Powder injection molding and vacuum thermal desorption sintering integrated furnace

Abstract

The utility model discloses a powder injection molding and vacuum thermal desorption sintering integrated furnace, which belongs to the technical field of powder injection molding and sintering, and comprises a vacuum thermal desorption sintering integrated furnace main body and a furnace cover, the top of the vacuum thermal desorption sintering integrated furnace main body is fixedly connected with a mounting frame; according to the powder injection molding vacuum thermal desorption sintering integrated furnace, when a furnace cover is closed, an arc-shaped driving block on a connecting plate is driven to enter a mounting frame, the arc-shaped driving block abuts against a sliding plate, the sliding plate slides towards the inner side of the mounting frame to compress a rectangular air bag block, and gas in the rectangular air bag block is conveyed to an inflation nozzle through a gas conveying pipe; the furnace cover enters the expansion ring, so that the expansion ring expands to wrap the joint of the furnace cover and the vacuum thermal desorption and sintering integrated furnace, the furnace cover and the vacuum thermal desorption and sintering integrated furnace are sealed, poor sealing performance caused by improper operation when the furnace cover is closed can be prevented, and a degreased and sintered product can have good performance.

Description

Technical Field

[0001] The utility model relates to the technical field of powder injection molding and sintering, in particular to a powder injection molding vacuum heat removal and sintering integrated furnace. Background Art

[0002] Metal Injection Molding (MIM) is a manufacturing technique that combines metal powder with polymer. In this process, metal is formed into a fine, spherical powder and mixed with a polymer to form an injectable feedstock. The feedstock is then heated, melted, and injected into a mold. Heat and pressure decompose or volatilize the polymer, leaving behind the metal powder's shape. Finally, a vacuum heat-sintering process is used to sinter the metal powder into a dense solid.

[0003] A search revealed a Chinese patent with the authorization number CN 213195625 U, which discloses a novel integrated furnace for metal powder injection molding (MIM) debinding and sintering. The furnace comprises a base, a furnace body mounted on the base, and a wax storage system, a catalytic debinding system, an exhaust combustion system, a vacuum system, and a cooling fan system connected to the furnace body. The furnace body is provided with a wax storage system at the bottom, a catalytic debinding system at the left side, a vacuum system at the right side, an exhaust combustion system at the top, and a cooling fan system at the front. The furnace body comprises a housing, a vaporizer within the furnace body, a furnace liner, an outer furnace liner, and a furnace cover. The aforementioned patent has the following drawbacks: Existing vacuum thermal debinding furnaces typically use a vacuum pump to remove air from the furnace when the cover is closed to prevent oxidation of the metal powder by air entering during thermal debinding and sintering. However, the existing furnace cover is typically sealed with a flange when closed. This sealing method, if improperly operated, can easily leak, allowing air to enter, thus affecting the MIM thermal debinding and sintering process. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that the furnace cover of a heat-stripping and sintering integrated furnace is easily improperly operated when closed, thereby proposing a powder injection molding vacuum heat-stripping and sintering integrated furnace.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A powder injection molding vacuum heat removal and sintering integrated furnace includes a vacuum heat removal and sintering integrated furnace body and a furnace cover, the top of the vacuum heat removal and sintering integrated furnace body is fixedly connected to a mounting frame, and also includes: a rectangular air bag block, fixedly connected to the inner side of the mounting frame; a sliding plate, slidably connected to the inner walls on both sides of the mounting frame; an expansion ring, fixedly connected to the outer surface of the vacuum heat removal and sintering integrated furnace body, the surface of the expansion ring is fixedly connected to an inflation nozzle; an air supply pipe, arranged between the rectangular air bag block and the inflation nozzle; a connecting plate, fixedly connected to the top of the furnace cover, the top of the connecting plate is fixedly connected to an arc-shaped driving block.

[0007] Preferably, sliding grooves are provided on the inner walls on both sides of the installation frame, and both ends of the sliding plate are slidably connected in the sliding grooves of the installation frame. A circular groove is provided on the inner wall of the sliding groove of the installation frame close to the outer surface of the sliding plate.

