Powder forming machine with improved feeding structure

Abstract

The utility model relates to the technical field of powder forming equipment, and discloses a powder forming machine with an improved feeding structure. The upper die assembly comprises a first longitudinal moving device, an upper die head and an upper die plate. The lower die assembly comprises a second longitudinal moving device and a lower die base. The core rod device comprises a mounting seat, a core rod assembly and a third longitudinal moving device; the powder feeding device comprises a shell, a first motor, a speed reducer, a swing rod, a support, a box body and an air cylinder. An output shaft of the speed reducer extends out of the shell, the end of the swing rod is arranged on the output shaft of the speed reducer in a sleeving mode, and the end of the swing rod can be movably adjusted relative to the output shaft of the speed reducer. An open type notch is formed in the connecting position of the support and the swing rod, and the telescopic end of the air cylinder is hung on the support. The utility model has the advantages of flexible adjustment capability, higher operation precision and more stable movement.

Description

Technical Field

[0001] This utility model relates to the field of powder forming equipment technology, and in particular to a powder forming machine with an improved feeding structure. Background Technology

[0002] The purpose of a powder forming machine is to transform loose powder into semi-finished or finished products with predetermined geometry, size, density, and strength. Among these, the most common powder forming method is powder extrusion molding. Powder extrusion molding generally refers to a powder forming method that uses the pressure of a punch to extrude metal powder in a die through an extrusion die with the same cross-sectional dimensions and shape as the product, thus forming a dense rod or part.

[0003] The existing powder molding machine operates as follows: the powder feeding mechanism evenly fills a fixed amount of powder into the cavity on the lower mold base; high pressure is applied through the upper mold head to tightly bind the powder particles and eliminate voids. The molded blank is then ejected from the mold, maintaining its shape.

[0004] Given that the powder feeding mechanism on the market is fixedly connected to the equipment, a series of cumbersome disassembly steps are required when disassembling or replacing the powder feeding mechanism, making the operation inconvenient.

[0005] Therefore, improvements are needed. Utility Model Content

[0006] The technical problem solved by this utility model is to address the deficiencies in the prior art by providing a powder forming machine with an improved feeding structure to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a powder forming machine with an improved feeding structure, comprising: a frame, the frame being used to install and support mechanical components, the frame including a lower frame and an upper frame disposed on the upper part of the lower frame, the upper frame being an integral structure of ductile iron forming; an upper mold assembly, the upper mold assembly being disposed on the upper part of the upper frame, the upper mold assembly including a first longitudinal moving device, an upper mold head disposed at the moving end of the first longitudinal moving device and an upper template sleeved on the upper mold head; a lower mold assembly, the lower mold assembly including a second longitudinal moving device and a lower mold base disposed on the moving end of the second longitudinal moving device, the second longitudinal moving device being disposed on the lower frame and the lower mold base having a cavity for filling powder; a first guide assembly, the first guide assembly being longitudinally disposed on the upper frame, the first guide assembly passing through the upper template and the lower mold base; a mandrel device, the mandrel being... The rod assembly includes a mounting base mounted on the upper frame, a mandrel assembly disposed on the mounting base, and a third longitudinal moving device connected to the mandrel assembly; the mounting base is located below the lower mold base, and at least a portion of the mandrel assembly is placed in the cavity; a powder feeding device is disposed on one side of the lower mold base, the powder feeding device includes a housing, a powder feeding motor disposed within the housing, a reducer connected to the output shaft of the powder feeding motor, a swing arm connected to the reducer, a bracket hanging on the swing arm, a housing disposed on the bracket, and a cylinder disposed outside the housing; the output shaft of the reducer extends outside the housing, the end of the swing arm is sleeved on the output shaft of the reducer, and the end of the swing arm is movable and adjustable relative to the output shaft of the reducer; an open slot is provided at the connection position between the bracket and the swing arm, and the telescopic end of the cylinder is hung on the bracket; a control system is used to receive and output signals.

