Powder metallurgy sintering furnace

Abstract

The utility model relates to the technical field of powder metallurgy, and particularly discloses a powder metallurgy sintering furnace which comprises a furnace body, a plurality of placing trays are fixedly connected to the inner wall of the furnace body, a furnace door is arranged at the front end of the furnace body, a cooling mechanism is arranged at the rear end of the furnace body, and the cooling mechanism is used for cooling powder metallurgy workpieces sintered in the furnace body. The cooling mechanism comprises a plurality of air inlet covers fixedly connected to the rear end of the furnace body in an inserted mode, the number of the air inlet covers is consistent with that of the containing discs, the air inlet covers are located above the containing discs, the cooling mechanism further comprises an air inlet box fixedly connected to the rear end of the furnace body, and an air inlet pipe is fixedly connected to the left side of the air inlet box in an inserted mode. Through the cooperation of the structure, cold air with low temperature circulates at each placing disc, and the air guide plate swings back and forth to achieve the purpose of air sweeping, so that workpieces on each placing disc can be uniformly cooled, the cooling effect of the workpieces is good, and the cooling rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy, in particular to a powder metallurgy sintering furnace. Background Art

[0002] Powder metallurgy is the process of preparing metal powder or using metal powder as raw material, forming and sintering, and manufacturing various types of products. The workpiece after powder metallurgy stamping generally needs to be placed in a sintering furnace for sintering and hardening to achieve the purpose of drying the slurry on the silicon wafer or removing the organic components in the slurry or completing the sintering of the aluminum back field and gate line.

[0003] After the workpiece is processed, it cannot be cooled and needs to be cooled naturally, which results in a low cooling rate, a long processing cycle and affects the processing efficiency.

[0004] For example, the "powder metallurgy sintering furnace" with the application publication number "CN116000295A" sucks in external air through the air inlet through the first fan, and transmits it to the air distribution duct through the pipeline, and then blows the external air evenly into the interior of the sintering furnace body through the air distribution duct. At the same time, the second fan works to make the gas inside the sintering furnace body sucked out through the exhaust port and the pipeline, so as to realize the heat exchange inside the sintering furnace body, thereby accelerating the cooling of the sintered workpiece;

[0005] Although the above scheme can allow external air to enter the furnace body and discharge the gas in the furnace body through the second fan, it is convenient to lower the air temperature in the furnace, thereby facilitating rapid cooling of the workpieces in the furnace body, but in actual use, the air with lower external temperature enters the furnace body from the top of the furnace body, and its temperature will become higher after passing through the workpiece at the top, resulting in poor cooling effect on the workpiece at the bottom, affecting the cooling efficiency. Summary of the invention

[0006] The purpose of the utility model is to provide a powder metallurgy sintering furnace, which can ensure that each placement plate has cold air circulating at a relatively low temperature, and cooperate with the wind guide plate to swing back and forth to achieve the purpose of sweeping the air, so that the workpieces on each placement plate can be cooled more evenly, so that the cooling effect of the workpieces is good, and the cooling rate is increased, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a powder metallurgy sintering furnace, comprising a furnace body, the inner wall of which is fixedly connected to a plurality of placement plates, a furnace door is provided at the front end of the furnace body, and a cooling mechanism is provided at the rear end of the furnace body. The cooling mechanism is used to cool the powder metallurgy workpiece after sintering in the furnace body and accelerate the cooling rate of the powder metallurgy workpiece. The cooling mechanism comprises a plurality of air inlet hoods fixedly plugged into the rear end of the furnace body, the number of the air inlet hoods is consistent with the placement plates, and the air inlet hoods are located above the placement plates.

[0008] Preferably, the cooling mechanism also includes an air inlet box fixedly connected to the rear end of the furnace body, an air inlet pipe is fixedly plugged into the left side of the air inlet box, a branch pipe is fixedly plugged into the rear end of the air inlet box, and the end of the branch pipe away from the air inlet box is fixedly plugged into the air inlet cover.

[0009] Preferably, a first motor is disposed inside the air inlet box, and a fan blade is fixedly connected to an output shaft of the first motor.

