Feeding and discharging device and MIM feeding and discharging system

Abstract

The invention discloses a feeding and discharging device and an MIM feeding and discharging system, and belongs to the technical field of metal powder injection molding.The feeding and discharging device comprises a movable rack, a push-pull instrument is arranged on the movable rack and comprises a telescopic mechanism, a push-pull plate, a claw mechanism and a rotating mechanism, the push-pull plate is fixedly connected with the telescopic end of the telescopic mechanism, and the claw mechanism is fixedly connected with the rotating mechanism; the claw mechanism is installed on the push-pull plate and comprises a claw head capable of rotating. The MIM feeding and discharging system comprises a sintering furnace, a transfer skip car and the feeding and discharging device. Placing sliding grooves are formed in the side walls of the first discharging area and the second discharging area in the sintering furnace. A material frame is arranged on the transfer skip car, a containing channel is arranged on the material frame, and a temporary storage sliding groove is formed in the side wall of the containing channel. By introducing the feeding and discharging device, the repeated operation that feeding and discharging of the sintering furnace need to be manually carried for dozens of times is optimized to be completed only through six-step operation, the labor is reduced, meanwhile, the production efficiency is remarkably improved, and the production benefit is comprehensively improved.

Description

Technical Field

[0001] This invention relates to the field of metal powder injection molding technology, and in particular to a loading and unloading device and a MIM feeding and discharging system. Background Technology

[0002] Currently, the loading and unloading of materials in sintering furnaces mainly relies on manual handling by operators. (Reference) Figure 43 As shown, the sintering furnace 1 is typically divided into two zones (first feeding zone 10 and second feeding zone 11), with each zone containing multiple material plates 4. The specific process for loading and unloading materials into the sintering furnace is as follows: Sintering furnace feeding: First, the operator manually removes the material plates 4 from the first material rack 2 and inserts them into the second feeding area 11 of the sintering furnace 1; then, the pusher is used to push the material plates 4 from the second feeding area 11 of the sintering furnace 1 into the first feeding area 10; then, the material plates 4 are removed from the second material rack 2 and inserted into the second feeding area 11 of the sintering furnace 1, thus completing the sintering furnace feeding. Sintering furnace feeding: First, the operator manually removes the material plates 4 in the second feeding zone 11 of the sintering furnace 1 and inserts them into the second material rack 2. Then, the operator uses a pull rod to pull the material plates 4 from the first feeding zone 10 of the sintering furnace 1 to the second feeding zone 11. The operator then removes the material plates 4 from the second feeding zone 11 of the sintering furnace 1 and inserts them into the first material rack 2, thus completing the sintering furnace feeding.

[0003] Taking Hengpu's 480-PRO sintering furnace as an example, each zone holds twenty material plates 4, each material plate 4 being a graphite plate with dimensions of 440mm in length, 1070mm in width, and 5mm in thickness. Products are laid flat on each material plate 4, and each material plate 4 weighs 15KG when fully loaded. This means that the material plates need to be manually moved 80 times in a repetitive operation, consuming a significant amount of time and manpower. When unloading from the sintering furnace, the material plate temperature must be waited for to drop to a temperature that is palpable to the human hand before handling can begin. Furthermore, the cooling rate of the material plates within the sealed chamber of the sintering furnace is slow, resulting in excessively long waiting times and low production efficiency. Therefore, there is an urgent need for an automatic loading and unloading device for sintering furnaces to shorten loading and unloading times and reduce the labor intensity of operators. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems and provide a loading and unloading device and a MIM feeding and discharging system. By introducing the loading and unloading device, the repetitive operation of manually handling the material plates dozens of times in the original sintering furnace loading and unloading is optimized to be completed in only six steps, reducing manpower and significantly improving production efficiency, thereby achieving a comprehensive improvement in production benefits.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention discloses a loading and unloading device, including a movable frame, on which a push-pull mechanism is provided. The push-pull mechanism includes a telescopic mechanism, a push-pull plate, a hook mechanism, and a rotating mechanism. The telescopic end of the telescopic mechanism is horizontally arranged. The rear plate of the push-pull plate is fixedly connected to the telescopic end of the telescopic mechanism. The front plate of the push-pull plate is used to push the material plate placed on the material rack. The hook mechanism is installed on the push-pull plate. The hook mechanism includes a rotatable hook head. The hook head is located in front of the front plate of the push-pull plate. The hook head is used to correspond to the hooking hole of the material plate placed in the sintering furnace. The hook head is driven to rotate by the rotating mechanism. The hook head can be screwed into the hooking hole of the corresponding material plate on its rotation path.

[0006] Preferably, the telescopic mechanism includes a slide table, a linear slide rail, a push-pull linkage, and a drive assembly. The linear slide rail is horizontally mounted on the movable frame. The slide table is slidably connected to the linear slide rail. One end of the push-pull linkage is fixedly connected to the slide table, and the other end of the push-pull linkage is fixedly connected to the rear plate surface of the push-pull plate. The drive assembly is used to drive the slide table to move along the linear slide rail.

[0007] Preferably, there are four linear slide rails arranged in a rectangle on the movable frame, and the four corners of the slide table are fixedly connected to the sliders of the four linear slide rails respectively.

[0008] Preferably, the drive assembly includes a lead screw, a drive motor, and a reducer. The lead screw is rotatably connected to the movable frame, and a threaded sleeve is fixedly connected to the slide. The threaded sleeve is threadedly connected to the lead screw. The drive motor is mounted on the movable frame and drives the lead screw through the reducer.

[0009] Preferably, the drive assembly further includes a transmission shaft, and there are two lead screws and two reducers, one of which is an L-type reducer and the other is a T-type reducer. The two lead screws are arranged vertically. The motor shaft of the drive motor is connected to the input shaft of the T-type reducer. The first output shaft of the T-type reducer is coaxially connected to one of the lead screws. The second output shaft of the T-type reducer is coaxially connected to one end of the transmission shaft. The other end of the transmission shaft is connected to the input shaft of the L-type reducer. The output shaft of the L-type reducer is connected to the other lead screw.

[0010] Preferably, the bottom of the push-pull plate is provided with a support wheel, and the mobile frame is provided with a support plate for supporting the support wheel, the support plate being located below the push-pull plate's return and reset point.

