Powder forming hydraulic press

Abstract

The application discloses a powder forming hydraulic press and belongs to the field of hydraulic presses. The powder forming hydraulic press comprises a base, a pressing seat, a pressing plate, an upper seat and a first hydraulic rod. The upper surfaces of the pressing plate and the pressing seat are fixedly connected with cylinders for containing lubricating oil. The cylinders and the stand are located on the same axis. A first piston cylinder is fixedly connected in the upper cylinder. A piston plate is slidably connected in the first piston cylinder. A first spring is fixedly connected between the piston plate and the top wall inside the first piston cylinder. A first piston rod is fixedly connected to the lower surface of the piston plate. An oil extraction pipe and an oil discharge pipe are fixedly connected to the two sides of the lower part of the piston plate respectively. The oil extraction pipe and the oil discharge pipe are both provided with a one-way valve. The cylinders and the first piston cylinder are arranged. The lubricating oil in the cylinders is passively applied on the stand to lubricate the connection between the stand and the pressing seat and the pressing plate, thereby preventing the stand from being burned due to long-term friction.

Description

Technical Field

[0001] This invention relates to the field of hydraulic press technology, specifically to a powder forming hydraulic press. Background Technology

[0002] Powder metallurgy forming is one of the basic processes in powder metallurgy production. Its purpose is to turn loose powder into semi-finished or finished products with predetermined geometric shapes, sizes, densities, and strengths. Among them, 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 into a dense rod or part.

[0003] Hydraulic presses are used in the powder molding process. The column is a major component of the hydraulic press. The column not only supports the upper beam and the oil cylinder and bears the working tension, but also guides the moving crossbeam. Because the column of the hydraulic press is used frequently, it is prone to wear, which affects the use of the hydraulic press. Summary of the Invention

[0004] The purpose of this invention is to provide a powder forming hydraulic press that has the advantage of reducing column wear and solves the problems in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a powder forming hydraulic press, comprising a base, a pressure seat, a pressure plate, a top seat, and a first hydraulic rod. The first hydraulic rod is fixedly connected to the middle of the top seat. The pressure plate is fixedly connected to the output end of the first hydraulic rod. Four second hydraulic rods are fixedly connected to the four corners of the base and are fixedly connected to the pressure seat through the four second hydraulic rods. A column is fixedly connected between the top seat and the base. Through holes that mate with the column are provided on the pressure seat and the pressure plate. A cylinder for holding lubricating oil is fixedly connected to the upper surface of both the pressure plate and the pressure seat. The cylinder is connected to the column. Located on the same axis, a first piston cylinder is fixedly connected inside the upper cylinder, a piston plate is slidably connected inside the first piston cylinder, a first spring is fixedly connected between the piston plate and the top wall inside the first piston cylinder, a first piston rod is fixedly connected to the lower surface of the piston plate, the lower cylinder intermittently abuts against the first piston rod, an oil suction pipe and an oil discharge pipe are fixedly connected to the two sides of the lower part of the piston plate respectively, a one-way valve is provided on both the oil suction pipe and the oil discharge pipe, a counterweight ball is fixedly connected to the bottom of the oil suction pipe, and a hole is opened on the pressure plate to cooperate with the oil suction pipe and the first piston rod.

[0006] Preferably, a first bracket is fixedly connected to the side of the pressure seat, and a rectangular box for feeding material to the mold on the pressure seat is slidably connected to the first bracket. A third hydraulic rod is fixedly connected between the rectangular box and the first bracket.

[0007] Preferably, mounting brackets are fixedly connected to both sides of the first bracket, and a first box for transferring metal powder is fixedly connected to the middle of the mounting bracket. The bottom of the first box is slidably connected to the upper surface of the rectangular box, and the rectangular box is intermittently connected to the first box. A sliding rod is fixedly connected between the first bracket and the first box. An L-shaped plate for controlling the unloading of the first box is slidably connected to the sliding rod. A second spring is sleeved on the sliding rod. The two ends of the second spring are fixedly connected to the L-shaped plate and the first bracket, respectively. The rectangular box and the L-shaped plate intermittently abut against each other.

[0008] Preferably, a feeding pipe is fixedly connected to the top of the first box, and a second box for holding metal powder is fixedly connected to one end of the feeding pipe away from the first box. The second box is placed on the ground, and the height of the second box is higher than that of the first box.

[0009] Preferably, a second bracket is fixedly connected to the side of the pressure seat near the first bracket, a push block for ejecting the shaped product is slidably connected to the second bracket, and a fourth hydraulic rod is fixedly connected to the second bracket, with the output end of the fourth hydraulic rod fixedly connected to the push block.

