A split mold integrated green compact pressing device

Abstract

The application is suitable for the technical field of powder metallurgy press forming equipment, and provides an open-closing mold integrated green compact press forming device, which comprises an open-closing mold, a green compact press forming base, an upper punch, a gear conveying module, a mold mounting module, a cutting and pressing graphite paper module and a green compact press forming module. The gear conveying module sequentially conveys three functional modules to the same working position through gear tray rotation, the mold mounting module realizes precise pre-tightening of the open-closing inner mold and the mold outer sleeve, the cutting and pressing graphite paper module completes automatic cutting, laying and waste recovery of the graphite paper, and the green compact press forming module realizes stable filling and uniform pressing of the powder in a closed space. The application integrates dispersed processes into one, realizes full-process automatic operation, improves pre-tightening precision, graphite paper processing quality and green compact pressing consistency, simultaneously simplifies the equipment structure, reduces the floor area, and is suitable for green compact press forming of special-shaped products in the powder metallurgy and hard alloy industries.

Description

Technical Field

[0001] This invention relates to the field of powder metallurgy pressing equipment technology, specifically a split-mold integrated green compact pressing device. Background Technology

[0002] In industries such as powder metallurgy, cemented carbide, and special ceramics, products with special shapes (such as stepped or conical surfaces) are often pressed and formed using split molds. These molds typically consist of an inner split mold and an outer mold, relying on the cooperation of the inner and outer conical surfaces to achieve closure and locking.

[0003] Currently, the existing technologies in this field have the following main shortcomings:

[0004] 1. Dispersed processes and low degree of automation: The traditional green body preparation process of open-mold typically includes multiple independent steps such as mold assembly and pre-tightening, graphite paper cutting and laying, powder filling and green body pressing. These steps often rely on manual labor or are completed on different equipment, resulting in low production efficiency. Moreover, manual operation makes it difficult to ensure the consistency of the process, which directly affects the quality stability of the green body.

[0005] 2. Inaccurate control of mold preload: The preload of the inner mold and outer mold is the key to ensuring molding quality. Existing methods rely heavily on the experience of operators, and the preload is not easy to quantify and control. Insufficient preload may cause powder leakage or flash during the pressing process; excessive preload may damage the mold or cause demolding difficulties.

[0006] 3. Poor efficiency and precision in graphite paper processing: Before pressing, graphite paper needs to be laid in the mold to prevent sticking. Currently, manual or simple tooling is mostly used for cutting and laying, which has problems such as large deviation in cutting size, inaccurate laying position, and easy wrinkling, affecting the demolding efficiency and surface quality of the green body.

[0007] 4. Limitations of equipment integration solutions: Although some solutions dedicated to process integration have emerged in the existing technology, such as the edge-pressing and cutting integrated mold for graphite film processing, they are mainly for edge-wrapping and cutting of sheet materials, with a single structure and function, and cannot meet the complex assembly, pre-tightening and powder pressing requirements of the petal mold; while some other petal molds or adjustable molds mainly focus on improving the mold itself, without solving the problem of automated connection and integration between multiple processes.

[0008] Therefore, in view of the above situation, there is an urgent need to provide an integrated green pressing device with a split mold to overcome the shortcomings in current practical applications. Summary of the Invention

[0009] The purpose of this invention is to provide an integrated green pressing device with a split mold, which aims to solve the problems mentioned in the background art.

[0010] This invention is implemented as follows: an integrated green compact pressing device with a split-type mold, comprising:

[0011] A petal-opening mold, a green pressing base, and an upper punch, wherein the petal-opening mold is provided with an inner petal-opening mold and a outer mold sleeve, and further includes:

[0012] Gear conveying module, mold installation module, graphite paper cutting and pressing module, and green pressing module;

[0013] The gear conveying module is provided with a first mounting hole, a second mounting hole, and a third mounting hole for fixing the mold mounting module, the graphite paper cutting and pressing module, and the green pressing module, respectively.

[0014] The mold installation module is equipped with a mold outer stamping cylinder that acts on the mold outer sleeve to complete the pre-tightening of the inner mold and the mold outer sleeve, so as to output a qualified green blank pressing mold.

[0015] The graphite paper cutting module is equipped with a graphite paper positioning punch, a graphite paper cutting punch, and graphite paper. The graphite paper cutting punch cuts the graphite paper to output graphite paper sheets of a set specification into the flap mold. The graphite paper positioning punch presses the graphite paper sheets into the flap mold to a set depth.

