rod 54 to unfold outward until it is horizontally attached to the top of the powder layer. Then, the rotation angle of the rotating smoothing rod 54 is limited by the rotating limiting sleeve 55, so that the rotating smoothing rod 54 and the rotating smoothing rod 53 are engaged. Then, by rotating the rotating smoothing rod 53, the rotating smoothing rod 54 is driven to rotate and smooth in the horizontal direction, thus completing the rotation and smoothing operation of the top of the powder layer.

[0060] Based on the above, after the top of the first layer of powder is rotated and smoothed, the powder is transported to the top of the smoothed powder layer through the next layer of storage star conveyor box 32. Then, the pressing auxiliary hydraulic cylinder 52 is started to drive the extrusion sleeve 51 to descend, so that the top of the next layer of powder is lowered to the smoothing height and waits for smoothing. This process is repeated until the top of the top layer of powder is rotated and smoothed, thus completing the rotational smoothing operation on the top of the powder layer.

[0061] Furthermore, when the bottom layer of powder and the next layer of powder are pushed to the central storage trough of the powder feeding platform 1, the rotating smoothing rod 54 is attached to the sealing rod 533 fixed at the top of the rotating smoothing rod 53. At this time, the powder will not be obstructed during the descent. Similarly, when the powder is pressed after the multiple layers of powder are smoothed, the hydraulic pressing column set in the hollow is pressed down and will not be obstructed when passing through the closed sealing rod 533 and the rotating smoothing rod 53, thus not affecting the pressing process of the powder.

[0062] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A circulating feeding device for a powder press, comprising a powder feeding disc (1) and a pressing table (2), wherein a servo motor is provided at the bottom of the powder feeding disc (1), and a hydraulic pressing column is provided at the bottom of the pressing table (2), characterized in that, The top of the powder pressing and feeding platform (1) is provided with a circulating feeding component. The circulating feeding component is powered by a servo motor and consists of a weighing mechanism (3) and a rotating pushing mechanism (4). The inside of the powder pressing and feeding platform (1) is provided with a rotating smoothing mechanism (5). The weighing mechanism (3) includes a rotating feeding platform (31) rotatably connected to the outside of the powder feeding platform (1). A star conveyor box (32) is slidably connected to the top of the rotating feeding platform (31). A feeding pipe (33) is provided on the top of the star conveyor box (32). A closed solenoid valve is provided at the bottom of the feeding pipe (33). A weighing platform (34) is provided on the inner wall of the star conveyor box (32). A weighing sleeve (35) is provided inside the star conveyor box (32). The weighing sleeve (35) is fixed with a weighing crossbar (351) that is slidably connected to the inner wall of the star-emitting conveyor box (32). The bottom of the weighing crossbar (351) is provided with a weighing plate (352) that is placed on the top of the weighing platform (34). The bottom of the weighing plate (352) is provided with two weight scales, and a lifting space is provided between the two weight scales. The rotary pushing mechanism (4) includes an arc-shaped drive groove (41) set on the top of the powder feeding truss (1). The inner wall of the arc-shaped drive groove (41) is provided with a drive switch. The outer side of the powder feeding truss (1) is provided with a hydraulic pushing cylinder (42). The hydraulic pushing cylinder (42) is provided with a hydraulic pushing rod (43) near the center of the powder feeding truss (1). The inner wall of the weighing sleeve (35) is provided with a drive motor (44), and the output shaft of the drive motor (44) is fixed with a driving plate (45). The interior of the star-shaped conveying box (32) is provided with a spring return push plate (46). The drive motor (44) is located at the axis of the weighing sleeve (35), the driving plate (45) is slidably connected to the inner wall of the weighing sleeve (35), the top of the weighing sleeve (35) is provided with a material inlet, the side wall of the weighing sleeve (35) is provided with a material outlet, and the inner wall of the weighing sleeve (35) is fixed with a material outlet partition (47) located at the top of the material outlet, which cooperates with the driving plate (45) to drive the weighed material from the material outlet into the star-shaped conveyor box (32); When the star-shaped conveyor box (32) rotates to the inside of the hydraulic push rod (43), the hydraulic push cylinder (42) is activated, which drives the spring reset push plate (46) to move towards the pressing chute. During this period, the drive motor (44) drives the driving plate (45) to rotate, and the material contained in the weighing sleeve (35) is transported to the space enclosed by the star-shaped conveyor box (32) and the powder feeding platform (1), and the powder is centrally transported by the spring reset push plate (46). The rotary smoothing mechanism (5) includes an extrusion sleeve (51) that slides on the inner wall of the powder feeding truncated cone (1). A pressing auxiliary hydraulic cylinder (52) is provided at the bottom of the extrusion sleeve (51). A rotary smoothing rod (53) is provided on the inner side of the extrusion sleeve (51). The rotary smoothing rod (53) is connected to a rotating smoothing rod (54). A rotating limiting sleeve (55) is provided at the bottom of the rotating smoothing rod (54).

2. The circulating feeding device for a powder press according to claim 1, characterized in that, A weighing stabilizing platform (11) is provided on the outside of the powder feeding truncated cone (1). A weighing groove is provided on the top of the weighing stabilizing platform (11), and the top of the weighing stabilizing platform (11) is in intermittent contact with the bottom of the weighing sleeve (35).

3. The circulating feeding device for a powder press according to claim 1, characterized in that, The inner diameter of the arc-shaped drive groove (41) decreases in the clockwise rotation direction and increases in the counterclockwise rotation direction. The bottom of the star-emitting delivery box (32) is provided with a sliding drive shaft (36) that contacts the drive switch.

4. The circulating feeding device for a powder press according to claim 1, characterized in that, The inner side of the hydraulic push rod (43) is provided with a stable suction cup (431) that is adsorbed to the outer side of the spring reset push plate (46), and the outer side of the spring reset push plate (46) is provided with a limiting extrusion groove that is pressed against the sliding drive shaft (36).

5. A circulating feeding device for a powder press according to claim 1, characterized in that, The spring reset push plate (46) is provided with a lifting compression plate (461) inside, the bottom of the lifting compression plate (461) is provided with a lifting spring (462), and the top of the lifting compression plate (461) is slidably connected to the inner top wall of the star-emitting conveyor box (32).

6. A circulating feeding device for a powder press according to claim 1, characterized in that, The outer surface of the rotating smoothing rod (53) is provided with a transmission worm gear (531), and the inner side of the rotating smoothing rod (54) is provided with a transmission worm wheel (532) that is connected to the transmission worm gear (531). The top of the rotating smoothing rod (53) is provided with a sealing rod (533), and the outer surface of the sealing rod (533) is in contact with the inner side of the rotating smoothing rod (54).

7. A circulating feeding device for a powder press according to claim 1, characterized in that, The bottom of the rotation limiting sleeve (55) is provided with a sealing rubber ring (551), and the outer surface of the sealing rubber ring (551) is provided with a sealing bracket (552).

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