F3 rotation axis sintering fixture in a metal injection molding process

Abstract

This utility model discloses a sintering fixture for F3 shafts in metal injection molding. This fixture aims to solve the problem that existing F3 shafts in metal injection molding are prone to warping and deformation during sintering, requiring subsequent shaping and machining, which makes it difficult to guarantee production efficiency and cost control. The fixture includes a base plate, with columns fixedly connected to the four corners of the upper surface of the base plate. A top plate is mounted on the top of each column via a snap-fit ​​assembly. The top plate has multiple mounting holes, and the F3 shaft is placed inside each mounting hole. This utility model places the F3 shaft product on the sintering fixture, and then places the fixture and the F3 shaft together into the sintering furnace. Because the F3 shaft is sintered with its shaft facing downwards, its own gravity prevents warping and deformation during sintering, thus eliminating the need for subsequent shaping and machining, optimizing product quality, and improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of metal injection molding technology, specifically relating to an F3 rotating shaft sintering fixture in the metal injection molding process. Background Technology

[0002] Metal injection molding (MIM) is a molding method in which a plasticized mixture of metal powder and its binder is injected into a mold. It involves first mixing the selected powder with the binder, then granulating the mixture before injection molding into the desired shape. The polymer imparts its viscous flow characteristics to the mixture, which contributes to uniformity in molding, mold cavity filling, and powder loading. After molding, the binder is removed, and the degreased preform is then sintered.

[0003] In the existing metal injection molded F3 shaft, one end of the incomplete gear is placed directly on a flat plate for sintering. During the sintering process, the curved surface of the shaft is prone to warping and deformation, requiring subsequent shaping and machining. This not only makes it difficult to guarantee the production efficiency and cost control of the F3 shaft, but also affects the quality stability. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an F3 shaft sintering fixture in the metal injection molding process. This fixture aims to solve the problem that the curved surface of the F3 shaft in the existing metal injection molding is prone to warping and deformation during sintering, which requires subsequent shaping and machining, making it difficult to guarantee production efficiency and cost control.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, this utility model provides an F3 sintering fixture for metal injection molding process. The fixture includes a base plate, and columns are fixedly connected to the four corners of the upper surface of the base plate. A top plate is set at the top of the columns through a snap-fit ​​assembly. Multiple mounting holes are opened on the top plate, and an F3 sintering shaft is set inside the mounting holes.

[0008] Preferably, the snap-fit ​​assembly includes a positioning post and a positioning groove corresponding to the positioning post. The top of the post has a groove to form a positioning post. There are four positioning grooves, which are opened on the front and rear sides of the lower surface of the top plate. The positioning post is located inside the positioning groove.

[0009] Furthermore, the F3 shaft includes a shaft body and an incomplete gear fixedly connected to the top of the shaft body, the shaft body being located inside the mounting hole.

[0010] Furthermore, the mounting hole is larger than the size of the shaft, and the incomplete gear is larger than the size of the mounting hole.

[0011] Furthermore, a gap is left between the bottom end of the shaft and the base plate.

[0012] Furthermore, the upper surface of the top plate is equipped with multiple buffer components corresponding to the mounting holes, and the shaft passes through the buffer components.

[0013] Furthermore, the buffer assembly includes an annular fixed seat fixedly connected to the upper surface of the top plate, a spring fixedly connected to the upper surface of the annular fixed seat, an annular movable seat fixedly connected to the upper surface of the spring, a limit sleeve fixedly connected to the inner wall of the annular movable seat, the inner wall of the limit sleeve contacting the inner wall of the annular fixed seat, and the mounting hole penetrating the annular fixed seat and the annular movable seat.

[0014] Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention places the F3 shaft product on a sintering fixture, and then puts the fixture and the F3 shaft into a sintering furnace. Since the shaft of the F3 shaft is sintered downwards, it can avoid warping and deformation of the curved surface during sintering due to its own gravity. Therefore, there is no need for subsequent shaping and machining, which optimizes the quality of the product, improves the production efficiency, and enables the product to be mass-produced smoothly, thus achieving the goal of simple, fast and stable quality sintering of ornaments.

