Metal printing heat treatment equipment

Abstract

The utility model discloses metal printing heat treatment equipment. The metal printing heat treatment equipment comprises a feeding mechanism, a forming mechanism, a discharging mechanism and an air exchange mechanism. The feeding mechanism comprises a feeding bin and feeding equipment. And the feeding equipment is arranged in the feeding bin. The forming mechanism comprises a forming bin and printing equipment; the printing equipment is arranged in the forming bin; the forming bin and the feeding bin are communicated in a sealed mode through a feeding sealing door assembly. The discharging mechanism comprises a discharging bin, discharging equipment and heat treatment equipment. The discharging equipment and the heat treatment equipment are both arranged in the discharging bin; the discharging bin communicates with the forming bin in a sealed mode through a discharging sealing door assembly. The air exchange mechanism comprises an upper bin air exchange assembly and a lower bin air exchange assembly. The feeding bin ventilation assembly communicates with the feeding bin and is used for conducting gas washing on the feeding bin. The discharging bin ventilation assembly is communicated with the discharging bin, gas washing is conducted on the discharging bin, finished product materials are saved, the vacuumizing time is shortened, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of product processing, in particular to a metal printing heat treatment equipment. BACKGROUND

[0002] Currently, inert gas needs to be filled into the forming bin to reduce the oxygen content during the metal 3D printing process. The gas needs to be washed every time the printing is performed, which consumes a long time and has low production efficiency. The printed parts usually need to be heat treated to relieve stress. During the heat treatment process, vacuum pumping needs to be performed on the easily oxidized materials to reduce the oxygen content. Currently, the printing equipment and the heat treatment equipment operate independently, which needs to arrange the material flow and perform vacuum pumping before heat treatment, and the efficiency is low. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a metal printing heat treatment equipment which can improve the production efficiency.

[0004] The embodiment of the present application provides a printing equipment, which comprises a feeding mechanism, a forming mechanism, a discharging mechanism and a gas exchange mechanism. The feeding mechanism comprises a feeding bin and a feeding device; the feeding device is arranged in the feeding bin. The forming mechanism comprises a forming bin and a printing device; the printing device is arranged in the forming bin; the forming bin is in sealed communication with the feeding bin through a feeding sealing door assembly. The discharging mechanism comprises a discharging bin, a discharging device and a heat treatment device; the discharging device and the heat treatment device are both arranged in the discharging bin; the discharging bin is in sealed communication with the forming bin through a discharging sealing door assembly; the gas exchange mechanism comprises a feeding bin gas exchange assembly and a discharging bin gas exchange assembly; the feeding bin gas exchange assembly communicates with the feeding bin and is used for washing the feeding bin; the discharging bin gas exchange assembly communicates with the discharging bin and is used for washing the discharging bin.

[0005] The present application controls the communication between the forming bin and the feeding bin through the first channel, the feeding mechanism supplies the material to be printed, the forming mechanism continuously produces, the time consumed by the printing to be washed again is reduced, the communication between the forming bin and the discharging bin is controlled through the second channel, the heat treatment device directly heat treats the finished product material, the time of the finished product material and the vacuum pumping is saved, and the production efficiency is improved.

[0006] Optionally, in some embodiments of the present application, the feeding bin is provided with a feeding bin door and a feeding rack; the feeding bin door is arranged on the side wall of the feeding bin; and the feeding rack is arranged in the feeding bin.

[0007] Optionally, in some embodiments of the present application, the feeding device is a feeding mechanical arm; a feeding rack station and a feeding printing station are arranged on the paw of the feeding mechanical arm.

[0008] Optionally, in some embodiments of the present application, the feeding rack is provided with a feeding tray and a feeding empty tray.

[0009] Optionally, in some embodiments of the present application, the discharging bin is provided with a discharging bin door and a discharging rack; the discharging bin door is arranged on the side wall of the discharging bin; and the discharging rack is arranged in the discharging bin.

