Metal powder metallurgy industrial resistance furnace facilitating material loading and unloading

Abstract

The utility model provides a metal powder metallurgy industry resistance furnace convenient for material loading and unloading relates to metal powder production technical field, including air lock cavity, the inside of air lock cavity is equipped with the feeding and discharging device, the one side of air lock cavity is equipped with the furnace body, the inside of furnace body is equipped with heating module, the bottom of heating module is equipped with cooling module, the bottom of cooling module is equipped with furnace body end, the one side of air lock cavity is equipped with the feeding port, the other side of air lock cavity is equipped with the discharge port, adopt the feeding and discharging device, realized through feeding and discharging device and carried out material exchange under the premise of completely not disturbing main furnace atmosphere, the oxygen content and dew point in the furnace can be maintained at extremely low level for a long time, fundamentally put an end to the product oxidation, ensure the high stability of material performance and the high consistency between batches, the smooth transmission and accurate positioning of automation, avoid any mechanical impact to the material, greatly improve the sintering yield of precision, complex or thin wall parts.

Description

Technical Field

[0001] This utility model relates to the field of metal powder production technology, and in particular to a metal powder metallurgy industrial resistance furnace that facilitates material loading and unloading. Background Technology

[0002] According to Chinese Patent No. CN119022628A, a smelting equipment for producing metal alloy powder includes a resistance furnace body and a door set on the resistance furnace body. It also includes: a feeding hole opened on the top of the resistance furnace body and communicating with the inner cavity of the resistance furnace body for adding raw materials; and multiple sliding blocks slidably set inside the resistance furnace body.

[0003] The aforementioned comparative documents and existing technologies have the following technical problems: Existing metal powder metallurgy industrial resistance furnaces, such as traditional pusher-type and mesh belt furnaces, have significant technical pain points in their material loading and unloading process. Frequent opening and closing of the furnace door during loading and unloading allows outside air to intrude, severely damaging the high-purity protective atmosphere inside the furnace, leading to product oxidation and poor quality consistency. Material loading and unloading largely rely on manual handling and positioning, which is not only labor-intensive and inefficient, but also poses safety hazards such as burns when operating at high-temperature furnace openings. Intermittent loading and unloading operations interrupt the continuity of production, and the waiting time for the atmosphere to recover is long. Furthermore, pusher-type furnaces are subject to mechanical impact and jamming risks, affecting production cycle and yield. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a metal powder metallurgy industrial resistance furnace that facilitates material loading and unloading.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a metal powder metallurgy industrial resistance furnace that facilitates material loading and unloading, comprising an airlock cavity, wherein an inlet and outlet device is provided inside the airlock cavity, a furnace body is provided on one side of the airlock cavity, a heating module is provided inside the furnace body, a cooling module is provided at the bottom of the heating module, and a furnace body end is provided at the bottom of the cooling module.

[0006] Preferably, the airlock cavity has a feeding port on one side and a discharging port on the other side, and the discharging port is connected to the furnace inlet.

[0007] Preferably, the feeding and discharging device includes a rotary table, the top of the rotary table is provided with a groove, the top of the groove is provided with a material tray station, the top center of the rotary table is provided with a controller, one side of the controller is provided with a telescopic rod, one end of the telescopic rod is provided with a docking plate, and the inside of the feeding and discharging device is provided with a sealing area.

[0008] Preferably, the interior of the groove at the top of the rotating turntable is provided with a spring block, and the material tray station includes a loading and unloading station, an atmosphere replacement station, a furnace docking station, and a cooling station.

[0009] Preferably, the rotating turntable is equipped with a pressure sensor inside. The loading and unloading station, atmosphere replacement station, furnace docking station and cooling station are arranged in a circumferential array on the rotating turntable and are evenly distributed at 90-degree angles. The atmosphere replacement station and cooling station are both located in the sealed area inside the feeding and discharging device.

[0010] Preferably, the loading and unloading station is located outside the feeding port, the atmosphere replacement station sealing area is equipped with a vacuum pump, inert gas pipeline, valve and sensor connecting the cavity, the furnace docking station is located outside the feeding port, and a docking plate is provided on one side of the furnace docking station, and a water cooling jacket is provided inside the cooling station sealing area.

[0011] Preferably, the feeding and discharging device is equipped with a servo motor and a precision reducer, and the discharge port on one side of the feeding and discharging device is equipped with a sealing door, which is connected to the inlet of the furnace body.

