A continuous directional solidification sintering furnace

Abstract

The application discloses a continuous directional solidification sintering furnace, which comprises a feeding platform, a preheating chamber, a transfer chamber and a discharging platform from left to right on a supporting seat, and is separated by vacuum heat insulation valves between two chambers; a sintering chamber is arranged above the transfer chamber, and a cooling area is arranged at the right side of the transfer chamber; sintering materials are pushed by a pushing tool to make a next boat push a previous boat to flow in the sintering furnace; a hearth is arranged at the top of the sintering chamber; and the continuous directional solidification sintering furnace combines multiple independent processes to realize continuous production, thereby improving the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of sintering technology, specifically to a continuous directional solidification sintering furnace. Background Technology

[0002] Directional solidification, also known as directional crystallization, is a process that causes metals or alloys to grow crystals in a directional manner within a melt. Directional solidification technology establishes a temperature gradient in a specific direction within the mold, allowing the molten alloy to solidify and be cast along the opposite direction of heat flow, according to the desired crystal orientation. This process can significantly improve the overall performance of high-temperature alloys.

[0003] Gas pressure infiltration involves first forming a preform from high-melting-point material particles, then placing a low-melting-point material on top of the high-melting-point preform. The low-melting-point material melts into a liquid and permeates into the preform through capillary force. To improve the infiltration rate and quality, an inert gas is added during the infiltration process to create pressure, allowing the low-melting-point material to infiltrate into the high-melting-point preform, thus producing a composite material.

[0004] When using conventional vacuum furnaces or atmosphere-protected furnaces for copper sintering (or casting), shrinkage cavities can occur at the final solidification point due to thermal field issues, reducing material utilization. The entire sintering process in conventional vacuum furnaces or atmosphere-protected furnaces for copper sintering (or casting) is relatively long. From room temperature to above the melting point of copper, holding at that temperature for 6 hours for infiltration, followed by cooling, the entire sintering process takes 24-28 hours.

[0005] There is a need for a multifunctional furnace that integrates vacuum, atmosphere protection, and pressure sintering functions within a single furnace, enabling zoned control and the combination of multiple processes. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides a continuous directional solidification sintering furnace.

[0007] The technical solution of the present invention is as follows: a continuous directional solidification sintering furnace, comprising a support base, wherein the support base includes, from left to right, a feeding platform, a preheating chamber, a transfer chamber, and a discharge platform, which are connected or separated from each other by vacuum insulation valves; a sintering chamber is provided above the transfer chamber and communicates with it, and a cooling zone is provided between the transfer chamber and the vacuum insulation valve located on the right side of the transfer chamber; the support base is provided with multiple material boats that flow sequentially in the feeding platform, preheating chamber, transfer chamber, sintering chamber, cooling zone, and discharge platform; the support base is provided with a pushing tool for driving the material boats from the feeding platform into the preheating chamber, and the material boat in contact with the pushing tool drives the next material boat; a transmission chain is provided on the feeding platform to assist the pushing tool in driving the material boats;

[0008] The sintering chamber has a furnace chamber at the top, and a feed inlet is located at the center of the bottom plate of the furnace chamber.

[0009] The support base located below the transfer chamber is equipped with a telescopic rod that drives the material boat into the sintering chamber. The top of the telescopic rod passes through the bottom of the transfer chamber and is slidably connected to the bottom of the transfer chamber. The top of the telescopic rod is equipped with a carrier plate that supports the material boat. The carrier plate is slidably sealed to the feed inlet. The bottom of the telescopic rod is connected to the drive motor.

[0010] Furthermore, the base plate is provided with an opening and closing structure for rotating and controlling the opening and closing of the feed inlet;

[0011] A gas exchange tank is provided on the inner wall of the sintering chamber and is fixedly connected to the inner wall of the sintering chamber. A first gear is sleeved on the outer wall of the gas exchange tank to drive the opening and closing structure to rotate. A plurality of air outlet holes are provided on the lower side wall of the gas exchange tank, and a plurality of air intake holes are provided on the upper side wall of the gas exchange tank. The first gear is provided with a plurality of gas exchange holes that correspond one-to-one with the air outlet holes and the air intake holes.

[0012] The opening and closing structure includes multiple splicing plates that are spliced ​​and closed together, a traction rod, and a fourth gear that is rotatably sleeved on the base plate; one corner of the splicing plate is rotatably connected to the side wall of the feed inlet; one end of the traction rod is fixedly connected to the other corner of the splicing plate, and the other end of the traction rod is rotatably connected to the inner wall of the fourth gear.

[0013] A second gear is threaded onto the telescopic rod located at the top of the support base. The second gear meshes with the first gear through a third gear. The third gear passes through the inner wall of the transfer chamber and is rotatably connected to the inner wall of the transfer chamber.