[0010] Optionally, in some embodiments of the present application, the discharging device is a discharging mechanical arm; and the gripper of the discharging mechanical arm is provided with a discharging rack station, a heat treatment station and a discharging printing station.

[0011] Optionally, in some embodiments of the present application, the discharging rack is provided with a discharging tray, a discharging empty tray and a heat treatment tray.

[0012] Optionally, in some embodiments of the present application, the feeding sealing door assembly comprises a first base and two first door bodies slidingly connected to the first base, so as to seal the feeding bin and the forming bin when the two first door bodies move towards each other, and to communicate the feeding bin and the forming bin when the two first door bodies move away from each other.

[0013] Optionally, in some embodiments of the present application, the discharging sealing door assembly comprises a second base and two second door bodies slidingly connected to the second base, so as to seal the discharging bin and the forming bin when the two second door bodies move towards each other, and to communicate the discharging bin and the forming bin when the two second door bodies move away from each other.

[0014] Optionally, in some embodiments of the present application, the feeding bin air exchange assembly comprises a feeding bin air inlet valve and a feeding bin air outlet valve respectively communicating with the feeding bin; and the discharging bin air exchange assembly comprises a discharging bin air inlet valve and a discharging bin air outlet valve respectively communicating with the discharging bin. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structure schematic diagram of a metal printing and heat treatment device in an embodiment of the present application is shown.

[0016] Figure 2 A structure schematic diagram of a metal printing and heat treatment device in another view of an embodiment of the present application is shown.

[0017] Figure 3 A structure schematic diagram of part of a metal printing and heat treatment device in an embodiment of the present application is shown.

[0018] Figure 4 A structure schematic diagram of a feeding sealing door assembly in an embodiment of the present application is shown.

[0019] Figure 5 A structure schematic diagram of part of a forming mechanism in an embodiment of the present application is shown.

[0020] Figure 6 A structure schematic diagram of part of a metal printing and heat treatment device in an embodiment of the present application is shown.

[0021] Figure 7A structural schematic diagram of part of a discharging mechanism and a discharging sealing door assembly in an embodiment of the present application is shown.

[0022] Main element symbol explanation

[0023] Metal printing heat treatment equipment 100

[0024] Feeding mechanism 10

[0025] Feeding bin 11

[0026] First opening 111

[0027] Feeding bin door 112

[0028] First air inlet 113

[0029] First air outlet 114

[0030] Feeding rack 115

[0031] Feeding equipment 12

[0032] First connecting part 14

[0033] Molding mechanism 20

[0034] Molding bin 21

[0035] Second air inlet 211

[0036] Second air outlet 212

[0037] Printing equipment 22

[0038] Second connecting part 23

[0039] Molding feeding equipment 24

[0040] Molding feeding rack 25

[0041] Molding discharging equipment 26

[0042] Molding discharging rack 27

[0043] First bracket 28

[0044] Second bracket 29

[0045] Third connecting part 210

[0046] Discharging mechanism 30

[0047] Discharging bin 31

[0048] Second opening 311

[0049] Discharging bin door 312

[0050] Third air intake 313

[0051] Third air outlet 314

[0052] Material unloading rack 315

[0053] Heat treatment equipment 32

[0054] Feeding equipment 33

[0055] Fourth connecting part 34

[0056] Feeding sealing door assembly 40

[0057] First base 41

[0058] First slide rail 411

[0059] First gate 42

[0060] first convex portion 421

[0061] first recess 422

[0062] Material unloading sealing door assembly 50

[0063] Second base 51

[0064] Second slide rail 511

[0065] Second gate body 52

[0066] Second convex portion 521

[0067] Second recess 522

[0068] Ventilation mechanism 60

[0069] 61 air exchange components for feeding hopper

[0070] 62 air exchange components for feeding hopper

[0071] Forming chamber ventilation component 63

[0072] 200 materials to be printed

[0073] Finished materials 300

[0074] Feeding pallet 401

[0075] Feeding tray 402

[0076] The following specific embodiments will further illustrate this application in conjunction with the above-described accompanying drawings. Detailed Implementation

[0077] The following specific embodiments are exemplary and not limiting, and are intended to provide a basic understanding of this application, and are not intended to identify key or decisive elements of this application or limit the scope of protection. As long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

[0078] When a component is considered to be "located" on another component, it can be directly on the other component or may also be interspersed with other components. When a component is considered to be "connected" to another component, it can be directly connected to the other component or may also be interspersed with other components.