[0011] Preferably, the hook mechanism further includes a hook transmission assembly; the transmission assembly includes a rotating shaft, a return spring, a return torsion spring, a bushing, a first driven rocker arm, a second driven rocker arm, a washer, a first retaining ring, and a second retaining ring; the push-pull plate is provided with a mounting hole, and the bushing is fitted into the mounting hole; the bushing is located at one end of the rear plate surface of the push-pull plate, which is a limiting flange, and the first retaining ring is clamped on one end of the bushing located on the front plate surface of the push-pull plate; the mounting end of the first driven rocker arm is provided with a fitting hole and a first limiting post, the fitting hole is fitted onto the bushing, and the rotating end of the first driven rocker arm is provided with a toggle rod; the fitting hole is located between the first limiting post and the toggle rod, and the rotating end of the first driven rocker arm is driven to rotate by a rotating mechanism; the washer is fitted onto the bushing, and the washer is located at one end of the first driven rocker arm, which is a limiting flange. Between the rocker arm and the rear plate of the push-pull plate; the rotating shaft is located inside the bushing, one end of the rotating shaft is fixedly connected to the hook head, and the other end of the rotating shaft is fixedly connected to the mounting end of the second driven rocker arm, and a limiting block is provided on the rotating shaft; the return spring is sleeved on the rotating shaft, and the return spring is located between the limiting block and the first retaining ring; the rotating end of the second driven rocker arm is located on the rotation path of the toggle lever; a second limiting post is provided in the middle of the second driven rocker arm, the return torsion spring is sleeved on the bushing, the second retaining ring is clamped on the rotating shaft, and the return torsion spring is located between the second retaining ring and the second driven rocker arm; the first torsion arm of the return torsion spring abuts against the first limiting post, and the second torsion arm of the return torsion spring abuts against the second limiting post.

[0012] Preferably, the mechanism includes two rows of hook mechanisms, which are horizontally spaced on the push-pull plate. Two adjacent hook mechanisms in each row form a group, and the transmission components of the two hook mechanisms in each group are mirror-image arranged. The rotating mechanism includes two sets of drive components, each corresponding to one of the two rows of hook mechanisms. Each drive component includes a telescopic rod and two vertically arranged drive links. One drive link is hinged to the rotating end of a forward-facing first driven rocker arm in the mirror image, and the other drive link is hinged to the rotating end of a reverse-facing first driven rocker arm in the mirror image. The fixed end of the telescopic rod is hinged to the rear plate surface of the push-pull plate, and the telescopic end of the telescopic rod is hinged to the rotating end of a first driven rocker arm in one of the corresponding rows of hook mechanisms.

[0013] Preferably, the bottom of the mobile frame is provided with self-locking casters.

[0014] This invention also discloses a MIM (Mechanical Injection Molding) feeding and discharging system, including a sintering furnace, a transfer cart, and the aforementioned loading and unloading device; the sintering furnace has a first feeding area and a second feeding area arranged sequentially from the inside to the outside along the depth direction, and the side walls of both the first and second feeding areas are provided with placement grooves for the feeding plates to slide in and out, the extension direction of the placement grooves being parallel to the depth direction; there are two transfer carts, which are arranged side by side between the furnace opening of the sintering furnace and the loading and unloading device; the transfer cart is provided with a material rack, and the material rack is provided with a placement channel for the push-pull plate of the loading and unloading device to enter and exit, the side wall of the placement channel is provided with a temporary storage groove for the feeding plates to slide in and out, the extension direction of the temporary storage groove being parallel to the depth direction of the sintering furnace; the extension direction of the extension end of the extension mechanism of the loading and unloading device is parallel to the depth direction of the sintering furnace.

