Powder forming press with preloading function and implementation method thereof

Abstract

The application discloses a powder forming press with a preloading function, which comprises a base, a die frame connected to the top of the base, a lower die mechanism installed in the die frame, wherein the lower die mechanism comprises a female die plate, a lower die pressurizing mechanism corresponding to the lower die mechanism installed in the base, an automatic powder feeding mechanism and an upper die plate respectively installed above the female die plate on the die frame, an upper die installed below the upper die plate, a preloading mechanism installed above the upper die plate, an upper die pressurizing mechanism installed above the die frame, an output end of the upper die pressurizing mechanism connected to the preloading mechanism, and a grating corresponding to the female die plate installed on the die frame; and the application further discloses an implementation method of the powder forming press with the preloading function. The preloading cylinder is used to act on the upper die plate, so that the pressure is kept during demolding, and the problem that the stress cannot be effectively released during demolding of products, thereby causing the blank to crack, is solved.

Description

Technical Field

[0001] This disclosure belongs to the field of powder forming press technology, specifically relating to a powder forming press with preloading function and its implementation method. Background Technology

[0002] A powder forming servo press typically consists of a main frame, a mold frame mechanism, a pressurizing component mechanism, an automatic powder feeding mechanism, and an intelligent control system. During operation, the automatic powder feeding mechanism automatically conveys and fills the powder into the cavity of the mold frame mechanism. Then, the powder is pressed by the closing of the upper and lower mold pressurizing components to form the powder.

[0003] Powder forming servo presses are commonly used in industries requiring powder pressing, such as powder metallurgy, precision ceramics, cemented carbide, magnetic materials, and ceramic filters. They are particularly suitable for pressing and forming precision and complex products. This places high demands on the stability, reliability, and consistency of the servo press.

[0004] Chinese Patent Application No. 202421627676.9 discloses a powder press with a preloading mechanism, relating to the field of powder press technology. The preloading mechanism includes a processing table with a pressing groove on its top. A lead screw is installed in a slot on the top of the processing table, and sliding grooves are provided on both sides of the inner wall of the slot. A movable frame is installed outside the lead screw, and sliders are provided on both sides of the movable frame. This invention moves the movable frame towards the pressing groove by rotating the lead screw. When the preloading block and the pressing groove are on the same vertical plane, pressing the pressure plate causes the preloading block to engage with the powder in the pressing groove, preloading and compressing it. The powder in the pressing groove becomes denser due to the preloading and compression. Re-starting the lead screw moves the movable frame and the preloading block away from the pressing groove, preventing collisions between the pressing equipment and the preloading mechanism during the actual pressing process.

[0005] Chinese patent application number 201711271170.3 discloses a powder forming servo press, including a chassis, a mold frame mechanism, and a powder feeding mechanism. The mold frame mechanism includes an upper fixed frame, an upper mold lifting drive device, an upper template, an upper mold pressure bar mounting seat, an upper mold pressure bar, a lower fixed frame, a master mold, a master mold lifting drive device, a lower mold pressure bar, a lower mold pressure bar mounting seat, a master mold cover plate, and a master mold cover plate lifting drive device. The powder feeding mechanism includes a hopper, a powder feeding moving platform, a powder feeding box, a powder feeding lateral movement drive device, a powder filling plate, and a powder filling lateral movement drive device. The present invention has a simple structure, high precision, stable operation, no powder leakage, uniform feeding, and good powder forming effect, which greatly improves production efficiency and product qualification rate.

[0006] The aforementioned patents all suffer from problems such as complex structure, high manufacturing cost, poor operational stability, powder flying and uneven feeding when the powder is fed into the mold, high defect rate, large amount of raw material waste, and low production efficiency. Summary of the Invention

[0007] The purpose of this disclosure is to provide a powder forming press with a preloading function to solve the problems mentioned in the background art. The powder forming press with a preloading function provided by this disclosure is characterized by more intelligent equipment, more comprehensive functions, more stable and reliable operation, and greater suitability for precision production.

[0008] Another objective of this disclosure is to provide a method for implementing a powder forming press with a preloading function.

[0009] To achieve the above objectives, this disclosure provides the following technical solution: a powder forming press with preloading function, including a base, a mold frame connected above the base, a lower mold mechanism installed inside the mold frame, the lower mold mechanism including a concave mold plate, a lower mold pressing mechanism corresponding to the lower mold mechanism installed inside the base, an automatic powder feeding mechanism and an upper mold plate respectively installed on the mold frame above the concave mold plate, an upper mold installed below the upper mold plate, a preloading mechanism installed above the upper mold plate, an upper mold pressing mechanism installed above the mold frame, the output end of the upper mold pressing mechanism connected to the preloading mechanism, and a grating corresponding to the concave mold plate installed on the mold frame, the grating being signal-connected to a PLC controller.

