Drying oven for drying metal powder

By designing a detachable support block structure and a stabilizing mechanism, the problem of reduced drying efficiency caused by damaged support blocks is solved, and convenient replacement and improved door opening and closing stability are achieved.

CN223512392UActive Publication Date: 2025-11-04SUZHOU HAILI METAL POWDER MATERIAL
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Patent Information

Application Number
CN202422655759.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-31
Publication Date
2025-11-04
Estimated Expiration
2034-10-31

AI Technical Summary

Technical Problem

In existing metal powder drying equipment, the support blocks cannot be replaced after damage, resulting in reduced drying efficiency and limited applicability.

Method used

The design incorporates a detachable support block structure that connects to the oven body via a connecting component, allowing for the replacement of damaged support blocks and enhancing door stability through a stabilizing mechanism.

Benefits of technology

It enables convenient replacement of the support block, improves drying efficiency and applicability, and enhances the stability of opening and closing the door, reducing operational risks.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a drying oven for drying metal powder, the drying oven for drying the metal powder comprises a drying oven body, a switch door and a stabilizing mechanism, a drying cavity is formed in the drying oven body, and the switch door is arranged on the drying oven body and covers the drying cavity; the stabilizing mechanism is arranged on the drying oven body and connected with the opening and closing door. A plurality of bearing mechanisms are arranged on the drying oven body, each bearing mechanism comprises a bearing block and a connecting assembly, the bearing blocks are arranged on the two opposite side walls of the drying cavity, and the bearing blocks are arranged on the drying oven body through the connecting assemblies; and the bearing blocks in the same group of bearing mechanisms are positioned in the same horizontal plane. The method has the effect of reducing the influence on the efficiency.
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Description

Technical Field

[0001] This application relates to the technical field of metal powder processing, and in particular to an oven for drying metal powder. Background Technology

[0002] The preparation of silver powder requires heating the raw materials, vaporizing the liquefied raw materials using high-pressure gas, and then condensing the vaporized raw materials into small particles using water. The material trays containing the small particles are then placed in an oven for drying, followed by sieving and other steps.

[0003] Currently, an oven for drying metal powder includes an oven body with a drying chamber formed on the oven body. Multiple sets of support components are fixedly arranged inside the drying chamber. Each set of support components includes two support blocks, which are respectively fixed on two opposite side walls of the drying chamber. Silver powder is placed on a tray, and then the tray containing silver powder is placed on the support blocks of the drying chamber, so that the tray containing silver powder is inside the drying chamber.

[0004] Because the support block is fixed, it is inconvenient to replace it when it is damaged. This will cause the support component to be unable to continue supporting the tray, reducing the number of trays that need to be placed in the drying chamber and thus reducing efficiency. Utility Model Content

[0005] To reduce the impact on efficiency, this application provides an oven for drying metal powder.

[0006] This application provides an oven for drying metal powder, which adopts the following technical solution:

[0007] An oven for drying metal powder includes an oven body, a switch door, and a stabilizing mechanism. A drying chamber is formed within the oven body. The switch door is disposed on the oven body and covers the drying chamber. The stabilizing mechanism is disposed on the oven body and connected to the switch door. Multiple sets of supporting mechanisms are provided on the oven body. Each set of supporting mechanisms includes a supporting block and a connecting component. Supporting blocks are provided on two opposite side walls of the drying chamber. The supporting blocks are mounted on the oven body via the connecting components, and the supporting blocks in the same set of supporting mechanisms are located in the same horizontal plane.

[0008] By adopting the above technical solution, when the support block is damaged, the connecting components are adjusted so that the support block is no longer connected to the oven body, and then the damaged support block is replaced; in this way, all support blocks can maintain support for the tray; and initially, the required number of support blocks can be connected to the oven body as needed; therefore, the support mechanism set in this application can not only reduce the impact on efficiency, but also improve the scope of application.

[0009] Optionally, the connecting component includes a locking block and a connecting screw. The locking block is disposed on the support block, and the oven body has a locking groove that engages with the locking block. The support block has a first through hole, the locking block has a second through hole, and the oven body has a first threaded hole that communicates with the locking groove. The connecting screw passes through the first through hole and the second through hole and is threadedly connected to the first threaded hole.