[0015] The present invention achieves the following technical effects compared to the prior art: This invention introduces a loading and unloading device, which divides the loading process into three steps: 1. Aligning the first material rack with and pressing it against the furnace opening of the sintering furnace, and pushing the material plate in the rack into the second discharge zone of the sintering furnace using the push-pull plate of the loading and unloading device; 2. Removing the first material rack, moving the loading and unloading device forward, and pushing the material plate in the second discharge zone into the first discharge zone using the push-pull plate of the loading and unloading device; 3. Moving the loading and unloading device back to its original position, aligning the second material rack with and pressing it against the furnace opening of the sintering furnace, and pushing the material plate in the second material rack into the second discharge zone using the push-pull plate of the loading and unloading device, thus completing the loading of the sintering furnace; the unloading process also divides into three steps: 1. Aligning the second material rack with and pressing it against the furnace opening of the sintering furnace, and using the hook mechanism on the push-pull plate of the loading and unloading device to unload the material plate. 1. The material is pulled from the second feeding area into the second material rack; 2. The second material rack is removed, and the loading and unloading device is aligned with and pressed against the furnace opening of the sintering furnace. The material plate is pulled from the first feeding area into the second feeding area through the hook mechanism; 3. The loading and unloading device is moved backward, and the first material rack is aligned with and pressed against the sintering furnace. The loading and unloading device is aligned with and pressed against the first material rack. The material plate from the second feeding area is pulled to the first material rack through the hook mechanism, completing the unloading of the sintering furnace. Previously, loading and unloading the sintering furnace required manual handling of the material plate dozens of times (eighty times for the Hengpu 480-PRO sintering furnace). The introduction of the loading and unloading device can optimize this to a six-step operation, reducing manpower and significantly improving production efficiency, thus achieving a comprehensive improvement in production benefits. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained by analyzing these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the MIM feeding and discharging system in an embodiment of the present invention; Figure 2 This is a schematic diagram of the loading and unloading device in an embodiment of the present invention; Figure 3 This is a schematic diagram of the loading and unloading device (with the push-pull plate in its original position) in an embodiment of the present invention. Figure 4 This is a schematic diagram of the loading and unloading device (with the push-pull plate in an outward-moving state) in an embodiment of the present invention; Figure 5 This is an exploded structural diagram of the loading and unloading device in an embodiment of the present invention; Figure 6 This is a schematic diagram of the hook mechanism and the rotating mechanism on the rear plate surface of the push-pull plate in an embodiment of the present invention; Figure 7 This is a schematic diagram of the separate structure of the push-pull plate, the hook mechanism, and the rotating mechanism in an embodiment of the present invention; Figure 8 This is a schematic diagram of the rotating mechanism in an embodiment of the present invention; Figure 9 This is an exploded view of the hook mechanism in an embodiment of the present invention; Figure 10 This is a schematic diagram of the hook mechanism structure at the rear surface of the push-pull plate in an embodiment of the present invention; Figure 11 This is a schematic diagram of the hook mechanism structure at the front surface of the push-pull plate in an embodiment of the present invention; Figure 12 This is a schematic diagram of the process of the rotating mechanism driving the hook claw mechanism (a three-dimensional view of the rear plate of the push-pull plate) in an embodiment of the present invention; Figure 13 This is a schematic diagram of the process of the rotating mechanism driving the hook claw mechanism (front view of the rear plate of the push-pull plate) in an embodiment of the present invention; Figure 14 This is a schematic diagram of the process of the rotating mechanism driving the hook claw mechanism (three-dimensional view of the front plate of the push-pull plate) in an embodiment of the present invention; Figure 15 This is a schematic diagram illustrating the process of the hook head of the hook mechanism in an embodiment of the present invention being screwed into the hooking hole of the material plate; Figure 16 This is a cross-sectional view of the sintering furnace in an embodiment of the present invention; Figure 17 for Figure 16 A partially enlarged structural diagram of the furnace opening of the sintering furnace; Figure 18 This is a schematic diagram of the structure of the transfer cart and material rack (sectional view) in an embodiment of the present invention; Figure 19 for Figure 18 A partially enlarged structural diagram of the central feed rack (section view); Figure 20 This is a schematic diagram of the loading and unloading process of the MIM feeding and discharging system in an embodiment of the present invention; Figure 21 This is a schematic diagram illustrating the process of moving the second material rack between the pre-sintering furnace and the loading and unloading device during the feeding of the sintering furnace in an embodiment of the present invention; Figure 22 This is a schematic diagram illustrating the process of aligning the second material rack with the sintering furnace during material feeding in an embodiment of the present invention. Figure 23 This is a schematic diagram of the process in which the push-pull plate extends, the hook rotates, and hooks all the material plates in the second placement area in the loading and unloading device of this invention. Figure 24 This is a schematic diagram illustrating the process by which the push-pull plate in the loading and unloading device of the present invention retracts the material plate in the second placement area to the second material rack. Figure 25 This is a schematic diagram illustrating the process of removing the first material rack in an embodiment of the present invention; Figure 26 This is a schematic diagram of the process after the loading and unloading device is moved forward to align with the sintering furnace in an embodiment of the present invention; Figure 27 This is a schematic diagram of the process in which the push-pull plate extends, the hook rotates, and hooks all the material plates in the first placement area of ​​the sintering furnace in the loading and unloading device of this embodiment of the invention. Figure 28 This is a schematic diagram illustrating the process of the push-pull plate carrying the material plate from the first placement area to the second placement area in the loading and unloading device of this invention. Figure 29 This is a schematic diagram illustrating the process of moving the loading and unloading device backward in an embodiment of the present invention, moving the first material rack to the middle of the sintering furnace and the loading and unloading device; Figure 30 This is a schematic diagram of the process after the first material rack is aligned with the sintering furnace and the loading and unloading device is aligned with the first material rack in an embodiment of the present invention. Figure 31 This is a schematic diagram of the process in which the push-pull plate extends, the hook rotates, and hooks all the material plates in the first placement area in the loading and unloading device of the present invention. Figure 32 This is a schematic diagram illustrating the process of the push-pull plate carrying the material plate retracting to the first material rack in the loading and unloading device of this invention. Figure 33 This is a schematic diagram illustrating the process of feeding materials into the sintering furnace in an embodiment of the present invention; Figure 34 This is a schematic diagram of the initial state of the hook mechanism before it hooks the material plate in an embodiment of the present invention (rear view of the push-pull plate); Figure 35 This is a schematic diagram of the process in which the return spring is compressed after the hook mechanism hits the material plate and is pushed into place in an embodiment of the present invention (rear view of the push-pull plate). Figure 36 This is a schematic diagram of the process of the hook head of the hook mechanism in an embodiment of the present invention being screwed into the hook hole of the material plate (rear view of the push-pull plate). Figure 37 This is a schematic diagram of the initial state of the hook mechanism before it hooks the material plate in an embodiment of the present invention (front view of the push-pull plate). Figure 38 This is a schematic diagram of the process in which the return spring is compressed after the hook mechanism hits the material plate and is pushed into place in an embodiment of the present invention (front view of the push-pull plate). Figure 39 This is a schematic diagram of the process of the hook head of the hook mechanism in an embodiment of the present invention being screwed into the hook hole of the material plate (front view of the push-pull plate). Figure 40 This is a schematic diagram of the situation where the hook head in the hook mechanism of the present invention is stuck in the material plate because it is not screwed into the hook hole; Figure 41 This is a schematic diagram of the working process of the reset torsion spring when the hook head is stuck by the material plate in an embodiment of the present invention; Figure 42 This is a schematic diagram of the compression process of the reset spring in an embodiment of the present invention; Figure 43 This is a schematic diagram of the manual handling process for loading and unloading materials in a traditional pre-sintering furnace.