[0010] Preferably, the inner walls of several of the air inlet hoods are rotatably connected to screws, the outer walls of the screws are threadedly connected to several moving blocks, the front ends of the moving blocks are rotatably connected to air guide plates, the middle part of the air guide plates is fixedly connected to connecting rods, and the top and bottom ends of the connecting rods are rotatably connected to the air inlet hoods.

[0011] Preferably, the right sides of several of the screw rods pass through the air inlet hood and are fixedly connected to the first sprocket, the rear end of the furnace body is fixedly connected to a connecting block, the side of the connecting block close to the air inlet hood is fixedly connected to a second motor, the output shaft of the second motor is fixedly connected to a second sprocket, and a chain is arranged between the second sprocket and the first sprocket.

[0012] Preferably, a water cooling mechanism is provided inside the air inlet box, and the water cooling mechanism is used to cool the air inside the air inlet box.

[0013] Preferably, the water cooling mechanism comprises a water containing frame fixedly connected to the inside of the air inlet box, and both ends of the water containing frame penetrate the air inlet box and are fixedly plugged with water pipes.

[0014] Preferably, the water containing frame is in a surrounding shape, and a plurality of ventilation slots are provided inside the water containing frame, and the ventilation slots are staggeredly provided inside the water containing frame.

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

[0016] 1. Since each placement tray is equipped with an air inlet cover, each placement tray has cold air flowing at a lower temperature, and the wind guide plate swings back and forth to sweep the air, so that the workpieces on each placement tray can be cooled more evenly, so that the cooling effect of the workpieces is good and the cooling rate is increased;

[0017] 2. The design of ventilation slots staggered in the water-containing frame can increase the distance of air circulation in the air inlet box, improve the effect of air cooling, make the air temperature for cooling the workpiece lower, and further improve the cooling rate of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is the overall structural view of the utility model;

[0020] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0021] Figure 3 For the utility model Figure 2 A magnified image of point A;

[0022] Figure 4 It is a front cross-sectional structural schematic diagram of the utility model;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the air inlet box of the utility model;

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of the air inlet cover of the utility model.

[0025] Description of reference numerals:

[0026] 1. Furnace body; 2. Placement plate; 3. Cooling mechanism; 31. Air inlet hood; 32. Air inlet box; 33. Air inlet pipe; 34. Branch pipe; 35. First motor; 36. Fan blade; 37. Screw; 38. Moving block; 39. Air guide plate; 310. Connecting rod; 311. First sprocket; 312. Connecting block; 313. Second sprocket; 314. Chain; 315. Second motor; 4. Water cooling mechanism; 41. Water containing frame; 42. Water pipe; 43. Ventilation slot; 5. Furnace door. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figures 1 to 6 The utility model provides a technical solution: a powder metallurgy sintering furnace, including a furnace body 1, a plurality of placement trays 2 are fixedly connected to the inner wall of the furnace body 1, a furnace door 5 is arranged at the front end of the furnace body 1, and a cooling mechanism 3 is arranged at the rear end of the furnace body 1. The cooling mechanism 3 is used to cool the powder metallurgy workpiece after sintering the furnace body 1, and accelerate the cooling rate of the powder metallurgy workpiece. The cooling mechanism 3 includes a plurality of air inlet hoods 31 fixedly plugged at the rear end of the furnace body 1, and the number of the air inlet hoods 31 is consistent with the placement trays 2, and the air inlet hoods 31 are above the placement trays 2. The cooling mechanism 3 also includes an air inlet box 32 fixedly connected to the rear end of the furnace body 1, and an air inlet pipe 33 is fixedly plugged on the left side of the air inlet box 32. A branch pipe 34 is fixedly plugged at the rear end of the air inlet box 32, and the end of the branch pipe 34 away from the air inlet box 32 is fixedly plugged with the air inlet hood 31. A first motor 35 is provided inside 32, and the output shaft of the first motor 35 is fixedly connected to the fan blade 36, the inner walls of several air inlet hoods 31 are rotatably connected to screws 37, the outer walls of the screws 37 are threadedly connected to several moving blocks 38, the front end of the moving block 38 is rotatably connected to an air guide plate 39, the middle part of the air guide plate 39 is fixedly connected to a connecting rod 310, the top and bottom ends of the connecting rod 310 are rotatably connected to the air inlet hood 31, the right side of the screw 37 passes through the air inlet hood 31 and is fixedly connected to a first sprocket 311, the rear end of the furnace body 1 is fixedly connected to a connecting block 312, the side of the connecting block 312 close to the air inlet hood 31 is fixedly connected to a second motor 315, the output shaft of the second motor 315 is fixedly connected to a second sprocket 313, and a chain 314 is provided between the second sprocket 313 and the first sprocket 311.

