A rotary powder distributor for powder forming

Abstract

The utility model discloses a kind of rotary powder distributing devices for powder forming, belong to powder forming technical field, including powder scraping device and the supporting device for supporting the rotation of the powder scraping device, the powder scraping device includes powder scraping subassembly and the rotating shaft subassembly for being detachably connected with the powder scraping subassembly, the powder scraping subassembly includes rotating seat, and a plurality of powder scraping needles are detachably installed on the rotating seat. The technical scheme of the present application can destroy the arching effect between the powder by setting the powder scraping device that can rotate, ensure the fluidity of the powder, eliminate the gap between the powder as far as possible, make the accumulation between the powder more compact, ensure that the green body after forming has no cracking phenomenon, the density meets production demand, and the product performance after sintering meets the standard.

Description

Technical Field

[0001] This utility model relates to the field of powder forming technology, and in particular to a rotary powder feeding device for powder forming. Background Technology

[0002] In existing technologies, during the powder molding process, bridging effects easily occur between irregular particles. If the bridging effect is too strong, voids or uneven structures will form inside the molded body. When external pressure cannot effectively break these excessively strong bridging structures, the particles cannot fully fill the gaps, resulting in defects. In the manufacture of precision electronic ceramic components, such as electrostatic chuck ceramics, internal voids can cause cracking of the pressed green body and even affect the electrical properties of the ceramic. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a rotary powder feeding device for powder forming, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A rotary powder feeding device for powder forming includes a powder scraping device and a support device for supporting the rotation of the powder scraping device. The powder scraping device includes a powder scraping assembly and a rotating shaft assembly for detachable connection with the powder scraping assembly. The powder scraping assembly includes a rotating seat on which a plurality of powder scraping needles are detachably mounted.

[0006] Preferably, the rotating base has a plurality of pin holes for mounting the powder scraping needle, and the end of the powder scraping needle that is mounted on the rotating base is provided with a limiting shaft. The size of the limiting shaft is larger than the size of the powder scraping needle. The top of the rotating base is provided with a mounting groove, and a fixing plate for limiting the limiting shaft is provided in the mounting groove. The fixing plate is detachably connected to the rotating base.

[0007] Preferably, the rotating shaft assembly includes a rotating shaft, a lower connecting plate at the bottom of the rotating shaft, the lower connecting plate being detachably connected to the rotating seat, and a rotating handwheel at the top of the rotating shaft.

[0008] Preferably, the rotating handwheel includes a handle, which is fixedly connected to the rotating shaft via an upper connecting plate.

[0009] Preferably, the support device includes a bearing seat for supporting the rotating shaft, the bearing seat is mounted on an upper plate, the upper plate is detachably mounted on a left crossbar and a right crossbar, and the left crossbar and the right crossbar are arranged parallel to each other.

[0010] Preferably, the support device further includes a lower plate, the rotating shaft passes through the lower plate and is connected to a lower connecting plate located below the lower plate, the lower plate is located below the left crossbar and the right crossbar, and is detachably connected to the left crossbar and the right crossbar.

[0011] Preferably, the support device further includes a first support member and a second support member located at both ends below the left crossbar, and a third support member and a fourth support member located at both ends below the right crossbar.

[0012] The above technical solution has the following beneficial effects:

[0013] The technical solution of this application, by setting a rotating powder scraper, can break the bridging effect between powders, ensure the fluidity of powders, eliminate gaps between powders as much as possible, make the powders more compact, ensure that the green body after molding is free from cracking, the density meets production requirements, and the performance of the sintered product meets the standards. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a rotary powder feeding device for powder forming according to the present invention.

[0015] Figure 2 This is another three-dimensional structural schematic diagram of a rotary powder feeding device for powder forming according to the present invention;

[0016] Figure 3 This is a schematic diagram of the main structure of a rotary powder feeding device for powder forming according to the present invention.

[0017] Figure 4 for Figure 3 Enlarged cross-sectional view of structure A in the middle;

[0018] Figure 5 This is a right-side structural schematic diagram of a rotary powder feeding device for powder forming according to the present invention.

[0019] Figure 6 This is a top view schematic diagram of a rotary powder feeding device for powder forming according to the present invention. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] During the powder forming process, bridging effects are prone to occur between irregular particles. If the bridging effect is too strong, voids or uneven structures will be formed inside the molded body. When external pressure cannot effectively destroy these strong bridging structures, the particles cannot fully fill the gaps, resulting in defects. When manufacturing electronic ceramic components for electrostatic chucks, internal voids can cause cracking of the pressed green body and even affect the electrical properties of the ceramic.

[0022] Based on the above-mentioned prior art, the technical problem to be solved by this application is that bridging effect is prone to occur in the state of powder accumulation, especially in fine powder and molded bodies with large thickness and diameter.