[0010] By adopting the above technical solution, the card block is first engaged with the card slot, and then the connecting screw is threaded through the first through hole and the second through hole and threaded into the first threaded hole to fix the support block on the oven body; the connection component structure is simple and easy to operate, and changes save replacement time, thereby improving efficiency.

[0011] Optionally, the support block includes a connecting plate, a support plate, and an extension plate. The connecting plate is connected to the oven body via the connecting assembly. The support plate is disposed on the connecting plate, with the end of the support plate near the switch door inclined downwards. The extension plate is disposed on the side of the support plate away from the connecting plate.

[0012] By adopting the above technical solution, when the connecting plate is connected to the oven body through the connecting assembly, the support plate will be located inside the drying chamber; the end of the support plate near the door is inclined downward, which can guide the tray, and in conjunction with the extension plate, it can reduce the risk of the support block scratching the operator's hands when the tray is placed on the support block.

[0013] Optionally, the oven body is provided with a protective component, which includes a protective strip and a mounting bolt. The protective strip abuts against the oven body, and the end of the connecting plate near the switch door abuts against the protective strip. The mounting bolt passes through the protective strip and is threadedly connected to the oven body.

[0014] By adopting the above technical solution, the connecting plate abuts against the protective strip, which can reduce the risk of the connecting plate's exposed end scratching the operator; moreover, because of the presence of the protective strip, the operator can prevent the tray from hitting the connecting plate when placing it on the support plate.

[0015] Optionally, the oven body is provided with a sealing mechanism, which includes a sealing block, a reinforcing block, a first spring, and an adjusting component. One end of the sealing block can engage with the slot, and the reinforcing block is slidably disposed on the sealing block. The oven body has a reinforcing groove communicating with the slot. The first spring connects the reinforcing block and the sealing block. The adjusting component is disposed on the sealing block and connected to the reinforcing block.

[0016] By adopting the above technical solution, more slots can be opened inside the oven body during production; however, some slots may not be used during actual use, or the position of the support block in the drying chamber may need to be adjusted later. Therefore, a sealing block is used to engage with the slots that are not connected to the support block. When the first spring is in its normal state, one end of the reinforcing block extends out of the sealing block. Therefore, before engaging the sealing block with the slot, the position of the reinforcing block is adjusted by the adjusting component so that the reinforcing block extends back into the sealing block, at which point the first spring is in a compressed state. Then, the sealing block is engaged with the slot. When the reinforcing block is aligned with the reinforcing slot, the force of the first spring restoring its elastic deformation drives the reinforcing block to move, so that the reinforcing block engages with the reinforcing slot, thereby improving the stability of the sealing block on the oven body. The sealing mechanism can reduce the amount of powder entering the slots that are not connected to the support block, thereby reducing the impact on the next installation of the support block.

[0017] Optionally, the adjustment assembly includes an adjustment shaft, an adjustment gear, and an adjustment rack. The adjustment shaft is rotatably mounted on the sealing block, and the adjustment gear is keyed to the adjustment shaft. The adjustment rack is mounted on the reinforcing block and meshes with the adjustment gear.

[0018] By adopting the above technical solution, rotating the adjusting shaft causes the adjusting gear on the adjusting shaft to move the adjusting rack, which in turn causes the reinforcing block to move; the set adjusting component has a simple structure and is easy to operate.

[0019] Optionally, the adjusting shaft is provided with a positioning assembly, which includes a rotating disk, a positioning rod, and a second spring. The rotating disk is fixedly connected to the adjusting shaft, the positioning rod is slidably disposed on the rotating disk, and the sealing block is provided with a positioning groove that engages with the positioning rod. The second spring connects the positioning rod and the rotating disk.

[0020] By adopting the above technical solution, the rotating disk can drive the adjusting shaft to rotate when it rotates, thereby moving the reinforcing block; before the sealing block is engaged with the slot, the positioning rod will be engaged with the positioning slot; when the sealing block is engaged with the slot, the positioning rod is pulled to separate the positioning rod from the positioning slot, so that the reinforcing block can be engaged with the reinforcing slot.