[0010] Preferably, the upper surface of the pressure seat is fixedly connected to a frame for limiting the pressure plate, and the frame is provided with a notch for the rectangular box and the push block to move.

[0011] Preferably, an absorption cover is fixedly connected to the bottom of the push block, the absorption cover is in contact with the upper surface of the pressure seat, a lifting pump is fixedly connected to the outer wall of the second box, an absorption pipe is installed on the lifting pump, one end of the absorption pipe is connected to the absorption cover, and the other end of the absorption pipe is fixedly connected to a discharge cover, the discharge cover is located directly above the second box.

[0012] Preferably, a rectangular frame is installed on the top of the second housing, a first filter plate is fixedly connected to the lower part of the rectangular frame, a second filter plate is slidably connected to the middle part of the rectangular frame, there is a gap between the second filter plate and the first filter plate, and the second filter plate is located at the lower part of the discharge hood.

[0013] Preferably, a second piston cylinder is fixedly connected to the middle of the first support, a second piston rod is slidably connected inside the second piston cylinder, the rectangular box intermittently abuts against the second piston rod, a third piston cylinder is fixedly connected to the outer wall of the rectangular frame, a pipe is fixedly connected between the second piston cylinder and the third piston cylinder, a third piston rod is slidably connected inside the third piston cylinder, a turntable is rotatably connected to the outer wall of the rectangular frame, a helical rod is fixedly connected to the upper surface of the turntable, an eccentric rod is fixedly connected to the lower surface of the turntable, a straight groove that mates with the eccentric rod is provided on the second filter plate, a hole that mates with the helical rod is provided inside the third piston rod, and a slider is fixedly connected inside the hole, the slider is slidably connected to a helical groove on the side wall of the helical rod.

[0014] Preferably, a retaining ring is fixedly connected to the side wall of the rectangular box, and a retaining groove that mates with the retaining ring is provided on the end side wall of the second piston rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. This invention, by setting up a cylindrical cylinder and a first piston cylinder, allows the lubricating oil inside the cylindrical cylinder to be passively applied to the column, providing lubrication for the connection between the column and the pressure seat and pressure plate, preventing long-term friction and burning of the column. The first piston rod drives the piston plate to slide into the first piston cylinder, thereby generating negative pressure inside the first piston cylinder, which causes the lubricating oil in the lower cylindrical cylinder to be drawn into the first piston cylinder through the oil extraction pipe. When the two move away from each other, the elastic force of the first spring causes the piston plate to slide down, and the lubricating oil drawn into the first piston cylinder is squeezed and discharged into the upper cylindrical cylinder, thereby improving the utilization rate of the lubricating oil.

[0017] 2. By setting up a rectangular box, when the rectangular box slides to the cavity position on the pressure seat, the metal powder inside the rectangular box can enter the cavity of the pressure seat to complete the feeding.

[0018] 3. By setting a pusher block, after the product is squeezed and pushed out, the fourth hydraulic rod operates. At this time, the pusher block at the output end of the fourth hydraulic rod moves towards the product and pushes the product away from the pressure seat.

[0019] 4. By setting a first filter plate and a second filter plate, the metal powder recovered on the upper part of the second filter plate can be shaken when the second filter plate slides relative to the rectangular frame. At this time, the metal powder is sieved and leaks to the upper part of the first filter plate. The inner diameter of the filter holes on the second filter plate is larger than that of the first filter plate, and there is a gap between the two. In this way, the metal powder that may clump can be squeezed and rubbed to refine it for reuse. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure at the border of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the cylindrical part of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the first piston cylinder of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure at the first spring of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the first support of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the slide bar in this invention;

[0027] Figure 8 This is a schematic diagram of the structure of the retaining ring of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure at the second support of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of the screw rod in this invention.

[0030] In the diagram: 1. Base; 11. Second hydraulic rod; 12. Pressure seat; 13. Frame; 14. Pressure plate; 15. Top seat; 16. First hydraulic rod; 17. Column; 2. Cylinder; 21. First piston cylinder; 22. First spring; 23. Piston plate; 24. First piston rod; 25. Oil suction pipe; 26. Oil discharge pipe; 27. Check valve; 28. Counterweight ball; 3. First bracket; 31. Third hydraulic rod; 32. Mounting bracket; 33. First housing; 331. Feed pipe; 34. Rectangular box; 341. 35. Snap ring; 36. Slide rod; 37. Second spring; 38. L-shaped plate; 39. Second piston cylinder; 40. Second piston rod; 51. Second bracket; 42. Fourth hydraulic rod; 43. Push block; 44. Absorption hood; 45. Absorption pipe; 46. Lifting pump; 57. Discharge hood; 58. Second housing; 59. Rectangular frame; 50. First filter plate; 50. Second filter plate; 51. Third piston cylinder; 52. Pipeline; 53. Third piston rod; 54. Turntable; 55. Helical rod; 56. Slider; 57. Eccentric rod. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0032] Example 1