[0012] Beneficial effects

[0013] This invention employs a feeding and discharging device, which enables material exchange without disturbing the atmosphere of the main furnace. The oxygen content and dew point inside the furnace can be maintained at extremely low levels for a long time, fundamentally eliminating product oxidation, ensuring high stability of material properties and high consistency between batches. Automated and stable conveying and precise positioning avoid any mechanical impact on the materials, greatly improving the sintering yield of precision, complex or thin-walled parts.

[0014] This invention employs an automated device, transforming intermittent loading and unloading operations into a parallel automated process. Loading, unloading, and atmosphere pretreatment are performed simultaneously, eliminating time wasted on opening and closing furnace doors and waiting for atmosphere stabilization. This significantly increases the effective operating time of the equipment. The modular furnace design and more reliable conveying mechanism make maintenance more convenient. Faults in individual modules can be quickly isolated and repaired, avoiding the prolonged production stoppages that occur with traditional furnaces where a single fault requires a complete shutdown. True sealed loading and unloading ensures stable micro-positive pressure inside the furnace, minimizing atmosphere loss and consumption, thus saving on protective gas costs. Fully automated operation replaces repetitive manual handling and monitoring; one operator can manage multiple devices simultaneously, significantly reducing manpower requirements and related management costs. The modular heating design allows for on-demand operation based on production tasks, avoiding the energy waste associated with traditional furnace-wide heating.

[0015] This invention employs a fully automated process, which completely isolates operators from the high-temperature furnace opening, heavy material trays, and potentially harmful gases, eliminating safety hazards such as burns, bruises, and gas leaks at the source. The integrated intelligent sensors and control system can monitor the equipment status in real time, provide early warnings for abnormal situations, and automatically shut down the equipment, thereby improving the inherent safety level of the production process. Attached Figure Description

[0016] Figure 1 This is an isometric view of the present invention;

[0017] Figure 2 This is a front view of the present invention;

[0018] Figure 3 This is a perspective view of the airlock cavity of this utility model;

[0019] Figure 4 This is an isometric view of the feeding and discharging device of this utility model;

[0020] Figure 5 This is a top view of the feeding and discharging device of this utility model;

[0021] Figure 6 This is a diagram showing the location of the groove in this utility model.

[0022] Legend:

[0023] 1. Airlock cavity; 2. Feeding and discharging device; 201. Rotary turntable; 2021. Spring block; 202. Groove; 203. Loading and unloading station; 204. Atmosphere replacement station; 205. Furnace docking station; 206. Cooling station; 207. Controller; 208. Telescopic rod; 209. Docking plate; 3. Furnace body; 4. Heating module; 5. Cooling module; 6. Furnace body end; 7. Feed port; 8. Discharge port. Detailed Implementation