[0021] Optionally, the stabilizing mechanism includes a fixing block, a fixing nut, an adjusting screw, and a stabilizing block. The fixing block is disposed on the oven body, and a second threaded hole is formed on the end of the fixing block away from the oven body. The fixing nut is fixedly disposed on the fixing block. One end of the adjusting screw passes through the fixing nut and is located in the second threaded hole, and both the second threaded hole and the fixing nut are threadedly connected to the adjusting screw. The stabilizing block is disposed at the end of the adjusting screw away from the oven body and can abut against the opening and closing door.

[0022] By adopting the above technical solution, when the door covers the processing chamber, rotating the stabilizing block will cause the adjusting screw to rotate. Because the second threaded hole and the fixing nut are both threadedly connected to the adjusting screw, the adjusting screw will be displaced relative to the fixing block when it rotates. The adjusting screw will then cause the stabilizing block to be displaced relative to the fixing block, so that the stabilizing block presses against the door. Because of the locking force of the second threaded hole and the fixing nut on the adjusting screw, even if the operator accidentally touches the pressing block, the pressing block will not rotate. Therefore, the stabilizing mechanism can improve the stability of the door when it covers the drying chamber.

[0023] Optionally, the fixing block is provided with a fixing component, which includes a fixing plate and a fixing bolt. The fixing plate is located at the end of the fixing block away from the second threaded hole and abuts against the oven body. The fixing bolt passes through the fixing plate and is threadedly connected to the oven body.

[0024] By adopting the above technical solution, when the adjusting screw slips relative to the fixing nut and the second threaded hole, the fixing bolt is rotated to separate the fixing bolt from the oven body, and then a stabilizing mechanism is replaced.

[0025] Optionally, the door is provided with a stop, and the stabilizing block can abut against the stop.

[0026] By adopting the above technical solution, when the stabilizing block comes into contact with the stop block, the operator stops rotating the stabilizing block, reducing the phenomenon of the stabilizing block excessively pressing and squeezing the door open and close.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The supporting institution set up in this application can not only reduce the impact on efficiency, but also improve the scope of application;

[0029] 2. The stabilizing mechanism improves the stability of the door when it is opening and closing, covering the drying chamber. Attached Figure Description

[0030] Figure 1This is a schematic diagram of the structure of an oven used for drying metal powder in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the structure of the protective component in the embodiments of this application;

[0032] Figure 3 This is a schematic diagram of the supporting mechanism in the embodiments of this application;

[0033] Figure 4 This is a schematic diagram of the sealing mechanism in an embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the stabilizing mechanism in an embodiment of this application.

[0035] Reference numerals: 1. Oven body; 11. Drying chamber; 12. Inlet / outlet; 2. Door; 3. Stabilizing mechanism; 31. Fixing block; 32. Fixing nut; 33. Adjusting screw; 34. Stabilizing block; 35. Fixing assembly; 351. Fixing plate; 352. Fixing bolt; 36. Stop block; 4. Supporting mechanism; 41. Supporting block; 411. Connecting plate; 412. Supporting plate; 413. Extension plate; 42. Connecting assembly; 421. 422. Connecting screw; 5. Protective component; 51. Protective strip; 52. Mounting bolt; 6. Sealing mechanism; 61. Sealing block; 611. First cavity; 62. Reinforcing block; 63. First spring; 64. Adjusting component; 641. Adjusting shaft; 642. Adjusting gear; 643. Adjusting rack; 7. Positioning component; 71. Rotating disk; 711. Second cavity; 72. Positioning rod; 73. Second spring; 8. Storage tray. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0037] This application discloses an oven for drying metal powder.

[0038] refer to Figure 1 and Figure 2 An oven for drying metal powder includes an oven body 1, a drying chamber 11 formed inside the oven body 1, an inlet and outlet 12 communicating with the drying chamber 11 on the oven body 1, a hinged door 2 on the oven body 1, the door 2 being able to block the inlet and outlet 12, a stabilizing mechanism 3 connected to the door 2 on the oven body 1, and multiple sets of supporting mechanisms 4 located inside the drying chamber 11 on the oven body 1.