[0010] To enable the vertical movement of the concave template, the lower mold mechanism further includes a lower mold mounting base, which is mounted on the mold frame. Four upper mold connecting guide rods are connected above the lower mold mounting base. The upper template and the concave template are connected to the upper mold connecting guide rods via linear bearings. Four concave mold connecting guide rods are connected to the lower mold mounting base via linear bearings. The upper end of the concave mold connecting guide rod is connected to the concave template, and the lower end of the concave mold connecting guide rod is connected to a concave mold guide rod connecting block. The lower die pressurizing mechanism includes a die pressurizing assembly, which includes a die pressurizing motor and a die pressurizing lead screw assembly. The die pressurizing lead screw assembly is connected to the base via bearings. The output end of the die pressurizing motor is connected to the lead screw of the die pressurizing lead screw assembly via a coupling. A die pressurizing floating plate is threaded onto the lead screw of the die pressurizing lead screw assembly. Two die pressurizing guide rods are connected above the base. The die pressurizing floating plate is connected to the die pressurizing guide rods via linear bearings. A die transition connecting rod is connected above the die pressurizing floating plate. The die transition connecting rod is connected to the die guide rod connecting block. The die pressurizing motor is connected to the PLC controller signal.

[0011] To enable the lower mold to pressurize or retract and depressurize, the lower mold mechanism further includes a lower mold mounting plate. The lower mold mounting plate is connected to the die connecting guide rod via a linear bearing. The lower mold is mounted on the upper part of the lower mold mounting plate, and lower mold connecting guide rods are connected to both sides below the lower mold mounting plate. The lower mold connecting guide rods are connected to the lower mold mounting base via linear bearings. The lower mold pressurizing mechanism also includes a lower second mold pressurizing assembly, which includes a lower second mold pressurizing motor and a lower second mold pressurizing lead screw assembly. The lower second mold pressurizing lead screw assembly is connected to the base via bearings. The output end of the lower second mold pressurizing motor is connected to the lead screw of the lower second mold pressurizing lead screw assembly via a coupling. A lower second mold pressurizing floating plate is threaded onto the lead screw of the lower second mold pressurizing lead screw assembly. Four lower second mold pressurizing guide rods are connected above the base. The lower second mold pressurizing floating plate is connected to the lower second mold pressurizing guide rods via linear bearings. A lower second mold pressurizing transition connecting rod is connected above the lower second mold pressurizing floating plate. The lower second mold pressurizing transition connecting rod is connected to the lower second mold connecting guide rod. The lower second mold pressurizing motor is connected to the PLC controller signal.

[0012] To achieve pressure application or retraction of the upper mold for pressure release, the upper mold pressure mechanism further includes an upper mold pressure motor and an upper mold pressure lead screw assembly. The upper mold pressure lead screw assembly is connected to the base mold frame via bearings. The upper mold pressure motor is mounted above the mold frame, and its output end is connected to the lead screw of the upper mold pressure lead screw assembly via a coupling. An upper mold pressure floating plate is threaded onto the lead screw of the upper mold pressure lead screw assembly. Four upper mold pressure guide rods are connected to the upper mold frame. The upper mold pressure floating plate is connected to the upper mold pressure guide rods via linear bearings. An upper mold pressure transition connecting rod is connected below the upper mold pressure floating plate and is connected to the preloading mechanism. The upper mold pressure motor is connected to the PLC controller signal.

[0013] To achieve pressure holding during demolding, addressing the issue of ineffective stress release leading to blank cracking, and to collect and record the pressure value of each product in real time during production, automatically adjusting the material weight based on pressure information for overpressure or underpressure situations to ensure molding quality, a preloading mechanism is further implemented. This mechanism includes a preloading mechanism mounting plate connected to the upper mold connecting rod via a linear bearing and positioned above the upper template. A pressure sensor is installed at the center of the preloading mechanism mounting plate, connected to a pressure sensor connecting plate which is then connected to the upper mold pressurization mechanism. Preloading cylinders are installed at both ends of the preloading mechanism mounting plate, with their output ends connected to the upper template. Four buffers are also installed on the preloading mechanism mounting plate, with the buffer rod ends of the buffers contacting the upper template. The pressure sensor is connected to the PLC controller signal.

[0014] To automatically feed powder, improve the efficiency of powder molding, and reduce labor intensity, the automatic powder feeding mechanism further includes a powder feeding mechanism base and a powder feeding mechanism upper seat. Both the powder feeding mechanism base and the powder feeding mechanism upper seat are mounted on the mold frame. One side of the powder feeding mechanism base is connected to a guide seat located above the concave mold plate, and a material box is placed above the guide seat. The other side of the powder feeding mechanism base is connected to a motor mounting plate, on which a powder feeding servo motor is mounted. The output end of the powder feeding servo motor is connected to one end of a first swing arm, the other end of the first swing arm is rotatably connected to one end of a second swing arm, and the other end of the second swing arm is rotatably connected to the material box. The automatic powder feeding mechanism also includes a material barrel, inside which a material shortage detector is installed. The material barrel is mounted on the mold frame, and a ball valve is installed at the bottom of the material barrel. The outlet end of the ball valve is connected to the material box through a material pipe. The powder feeding servo motor is connected to the PLC controller signal.

[0015] In order to press the material box firmly onto the guide seat and effectively prevent the powder from scattering, the automatic powder feeding mechanism further includes a pressurizing cylinder. One end of the pressurizing cylinder is rotatably connected to the upper seat of the powder feeding mechanism, and the other end of the pressurizing cylinder is rotatably connected to the second swing arm.