[0024] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0025] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0027] Reference Figure 1-6This utility model provides a metal powder metallurgy industrial resistance furnace for easy material loading and unloading, including an airlock cavity 1, with a feeding / discharging device 2 inside the airlock cavity 1, a furnace body 3 on one side of the airlock cavity 1, a heating module 4 inside the furnace body 3, a cooling module 5 at the bottom of the heating module 4, and a furnace body end 6 at the bottom of the cooling module 5. A loading port 7 is located on one side of the airlock cavity 1, and a discharging port 8 is located on the other side of the airlock cavity 1, which is connected to the inlet of the furnace body 3. The feeding / discharging device 2 includes a rotating turntable 201, with a groove 202 at the top of the rotating turntable 201, a material tray station at the top of the groove 202, a controller 207 at the center of the top of the rotating turntable 201, and a telescopic rod 2 on one side of the controller 207. 08. One end of the telescopic rod 208 is equipped with a docking plate 209. The inside of the feeding / discharging device 2 is equipped with a sealing area. The inside of the groove 202 on the top of the rotating turntable 201 is equipped with a spring block 2021. The material tray station includes a loading / unloading station 203, an atmosphere replacement station 204, a furnace docking station 205, and a cooling station 206. The inside of the rotating turntable 201 is equipped with a pressure sensor. The loading / unloading station 203, the atmosphere replacement station 204, the furnace docking station 205, and the cooling station 206 are arranged in a circular array on the rotating turntable 201 and are evenly distributed at 90-degree angles. The atmosphere replacement station 204 and the cooling station 206 are both located in the sealing area inside the feeding / discharging device 2. The loading / unloading station 203 is located outside the feeding port 7. The inside of the sealing area of ​​the atmosphere replacement station 204 is equipped with a connecting plate 2021. The furnace body is connected to a vacuum pump, inert gas pipeline, valves, and sensors. The furnace docking station 205 is located outside the discharge port 8, and a docking plate 209 is provided on one side of the furnace docking station 205. The cooling station 206 has a water-cooled jacket inside the sealed area. The feeding and discharging device 2 has a servo motor and a precision reducer inside, and a sealing door is provided inside the discharge port 8 on one side of the feeding and discharging device 2. The sealing door is connected to the inlet of the furnace body 3. The working process is as follows: The system is in standby mode, sintering is taking place inside the furnace, and the external industrial robot arm grabs a tray containing a "green billet" to be sintered and accurately places it on the loading and unloading station 203 of the rotating turntable 201. At this time, the loading and unloading station 203 is facing the external feeding port 7. The central control system issues a command to drive the system. The system starts, causing the rotary table 201 to rotate 90 degrees clockwise. The newly loaded tray moves from the loading / unloading station 203 to the atmosphere replacement station 204 and completely enters the sealed cavity of the gas valve. At this time, an empty cooling station 206 moves to the loading / unloading station 203, ready to receive the next new tray. Immediately afterwards, a sintered tray is located at the furnace docking station 205. When the tray arrives at the atmosphere replacement station 204, the corresponding independent valve opens, and the atmosphere processing unit inside the atmosphere replacement station 204 begins to work. First, the vacuum pump evacuates the small compartment where the station is located to remove most of the air. Then, the valve switches, and nitrogen is refilled into the compartment until its internal pressure and gas composition are basically the same as those of the main furnace.This step is performed simultaneously with the sintering in the furnace and the subsequent unloading action, greatly saving time. The telescopic rod 208 inside the furnace body 3 activates, driving the docking plate 209 to push a sintered tray from the main furnace chamber onto the turntable located at the furnace docking station 205. Immediately afterwards, the turntable 201 rotates 90 degrees clockwise again. At this point, the new tray, which has completed atmosphere replacement and is located at the atmosphere replacement station 204, precisely rotates to the furnace docking station 205, aligning with the furnace inlet. The furnace conveying mechanism then activates, pushing this new tray from the turntable into the furnace chamber, beginning its... During the sintering process, the turntable, containing the freshly removed, still-hot finished product trays, rotates from furnace docking station 205 to cooling station 206. At this station, the water-cooling jacket provides initial cooling. The turntable then rotates 90 degrees clockwise, and the trays containing the cooled finished products move from cooling station 206 to loading / unloading station 203. An external industrial robot arm extends to grab the trays and place them onto the finished product unloading conveyor belt. This completes one work cycle, and the system can seamlessly begin the next cycle, achieving truly continuous, closed, and automated material handling. Specific Implementation Example 2:

[0029] Reference Figure 1 The system can consist of a fully sealable intelligent material box, a vertical lifting docking platform, and a pre-furnace / post-furnace buffer bin. Operators load multiple trays into the material box from outside the furnace, then seal the entire box. The box is transported to the vertical lifting docking platform in front of the furnace via a conveyor belt. The platform rises, precisely docking the material box's outlet with the furnace opening in a sealed environment. Subsequently, an automated robotic arm inside the furnace smoothly pulls the trays from the box into the furnace chamber layer by layer. The unloading process is reversed. This transforms frequent single-tray operations into a single docking of the entire box, significantly increasing the quantity and efficiency of material loading and unloading in a single operation. It also significantly reduces the frequency of furnace opening sealing docking, ensuring greater stability of the furnace atmosphere. More importantly, it achieves perfect batch physical isolation and information traceability. Each material box corresponds to an independent batch, making it ideal for medical, aerospace, and military industries with extremely stringent batch management and quality traceability requirements.

[0030] In summary:

[0031] 1. By adopting the feeding and discharging device 2, material exchange is achieved without disturbing the atmosphere of the main furnace. The oxygen content and dew point in the furnace can be maintained at an extremely low level for a long time, which fundamentally eliminates product oxidation, ensures high stability of material performance and high consistency between batches, and the automated smooth conveying and precise positioning avoid any mechanical impact on the materials, which greatly improves the sintering yield of precision, complex or thin-walled parts.

