A MIM ring-shaped article inner support shaping mechanism

Abstract

This utility model discloses an inner support shaping mechanism for MIM ring-shaped products, including an inner support insert, a moving mold assembly, and a fixed mold assembly for fixing the inner support insert. The inner support insert includes a fixing part and multiple contact arms disposed on the fixing part, arranged in a ring array. The moving mold assembly is provided with an inner support pin, which slidably abuts against the inner wall surface of the contact arm to drive the contact arm to elastically deform outward. When the fixed mold assembly and the moving mold assembly of this MIM ring-shaped product inner support shaping mechanism are closed, the inner support pin drives the contact arm of the inner support insert to elastically bend outward, thereby squeezing the inner hole of the MIM ring-shaped product and correcting the inner hole of the MIM ring-shaped product to conform to the preset shape and size, effectively improving the quality of the MIM ring-shaped product. After shaping, the contact arm of the inner support insert springs back and moves away from the inner wall surface of the MIM ring-shaped product, making it easy to remove the MIM ring-shaped product.

Description

Technical Field

[0001] This utility model relates to the field of forming mold technology, and in particular to a MIM ring product inner support forming mechanism. Background Technology

[0002] MIM (Metal Injection Molding) is a widely used metal fabrication process in manufacturing. MIM is a molding method that involves injecting a plasticized mixture of metal powder and its binder into a mold. It involves first mixing the selected metal powder with the binder, then granulating the mixture before injection molding into the desired shape. However, in MIM production, after injection molding, the resulting semi-finished product must undergo debonding and sintering. Irregular deformation can occur during debonding and sintering, leading to defective products. For example, in the fabrication of ring-shaped products, after sintering the semi-finished ring, the inner diameter shrinks significantly, causing the inner hole size to deviate from the preset value. Therefore, further shaping of the ring is necessary. Existing shaping mechanisms typically have inserts that are in close contact with the inner wall of the product after shaping, making it difficult to remove the shaped product. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a new internal support and shaping mechanism for MIM ring products, which can correct the inner hole shape and size of MIM ring products while facilitating the subsequent removal of the shaped MIM ring products.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: an inner support shaping mechanism for MIM ring products, including an inner support insert, a moving mold assembly, and a fixed mold assembly for fixing the inner support insert; the inner support insert includes a fixed part and a plurality of contact arms disposed on the fixed part, the plurality of contact arms being arranged in a ring array; the moving mold assembly is provided with an inner support pin, the inner support pin being slidably abutting against the inner wall surface of the contact arm to drive the contact arm to elastically deform outward.

[0005] Furthermore, the fixed mold assembly is provided with a first pressing insert, the side of the first pressing insert near the moving mold assembly being adapted to a portion of the outer wall surface of the MIM ring article.

[0006] Furthermore, the fixed mold assembly is provided with a second pressing insert, the side of the second pressing insert near the fixed mold assembly being adapted to a portion of the outer wall surface of the MIM ring article.

[0007] Furthermore, the second pressing insert has a clearance notch.

[0008] Furthermore, the fixed mold assembly is provided with multiple sliders, which can slide relative to the fixed mold assembly to approach or move away from the inner support insert. The side of the slider that approaches the inner support insert is adapted to a portion of the outer wall surface of the MIM ring article. The moving mold assembly is provided with a shovel base for driving the sliders.

[0009] Furthermore, the fixed mold assembly is provided with a slide groove, and the slider slides in conjunction with the slide groove.

[0010] Furthermore, the end of the slide away from the inner support insert is connected to the outer side of the fixed mold assembly, and a limiting element is provided in the slide to limit the movement stroke of the slider.

[0011] Furthermore, the slider includes a sliding seat and an adapter block. The sliding seat is slidably connected to the fixed mold assembly, and the adapter block is located on the side of the sliding seat near the inner support insert, and the adapter block is adapted to a portion of the outer wall surface of the MIM ring product.

[0012] Furthermore, an elastic element is provided on the side of the slider near the inner support insert.