[0039] refer to Figure 2 and Figure 3The oven body 1 has a slot communicating with the drying chamber 11, and a first threaded hole communicating with the bottom wall of the slot. Each set of support mechanisms 4 includes two support blocks 41, which are located on opposite side walls of the drying chamber 11, and the two support blocks 41 in the same set are located in the same horizontal plane. Each support block 41 includes a connecting plate 411 that abuts against the side wall of the drying chamber 11. A support plate 412 is fixedly connected to the connecting plate 411. The length of the support plate 412 is shorter than the length of the connecting plate 411, and the end of the support plate 412 near the inlet / outlet 12 forms a rounded corner and is inclined downward. An extension plate 413 is fixedly connected to the side of the support plate 412 that is adjacent to the connecting plate 411.

[0040] A connecting component 42 is provided on the connecting plate 411. The connecting component 42 includes a locking block 421 that is fixedly connected to the connecting plate 411 and engages with the locking slot. A first through hole is provided on the connecting plate 411, and a second through hole is provided on the locking block 421 that communicates with the first through hole. A connecting screw 422 is provided on the connecting plate 411. The connecting screw 422 passes through the first through hole on the connecting plate 411 and the second through hole on the locking block 421 and is threadedly connected to the first threaded hole on the oven body 1.

[0041] refer to Figure 2 The oven body 1 is provided with a protective component 5 at the inlet and outlet 12. The protective component 5 includes a protective strip 51, which abuts against the side wall of the inlet and outlet 12. The side wall of the connecting plate 411 near the end of the inlet and outlet 12 abuts against the protective strip 51. A third through hole is provided on the protective strip 51, and a third threaded hole is provided on the oven body 1. A mounting bolt 52 is provided on the protective strip 51. The mounting bolt 52 passes through the third through hole on the protective strip 51 and is threadedly connected to the third threaded hole on the oven body 1.

[0042] refer to Figure 2 and Figure 4 A sealing mechanism 6 can be installed in the slot of the oven body 1. The sealing mechanism 6 includes a sealing block 61, one end of which has a chamfer and is engaged with the slot. The sealing block 61 has a first cavity 611 and a sliding hole communicating with the first cavity 611. A reinforcing block 62 is slidably connected within the sliding hole, one end of which is located within the first cavity 611. A reinforcing groove is provided on the oven body 1, and the end of the reinforcing block 62 away from the first cavity 611 is engaged with the reinforcing groove. A first spring 63 is installed within the first cavity 611, one end of which is connected to the reinforcing block 62 and the other end to the sealing block 61. When the first spring 63 is in its normal state, the end of the reinforcing block 62 away from the first spring 63 is outside the sealing block 61.

[0043] An adjustment assembly 64 is provided on the sealing block 61. The adjustment assembly 64 includes an adjustment shaft 641 rotatably connected to the sealing block 61. One end of the adjustment shaft 641 is located inside the first cavity 611 and the other end is located outside the sealing block 61. An adjustment gear 642 is keyed to the adjustment shaft 641 located inside the first cavity 611. An adjustment rack 643 that meshes with the adjustment gear 642 is integrally provided on the reinforcing block 62 located inside the first cavity 611.

[0044] Rotating the adjusting shaft 641 causes the adjusting gear 642 to rotate, which in turn causes the adjusting rack 643 to move, which in turn causes the reinforcing block 62 to move.

[0045] refer to Figure 2 and Figure 4 A positioning assembly 7 is provided on the adjusting shaft 641. The positioning assembly 7 includes a rotating disk 71 fixedly connected to the adjusting shaft 641, with a certain distance between the rotating disk 71 and the sealing block 61. A second cavity 711 is formed on the rotating disk 71, and a fourth through hole communicating with the second cavity 711 is formed on the rotating disk 71. A positioning rod 72 is slidably connected in the fourth through hole, with its two ends located on both sides of the rotating disk 71. A positioning groove is formed on the sealing block 61 to engage with the positioning rod 72. A second spring 73 is sleeved on the positioning rod 72 in the second cavity 711, with one end of the second spring 73 connected to the rotating disk 71 and the other end connected to the positioning rod 72. When the second spring 73 is in the normal state, the positioning rod 72 is engaged with the positioning groove, and the reinforcing block 62 is located in the sliding hole.