[0032] 2. The adoption of automated devices transforms intermittent loading and unloading operations into parallel automated processes. Loading, unloading, and atmosphere pretreatment are carried out simultaneously, eliminating the time wasted due to opening and closing furnace doors and waiting for the atmosphere to stabilize. The effective operating time of the equipment is greatly increased. The modular furnace body 3 design and more reliable conveying mechanism make maintenance more convenient. Faults in a single module can be quickly isolated and repaired, avoiding the long-term production stoppages that would occur with the traditional furnace body 3 when one module fails. Due to the true sealed loading and unloading, the slight positive pressure inside the furnace is stable, and the loss and consumption of atmosphere are minimized, saving more on protective gas costs. Fully automated operation replaces repetitive manual handling and monitoring. One operator can manage multiple devices simultaneously, significantly reducing manpower requirements and related management costs. The modular heating design can be turned on as needed according to production tasks, avoiding the energy waste of heating the entire furnace body 3 in the traditional way.

[0033] 3. The fully automated process completely isolates operators from the high-temperature furnace opening, heavy material trays, and potentially harmful gases, eliminating safety hazards such as burns, bruises, and gas leaks at the source. The integrated intelligent sensors and control system can monitor the equipment status in real time, provide early warnings for abnormal situations, and automatically shut down the equipment, thereby improving the inherent safety level of the production process.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A metal powder metallurgy industrial resistance furnace for easy material loading and unloading, comprising a gas-lock chamber (1), characterized in that: The airlock cavity (1) is provided with a feeding and discharging device (2), and a furnace body (3) is provided on one side of the airlock cavity (1). A heating module (4) is provided inside the furnace body (3). A cooling module (5) is provided at the bottom of the heating module (4). A furnace end (6) is provided at the bottom of the cooling module (5).

2. The metal powder metallurgy industrial resistance furnace according to claim 1, which facilitates material loading and unloading, is characterized in that: The airlock cavity (1) has a feeding port (7) on one side and a discharging port (8) on the other side. The discharging port (8) is connected to the inlet of the furnace body (3).

3. The metal powder metallurgy industrial resistance furnace according to claim 1, which facilitates material loading and unloading, is characterized in that: The feeding and discharging device (2) includes a rotating turntable (201), the top of the rotating turntable (201) is provided with a groove (202), the top of the groove (202) is provided with a material tray station, the top center of the rotating turntable (201) is provided with a controller (207), one side of the controller (207) is provided with a telescopic rod (208), one end of the telescopic rod (208) is provided with a docking plate (209), and the inside of the feeding and discharging device (2) is provided with a sealing area.

4. A metal powder metallurgy industrial resistance furnace for easy material loading and unloading according to claim 3, characterized in that: The rotating turntable (201) has a spring block (2021) inside the groove (202) at the top. The material tray station includes a loading and unloading station (203), an atmosphere replacement station (204), a furnace docking station (205), and a cooling station (206).

5. A metal powder metallurgy industrial resistance furnace for easy material loading and unloading according to claim 4, characterized in that: The rotating turntable (201) is equipped with a pressure sensor. The loading and unloading station (203), atmosphere replacement station (204), furnace docking station (205) and cooling station (206) are arranged in a circular array on the rotating turntable (201) and are evenly distributed at a 90-degree angle. The atmosphere replacement station (204) and cooling station (206) are both located in the sealed area inside the feeding and discharging device (2).

6. A metal powder metallurgy industrial resistance furnace for easy material loading and unloading according to claim 5, characterized in that: The loading and unloading station (203) is located outside the feeding port (7). The atmosphere replacement station (204) is equipped with a vacuum pump, inert gas pipeline, valve and sensor inside the sealed area. The furnace docking station (205) is located outside the unloading port (8), and a docking plate (209) is provided on one side of the furnace docking station (205). The cooling station (206) is equipped with a water cooling jacket inside the sealed area.

7. A metal powder metallurgy industrial resistance furnace for easy material loading and unloading according to claim 1, characterized in that: The feeding and discharging device (2) is equipped with a servo motor and a precision reducer, and the feeding port (8) on one side of the feeding and discharging device (2) is equipped with a sealing door, which is connected to the inlet of the furnace body (3).

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