[0029] By adopting the above technical scheme, the furnace door 5 is connected to the furnace body 1 through a door hinge, and the inner wall of the furnace body 1 is fixedly connected with a heating component, and the heating component can be an electric heating plate or an electric heating rod. When the powder metallurgy workpiece needs to be sintered, the furnace door 5 is opened, and the component to be sintered is placed on the top of the placement tray 2, and then the furnace door 5 is closed, and the heating component is powered on for heating, so as to facilitate the sintering of the workpiece. After the sintering is completed, the furnace door 5 is opened, and the workpiece is cooled by the cooling mechanism 3 to increase the cooling rate of the workpiece, and a valve can be installed at the branch pipe 34 to avoid heat loss during sintering of the workpiece. When cooling, the valve at the branch pipe 34 is opened, and the output shaft of the first motor 35 is rotated to make the fan blade 36 rotate, so that the air in the air inlet box 32 flows. At this time, the air enters the interior of the air inlet box 32 from the air inlet pipe 33, and enters the air inlet hood 31 through the branch pipe 34, and then the wind The air blows toward the workpiece, so that the space is cooled quickly. The second sprocket 313 and the first sprockets 311 are transmitted through the chain 314. At this time, the output shaft of the second motor 315 rotates. Under the action of the second sprocket 313, the first sprocket 311 and the chain 314, the screw 37 can be rotated. Under the action of the threaded connection, the moving block 38 is moved, so that the air guide plate 39 rotates. When the angle of the air guide plate 39 changes, the direction of the wind can be changed. The second motor 315 can adopt a servo motor. Through the reciprocating rotation of its output shaft, the air guide plate 39 can swing back and forth, thereby achieving the purpose of sweeping the wind. Since each placement tray 2 is provided with an air inlet hood 31, each placement tray 2 has cold air with a lower temperature circulating, and the air guide plate 39 swings back and forth to achieve the purpose of sweeping the wind, so that the workpiece on each placement tray 2 can be cooled more evenly, so that the cooling effect of the workpiece is good and the cooling rate is improved.

[0030] Specifically, Figure 5 As shown, a water cooling mechanism 4 is provided inside the air inlet box 32, and the water cooling mechanism 4 is used to cool the air inside the air inlet box 32. The water cooling mechanism 4 includes a water containing frame 41 fixedly connected to the inside of the air inlet box 32, and both ends of the water containing frame 41 penetrate the air inlet box 32 and are fixedly plugged with water pipes 42. The water containing frame 41 is in a surrounding shape, and a plurality of ventilation grooves 43 are opened inside the water containing frame 41. The ventilation grooves 43 are staggered in the water containing frame 41, and the second motor 315 is fixedly connected to the water containing frame 41.

[0031] By adopting the above technical solution, when cooling is performed, cold water can be introduced from one of the water pipes 42, so that the cold water enters the water containing frame 41, and the water in the water containing frame 41 flows out from the other water pipe 42. The water in the water containing frame 41 exchanges heat with the air to cool the air entering the air inlet box 32. After the air enters the air inlet box 32, the air passes through the ventilation slots 43. The design of the ventilation slots 43 being staggered in the water containing frame 41 can increase the distance that the air circulates in the air inlet box 32, improve the effect of cooling the air, make the air temperature for cooling the workpiece lower, and further improve the cooling rate of the workpiece.