[0008] Furthermore, the first longitudinal moving device includes a first hydraulic cylinder, a first inner shell sleeved outside the first hydraulic cylinder, a first guide rail disposed on the outer wall of the first inner shell, a first slider disposed on the upper part of the upper frame, and a first outer shell disposed outside the first inner shell; wherein, the first outer shell is connected to the first hydraulic cylinder and the upper frame; the first slider cooperates with the first guide rail; when the first hydraulic cylinder drives the upper die head to move downward, the first inner shell is guided by the cooperation of the first guide rail and the first slider.

[0009] Furthermore, the first guide component includes four arrayed positioning guide posts, and the upper template and the lower mold base are connected to the positioning guide posts through guide sleeves.

[0010] Furthermore, the second longitudinal moving device includes a second motor, a second lead screw connected to the output end of the second motor, a second inner shell sleeved on the threaded section of the second lead screw, a second guide rail disposed on the outer circumferential surface of the second inner shell, a second slider mounted on the lower part of the upper frame, and a second outer shell covering the outside of the second inner shell; wherein, the second outer shell is connected to the lower part of the upper frame and the optical axis position of the second lead screw; at least a portion of the second inner shell extends to connect with the lower mold base; the second slider cooperates with the second guide rail, and when the second motor drives the lower mold base to move, the second inner shell is guided by the second guide rail and the second slider.

[0011] Furthermore, the third longitudinal moving device includes a third motor, a third lead screw mounted on the third motor, a third optical axis parallel to the third lead screw, and a third sleeve sleeved on the third lead screw and the third optical axis; the third motor drives the third sleeve to move longitudinally.

[0012] Furthermore, the mandrel assembly includes a spring fixed to the upper end of the third sleeve, an inner mandrel disposed on the third sleeve and abutting against the spring, and an outer mandrel disposed on the mounting base; wherein the outer mandrel has a hollow structure and the inner mandrel is placed inside the outer mandrel.

[0013] Furthermore, it includes a second guide assembly, which includes a third guide rail and a third slider that cooperates with the third guide rail. The third guide rail is longitudinally mounted on the upper frame, and the third slider is connected to the upper template.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] Quick assembly and disassembly: The open slot design of the bracket and the cylinder hook design enable quick disassembly and replacement of the powder feeding device, solving the problem of cumbersome operation of the traditional fixed connection method and significantly improving maintenance efficiency; the adjustable connection between the swing arm and the reducer output shaft allows for flexible adjustment to adapt to assembly errors caused in the production of mechanical parts, meeting production needs.

[0016] Three sets of longitudinal drive systems: upper die (hydraulic drive), lower die (servo screw), and mandrel (motor + spring buffer) are independently controlled; capable of producing the required hollow CNC cutting tools. At the same time, the guide rails and sliders set on the upper and lower die assemblies can improve the accuracy of longitudinal movement and the stability of the movement process.

[0017] Mandrel spring buffer design: The inner mandrel is elastically connected to the third sleeve through a spring, which avoids hard contact with the upper die head during the pressing process and improves equipment safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of this utility model from another angle.

[0020] Figure 3 This is a partial structural schematic diagram of the present invention.

[0021] Figure 4 This is a partial cross-sectional structural schematic diagram of the present invention.

[0022] Figure 5 This is a schematic diagram of the internal structure of this utility model.

[0023] Figure 6 This is a schematic diagram of the internal structure of this utility model.

[0024] Figure 7 This is a schematic diagram of the powder feeding device.

[0025] Figure 8 This is a partial schematic diagram of the connection between the rocker arm and the reducer shaft.

[0026] Figure 9 This is a schematic diagram of the internal structure of the powder feeding device.

[0027] Figure 10 This is a partial structural diagram of the powder feeding device.

[0028] Figure 11 This is a partial cross-sectional structural schematic diagram of the present invention.

[0029] Figure 12 This is a structural schematic diagram of the upper mold assembly.

[0030] Figure 13 This is a structural schematic diagram of the upper mold assembly.

[0031] Figure 14 This is a cross-sectional structural diagram of the upper mold assembly.

[0032] Figure 15 This is a structural schematic diagram of the lower mold assembly.

[0033] Figure 16 This is a cross-sectional structural diagram of the lower mold assembly.

[0034] Figure 17 This is a structural schematic diagram of the lower mold assembly.

[0035] Figure 18 yes Figure 17 A magnified view of a portion of the image.

