A vibration uniform powder distribution device for cold isostatic pressing powder
The cold isostatic pressing powder loading device, designed with a vibration mechanism and powder receiving plate, solved the problem of uniform powder distribution of multi-scale tungsten powder, and achieved the stability of the billet density and the improvement of material purity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINZHOU GREAT WALL TUNGSTEN & MOLYBDENUM CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-24
AI Technical Summary
Existing powder loading technology has poor adaptability to multi-scale tungsten powder, is prone to funnel effect, resulting in uneven density of the green body, and the use of additives may introduce impurities, affecting the purity of the material.
A vibration mechanism is used to drive the fixed cylinder and tungsten powder screen to vibrate at high frequency. Combined with the design of the powder receiving plate and the bottom of the screen, the uniform distribution of tungsten powder is achieved, eliminating the funnel effect and reducing the dependence on additives.
It achieves uniform distribution of tungsten powder, improves the consistency of the green body density, stably reaches ≥65% of the theoretical density, reduces the use of additives, and improves powder loading efficiency and material purity.
Smart Images
Figure CN224543126U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tungsten powder processing technology, specifically to a tungsten powder vibration uniform distribution device for cold isostatic pressing powder loading. Background Technology
[0002] In the cold isostatic pressing (COP) process of tungsten-based materials such as high-performance tungsten wire, doped tungsten powder, and wide-particle-size tungsten strips, powder uniformity is a core factor affecting the consistency of the green body density and subsequent sintering quality. Nanoscale or 1-2μm ultrafine tungsten powder is prone to agglomeration, while 6-10μm coarse particles tend to settle. Mixed powders are prone to component segregation during loading. The poor flowability of nanoparticles leads to fluctuations in the COP density during cold isostatic pressing, making it difficult to consistently achieve ≥65% of the theoretical density in the green body, necessitating the use of additives for compensation. The existing technology suffers from the following problems: Because existing powder loading technology relies on natural material discharge, it is not well adapted to multi-scale powders, such as wide ratios of 1μm+8μm, and is prone to forming a funnel effect, resulting in a density difference between the edge and center of the green body. At the same time, the wet process requires the addition of 1% starch granulation to enhance fluidity, but there is a risk of introducing impurities, which affects the purity of the final material. Utility Model Content
[0003] This invention provides a tungsten powder vibration uniform distribution device for cold isostatic pressing powder loading, in order to solve the problems mentioned in the background art.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A tungsten powder vibration uniform distribution device for cold isostatic pressing includes a vibration mechanism, a collection mechanism at the bottom of the vibration mechanism, a base plate at the bottom of the collection mechanism, a first electric push rod fixedly installed on the top rear side of the base plate, a fixed cylinder including a fixed cylinder, a vibration motor fixedly installed on the front side of the fixed cylinder, four threaded uprights fixedly installed in a ring array on the top of the fixed cylinder, an inner ring plate engaged with the inner ring of the fixed cylinder, a screen fixing ring fixedly installed on the outer wall of the inner ring plate, a tungsten powder screen fixedly installed on the inner ring of the inner ring plate, four through holes in the ring array of the screen fixing ring, and the screen fixing ring engaging with the four threaded uprights using the four through holes, a clamping ring above the screen fixing ring, and four mating holes in the ring array of the clamping ring, the four mating holes engaging with the four threaded uprights respectively, and internal thread caps threadedly installed on the top of each of the four threaded uprights, with the four internal thread caps located above the clamping ring.
[0005] A further improvement of this utility model is that: a retaining ring is fixedly connected to the bottom of the fixed cylinder, the collecting mechanism includes a tungsten powder collecting box, and an annular groove penetrating the top of the inner ring of the tungsten powder collecting box is provided, the retaining ring engages with the annular groove, and the inner ring of the retaining ring is vertically aligned with the inner ring of the fixed cylinder and the inner ring of the tungsten powder collecting box.
[0006] A further improvement of this utility model is that a second electric push rod is fixedly installed at the center of the bottom of the inner wall of the tungsten powder collecting box, and a powder receiving plate is fixedly installed at the output end of the second electric push rod. The side of the powder receiving plate is in contact with the inner ring of the fixed cylinder, and the upper surface of the powder receiving plate is in contact with the bottom of the tungsten powder screen.