[0008] Preferably, a guide rod is slidably connected in the circular groove on the slide groove of the installation frame, the guide rod passes through the sliding plate and is slidably connected to the sliding plate, the end of the guide rod away from the sliding plate is fixedly connected to the inner wall of the installation frame, and a first spring is sleeved on the guide rod.

[0009] Preferably, one end of the first spring is fixedly connected to the inner wall of the sliding groove of the installation frame, the other end of the first spring is fixedly connected to the sliding plate, and the air pipe passes through the installation frame and is fixedly connected to the installation frame.

[0010] Preferably, a limiting groove is provided on the surface of the arc-shaped driving block, a circular rod passes through the upper surface of the mounting frame and is slidably connected to the mounting frame, and a limiting block adapted to the limiting groove of the arc-shaped driving block is fixedly connected to the bottom of the circular rod.

[0011] Preferably, a second spring is sleeved on the circular rod close to the interior of the installation frame, one end of the second spring is fixedly connected to the top inner wall of the installation frame, and the other end of the second spring is fixedly connected to the limit block.

[0012] Preferably, a toggle plate is hingedly connected to the top of the circular rod, and the toggle plate is rotatably connected to the top surface of the mounting frame.

[0013] Preferably, the arc-shaped driving block is slidably connected to the inner wall of the installation frame.

[0014] Compared with the existing technology, the utility model provides a powder injection molding vacuum heat removal and sintering integrated furnace, which has the following beneficial effects:

[0015] 1. The powder injection molding vacuum heat stripping and sintering integrated furnace drives the arc-shaped driving block on the connecting plate into the installation frame when the furnace cover is closed. The arc-shaped driving block contacts the sliding plate, causing the sliding plate to slide toward the inner side of the installation frame to compress the rectangular air bag block, so that the gas in the rectangular air bag block is transported to the inflation nozzle through the gas pipe, and then enters the expansion ring, so that the expansion ring expands and wraps the connection between the furnace cover and the vacuum heat stripping and sintering integrated furnace, thereby sealing the furnace cover and the vacuum heat stripping and sintering integrated furnace, preventing poor sealing due to improper operation when the furnace cover is closed, and thus ensuring that the degreased product has good performance.

[0016] 2. In the powder injection molding vacuum heat removal and sintering integrated furnace, when the furnace cover is closed, the arc driving block on the connecting plate is driven into the installation frame, and the limit block enters the limit groove of the arc driving block to limit the arc driving block, thereby limiting the position between the furnace cover and the main body of the vacuum heat removal and sintering integrated furnace, making the sliding plate more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a powder injection molding vacuum thermal desintering and sintering integrated furnace proposed in the utility model;

[0018] Figure 2 This utility model proposes a powder injection molding vacuum heat removal and sintering integrated furnace Figure 1 Schematic diagram of the structure of part A;

[0019] Figure 3 This is a schematic diagram of the front structure of a powder injection molding vacuum thermal desintering and sintering integrated furnace proposed by the present invention;

[0020] Figure 4 This utility model proposes a powder injection molding vacuum heat removal and sintering integrated furnace Figure 3 Schematic diagram of the structure of B;

[0021] Figure 5 This is a schematic cross-sectional structure diagram of the furnace cover and the top of the mounting frame in a powder injection molding vacuum thermal desintering and sintering integrated furnace proposed by the present invention;

[0022] Figure 6 This utility model proposes a powder injection molding vacuum heat removal and sintering integrated furnace Figure 5 Schematic diagram of the structure of C.

[0023] In the figure: 1. Vacuum thermal desintering and sintering integrated furnace body; 2. Furnace cover; 3. Mounting frame; 4. Rectangular airbag block; 5. Sliding plate; 6. Expansion ring; 7. Inflating nozzle; 8. Air pipe; 9. Connecting plate; 10. Arc-shaped driving block; 11. Guide rod; 12. First spring; 13. Round rod; 14. Limit block; 15. Second spring; 16. Toggle plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0026] Example 1: Reference Figures 1-6 A powder injection molding vacuum heat removal and sintering integrated furnace includes a vacuum heat removal and sintering integrated furnace body 1 and a furnace cover 2. The top of the vacuum heat removal and sintering integrated furnace body 1 is fixedly connected to a mounting frame 3, and also includes: a rectangular air bag block 4, fixedly connected to the inner side of the mounting frame 3; a sliding plate 5, slidingly connected to the inner walls on both sides of the mounting frame 3; an expansion ring 6, fixedly connected to the outer surface of the vacuum heat removal and sintering integrated furnace body 1, and an inflation nozzle 7 is fixedly connected to the surface of the expansion ring 6; an air supply pipe 8, arranged between the rectangular air bag block 4 and the inflation nozzle 7; a connecting plate 9, fixedly connected to the top of the furnace cover 2, and an arc-shaped driving block 10 is fixedly connected to the top of the connecting plate 9.