[0036] Figure 19This is a schematic diagram of the mandrel device and the third longitudinal moving device.

[0037] Figure 20 yes Figure 19 A cross-sectional structural diagram.

[0038] Figure 21 This is a cross-sectional structural diagram of the mandrel device.

[0039] Figure 22 yes Figure 21 A magnified view of a portion of the image.

[0040] Figure 23 yes Figure 21 A magnified view of a portion of the image.

[0041] Reference numerals: 1. Frame; 2. Lower frame; 3. Upper frame; 4. Upper mold assembly; 5. First longitudinal moving device; 6. Upper mold head; 7. Upper template; 8. Lower mold assembly; 9. Second longitudinal moving device; 10. Lower mold base; 11. Cavity; 12. First guide assembly; 13. Mandrel assembly; 14. Mounting base; 15. Mandrel assembly; 16. Third longitudinal moving device; 17. Powder feeding device; 18. Housing; 19. Powder feeding motor; 20. Reducer; 21. Swing rod; 22. Bracket; 23. Box body; 24. Cylinder; 2 5. Open slot; 26. Control system; 27. First hydraulic cylinder; 28. First inner shell; 29. ​​First guide rail; 30. First slider; 31. First outer shell; 32. Second motor; 33. Second lead screw; 34. Second inner shell; 35. Second guide rail; 36. Second slider; 37. Second outer shell; 38. Third motor; 39. Third lead screw; 40. Third optical axis; 41. Third sleeve; 42. Spring; 43. Inner core rod; 44. Outer core rod; 45. Second guide assembly; 46. Third guide rail; 47. Third slider. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings.

[0043] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and 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, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In view of the technical problems described in the background art, such as Figure 1-23As shown, a powder forming machine with an improved feeding structure is provided, comprising: a frame 1 for mounting and supporting mechanical components, the frame 1 including a lower frame 2 and an upper frame 3 disposed on the upper part of the lower frame 2, the upper frame 3 being an integral structure of ductile iron forming; an upper mold assembly 4 disposed on the upper part of the upper frame 3, the upper mold assembly 4 including a first longitudinal moving device 5, an upper mold head 6 disposed at the moving end of the first longitudinal moving device 5, and an upper template 7 sleeved on the upper mold head 6; and a lower mold assembly 8. 8 includes a second longitudinal moving device 9 and a lower mold base 10 disposed on the moving end of the second longitudinal moving device 9. The second longitudinal moving device 9 is disposed on the lower frame 2 and the lower mold base 10 is provided with a cavity 11 for filling powder; a first guide assembly 12 is longitudinally disposed on the upper frame 3 and the first guide assembly 12 passes through the upper mold plate 7 and the lower mold base 10; a mandrel device 13 includes a mounting base 14 mounted on the upper frame 3 and a cavity 11 disposed on the lower mold base 2. The mounting base 14 includes a mandrel assembly 15 and a third longitudinal moving device 16 connected to the mandrel assembly 15; the mounting base 14 is located below the lower mold base 10, and at least a portion of the mandrel assembly 15 is placed in the cavity 11; a powder feeding device 17 is located on one side of the lower mold base 10, and the powder feeding device 17 includes a housing 18, a powder feeding motor 19 disposed within the housing 18, a reducer 20 connected to the output shaft of the powder feeding motor, a swing arm 21 connected to the reducer 20, and a bracket suspended on the swing arm 21. 22, a housing 23 mounted on the bracket 22 and a cylinder 24 mounted outside the housing 18; the output shaft of the reducer 20 extends outside the housing 18, the end of the rocker arm 21 is sleeved on the output shaft of the reducer 20, and the end of the rocker arm 21 can be adjusted relative to the output shaft of the reducer 20; an open slot 25 is provided at the connection position between the bracket 22 and the rocker arm 21, and the telescopic end of the cylinder 24 is hung on the bracket 22; a control system 26 is used to receive and output signals.

[0045] In the above technical solution, the frame 1 includes a lower frame 2 and an upper frame 3. Since the upper frame 3 is the main load-bearing frame, the upper frame 3 is made of high-strength ductile iron integral casting to ensure overall rigidity.