[0016] The green pressing module is equipped with an extended barrel and a green pressing punch for pressing the green blank. The extended barrel is in close contact with the upper surface of the slit mold to complete the receiving and storage of raw materials.

[0017] As a further embodiment of the present invention: the gear conveying module is provided with a gear tray, a drive gear and a tray support rod;

[0018] The pallet support rod supports the gear pallet via angular contact ball bearings;

[0019] The drive gear drives the gear tray to rotate and transport the mold installation module, the graphite paper cutting module, and the green pressing module above the green pressing base through inter-tooth meshing.

[0020] As a further embodiment of the present invention: the green pressing base is provided with a support column and a mold base;

[0021] The first end face of the mold base is always in contact with the lower end face of the flap inner mold;

[0022] The first axial surface and the second end surface of the mold base are in periodic contact with the inner surface of the split inner mold and the lower surface of the outer mold, respectively.

[0023] As a further embodiment of the present invention: the mold mounting module is provided with a first spring and a first bushing;

[0024] The first bushing is fixedly installed in the first mounting hole, the outer die stamping cylinder is slidably connected to the first bushing, and the two ends of the first spring are fixed to the outer die stamping cylinder and the first bushing.

[0025] As a further embodiment of the present invention: the graphite paper cutting module is provided with a second spring, a second bushing and a third spring;

[0026] The second bushing is fixedly installed in the second mounting hole, and the graphite paper cutting punch is slidably connected to the second bushing;

[0027] The two ends of the second spring are fixed to the graphite paper positioning punch and the graphite paper cutting punch, respectively, and the two ends of the third spring are fixed to the graphite paper cutting punch and the second bushing, respectively.

[0028] As a further aspect of the present invention, the graphite paper positioning punch and the graphite paper cutting punch are slidably connected.

[0029] As a further aspect of the present invention: the graphite paper cutting module further includes a graphite paper spare roll and a graphite paper recycling roll.

[0030] The graphite paper passes through the first graphite paper perforation and the second graphite paper perforation provided in the gear tray at both ends, and is wound into a graphite paper spare roll and a graphite paper recycling roll.

[0031] The graphite paper spare roll outputs new graphite paper, and the graphite paper recycling roll receives the old graphite paper that has been punched.

[0032] As a further embodiment of the present invention: the green pressing module is provided with a fourth spring, an extension cylinder, a feeding tube, a fifth spring and a third bushing;

[0033] The third bushing is fixedly installed in the third mounting hole;

[0034] The fourth spring is fixed at both ends to the green pressing punch and the extension cylinder, respectively.

[0035] The fifth spring is fixed at both ends to the extension cylinder and the third bushing, respectively.

[0036] The feed pipe is fixedly connected to the extension cylinder.

[0037] As a further aspect of the present invention, the spring constant of the second spring is greater than that of the third spring.

[0038] As a further aspect of the present invention, the spring constant of the fourth spring is greater than that of the fifth spring.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] 1. Achieved full-process automation and high-efficiency production: The gear conveyor module drives the gear tray to rotate, precisely conveying the mold installation module, graphite paper cutting and pressing module, and green body pressing module to the same workstation in sequence. This design integrates the three originally separate core processes into one, realizing fully automated continuous operation from mold preparation to green body forming, completely eliminating manual intervention and material turnover between processes, and significantly improving production efficiency.

[0041] 2. Improved precision and reliability of mold pre-tightening: The mold mounting module, driven by the upper punch, applies controllable, vertically downward pressure to the mold outer sleeve via the mold outer sleeve stamping cylinder. This forces the inner conical surface of the mold outer sleeve to slide uniformly and consistently relative to the outer conical surface of the split inner mold, thus achieving precise pre-tightening. This mechanical pre-tightening method overcomes the uncertainty of manual operation, ensures the consistency of pre-tightening force each time, and effectively avoids powder leakage or mold damage caused by improper pre-tightening force. After pre-tightening, the inner surface of the split inner mold is tightly fitted with the first axial surface of the mold base, and the lower surface of the mold outer sleeve is in contact with the second end face, forming a stable force flow transmission path, further ensuring the stability of the pressing process.