[0027] In the present invention, when the furnace cover 2 is closed, the arc-shaped driving block 10 on the connecting plate 9 is driven to enter the installation frame 3, and the arc-shaped driving block 10 contacts the sliding plate 5, so that the sliding plate 5 slides toward the inner side of the installation frame 3 to compress the rectangular air bag block 4, so that the gas in the rectangular air bag block 4 is transported to the inflation nozzle 7 through the gas pipe 8, and then enters the expansion ring 6, so that the expansion ring 6 expands and wraps the connection between the furnace cover 2 and the vacuum thermal desintering and sintering integrated furnace body 1, thereby sealing the furnace cover 2 and the vacuum thermal desintering and sintering integrated furnace body 1, which can prevent poor sealing due to improper operation when the furnace cover 2 is closed, so that the degreased product can have good performance.

[0028] Example 2: Reference Figures 1-6 , which is basically the same as the first embodiment, and further, a slide groove is opened on the inner walls on both sides of the mounting frame 3, and the two ends of the sliding plate 5 are slidably connected in the slide groove of the mounting frame 3, and a circular groove is opened on the inner wall of the slide groove of the mounting frame 3 near the outer surface of the sliding plate 5.

[0029] In the present invention, the sliding groove of the mounting frame 3 can assist the sliding plate 5 in sliding, which helps to make the sliding plate 5 slide more stably.

[0030] A guide rod 11 is slidably connected in the circular groove on the slide groove of the mounting frame 3. The guide rod 11 passes through the sliding plate 5 and is slidably connected to the sliding plate 5. The end of the guide rod 11 away from the sliding plate 5 is fixedly connected to the inner wall of the mounting frame 3. A first spring 12 is sleeved on the guide rod 11.

[0031] One end of the first spring 12 is fixedly connected to the inner wall of the sliding groove of the installation frame 3 , and the other end of the first spring 12 is fixedly connected to the sliding plate 5 . The air pipe 8 passes through the installation frame 3 and is fixedly connected to the installation frame 3 .

[0032] In the present invention, when the sliding plate 5 slides, it can be guided by the guide rod 11 and the first spring 12 can be compressed at the same time. When the furnace cover 2 is opened, the first spring 12 can assist the sliding plate 5 to automatically reset.

[0033] Example 3: Reference Figures 1-6 , which is basically the same as the first embodiment, and further, a limiting groove is provided on the surface of the arc driving block 10, a circular rod 13 passes through the upper surface of the mounting frame 3 and is slidably connected to the mounting frame 3, and a limiting block 14 adapted to the limiting groove of the arc driving block 10 is fixedly connected to the bottom of the circular rod 13.

[0034] A second spring 15 is sleeved on the circular rod 13 near the interior of the installation frame 3 . One end of the second spring 15 is fixedly connected to the top inner wall of the installation frame 3 , and the other end of the second spring 15 is fixedly connected to the limit block 14 .

[0035] In the present invention, when the furnace cover 2 is closed, the arc-shaped driving block 10 on the connecting plate 9 is driven to enter the installation frame 3, and the arc surface of the arc-shaped driving block 10 can slide over the limit block 14. The limit block 14 will resist the circular rod 13 and compress the second spring 15 upward. Then, when the arc-shaped driving block 10 completely enters the installation frame 3, the downward elastic force of the second spring 15 causes the limit block 14 to enter the limit groove of the arc-shaped driving block 10 to limit the arc-shaped driving block 10, thereby limiting the position between the furnace cover 2 and the vacuum thermal desintering and sintering integrated furnace body 1, so that the stability of the sliding plate 5 is better.

[0036] A toggle plate 16 is hingedly connected to the top of the circular rod 13 , and the toggle plate 16 is rotatably connected to the top surface of the mounting frame 3 .