[0016] Furthermore, in this disclosure, a method for implementing a powder forming press with preloading function includes the following steps:

[0017] (a) The operator pours the powder into the material bucket, opens the ball valve, and the powder flows into the material box through the material pipe;

[0018] (II) The operator starts the power supply to debug the mold, and then starts the test pressure mode. The concave mold pressure motor of the lower mold pressure mechanism is activated, which drives the concave plate to move upward to form a powder-filling cavity. At the same time, the powder feeding servo motor is activated, which drives the first swing arm to move, thereby driving the second swing arm to move the material box forward, so that the powder in the material box fills the cavity. Then the material box retracts and resets. The upper mold pressure motor is activated, which drives the upper plate to move downward, thereby driving the upper mold to move down. The lower mold pressure mechanism's lower second mold pressure motor is activated, which drives the lower second mold mounting plate to move upward, thereby driving the lower second mold to move up, completing the mold closing and pressing. During demolding, the output end of the preload cylinder continues to act on the upper plate. The upper mold pressure motor is activated and retracts to complete the pressure relief of the upper mold. Then the preload cylinder is retracted again to complete the preload pressure relief. At the same time, the lower second mold pressure motor is activated, which drives the lower second mold to retract and relieve pressure. The concave mold pressure motor is activated, which drives the concave plate to retract, completing the product demolding. The operator intervenes to confirm the product density, product size, and product cracking.

[0019] (III) After the pressure test is completed, the operator starts the automatic production mode, and the press performs automatic cyclic production according to the pressure test process.

[0020] (iv) During the production process, the pressure value of each product is collected and recorded in real time by pressure sensors. Based on the pressure value information, the weight of the material is automatically adjusted in real time for overpressure and underpressure situations.

[0021] Compared with the prior art, the beneficial effects of this disclosure are:

[0022] 1. The base and mold frame disclosed herein are made of ductile iron, which makes the machine body more stable and the equipment more accurate in operation.

[0023] 2. This invention uses a preloaded cylinder to act on the upper template to maintain pressure during demolding, thus solving the problem that the product cannot effectively eliminate stress release during demolding, which leads to the cracking of the blank.

[0024] 3. In the production process, this disclosure uses pressure sensors to collect and record the pressure value of each product in real time. Based on the pressure value information, the material weight is automatically adjusted in real time for overpressure and underpressure situations to ensure the molding effect.

[0025] 4. This disclosure achieves automatic powder feeding by setting up an automatic powder feeding mechanism, thereby improving the efficiency of powder forming and reducing labor intensity.

[0026] 5. This invention uses a pressurizing cylinder to press the material box tightly against the guide seat, which can effectively prevent the powder from scattering. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure disclosed herein.

[0028] Figure 2 This is a schematic diagram of the structure after the protective plate has been removed.

[0029] Figure 3 This is a schematic diagram of the main structure after the protective plate has been removed.

[0030] Figure 4 This is a schematic diagram of the lower mold mechanism disclosed in this paper.

[0031] Figure 5 This is a schematic diagram of the main structure of the lower mold mechanism disclosed in this invention.

[0032] Figure 6 This is a schematic diagram of the structure of the die pressing assembly disclosed herein.

[0033] Figure 7 This is a schematic diagram of the structure of the two-mode pressurization assembly disclosed herein.

[0034] Figure 8 This is a schematic diagram of the pressure mechanism of the mold disclosed herein.

[0035] Figure 9This is a schematic diagram of the preloading mechanism disclosed herein.

[0036] Figure 10 This is a schematic diagram of the automatic powder feeding mechanism disclosed in this paper.

[0037] In the diagram: 1. Base; 2. Mold frame; 3. Upper mold pressing mechanism; 31. Upper mold pressing motor; 32. Upper mold pressing screw assembly; 33. Upper mold pressing transition connecting rod; 34. Upper mold pressing guide rod; 35. Upper mold pressing floating plate; 4. Grating; 5. Lower mold mechanism; 51. Lower mold mounting base; 52. Concave mold plate; 53. Upper mold connecting guide rod; 54. Lower second mold mounting plate; 55. Concave mold connecting guide rod; 56. Concave mold guide rod connecting block; 57. Lower second mold connecting guide rod; 58. Lower second mold; 6. Lower mold pressing mechanism; 61. Concave mold pressing assembly; 611. Concave mold pressing motor; 612. Concave mold pressing screw assembly; 613. Concave mold transition connecting rod; 614. Concave mold pressing floating plate; 615. Concave mold plate... 62. Lower Second Mold Pressurizing Guide Rod; 621. Lower Second Mold Pressurizing Motor; 622. Lower Second Mold Pressurizing Floating Plate; 623. Lower Second Mold Pressurizing Screw Assembly; 624. Lower Second Mold Pressurizing Transition Connecting Rod; 625. Lower Second Mold Pressurizing Guide Rod; 7. Preloading Mechanism; 71. Preloading Mechanism Mounting Plate; 72. Pressure Sensor Connecting Plate; 73. Pressure Sensor; 74. Preloading Cylinder; 75. Buffer; 8. Automatic Powder Feeding Mechanism; 81. Powder Feeding Mechanism Base; 82. First Swing Arm; 83. Motor Mounting Plate; 84. Pressurizing Cylinder; 85. Powder Feeding Servo Motor; 86. Powder Feeding Mechanism Upper Seat; 87. Second Swing Arm; 88. Material Box; 89. Guide Seat; 9. Upper Template; 91. Upper Mold. Detailed Implementation

[0038] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0039] In the description of this disclosure, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0040] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature 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" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this disclosure, the terms "upper," "lower," "right," "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation. They 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 a limitation of this disclosure. Furthermore, the terms "first" and "second" are used only for descriptive distinction and have no special meaning.