[0013] Furthermore, the side of the shovel base near the slider and / or the side of the slider near the shovel base are provided with multiple oil storage tanks.

[0014] The beneficial effects of this utility model are as follows: When the fixed mold assembly and the moving mold assembly of the MIM ring product inner support shaping mechanism are closed, the inner support pin drives the contact arm of the inner support insert to elastically bend and deform outward, thereby squeezing the inner hole of the MIM ring product and correcting the inner hole of the MIM ring product to conform to the preset shape and size, which effectively improves the quality of the MIM ring product. After the shaping is completed, the contact arm of the inner support insert springs back and moves away from the inner wall surface of the MIM ring product, making it convenient to remove the MIM ring product. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the MIM ring-shaped product inner support shaping mechanism according to Embodiment 1 of this utility model;

[0016] Figure 2 This is a cross-sectional view of the MIM annular product inner support shaping mechanism according to Embodiment 1 of this utility model;

[0017] Figure 3 This is a partial structural diagram of the MIM annular product inner support and shaping mechanism according to Embodiment 1 of this utility model. Figure 1 ;

[0018] Figure 4 for Figure 3 Enlarged detail of section A in the middle;

[0019] Figure 5 This is a partial structural diagram of the MIM annular product inner support and shaping mechanism according to Embodiment 1 of this utility model. Figure 1 ;

[0020] Figure 6 for Figure 5 Enlarged detail of section B in the middle;

[0021] Figure 7 This is a schematic diagram of the inner support insert in the inner support shaping mechanism of the MIM ring product according to Embodiment 1 of this utility model;

[0022] Figure 8 This is a schematic diagram of the slider and spring in the inner support shaping mechanism of the MIM ring product according to Embodiment 1 of this utility model.

[0023] Label Explanation:

[0024] 1. Inner support insert; 11. Fixing part; 12. Contact arm;

[0025] 2. Fixed mold assembly; 21. Slide groove; 22. Limiting component;

[0026] 3. Moving mold assembly;

[0027] 4. Internal support pin;

[0028] 5. Slider; 51. Sliding seat; 52. Adaptor block; 53. Elastic element;

[0029] 6. Shovel base; 61. Oil storage tank;

[0030] 7. First pressing insert;

[0031] 8. Second pressing insert; 81. Clearance notch;

[0032] 9. MIM ring-shaped products. Detailed Implementation

[0033] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0034] Please refer to Figures 1 to 8 A MIM ring-shaped article inner support shaping mechanism includes an inner support insert 1, a moving mold assembly 3, and a fixed mold assembly 2 for fixing the inner support insert 1; the inner support insert 1 includes a fixing part 11 and a plurality of contact arms 12 disposed on the fixing part 11, the plurality of contact arms 12 being arranged in a ring array; the moving mold assembly 3 is provided with an inner support pin 4, the inner support pin 4 being slidably abutting against the inner wall surface of the contact arm 12 to drive the contact arm 12 to elastically deform outward.

[0035] As can be seen from the above description, the beneficial effects of this utility model are as follows: When the fixed mold assembly 2 and the moving mold assembly 3 of the MIM ring product inner support shaping mechanism are closed, the inner support pin 4 drives the contact arm 12 of the inner support insert 1 to elastically bend and deform outward, thereby squeezing the inner hole of the MIM ring product 9 and correcting the inner hole of the MIM ring product 9 to conform to the preset shape and size, which effectively improves the quality of the MIM ring product 9. After the shaping is completed, the contact arm 12 of the inner support insert 1 springs back and moves away from the inner wall surface of the MIM ring product 9, making it convenient to remove the MIM ring product 9.

[0036] Furthermore, the fixed mold assembly 2 is provided with a first pressing insert 7, the side of the first pressing insert 7 near the moving mold assembly 3 being adapted to part of the outer wall surface of the MIM ring article 9.

