Powder metallurgy two-way pressing floating die frame forming equipment

Abstract

The invention relates to the technical field of intelligent manufacturing equipment, in particular to powder metallurgy two-way pressing floating die frame forming equipment which comprises an upper die frame, a lower die frame, a die cavity, a telescopic mechanism and a control case and further comprises a feeding bin, a driving shaft, a uniform mixing assembly and a discharging assembly. Powder in the feeding bin is stirred through the uniform mixing assembly, so that large and small particles in the powder are uniformly distributed, the density uniformity of a pressed blank is further ensured, and raw materials are continuously fed into the discharging assembly through the driving shaft in the stage of inputting the raw materials into the mold cavity; and then the discharging assembly in the rotating state is used for providing a certain centrifugal force when the raw materials enter the die cavity, so that the raw materials can be fully and evenly scattered in holes of the die cavity, the discharging assembly is used for smoothing the raw materials in the die cavity, and then the quality of pressed blanks is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent manufacturing equipment, and particularly to a powder metallurgy two-way pressing floating die carrier forming device. Background Art

[0002] The powder metallurgy two-way pressing floating die carrier forming device is an advanced forming technology that uses a floating female die mechanism to achieve up-and-down two-way pressurization. Its core structure includes components such as an upper punch, a lower punch, a floating female die, a spring or hydraulic support system, and a demolding mechanism. Among them, the female die is in a "floating" state supported by a spring or a cylinder, the lower punch is in a fixed state, and the upper punch applies pressure downward through mechanical drive. During the pressing process, the floating characteristic of the female die enables it to adjust its movement trajectory according to the dynamic change of the friction force between the powder and the die wall, thereby realizing the balanced transmission of the up-and-down two-way pressing force. In the initial stage of pressing, the upper punch presses downward, and the friction force between the powder and the inner wall of the female die is less than the spring support force. Only the upper punch moves downward to compress the powder. When the powder is compressed until the friction force exceeds the spring support force, the female die and the upper punch move downward synchronously, and at this time, the lower punch remains stationary, forming an up-and-down two-way pressurization effect. Compared with traditional single-way pressing equipment, this technology is significantly effective in improving the uniformity of the axial density distribution of the green compact, and is particularly suitable for forming parts with a large height-to-diameter ratio or a complex cross-sectional shape.

[0003] Currently, common problems in powder metallurgy pressing equipment include the "funnel effect" caused by unilateral feeding, filling dead corners caused by unreasonable die cavity design, and uneven density distribution of the green compact. These problems will directly affect the quality of the green compact and then affect the performance of the final product. For example, during unilateral feeding, the powder only flows into the die cavity along a fixed path, resulting in insufficient filling in the edge area, and powder segregation and layering will also occur due to the asymmetric path, causing coarse particles to gather at the far end and fine particles to remain at the proximal end, thus resulting in density differences in the green compact; when the die cavity is narrow and deep, has a multi-step structure, or has sharp corners on the inner wall, the powder is difficult to fill into the corner areas due to the influence of friction, forming "filling dead corners". These factors will all cause density gradients in the green compact, thereby affecting the mechanical properties and microstructural uniformity of the product after sintering.

[0004] Therefore, a powder metallurgy two-way pressing floating die carrier forming device is proposed. Summary of the Invention

[0005] The object of the present invention is to provide a powder metallurgy two-way pressing floating die carrier forming device, which solves the problem that the powder is incompletely filled or unevenly filled in the die cavity, resulting in a density gradient in the green compact, thereby affecting the mechanical properties and the uniformity of the microstructure of the product after sintering. By rotating the drive shaft, the mixing component stirs the powder in the feeding bin, and after the feeding bin moves to the designated position, it descends and separates from the mixing component, and engages with the blanking component, so that a relative displacement is generated between it and the mixing component, enabling the raw material to enter the blanking component through the drive shaft, and driving the blanking component to evenly sprinkle the powder into the pores of the die cavity by rotating the drive shaft, while leveling the powder.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A powder metallurgy two-way pressing floating die carrier forming device, including an upper die carrier, a lower die carrier, a die cavity, a telescopic mechanism and a control chassis, further including a feeding bin, a drive shaft, a mixing component and a blanking component. The feeding bin is located above the lower die carrier and is connected to the telescopic mechanism. The side wall of the feeding bin is provided with a feeding port. The drive shaft is arranged in the feeding bin and is connected to the control chassis. The mixing component is connected to the feeding bin. The blanking component is connected to the feeding bin and is located below the mixing component. The control chassis drives the mixing component to rotate through the drive shaft. When the feeding bin moves to the designated position, the drive shaft drives the blanking component to move down into the die cavity. At the same time, the powder in the feeding bin enters the blanking component through the drive shaft and is scattered into the die cavity through the blanking component.