[0079] The following describes some embodiments of this application in detail with reference to the accompanying drawings.

[0080] Please see Figures 1 to 7 This application provides a metal printing heat treatment apparatus 100, including a feeding mechanism 10, a forming mechanism 20, and a discharging mechanism 30. The feeding mechanism 10 includes a feeding bin 11 and a feeding device 12, with the feeding device 12 disposed inside the feeding bin 11, which is used to hold the material 200 to be printed.

[0081] In some embodiments, the forming mechanism 20 includes a forming chamber 21 and a printing device 22 disposed within the forming chamber 21. The forming chamber 21 is connected to the feeding chamber 11 via a feeding sealing door assembly 40. The printing device 22 can be a DED (Direct Energy Deposition) metal printing device or an SLM (Selective Laser Melting) metal printing device.

[0082] In some embodiments, the unloading mechanism 30 includes an unloading bin 31 and a heat treatment device 32 and an unloading device 33 disposed within the unloading bin 31. The forming bin 21 and the unloading bin 31 are connected by an unloading sealing door assembly 50.

[0083] In some embodiments, the metal printing heat treatment equipment 100 includes a ventilation mechanism 60, which includes a loading bin ventilation component 61 and a discharging bin ventilation component 62. The loading bin ventilation component 61 is connected to the loading bin 11 and is used to clean the loading bin 11. The discharging bin ventilation component 62 is connected to the discharging bin 31 and is used to clean the discharging bin 31.

[0084] In some embodiments, when the oxygen content in the feeding hopper 11 is lower than a first preset value, the feeding sealing door assembly 40 opens, connecting the forming hopper 21 with the feeding hopper 11. The material to be printed 200 is moved into the forming hopper 21, and the printing device 22 prints the material to be printed 200 into the finished material 300.

[0085] In some embodiments, when the oxygen content in the discharge hopper 31 is lower than a first preset value, the discharge sealing door assembly 50 opens, connecting the forming hopper 21 and the discharge hopper 31. The finished material 300 is moved into the discharge hopper 31, and the heat treatment equipment 32 performs heat treatment on the finished material 300. This allows the finished material 300 to be heat-treated directly within the discharge hopper 31, ensuring that the mechanical properties of the finished material 300 meet design requirements. Since the gas inside the discharge hopper 31 has undergone gas scrubbing treatment, the heat treatment process does not require further gas scrubbing, thus saving scrubbing time and costs associated with heat treatment.

[0086] The connection between the forming chamber 21 and the feeding chamber 11 is controlled by the feeding sealing door assembly 40. The feeding mechanism 10 supplies the material to be printed 200, enabling the forming mechanism 20 to continue production and reducing the time spent on re-washing after printing. The connection between the forming chamber 21 and the discharging chamber 31 is controlled by the discharging sealing door assembly 50. The heat treatment equipment 32 directly heat-treats the finished material 300, saving the time of finishing material 300 and washing, and improving production efficiency.

[0087] Please see Figure 1 and Figure 2 In some embodiments, the feeding hopper 11 is provided with a first opening 111 and a feeding hopper door 112. The feeding hopper door 112 is opened on the side wall of the feeding hopper 11 and is connected to the first opening 111 for opening or closing the first opening 111. The material to be printed 200 enters the feeding hopper 11 through the first opening 111.

[0088] In some embodiments, the feeding hopper 11 is provided with a first air inlet 113. After the material to be printed 200 is put into the feeding hopper 11, the feeding hopper door 112 closes the first opening 111 and injects inert gas into the feeding hopper 11 through the first air inlet 113, so that the oxygen content in the feeding hopper 11 is lower than a first preset value.