[0042] Example 1

[0043] Please see Figures 1-10 This embodiment provides the following technical solution: a powder forming press with preloading function, including a base 1, a mold frame 2 connected above the base 1, a lower mold mechanism 5 installed inside the mold frame 2, the lower mold mechanism 5 including a concave mold plate 52, a lower mold pressing mechanism 6 corresponding to the lower mold mechanism 5 installed inside the base 1, an automatic powder feeding mechanism 8 and an upper mold plate 9 respectively installed on the mold frame 2 above the concave mold plate 52, an upper mold 91 installed below the upper mold plate 9, a preloading mechanism 7 installed above the upper mold plate 9, an upper mold pressing mechanism 3 installed above the mold frame 2, the output end of the upper mold pressing mechanism 3 connected to the preloading mechanism 7, and a grating 4 corresponding to the concave mold plate 52 installed on the mold frame 2, the grating 4 being signal-connected to a PLC controller.

[0044] By adopting the above technical solution, both the base 1 and the mold frame 2 of this disclosure are made of ductile iron, making the machine body more stable and the equipment's operating precision higher. This disclosure, through the setting of the preloading mechanism 7, effectively solves the problem of ineffective stress release during product demolding, which leads to blank cracking.

[0045] Example 2

[0046] Please see Figures 1-10This embodiment provides the following technical solution: a powder forming press with preloading function, including a base 1, a mold frame 2 connected above the base 1, a lower mold mechanism 5 installed inside the mold frame 2, the lower mold mechanism 5 including a concave mold plate 52, a lower mold pressing mechanism 6 corresponding to the lower mold mechanism 5 installed inside the base 1, an automatic powder feeding mechanism 8 and an upper mold plate 9 respectively installed on the mold frame 2 above the concave mold plate 52, an upper mold 91 installed below the upper mold plate 9, a preloading mechanism 7 installed above the upper mold plate 9, an upper mold pressing mechanism 3 installed above the mold frame 2, the output end of the upper mold pressing mechanism 3 connected to the preloading mechanism 7, and a grating 4 corresponding to the concave mold plate 52 installed on the mold frame 2, the grating 4 being signal-connected to a PLC controller.

[0047] Specifically, the lower mold mechanism 5 also includes a lower mold mounting base 51, which is mounted on the mold frame 2. Four upper mold connecting guide rods 53 are connected to the upper mold mounting base 51. The upper mold plate 9 and the concave mold plate 52 are respectively connected to the upper mold connecting guide rods 53 via linear bearings. Four concave mold connecting guide rods 55 are connected to the lower mold mounting base 51 via linear bearings. The upper end of the concave mold connecting guide rod 55 is connected to the concave mold plate 52, and the lower end of the concave mold connecting guide rod 55 is connected to the concave mold guide rod connecting block 56. The lower die pressurizing mechanism 6 includes a die pressurizing assembly 61, which includes a die pressurizing motor 611 and a die pressurizing lead screw assembly 612. The die pressurizing lead screw assembly 612 is connected to the base 1 via bearings. The output end of the die pressurizing motor 611 is connected to the lead screw of the die pressurizing lead screw assembly 612 via a coupling. A die pressurizing floating plate 614 is threaded onto the lead screw of the die pressurizing lead screw assembly 612. Two die pressurizing guide rods 615 are connected above the base 1. The die pressurizing floating plate 614 is connected to the die pressurizing guide rods 615 via linear bearings. A die transition connecting rod 613 is connected above the die pressurizing floating plate 614. The die transition connecting rod 613 is connected to the die guide rod connecting block 56. The die pressurizing motor 611 is connected to the PLC controller signal.

[0048] By adopting the above technical solution, the die pressing motor 611 drives the die pressing screw assembly 612 to move, thereby driving the die pressing floating plate 614 to move up and down, thus driving the die plate 52 to move up and down.

[0049] Example 3

[0050] Please see Figures 1-10This embodiment provides the following technical solution: a powder forming press with preloading function, including a base 1, a mold frame 2 connected above the base 1, a lower mold mechanism 5 installed inside the mold frame 2, the lower mold mechanism 5 including a concave mold plate 52, a lower mold pressing mechanism 6 corresponding to the lower mold mechanism 5 installed inside the base 1, an automatic powder feeding mechanism 8 and an upper mold plate 9 respectively installed on the mold frame 2 above the concave mold plate 52, an upper mold 91 installed below the upper mold plate 9, a preloading mechanism 7 installed above the upper mold plate 9, an upper mold pressing mechanism 3 installed above the mold frame 2, the output end of the upper mold pressing mechanism 3 connected to the preloading mechanism 7, and a grating 4 corresponding to the concave mold plate 52 installed on the mold frame 2, the grating 4 being signal-connected to a PLC controller.