[0008] Since the powder raw material is prone to the situation that large particles gather in the lower layer and small particles gather in the upper layer after being stored for a long time, and if such unevenly distributed powder raw material is directly pressed, it is easy to cause uneven density in the pressed green compact. Through the above solution, in the stage when the raw material is not injected into the die cavity, the mixing component stirs the raw material in the feeding bin to make the large and small particles evenly distributed therein, thereby ensuring the density uniformity of the green compact. When the feeding bin moves to the designated position, the control chassis causes the drive shaft to separate from the mixing component and continue to move down to engage with the blanking component. By rotating the drive shaft, raw material is continuously fed into the blanking component, and then the rotating blanking component provides a certain force and speed for the raw material when it enters the die cavity, enabling it to fully and evenly sprinkle into the pores of the die cavity, and using the blanking component to level the raw material in the die cavity to ensure the quality of the pressed green compact.

[0009] Preferably, the inside of the drive shaft is of a hollow structure. The upper side of the drive shaft is provided with a feed inlet, and the lower side of the drive shaft is provided with a discharge outlet.

[0010] Through the above solution, in the initial stage when the drive shaft does not move downward, the height of the feed inlet is above the feeding port. At this time, the raw materials in the feeding bin are lower than the height of the feeding port, so the raw materials will not enter the cavity inside the drive shaft through the feed inlet. When the drive shaft moves downward, its feed inlet is immersed in the powder raw materials. As the drive shaft rotates, the powder raw materials in the feeding bin will continuously enter the inside of the drive shaft and be discharged from the discharge port at the bottom.

[0011] Preferably, a clamping block is connected to the lower side of the drive shaft, and a chamfer is provided at the edge of the clamping block. The mixing assembly includes a rotating seat, a stirring roller and a first clamping groove. The rotating seat is connected to the feeding bin. The upper surface of the rotating seat is an inclined surface. The stirring roller is connected to the inclined surface of the rotating seat. The first clamping groove is opened at the bottom of the rotating seat, and the width of the first clamping groove is greater than the width of the clamping block.

[0012] Through the above solution, the inclined upper surface of the rotating seat can make the raw materials inside the feeding bin gather towards the middle, thus facilitating the feeding process after the drive shaft moves downward. The drive shaft drives the rotating seat to rotate together through the cooperation of the clamping block and the first clamping groove, so as to use the stirring roller to stir and mix the raw materials inside the feeding bin. The width of the first clamping groove being greater than the width of the clamping block enables the clamping block to more easily return to the first clamping groove during the reset process after separation from it.

[0013] Preferably, a plurality of rolling balls are connected to the clamping block, and the rolling balls are evenly distributed on the upper and lower sides of the clamping block.

[0014] Through the above solution, when the clamping block moves upward from the bottom, its position is likely to be misaligned with the first clamping groove and cannot be directly clamped. At this time, if the clamping block directly contacts the bottom of the rotating seat, the corresponding parts are easily damaged. Therefore, the sliding friction is changed to rolling friction through the rolling balls, thereby reducing the friction between the two and ensuring the service life of the parts.

[0015] Preferably, multiple groups of stirring rollers are provided according to different diameter ranges, and the innermost stirring roller is arranged close to the drive shaft.

[0016] Through the above solution, the cooperation of multiple groups of stirring rollers can play a better role in stirring the powder in the feeding bin. In addition, the innermost stirring roller can, during the process of the drive shaft moving downward for feeding, use the relative movement between the stirring roller and the drive shaft to push the nearby raw materials into the feed inlet, thereby making the feeding process smoother.