[0037] In the utility model, when the furnace cover 2 needs to be opened, the circular rod 13 is driven upward by rotating the toggle plate 16, thereby driving the bottom limit block 14 upward to disengage from the limit groove of the arc-shaped driving block 10, and then the furnace cover 2 can be opened, and then the sliding plate 5 is automatically reset under the action of the first spring 12, and the rectangular air bag block 4 is no longer squeezed, so that the gas in the expansion ring 6 returns to the rectangular air bag block 4, so that the expansion ring 6 no longer seals between the furnace cover 2 and the vacuum thermal desintering and sintering integrated furnace body 1.

[0038] The arc-shaped driving block 10 is slidably connected to the inner wall of the mounting frame 3 .

[0039] In the present invention, when the arc-shaped driving block 10 enters the installation frame 3, the installation frame 3 can guide and slide towards it.

[0040] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A powder injection molding vacuum heat stripping and sintering integrated furnace, comprising a vacuum heat stripping and sintering integrated furnace body (1) and a furnace cover (2), characterized in that: The top of the vacuum thermal desintering and sintering integrated furnace body (1) is fixedly connected to a mounting frame (3), and further comprises: A rectangular airbag block (4) fixedly connected to the inner side of the installation frame (3); A sliding plate (5) slidably connected to the inner walls on both sides of the installation frame (3); An expansion ring (6) is fixedly connected to the outer surface of the vacuum thermal desintering and sintering integrated furnace body (1), and an air charging nozzle (7) is fixedly connected to the surface of the expansion ring (6); An air delivery pipe (8) is arranged between the rectangular air bag block (4) and the inflation nozzle (7); A connecting plate (9) is fixedly connected to the top of the furnace cover (2), and an arc-shaped driving block (10) is fixedly connected to the top of the connecting plate (9).

2. A powder injection molding vacuum thermal desintering integrated furnace according to claim 1, characterized in that: Slide grooves are provided on the inner walls on both sides of the installation frame (3), and the two ends of the sliding plate (5) are slidably connected in the slide grooves of the installation frame (3). A circular groove is provided on the inner wall of the slide groove of the installation frame (3) close to the outer surface of the sliding plate (5).

3. The powder injection molding vacuum heat removal and sintering integrated furnace according to claim 1, characterized in that: A guide rod (11) is slidably connected in the circular groove on the sliding groove of the installation frame (3); the guide rod (11) passes through the sliding plate (5) and is slidably connected to the sliding plate (5); one end of the guide rod (11) away from the sliding plate (5) is fixedly connected to the inner wall of the installation frame (3); and a first spring (12) is sleeved on the guide rod (11).

4. The powder injection molding vacuum heat removal and sintering integrated furnace according to claim 3, characterized in that: One end of the first spring (12) is fixedly connected to the inner wall of the slide groove of the installation frame (3), the other end of the first spring (12) is fixedly connected to the sliding plate (5), and the air supply pipe (8) passes through the installation frame (3) and is fixedly connected to the installation frame (3).

5. The powder injection molding vacuum heat removal and sintering integrated furnace according to claim 1, characterized in that: A limiting groove is provided on the surface of the arc-shaped driving block (10); a circular rod (13) passes through the upper surface of the installation frame (3) and is slidably connected to the installation frame (3); a limiting block (14) adapted to the limiting groove of the arc-shaped driving block (10) is fixedly connected to the bottom of the circular rod (13).

6. The powder injection molding vacuum heat removal and sintering integrated furnace according to claim 5, characterized in that: A second spring (15) is sleeved on the circular rod (13) near the inside of the installation frame (3); one end of the second spring (15) is fixedly connected to the top inner wall of the installation frame (3); and the other end of the second spring (15) is fixedly connected to the limit block (14).

7. The powder injection molding vacuum heat removal and sintering integrated furnace according to claim 5, characterized in that: A toggle plate (16) is hingedly connected to the top of the circular rod (13), and the toggle plate (16) is rotatably connected to the top surface of the mounting frame (3).

8. The powder injection molding vacuum heat removal and sintering integrated furnace according to claim 1, characterized in that: The arc-shaped driving block (10) is slidably connected to the inner wall of the installation frame (3).

Images