[0018] Explanation of reference numerals in the attached figures: 1. Sintering furnace; 2. Material rack; 3. Loading and unloading device; 4. Material plate; 5. Transfer cart; 10. First feeding area; 11. Second feeding area; 101. Place the chute; 21. Placement of passageways; 201. Temporary storage chute; 30. Mobile rack; 31. Push-pull mechanism; 301. Push-pull plate; 302. Hook mechanism; 303. Slide table; 304. Linear slide rail; 305. Push-pull linkage; 306. Slider; 307. Lead screw; 308. Drive motor; 309. Reducer; 310. Transmission shaft; 311. Support wheel; 312. Support plate; 313. Threaded sleeve; 314. Hook head; 315. Rotary shaft; 316. Limit block; 317. Return spring; 318. Return torsion spring; 319. Bushing; 320. First 321. Second follower rocker arm; 322. Washer; 323. First retaining ring; 324. Second retaining ring; 325. First limiting post; 326. Actuating rod; 327. Limiting flange; 328. Second limiting post; 329. Telescopic rod; 330. Drive linkage; 331. Hinge shaft; 332. Connecting shaft; 333. Mounting shaft; 334. Movable self-locking caster; 335. Lead screw seat; 336. Mounting hole; 337. Linkage hole; 338. Hinge hole; 41. Hook hole; 51. Self-locking casters for easy transport. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments analyzed and obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide a loading and unloading device and a MIM feeding and discharging system to solve the problems existing in the prior art. By introducing the loading and unloading device, the repetitive operation of manually moving the material plates dozens of times in the original sintering furnace loading and unloading is optimized to be completed in only six steps, reducing manpower and significantly improving production efficiency, thereby achieving a comprehensive improvement in production benefits.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 like Figures 1 to 43As shown, this embodiment provides a loading and unloading device that can be used in MIM sintering production to replace manual loading and unloading. MIM stands for Metal Injection Molding, a technology that combines the advantages of powder metallurgy and plastic injection molding, overcoming the limitations of traditional metal powder molding processes in terms of product shape. Specifically, the loading and unloading device 3 includes a moving frame 30 and a push-pull mechanism 31, which is mounted on the moving frame 30. The push-pull mechanism 31 includes a push-pull plate 301, a hook mechanism 302, a telescopic mechanism, and a rotating mechanism. The telescopic end of the telescopic mechanism is horizontally positioned for free horizontal extension and retraction. The rear plate of the push-pull plate 301 is fixedly connected to the telescopic end of the telescopic mechanism, allowing the push-pull plate 301 to move forward and backward as the telescopic end of the telescopic mechanism extends and retracts. The front plate of the push-pull plate 301 is used to push the material plate 4 placed on the material rack 2. The pusher rack 2 is provided with a placement channel 21, and the side wall of the placement channel 21 is provided with multiple temporary storage grooves 201. Multiple material plates 4 are placed horizontally in the temporary storage grooves 201 respectively to achieve the placement effect. A hook mechanism 302 is installed on the push-pull plate 301. The hook mechanism 302 includes a rotatable hook head 314, which is located in front of the front plate surface of the push-pull plate 301. The hook head 314 is driven to rotate by a rotating mechanism. The hook head 314 is used to correspond to the hooking hole 41 of the material plate 4 placed in the sintering furnace 1. The hook head 314 can screw into the hooking hole 41 of the corresponding material plate 4 on its rotation path.

[0023] The number of hook mechanisms 302 is set according to the total number of hook holes 41. For example: if there are X material plates 4 on the material rack 2, and each material plate 4 has one hook hole 41, for a total of X hook holes 41, then there will be X hook mechanisms 302; if there are X material plates 4 on the material rack 2, and each material plate 4 has two hook holes 41, for a total of 2X hook holes 41, then there will be 2X hook mechanisms 302.

[0024] Working principle: When feeding is required: Step 1 (Reference) Figure 20 (① and ②) Align the first material rack 2 with and press it against the furnace mouth of the sintering furnace 1, so that the temporary storage chute 201 is aligned with the placement chute 101 of the sintering furnace 1. Move the loading and unloading device 3 by moving the frame 30, so that the loading and unloading device 3 is pressed against the first material rack 2. The telescopic end of the telescopic mechanism of the push-pull device 31 extends and pushes the push-pull plate 301 outward, so that the push-pull plate 301 extends into the placement channel 21 of the material rack 2, and pushes the material plate 4 in the placement channel 21 from the furnace mouth into the placement chute 101 of the second feeding area 11 of the sintering furnace 1. Step Two (Reference) Figure 20In step ③), the telescopic end of the telescopic mechanism of the push-pull device 31 shortens to pull the push-pull plate 301 back, so that the push-pull plate 301 is reset, the first material rack 2 is removed, the loading and unloading device 3 is moved forward, so that the loading and unloading device 3 is aligned with and close to the furnace mouth of the sintering furnace 1, the telescopic end of the telescopic mechanism extends again to push the push-pull plate 301 outward into the second feeding area 11, and pushes the material plate 4 in the second feeding area 11 into the placement chute 101 of the first feeding area 10; Step 3 (Reference) Figure 20 (④) The push-pull plate 301 is reset, the loading and unloading device 3 is moved back and reset, the second material rack 2 is aligned with and pressed against the furnace mouth of the sintering furnace 1, the loading and unloading device 3 is aligned with and pressed against the second material rack 2, the telescopic end of the telescopic mechanism extends and pushes the push-pull plate 301 outward, so that the push-pull plate 301 pushes the material plate 4 in the placement channel 21 of the second material rack 2 into the placement chute 101 of the second feeding area 11 of the sintering furnace 1, and the feeding of the sintering furnace 1 is completed. The push-pull plate 301 of the push-pull device 31 is reset, the push-pull device 31 and the second material rack 2 are removed, and the sintering is waited for to be completed. When materials need to be cut: Step Four (Reference) Figure 20 ⑤ and ⑥ in the middle and Figure 22 , Figure 23 , Figure 24 Align the second material rack 2 with and press it against the furnace opening of the sintering furnace 1. Extend the telescopic end of the telescopic mechanism of the push-pull device 31 of the loading and unloading device 3, push the push-pull plate 301 outward, so that the push-pull plate 301 passes through the placement channel 21 of the second material rack 2 and extends into the second feeding area 11 of the sintering furnace 1. Align the hook heads 314 of each hook mechanism 302 with the hook holes 41 of each material plate 4, and drive the rotating mechanism to rotate the hook heads 314 so that the hook heads 314 screw into the hook holes 41 and hook the material plate 4 (see reference). Figures 34 to 39 Then the telescopic end of the telescopic mechanism retracts, causing the push-pull plate 301 to retract and pull the material plate 4 from the placement chute 101 of the second material feeding area 11 into the temporary storage chute 201 of the second material rack 2. Step 5 (Reference) Figure 20 ⑦ and Figure 25 , Figure 26 , Figure 27 , Figure 28Remove the second material rack 2, align the loading and unloading device 3 with and press it against the furnace opening of the sintering furnace 1, and push the push-pull plate 301 outward again through the telescopic mechanism of the push-pull device 31 so that the push-pull plate 301 passes through the second feeding area 11 of the sintering furnace 1 and extends into the first feeding area 10 of the sintering furnace 1. Align the hook heads 314 of each hook mechanism 302 with the hooking holes 41 of the material plate 4 in the first feeding area 10, and drive the rotating mechanism to rotate the hook heads 314 so that the hook heads 314 screw into the hooking holes 41 to hook the material plate 4. The telescopic end of the telescopic mechanism retracts and pulls the material plate 4 from the placement chute 101 of the first feeding area 10 of the sintering furnace 1 into the placement chute 101 of the second feeding area 11. Step Six (Reference) Figure 20 ⑧ and Figure 29 , Figure 30 , Figure 31 , Figure 32 , Figure 33 After the loading and unloading device 3 moves backward, the first material rack 2 is aligned with and pressed against the sintering furnace 1. After the loading and unloading device 3 is aligned with and pressed against the first material rack 2, the material plate 4 of the second feeding area 11 of the sintering furnace 1 is pulled to the first material rack 2 through the loading and unloading device 3, thus completing the unloading of the sintering furnace.