[0033] Reference Figures 1-5 This invention provides a technical solution: a powder forming hydraulic press, comprising a base 1, a pressure seat 12, a pressure plate 14, a top seat 15, and a first hydraulic rod 16. The first hydraulic rod 16 is fixedly connected to the middle of the top seat 15, and the pressure plate 14 is fixedly connected to the output end of the first hydraulic rod 16. Four second hydraulic rods 11 are fixedly connected to the four corners of the base 1 and are fixedly connected to the pressure seat 12 through the four second hydraulic rods 11. A column 17 is fixedly connected between the top seat 15 and the base 1. Through holes that mate with the column 17 are opened on the pressure seat 12 and the pressure plate 14. A cylinder 2 for holding lubricating oil is fixedly connected to the upper surface of both the pressure plate 14 and the pressure seat 12. The cylinder 2 is connected to the column 17. On the same axis, a first piston cylinder 21 is fixedly connected inside the upper cylinder 2. A piston plate 23 is slidably connected inside the first piston cylinder 21. A first spring 22 is fixedly connected between the piston plate 23 and the top wall inside the first piston cylinder 21. A first piston rod 24 is fixedly connected to the lower surface of the piston plate 23. The lower cylinder 2 and the first piston rod 24 abut against each other intermittently. An oil suction pipe 25 and an oil discharge pipe 26 are fixedly connected to the two sides of the lower part of the piston plate 23, respectively. A one-way valve 27 is provided on both the oil suction pipe 25 and the oil discharge pipe 26. A counterweight ball 28 is fixedly connected to the bottom of the oil suction pipe 25. A hole is opened on the pressure plate 14 to cooperate with the oil suction pipe 25 and the first piston rod 24.

[0034] In use, the upper mold is installed on the lower surface of the pressure plate 14. A cavity is formed on the pressure seat 12, and an ejector pin is provided in the middle of the base 1 to eject the product from the cavity. Metal powder is injected into the cavity. The first hydraulic rod 16 moves, causing the pressure plate 14 to move downwards. At this time, the upper mold at the bottom of the pressure plate 14 extrudes and shapes the metal powder in the cavity. Subsequently, the four second hydraulic rods 11 retract, bringing the pressure seat 12 closer to the base 1. The ejector pin on the base 1 then ejects the product from the cavity of the pressure seat 12. The column 17 provides support for the entire device and facilitates the movement of the pressure seat 12 and the pressure plate 14. The movement is limited. The cylinders 2 on the pressure seat 12 and the pressure plate 14 are filled with lubricating oil. When the pressure seat 12 and the pressure plate 14 slide along the column 17, the lubricating oil in the cylinder 2 is passively coated on the column 17 to lubricate the connection between the column 17 and the pressure seat 12 and the pressure plate 14, and to prevent the column 17 from being burned by long-term friction. The travel of the pressure plate 14 is large, so the lubricating oil in the upper cylinder 2 is consumed faster. In addition, the lubricating oil coated on the upper part of the column 17 can drip into the lower cylinder 2 due to gravity, resulting in a larger amount of lubricating oil in the lower cylinder 2.

[0035] When the pressure plate 14 approaches the pressure seat 12, the first piston rod 24 in the first piston cylinder 21 inside the upper cylinder 2 can contact and be squeezed against the bottom wall of the lower cylinder 2. At this time, the first piston rod 24 is squeezed and slides upward. At the same time, the oil extraction pipe 25 is affected by the gravity of the counterweight ball 28 and falls vertically downward, thus ensuring that the lower end of the oil extraction pipe 25 can enter the lower cylinder 2. Then, the first piston rod 24 drives the piston plate 23 to slide into the first piston cylinder 21. The negative pressure generated in the first piston cylinder 21 causes the lubricating oil in the lower cylinder 2 to be drawn into the first piston cylinder 21 through the oil extraction pipe 25. When the two move away from each other, the elastic force of the first spring 22 causes the piston plate 23 to slide down. The lubricating oil drawn into the first piston cylinder 21 is squeezed and discharged into the upper cylinder 2, improving the utilization rate of lubricating oil and preventing excessive lubricating oil from accumulating in the bottom cylinder 2 and overflowing.

[0036] Example 2

[0037] Reference Figure 1 , Figure 2 , Figure 6 and Figure 7 Based on Embodiment 1, a further provision is that a first bracket 3 is fixedly connected to the side of the pressure seat 12, and a rectangular box 34 for feeding material to the mold on the pressure seat 12 is slidably connected to the first bracket 3. A third hydraulic rod 31 is fixedly connected between the rectangular box 34 and the first bracket 3.