[0017] Preferably, an installation cavity is further formed in the feeding bin; the blanking assembly includes a material tray, a second card slot, a slide rail, a slider, a connecting rod, a limiting plate and a return spring. The connecting rod and the limiting plate are both arranged in the installation cavity. The return spring is sleeved on the connecting rod, and its two ends are respectively connected with the inner wall of the installation cavity and the limiting plate. The slider is a sphere and is rotatably connected to the bottom of the connecting rod. The material tray is connected with the slider through the slide rail formed on the upper surface. The second card slot is arranged on the upper side of the material tray.

[0018] Through the above scheme, when the driving shaft moves downward, it will be engaged with the second card slot through the clamping block. On the one hand, it will continue to drive the material tray to move downward and enter the mold cavity, thus avoiding waste caused by raw materials spilling outside the mold cavity. At the same time, the way of the material tray entering the mold cavity for blanking can avoid the powder splashing after falling from a high place and affecting the raw material filling. On the other hand, the driving shaft will also drive the material tray to rotate, so as to use the centrifugal force to throw the raw materials out, so that the raw materials can fully and evenly fill the pores inside the mold cavity, thus avoiding the "filling dead angle".

[0019] Preferably, the second card slot cooperates with the clamping block, and the width of the second card slot is greater than the width of the clamping block.

[0020] Through the above scheme, similar to the first card slot, the width of the second card slot being greater than the width of the clamping block enables the clamping block to return to the second card slot more easily during the reset process after being separated from it.

[0021] Preferably, the blanking assembly further includes an inner cavity, a blanking hole and a material spreading opening. The inner cavity is formed in the material tray and cooperates with the discharge port. The blanking hole is formed at the bottom of the inner cavity. The material spreading opening is formed on the side wall of the material tray, and both the blanking hole and the material spreading opening are communicated with the inner cavity.

[0022] Through the above scheme, the raw materials enter the inner cavity of the material tray from the discharge port of the driving shaft. Part of the raw materials are discharged from the blanking hole at the bottom and fill the main part in the mold cavity. The material spreading opening on the side wall can utilize the centrifugal force during the rotation of the material tray to a certain extent, so as to throw the raw materials into the pores at the edge of the mold cavity, thus avoiding the "filling dead angle".

[0023] Preferably, a scraping blade is connected to the bottom of the material tray, and the scraping blade is made of a flexible material.

[0024] Through the above scheme, since the powder depends on gravity for natural powder filling during the falling process, uneven situations such as accumulation peaks (thick in the middle and thin at the edges) are likely to occur. Therefore, the soft scraping blade can smooth the surface of the raw materials and avoid compacting them prematurely due to excessive pressure, ensuring the quality and density uniformity of the green compact.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. A powder metallurgy two-way pressing floating die carrier forming device of the present invention stirs the powder in the feeding bin through a mixing component, so that the large and small particles are evenly distributed therein, thereby ensuring the density uniformity of the compact, and continuously feeding the raw material into the feeding component through a driving shaft during the stage of inputting the raw material into the die cavity. Then, the rotating feeding component provides a certain centrifugal force for the raw material when it enters the die cavity, so that the raw material can fully and evenly cover the pores in the die cavity, and the feeding component is used to level the raw material in the die cavity, thereby ensuring the quality of the compact after pressing.

[0027] 2. A powder metallurgy two-way pressing floating die carrier forming device of the present invention is provided with a rotating seat and a stirring roller. The rotating shaft drives the stirring roller to continuously rotate, thereby stirring the powder raw material in the feeding bin, so that the large and small particles can be fully mixed, thereby ensuring the density uniformity of the subsequent pressed compact. At the same time, the inclined upper surface of the rotating seat makes the raw material in the feeding bin gather towards the middle, thereby facilitating the subsequent feeding into the driving shaft. The innermost stirring roller can also use its relative movement with the driving shaft to push the nearby raw material into the feeding port, thereby making the feeding process smoother.

[0028] 3. A powder metallurgy two-way pressing floating die carrier forming device of the present invention is provided with a tray. On the one hand, by making the tray enter the die cavity for feeding, it avoids the situation of raw material leakage outside the die cavity and waste, and can also prevent the powder from splashing after falling from a high place and affecting the raw material filling; on the other hand, it can use the centrifugal force during the rotation of the tray to make some raw materials fly out from the edge of the tray, so that the raw materials can fully and evenly cover the pores inside the die cavity, thereby ensuring the quality of the compact after forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0030] Figure 2 is a schematic structural diagram of the positional relationship among the driving shaft, the mixing component and the feeding component of the present invention;

[0031] Figure 3 is a schematic structural diagram of the driving shaft of the present invention;

[0032] Figure 4 is a schematic structural diagram of the mixing component of the present invention;

[0033] Figure 5 is of the present invention Figure 3 an enlarged view of part A in;

[0034] Figure 6 is a schematic structural diagram of the feeding component of the present invention;

[0035] Figure 7 is of the present inventionFigure 6 Enlarged view at B in the middle;

[0036] Figure 8 This is a schematic structural view of the inner cavity of the material tray of the present invention.