[0025] By introducing the loading and unloading device 3, the repetitive operation of manually handling the material plates dozens of times (eighty times for the Hengpu 480-PRO sintering furnace) in the original sintering furnace 1 has been optimized to be completed in only six steps, reducing manpower and significantly improving production efficiency, thus achieving a comprehensive improvement in production benefits.

[0026] In one embodiment, the telescopic mechanism includes a slide table 303, a linear slide rail 304, a push-pull linkage 305, and a drive assembly. The linear slide rail 304 is horizontally mounted on the movable frame 30, and the slide table 303 is slidably connected to the linear slide rail 304. The number of linear slide rails 304 is set as needed. One end of the push-pull linkage 305 is fixedly connected to the slide table 303, and the other end of the push-pull linkage 305 is fixedly connected to the rear plate surface of the push-pull plate 301. The drive assembly is used to drive the slide table 303 to move along the linear slide rail 304. When the drive assembly drives the slide table 303 to move forward or backward along the linear slide rail 304, it drives the push-pull linkage 305 to move outward or backward, which is equivalent to the telescopic movement of the entire telescopic mechanism. The end of the push-pull linkage 305 connected to the push-pull plate 301 is the telescopic end. The push-pull linkage 305 can push the push-pull plate 301 outward or pull it back.

[0027] In one embodiment, there are four linear guide rails 304, see reference. Figures 3 to 5As shown, four linear slide rails 304 are arranged in a rectangle on the movable frame 30. The four corners of the slide table 303 (which is rectangular) are fixedly connected to the sliders 306 of the four linear slide rails 304, thereby enabling the slide table 303 to move along the linear slide rails 304. Setting four linear slide rails 304 can improve the stability of the movement of the slide table 303.

[0028] In one embodiment, there are four push-pull linkages 305, see reference. Figures 3 to 5 As shown, the four push-pull linkages 305 are arranged in a rectangular pattern. The purpose of setting four push-pull linkages 305 is to improve the support force on the push-pull plate 301 and prevent the push-pull plate 301 from deforming and being damaged due to the influence of push-pull force.

[0029] In one embodiment, the drive assembly includes a lead screw 307, a drive motor 308, and a reducer 309. The lead screw 307 is rotatably connected to the movable frame 30. A threaded sleeve 313 is fixedly connected to the slide table 303, and the threaded sleeve 313 is threadedly connected to the lead screw 307. The drive motor 308 is mounted on the movable frame 30 and drives the lead screw 307 through the reducer 309. The number of lead screws 307 is set as needed. Driven by the drive motor 308 and the reducer 309, the lead screw 307 rotates forward or backward. Under the action of the threaded sleeve 313 and with the linear guidance of the linear slide rail 304, the rotational motion of the lead screw 307 is converted into the linear motion of the slide table 303, thereby realizing the forward or backward motion of the slide table 303 along the linear slide rail 304.

[0030] In one embodiment, the drive assembly further includes a drive shaft 310. There are two lead screws 307 and two reducers 309. (See reference) Figure 3 and Figure 5As shown. One reducer 309 is an L-type reducer, and the other reducer 309 is a T-type reducer. Two lead screws 307 are arranged vertically, and a threaded sleeve 313 is provided at the bottom and top of the corresponding slide table 303, which is threadedly connected to the two lead screws 307 respectively. There is one drive motor 308. The motor shaft of the drive motor 308 is connected to the input shaft of the T-type reducer. The first output shaft of the T-type reducer is coaxially connected to one of the lead screws 307. The second output shaft of the T-type reducer is coaxially connected to one end of the transmission shaft 310. The other end of the transmission shaft 310 is connected to the input shaft of the L-type reducer. The output shaft of the L-type reducer is connected to the other lead screw 307. The transmission shaft 310 is arranged vertically. Preferably, the motor shaft of the drive motor 308 is arranged upwards, the T-type reducer is coaxially connected to the lead screw 307 located below, and the L-type reducer is coaxially connected to the lead screw 307 located above. The rotation of the motor shaft of drive motor 308 drives the input shaft of the T-type reducer to rotate, which in turn causes the first and second output shafts of the T-type reducer to rotate. The first output shaft drives one of the lead screws 307 to rotate. At the same time, the second output shaft drives the input shaft of the L-type reducer to rotate via transmission shaft 310, which in turn causes the output shaft of the L-type reducer to rotate, driving the other lead screw 307 to rotate. Thus, two lead screws 307 can be driven to rotate synchronously by a single drive motor 308.

[0031] In one embodiment, the bottom of the push-pull plate 301 is provided with a support wheel 311, and the movable frame 30 is provided with a support plate 312. The support plate 312 is used to support the support wheel 311. The support plate 312 is located below the return and reset point of the push-pull plate 301. In the initial state, the push-pull plate 301 is located directly above the support plate 312, and the support wheel 311 of the support plate 312 is supported on the support plate 312. When the slide table 303 moves outward (moves forward along the linear slide rail 304), the support wheel 311 of the push-pull plate 301 will move along the support plate 312, and eventually disengage from the support plate 312 and enter the placement channel 21 of the material rack 2 or the furnace opening of the sintering furnace 1. The bottom surface of the placement channel 21 of the material rack 2, the bottom surface of the feeding area of ​​the sintering furnace 1, and the support plate 312 are flush. As the slide table 303 moves back (reverses along the linear slide rail 304), during the retraction of the push-pull plate 301, the support wheel 311 of the push-pull plate 301 will move again from the placement channel 21 of the material rack or the furnace opening of the sintering furnace 1 to the support plate 312, where it will be supported. The support plate 312 is mainly used to support the push-pull plate 301 and prevent the push-pull connecting rod 305 from bending and deforming due to the weight of the push-pull plate 301 and the hook mechanism 302, which would prevent the push-pull plate 301 from accurately extending into the furnace opening of the sintering furnace 1 or passing through the placement channel 21 of the material rack 2.

[0032] In one embodiment, the movable frame 30 is provided with a lead screw seat 335, the lead screw seat 335 is provided with a threaded hole, and the lead screw 307 is threadedly connected to the threaded hole.