[0042] 3. Ensures the quality of graphite paper cutting and laying: The graphite paper cutting and laying module utilizes the coordinated movement of the graphite paper cutting punch and the graphite paper positioning punch, and through the stiffness difference design of the second and third springs, achieves a precise action sequence of cutting first and then laying. This ensures accurate graphite paper sheet dimensions, neat edges, and strict control over the laying position and depth. Automated feeding and waste recycling of graphite paper spare rolls and graphite paper recycling rolls enable continuous graphite paper production, further improving automation and production efficiency.

[0043] 4. Optimized consistency of green compaction process: The green compaction module forms a closed receiving space through the tight fit between the extended barrel and the upper surface of the split inner mold, effectively preventing dust and waste of powder during the compaction process and ensuring the stability of the loading amount. Similarly, utilizing the stiffness difference between the fourth and fifth springs, the extended barrel is first pressed and sealed against the mold before the green compaction punch performs the pressing action. This design ensures that the powder is uniformly compacted within the sealed space, which is beneficial for improving the density uniformity and overall strength of the green compact.

[0044] 5. Significantly improved equipment integration and space utilization: The core innovation of this invention lies in the integrated gear tray design. It integrates three functional modules onto a single rotating component, sharing a common upper punch drive system and a single working base. This highly integrated design greatly simplifies the equipment structure, significantly reduces the equipment's footprint, and simultaneously lowers manufacturing costs and complexity. Attached Figure Description

[0045] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0046] Figure 1 This is a top-angle view of the overall structure of the present invention;

[0047] Figure 2 This is a schematic diagram of the gear conveying module of the present invention;

[0048] Figure 3 This is a schematic diagram of the green pressing base of the present invention;

[0049] Figure 4 This is a schematic diagram of the mold installation module of the present invention (a: in operation; b: after operation).

[0050] Figure 5 This is a schematic diagram of the graphite paper cutting and pressing module of the present invention (a: in operation; b: after operation).

[0051] Figure 6 This is a schematic diagram of the green pressing module of the present invention (a: in operation; b: after operation).

[0052] Figure 7 This is a bottom-view perspective of the overall structure of the present invention.

[0053] In the attached diagram: 1-Opening mold, 11-Inner mold, 12-Outer mold, 2-Green pressing base, 21-Support column, 22-Mold base, 221-First axial surface, 222-First end face, 223-Second end face, 3-Upper punch, 4-Gear conveying module, 41-Gear tray, 42-Drive gear, 43-Tray support rod, 44-First mounting hole, 45-Second mounting hole, 46-Third mounting hole, 47-First graphite paper perforation, 48-Second graphite paper perforation, 5-Mold installation. Module, 51-Die outer stamping cylinder, 52-First spring, 53-First bushing, 6-Graphite paper cutting module, 61-Graphite paper positioning punch, 62-Second spring, 63-Graphite paper cutting punch, 64-Graphite paper, 65-Graphite paper spare roll, 66-Graphite paper recycling roll, 67-Second bushing, 68-Third spring, 7-Green pressing module, 71-Green pressing punch, 72-Fourth spring, 73-Extension cylinder, 74-Discharge tube, 75-Fifth spring, 76-Third bushing. Detailed Implementation

[0054] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] The present invention will be further explained below with reference to specific embodiments.

[0058] Please see Figures 1-7This invention provides an integrated green body pressing device with a split mold, comprising a split mold 1, a green body pressing base 2, and an upper punch 3, as well as a gear conveying module 4, a mold mounting module 5, a graphite paper cutting and pressing module 6, and a green body pressing module 7. The gear conveying module 4 is provided with a first mounting hole 44, a second mounting hole 45, and a third mounting hole 46, which are used to fix the mold mounting module 5, the graphite paper cutting and pressing module 6, and the green body pressing module 7, respectively. The gear conveying module 4 is also provided with a gear tray 41, a drive gear 42, and a tray support rod 43. The tray support rod 43 supports the gear tray 41 through an angular contact ball bearing, and the drive gear 42 drives the gear tray 41 to rotate and convey the mold mounting module 5, the graphite paper cutting and pressing module 6, and the green body pressing module 7 above the green body pressing base 2 through inter-tooth meshing. The mold installation module 5, through its mold outer sleeve stamping cylinder 51, acts on the mold outer sleeve 12 to pre-tighten the inner mold 11 and the mold outer sleeve 12, outputting a qualified green blank pressing mold. The graphite paper cutting module 6 is equipped with a graphite paper positioning punch 61, a graphite paper cutting punch 63, and graphite paper 64. The graphite paper cutting punch 63 cuts the graphite paper 64 and outputs graphite paper sheets of a set specification to the inner mold 1. The graphite paper positioning punch 61 presses the graphite paper sheets into the inner mold 1 to a set depth. The green blank pressing module 7, through its extended material cylinder 73, closely adheres to the upper surface of the inner mold 1 to complete the receiving and storage of raw materials, and completes the pressing of the green blank through its green blank pressing punch 71. The integrated gear tray 41 integrates the mold installation, graphite paper pressing, and green blank pressing functions together, sharing a servo hydraulic system, realizing fully automated continuous operation from mold preparation to green blank forming, completely eliminating manual intervention and material turnover between processes, and significantly improving production efficiency.