[0038] When the third hydraulic rod 31 is activated and extends or retracts, it can drive the rectangular box 34 to slide on the upper surface of the pressure seat 12. When the rectangular box 34 slides to the cavity position on the pressure seat 12, the metal powder in the rectangular box 34 can enter the cavity of the pressure seat 12 to complete the material replenishment.

[0039] Mounting brackets 32 are fixedly connected to both sides of the first bracket 3. A first box 33 for transferring metal powder is fixedly connected to the middle of the mounting bracket 32. The bottom of the first box 33 is slidably connected to the upper surface of the rectangular box 34, and the rectangular box 34 is intermittently connected to the first box 33. A sliding rod 35 is fixedly connected between the first bracket 3 and the first box 33. An L-shaped plate 37 for controlling the unloading of the first box 33 is slidably connected to the sliding rod 35. A second spring 36 is sleeved on the sliding rod 35. The two ends of the second spring 36 are fixedly connected to the L-shaped plate 37 and the first bracket 3, respectively. The rectangular box 34 and the L-shaped plate 37 intermittently abut against each other.

[0040] The first box 33 is used for the transfer and temporary storage of metal powder. When the third hydraulic rod 31 moves toward the first box 33, it can push the L-shaped plate 37. Since the lower surface of the first box 33 is slidably connected to the upper surface of the rectangular box 34, the metal powder in the first box 33 can enter the rectangular box 34 after the L-shaped plate 37 is pushed, thus replenishing the rectangular box 34 in preparation for the next extrusion molding. The sliding rod 35 limits the sliding of the L-shaped plate 37. When the rectangular box 34 moves away from the first box 33, the L-shaped plate 37 is pushed to the lower part of the first box 33 by the action of the second spring 36, which blocks the lower port of the first box 33, thereby preventing the leakage and waste of metal powder in the first box 33.

[0041] A feeding pipe 331 is fixedly connected to the top of the first box 33. A second box 5 for holding metal powder is fixedly connected to one end of the feeding pipe 331 away from the first box 33. The second box 5 is placed on the ground and its height is higher than that of the first box 33.

[0042] The second box 5 is used to store metal powder, and the height of the second box 5 is higher than that of the first box 33. As a result, the feeding pipe 331 between the first box 33 and the second box 5 is in an upward state, so that the metal powder in the second box 5 can slide down the feeding pipe 331 into the first box 33 to complete the replenishment of the first box 33.

[0043] Example 3

[0044] Reference Figure 1 , Figure 2 , Figure 7 , Figure 8 , Figure 9 and Figure 10Based on Embodiment 2, a second support 4 is fixedly connected to the side of the pressure seat 12 near the first support 3. A push block 42 for ejecting the molded product is slidably connected to the second support 4. A fourth hydraulic rod 41 is fixedly connected to the second support 4, and the output end of the fourth hydraulic rod 41 is fixedly connected to the push block 42.

[0045] After the product is extruded and pushed out, the fourth hydraulic rod 41 operates. At this time, the push block 42 at the output end of the fourth hydraulic rod 41 moves towards the product and pushes the product away from the pressure seat 12. After the product is pushed away from the pressure seat 12, the fourth hydraulic rod 41 retracts, and the push block 42 is driven back to its original position.

[0046] The upper surface of the pressure seat 12 is fixedly connected to a frame 13 for limiting the pressure plate 14. The frame 13 is provided with a notch for the rectangular box 34 and the push block 42 to move.

[0047] When the pressure plate 14 moves toward the pressure seat 12 and extrudes the powder in the middle cavity of the pressure seat 12, the side wall of the pressure plate 14 can fit against the inner wall of the frame 13. When the pressure plate 14 fits against the inner wall of the frame 13, the frame 13 can limit the pressure plate 14. Thus, when the pressure plate 14 is subjected to the force of the first hydraulic rod 16 to extrude and form the product, the frame 13 restricts the position of the pressure plate 14, preventing the pressure plate 14 from tilting against the column 17 after being subjected to force, which would cause the column 17 to bend or burn. The notch on the frame 13 ensures that the movement of the rectangular box 34 and the push block 42 will not be interfered with.

[0048] The bottom of the push block 42 is fixedly connected to the absorption cover 43, which is in contact with the upper surface of the pressure seat 12. The outer wall of the second box 5 is fixedly connected to the lifting pump 45, and the lifting pump 45 is equipped with an absorption pipe 44. One end of the absorption pipe 44 is connected to the absorption cover 43, and the other end of the absorption pipe 44 is fixedly connected to the discharge cover 46, which is located directly above the second box 5.