[0051] Specifically, the lower mold mechanism 5 also includes a lower second mold mounting plate 54, which is connected to the die connecting guide rod 55 via a linear bearing. A lower second mold 58 is mounted on the upper part of the lower second mold mounting plate 54, and lower second mold connecting guide rods 57 are connected to both sides below the lower second mold mounting plate 54. The lower second mold connecting guide rods 57 are connected to the lower mold mounting base 51 via linear bearings. The lower mold pressurizing mechanism 6 also includes a lower second mold pressurizing assembly 62, which includes a lower second mold pressurizing motor 621 and a lower second mold pressurizing lead screw assembly 623. The lower second mold pressurizing lead screw assembly 623 is connected to the base 1 via bearings. The output end of the lower second mold pressurizing motor 621 is connected to the lead screw of the lower second mold pressurizing lead screw assembly 623 via a coupling. A lower second mold pressurizing floating plate 622 is threaded onto the lead screw of the lower second mold pressurizing lead screw assembly 623. Four lower second mold pressurizing guide rods 625 are connected above the base 1. The lower second mold pressurizing floating plate 622 is connected to the lower second mold pressurizing guide rods 625 via linear bearings. A lower second mold pressurizing transition connecting rod 624 is connected above the lower second mold pressurizing floating plate 622. The lower second mold pressurizing transition connecting rod 624 is connected to the lower second mold connecting guide rod 57. The lower second mold pressurizing motor 621 is connected to the PLC controller signal.

[0052] By adopting the above technical solution, the lower second mold pressurizing motor 621 drives the lower second mold pressurizing screw assembly 623 to move, thereby driving the lower second mold pressurizing floating plate 622 to move up and down, thus driving the lower second mold 58 to pressurize or retract and depressurize.

[0053] Example 4

[0054] Please see Figures 1-10This embodiment provides the following technical solution: a powder forming press with preloading function, including a base 1, a mold frame 2 connected above the base 1, a lower mold mechanism 5 installed inside the mold frame 2, the lower mold mechanism 5 including a concave mold plate 52, a lower mold pressing mechanism 6 corresponding to the lower mold mechanism 5 installed inside the base 1, an automatic powder feeding mechanism 8 and an upper mold plate 9 respectively installed on the mold frame 2 above the concave mold plate 52, an upper mold 91 installed below the upper mold plate 9, a preloading mechanism 7 installed above the upper mold plate 9, an upper mold pressing mechanism 3 installed above the mold frame 2, the output end of the upper mold pressing mechanism 3 connected to the preloading mechanism 7, and a grating 4 corresponding to the concave mold plate 52 installed on the mold frame 2, the grating 4 being signal-connected to a PLC controller.

[0055] Specifically, the upper mold pressurizing mechanism 3 includes an upper mold pressurizing motor 31 and an upper mold pressurizing lead screw assembly 32. The upper mold pressurizing lead screw assembly 32 is connected to the base mold frame 2 via bearings. The upper mold pressurizing motor 31 is installed above the mold frame 2. The output end of the upper mold pressurizing motor 31 is connected to the lead screw of the upper mold pressurizing lead screw assembly 32 via a coupling. An upper mold pressurizing floating plate 35 is threaded onto the lead screw of the upper mold pressurizing lead screw assembly 32. Four upper mold pressurizing guide rods 34 are connected to the upper mold frame 2. The upper mold pressurizing floating plate 35 is connected to the upper mold pressurizing guide rods 34 via linear bearings. An upper mold pressurizing transition connecting rod 33 is connected below the upper mold pressurizing floating plate 35. The upper mold pressurizing transition connecting rod 33 is connected to the preloading mechanism 7. The upper mold pressurizing motor 31 is connected to the PLC controller signal.

[0056] By adopting the above technical solution, the upper mold pressurizing motor 31 drives the upper mold pressurizing screw assembly 32 to move, thereby driving the upper mold pressurizing floating plate 35 to move up and down, so as to drive the upper mold 91 to pressurize or retract to release pressure.

[0057] Example 5

[0058] Please see Figures 1-10 This embodiment provides the following technical solution: a powder forming press with preloading function, including a base 1, a mold frame 2 connected above the base 1, a lower mold mechanism 5 installed inside the mold frame 2, the lower mold mechanism 5 including a concave mold plate 52, a lower mold pressing mechanism 6 corresponding to the lower mold mechanism 5 installed inside the base 1, an automatic powder feeding mechanism 8 and an upper mold plate 9 respectively installed on the mold frame 2 above the concave mold plate 52, an upper mold 91 installed below the upper mold plate 9, a preloading mechanism 7 installed above the upper mold plate 9, an upper mold pressing mechanism 3 installed above the mold frame 2, the output end of the upper mold pressing mechanism 3 connected to the preloading mechanism 7, and a grating 4 corresponding to the concave mold plate 52 installed on the mold frame 2, the grating 4 being signal-connected to a PLC controller.