[0033] In one embodiment, the push-pull plate 301 is provided with a connecting rod hole 337, and the slide table 303 is provided with a corresponding connecting hole. One end of the push-pull connecting rod 305 is fixedly connected to the connecting rod hole 337, and the other end of the push-pull connecting rod 305 is fixedly connected to the connecting hole.

[0034] In one embodiment, there are four lead screw holders 335, arranged in pairs. One pair is installed at the front end of the movable frame 30 (facing the sintering furnace 1) and arranged vertically. The other pair is installed at the rear end of the movable frame 30 (facing away from the sintering furnace 1) and arranged vertically. The drive motor 308 and the reducer 309 are both installed on the lead screw holders 335 at the rear end of the movable frame 30, wherein the drive motor 308 and the T-type reducer are installed on the lower lead screw holder 335, and the L-type reducer is installed on the upper lead screw holder 335.

[0035] In one embodiment, the hook mechanism 302 further includes a transmission assembly. The transmission assembly includes a rotating shaft 315, a return spring 317, a return torsion spring 318, a bushing 319, a first driven rocker arm 320, a second driven rocker arm 321, a washer 322, a first retaining ring 323, and a second retaining ring 324. The push-pull plate 301 has a mounting hole 336, and the bushing 319 is fitted into the mounting hole 336, allowing the bushing 319 to move back and forth along the mounting hole 336. A limiting flange 327 is located at one end of the bushing 319 on the rear surface of the push-pull plate 301, and the first retaining ring 323 is clamped at one end of the bushing 319 on the front surface of the push-pull plate 301. With the cooperation of the limiting flange 327 and the first retaining ring 323, the bushing 319 is prevented from dislodging from the mounting hole 336. The mounting end of the first driven rocker arm 320 is provided with a sleeve hole and a first limiting post 325. The sleeve hole is fitted onto the bushing 319, and the rotating end of the first driven rocker arm 320 is provided with a toggle rod 326. The sleeve hole is located between the first limiting post 325 and the toggle rod 326. The rotating end of the first driven rocker arm 320 is driven to rotate by a rotating mechanism. A shim 322 is fitted onto the bushing 319 and is located between the first driven rocker arm 320 and the rear plate surface of the push-pull plate 301. A rotating shaft 315 is fitted inside the bushing 319. One end of the rotating shaft 315 is fixedly connected to the hook head 314, and the other end of the rotating shaft 315 is fixedly connected to the mounting end of the second driven rocker arm 321. A limiting block 316 is provided on the rotating shaft 315, preferably a sector-shaped block. A return spring 317 is sleeved on the rotating shaft 315, and is located between the limiting block 316 and the first retaining ring 323. The rotating end of the second driven rocker arm 321 is located on the rotation path of the actuating rod 326, so as to be pushed to rotate by the actuating rod 326. A second limiting post 328 is provided in the middle of the second driven rocker arm 321. A return torsion spring 318 is sleeved on the bushing 319, and a second retaining ring 324 is clamped on the rotating shaft 315. The return torsion spring 318 is located between the second retaining ring 324 and the second driven rocker arm 321. The first torsion arm of the return torsion spring 318 abuts against the first limiting post 325. The second torsion arm of the return torsion spring 318 abuts against the second limiting post 328, so that the actuating rod 326 abuts against the rotating end of the second driven rocker arm 321.

[0036] The working principle is as follows: First, driven by the push-pull plate 301, the hook head 314 of the hook mechanism 302 moves forward and aligns with the hooking hole 41 of the material plate 4. During this process, the limiting block 316 in the hook mechanism 302 will contact the end face of the material plate 4. Then, the return spring 317 is compressed. This compression amount L is used to compensate for the uneven distance between the end faces of different layers of material plates 4 caused by the expansion displacement of the material plate 4 during sintering, so that the position of the hook head 314 relative to the hooking hole 41 on the material plate 4 remains unchanged, avoiding the special situation where the hook head 314 cannot hook the material plate 4 due to misalignment with the hooking hole 41 (see reference). Figure 40 and Figure 41 (as shown); Then, the rotating mechanism drives the rotating end of the first driven rocker arm 320 to rotate around the mounting end of the first driven rocker arm 320. This, in turn, via the actuating rod 326, actuates the rotating end of the second driven rocker arm 321 to rotate around the mounting end of the first driven rocker arm 320. This, in turn, drives the rotating shaft 315 to rotate, causing the originally horizontal hook head 314 to rotate downwards and screw into the hooking hole 41 of the material plate 4 (see reference). Figure 15 , Figures 34 to 39 (As shown), then the push-pull plate 301 moves back to its original position, which can then hook out the material plate 4.

[0037] In one embodiment, the hook mechanism 302 has two rows, which are horizontally spaced on the push-pull plate 301. Two adjacent hook mechanisms 302 in each row form a group, and the transmission components of the two hook mechanisms 302 in a group are mirror images of each other. Two rows of hook mechanisms 302 are provided because the end of the material plate 4 typically has two hooking holes 41. The two hook mechanisms 302 in the same row of the two rows correspond to the two hooking holes 41 at the end of one material plate 4. The rotating mechanism includes two sets of drive components, each corresponding to one of the two rows of hook mechanisms 302. Each drive component includes a telescopic rod 329 and two vertically arranged drive linkages 330. The telescopic rod 329 can be an electric telescopic rod, a pneumatic telescopic rod, or a hydraulic telescopic rod. One drive link 330 is hinged to the rotating end of the forward-facing first driven rocker arm 320 in a mirror image arrangement, and the other drive link 330 is hinged to the rotating end of the reverse-facing first driven rocker arm 320 in a mirror image arrangement. Preferably, the drive link 330 is provided with a hinge hole 338, and the rotating end of the first driven rocker arm 320 is provided with a hinge shaft 331, which is hinged to the hinge hole 338. The fixed end of the telescopic rod 329 is hinged to the rear plate surface of the push-pull plate 301, and the telescopic end of the telescopic rod 329 is hinged to the rotating end of one of the first driven rocker arms 320 in the corresponding row of hook mechanisms 302. Preferably, the telescopic end of the telescopic rod 329 is hinged to the rotating end of the first driven rocker arm 320 of the hook mechanism 302 located in the middle position in the corresponding row of hook mechanisms 302.