[0059] Reference Figure 3 and Figure 4The drive gear 42 drives the gear tray 41 to rotate and convey the mold mounting module 5 above the green blank pressing base 2. The mold mounting module 5 is provided with a mold outer sleeve stamping cylinder 51, a first spring 52, and a first bushing 53. The lobed mold 1 is provided with a lobed inner mold 11 and a mold outer sleeve 12. The lobed inner mold 11 is provided with an outer conical surface, and the mold outer sleeve 12 is provided with an inner conical surface. The green blank pressing base 2 is provided with a support column 21 and a mold base 22. The mold base 22 is provided with a first axial surface 221, a first end surface 222, and a second end surface 223. The first end surface 222 of the mold base 22 is always in contact with the lower end surface of the lobed inner mold 11 of the lobed mold 1. The first axial surface 221 and the second end surface 223 are in periodic contact with the inner surface of the lobed inner mold 11 and the lower surface of the mold outer sleeve 12, respectively. The first bushing 53 is fixedly installed in the first mounting hole 44. The mold outer sleeve stamping cylinder 51 is slidably connected to the first bushing 53. The two ends of the first spring 52 are fixed to the mold outer sleeve stamping cylinder 51 and the first bushing 53. The upper punch 3 contacts the upper end face of the mold outer sleeve stamping cylinder 51, causing the mold outer sleeve stamping cylinder 51 to compress the first spring 52 and slide downward along the inner surface of the first bushing 53 until the lower end face of the mold outer sleeve stamping cylinder 51 contacts the upper end face of the mold outer sleeve 12. Under the pressing force transmitted by the upper punch 3, the mold outer sleeve stamping cylinder 51 pushes the mold outer sleeve 12 downward. The inner conical surface of the mold outer sleeve 12 contacts and slides relative to the outer conical surface of the split inner mold 11, completing the pre-tightening of the mold outer sleeve 12 and the split inner mold 11, and outputting a qualified green blank pressing mold. At this time, the inner surface of the split inner mold 11 is tightly fitted with the first shaft surface 221, and the lower surface of the mold outer sleeve 12 contacts the second end face 223. The mold mounting module 5, driven by the upper punch 3, applies controllable, vertically downward pressure to the mold outer sleeve 12 via the mold outer sleeve stamping cylinder 51. This forces the inner conical surface of the mold outer sleeve 12 to slide uniformly and consistently relative to the outer conical surface of the split inner mold 11, thereby achieving precise pre-tightening. This mechanical pre-tightening method overcomes the uncertainty of manual operation, ensures the consistency of pre-tightening force each time, and effectively avoids powder leakage or mold damage caused by improper pre-tightening force.