[0046] The upper mold assembly 4 is used to apply pressure. The upper mold assembly 4 includes a first longitudinal moving device 5, an upper mold head 6, and an upper template 7. The first longitudinal moving device 5 is installed on the upper end face of the upper frame 3 and penetrates the interior of the upper frame 3.

[0047] The lower mold assembly 8 is used to hold the powder and complete the ejection action. The lower mold assembly 8 mainly includes a second longitudinal moving device 9 and a lower mold base 10. A cavity 11 is provided on the lower mold base 10. The cavity 11 is designed according to the shape of the part to be produced. For example, if CNC cutting tools are produced, the cavity 11 is designed accordingly. There are no restrictions on this.

[0048] The first guide component 12 is used to ensure centering during the pressing process. The first guide component 12 is longitudinally connected to the upper and lower surfaces of the upper frame 3. The first guide component 12 passes through the upper template 7 and the lower mold base 10 respectively, and plays a guiding role for the upper template 7 and the lower mold base 10 during movement.

[0049] The mandrel device 13 is used to form a hollow structure blank. In use, at least a part of the mandrel device 13 is placed inside the cavity 11 to form a hollow structure during the pressing process.

[0050] The powder feeding device 17 is used to quantitatively feed powder into the cavity 11. To facilitate easy disassembly, the powder feeding device 17 includes: a housing 18, a powder feeding motor 19, a reducer 20, a swing arm 21, a bracket 22, a box 23, and a cylinder 24.

[0051] The housing 18 is equipped with drive switches, such as the switch for the powder feeding motor 19 and the switch for the cylinder 24. The powder feeding motor 19 is located inside the housing 18, and its output end is connected to the reducer 20. The other output end of the reducer 20 extends outside the housing 18 and is connected to the rocker arm 21. The reducer 20 and the rocker arm 21 are connected and adjusted via a keyway. During assembly, the end of the rocker arm 21 is fitted onto the output end of the reducer 20. After adjusting to the appropriate position, the rocker arm 21 and the reducer 20 are fixed together by a key, and the rocker arm 21 is locked and fixed to the output end of the reducer 20 by screws. This adjustment method can solve the errors formed in the processing and assembly of the components, and facilitate the accurate delivery of the powder box to the cavity 11. Meanwhile, the bracket 22 is designed with an open slot 25, which is a U-shaped slot facing downwards. The bracket 22 is directly attached to the swing rod 21, and the telescopic end of the cylinder 24 is attached to the bracket 22. At the same time, when the powder box is being fed, the cylinder 24 continuously presses down, and the powder box can effectively fit against the end face of the lower mold base 10.

[0052] The control system 26 can be a PLC, a microcontroller, or a host computer, which has control programming capabilities, and controls the processing through programming.

[0053] The specific disassembly process is as follows: the worker turns off the powder feeding motor 19 on the housing 18 and shuts off the air source of the cylinder 24; the open slot 25 of the bracket 22 is removed from the position of the swing rod 21, and the hook of the output end of the cylinder 24 is removed from the bracket 22, thereby realizing the disassembly of the entire bracket 22 with the powder box, which is convenient for replacement operation.

[0054] Specifically, in this embodiment, when the powder forming machine is working, the second longitudinal moving device 9 drives the lower mold base 10 to move upward, so that the cavity 11 of the lower mold base 10 can have a certain height difference relative to the mandrel device 13. The powder feeding motor 19 of the powder feeding device 17 drives the transmission to the swing arm 21 through the reducer 20. The swing arm 21 drives the bracket 22 to move downward to the cavity 11 of the lower mold base 10, and the powder box releases the powder into the cavity 11. At the same time, the downward force of the cylinder 24 allows the powder box to fit against the end face of the cavity 11. Then, under the action of the first longitudinal moving module, the upper mold assembly 4 squeezes the powder piled in the forming cavity 11 to form the powder. At the same time, the third longitudinal moving module moves in cooperation with the first longitudinal moving module, so that the end face of the mandrel assembly 15 does not make hard contact with the upper mold head 6, and the hollow workpiece product is pressed and formed. The first longitudinal moving module and the second longitudinal moving module drive the upper mold head 6 to move upward and the lower mold base 10 to move downward, so that the formed product is unloaded and the processing operation is completed.