[0037] In the figure: 1. Upper die holder; 2. Lower die holder; 3. Mold cavity; 4. Telescopic mechanism; 5. Control chassis; 6. Feeding bin; 7. Driving shaft; 8. Mixing assembly; 801. Rotating seat; 802. Stirring roller; 803. First card slot; 9. Feeding component; 901. Material tray; 902. Second card slot; 903. Slide rail; 904. Slide block; 905. Connecting rod; 906. Limiting plate; 907. Return spring; 908. Inner cavity; 909. Feeding hole; 9010. Spreading opening; 9011. Scraping blade; 10. Feeding port; 11. Feed inlet; 12. Discharge outlet; 13. Clamping block; 14. Ball; 15. Installation cavity. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to Figures 1 to 8 , the present invention provides a powder metallurgy two-way pressing floating die holder forming device, and the technical solutions are as follows:

[0040] Specifically, please refer to Figure 1 , Figure 2 and Figure 3, A powder metallurgy two-way pressing floating die carrier forming device, comprising an upper die carrier 1, a lower die carrier 2, a die cavity 3, a telescopic mechanism 4 and a control chassis 5. The upper die carrier 1 and the lower die carrier 2 are both arranged on the corresponding pressing and forming equipment. The die cavity 3 is arranged in the lower die carrier 2. The edge of the die cavity 3 has pores with a small angle. The telescopic mechanism 4 is arranged on the upper side of the lower die carrier 2. It also includes a feeding bin 6, a driving shaft 7, a mixing assembly 8 and a feeding component 9. The control chassis 5 is connected to the upper side of the feeding bin 6 and is connected to the driving shaft 7. The driving shaft 7 always rotates an integer number of turns under the drive of the control chassis 5. The feeding bin 6 is located above the lower die carrier 2 and is connected to the telescopic mechanism 4. The position of the feeding bin 6 is changed through the telescopic mechanism 4. A feeding port 10 is arranged on the side wall of the feeding bin 6. Raw materials are input into the interior of the feeding bin 6 by connecting a pipeline to the feeding port 10. The driving shaft 7 is arranged in the feeding bin 6 and is connected to the control chassis 5. The rotation or lifting of the driving shaft 7 can be controlled through the control chassis 5. The mixing assembly 8 is connected to the feeding bin 6. In the stage when raw materials are not injected into the die cavity 3, the raw materials in the feeding bin 6 are stirred through the mixing assembly 8 to make the large and small particles evenly distributed therein, so as to ensure the density uniformity of the compact.

[0041] The interior of the driving shaft 7 is of a hollow structure and can accommodate the passage of powder raw materials. An inlet port 11 is opened on the upper side of the driving shaft 7. In the initial stage when the driving shaft 7 does not move downward, the height of the inlet port 11 is above the feeding port 10. At this time, the raw materials in the feeding bin 6 will be lower than the height of the feeding port 10. Therefore, the raw materials will not enter the cavity inside the driving shaft 7 through the inlet port 11 at this time. An outlet port 12 is opened on the lower side of the driving shaft 7. When the feeding bin 6 moves to the specified position, the driving shaft 7 is separated from the mixing assembly 8 and continues to move downward to engage with the feeding component 9 through the control chassis 5. After the driving shaft 7 moves downward, its inlet port 11 is immersed in the powder raw materials. As the driving shaft 7 rotates, the powder raw materials in the feeding bin 6 will continuously enter the interior of the driving shaft 7 and be discharged from the outlet port 12 at the bottom.

[0042] The feeding component 9 is connected to the feeding bin 6 and is located below the mixing assembly 8. The driving shaft 7 drives the feeding component 9 to rotate, so as to provide a centrifugal force when the raw materials enter the die cavity 3, enabling them to fully and evenly cover the pores in the die cavity 3, and using the feeding component 9 to smooth the raw materials in the die cavity 3 to ensure the quality of the compact after pressing.