[0060] Reference Figure 5The drive gear 42 drives the gear tray 41 to rotate and convey the graphite paper cutting module 6 above the green pressing base 2. The graphite paper cutting module 6 is equipped with a graphite paper positioning punch 61, a second spring 62, a graphite paper cutting punch 63, graphite paper 64, a second bushing 67, and a third spring 68. The second bushing 67 is fixedly installed in the second mounting hole 45. The graphite paper cutting punch 63 is slidably connected to the second bushing 67. The graphite paper positioning punch 61 is slidably connected to the graphite paper cutting punch 63. The two ends of the second spring 62 are fixed to the graphite paper positioning punch 61 and the graphite paper cutting punch 63, respectively. The two ends of the third spring 68 are fixed to the graphite paper cutting punch 63 and the second bushing 67, respectively. The spring constant of the second spring 62 is greater than that of the third spring 68. The graphite paper 64 passes through the first graphite paper perforation 47 and the second graphite paper perforation 48 respectively provided in the gear tray 41 and is wound into the graphite paper spare roll 65 and the graphite paper recycling roll 66. The graphite paper spare roll 65 outputs new graphite paper 64 above the flap mold 1, and the graphite paper recycling roll 66 receives the old graphite paper 64 after punching. The graphite paper positioning punch 61 receives the downward pressing force transmitted by the upper punch 3 and drives the graphite paper cutting punch 63 to move downward through the second spring 62 until the graphite paper cutting punch 63 contacts the upper end face of the flap inner mold 11 with the graphite paper 64 between it and the graphite paper 64. The graphite paper cutting punch 63 cuts the graphite paper 64 and outputs a graphite paper sheet of a set specification in the flap inner mold 11. The graphite paper positioning punch 61 continues to move downward and presses the graphite paper sheet into the flap inner mold 11 at a set depth. The graphite paper cutting and pressing module 6 utilizes the coordinated movement of the graphite paper cutting punch 63 and the graphite paper positioning punch 61, and through the stiffness difference design of the second spring 62 and the third spring 68, achieves a precise action sequence of cutting followed by pressing. This ensures accurate graphite paper sheet dimensions, neat edges, and strict control over the placement position and depth. Automated feeding and waste recycling of the graphite paper spare roll 65 and graphite paper recycling roll 66 enable continuous operation of the graphite paper 64, further improving automation and production efficiency.

[0061] The drive gear 42 drives the gear tray 41 to rotate and convey the green pressing module 7 above the green pressing base 2. The green pressing module 7 is equipped with a green pressing punch 71, a fourth spring 72, an extension cylinder 73, a fifth spring 75, and a third bushing 76. The third bushing 76 is fixedly installed in the third mounting hole 46. The two ends of the fourth spring 72 are fixed to the green pressing punch 71 and the extension cylinder 73, respectively. The two ends of the fifth spring 75 are fixed to the extension cylinder 73 and the third bushing 76, respectively. The stiffness coefficient of the fourth spring 72 is greater than that of the fifth spring 75. The extension cylinder 73 is also fixedly equipped with a feed pipe 74 for receiving powder. The green pressing punch 71 receives the downward pressing force transmitted by the upper punch 3, which drives the extension cylinder 73 to move downward through the fourth spring 72 until the extension cylinder 73 is in close contact with the upper end face of the split inner mold 11. The powder material is conveyed through the feeding pipe 74 to the extended barrel 73 and the split inner mold 11. The green pressing punch 71 continues to move downwards, outputting a set pressing force to the powder material to press it into a green blank. The green pressing module 7 forms a closed receiving space through the tight fit between the extended barrel 73 and the upper surface of the split inner mold 11, effectively preventing dust and waste of powder material during the pressing process and ensuring the stability of the loading amount. Similarly, by utilizing the stiffness difference between the fourth spring 72 and the fifth spring 75, the extended barrel 73 is first pressed and sealed with the mold, and then the green pressing punch 71 performs the pressing action. This design ensures that the powder material is uniformly compacted in the closed space, which is beneficial to improving the density uniformity and overall strength of the green blank.

[0062] In summary, the working principle of this invention is as follows:

[0063] The support column 21 of the green pressing base 2 provides a stable base for the green pressing process, and the mold base 22 is used to place the split mold 1. At this time, the inner mold 11 and the outer mold 12 of the split mold 1 are in an unlocked state. The lower end face of the inner mold 11 of the split mold 1 is in contact with the first end face 222 of the mold base 22, and the lower surface of the outer mold 12 of the split mold 1 is not in contact with the second end face 223 of the mold base 22. The drive gear 42 drives the gear tray 41 to rotate and transport the mold mounting module 5 above the green pressing base 2. The die outer sleeve stamping cylinder 51 is slidably connected to the first bushing 53. The first bushing 53 is fixedly installed in the first mounting hole 44. The upper punch 3 contacts the upper end face of the die outer sleeve stamping cylinder 51, causing the die outer sleeve stamping cylinder 51 to compress the first spring 52 and slide downward along the inner surface of the first bushing 53 until the lower end face of the die outer sleeve stamping cylinder 51 contacts the upper end face of the die outer sleeve 12. Under the pressing force transmitted by the upper punch 3, the die outer sleeve stamping cylinder 51 pushes the die outer sleeve 12 downward. Since the open-end inner mold 11, which is in contact with the first end face 222 of the die base 22, cannot move downward, the inner conical surface of the die outer sleeve 12 and the outer conical surface of the open-end inner mold 11 slide relative to each other, completing the pre-tightening of the die outer sleeve 12 and the open-end inner mold 11, and outputting a qualified green blank pressing die. At this time, the inner surface of the open-end inner mold 11 is tightly fitted with the first shaft surface 221 of the die base 22, and the lower surface of the die outer sleeve 12 contacts the second end face 223. After the mold is installed, the upper punch 3 returns to its original position, and the outer stamping cylinder 51 of the mold returns to its original position under the elastic force of the first spring 52. The drive gear 42 drives the gear tray 41 to rotate and transport the graphite paper cutting and pressing module 6 above the green pressing base 2. The graphite paper recycling roll 66 drives the old graphite paper 64, which has been punched, through the second graphite paper perforation 48 and is wound into the graphite paper recycling roll 66. At the same time, the graphite paper spare roll 65 outputs new graphite paper 64 through the first graphite paper perforation 47 above the opening mold 1. The second bushing 67 is fixedly installed in the second mounting hole 45, and the graphite paper cutting punch 63 is slidably connected to the second bushing 67. The graphite paper positioning punch 61 is slidably connected to the graphite paper cutting punch 63. Because the spring constant of the second spring 62 is greater than that of the third spring 68, the graphite paper positioning punch 61 receives the downward pressing force transmitted by the upper punch 3. First, the second spring 62 drives the graphite paper cutting punch 63 downward (compressing the third spring 68) until the graphite paper cutting punch 63 contacts the upper surface of the split inner mold 11, separated by the graphite paper 64. The upper punch 3 continues to push the graphite paper positioning punch 61 downward, and the graphite paper cutting punch 63 cuts the graphite paper 64 to output a graphite paper sheet of the set specifications. The graphite paper positioning punch 61 continues to move downward (at this time, the second spring 62 is compressed) to press the graphite paper sheet into the split inner mold 11 at the set depth. After the graphite paper sheet is pressed, the upper punch 3 returns to its original position, and the graphite paper cutting punch 63 and the graphite paper positioning punch 61 return to their original positions under the action of the third spring 68 and the second spring 62, respectively.Drive gear 42 drives gear tray 41 to rotate and convey green compact pressing module 7 above green compact pressing base 2. Third bushing 76 is fixedly installed in third mounting hole 46, extension cylinder 73 is slidably connected to third bushing 76, and green compact pressing punch 71 is slidably connected to extension cylinder 73. Since the stiffness coefficient of fourth spring 72 is greater than that of fifth spring 75, green compact pressing punch 71 receives the downward pressing force transmitted by upper punch 3 and first drives extension cylinder 73 downward through fourth spring 72 (fifth spring 75 is compressed) until extension cylinder 73 is in close contact with the upper end face of open inner mold 11. Powder slides into feed pipe 74 and is conveyed through feed pipe 74 to extension cylinder 73 and open inner mold 11. At this time, powder is in a loose state. Green compact pressing punch 71 continues to move downward and outputs the set pressing force to powder to press powder into dense green compact. After the green body is pressed, the upper punch 3 returns to its original position, and the extended barrel 73 and the green body pressing punch 71 return to their original positions under the action of the fifth spring 75 and the fourth spring 72, respectively. The drive gear 42 drives the gear tray 41 to rotate again and convey the graphite paper cutting module 6 above the green body pressing base 2. The graphite paper cutting module 6 cuts the graphite paper 64 for the second time and outputs graphite paper sheets above the green body. At this time, there is one graphite paper sheet on each of the upper and lower sides of the green body.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A split-type mold integrated green blank pressing device, comprising a split mold (1), a green blank pressing base (2), and an upper punch (3), wherein the split mold (1) is provided with a split inner mold (11) and a mold outer sleeve (12), characterized in that, Also includes: Gear conveying module (4), mold installation module (5), graphite paper cutting and pressing module (6) and green pressing module (7); The gear conveying module (4) is provided with a first mounting hole (44), a second mounting hole (45) and a third mounting hole (46) for fixing the mold mounting module (5), the graphite paper cutting module (6) and the green pressing module (7), respectively. The mold installation module (5) is equipped with a mold outer sleeve stamping cylinder (51) that acts on the mold outer sleeve (12) to complete the pre-tightening of the inner mold (11) and the mold outer sleeve (12) so as to output a qualified green blank pressing mold; The graphite paper cutting module (6) is equipped with a graphite paper positioning punch (61), a graphite paper cutting punch (63), and graphite paper (64). The graphite paper cutting punch (63) cuts the graphite paper (64) to output a graphite paper sheet of a set specification to the flap mold (1). The graphite paper positioning punch (61) presses the graphite paper sheet into the flap mold (1) to a set depth. The green pressing module (7) is provided with an extended barrel (73) and a green pressing punch (71) for pressing the green blank. The extended barrel (73) is closely fitted with the upper surface of the slit mold (1) to complete the acceptance and storage of raw materials.