[0007] A further improvement of this utility model is that: a limiting sealing ring is fixedly installed on the inner ring of the tungsten powder collecting box; when the powder receiving plate descends to the bottom, its bottom is in contact with the top of the limiting sealing ring, and its side is in contact with the inner ring of the tungsten powder collecting box; when the powder receiving plate descends to the bottom, its upper surface is lower than the bottom of the annular groove.
[0008] A further improvement of this utility model is that: a lifting plate is fixedly installed at the output end of the first electric push rod, the front end of the lifting plate is fixedly connected to the rear end of the fixed cylinder, a limiting slide rod is fixedly installed on the top rear side of the base plate, the limiting slide rod is located between the first electric push rod and the tungsten powder collection box, the lifting plate and the limiting slide rod are slidably connected, and an anti-detachment disc is fixedly installed at the top end of the limiting slide rod.
[0009] A further improvement of this utility model is that: handles for picking up and putting down are fixedly installed on both the left and right sides of the tungsten powder collection box; a cross-shaped slot is opened at the center of the bottom of the tungsten powder collection box; a cross-shaped card plate is fixedly installed on the front top of the base plate; and the cross-shaped card plate is engaged with the cross-shaped slot.
[0010] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: This invention provides a tungsten powder vibration uniform distribution device for cold isostatic pressing. The device uses a vibrating motor to drive a fixed cylinder and a tungsten powder screen to vibrate at high frequency, which fully disperses agglomerated nano- or micron-sized tungsten powder. At the same time, the design of the powder receiving plate and the bottom of the screen is used to temporarily store the powder during vibration, forcing the powder to spread horizontally instead of falling naturally. This eliminates the funnel effect of traditional powder loading, overcomes the segregation problem of multi-scale powder, significantly reduces the density difference between the edge and center of the billet, and ensures that the billet density is stable at ≥65% of the theoretical density, thus reducing the dependence on additives.
[0011] This invention provides a tungsten powder vibration uniform distribution device for cold isostatic pressing powder loading. Through the cooperation between the detachable tungsten powder screen, the tungsten powder collection box, and the powder receiving plate, the device completes the vibration powder distribution, dynamic screening, and sealed collection in a single operation, greatly improving the powder loading efficiency. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the vibration mechanism of the present invention. Figure 3 This is a schematic diagram of the collection mechanism of the present invention; Figure 4 This is a schematic diagram of the fixed cylinder in the raised state of the structure of this utility model; Figure 5 This is a schematic diagram showing the disassembled state of the tungsten powder collection box of this utility model.
[0013] In the diagram: 1. Vibration mechanism; 11. Fixed cylinder; 111. Snap ring; 12. Vibration motor; 13. Threaded upright; 14. Screen fixing ring; 15. Inner ring plate; 16. Tungsten powder screen; 17. Pressing ring; 18. Butt joint hole; 19. Internal threaded cap; 2. Collection mechanism; 21. Tungsten powder collection box; 211. Pick-up and drop handle; 212. Cross-shaped slot; 22. Second electric push rod; 23. Powder receiving plate; 24. Annular slot; 25. Limiting sealing ring; 3. Base plate; 31. Limiting slide rod; 32. Anti-detachment disc; 33. Cross-shaped clamping plate; 4. First electric push rod; 41. Lifting plate. Detailed Implementation
[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand Understood. The present invention will now be further described in conjunction with specific implementation methods.