[0038] Working principle, taking one set of driver components as an example: The telescopic end of the telescopic rod 329 extends and retracts, which drives the first driven rocker arm 320 connected to it to rotate. This, in turn, drives one of the drive links 330 to rise or fall, and the other drive link 330 to fall or rise. That is, the two drive links 330 move in opposite directions. If one rises, the other falls. This causes the rotating ends of the two mirror-shaped first driven rocker arms 320 in one group of the single-row hook mechanism 302 to rotate in opposite directions. That is, one rotating end of the first driven rocker arm 320 rotates upward, and the other rotating end of the first driven rocker arm 320 rotates downward. Since the rotating ends of the two first driven rocker arms 320 are facing opposite directions, the rotation is converted to the mounting ends of both first driven rocker arms 320 rotating downward or upward. That is, the mounting ends of the two first driven rocker arms 320 rotate in the same direction. Finally, this is converted to the hook head 314, that is, the hook head 314 of the single-row hook mechanism 302 rotates upward or downward synchronously. Furthermore, when the drive linkage 330 rises or falls, it causes the first driven rocker arm 320 to rotate. The first driven rocker arm 320 transmits force to the second driven rocker arm 321 through the reset torsion spring 319, causing it to rotate. The hook head 314, which is fixedly connected to the second driven rocker arm 321, also rotates. When the hook head 314 is not in position and gets stuck on the material plate 4, the reset torsion spring 319 will be twisted, and the first driven rocker arm 320 can still rotate, so as to ensure that the drive linkage 330 will not be stuck, and to avoid the situation where a single hook head 314 gets stuck, causing the other hook heads 314 to be unable to rotate.

[0039] In one embodiment, the push-pull plate 301 is provided with a mounting shaft 333 at both the top and bottom. The fixed end of a telescopic rod 329 is hinged to the mounting shaft 333 at the top, with the telescopic end facing downwards. It is hinged to the rotating end of a first driven rocker arm 320 in one of the rows of hook mechanisms 302 via a connecting shaft 332. The fixed end of another telescopic rod 329 is hinged to the mounting shaft 333 at the bottom, with the telescopic end facing upwards. It is hinged to the rotating end of a first driven rocker arm 320 in another row of hook mechanisms 302 via a connecting shaft 332.

[0040] In one embodiment, the bottom of the mobile frame 30 is provided with self-locking casters 334, which can be moved after being unlocked and can be positioned after being locked.

[0041] Example 2 like Figures 1 to 43As shown, this embodiment provides a MIM feeding and discharging system, including a sintering furnace 1, a transfer cart 5, and the loading and unloading device 3 from Embodiment 1. The sintering furnace 1 has a first feeding area 10 and a second feeding area 11 arranged sequentially from the inside to the outside along the depth direction. Each of the first feeding area 10 and the second feeding area 11 has a placement chute 101 on its sidewall, through which the feeding plate 4 slides in and out. The extension direction of the placement chute 101 is parallel to the depth direction. There are two transfer carts 5, positioned between the furnace opening of the sintering furnace 1 and the loading and unloading device 3. Each transfer cart 5 has a material rack 2, resulting in two material racks 2. The transfer carts 5 allow for the movement of the material racks 2. Each material rack 2 has a placement channel 21, which allows the push-pull plate 301 to enter and exit. The sidewall of the placement channel 21 has a temporary storage chute 201, through which the feeding plate 4 slides in and out. The extension direction of the temporary storage chute 201 is parallel to the depth direction of the sintering furnace 1. The extension direction of the extension end of the extension mechanism of the loading and unloading device 3 is parallel to the depth direction of the sintering furnace 1.

[0042] Working principle: When feeding is required: Step 1 (Reference) Figure 20 (① and ② in the text), move the first transfer car 5 so that the first material rack 2 is aligned with and close to the furnace mouth of the sintering furnace 1, move the loading and unloading device 3 by moving the frame 30 so that the loading and unloading device 3 is close to the first material rack 2, and push the material plate 4 in the first material rack 2 into the placement chute 101 of the second discharge area 11 of the sintering furnace 1 through the loading and unloading device 3. Step Two (Reference) Figure 20 (③) Remove the first transfer car 5, move the loading and unloading device 3 forward so that the loading and unloading device 3 is aligned with and close to the furnace mouth of the sintering furnace 1, and push the material plate 4 in the second feeding area 11 into the placement chute 101 of the first feeding area 10. Step 3 (Reference) Figure 20 (④) The loading and unloading device 3 moves back to its original position, moves the second transfer car 5, aligns the second material rack 2 with and presses it against the furnace mouth of the sintering furnace 1, aligns the loading and unloading device 3 with and presses it against the second material rack 2, and pushes the material plate 4 in the second material rack 2 into the placement chute 101 of the second feeding area 11 of the sintering furnace 1 to complete the loading of the sintering furnace 1. The push-pull device 31 and the second material rack 2 are removed, and the sintering is waited for to be completed. When materials need to be cut: Step Four (Reference) Figure 20 ⑤ and ⑥ in the middle and Figure 22 , Figure 23 , Figure 24Move the second transfer car 5, align the second material rack 2 with and press it against the furnace mouth of the sintering furnace 1, and pull the material plate 4 from the placement chute 101 of the second feeding area 11 into the temporary storage chute 201 of the second material rack 2 through the hook mechanism 302 of the loading and unloading device 3. Step 5 (Reference) Figure 20 ⑦ and Figure 25 , Figure 26 , Figure 27 , Figure 28 Remove the second transfer car 5, align the loading and unloading device 3 with and press it against the furnace mouth of the sintering furnace 1, and pull the material plate 4 from the placement chute 101 of the first discharge area 10 of the sintering furnace 1 into the placement chute 101 of the second discharge area 11 through the hook mechanism 302 of the loading and unloading device 3. Step Six (Reference) Figure 20 ⑧ and Figure 29 , Figure 30 , Figure 31 , Figure 32 , Figure 33 The loading and unloading device 3 moves backward, moves the first transfer car 5, aligns the first material rack 2 with and presses it against the sintering furnace 1, aligns the loading and unloading device 3 with and presses it against the first material rack 2, and pulls the material plate 4 of the second discharge area 11 of the sintering furnace 1 to the first material rack 2 through the loading and unloading device 3, thus completing the unloading of the sintering furnace.

[0043] In one embodiment, the bottom of the transfer cart 5 is provided with transfer self-locking casters 51. After the transfer self-locking casters 51 are unlocked, the transfer cart 5 can be moved, and after they are locked, the transfer cart 5 can be positioned.

[0044] In one embodiment, the rack 2 is a box-type rack, roughly rectangular in shape, and the matching push-pull plate 301 is a rectangular plate. Of course, the rack 2 can also be other types of racks, such as a frame-type rack.