[0017] This invention allows the F3 shaft to be inserted into the mounting hole by pinching the incomplete gear. During the insertion process, the incomplete gear can be placed at approximately the bottom height and then released. At this time, the incomplete gear will fall onto the annular movable seat and compress the spring. The spring in the buffer assembly provides cushioning to prevent excessive impact and damage, thereby increasing the speed at which the F3 shaft is inserted into the mounting hole and improving efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a front view structural diagram of this utility model.

[0020] Figure 3 This is an exploded structural diagram of the present invention.

[0021] Figure 4 This is a schematic diagram of the installation structure of the top plate of this utility model.

[0022] Figure 5This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0023] Figure 6 This is the utility model Figure 5 A magnified structural diagram of point A in the middle.

[0024] The markings in the attached diagram are as follows: 1. Base plate; 2. Column; 3. Snap-fit ​​assembly; 4. Top plate; 5. Mounting hole; 6. F3 rotating shaft; 7. Buffer assembly; 301. Positioning post; 302. Positioning groove; 303. Groove; 601. Shaft; 602. Incomplete gear; 701. Annular fixed seat; 702. Spring; 703. Annular movable seat; 704. Limiting sleeve. Detailed Implementation

[0025] Example 1

[0026] This specific embodiment is an F3 rotating shaft sintering fixture in a metal injection molding process, and its structural schematic diagram is shown below. Figures 1-6 As shown, the fixture includes a base plate 1, with columns 2 fixedly connected to the four corners of the upper surface of the base plate 1. A top plate 4 is provided on the top of the columns 2 through a snap-fit ​​assembly 3. Multiple mounting holes 5 are provided on the top plate 4, and an F3 rotating shaft 6 is provided inside the mounting holes 5.

[0027] like Figure 1 and Figure 4 As shown: In this embodiment, the snap-fit ​​assembly 3 includes a positioning post 301 and a positioning groove 302 corresponding to the positioning post 301. The top of the column 2 is provided with a groove 303 to form the positioning post 301. The groove 303 penetrates the front and rear sides of the column 2. There are four positioning grooves 302, which are provided on the front and rear sides of the lower surface of the top plate 4. The positioning post 301 is located inside the positioning groove 302. In use, the four corners of the top plate 4 are placed on the column 2, so that the positioning post 301 at the top of the column 2 is located in the positioning groove 302 on the front and rear sides of the top plate 4, thereby making the top plate 4 and the column 2 firmly connected and preventing tilting.

[0028] like Figure 1 and Figure 3 As shown: In this embodiment, the F3 shaft 6 includes a shaft body 601 and an incomplete gear 602 fixedly connected to the top of the shaft body 601. The shaft body 601 is located inside the mounting hole 5, and the lower surface of the incomplete gear 602 is in contact with the upper surface of the top plate 4. The shaft body 601 is supported by the incomplete gear 602. Since the shaft body 601 of the F3 shaft 6 is sintered downwards, it can avoid warping and deformation of the curved surface during sintering due to its own gravity.

[0029] like Figure 2 and Figure 3As shown: In this embodiment, the mounting hole 5 is larger than the size of the shaft 601, and the incomplete gear 602 is larger than the size of the mounting hole 5; this makes it easy to insert the shaft 601 of the F3 rotating shaft 6, which is very convenient.

[0030] like Figure 1 and Figure 2 As shown: In this embodiment, a gap is left between the bottom end of the shaft 601 and the base plate 1; this avoids contact between the shaft 601 and the base plate 1 and prevents collisions.

[0031] Working principle: During use, place the four corners of the top plate 4 on the column 2, so that the positioning pin 301 at the top of the column 2 is located in the positioning groove 302 on the front and rear sides of the top plate 4, thereby making the top plate 4 and the column 2 firmly connected. Then, the shaft 601 of the F3 rotating shaft 6 in the metal injection molding process is placed into the mounting hole 5, so that the lower surface of the incomplete gear 602 contacts the upper surface of the top plate 4, until the F3 rotating shaft 6 is placed into all the mounting holes 5 on the top plate 4. Then, the fixture together with the F3 rotating shaft 6 is placed into the sintering furnace. Since the shaft 601 of the F3 rotating shaft 6 is sintered downwards, it can avoid the warping deformation of the curved surface during sintering due to its own gravity, thus eliminating the need for subsequent shaping and machining, optimizing product quality, improving production efficiency, and enabling the product to be mass-produced smoothly.