[0049] When the rectangular box 34 feeds material into the cavity in the middle of the pressure seat 12, it is unavoidable that a small amount of metal powder will leak onto the upper surface of the pressure seat 12. At this time, the lifting pump 45 is started. Since the absorption pipe 44 on the lifting pump 45 is connected to the absorption cover 43, and the absorption cover 43 is located at the lower part of the push block 42, the absorption cover 43 can absorb most of the metal powder on the upper surface of the pressure seat 12 when it moves with the push block 42. The absorbed metal powder is then moved through the absorption pipe 44 to the discharge cover 46 and discharged into the second box 5 at the bottom, thereby improving the utilization rate of the metal powder.

[0050] Example 4

[0051] Reference Figure 1 , Figure 2 , Figure 7 , Figure 8 , Figure 9 and Figure 10 Furthermore, based on Embodiment 3, a rectangular frame 51 is installed on the top of the second housing 5, a first filter plate 52 is fixedly connected to the lower part of the rectangular frame 51, a second filter plate 53 is slidably connected to the middle part of the rectangular frame 51, there is a gap between the second filter plate 53 and the first filter plate 52, and the second filter plate 53 is located at the lower part of the discharge hood 46.

[0052] The second filter plate 53 is located at the lower part of the discharge hood 46, so that the metal powder discharged through the discharge hood 46 can fall onto the upper part of the second filter plate 53. When the second filter plate 53 slides relative to the rectangular frame 51, the metal powder collected on its upper part can be shaken. At this time, the metal powder is sieved and leaks to the upper part of the first filter plate 52. The inner diameter of the filter holes on the second filter plate 53 is larger than that of the first filter plate 52, and there is a gap between the two. This allows the metal powder that may clump to be squeezed and rubbed into finer particles. The fined metal powder enters the second housing 5 through the first filter plate 52.

[0053] A second piston cylinder 38 is fixedly connected to the middle of the first support 3. A second piston rod 39 is slidably connected inside the second piston cylinder 38. A rectangular box 34 intermittently abuts against the second piston rod 39. A third piston cylinder 54 is fixedly connected to the outer wall of the rectangular frame 51. A pipe 541 is fixedly connected between the second piston cylinder 38 and the third piston cylinder 54. A third piston rod 55 is slidably connected inside the third piston cylinder 54. A turntable 56 is rotatably connected to the outer wall of the rectangular frame 51. A spiral rod 57 is fixedly connected to the upper surface of the turntable 56. An eccentric rod 59 is fixedly connected to the lower surface of the turntable 56. A straight groove that mates with the eccentric rod 59 is opened on the second filter plate 53. A hole that mates with the spiral rod 57 is opened inside the third piston rod 55, and a slider 58 is fixedly connected inside the hole. The slider 58 is slidably connected to the spiral groove on the side wall of the spiral rod 57.

[0054] Both the second piston cylinder 38 and the third piston cylinder 54 are filled with hydraulic oil. When the rectangular box 34 slides towards the second piston cylinder 38, it can compress the second piston rod 39. At this time, the hydraulic oil in the second piston cylinder 38 moves to the third piston cylinder 54 through the pipe 541. The third piston rod 55 in the third piston cylinder 54 slides axially downward. The third piston rod 55 slides in the third piston cylinder 54 through a key connection, so the third piston rod 55 will not rotate relative to the third piston cylinder 54. Meanwhile, the turntable 56 slides on the outer wall of the rectangular frame 51, limiting its movement. A connecting seat is provided on the wall for the turntable 56 to rotate and connect, so that the turntable 56 will not move axially. As the third piston rod 55 slides, the slider 58 inside the third piston cylinder 54 can slide relative to the spiral groove on the side wall of the spiral rod 57, so that the spiral rod 57 can drive the turntable 56 to rotate. At this time, the eccentric rod 59 on the lower surface of the turntable 56 slides back and forth in the straight groove on the second filter plate 53, while the second filter plate 53 is limited by the rectangular frame 51. Thus, the second filter plate 53 can slide back and forth linearly within the rectangular frame 51, so that the metal powder is screened.

[0055] A retaining ring 341 is fixedly connected to the side wall of the rectangular box 34, and a retaining groove that mates with the retaining ring 341 is provided on the end side wall of the second piston rod 39.

[0056] When the rectangular box 34 moves toward the second piston rod 39, the retaining ring 341 on the side wall of the rectangular box 34 can deform and engage in the groove at the end of the second piston rod 39. Then, when the rectangular box 34 moves away from the second piston cylinder 38, the retaining ring 341 can drive the second piston rod 39 out of the second piston cylinder 38, causing the third piston rod 55 to slide into the third piston cylinder 54 again, thereby causing the second filter plate 53 to slide back and forth again. As the rectangular box 34 continues to move away from the retaining ring 341, it can deform again and disengage from the second piston rod 39, thereby ensuring that the sliding of the rectangular box 34 is not interfered with.