[0045] In actual operation, manual labor can also replace the loading and unloading device.

[0046] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A loading and unloading device, characterized in that, The device includes a movable frame, on which a push-pull mechanism is mounted. The push-pull mechanism includes a telescopic mechanism, a push-pull plate, a hook mechanism, and a rotating mechanism. The telescopic end of the telescopic mechanism is horizontally positioned. The rear plate of the push-pull plate is fixedly connected to the telescopic end of the telescopic mechanism. The front plate of the push-pull plate is used to push a material plate placed on a material rack. The hook mechanism is mounted on the push-pull plate and includes a rotatable hook head located in front of the front plate of the push-pull plate. The hook head is used to correspond to the hooking hole of the material plate placed in the sintering furnace. The hook head is driven to rotate by the rotating mechanism, and the hook head can screw into the corresponding hooking hole of the material plate along its rotation path.

2. The loading and unloading device according to claim 1, characterized in that, The telescopic mechanism includes a slide table, a linear slide rail, a push-pull linkage, and a drive assembly. The linear slide rail is horizontally mounted on the movable frame. The slide table is slidably connected to the linear slide rail. One end of the push-pull linkage is fixedly connected to the slide table, and the other end of the push-pull linkage is fixedly connected to the rear plate surface of the push-pull plate. The drive assembly is used to drive the slide table to move along the linear slide rail.

3. The loading and unloading device according to claim 2, characterized in that, There are four linear slide rails, which are arranged in a rectangle on the movable frame. The four corners of the slide table are fixedly connected to the sliders of the four linear slide rails.

4. The loading and unloading device according to claim 2 or 3, characterized in that, The drive assembly includes a lead screw, a drive motor, and a reducer. The lead screw is rotatably connected to the movable frame. A threaded sleeve is fixedly connected to the slide, and the threaded sleeve is threadedly connected to the lead screw. The drive motor is mounted on the movable frame and drives the lead screw through the reducer.

5. The loading and unloading device according to claim 4, characterized in that, The drive assembly also includes a transmission shaft, and there are two lead screws and two reducers. One of the reducers is an L-type reducer, and the other is a T-type reducer. The two lead screws are arranged vertically. The motor shaft of the drive motor is connected to the input shaft of the T-type reducer. The first output shaft of the T-type reducer is coaxially connected to one of the lead screws. The second output shaft of the T-type reducer is coaxially connected to one end of the transmission shaft. The other end of the transmission shaft is connected to the input shaft of the L-type reducer. The output shaft of the L-type reducer is connected to the other lead screw.

6. The loading and unloading device according to claim 4, characterized in that, The bottom of the push-pull plate is provided with support wheels, and the mobile frame is provided with a support plate for supporting the support wheels. The support plate is located below the push-pull plate's return and reset position.

7. The loading and unloading device according to claim 1, characterized in that, The hook mechanism further includes a hook transmission assembly; the transmission assembly includes a rotating shaft, a return spring, a return torsion spring, a bushing, a first driven rocker arm, a second driven rocker arm, a washer, a first retaining ring, and a second retaining ring; the push-pull plate is provided with a mounting hole, and the bushing is fitted into the mounting hole; the bushing is located at one end of the rear plate of the push-pull plate with a limiting flange, and the first retaining ring is clamped on one end of the bushing located on the front plate of the push-pull plate; the mounting end of the first driven rocker arm is provided with a fitting hole and a first limiting post, the fitting hole is fitted onto the bushing, and the rotating end of the first driven rocker arm is provided with a toggle rod; the fitting hole is located between the first limiting post and the toggle rod, and the rotating end of the first driven rocker arm is driven to rotate by a rotating mechanism; the washer is fitted onto the bushing, and the washer is located at the first driven rocker arm. Between the rocker arm and the rear plate of the push-pull plate; the rotating shaft is located inside the bushing, one end of the rotating shaft is fixedly connected to the hook head, and the other end of the rotating shaft is fixedly connected to the mounting end of the second driven rocker arm, and a limiting block is provided on the rotating shaft; the return spring is sleeved on the rotating shaft, and the return spring is located between the limiting block and the first retaining ring; the rotating end of the second driven rocker arm is located on the rotation path of the toggle lever; a second limiting post is provided in the middle of the second driven rocker arm, the return torsion spring is sleeved on the bushing, the second retaining ring is clamped on the rotating shaft, and the return torsion spring is located between the second retaining ring and the second driven rocker arm; the first torsion arm of the return torsion spring abuts against the first limiting post, and the second torsion arm of the return torsion spring abuts against the second limiting post.

8. The loading and unloading device according to claim 7, characterized in that, The device includes two rows of hook mechanisms, horizontally spaced on the push-pull plate. Two adjacent hook mechanisms in each row form a group, and the transmission components of the two hook mechanisms in each group are mirror-image arranged. The rotating mechanism includes two sets of drive components, each corresponding to one of the two rows of hook mechanisms. Each drive component includes a telescopic rod and two vertically arranged drive links. One drive link is hinged to the rotating end of a forward-facing first driven rocker arm in the mirror image, and the other drive link is hinged to the rotating end of a reverse-facing first driven rocker arm in the mirror image. The fixed end of the telescopic rod is hinged to the rear plate surface of the push-pull plate, and the telescopic end of the telescopic rod is hinged to the rotating end of a first driven rocker arm in one of the corresponding rows of hook mechanisms.

9. The loading and unloading device according to claim 1, characterized in that, The bottom of the mobile frame is equipped with self-locking casters.

10. A MIM (Mechanical Inlet / Outlet) feeding and discharging system, characterized in that, The system includes a sintering furnace, a transfer cart, and a loading / unloading device as described in any one of claims 1-9. The sintering furnace has a first feeding area and a second feeding area arranged sequentially from the inside to the outside along the depth direction. The side walls of both the first and second feeding areas are provided with placement grooves for the feeding plates to slide in and out, the extension direction of which is parallel to the depth direction. There are two transfer carts, positioned between the furnace opening of the sintering furnace and the loading / unloading device. Each transfer cart is equipped with a material rack, which has a placement channel for the push-pull plate of the loading / unloading device to enter and exit. The side wall of the placement channel has a temporary storage groove for the feeding plates to slide in and out, the extension direction of which is parallel to the depth direction of the sintering furnace. The telescopic end of the telescopic mechanism of the loading / unloading device extends parallel to the depth direction of the sintering furnace.

Images