[0037] As can be seen from the above description, the first pressing insert 7 can squeeze the outer wall surface of the MIM ring product 9 when the mold is closed, thereby correcting the shape of the MIM ring product 9.

[0038] Furthermore, the fixed mold assembly 2 is provided with a second pressing insert 8, the side of the second pressing insert 8 near the fixed mold assembly 2 being adapted to a portion of the outer wall surface of the MIM ring article 9.

[0039] As described above, the second pressing insert 8 can squeeze the outer wall surface of the MIM ring product 9 when the mold is closed, thereby correcting the shape of the MIM ring product 9.

[0040] Furthermore, the second pressing insert 8 is provided with an avoidance notch 81.

[0041] As described above, the clearance notch 81 is used to avoid part of the protruding structure of the MIM ring-shaped product 9.

[0042] Furthermore, the fixed mold assembly 2 is provided with a plurality of sliders 5, which are slidable relative to the fixed mold assembly 2 to approach or move away from the inner support insert 1. The side of the slider 5 that approaches the inner support insert 1 is adapted to a portion of the outer wall surface of the MIM ring article 9. The moving mold assembly 3 is provided with a shovel base 6 for driving the sliders 5.

[0043] As described above, when the mold is closed, the slider 5 can restrict the shape and size of the MIM ring product 9 from the outside, which can further improve the dimensional accuracy of the corrected MIM ring product 9 and prevent the MIM ring product 9 and the inner support insert 1 from breaking. When the mold is opened, the slider 5 can move away from the inner support insert 1 to facilitate the removal of the MIM ring product 9.

[0044] Furthermore, the fixed mold assembly 2 is provided with a slide groove 21, and the slider 5 slides and engages with the slide groove 21.

[0045] As can be seen from the above description, the sliding connection between the fixed mold assembly 2 and the slider 5 is simple, stable, and conducive to improving service life.

[0046] Furthermore, the end of the slide groove 21 away from the inner support insert 1 is connected to the outer side of the fixed mold assembly 2, and a limiting member 22 is provided in the slide groove 21 to limit the movement stroke of the slider 5.

[0047] As can be seen from the above description, the slide 21 connects to the outer side of the fixed mold assembly 2, which is conducive to cutting and forming, and the limiting member 22 can prevent the slider 5 from exiting the fixed mold assembly 2 from the end opening of the slide 21.

[0048] Furthermore, the slider 5 includes a sliding seat 51 and an adapter block 52. The sliding seat 51 is slidably connected to the fixed mold assembly 2. The adapter block 52 is located on the side of the sliding seat 51 near the inner support insert 1, and the adapter block 52 is adapted to a portion of the outer wall surface of the MIM ring product 9.

[0049] As can be seen from the above description, the adapter block 52 can be replaced according to the shape of the MIM ring product 9, which is beneficial to improving the service life of the slider 5.

[0050] Furthermore, the slider 5 is provided with an elastic element 53 on the side near the inner support insert 1.

[0051] As can be seen from the above description, when the mold is opened, the elastic force applied by the elastic element 53 to the slider 5 will drive the slider to move away from the inner support insert 1, thereby facilitating the removal of the MIM ring product.

[0052] Furthermore, the side of the shovel base 6 near the slider 5 and / or the side of the slider 5 near the shovel base 6 are provided with a plurality of oil storage tanks 61.

[0053] As can be seen from the above description, the oil storage tank 61 can store lubricating oil to ensure smooth relative sliding between the shovel base 6 and the slider 5.