[0055] Referring to the figure, the first longitudinal moving device 5 includes a first hydraulic cylinder 27, a first inner shell 28 sleeved outside the first hydraulic cylinder 27, a first guide rail 29 disposed on the outer wall of the first inner shell 28, a first slider 30 disposed on the upper part of the upper frame 3, and a first outer shell 31 disposed outside the first inner shell 28; wherein, the first outer shell 31 is connected to the first hydraulic cylinder 27 and the upper frame 3; the first slider 30 cooperates with the first guide rail 29; when the first hydraulic cylinder 27 drives the upper die head 6 to move downward, the first inner shell 28 is guided by the cooperation of the first guide rail 29 and the first slider 30.

[0056] In actual use, the accuracy of the movement of the upper mold head 6 affects the product molding quality. Traditional guide structures use optical axis guidance, which cannot achieve higher accuracy in the movement of the upper mold head 6.

[0057] In this embodiment, the structure of the first longitudinal moving device 5 of the upper mold assembly 4 is optimized. Specifically, the first longitudinal moving device 5 includes a first hydraulic cylinder 27, a first inner shell 28, a first guide rail 29, a first slider 30, and a first outer shell 31. The first hydraulic cylinder 27 is disposed on the upper end face of the upper frame 3, and the output end of the first hydraulic cylinder 27 extends downward through the upper frame 3. The upper mold plate 7 and the upper mold head 6 are both disposed on the telescopic end of the first hydraulic cylinder 27. The first inner shell 28 is sleeved and installed on the first hydraulic cylinder 27. The first guide rail 29 is disposed on the outer peripheral surface of the first inner shell 28. The first slider 30 is disposed at the position of the first inner shell 28 of the upper frame 3. The first slider 30 cooperates with the first guide rail 29. Preferably, the number of first sliders 30 and first guide rails 29 can be selected according to the actual use. Specifically, in this embodiment, the first guide rail 29 is disposed on all four peripheral surfaces of the first inner shell 28, and the upper frame 3 is disposed at the corresponding positions of the first guide rails 29. The first outer shell 31 covers the first inner shell 28. At the same time, the first outer shell 31 is connected to the first hydraulic cylinder 27 and the upper frame 3, which can prevent foreign objects from entering.

[0058] When the first hydraulic cylinder 27 drives its telescopic end to move, the first guide rail 29 outside the first inner shell 28 moves along the first slider 30, thereby improving the accuracy of the movement, and the upper die head 6 can accurately press the powder with the cavity 11 of the lower die base 10.

[0059] like Figure 11-14 As shown, the first guide component 12 includes four arrayed positioning guide posts, and the upper template 7 and the lower mold base 10 are connected to the positioning guide posts through guide sleeves.

[0060] The four positioning guide pillars are arranged in a rectangular shape. The upper mold plate 7 and the lower mold base 10 are slidably engaged by the guide sleeve to ensure the alignment accuracy of the upper mold assembly and the lower mold assembly 8, and to avoid deformation of mechanical parts caused by off-center loading, which would result in unqualified or defective pressed products.

[0061] like Figure 14-18 As shown, the second longitudinal moving device 9 includes a second motor 32, a second lead screw 33 connected to the output end of the second motor 32, a second inner shell 34 sleeved on the threaded section of the second lead screw 33, a second guide rail 35 disposed on the outer circumferential surface of the second inner shell 34, a second slider 36 mounted on the lower part of the upper frame 3, and a second outer shell 37 covering the outside of the second inner shell 34; wherein, the second outer shell 37 is connected to the lower part of the upper frame 3 and the optical axis position of the second lead screw 33; at least a portion of the second inner shell 34 extends to connect with the lower mold base 10; the second slider 36 cooperates with the second guide rail 35, and when the second motor 32 drives the lower mold base 10 to move, the second inner shell 34 is guided by the second guide rail 35 and the second slider 36.

[0062] In practical use, the accuracy of the lower mold assembly 8 affects the product molding quality. Traditional guide structures use optical axis guidance, and the accuracy of the movement of the lower mold assembly 8 cannot reach a higher level.