[0023] refer to Figures 1-6 In order to solve the above-mentioned technical problems, this application discloses a rotary powder feeding device for powder forming, including a powder scraping device and a support device for supporting the rotation of the powder scraping device. The powder scraping device includes a powder scraping assembly and a rotating shaft assembly for detachably connecting with the powder scraping assembly. The powder scraping assembly includes a rotating seat 2, and a plurality of powder scraping needles 1 are detachably installed on the rotating seat 2.

[0024] Specifically, the support device is used to support the powder scraping assembly. The powder scraping assembly rotates during operation. After rotation, it can break the bridging effect that occurs when the powder is piled up, allowing the particles to fully fill the gaps and avoid defects in the prepared electronic ceramics. Specifically, the powder scraping assembly rotates to scrape the powder. The rotation of the powder scraping assembly is achieved by manually rotating the rotating shaft assembly. The rotating seat 2 is used to support and install the powder scraping needles 1. The powder scraping needles 1 directly contact the powder to scrape it. The powder scraping needles 1 are made of metal or alloy materials, such as tungsten or its alloy. The powder scraping needles 1 can be arranged in two rows along the length of the rotating seat 2. The number of powder scraping needles 1 in the two rows can be the same. The distance between any two adjacent powder scraping needles 1 is equal, that is, several powder scraping needles 1 are evenly arranged along the length of the rotating seat 2.

[0025] The rotary powder feeding device for powder forming disclosed in this application breaks the bridging effect between powders by rotating and stirring, assists the powder flow, ensures that the density of the product meets the requirements after forming, and prevents the product from cracking after sintering.

[0026] In some embodiments, the rotating base 2 is provided with a plurality of pin holes for mounting the powder scraping needle 1. The end of the powder scraping needle 1 and the rotating base 2 is provided with a limiting shaft 17. The size of the limiting shaft 17 is larger than the size of the powder scraping needle 1. The top of the rotating base 2 is provided with a mounting groove. The mounting groove is provided with a fixing plate 3 for limiting the limiting shaft 17. The fixing plate 3 is detachably connected to the rotating base 2.

[0027] Specifically, the powder scraping needle 1 is assembled, which facilitates replacement if it is damaged. The needle hole on the rotating seat 2 consists of two parts: one part mates with the limiting shaft 17, and the other part mates with the powder scraping needle 1. The size of the limiting shaft 17 is larger than the size of the powder scraping needle 1. Specifically, both the limiting shaft 17 and the powder scraping needle 1 can be cylindrical, that is, the diameter of the powder scraping needle 1 is smaller than the diameter of the limiting shaft 17. During installation, start from the side with the larger needle hole, let the head of the powder scraping needle 1 pass through the needle hole, and then pass out of the needle hole, so that the bottom side wall of the limiting shaft 17 contacts and mates with the part where the size of the needle hole changes, thus restricting the powder scraping needle 1 from moving further downward. Specifically, the diameter of the powder scraping needle 1 is 0.5-1.5mm and the length is 40-70mm, and the diameter of the limiting shaft 17 is 1.5-2.5mm and the length is 4-7mm. After the limit shaft 17 is installed in place, a fixing plate 3 is set to limit the upward movement of the powder scraping needle 1. The mounting groove is used to limit and quickly position the fixing plate 3 so that it can quickly move to the correct position. The fixing plate 3 can be connected to the rotating seat 2 by bolts. The rotating seat 2 is provided with threaded holes, and the fixing plate 3 is provided with through holes at the corresponding positions. When fixing, the bolts are connected to the threaded holes through the through holes.

[0028] In some embodiments, the rotating shaft assembly includes a rotating shaft 5, a lower connecting plate 4 at the bottom of the rotating shaft 5, the lower connecting plate 4 being detachably connected to the rotating seat 2, and a rotating handwheel at the top of the rotating shaft 5.

[0029] Specifically, the lower connecting plate 4 and the rotating seat 2 can be connected by bolts. That is, the rotating seat 2 is provided with threaded holes, and the two can be connected by bolts. The rotating handwheel is used by the operator to operate the rotating shaft 5 to rotate. The rotating shaft 5 can rotate the rotating seat 2, which can scrape the powder.

[0030] In some embodiments, the rotating handwheel includes a handle 10, which is fixedly connected to the rotating shaft 5 via an upper connecting plate 9.

[0031] Specifically, the handle 10 is for direct contact with the human hand during operation, while the upper connecting plate 9 and the rotating shaft 5 are fixedly connected. The handle 10 and the upper connecting plate 9 can be fixedly connected or threadedly connected.

[0032] In some embodiments, the support device includes a bearing seat 8 for supporting the rotating shaft 5. The bearing seat 8 is mounted on the upper plate 6, which is detachably mounted on the left crossbar 11 and the right crossbar 12. The left crossbar 11 and the right crossbar 12 are arranged parallel to each other.