[0089] In some embodiments, the oxygen content of the first preset value is less than 0.01%.

[0090] In some embodiments, the feeding hopper 11 is provided with a first air outlet 114 for discharging inert gas from the feeding hopper 11.

[0091] In some embodiments, the hopper ventilation assembly 61 includes a hopper inlet valve and a hopper outlet valve. The hopper inlet valve is used to control the opening or closing of the first inlet 113. The hopper outlet valve is used to control the opening or closing of the first outlet 114.

[0092] Please see Figure 3In some embodiments, the feeding bin 11 is provided with a feeding rack 115, which is disposed inside the feeding bin 11 and fixed to the bin wall of the feeding bin 11, for placing the material to be printed 200 that enters from the first opening 111.

[0093] In some embodiments, the feeding device 12 is located within the feeding bin 11 and is used to move the material to be printed 200 to the forming bin 21. Optionally, the feeding device 12 includes a feeding robotic arm. Optionally, the feeding robotic arm includes a five-axis robotic arm.

[0094] In some embodiments, the gripper of the loading robotic arm is provided with a loading rack station and a loading and printing station, and the material to be printed 200 is moved from the loading rack station to the loading and printing station.

[0095] Please see Figure 3 In some embodiments, the material to be printed 200 is placed in a feeding tray 401, and multiple feeding trays 401 are stacked on a feeding rack 115. The feeding device 12 is used to move the feeding trays 401 sequentially into the forming chamber 21.

[0096] In some embodiments, the feeding device 12 is used to move the empty feeding pallet in the forming chamber 21 to the feeding rack 115, so as to facilitate the removal of the empty feeding pallet from the feeding chamber 11.

[0097] Please see Figure 3 In some embodiments, the feeding sealing door assembly 40 includes a first base 41 and two first door bodies 42 that are slidably connected to the first base 41. The two first door bodies 42 move toward each other to seal the feeding bin 11 and the forming bin 21, and move away from each other to connect the feeding bin 11 and the forming bin 21.

[0098] In some embodiments, the first base 41 is provided with a first slide rail 411, and two first door bodies 42 are disposed within the first slide rail 411.

[0099] Please see Figure 4 In some embodiments, one of the first door bodies 42 is provided with a first protrusion 421 and the other first door body 42 is provided with a first recess 422. When the two first door bodies 42 are closed, the first protrusion 421 is provided in the first recess 422, which is conducive to the two first door bodies 42 fitting tightly and improving the sealing performance.

[0100] In some embodiments, the feeding mechanism 10 includes a first connecting portion 14 protruding from the feeding chamber 11, the forming mechanism 20 includes a second connecting portion 23 protruding from the forming chamber 21, and the first door body 42 is located between the first connecting portion 14 and the second connecting portion 23. Optionally, the first connecting portion 14 includes a flange, and the second connecting portion 23 includes a flange.

[0101] In some embodiments, a first sealing element (not shown) is provided between the first door 42 and the feeding bin 11, and a second sealing element (not shown) is provided between the first door 42 and the forming bin 21. Optionally, the first sealing element includes a sealing ring, and the second sealing element includes a sealing ring.

[0102] In some embodiments, a first seal is disposed between the first connecting portion 14 and the first door body 42, and a second seal is disposed between the second connecting portion 23 and the first door body 42.

[0103] Please see Figure 5 In some embodiments, the molding mechanism 20 includes a molding feeding device 24 and a molding feeding rack 25, the molding feeding rack 25 being fixed to the wall of the molding chamber 21. The molding feeding rack 25 is used to receive the feeding tray 401 that moves from the feeding device 12, and the molding feeding device 24 is used to move the material to be printed 200 on the molding feeding rack 25 to the printing device 22.

[0104] In some embodiments, the molding feeding device 24 includes a molding feeding robotic arm, and optionally, the molding feeding robotic arm includes a five-axis robotic arm.