[0063] Specifically, the second longitudinal moving device 9 includes a second motor 32, a second lead screw 33, a second inner shell 34, a second guide rail 35, a second slide rail, and a second outer shell 37. The output end of the second motor 32 can be connected to the second lead screw 33 via a coupling. The second lead screw 33 includes a linear axis position and a threaded section position. The second outer shell 37 is fitted at the linear axis position and connected to the bottom of the upper frame 3. The second inner shell 34 is fitted on the second lead screw 33 and is placed inside the second outer shell 37. The upper part of the second inner shell 34 is connected to the lower mold base 10. A second guide rail 35 and a second slider 36 are provided between the second inner shell 34 and the second outer shell 37. The number of second guide rails 35 and second sliders 36 can be selected according to the actual use. Specifically, in this embodiment, the second guide rails 35 are provided on two opposite sides of the second inner shell 34, and the lower part of the upper frame 3 is provided with corresponding second sliders 36 at the positions of the second guide rails 35. The second outer shell 37 covers the second inner shell 34. At the same time, the upper frame 3 of the second outer shell 37 is connected to the optical axis of the second lead screw 33, which can prevent foreign objects from entering.

[0064] When the second motor 32 drives the second lead screw 33 to move, the second guide rail 35 outside the second inner shell 34 moves along the second slider 36, thereby improving the accuracy of the movement and improving the accuracy of the movement of the lower mold base 10.

[0065] like Figure 19-21 As shown, the third longitudinal moving device 16 includes a third motor 38, a third lead screw 39 disposed on the third motor 38, a third optical axis 40 disposed parallel to the third lead screw 39, and a third sleeve 41 sleeved on the third lead screw 39 and the third optical axis 40; the third motor 38 drives the third sleeve 41 to move longitudinally.

[0066] In implementation, to avoid hard contact between the mandrel assembly 15 and the upper die head 6, the mandrel device 13 includes a third longitudinal moving device 16. Specifically, the third longitudinal moving device 16 includes a third motor 38, a third lead screw 39, a third optical shaft 40, and a third sleeve 41; the upper end of the third sleeve 41 is used to install the mandrel assembly 15. The driving process is as follows: when the upper die head 6 presses down and contacts the mandrel inside the cavity 11, to avoid continued hard contact, as the upper die head 6 continues to move downwards, the mandrel assembly 15 moves downwards synchronously. Specifically, the third motor 38 drives the third lead screw 39 to rotate, and the third sleeve 41 moves longitudinally under the limitation of the third optical shaft 40 and the third lead screw 39.

[0067] like Figure 21-23 As shown, the mandrel assembly 15 includes a spring 42 fixed to the upper end of the third sleeve 41, an inner mandrel 43 disposed on the third sleeve 41 and abutting against the spring 42, and an outer mandrel 44 disposed on the mounting base 14; wherein, the outer mandrel 44 is a hollow structure, and the inner mandrel 43 is placed inside the outer mandrel 44.

[0068] Preferably, the mandrel assembly 13 features an elastic buffer design: the mandrel assembly 15 includes a spring 42, an inner mandrel 43, and an outer mandrel 44. An installation space is provided at the front end of the third sleeve 41, where the spring 42 is placed. The inner mandrel 43 extends to the cavity 11 of the lower mold base 10. Simultaneously, the outer mandrel 44 is mounted on the mounting base 14 and sleeved on the inner mandrel 43. The outer mandrel 44 is fixed, and the height difference between the outer mandrel 44 and the lower mold base 10 forms the cavity 11. During use, when the upper mold head 6 moves excessively downward, the spring 42 compresses, and the inner mandrel 43 provides elastic buffering, preventing hard contact with the upper mold head 6 and protecting the mold.

[0069] refer to Figure 5-6 As shown, the present invention includes a second guide component 45, which includes a third guide rail 46 and a third slider 47 that cooperates with the third guide rail 46. The third guide rail 46 is longitudinally mounted on the upper frame 3, and the third slider 47 is connected to the upper template 7.

[0070] Furthermore, in order to improve the moving accuracy of the upper template 7, a second guide component 45 is provided on the upper mold frame. The second guide component 45 includes a third guide rail 46 and a third slider 47. When the upper template 7 is driven to move, the third slider 47 moves along the direction set by the third guide rail 46, thereby improving the moving accuracy of the upper template 7.