[0043] As an implementation manner of the present invention, refer to Figure 3 、 Figure 4 and Figure 5, the mixing component 8 includes a rotating base 801, a stirring roller 802 and a first clamping groove 803. The rotating base 801 is connected to the feeding bin 6. The upper surface of the rotating base 801 is an inclined surface, which can make the raw materials inside the feeding bin 6 gather towards the middle, thus facilitating the feeding process after the driving shaft 7 moves downward; the stirring roller 802 is connected above the rotating base 801. The stirring roller 802 is provided with multiple groups according to different diameter ranges, so that it can better stir the powder in the feeding bin 6. And the innermost stirring roller 802 is arranged close to the driving shaft 7. Therefore, the innermost stirring roller 802 can use the relative movement between the stirring roller 802 and the driving shaft 7 to push the nearby raw materials into the feeding port 11 during the process of the driving shaft 7 moving downward for feeding, so as to make the feeding process smoother;

[0044] A clamping block 13 is also connected to the lower side of the driving shaft 7. The edge of the clamping block 13 is provided with a chamfer, which can make it more convenient to enter the first clamping groove 803; a plurality of balls 14 are connected to the clamping block 13. The balls 14 are evenly distributed on the upper and lower sides of the clamping block 13. By changing the sliding friction to rolling friction through the balls 14, the friction between the two is reduced, ensuring the service life of the parts; the first clamping groove 803 is opened at the bottom of the rotating base 801. The driving shaft 7 drives the rotating base 801 to rotate together through the cooperation of the clamping block 13 and the first clamping groove 803, so as to stir and mix the raw materials inside the feeding bin 6 by using the stirring roller 802. And the width of the first clamping groove 803 is greater than the width of the clamping block 13. Therefore, when the clamping block 13 returns after separating from it, it can return to the first clamping groove 803 more easily.

[0045] As an implementation manner of the present invention, referring to Figure 6 , Figure 7 and Figure 8 , an installation cavity 15 is also opened in the feeding bin 6. The installation cavity 15 is similar in shape to two upper and lower cylindrical cavities. The diameter of the upper cylindrical cavity is larger than that of the lower cylindrical cavity; the feeding component 9 includes a tray 901, a second clamping groove 902, a slide rail 903, a slider 904, a connecting rod 905, a limiting plate 906 and a return spring 907. The connecting rod 905 and the limiting plate 906 are both arranged in the installation cavity 15. The return spring 907 is sleeved on the connecting rod 905, and its two ends are respectively connected to the inner wall of the installation cavity 15 and the limiting plate 906. The slider 904 is a sphere and is rotatably connected to the bottom of the connecting rod 905. The tray 901 is connected to the slider 904 through the slide rail 903. When the tray 901 rotates, the slide rail 903 moves relative to the slider 904;

[0046] The second card slot 902 is arranged on the upper side of the material tray 901. After the driving shaft 7 moves downward, it will be engaged with the second card slot 902 through the card block 13, which can not only drive the material tray 901 to move downward and enter the mold cavity 3, but also drive the material tray 901 to rotate, so as to use centrifugal force to throw the raw materials out, so that the raw materials can fully and evenly cover the pores inside the mold cavity 3, thus avoiding "filling dead corners"; the second card slot 902 cooperates with the card block 13, and the width of the second card slot 902 is greater than the width of the card block 13, which enables the card block 13 to return to the second card slot 902 more easily during the reset process after separating from it;

[0047] The feeding assembly 9 further includes an inner cavity 908, a feeding hole 909 and a material spreading port 9010. The inner cavity 908 is opened on the material tray 901 and cooperates with the discharge port 12. The feeding hole 909 is opened at the bottom of the inner cavity 908. The material spreading port 9010 is opened on the side wall of the material tray 901, and both the feeding hole 909 and the material spreading port 9010 are communicated with the inner cavity 908. The raw materials enter the inner cavity 908 of the material tray 901 from the discharge port 12 of the driving shaft 7. Part of the raw materials are discharged from the feeding hole 909 at the bottom and fill the main part in the mold cavity 3, while the material spreading port 9010 on the side wall can utilize the centrifugal force during the rotation of the material tray 901 to a certain extent, so as to throw the raw materials into the pores at the edge of the mold cavity 3; a scraping blade 9011 is connected to the bottom of the material tray 901. The scraping blade 9011 is made of polytetrafluoroethylene, which is a flexible material with extremely low friction coefficient and excellent chemical stability and has anti-adhesion performance, so that metal powder is not easily adhered to the surface of the scraping blade 9011. Therefore, the soft scraping blade 9011 can smooth the surface of the raw materials and avoid compressing them in advance due to excessive pressure, ensuring the quality and density uniformity of the green compact.