[0015] like Figure 1 , Figure 2As shown, this utility model provides a tungsten powder vibration uniform distribution device for cold isostatic pressing powder loading, including a vibration mechanism 1, a collection mechanism 2 at the bottom of the vibration mechanism 1, a base plate 3 at the bottom of the collection mechanism 2, a first electric push rod 4 fixedly installed on the rear side of the top of the base plate 3, a fixed cylinder 11 including a fixed cylinder 11, a vibration motor 12 fixedly installed on the front side of the fixed cylinder 11, four threaded uprights 13 fixedly installed in a ring array on the top of the fixed cylinder 11, an inner ring plate 15 snapped into the inner ring of the fixed cylinder 11, and the outer wall of the inner ring plate 15 fixed. A screen fixing ring 14 is installed, and a tungsten powder screen 16 is fixedly installed on the inner ring plate 15. The screen fixing ring 14 has four through holes in a circular array, and the screen fixing ring 14 is engaged with four threaded uprights 13 through the four through holes. A clamping ring 17 is provided above the screen fixing ring 14. The clamping ring 17 has four mating holes 18 in a circular array, and the four mating holes 18 are engaged with the four threaded uprights 13 respectively. The top of each of the four threaded uprights 13 is threaded with an internal thread cap 19, and the four internal thread caps 19 are all located above the clamping ring 17. By pouring untreated tungsten powder into the inner ring plate 15, the vibration motor 12 on the front side of the fixed cylinder 11 can be started simultaneously to control the amount poured in. This causes the entire fixed cylinder 11 to drive the screen fixing ring 14, the inner ring plate 15, and the tungsten powder screen 16 to vibrate at high frequency, allowing the poured tungsten powder to spread out quickly and ensuring its height does not exceed that of the inner ring plate 15. To clean the tungsten powder screen 16 or to remove large particles of tungsten powder that have been screened, simply rotate and remove the four internal thread caps 19 to release the restriction on the clamping ring 17. The clamping ring 17 can be removed from the outer wall of the threaded upright 13. Then, the screen fixing ring 14, along with the inner ring plate 15 and the tungsten powder screen 16, can be disassembled to facilitate cleaning or collection of large tungsten powder particles. During installation, align the through hole of the screen fixing ring 14 with the threaded upright 13 and insert it. Then, align the clamping ring 17 with the mating hole 18 and insert it with the threaded upright 13. Finally, rotate and tighten the four internal thread caps 19 to the parts of the four threaded uprights 13 that extend out of the mating holes 18 to complete the installation of the tungsten powder screen 16.
[0016] like Figure 3As shown, a retaining ring 111 is fixedly connected to the bottom of the fixed cylinder 11. The collecting mechanism 2 includes a tungsten powder collecting box 21. An annular groove 24 penetrating the top of the inner ring of the tungsten powder collecting box 21 is provided. The retaining ring 111 engages with the annular groove 24, and the inner ring of the retaining ring 111 is vertically aligned with the inner rings of the fixed cylinder 11 and the tungsten powder collecting box 21. A second electric push rod 22 is fixedly installed at the center of the bottom of the inner wall of the tungsten powder collecting box 21. The second electric push rod 22... A powder receiving plate 23 is fixedly installed at the outlet end. The side of the powder receiving plate 23 is in contact with the inner ring of the fixed cylinder 11, and the upper surface of the powder receiving plate 23 is in contact with the bottom of the tungsten powder screen 16. A limit sealing ring 25 is fixedly installed on the inner ring of the tungsten powder collection box 21. When the powder receiving plate 23 descends to the bottom, its bottom is in contact with the top of the limit sealing ring 25, and its side is in contact with the inner ring of the tungsten powder collection box 21. When the powder receiving plate 23 descends to the bottom, its upper surface is lower than the bottom of the annular groove 24. During use, the powder receiving plate 23 rises to its highest point and contacts the bottom of the tungsten powder screen 16, adhering to the bottom of the screen. Due to the adhesion between the powder receiving plate 23 and the bottom of the screen 16, the tungsten powder will not fall; instead, the vibration will disperse any clumps and large pieces, achieving a uniform distribution. After the vibration ends, the second electric push rod 22 inside the tungsten powder collection box 21 can be activated to drive the powder receiving plate 23 downwards. The aperture of the tungsten powder screen 16 is consistent with the qualified tungsten powder particles. As the powder receiving plate 23 descends, the qualified tungsten powder will follow it down. Qualified tungsten powder particles can remain on the tungsten powder screen 16 for sieving. When the powder receiving plate 23 is lowered to the bottom, it is located in the inner cavity of the tungsten powder collection box 21. At the same time, the fixed cylinder 11 can ensure the sealing by using the snap ring 111 and the annular snap groove 24 to prevent tungsten powder from leaking out of the powder receiving plate 23. The gap between the powder receiving plate 23 and the inner ring of the tungsten powder collection box 21 is smaller than the sieving tungsten powder particles, which can prevent tungsten powder from falling. At the same time, the powder receiving plate 23 can finally abut against the limiting sealing ring 25 to complete the limiting, which can improve the sealing between the powder receiving plate 23 and the tungsten powder collection box 21.