[0046] refer to Figure 1 and Figure 5 The oven body 1 is provided with two stabilizing mechanisms 3. The stabilizing mechanism 3 includes a fixing component 35. The fixing component 35 includes a fixing plate 351 that abuts against the oven body 1. The fixing plate 351 has a fifth through hole. The oven body 1 has a fourth threaded hole. The fixing plate 351 is provided with a fixing bolt 352. The fixing bolt 352 passes through the fifth through hole on the fixing plate 351 and is threadedly connected to the fourth threaded hole on the oven body 1.

[0047] A fixing block 31 is fixedly connected to the side of the fixing rod away from the oven body 1. A second threaded hole is provided on the side of the fixing block 31 away from the fixing plate 351. A fixing nut 32 is fixedly connected to the side of the fixing block 31 away from the fixing plate 351. An adjusting screw 33 is threadedly connected to the second threaded hole of the fixing block 31. The end of the adjusting screw 33 away from the fixing plate 351 passes through the fixing nut 32, and the fixing nut 32 is threadedly connected to the adjusting screw 33. A stabilizing block 34 is fixedly connected to the end of the adjusting screw 33 away from the fixing plate 351. The end of the stabilizing block 34 away from the adjusting screw 33 has a rounded corner. A stop block 36 is fixedly connected to the opening and closing door 2, and the stabilizing block 34 can abut against the stop block 36.

[0048] The implementation principle of an oven for drying metal powder according to an embodiment of this application is as follows: When it is necessary to dry metal powder, the operator places the metal powder on the tray 8 and then places the tray 8 on the support plate 412; then rotate the switch door 2 so that the switch door 2 covers the inlet and outlet 12; then rotate the stabilizing block 34, which drives the adjusting screw 33 to rotate. Because the adjusting screw 33 is threadedly connected to the second threaded hole and the fixing nut 32, the rotating adjusting screw 33 will drive the stabilizing block 34 to move relative to the oven body. When the stabilizing block 34 touches the stop block 36, the stabilizing block 34 presses against the switch door 2.

[0049] When it is necessary to seal the slot, the positioning rod 72 initially engages with the positioning slot on the sealing block 61, the second spring 73 is in the normal state, the end of the reinforcing block 62 away from the first cavity 611 is located in the sliding hole of the sealing block 61, and the end of the reinforcing block 62 away from the first cavity 611 is at a certain distance from the side wall of the sealing block 61; the first spring 63 is in the compressed state. The chamfered end of the sealing block 61 is inserted into the slot, and then the sealing block 61 engages with the slot. Next, the positioning rod 72 is pulled to disengage from the positioning slot, and the rotating disk 71 is rotated to misalign the positioning rod 72 with the positioning slot. The force of the first spring 63 restoring its elastic deformation will drive the reinforcing block 62 to move, so that the end of the reinforcing block 62 away from the first cavity 611 engages with the reinforcing slot. When the reinforcing block 62 moves, the adjusting rack 643 on the reinforcing block 62 drives the adjusting gear 642 to rotate, the adjusting gear 642 drives the adjusting shaft 641 to rotate, the adjusting shaft 641 drives the rotating disk 71 to rotate, and the rotating disk 71 drives the positioning rod 72 to rotate. When the reinforcing block 62 engages with the reinforcing slot, the positioning rod 72 is aligned with the positioning slot, the second spring 73 restores its elastic deformation, and the elastic force of the second spring 73 drives the positioning rod 72 to move, so that the positioning rod 72 engages with the positioning slot.

[0050] In this application, the method for drying the metal powder is hot air drying, which is prior art and will not be described in detail here.

[0051] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An oven for drying metal powder, comprising an oven body (1), a door (2), and a stabilizing mechanism (3), wherein a drying cavity (11) is formed inside the oven body (1), the door (2) is disposed on the oven body (1) and covers the drying cavity (11), and the stabilizing mechanism (3) is disposed on the oven body (1) and connected to the door (2); characterized in that, The oven body (1) is provided with multiple sets of support mechanisms (4). Each set of support mechanisms (4) includes a support block (41) and a connecting component (42). The support blocks (41) are provided on two opposite side walls of the drying chamber (11). The support blocks (41) are set on the oven body (1) through the connecting component (42), and the support blocks (41) in the same set of support mechanisms (4) are located in the same horizontal plane.