[0057] Working principle: This powder forming hydraulic press uses an upper mold mounted on the lower surface of a pressure plate 14. A cavity is formed on the pressure base 12, and an ejector pin is located in the center of the base 1 to eject the product from the cavity. Metal powder is injected into the cavity. The first hydraulic rod 16 moves, causing the pressure plate 14 to move downwards. At this time, the upper mold at the bottom of the pressure plate 14 extrudes and forms the metal powder in the cavity. Subsequently, the four second hydraulic rods 11 retract, bringing the pressure base 12 closer to the base 1. The ejector pin on the base 1 then ejects the product from the cavity of the pressure base 12. The column 17 provides support for the entire device and supports the pressure base. The movement of 12 and pressure plate 14 is limited. The cylinders 2 on pressure base 12 and pressure plate 14 are filled with lubricating oil. When pressure base 12 and pressure plate 14 slide along column 17, the lubricating oil in cylinder 2 is passively coated on column 17 to lubricate the connection between column 17 and pressure base 12 and pressure plate 14, preventing column 17 from being burned by long-term friction. The travel of pressure plate 14 is large, so the lubricating oil in the upper cylinder 2 is consumed faster. The lubricating oil coated on the upper part of column 17 can drip into the lower cylinder 2 due to gravity, resulting in a larger amount of lubricating oil in the lower cylinder 2.

[0058] When the pressure plate 14 approaches the pressure seat 12, the first piston rod 24 in the first piston cylinder 21 inside the upper cylinder 2 can contact and be squeezed against the bottom wall of the lower cylinder 2. At this time, the first piston rod 24 is squeezed and slides upward. At the same time, the oil extraction pipe 25 is affected by the gravity of the counterweight ball 28 and falls vertically downward, thus ensuring that the lower end of the oil extraction pipe 25 can enter the lower cylinder 2. Then, the first piston rod 24 drives the piston plate 23 to slide into the first piston cylinder 21. The negative pressure generated in the first piston cylinder 21 causes the lubricating oil in the lower cylinder 2 to be drawn into the first piston cylinder 21 through the oil extraction pipe 25. When the two move away from each other, the elastic force of the first spring 22 causes the piston plate 23 to slide down. The lubricating oil drawn into the first piston cylinder 21 is squeezed and discharged into the upper cylinder 2, improving the utilization rate of lubricating oil and preventing excessive lubricating oil from accumulating in the bottom cylinder 2 and overflowing.

[0059] When the third hydraulic rod 31 is activated and extends, it can drive the rectangular box 34 to slide on the upper surface of the pressure seat 12. When the rectangular box 34 slides to the cavity position on the pressure seat 12, the metal powder inside the rectangular box 34 can enter the cavity of the pressure seat 12 to complete the material replenishment. The first box 33 is used for the transfer and temporary storage of metal powder. When the third hydraulic rod 31 moves towards the first box 33, it can push the L-shaped plate 37. And because the lower surface of the first box 33 is slidably connected to the upper surface of the rectangular box 34... Then, when the L-shaped plate 37 is pushed, the metal powder in the first box 33 can enter the rectangular box 34 to replenish the rectangular box 34 in preparation for the next extrusion molding. The sliding rod 35 limits the sliding of the L-shaped plate 37. When the rectangular box 34 moves away from the first box 33, the L-shaped plate 37 is pushed to the lower part of the first box 33 by the action of the second spring 36, so that the lower port of the first box 33 is blocked, thereby preventing the metal powder in the first box 33 from leaking and being wasted.

[0060] The second box 5 is used to store metal powder, and the height of the second box 5 is higher than that of the first box 33. As a result, the feeding pipe 331 between the first box 33 and the second box 5 is in an upward state, so that the metal powder in the second box 5 can slide down the feeding pipe 331 into the first box 33 to complete the replenishment of the first box 33.

[0061] After the product is extruded and pushed out, the fourth hydraulic rod 41 operates. At this time, the push block 42 at the output end of the fourth hydraulic rod 41 moves toward the product and pushes the product away from the pressure seat 12. After the product is pushed away from the pressure seat 12, the fourth hydraulic rod 41 retracts and the push block 42 is driven back to its original position.