[0071] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A powder forming machine with an improved feeding structure, characterized in that, include: A frame for mounting and supporting mechanical components, the frame including a lower frame and an upper frame disposed on the upper part of the lower frame, the upper frame being an integral structure formed of ductile iron; The upper mold assembly is disposed on the upper part of the upper frame. The upper mold assembly includes a first longitudinal moving device, an upper mold head disposed at the moving end of the first longitudinal moving device, and an upper template sleeved on the upper mold head. The lower mold assembly includes a second longitudinal moving device and a lower mold base disposed on the moving end of the second longitudinal moving device. The second longitudinal moving device is disposed on the lower frame and the lower mold base is provided with a cavity for filling powder. A first guide component is longitudinally disposed on the upper frame and passes through the upper template and the lower template base; A mandrel assembly, comprising a mounting base mounted on the upper frame, a mandrel assembly disposed on the mounting base, and a third longitudinal moving device connected to the mandrel assembly; the mounting base is located below the lower mold base, and at least a portion of the mandrel assembly is placed in the cavity; A powder feeding device is disposed on one side of the lower mold base. The powder feeding device includes a housing, a powder feeding motor disposed within the housing, a reducer connected to the output shaft of the powder feeding motor, a rocker arm connected to the reducer, a bracket hanging on the rocker arm, a box disposed on the bracket, and a cylinder disposed outside the housing. The output shaft of the reducer extends outside the housing, and the end of the rocker arm is sleeved on the output shaft of the reducer. The end of the rocker arm can be adjusted relative to the output shaft of the reducer. An open slot is provided at the connection position between the bracket and the rocker arm, and the telescopic end of the cylinder is hung on the bracket. A control system, which is used to receive signals and output signals.

2. The powder forming machine with improved feeding structure according to claim 1, characterized in that: The first longitudinal moving device includes a first hydraulic cylinder, a first inner shell sleeved outside the first hydraulic cylinder, a first guide rail disposed on the outer wall of the first inner shell, a first slider disposed on the upper part of the upper frame, and a first outer shell disposed on the outer side of the first inner shell. The first outer shell is connected to the first hydraulic cylinder and the upper frame; the first slider cooperates with the first guide rail; when the first hydraulic cylinder drives the upper mold head to move downward, the first inner shell is guided by the first guide rail and the first slider.

3. The powder forming machine with improved feeding structure according to claim 2, characterized in that: The first guide component includes four arrayed positioning guide posts, and the upper template and the lower mold base are connected to the positioning guide posts through guide sleeves.

4. The powder forming machine with improved feeding structure according to claim 1, characterized in that: The second longitudinal moving device includes a second motor, a second lead screw connected to the output end of the second motor, a second inner shell sleeved on the threaded section of the second lead screw, a second guide rail disposed on the outer circumferential surface of the second inner shell, a second slider mounted on the lower part of the upper frame, and a second outer shell covering the outside of the second inner shell. The second outer shell is connected to the lower part of the upper frame and the optical axis of the second lead screw; at least a portion of the second inner shell extends to connect with the lower mold base; the second slider cooperates with the second guide rail, and when the second motor drives the lower mold base to move, the second inner shell is guided by the second guide rail and the second slider.

5. The powder forming machine with improved feeding structure according to claim 1, characterized in that: The third longitudinal moving device includes a third motor, a third lead screw mounted on the third motor, a third optical axis parallel to the third lead screw, and a third sleeve sleeved on the third lead screw and the third optical axis; the third motor drives the third sleeve to move longitudinally.

6. The powder forming machine with improved feeding structure according to claim 5, characterized in that: The core rod assembly includes a spring fixed to the upper end of the third sleeve, an inner core rod disposed on the third sleeve and abutting against the spring, and an outer core rod disposed on the mounting base; The outer core rod is a hollow structure, and the inner core rod is placed inside the outer core rod.

7. The powder forming machine with improved feeding structure according to claim 1, characterized in that: It includes a second guide assembly, which includes a third guide rail and a third slider that cooperates with the third guide rail. The third guide rail is longitudinally mounted on the upper frame, and the third slider is connected to the upper template.

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