2. The integrated green compact pressing device with a split mold according to claim 1, characterized in that, The gear conveying module (4) is provided with a gear tray (41), a drive gear (42) and a tray support rod (43). The pallet support rod (43) supports the gear pallet (41) via an angular contact ball bearing. The drive gear (42) drives the gear tray (41) to rotate and transport the mold installation module (5), the graphite paper cutting module (6) and the green pressing module (7) above the green pressing base (2) through inter-tooth meshing.

3. The integrated green compact pressing device with a split mold according to claim 1, characterized in that, The green pressing base (2) is provided with a support column (21) and a mold base (22). The first end face (222) of the mold base (22) is always in contact with the lower end face of the flap inner mold (11); The first axial surface (221) and the second end surface (223) of the mold base (22) periodically contact the inner surface of the split inner mold (11) and the lower surface of the mold outer sleeve (12), respectively.

4. The integrated green pressing device with a split mold according to claim 1, characterized in that, The mold mounting module (5) is provided with a first spring (52) and a first bushing (53); The first bushing (53) is fixedly installed in the first mounting hole (44), the mold outer stamping cylinder (51) is slidably connected to the first bushing (53), and the two ends of the first spring (52) are fixed to the mold outer stamping cylinder (51) and the first bushing (53).

5. The integrated green compact pressing device with a split mold according to claim 1, characterized in that, The graphite paper cutting module (6) is provided with a second spring (62), a second bushing (67) and a third spring (68). The second bushing (67) is fixedly installed in the second mounting hole (45), and the graphite paper cutting punch (63) is slidably connected to the second bushing (67); The two ends of the second spring (62) are fixed to the graphite paper positioning punch (61) and the graphite paper cutting punch (63) respectively, and the two ends of the third spring (68) are fixed to the graphite paper cutting punch (63) and the second bushing (67) respectively.

6. The open-mold integrated green pressing device according to claim 1 or 5, characterized in that, The graphite paper positioning punch (61) and the graphite paper cutting punch (63) are slidably connected.

7. The integrated green compact pressing device with a split mold according to claim 2, characterized in that, The graphite paper cutting module (6) also includes a graphite paper spare roll (65) and a graphite paper recycling roll (66). The graphite paper (64) passes through the first graphite paper perforation (47) and the second graphite paper perforation (48) provided on the gear tray (41) at both ends, and is wound into a graphite paper spare roll (65) and a graphite paper recycling roll (66). The graphite paper spare roll (65) outputs new graphite paper (64), and the graphite paper recycling roll (66) receives the old graphite paper (64) after it has been punched.

8. The integrated green compact pressing device with a split mold according to claim 1, characterized in that, The green pressing module (7) is equipped with a fourth spring (72), an extension cylinder (73), a feeding tube (74), a fifth spring (75), and a third bushing (76). The third bushing (76) is fixedly installed in the third mounting hole (46); The fourth spring (72) is fixed at both ends to the green pressing punch (71) and the extension cylinder (73), respectively. The fifth spring (75) is fixed at both ends to the extension cylinder (73) and the third bushing (76), respectively. The feed pipe (74) is fixedly connected to the extension cylinder (73).

9. The integrated green compact pressing device with a split mold according to claim 5, characterized in that, The spring constant of the second spring (62) is greater than that of the third spring (68).

10. The open-mold integrated green pressing device according to claim 8, characterized in that, The spring constant of the fourth spring (72) is greater than that of the fifth spring (75).

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