[0062] When the pressure plate 14 moves toward the pressure seat 12 and extrudes the powder in the middle cavity of the pressure seat 12, the side wall of the pressure plate 14 can fit against the inner wall of the frame 13. When the pressure plate 14 fits against the inner wall of the frame 13, the frame 13 can limit the pressure plate 14, thereby restricting the position of the pressure plate 14 when it is being extruded and molded by the force of the first hydraulic rod 16. This prevents the pressure plate 14 from tilting against the column 17 after being subjected to force, which could cause the column 17 to bend or burn. The notch on the frame 13 prevents the movement of the rectangular box 34 and the push block 42 from being affected. When the rectangular box 34 feeds material into the cavity in the middle of the pressure seat 12, it is unavoidable that a small amount of metal powder will leak onto the upper surface of the pressure seat 12. At this time, the lifting pump 45 is started. Since the absorption pipe 44 on the lifting pump 45 is connected to the absorption cover 43, and the absorption cover 43 is located at the lower part of the push block 42, the absorption cover 43 can absorb most of the metal powder on the upper surface of the pressure seat 12 when it moves with the push block 42. The absorbed metal powder moves through the absorption pipe 44 to the discharge cover 46 and is discharged into the second box 5 at the bottom, thereby improving the utilization rate of the metal powder.

[0063] When the rectangular box 34 moves toward the second piston rod 39, the retaining ring 341 on the side wall of the rectangular box 34 can deform and engage in the groove at the end of the second piston rod 39. Then, when the rectangular box 34 moves away from the second piston cylinder 38, the retaining ring 341 can drive the second piston rod 39 out of the second piston cylinder 38, so that the third piston rod 55 slides into the third piston cylinder 54 again, and the second filter plate 53 slides back and forth again. As the rectangular box 34 continues to move away from the retaining ring 341, it can deform again and disengage from the second piston rod 39, so that the sliding of the rectangular box 34 is not interfered with.

[0064] Both the second piston cylinder 38 and the third piston cylinder 54 are filled with hydraulic oil. When the rectangular box 34 slides towards the second piston cylinder 38, it can compress the second piston rod 39. At this time, the hydraulic oil in the second piston cylinder 38 moves to the third piston cylinder 54 through the pipe 541. The third piston rod 55 in the third piston cylinder 54 slides axially downward. The third piston rod 55 slides in the third piston cylinder 54 through a key connection, so the third piston rod 55 will not rotate relative to the third piston cylinder 54. Meanwhile, the turntable 56 slides on the outer wall of the rectangular frame 51, limiting its movement. A connecting seat is provided on the wall for the turntable 56 to rotate and connect, so that the turntable 56 will not move axially. As the third piston rod 55 slides, the slider 58 inside the third piston cylinder 54 can slide relative to the spiral groove on the side wall of the spiral rod 57, so that the spiral rod 57 can drive the turntable 56 to rotate. At this time, the eccentric rod 59 on the lower surface of the turntable 56 slides back and forth in the straight groove on the second filter plate 53, while the second filter plate 53 is limited by the rectangular frame 51. Thus, the second filter plate 53 can slide back and forth linearly in the rectangular frame 51, so that the metal powder is screened.

[0065] The second filter plate 53 is located at the lower part of the discharge hood 46, so that the metal powder discharged through the discharge hood 46 can fall onto the upper part of the second filter plate 53. When the second filter plate 53 slides relative to the rectangular frame 51, the metal powder collected on its upper part can be shaken. At this time, the metal powder is sieved and leaks to the upper part of the first filter plate 52. The inner diameter of the filter holes on the second filter plate 53 is larger than that of the first filter plate 52, and there is a gap between the two. This allows the metal powder that may clump to be squeezed and rubbed into finer particles. The fined metal powder enters the second housing 5 through the first filter plate 52.