[0105] In some embodiments, the gripper of the forming and feeding robotic arm is provided with a forming and feeding rack station and a printing equipment station, so as to move the material to be printed 200 from the forming and feeding rack station to the printing equipment station.

[0106] In some embodiments, the molding mechanism 20 includes a molding unloading device 26 and a molding unloading rack 27, the molding unloading rack 27 being fixed to the wall of the molding chamber 21. The molding unloading device 26 is used to move the finished product material 300 printed by the printing device 22 to the molding unloading rack 27.

[0107] In some embodiments, the molding unloading device 26 includes a molding unloading robotic arm; optionally, the molding unloading device 26 includes a five-axis robotic arm.

[0108] In some embodiments, the gripper of the forming and unloading robotic arm is equipped with a printing equipment station and a forming and unloading rack station, which moves the finished product material 300 from the printing equipment station to the forming and unloading rack station.

[0109] In some embodiments, the molding mechanism 20 includes a first bracket 28, which is fixed to the wall of the molding chamber 21 and located below the molding loading rack 25. The first bracket 28 is used to hold empty loading trays 401. Specifically, after the molding loading device 24 has moved all the materials 200 to be printed in the loading trays 401 of the first layer to the printing device 22 for printing, the molding loading device 24 moves the empty loading trays 401 to the first bracket 28, exposing the lower loading trays 401 containing the materials 200 to be printed.

[0110] In some embodiments, the feeding device 12 moves the empty feeding tray on the first bracket 28 to the feeding rack 115.

[0111] In some embodiments, the molding mechanism 20 includes a second bracket 29, which is fixed to the wall of the molding chamber 21 and located below the molding unloading rack 27. The second bracket 29 is used to hold an empty unloading tray 402, and the molding unloading device 26 is used to move the empty tray 402 to the molding unloading rack 27 for easy placement of the finished product 300. (See also...) Figure 6 and Figure 7 In some embodiments, the material unloading sealing door assembly 50 includes a second base 51 and two second door bodies 52 slidably connected to the second base 51. The two second door bodies 52 move toward each other to seal the molding chamber 21 and the material unloading chamber 31, and move away from each other to open the sealing molding chamber 21 and the material unloading chamber 31.

[0112] In some embodiments, the second base 51 is provided with a second slide rail 511, and two second door bodies 52 are disposed within the second slide rail 511.

[0113] In some embodiments, one of the second door bodies 52 is provided with a second protrusion 521 and the other second door body 52 is provided with a second recess 522. When the two second door bodies 52 are closed, the second protrusion 521 is provided in the second recess 522, which is conducive to the two second door bodies 52 fitting tightly and improving the sealing performance.

[0114] In some embodiments, the molding mechanism 20 includes a third connecting portion 210 protruding from the molding chamber 21, the unloading mechanism 30 includes a fourth connecting portion 34 protruding from the unloading chamber 31, and the second door 52 is located between the third connecting portion 210 and the fourth connecting portion 34. Optionally, the third connecting portion 210 includes a flange, and the fourth connecting portion 34 includes a flange.

[0115] In some embodiments, a third seal (not shown) is provided between the second door 52 and the forming chamber 21, and a fourth seal (not shown) is provided between the second door 52 and the unloading chamber 31. Optionally, the first seal includes a sealing ring, and the second seal includes a sealing ring.

[0116] In some embodiments, a third seal is disposed between the third connecting portion 210 and the second door body 52, and a fourth seal is disposed between the fourth connecting portion 34 and the second door body 52.

[0117] Please see Figure 2 In some embodiments, the ventilation mechanism 60 includes a forming chamber ventilation assembly 63. The forming chamber ventilation assembly 63 is connected to the forming chamber 21 and is used to clean the forming chamber 21.

[0118] In some embodiments, the molding chamber 21 is provided with a second air inlet 211, through which inert gas is injected into the molding chamber 21 to make the oxygen content in the molding chamber 21 lower than a first preset value, so that the printing device 22 can print the material to be printed 200.