[0054] Please refer to Figures 1 to 8One embodiment of this utility model is as follows: a MIM ring-shaped product inner support forming mechanism, including an inner support insert 1, a moving mold assembly 3, and a fixed mold assembly 2 for fixing the inner support insert 1. The moving mold assembly 3 is movable relative to the fixed mold assembly 2 to close or separate from the fixed mold assembly 2. The inner support insert 1 includes a fixing part 11 and a plurality of contact arms 12 disposed on the fixing part 11, arranged in a ring array. The moving mold assembly 3 is provided with an inner support pin 4, which can slide against the inner wall surface of the contact arm 12 to drive the contact arm 12 to undergo elastic deformation outward. In this embodiment, the fixing part 11 and the contact arm 12 are integrally formed structures, and the inner support insert 1 is made of a metal material with a certain elasticity, such as iron or steel. The fixing part 11 and the fixed mold assembly 2 are connected by screws. The contact arm 12 is inserted into the inner hole of the MIM ring-shaped product 9. When the mold is closed, the contact arm 12 is used to press the inner wall surface of the MIM ring-shaped product 9. The number of contact arms 12 is four. The MIM ring-shaped product 9 has a circular ring structure, and the outer walls of the four contact arms 12 are cylindrical, corresponding to the inner holes of the MIM ring-shaped product 9. The inner walls of the four contact arms 12 are all conical, and the inner support insert 1 is in the shape of an inverted frustum. In other embodiments, the outer walls of the contact arms 12 are adapted to the shape of the MIM ring-shaped product 9, and it is also feasible for the outer walls of the contact arms 12 to be flat or other curved surfaces; the shape of the contact arms 12 can be two, three or more; the inner walls of the contact arms 12 and the outer walls of the inner support pin 4 can be inclined.

[0055] like Figure 4 As shown, the fixed mold assembly 2 is provided with a first pressing insert 7, the side of the first pressing insert 7 near the moving mold assembly 3 being adapted to a portion of the outer wall surface of the MIM annular article 9. Specifically, there are two first pressing inserts 7, which are respectively provided on both sides of the inner support insert 1. In other embodiments, the number of first pressing inserts 7 may be one, three or more.

[0056] like Figure 6 As shown, the fixed mold assembly 2 is provided with a second pressing insert 8, the side of the second pressing insert 8 near the fixed mold assembly 2 being adapted to a portion of the outer wall surface of the MIM annular article 9. Specifically, the number of the second pressing insert 8 and the first pressing insert 7 are arranged in a one-to-one correspondence, with the two first pressing inserts 7 respectively located on both sides of the inner support insert 1. The two first pressing inserts 7 and the two second pressing inserts 8 are each divided into two groups, each group including one first pressing insert 7 and one second pressing insert 8, with each first pressing insert 7 and second pressing insert 8 in each group respectively used to press against the opposite sides of the same part on the MIM annular article 9. In other embodiments, the number of second pressing inserts 8 may be one, three, or more.

[0057] like Figure 6As shown, in order to allow the second pressing insert 8 to avoid the protruding structure of the MIM annular product 9, the second pressing insert 8 is provided with an avoidance notch 81.

[0058] like Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, the fixed mold assembly 2 is provided with multiple sliders 5. The sliders 5 are slidable relative to the fixed mold assembly 2 to move closer to or away from the inner support insert 1. The side of the slider 5 that is close to the inner support insert 1 is adapted to a portion of the outer wall surface of the MIM ring-shaped product 9. The moving mold assembly 3 is provided with shovel bases 6 for driving the sliders 5. Specifically, there are two sliders 5, and the number of shovel bases 6 corresponds one-to-one with the number of sliders 5.

[0059] like Figure 3 As shown, the fixed mold assembly 2 is provided with a sliding groove 21. The slider 5 includes a sliding seat 51 and an adapter block 52. The sliding seat 51 is slidably connected to the fixed mold assembly 2. The adapter block 52 is located on the side of the sliding seat 51 near the inner support insert 1, and the adapter block 52 is adapted to a portion of the outer wall surface of the MIM annular product 9. Specifically, the sliding seat 51 and the adapter block 52 are connected by screws.

[0060] like Figure 3 As shown, the end of the slide groove 21 away from the inner support insert 1 is connected to the outer side of the fixed mold assembly 2. A limiting member 22 is provided in the slide groove 21 to limit the movement stroke of the slider 5. Specifically, the limiting member 22 is a screw, and a threaded hole that mates with the limiting member 22 is provided at the bottom of the slide groove 21.