[0059] Specifically, the preloading mechanism 7 includes a preloading mechanism mounting plate 71, which is connected to the upper mold connecting guide rod 53 via a linear bearing. The preloading mechanism mounting plate 71 is positioned above the upper mold plate 9. A pressure sensor 73 is installed at the center of the upper part of the preloading mechanism mounting plate 71. A pressure sensor connecting plate 72 is connected above the pressure sensor 73 and is connected to the upper mold pressurization mechanism 3. Preloading cylinders 74 are installed at both ends of the upper part of the preloading mechanism mounting plate 71. The output end of the preloading cylinder 74 is connected to the upper mold plate 9. Four buffers 75 are also installed on the preloading mechanism mounting plate 71. The buffer rod ends of the buffers 75 abut against the upper mold plate 9. The pressure sensor 73 is connected to the PLC controller signal.

[0060] By adopting the above technical solution, this disclosure uses a preloaded cylinder 74 acting on the upper mold plate 9 to achieve pressure holding during demolding, thus solving the problem of ineffective stress release during product demolding, which leads to blank cracking. During the production process, this disclosure uses a pressure sensor 73 to collect and record the pressure value of each product in real time. Based on the pressure value information, the material weight is automatically adjusted in real time for overpressure and underpressure situations to ensure the molding effect.

[0061] Example 6

[0062] Please see Figures 1-10 This embodiment provides the following technical solution: a powder forming press with preloading function, including a base 1, a mold frame 2 connected above the base 1, a lower mold mechanism 5 installed inside the mold frame 2, the lower mold mechanism 5 including a concave mold plate 52, a lower mold pressing mechanism 6 corresponding to the lower mold mechanism 5 installed inside the base 1, an automatic powder feeding mechanism 8 and an upper mold plate 9 respectively installed on the mold frame 2 above the concave mold plate 52, an upper mold 91 installed below the upper mold plate 9, a preloading mechanism 7 installed above the upper mold plate 9, an upper mold pressing mechanism 3 installed above the mold frame 2, the output end of the upper mold pressing mechanism 3 connected to the preloading mechanism 7, and a grating 4 corresponding to the concave mold plate 52 installed on the mold frame 2, the grating 4 being signal-connected to a PLC controller.

[0063] Specifically, the automatic powder feeding mechanism 8 includes a powder feeding mechanism base 81 and a powder feeding mechanism upper seat 86. Both the powder feeding mechanism base 81 and the powder feeding mechanism upper seat 86 are mounted on the mold frame 2. One side of the powder feeding mechanism base 81 is connected to a guide seat 89 located above the concave mold plate 52. A material box 88 is placed above the guide seat 89. The other side of the powder feeding mechanism base 81 is connected to a motor mounting plate 83. A powder feeding servo motor 85 is mounted on the motor mounting plate 83. The output end of the powder feeding servo motor 85 is connected to one end of a first swing arm 82. The other end of the first swing arm 82 is rotatably connected to one end of a second swing arm 87. The other end of the second swing arm 87 is rotatably connected to the material box 88. The automatic powder feeding mechanism 8 also includes a material barrel. A material shortage detector is installed inside the material barrel. The material barrel is mounted on the mold frame 2. A ball valve is installed at the bottom of the material barrel. The outlet end of the ball valve is connected to the material box 88 through a material pipe. The powder feeding servo motor 85 is connected to the PLC controller signal.

[0064] By adopting the above technical solutions, automatic powder feeding can be achieved, improving the efficiency of powder forming and reducing labor intensity.

[0065] Example 7

[0066] Please see Figures 1-10 This embodiment provides the following technical solution: a powder forming press with preloading function, including a base 1, a mold frame 2 connected above the base 1, a lower mold mechanism 5 installed inside the mold frame 2, the lower mold mechanism 5 including a concave mold plate 52, a lower mold pressing mechanism 6 corresponding to the lower mold mechanism 5 installed inside the base 1, an automatic powder feeding mechanism 8 and an upper mold plate 9 respectively installed on the mold frame 2 above the concave mold plate 52, an upper mold 91 installed below the upper mold plate 9, a preloading mechanism 7 installed above the upper mold plate 9, an upper mold pressing mechanism 3 installed above the mold frame 2, the output end of the upper mold pressing mechanism 3 connected to the preloading mechanism 7, and a grating 4 corresponding to the concave mold plate 52 installed on the mold frame 2, the grating 4 being signal-connected to a PLC controller.

[0067] Specifically, the automatic powder feeding mechanism 8 also includes a pressurizing cylinder 84, one end of which is rotatably connected to the upper seat 86 of the powder feeding mechanism, and the other end of which is rotatably connected to the second swing arm 87.

[0068] By adopting the above technical solution, the pressurizing cylinder 84 acts on the material box 88, pressing the material box 88 tightly onto the guide seat 89, which can effectively prevent the powder from scattering.