2. The drying oven for drying metal powder according to claim 1, characterized in that, The connecting component (42) includes a locking block (421) and a connecting screw (422). The locking block (421) is disposed on the support block (41). The oven body (1) has a slot that engages with the locking block (421). The support block (41) has a first through hole. The locking block (421) has a second through hole. The oven body (1) has a first threaded hole that communicates with the slot. The connecting screw (422) passes through the first through hole and the second through hole and is threadedly connected to the first threaded hole.

3. The drying oven for drying metal powder according to claim 1, characterized in that, The support block (41) includes a connecting plate (411), a support plate (412), and an extension plate (413). The connecting plate (411) is connected to the oven body (1) through the connecting assembly (42). The support plate (412) is disposed on the connecting plate (411), and the end of the support plate (412) near the switch door (2) is inclined downward. The extension plate (413) is disposed on the side of the support plate (412) away from the connecting plate (411).

4. The drying oven for drying metal powder according to claim 3, characterized in that, The oven body (1) is provided with a protective component (5), which includes a protective strip (51) and a mounting bolt (52). The protective strip (51) abuts against the oven body (1), and the end of the connecting plate (411) near the switch door (2) abuts against the protective strip (51). The mounting bolt (52) passes through the protective strip (51) and is threadedly connected to the oven body (1).

5. An oven for drying metal powder according to claim 2, characterized in that, The oven body (1) is provided with a sealing mechanism (6), which includes a sealing block (61), a reinforcing block (62), a first spring (63), and an adjusting component (64). One end of the sealing block (61) can be engaged with the slot. The reinforcing block (62) is slidably disposed on the sealing block (61). The oven body (1) is provided with a reinforcing groove communicating with the slot. The first spring (63) connects the reinforcing block (62) and the sealing block (61). The adjusting component (64) is disposed on the sealing block (61) and connected to the reinforcing block (62).

6. The drying oven for drying metal powder according to claim 5, characterized in that, The adjustment assembly (64) includes an adjustment shaft (641), an adjustment gear (642), and an adjustment rack (643). The adjustment shaft (641) is rotatably mounted on the sealing block (61), and the adjustment gear (642) is keyed to the adjustment shaft (641). The adjustment rack (643) is mounted on the reinforcing block (62) and meshes with the adjustment gear (642).

7. The drying oven for drying metal powder according to claim 6, characterized in that, The adjusting shaft (641) is provided with a positioning component (7), which includes a rotating disk (71), a positioning rod (72), and a second spring (73). The rotating disk (71) is fixedly connected to the adjusting shaft (641), and the positioning rod (72) is slidably disposed on the rotating disk (71). The sealing block (61) is provided with a positioning groove that engages with the positioning rod (72). The second spring (73) connects the positioning rod (72) and the rotating disk (71).

8. The drying oven for drying metal powder according to claim 1, characterized in that, The stabilizing mechanism (3) includes a fixing block (31), a fixing nut (32), an adjusting screw (33), and a stabilizing block (34). The fixing block (31) is disposed on the oven body (1), and a second threaded hole is provided on the end of the fixing block (31) away from the oven body (1). The fixing nut (32) is fixedly disposed on the fixing block (31). One end of the adjusting screw (33) passes through the fixing nut (32) and is located in the second threaded hole, and the second threaded hole and the fixing nut (32) are both threadedly connected to the adjusting screw (33). The stabilizing block (34) is disposed on the end of the adjusting screw (33) away from the oven body (1) and can abut against the opening and closing door (2).

9. An oven for drying metal powder according to claim 8, characterized in that, The fixing block (31) is provided with a fixing component (35), which includes a fixing plate (351) and a fixing bolt (352). The fixing plate (351) is located at the end of the fixing block (31) away from the second threaded hole, and the fixing plate (351) abuts against the oven body (1). The fixing bolt (352) passes through the fixing plate (351) and is threadedly connected to the oven body (1).

10. An oven for drying metal powder according to claim 8, characterized in that, The switch door (2) is provided with a stop (36), and the stabilizing block (34) can abut against the stop (36).