[0119] In some embodiments, the molding chamber 21 is provided with a second air outlet 212 for discharging inert gas from the molding chamber 21.

[0120] In some embodiments, the molding chamber ventilation assembly 63 includes a molding chamber inlet valve and a molding chamber outlet valve. The molding chamber inlet valve is used to control the opening or closing of the second inlet 211. The molding chamber outlet valve is used to control the opening or closing of the second outlet 212.

[0121] Please see Figure 6 and Figure 7 In some embodiments, the feeding hopper 31 is provided with a second opening 311 and a feeding hopper door 312. The feeding hopper door 312 is connected to the second opening 311 and is used to open or close the second opening 311. The heat-treated finished material 300 is taken out from the second opening 311. During the process of taking out the finished material 300, the forming hopper 21 and the feeding hopper 31 are in a closed state. After the finished material 300 is taken out, the second opening 311 is closed, and inert gas is injected into the feeding hopper 31. When the oxygen content in the feeding hopper 31 is lower than a first preset value, the forming hopper 21 is connected to the feeding hopper 31.

[0122] In some embodiments, the feeding hopper 31 is provided with a third air inlet 313. After the finished material 300 is taken out, the feeding hopper door 312 closes the second opening 311 and injects inert gas into the feeding hopper 31 through the third air inlet 313, so that the oxygen content in the feeding hopper 31 is lower than the first preset value.

[0123] In some embodiments, the feeding bin 31 is provided with a third air outlet 314 for discharging inert gas from the feeding bin 31.

[0124] In some embodiments, the hopper ventilation assembly 62 includes a hopper inlet valve and a hopper outlet valve. The hopper inlet valve controls the opening or closing of the third air inlet 313. The hopper outlet valve controls the opening or closing of the third air outlet 314.

[0125] In some embodiments, the feeding bin 31 is provided with a feeding rack 315, which is disposed inside the feeding bin 31 and fixed to the bin wall of the feeding bin 31 for placing the heat-treated finished material 300.

[0126] In some embodiments, the unloading device 33 is used to move the finished material 300 from the forming unloading rack 27 to the heat treatment device 32, and is also used to place the heat-treated finished material 300 on the unloading rack 315. Optionally, unloading trays 402 containing the heat-treated finished material 300 are stacked on the unloading rack 315.

[0127] In some embodiments, the unloading device 33 includes an unloading robotic arm, and optionally, the unloading robotic arm includes a five-axis robotic arm.

[0128] In some embodiments, the gripper of the unloading robotic arm is equipped with an unloading rack station, a heat treatment station, and an unloading printing station, which moves the finished material 300 from the unloading printing station to the unloading rack station, and then from the unloading rack station to the heat treatment station.

[0129] In some embodiments, the gripper of the unloading robotic arm is provided with a second bracket station. After the finished material 300 is taken out through the unloading bin door 312, the empty unloading tray is moved to the second bracket 29.

[0130] When using the aforementioned metal printing heat treatment equipment 100, firstly, the loading chamber door 112 is opened, and the material to be printed 200 is placed on the loading rack 115. Then, the loading chamber door 112 is closed, and inert gas is injected into the loading chamber 11 through the first air inlet 113 to make the oxygen content in the loading chamber 11 lower than the first preset value. Then, the loading sealing door assembly 40 is opened, and the loading device 12 moves the material to be printed 200 to the forming loading rack 25. The forming loading device 24 moves the material to be printed 200 on the forming loading rack 25 to the printing device 22. After printing is completed, the forming unloading device 26 unloads the finished material 3. 00 moves to the forming unloading rack 27, opens the unloading sealing door assembly 50, and the unloading device 33 moves the finished material 300 from the forming unloading rack 27 to the heat treatment device 32, and places the heat-treated finished material 300 on the unloading rack 315. When the unloading trays 402 on the unloading rack 315 are stacked to a predetermined number, the unloading hopper door 312 is opened, and the heat-treated finished material 300 is taken out from the second opening 311. Then the unloading hopper door 312 is closed, and inert gas is injected into the unloading hopper 31. When the oxygen content in the unloading hopper 31 is lower than the first preset value, the unloading sealing door assembly 50 is opened, and this cycle is repeated.