[0069] Example 8

[0070] Furthermore, the implementation method of a powder forming press with preloading function as described in this disclosure includes the following steps:

[0071] (i) The operator pours the powder into the material bucket, opens the ball valve, and the powder flows into the material box 88 through the material pipe;

[0072] (II) The operator starts the power supply to debug the mold, and then starts the test pressure mode. The concave mold pressure motor 611 of the lower mold pressure mechanism 6 is activated, driving the concave plate 52 to move upward and form a powder-filling cavity. At the same time, the powder feeding servo motor 85 is activated, driving the first swing arm 82 to move, thereby driving the second swing arm 87 to move the material box 88 forward, so that the powder in the material box 88 fills the cavity. Then the material box 88 retracts and resets. The upper mold pressure motor 31 is activated, driving the upper plate 9 to move downward, thereby driving the upper mold 91 to move downward. The lower mold pressure motor 621 of the lower mold pressure mechanism 6 is activated. The lower mold mounting plate 54 moves upward, which in turn moves the lower mold 58 upward, completing the mold closing and pressing. During demolding, the output end of the preload cylinder 74 continues to act on the upper template 9, and the upper mold pressure motor 31 moves back to release the pressure of the upper mold. Then the preload cylinder 74 moves back again to release the preload pressure. At the same time, the lower mold pressure motor 621 moves to drive the lower mold 58 to move back to release pressure, and the concave mold pressure motor 611 moves to drive the concave template 52 to move back, completing the demolding of the product. The operator intervenes to confirm the product density, product size, and product cracking.

[0073] (III) After the pressure test is completed, the operator starts the automatic production mode, and the press performs automatic cyclic production according to the pressure test process.

[0074] (iv) During the production process, the pressure value of each product is collected and recorded in real time by pressure sensor 73. Based on the pressure value information, the weight of the material is automatically adjusted in real time for overpressure and underpressure situations.

[0075] In summary, both the base 1 and the mold frame 2 of this disclosure are made of ductile iron, making the machine body more stable and the equipment's operating precision higher. This disclosure uses a pre-loading cylinder 74 acting on the upper mold plate 9 to maintain pressure during demolding, solving the problem of ineffective stress release during demolding, which can lead to blank cracking. During production, this disclosure uses a pressure sensor 73 to collect and record the pressure value of each product in real time. Based on the pressure value information, it automatically adjusts the material weight in real time for overpressure and underpressure situations to ensure the molding effect. This disclosure uses an automatic powder feeding mechanism 8 to achieve automatic powder feeding, improving the efficiency of powder molding and reducing labor intensity. This disclosure uses a pressurizing cylinder 84 acting on the material box 88 to press the material box 88 tightly onto the guide seat 89, effectively preventing powder scattering.

[0076] Although embodiments of the present disclosure have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A powder forming press with preloading function, characterized in that: The system includes a base, a mold frame connected above the base, a lower mold mechanism installed inside the mold frame, the lower mold mechanism including a concave mold plate, a lower mold pressing mechanism corresponding to the lower mold mechanism installed inside the base, an automatic powder feeding mechanism and an upper mold plate installed on the mold frame above the concave mold plate, an upper mold installed below the upper mold plate, a preloading mechanism installed above the upper mold plate, an upper mold pressing mechanism installed above the mold frame, the output end of the upper mold pressing mechanism connected to the preloading mechanism, and a grating corresponding to the concave mold plate installed on the mold frame, the grating being connected to the PLC controller signal.

2. The powder forming press with preloading function according to claim 1, characterized in that: The lower mold mechanism also includes a lower mold mounting base, which is mounted on the mold frame. Four upper mold connecting guide rods are connected above the lower mold mounting base. The upper mold plate and the concave mold plate are respectively connected to the upper mold connecting guide rods through linear bearings. Four concave mold connecting guide rods are connected to the lower mold mounting base through linear bearings. The upper end of the concave mold connecting guide rod is connected to the concave mold plate, and the lower end of the concave mold connecting guide rod is connected to the concave mold guide rod connecting block.

3. A powder forming press with preloading function according to claim 2, characterized in that: The lower die pressurizing mechanism includes a die pressurizing assembly, which includes a die pressurizing motor and a die pressurizing lead screw assembly. The die pressurizing lead screw assembly is connected to the base via bearings. The output end of the die pressurizing motor is connected to the lead screw of the die pressurizing lead screw assembly via a coupling. A die pressurizing floating plate is threaded onto the lead screw of the die pressurizing lead screw assembly. Two die pressurizing guide rods are connected above the base. The die pressurizing floating plate is connected to the die pressurizing guide rods via linear bearings. A die transition connecting rod is connected above the die pressurizing floating plate. The die transition connecting rod is connected to the die guide rod connecting block. The die pressurizing motor is connected to the PLC controller via signals.

4. A powder forming press with preloading function according to claim 2, characterized in that: The lower mold mechanism also includes a lower second mold mounting plate, which is connected to the die connecting guide rod via a linear bearing. The lower second mold is mounted on the upper part of the lower second mold mounting plate, and lower second mold connecting guide rods are connected to both sides below the lower second mold mounting plate. The lower second mold connecting guide rods are connected to the lower mold mounting base via linear bearings.