[0017] like Figure 4 , Figure 5 As shown, a lifting plate 41 is fixedly installed at the output end of the first electric push rod 4. The front end of the lifting plate 41 is fixedly connected to the rear end of the fixed cylinder 11. A limiting slide rod 31 is fixedly installed on the top rear side of the base plate 3. The limiting slide rod 31 is located between the first electric push rod 4 and the tungsten powder collection box 21. The lifting plate 41 and the limiting slide rod 31 are slidably connected. An anti-detachment disc 32 is fixedly installed at the top of the limiting slide rod 31. Handles 211 are fixedly installed on both the left and right sides of the tungsten powder collection box 21. A cross-shaped slot 212 is opened at the bottom center of the tungsten powder collection box 21. A cross-shaped card plate 33 is fixedly installed on the top front side of the base plate 3. The cross-shaped card plate 33 is engaged with the cross-shaped slot 212. By activating the first electric push rod 4, the lifting plate 41 controls the overall fixed cylinder 11 to rise. At the same time, the lifting plate 41 can slide on the outer wall of the limiting slide bar 31 to maintain stability, and the anti-detachment plate 32 prevents the lifting plate 41 from detaching from the limiting slide bar 31. After the fixed cylinder 11 rises, space is provided for the tungsten powder collection box 21 to be lifted. The tungsten powder collection box 21 can be lifted upwards using the pick-up and put-down handle 211, making it convenient to pour out the tungsten powder on the top of the powder receiving plate 23. At the same time, during installation, the cross-shaped slot 212 at the bottom of the tungsten powder collection box 21 can be aligned with the cross-shaped plate 33 on the top of the base plate 3 and inserted to maintain the stability of the tungsten powder collection box 21.
[0018] The working principle of the cold isostatic pressing tungsten powder vibration uniform powder distribution device will be explained in detail below.
[0019] like Figure 1-5As shown, during use, the powder receiving plate 23 is raised to its highest point and contacts the bottom of the tungsten powder screen 16, adhering to the bottom of the tungsten powder screen 16. Then, simply pour the untreated tungsten powder into the inner ring plate 15. To control the amount poured in, the vibration motor 12 on the front side of the fixed cylinder 11 can be started simultaneously, causing the entire fixed cylinder 11 to drive the screen fixing ring 14, the inner ring plate 15, and the tungsten powder screen 16 to vibrate at high frequency. This allows the poured tungsten powder to spread out quickly, ensuring its height does not exceed the inner ring plate 15. Due to the adhesion between the powder receiving plate 23 and the bottom of the tungsten powder screen 16, the tungsten powder will not fall; it will only be dispersed by the vibration, resulting in a uniform distribution. After the vibration ends, the tungsten powder can be started. The second electric push rod 22 inside the powder collection box 21 drives the powder receiving plate 23 to descend. The aperture of the tungsten powder screen 16 is consistent with the qualified tungsten powder particles. As the powder receiving plate 23 descends, the qualified tungsten powder follows the powder receiving plate 23, while the unqualified tungsten powder particles remain on the tungsten powder screen 16 for sieving. When the powder receiving plate 23 reaches the bottom, it is located inside the tungsten powder collection box 21. At the same time, the fixing cylinder 11 ensures a seal by engaging the retaining ring 111 with the annular groove 24, preventing tungsten powder from leaking out of the powder receiving plate 23. The gap between the powder receiving plate 23 and the inner ring of the tungsten powder collection box 21 is smaller than the sieving tungsten powder particles, preventing tungsten powder from falling off. At the same time, the powder receiving plate 23 can finally abut against the limiting sealing ring 25. Once the limit position is reached, the sealing between the powder receiving plate 23 and the tungsten powder collection box 21 is improved. At this point, the first electric push rod 4 can be activated to control the overall fixed cylinder 11 to rise using the lifting plate 41. Simultaneously, the lifting plate 41 can slide on the outer wall of the limit slide rod 31 to maintain stability, and the anti-detachment disc 32 prevents the lifting plate 41 from detaching from the limit slide rod 31. After the fixed cylinder 11 rises, space is provided for the tungsten powder collection box 21 to be lifted, so that the tungsten powder collection box 21 can be lifted upwards using the handle 211, making it convenient to pour out the tungsten powder on the top of the powder receiving plate 23. At the same time, during installation, the cross-shaped slot 212 at the bottom of the tungsten powder collection box 21 can be aligned with the cross-shaped plate 33 at the top of the base plate 3 to keep the tungsten powder collection box 21 stable. For cleaning the tungsten powder screen 16 or removing large tungsten powder particles that have been screened, simply rotate and remove the four internal thread caps 19 to release the limit on the clamping ring 17. Then, the clamping ring 17 can be removed from the outer wall of the threaded rod 13. The screen fixing ring 14, along with the inner ring plate 15 and the tungsten powder screen 16, can then be disassembled for easy cleaning or collection of large tungsten powder particles. During installation, align the through hole of the screen fixing ring 14 with the threaded rod 13 and insert it. Then, align the clamping ring 17 with the mating hole 18 and insert it into the threaded rod 13. Finally, rotate and tighten the four internal thread caps 19 with the parts of the four threaded rods 13 that extend out of the mating hole 18 to complete the installation of the tungsten powder screen 16.