[0033] The bearing housing 8 can be equipped with a bearing for supporting the rotation of the shaft 5. The bearing housing 8 can be fixedly mounted on the upper plate 6 or can be installed on the upper plate 6 by bolts. The left crossbar 11 and the right crossbar 12 are used to support the upper plate 6. The upper plate 6 can be installed on the left crossbar 11 and the right crossbar 12 by bolts. The left crossbar 11 and the right crossbar 12 are arranged parallel to each other.

[0034] In some embodiments, the support device further includes a lower plate 7, and a rotating shaft 5 passes through the lower plate 7 and is connected to a lower connecting plate 4 located below the lower plate 7. The lower plate 7 is located below the left crossbar 11 and the right crossbar 12, and is detachably connected to the left crossbar 11 and the right crossbar 12.

[0035] Specifically, the lower plate 7 has a through hole for the shaft 5 to pass through, located below the upper plate 6. It is detachably connected to the left crossbar 11 and the right crossbar 12. Specifically, it can be connected to the left crossbar 11 and the right crossbar 12 by bolts. When connecting, bolt holes can be provided on the left crossbar 11 and the right crossbar 12, and then the lower plate 7 can be installed by bolts. Alternatively, through holes can be provided on the left crossbar 11 and the right crossbar 12, allowing a longer bolt to pass through the upper plate 6 and the lower plate 7, and then a nut can be screwed on the end of the longer bolt for fixation.

[0036] In some embodiments, the support device further includes a first support member 13 and a second support member 15 located at both ends below the left crossbar 11, and a third support member 14 and a fourth support member 16 located at both ends below the right crossbar 12.

[0037] Specifically, the first support member 13 and the second support member 15 are used to support the left crossbar 11. The minimum distance between the first support member 13 and the second support member 15 must be greater than the length of the rotating seat 2 to ensure that the rotating seat 2 can rotate. The third support member 14 and the fourth support member 16 are used to support the right crossbar 12. Similarly, the arrangement of the third support member 14 and the fourth support member 16 must also ensure that they do not interfere with the rotating seat 2.

[0038] The technical solution of this application, by setting a rotating powder scraper, can break the bridging effect between powders, ensure the fluidity of powders, eliminate gaps between powders as much as possible, make the powders more compact, ensure that the green body after molding is free from cracking, the density meets production requirements, and the performance of the sintered product meets the standards.

[0039] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A rotary powder feeding device for powder forming, characterized in that, It includes a powder scraping device and a support device for supporting the rotation of the powder scraping device. The powder scraping device includes a powder scraping assembly and a rotating shaft assembly for detachably connecting to the powder scraping assembly. The powder scraping assembly includes a rotating seat (2) on which a plurality of powder scraping needles (1) are detachably mounted.

2. The rotary powder feeding device for powder forming according to claim 1, characterized in that, The rotating seat (2) is provided with a plurality of pin holes for installing the powder scraping needle (1). The end of the powder scraping needle (1) and the rotating seat (2) is provided with a limiting shaft (17). The size of the limiting shaft (17) is larger than the size of the powder scraping needle (1). The top of the rotating seat (2) is provided with an installation groove. The installation groove is provided with a fixing plate (3) for limiting the limiting shaft (17). The fixing plate (3) is detachably connected to the rotating seat (2).

3. The rotary powder feeding device for powder forming according to claim 1, characterized in that, The rotating shaft assembly includes a rotating shaft (5), a lower connecting plate (4) is provided at the bottom of the rotating shaft (5), the lower connecting plate (4) is detachably connected to the rotating seat (2), and a rotating handwheel is provided at the top of the rotating shaft (5).

4. A rotary powder feeding device for powder forming according to claim 3, characterized in that, The rotating handwheel includes a handle (10), which is fixedly connected to the rotating shaft (5) via an upper connecting plate (9).

5. A rotary powder feeding device for powder forming according to claim 3, characterized in that, The support device includes a bearing seat (8) for supporting the rotating shaft (5), the bearing seat (8) is mounted on the upper plate (6), the upper plate (6) is detachably mounted on the left crossbar (11) and the right crossbar (12), the left crossbar (11) and the right crossbar (12) are arranged parallel to each other.

6. A rotary powder feeding device for powder forming according to claim 5, characterized in that, The support device also includes a lower plate (7), the rotating shaft (5) passes through the lower plate (7) and is connected to the lower connecting plate (4) located below the lower plate (7). The lower plate (7) is located below the left crossbar (11) and the right crossbar (12), and is detachably connected to the left crossbar (11) and the right crossbar (12).

7. A rotary powder feeding device for powder forming according to claim 6, characterized in that, The support device also includes a first support member (13) and a second support member (15) located at both ends below the left crossbar (11), and a third support member (14) and a fourth support member (16) located at both ends below the right crossbar (12).

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