[0048] The specific working principle is as follows: in order to avoid the problem that the distribution of large and small particles of the powder raw materials is uneven after long-term storage, which affects the density uniformity and quality of the green compact, in this solution, the driving shaft 7 drives the mixing assembly 8 to stir the powder in the feeding bin 6, so as to ensure its uniformity when entering the mold cavity 3. At the same time, the mixing assembly 8 is used to assist the raw materials to enter the driving shaft 7 during material transportation;

[0049] Specifically, first, the raw materials are sent from the feeding port 10 to the feeding bin 6 through an external pipeline, and the powder height in the feeding bin 6 is always kept level with or below the feeding port 10; at the same time, the control chassis 5 prompts the drive shaft 7 to rotate. At this time, the feeding port 11 of the drive shaft 7 is higher than the height where the feeding port 10 is located. Therefore, the raw materials in the feeding bin 6 will not enter the drive shaft 7. And because the clamping block 13 of the drive shaft 7 is engaged with the first slot 803 of the rotating seat 801 at this time, the drive shaft 7 can drive the rotating seat 801 to rotate synchronously, so as to stir the raw materials in the feeding bin 6 by using the multi-layer stirring rollers 802 above the rotating seat 801, thereby making the large and small particles in it fully mixed, and then ensuring the uniformity of the density of the raw materials entering the mold cavity 3 this time;

[0050] When the feeding bin 6 moves to the designated position, the control chassis 5 controls the drive shaft 7 to stop rotating and move downward. When the drive shaft 7 moves below the feeding port 10, at this time the clamping block 13 is separated from the first slot 803, and at the same time the lower end of the clamping block 13 is inserted into the second slot 902 and then continues to rotate. During the downward movement of the drive shaft 7, the feeding port 11 will also be immersed in the powder raw materials. At this time, the raw materials will enter the cavity inside the drive shaft 7 from the feeding port 11. At the same time, because the innermost stirring roller 802 is arranged close to the drive shaft 7, it can use the relative movement between the stirring roller 802 and the drive shaft 7 to push the nearby raw materials into the feeding port 11 during the feeding process of the drive shaft 7, so as to make the feeding process smoother; and the drive shaft 7 continues to rotate during the downward movement. When the clamping block 13 on the lower side of the drive shaft 7 rotates to a position corresponding to the second slot 902, the drive shaft 7 moves downward and makes the clamping block 13 engaged with the second slot 902 on the material tray 901. At this time, the discharge port 12 of the drive shaft 7 is communicated with the inner cavity 908 of the material tray 901, so that the raw materials in the drive shaft 7 can be thrown into the inner cavity 908 under the action of centrifugal force and enter the mold cavity 3 from the blanking hole 909 or the spreading port 9010.