[0032] Example 2

[0033] The difference from Example 1 is that, as Figure 5 and Figure 6 As shown: In order to increase the speed at which the F3 shaft 6 is inserted into the mounting hole 5 and to avoid damage to the metal injection molded F3 shaft 6, multiple buffer components 7 corresponding to the mounting hole 5 are installed on the upper surface of the top plate 4, and the shaft body 601 passes through the buffer components 7; the buffer components 7 can buffer the F3 shaft 6 inserted into the mounting hole 5 and avoid hard collisions.

[0034] like Figure 5 and Figure 6As shown: In this embodiment, the buffer assembly 7 includes an annular fixed seat 701 fixedly connected to the upper surface of the top plate 4. A spring 702 is fixedly connected to the upper surface of the annular fixed seat 701, and an annular movable seat 703 is fixedly connected to the upper surface of the spring 702. A limiting sleeve 704 is fixedly connected to the inner wall of the annular movable seat 703. The inner wall of the limiting sleeve 704 contacts the inner wall of the annular fixed seat 701. The mounting hole 5 passes through the annular fixed seat 701 and the annular movable seat 703. In use, the incomplete gear 602 is pinched to insert the shaft 601 of the F3 rotating shaft 6 into the mounting hole 5. During the insertion into the mounting hole 5, the incomplete gear 602 only needs to be placed at approximately the bottom height before releasing. At this time, the incomplete gear 602 will fall onto the annular movable seat 703 and compress the spring 702. The spring 702 in the buffer assembly 7 provides buffering to avoid excessive impact and damage, thereby increasing the speed at which the F3 rotating shaft 6 is inserted into the mounting hole 5 and improving efficiency.

[0035] All technical features in this embodiment can be freely combined according to actual needs.

[0036] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An F3 sintering fixture for a metal injection molding process, the fixture comprising a base plate (1), characterized in that: The base plate (1) has four corners of the upper surface fixedly connected with columns (2). The top of the column (2) is provided with a top plate (4) through a snap-fit ​​assembly (3). The top plate (4) has multiple mounting holes (5). The mounting holes (5) are provided with F3 rotating shafts (6).

2. The F3 rotating shaft sintering fixture in the metal injection molding process according to claim 1, characterized in that, The snap-fit ​​assembly (3) includes a positioning post (301) and a positioning groove (302) corresponding to the positioning post (301). The top of the column (2) is provided with a groove (303) to form the positioning post (301). There are four positioning grooves (302) and they are opened on the front and rear sides of the lower surface of the top plate (4). The positioning post (301) is located inside the positioning groove (302).

3. The F3 rotating shaft sintering fixture in the metal injection molding process according to claim 2, characterized in that, The F3 shaft (6) includes a shaft body (601) and an incomplete gear (602) fixedly connected to the top of the shaft body (601), the shaft body (601) being located inside the mounting hole (5).

4. The F3 rotating shaft sintering fixture in the metal injection molding process according to claim 3, characterized in that, The mounting hole (5) is larger than the size of the shaft (601), and the incomplete gear (602) is larger than the size of the mounting hole (5).

5. The F3 rotating shaft sintering fixture in the metal injection molding process according to claim 4, characterized in that, There is a gap between the bottom end of the shaft (601) and the base plate (1).

6. The F3 rotating shaft sintering fixture in the metal injection molding process according to claim 3, characterized in that, The upper surface of the top plate (4) is equipped with a plurality of buffer components (7) corresponding to the mounting holes (5), and the shaft (601) passes through the buffer components (7).

7. The F3 rotating shaft sintering fixture in the metal injection molding process according to claim 6, characterized in that, The buffer assembly (7) includes an annular fixed seat (701) fixedly connected to the upper surface of the top plate (4). A spring (702) is fixedly connected to the upper surface of the annular fixed seat (701). An annular movable seat (703) is fixedly connected to the upper surface of the spring (702). A limiting sleeve (704) is fixedly connected to the inner wall of the annular movable seat (703). The inner wall of the limiting sleeve (704) contacts the inner wall of the annular fixed seat (701). The mounting hole (5) penetrates the annular fixed seat (701) and the annular movable seat (703).

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