[0020] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A tungsten powder vibration uniform distribution device for cold isostatic pressing, comprising a vibration mechanism (1), characterized in that: The vibration mechanism (1) is provided with a collection mechanism (2) at its bottom, and a base plate (3) is provided at the bottom of the collection mechanism (2). A first electric push rod (4) is fixedly installed on the rear top of the base plate (3). The vibration mechanism (1) includes a fixed cylinder (11). A vibration motor (12) is fixedly installed on the front side of the fixed cylinder (11). Four threaded uprights (13) are fixedly installed in a ring array on the top of the fixed cylinder (11). An inner ring plate (15) is snapped into the inner ring of the fixed cylinder (11). A screen fixing ring (14) is fixedly installed on the outer wall of the inner ring plate (15). 5) The inner ring is fixedly installed with a tungsten powder screen (16). The screen fixing ring (14) has four through holes in an annular array. The screen fixing ring (14) is engaged with four threaded uprights (13) through the four through holes. A clamping ring (17) is provided above the screen fixing ring (14). The clamping ring (17) has four docking holes (18) in an annular array. The four docking holes (18) are engaged with the four threaded uprights (13) respectively. The top of each of the four threaded uprights (13) is threaded with an internal thread cap (19), and the four internal thread caps (19) are all located above the clamping ring (17).
2. The tungsten powder vibration uniform distribution device for cold isostatic pressing powder loading according to claim 1, characterized in that: The bottom of the fixed cylinder (11) is fixedly connected with a retaining ring (111). The collection mechanism (2) includes a tungsten powder collection box (21). The top of the inner ring of the tungsten powder collection box (21) is provided with an annular groove (24) that passes through its top. The retaining ring (111) is engaged with the annular groove (24), and the inner ring of the retaining ring (111) is aligned vertically with the inner ring of the fixed cylinder (11) and the inner ring of the tungsten powder collection box (21).
3. The tungsten powder vibration uniform distribution device for cold isostatic pressing powder loading according to claim 2, characterized in that: A second electric push rod (22) is fixedly installed at the center of the bottom of the inner wall of the tungsten powder collection box (21). A powder receiving plate (23) is fixedly installed at the output end of the second electric push rod (22). The side of the powder receiving plate (23) is in contact with the inner ring of the fixed cylinder (11), and the upper surface of the powder receiving plate (23) is in contact with the bottom of the tungsten powder screen (16).
4. The tungsten powder vibration uniform distribution device for cold isostatic pressing powder loading according to claim 3, characterized in that: The inner ring of the tungsten powder collection box (21) is fixedly installed with a limiting sealing ring (25). When the powder receiving plate (23) descends to the bottom, its bottom is in contact with the top of the limiting sealing ring (25), and its side is in contact with the inner ring of the tungsten powder collection box (21). When the powder receiving plate (23) descends to the bottom, its upper surface is lower than the bottom of the annular groove (24).
5. The tungsten powder vibration uniform distribution device for cold isostatic pressing powder loading according to claim 2, characterized in that: A lifting plate (41) is fixedly installed at the output end of the first electric push rod (4). The front end of the lifting plate (41) is fixedly connected to the rear end of the fixed cylinder (11). A limiting slide rod (31) is fixedly installed on the top rear side of the base plate (3). The limiting slide rod (31) is located between the first electric push rod (4) and the tungsten powder collection box (21). The lifting plate (41) is slidably connected to the limiting slide rod (31). An anti-detachment disc (32) is fixedly installed at the top end of the limiting slide rod (31).
6. The tungsten powder vibration uniform distribution device for cold isostatic pressing powder loading according to claim 2, characterized in that: The tungsten powder collection box (21) is fixedly installed with handles (211) on both the left and right sides. A cross-shaped slot (212) is provided at the center of the bottom of the tungsten powder collection box (21). A cross-shaped card plate (33) is fixedly installed on the front top of the base plate (3). The cross-shaped card plate (33) is engaged with the cross-shaped slot (212).