[0066] Although embodiments of the invention 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A powder forming hydraulic press, comprising a base (1), a pressure seat (12), a pressure plate (14), a top seat (15), and a first hydraulic rod (16), wherein the first hydraulic rod (16) is fixedly connected to the middle of the top seat (15), the pressure plate (14) is fixedly connected to the output end of the first hydraulic rod (16), four second hydraulic rods (11) are fixedly connected to the four corners of the base (1) and are fixedly connected to the pressure seat (12) through the four second hydraulic rods (11), a column (17) is fixedly connected between the top seat (15) and the base (1), and through holes that cooperate with the column (17) are provided on the pressure seat (12) and the pressure plate (14), characterized in that: The upper surfaces of the pressure plate (14) and the pressure seat (12) are both fixedly connected to a cylinder (2) for holding lubricating oil. The cylinder (2) and the column (17) are located on the same axis. A first piston cylinder (21) is fixedly connected inside the upper cylinder (2). A piston plate (23) is slidably connected inside the first piston cylinder (21). A first spring (22) is fixedly connected between the piston plate (23) and the top wall inside the first piston cylinder (21). The lower surface of the piston plate (23) A first piston rod (24) is fixedly connected. The cylinder (2) located at the bottom intermittently abuts against the first piston rod (24). An oil sucker pipe (25) and an oil drain pipe (26) are fixedly connected to both sides of the lower part of the piston plate (23). A one-way valve (27) is provided on both the oil sucker pipe (25) and the oil drain pipe (26). A counterweight ball (28) is fixedly connected to the bottom of the oil sucker pipe (25). A hole is opened on the pressure plate (14) to cooperate with the oil sucker pipe (25) and the first piston rod (24). The side of the pressure seat (12) is fixedly connected to a first bracket (3), and a rectangular box (34) for feeding material to the mold on the pressure seat (12) is slidably connected on the first bracket (3). A third hydraulic rod (31) is fixedly connected between the rectangular box (34) and the first bracket (3). The first bracket (3) is fixedly connected to two sides of the mounting frame (32), and the mounting frame (32) is fixedly connected to the middle of the first box (33) for transferring metal powder. The bottom of the first box (33) is slidably connected to the upper surface of the rectangular box (34), and the rectangular box (34) is intermittently connected to the first box (33). A sliding rod (35) is fixedly connected between the first bracket (3) and the first box (33). An L-shaped plate (37) for controlling the material feeding of the first box (33) is slidably connected on the sliding rod (35). A second spring (36) is sleeved on the sliding rod (35). The two ends of the second spring (36) are fixedly connected to the L-shaped plate (37) and the first bracket (3) respectively. The rectangular box (34) and the L-shaped plate (37) intermittently abut against each other. The top of the first box (33) is fixedly connected to a feeding pipe (331), and the end of the feeding pipe (331) away from the first box (33) is fixedly connected to a second box (5) for holding metal powder. The second box (5) is placed on the ground, and the height of the second box (5) is higher than that of the first box (33). A rectangular frame (51) is installed on the top of the second housing (5). A first filter plate (52) is fixedly connected to the lower part of the rectangular frame (51). A second filter plate (53) is slidably connected to the middle part of the rectangular frame (51). There is a gap between the second filter plate (53) and the first filter plate (52). The inner diameter of the filter holes on the second filter plate (53) is larger than that of the first filter plate (52), and there is a gap between them. This allows the agglomerated metal powder to be squeezed and rubbed to refine it. The refined metal powder enters the second housing (5) through the first filter plate (52).

2. The powder forming hydraulic press according to claim 1, characterized in that: A second support (4) is fixedly connected to the side of the pressure seat (12) near the first support (3). A push block (42) for ejecting the molded product is slidably connected to the second support (4). A fourth hydraulic rod (41) is fixedly connected to the second support (4). The output end of the fourth hydraulic rod (41) is fixedly connected to the push block (42).

3. A powder forming hydraulic press according to claim 2, characterized in that: The upper surface of the pressure seat (12) is fixedly connected to a frame (13) for limiting the pressure plate (14), and the frame (13) is provided with a notch for the rectangular box (34) and the push block (42) to move.

4. A powder forming hydraulic press according to claim 3, characterized in that: The bottom of the push block (42) is fixedly connected to an absorption cover (43), which is attached to the upper surface of the pressure seat (12). A lifting pump (45) is fixedly connected to the outer wall of the second box (5). An absorption pipe (44) is installed on the lifting pump (45). One end of the absorption pipe (44) is connected to the absorption cover (43), and the other end of the absorption pipe (44) is fixedly connected to a discharge cover (46). The discharge cover (46) is located directly above the second box (5), and the second filter plate (53) is located below the discharge cover (46).

5. A powder forming hydraulic press according to claim 4, characterized in that: A second piston cylinder (38) is fixedly connected to the middle of the first bracket (3), and a second piston rod (39) is slidably connected inside the second piston cylinder (38). The rectangular box (34) intermittently abuts against the second piston rod (39). A third piston cylinder (54) is fixedly connected to the outer wall of the rectangular frame (51). A pipe (541) is fixedly connected between the second piston cylinder (38) and the third piston cylinder (54). A third piston rod (55) is slidably connected inside the third piston cylinder (54). The rectangular box (34) is fixedly connected to the second piston rod (38). The outer wall of the frame (51) is rotatably connected to a turntable (56). A screw rod (57) is fixedly connected to the upper surface of the turntable (56), and an eccentric rod (59) is fixedly connected to the lower surface of the turntable (56). A straight groove that cooperates with the eccentric rod (59) is opened on the second filter plate (53). A hole that cooperates with the screw rod (57) is opened in the third piston rod (55), and a slider (58) is fixedly connected in the hole. The slider (58) is slidably connected in the spiral groove on the side wall of the screw rod (57).

6. A powder forming hydraulic press according to claim 5, characterized in that: A retaining ring (341) is fixedly connected to the side wall of the rectangular box (34), and a retaining groove that cooperates with the retaining ring (341) is provided on the end side wall of the second piston rod (39).

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