[0032] Working principle: Place the component to be sintered on the top of the placing tray 2, then close the furnace door 5, and power on the heating component for heating, so as to facilitate the sintering of the workpiece. After the sintering is completed, open the furnace door 5 and cool the workpiece through the cooling mechanism 3. During cooling, the output shaft of the first motor 35 rotates, causing the fan blades 36 to rotate, thereby causing the air in the air inlet box 32 to flow, and the air enters the interior of the air inlet box 32 from the air inlet pipe 33. One of the water pipes 42 passes cold water, causing the cold water to enter the water containing frame 41. The water in the water containing frame 41 exchanges heat with the air, so as to enter the air inlet box. The air inside 32 is cooled and enters the air inlet hood 31 through the branch pipe 34, and then the wind blows toward the workpiece, so that the space is cooled quickly. The second sprocket 313 and the plurality of first sprockets 311 are transmitted through the chain 314. At this time, the output shaft of the second motor 315 rotates. Under the action of the second sprocket 313, the first sprocket 311 and the chain 314, the screw 37 can be rotated, and the moving block 38 can be moved under the action of the threaded connection, so that the air guide plate 39 can be rotated. When the angle of the air guide plate 39 changes, the direction of the wind can be changed, thereby achieving the purpose of sweeping the wind.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A powder metallurgy sintering furnace, comprising a furnace body (1), characterized in that: A plurality of placement plates (2) are fixedly connected to the inner wall of the furnace body (1), and a furnace door (5) is provided at the front end of the furnace body (1); A cooling mechanism (3) is provided at the rear end of the furnace body (1), and the cooling mechanism (3) is used to cool the powder metallurgy workpiece after sintering in the furnace body (1), thereby accelerating the cooling rate of the powder metallurgy workpiece; The cooling mechanism (3) comprises a plurality of air inlet covers (31) fixedly plugged into the rear end of the furnace body (1), the number of the air inlet covers (31) being the same as the number of the placement tray (2), and the air inlet covers (31) being located above the placement tray (2); The cooling mechanism (3) further comprises an air inlet box (32) fixedly connected to the rear end of the furnace body (1), an air inlet pipe (33) being fixedly plugged into the left side of the air inlet box (32), a branch pipe (34) being fixedly plugged into the rear end of the air inlet box (32), and an end of the branch pipe (34) away from the air inlet box (32) being fixedly plugged into the air inlet cover (31); A first motor (35) is disposed inside the air inlet box (32), and a fan blade (36) is fixedly connected to an output shaft of the first motor (35); The inner walls of the plurality of air inlet covers (31) are rotatably connected to screw rods (37), the outer walls of the screw rods (37) are threadedly connected to a plurality of moving blocks (38), the front ends of the moving blocks (38) are rotatably connected to an air guide plate (39), the middle part of the air guide plate (39) is fixedly connected to a connecting rod (310), and the top and bottom ends of the connecting rod (310) are rotatably connected to the air inlet cover (31).

2. A powder metallurgy sintering furnace according to claim 1, characterized in that: The right sides of the plurality of screw rods (37) pass through the air inlet cover (31) and are fixedly connected to the first sprocket (311); the rear end of the furnace body (1) is fixedly connected to a connecting block (312); a side of the connecting block (312) close to the air inlet cover (31) is fixedly connected to a second motor (315); an output shaft of the second motor (315) is fixedly connected to a second sprocket (313); and a chain (314) is provided between the second sprocket (313) and the first sprocket (311).

3. A powder metallurgy sintering furnace according to claim 2, characterized in that: A water cooling mechanism (4) is provided inside the air inlet box (32), and the water cooling mechanism (4) is used to cool the air inside the air inlet box (32).

4. A powder metallurgy sintering furnace according to claim 3, characterized in that: The water cooling mechanism (4) comprises a water containing frame (41) fixedly connected to the inside of the air inlet box (32), and both ends of the water containing frame (41) penetrate the air inlet box (32) and are fixedly plugged with water pipes (42).

5. A powder metallurgy sintering furnace according to claim 4, characterized in that: The water containing frame (41) is in a surrounding shape, and a plurality of ventilation slots (43) are provided inside the water containing frame (41). The ventilation slots (43) are staggeredly provided inside the water containing frame (41).

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