[0061] like Figure 2 and Figure 8 As shown, the slider 5 has an elastic element 53 on the side near the inner support insert 1. The elastic force applied by the elastic element 53 to the slider 5 will cause the slider 5 to tend to move away from the inner support insert 1. Specifically, the elastic element 53 is a spring, and the sliding seat 51 of the slider 5 has a receiving hole on the side near the inner support insert 1. At least a portion of the elastic element 53 is disposed in the receiving hole. In other embodiments, the elastic element 53 may be a spring sheet or a spring pad.

[0062] like Figure 5 As shown, in order to ensure smooth relative sliding between the shovel base 6 and the slider 5, a plurality of oil storage grooves 61 are provided on the side of the shovel base 6 near the slider 5 and / or the side of the slider 5 near the shovel base 6.

[0063] In summary, when the fixed mold assembly and the moving mold assembly of the MIM ring product inner support shaping mechanism provided by this utility model are closed, the inner support pin drives the contact arm of the inner support insert to elastically bend and deform outward, thereby squeezing the inner hole of the MIM ring product and correcting the inner hole of the MIM ring product to conform to the preset shape and size, which effectively improves the quality of the MIM ring product. After the shaping is completed, the contact arm of the inner support insert springs back and moves away from the inner wall surface of the MIM ring product, making it convenient to remove the MIM ring product.

[0064] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A MIM (Metal Injection Molding) annular product internal support shaping mechanism, characterized in that, It includes an inner support insert, a moving mold assembly, and a fixed mold assembly for fixing the inner support insert; the inner support insert includes a fixing part and a plurality of contact arms disposed on the fixing part, the plurality of contact arms being arranged in a ring array; the moving mold assembly is provided with an inner support pin, the inner support pin being slidably abutting against the inner wall surface of the contact arm to drive the contact arm to elastically deform outward.

2. A MIM ring article internal support sizing mechanism according to claim 1, wherein, The fixed mold assembly is provided with a first pressing insert, the side of the first pressing insert near the moving mold assembly being adapted to a portion of the outer wall surface of the MIM ring article.

3. The MIM ring-shaped article internal support sizing mechanism of claim 1, wherein, The fixed mold assembly is provided with a second pressing insert, the side of the second pressing insert near the fixed mold assembly being adapted to a portion of the outer wall surface of the MIM ring article.

4. A MIM ring article internal support sizing mechanism according to claim 3, wherein, The second pressing insert has a clearance notch.

5. The MIM ring-shaped article internal support sizing mechanism of claim 1, wherein, The fixed mold assembly is provided with a plurality of sliders, which are slidable relative to the fixed mold assembly to move closer to or away from the inner support insert. The side of the slider close to the inner support insert is adapted to a portion of the outer wall surface of the MIM ring article. The moving mold assembly is provided with a shovel base for driving the sliders.

6. A MIM ring article internal support sizing mechanism according to claim 5, wherein, The fixed mold assembly is provided with a sliding groove, and the slider slides in cooperation with the sliding groove.

7. A MIM ring article internal support sizing mechanism according to claim 6, wherein, The end of the slide away from the inner support insert is connected to the outer side of the fixed mold assembly. A limiting member is provided in the slide to limit the movement stroke of the slider.

8. The MIM ring-shaped article internal support sizing mechanism of claim 5, wherein, The slider includes a sliding seat and an adapter block. The sliding seat is slidably connected to the fixed mold assembly. The adapter block is located on the side of the sliding seat near the inner support insert, and the adapter block is adapted to a portion of the outer wall surface of the MIM annular product.

9. The MIM ring-shaped article internal support sizing mechanism of claim 5, wherein, The slider has an elastic element on the side near the inner support insert.

10. The MIM ring-shaped article internal support sizing mechanism of claim 5, wherein, The shovel base has multiple oil storage tanks on the side near the slider and / or the slider has multiple oil storage tanks on the side near the shovel base.

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