[0131] This application controls the connection between the feeding mechanism 10 and the forming mechanism 20 through the feeding sealing door assembly 40. The feeding mechanism 10 supplies the material to be printed 200, enabling the forming mechanism 20 to continue production and reducing the time spent on re-purging during printing. The connection between the forming mechanism 20 and the unloading mechanism 30 is controlled through the unloading sealing door assembly 50. The heat treatment equipment 32 directly heat-treats the finished material 300, saving the time of the finished material 300 and vacuuming, and improving production efficiency.

[0132] Those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the spirit and essence of this application fall within the scope of this application's disclosure.

Claims

1. A metal printing heat treatment device, characterized in that, include: A feeding mechanism includes a feeding bin and a feeding device; the feeding device is disposed within the feeding bin. The molding mechanism includes a molding chamber and printing equipment; The printing equipment is located inside the forming chamber; The forming chamber and the feeding chamber are sealed and connected by a feeding sealing door assembly; The feeding mechanism includes a feeding bin, a feeding device, and a heat treatment device; both the feeding device and the heat treatment device are located inside the feeding bin; the feeding bin and the forming bin are sealed and connected by a feeding sealing door assembly. The ventilation system includes a ventilation assembly for the loading hopper and a ventilation assembly for the unloading hopper; The air exchange component of the feeding hopper is connected to the feeding hopper and is used to clean the feeding hopper; the air exchange component of the discharging hopper is connected to the discharging hopper and is used to clean the discharging hopper.

2. The metal printing heat treatment equipment as described in claim 1, characterized in that, The feeding hopper is equipped with a feeding hopper door and a feeding rack; the feeding hopper door is located on the side wall of the feeding hopper; the feeding rack is located inside the feeding hopper.

3. The metal printing heat treatment equipment as described in claim 2, characterized in that, The feeding device is a feeding robotic arm; the gripper of the feeding robotic arm is equipped with a feeding rack station and a feeding printing station.

4. The metal printing heat treatment equipment as described in claim 3, characterized in that, The loading rack is equipped with a loading tray and an empty loading tray.

5. The metal printing heat treatment equipment as described in claim 1, characterized in that, The unloading hopper is equipped with an unloading hopper door and an unloading rack; the unloading hopper door is located on the side wall of the unloading hopper; the unloading rack is located inside the unloading hopper.

6. The metal printing heat treatment equipment as described in claim 5, characterized in that, The unloading device is an unloading robotic arm; the gripper of the unloading robotic arm is equipped with an unloading rack station, a heat treatment station, and an unloading printing station.

7. The metal printing heat treatment equipment as described in claim 6, characterized in that, The unloading rack is equipped with an unloading tray, an empty unloading tray, and a heat treatment tray.

8. The metal printing heat treatment equipment as described in claim 1, characterized in that, The feeding sealing door assembly includes a first base and two first door bodies slidably connected to the first base, so as to seal the feeding bin and the forming bin when the two first door bodies move toward each other, and to connect the feeding bin and the forming bin when the two first door bodies move away from each other.

9. The metal printing heat treatment equipment as described in claim 1, characterized in that, The material discharge sealing door assembly includes a second base and two second door bodies slidably connected to the second base, so as to seal the material discharge bin and the forming bin when the two second door bodies move toward each other, and to connect the material discharge bin and the forming bin when the two second door bodies move away from each other.

10. The metal printing heat treatment equipment as described in claim 1, characterized in that, The air exchange assembly for the feeding hopper includes a feeding hopper inlet valve and a feeding hopper outlet valve, which are respectively connected to the feeding hopper; the air exchange assembly for the discharging hopper includes a discharging hopper inlet valve and a discharging hopper outlet valve, which are respectively connected to the discharging hopper.

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