[0051] In order to avoid the problem that the powder cannot be fully filled when facing the mold cavity 3 with features such as corner pores, this solution drives the feeding component 9 to rotate through the drive shaft 7, so that part of the raw materials can be thrown into the pores at the edge of the mold cavity 3 under the action of centrifugal force, so as to ensure that the mold cavity 3 can be fully filled with powder raw materials; specifically, after the raw materials enter the inner cavity 908, they will be discharged from the blanking hole 909 opened on the lower side of the inner cavity 908 and accumulate on the main body part of the mold cavity 3. At the same time, during the rotation of the material tray 901, the scraping blade 9011 located on the lower side of the material tray 901 can continuously smooth the accumulated powder raw materials, so as to facilitate the subsequent pressing process; and part of the raw materials are thrown to the edge of the mold cavity 3 by the centrifugal force generated during the rotation of the material tray 901, that is, into the narrow corners or pores at the edge of the mold cavity 3, so that the raw materials can fully and evenly cover the pores inside the mold cavity 3, thus avoiding the "filling dead angle" and ensuring the quality after the green compact is formed.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder metallurgy two-way pressing floating die carrier forming device, comprising an upper die carrier (1), a lower die carrier (2), a die cavity (3), a telescopic mechanism (4) and a control chassis (5), characterized in that: It further includes a feeding bin (6), a drive shaft (7), a mixing assembly (8) and a blanking assembly (9). The feeding bin (6) is located above the lower die holder (2) and is connected to the telescopic mechanism (4). A feeding port (10) is provided on the side wall of the feeding bin (6). The drive shaft (7) is arranged in the feeding bin (6) and is connected to the control cabinet (5). The mixing assembly (8) is connected to the feeding bin (6), and the blanking assembly (9) is connected to the feeding bin (6) and is located below the mixing assembly (8). The control cabinet (5) drives the mixing assembly (8) to rotate through the drive shaft (7). When the feeding bin (6) moves to a specified position, the drive shaft (7) drives the blanking assembly (9) to move down into the die cavity (3). At the same time, the powder in the feeding bin (6) enters the blanking assembly (9) through the drive shaft (7) and is scattered into the die cavity (3) through the blanking assembly (9).

2. The powder metallurgy two-way pressing floating die carrier forming equipment according to claim 1, characterized in that: The inside of the drive shaft (7) is of a hollow structure. An inlet port (11) is provided on the upper side of the drive shaft (7), and an outlet port (12) is provided on the lower side of the drive shaft (7).

3. A powder metallurgy two-way pressing floating die carrier forming device according to claim 2, characterized in that: A clamping block (13) is connected to the lower side of the drive shaft (7), and a chamfer is provided on the edge of the clamping block (13). The mixing assembly (8) includes a rotating seat (801), stirring rollers (802) and a first slot (803). The rotating seat (801) is connected to the feeding bin (6). The upper surface of the rotating seat (801) is an inclined surface. The stirring rollers (802) are connected to the inclined surface of the rotating seat (801). The first slot (803) is opened at the bottom of the rotating seat (801), and the width of the first slot (803) is greater than the width of the clamping block (13).

4. A powder metallurgy two-way pressing floating die carrier forming device according to claim 3, characterized in that: A plurality of balls (14) are connected to the clamping block (13), and the balls (14) are evenly distributed on the upper and lower sides of the clamping block (13).

5. A powder metallurgy two-way pressing floating die carrier forming device according to claim 3, characterized in that: The stirring rollers (802) are provided in multiple groups according to different diameter ranges, and the innermost stirring rollers (802) are arranged close to the drive shaft (7).

6. A powder metallurgy two-way pressing floating die carrier forming device according to claim 3, characterized in that: An installation cavity (15) is further opened in the feeding bin (6). The blanking assembly (9) includes a tray (901), a second slot (902), a slide rail (903), a slider (904), a connecting rod (905), a limiting plate (906) and a return spring (907). The connecting rod (905) and the limiting plate (906) are both arranged in the installation cavity (15). The return spring (907) is sleeved on the connecting rod (905), and its two ends are respectively connected to the inner wall of the installation cavity (15) and the limiting plate (906). The slider (904) is a sphere and is rotatably connected to the bottom of the connecting rod (905). The tray (901) is connected to the slider (904) through the slide rail (903) opened on the upper surface. The second slot (902) is arranged on the upper side of the tray (901).

7. A powder metallurgy two-way pressing floating die carrier forming device according to claim 6, characterized in that: The second slot (902) cooperates with the clamping block (13), and the width of the second slot (902) is greater than the width of the clamping block (13).

8. A powder metallurgy two-way pressing floating die carrier forming device according to claim 6, characterized in that: The blanking component (9) further includes an inner cavity (908), a blanking hole (909), and a material spreading opening (9010). The inner cavity (908) is formed in the material tray (901) and is adapted to the discharge port (12). The blanking hole (909) is formed at the bottom of the inner cavity (908), and the material spreading opening (9010) is formed in the side wall of the material tray (901). Both the blanking hole (909) and the material spreading opening (9010) are in communication with the inner cavity (908).

9. The powder metallurgy two-way pressing floating die carrier forming equipment according to claim 6, characterized in that: A scraping blade (9011) is connected to the bottom of the material tray (901), and the scraping blade (9011) is made of a flexible material.

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