5. A powder forming press with preloading function according to claim 4, characterized in that: The lower mold pressurizing mechanism also includes a lower second mold pressurizing assembly, which includes a lower second mold pressurizing motor and a lower second mold pressurizing lead screw assembly. The lower second mold pressurizing lead screw assembly is connected to the base via bearings. The output end of the lower second mold pressurizing motor is connected to the lead screw of the lower second mold pressurizing lead screw assembly via a coupling. A lower second mold pressurizing floating plate is threaded onto the lead screw of the lower second mold pressurizing lead screw assembly. Four lower second mold pressurizing guide rods are connected above the base. The lower second mold pressurizing floating plate is connected to the lower second mold pressurizing guide rods via linear bearings. A lower second mold pressurizing transition connecting rod is connected above the lower second mold pressurizing floating plate. The lower second mold pressurizing transition connecting rod is connected to the lower second mold connecting guide rod. The lower second mold pressurizing motor is connected to the PLC controller signal.

6. A powder forming press with preloading function according to claim 1, characterized in that: The upper mold pressurizing mechanism includes an upper mold pressurizing motor and an upper mold pressurizing lead screw assembly. The upper mold pressurizing lead screw assembly is connected to the base mold frame via bearings. The upper mold pressurizing motor is mounted above the mold frame. The output end of the upper mold pressurizing motor is connected to the lead screw of the upper mold pressurizing lead screw assembly via a coupling. An upper mold pressurizing floating plate is threaded onto the lead screw of the upper mold pressurizing lead screw assembly. Four upper mold pressurizing guide rods are connected to the upper mold frame. The upper mold pressurizing floating plate is connected to the upper mold pressurizing guide rods via linear bearings. An upper mold pressurizing transition connecting rod is connected below the upper mold pressurizing floating plate. The upper mold pressurizing transition connecting rod is connected to the preloading mechanism. The upper mold pressurizing motor is connected to the PLC controller signal.

7. A powder forming press with preloading function according to claim 1, characterized in that: The preloading mechanism includes a preloading mechanism mounting plate, which is connected to the upper mold connecting guide rod via a linear bearing. The preloading mechanism mounting plate is positioned above the upper mold plate. A pressure sensor is installed at the center of the upper part of the preloading mechanism mounting plate. A pressure sensor connecting plate is connected above the pressure sensor and is connected to the upper mold pressurization mechanism. Preloading cylinders are installed at both ends of the upper part of the preloading mechanism mounting plate. The output end of the preloading cylinder is connected to the upper mold plate. Four buffers are also installed on the preloading mechanism mounting plate. The buffer rod ends of the buffers abut against the upper mold plate. The pressure sensor is connected to the PLC controller signal.

8. A powder forming press with preloading function according to claim 1, characterized in that: The automatic powder feeding mechanism includes a powder feeding mechanism base and a powder feeding mechanism upper seat, both of which are mounted on a mold frame. One side of the powder feeding mechanism base is connected to a guide seat located above the concave mold plate, and a material box is placed above the guide seat. The other side of the powder feeding mechanism base is connected to a motor mounting plate, on which a powder feeding servo motor is mounted. The output end of the powder feeding servo motor is connected to one end of a first swing arm, the other end of the first swing arm is rotatably connected to one end of a second swing arm, and the other end of the second swing arm is rotatably connected to the material box. The automatic powder feeding mechanism also includes a material barrel, inside which a material shortage detector is installed. The material barrel is mounted on the mold frame, and a ball valve is installed at the bottom of the material barrel. The outlet end of the ball valve is connected to the material box via a material pipe. The powder feeding servo motor is connected to a PLC controller.

9. A powder forming press with preloading function according to claim 8, characterized in that: The automatic powder feeding mechanism also includes a pressurizing cylinder, one end of which is rotatably connected to the upper seat of the powder feeding mechanism, and the other end of which is rotatably connected to the second swing arm.

10. A method for implementing a powder forming press with preloading function according to any one of claims 1-9, characterized in that, Includes the following steps: (a) The operator pours the powder into the material bucket, opens the ball valve, and the powder flows into the material box through the material pipe; (II) The operator starts the power supply to debug the mold, and then starts the test pressure mode. The concave mold pressure motor of the lower mold pressure mechanism is activated, which drives the concave plate to move upward to form a powder-filling cavity. At the same time, the powder feeding servo motor is activated, which drives the first swing arm to move, thereby driving the second swing arm to move the material box forward, so that the powder in the material box fills the cavity. Then the material box retracts and resets. The upper mold pressure motor is activated, which drives the upper plate to move downward, thereby driving the upper mold to move down. The lower mold pressure mechanism's lower second mold pressure motor is activated, which drives the lower second mold mounting plate to move upward, thereby driving the lower second mold to move up, completing the mold closing and pressing. During demolding, the output end of the preload cylinder continues to act on the upper plate. The upper mold pressure motor is activated and retracts to complete the pressure relief of the upper mold. Then the preload cylinder is retracted again to complete the preload pressure relief. At the same time, the lower second mold pressure motor is activated, which drives the lower second mold to retract and relieve pressure. The concave mold pressure motor is activated, which drives the concave plate to retract, completing the product demolding. The operator intervenes to confirm the product density, product size, and product cracking. (III) After the pressure test is completed, the operator starts the automatic production mode, and the press performs automatic cyclic production according to the pressure test process. (iv) During the production process, the pressure value of each product is collected and recorded in real time by pressure sensors. Based on the pressure value information, the weight of the material is automatically adjusted in real time for overpressure and underpressure situations.

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