[0014] Explanation: By setting up a splicing opening and closing structure, the splicing plate can be moved to other areas of the bottom plate when opening and closing the feed inlet, without occupying extra space. Moreover, it opens and closes around the center of the feed inlet, unlike other structures that gradually expand from the side, thus affecting the entry of the material boat from the center of the sintering furnace. With the opening and closing structure design of this invention, the uniform heating of the material boat in the sintering furnace will not be affected.

[0015] Furthermore, the support base located below the preheating chamber is equipped with a conveyor belt that runs through the bottom of the preheating chamber. The conveyor belt is equipped with two drive wheels and a ratchet. The drive wheel near the transfer chamber rotates coaxially with the ratchet, and the drive wheel near the discharge platform is rotatably connected to the inner wall of the support base. The inner wall of the support base is equipped with a toothed plate that meshes with the second gear. The toothed plate is slidably connected to the inner wall of the support base and meshes with the ratchet.

[0016] Explanation: By setting up a conveyor belt, when the telescopic rod extends and moves upward, the toothed plate and ratchet drive in one direction, so the conveyor belt remains stationary and unaffected, and the next material boat is preheated normally in the preheating chamber; when the telescopic rod retracts after sintering, the toothed plate drives the ratchet to rotate in the opposite direction, thereby driving the conveyor belt to transport the material boat, which plays the role of automated material boat transportation without the need for manual observation and pushing.

[0017] Furthermore, the carrier plate is equipped with a weight sensor, which controls the motor to perform the raising control of the telescopic rod through the controller.

[0018] Explanation: By setting a weight sensor to control the extension of the telescopic rod, the material boat can be placed on the carrier plate and then rise for sintering, which improves the working efficiency of the sintering furnace, facilitates manual observation and operation, and reduces the workload.

[0019] Furthermore, each of the vacuum insulation valves is equipped with a sensor for sensing the distance to the material boat, and the sensor controls the opening and closing of the vacuum insulation valve through a controller.

[0020] Explanation: By setting up sensors, the material boat can automatically enter the next compartment through the vacuum insulation valve when it flows in the sintering furnace, which further enhances the automation efficiency of the sintering furnace and reduces the amount of manual operation required for opening and closing.

[0021] Furthermore, the outer wall of the material boat is provided with a slot, and the transfer chamber is provided with a guide plate rotatably connected to the inner wall of the transfer chamber via a screw. The guide plate is provided with a locking block that engages with the slot.

[0022] The bottom side of the vacuum insulation valve penetrates through the outer wall of the transfer chamber and is slidably connected to the outer wall of the transfer chamber. The screw penetrates through the inner wall of the transfer chamber and is rotatably connected to the inner wall of the transfer chamber. The vacuum insulation valve located inside the side wall of the transfer chamber is provided with meshing teeth that mesh with the screw for transmission.

[0023] Explanation: Through the meshing and transmission between the screw and the vacuum insulation valve, when the vacuum insulation valve rises and opens, the screw drives the guide plate that is engaged with the material boat to rotate, thereby causing the material boat to move forward and automatically transfer the material boat to the carrier plate. This reduces the positional deviation caused by manual transfer and improves the working efficiency of the sintering furnace.

[0024] Furthermore, the discharge platform is equipped with an alarm sensor for alerting the discharge process.

[0025] Note: By setting up alarm sensors, staff can be promptly reminded to remove the sintered material boats, thus ensuring the continuous operation of the sintering furnace.

[0026] Furthermore, magnets with the same magnetic properties are provided on the left and right side walls of the material boat.

[0027] Explanation: By setting magnets with the same magnetic properties, mutual resistance can be generated between the two material boats, which strengthens the pushing force of the latter material boat on the former material boat. This creates a certain distance between adjacent material boats, preventing them from being too close together and affecting the closing of the vacuum insulation valve when pushing the transfer chamber. It also avoids the need for manual repositioning of the latter material boat.

[0028] As an optional embodiment of the present invention, the pushing tool is a first pneumatic rod, and a second pneumatic rod is provided at the discharge platform near the cooling zone. The second pneumatic rod is connected to the first pneumatic rod through a transmission rod.

[0029] An eccentric column is provided on the end face of the third gear, and a sliding rod is sleeved on the eccentric column. Limiting frames that restrict the vertical displacement of the sliding rod are provided on the upper and lower sides of the sliding rod. The limiting frames are fixedly connected to the inner wall of the transfer chamber, and a sliding groove is provided on the side of the lower limiting frame facing the telescopic rod. A push rod that is slidably connected to the sliding groove is provided on the side of the sliding rod facing the sliding groove. The length of the push rod is shorter than the distance from the telescopic rod to the sliding groove.

[0030] Explanation: By setting up a first pneumatic rod and a second pneumatic rod, the sintered material boat is squeezed by the second pneumatic rod when it is discharged. The gas pushed by the squeeze is then transmitted to the first pneumatic rod through the transmission rod, causing the first pneumatic rod to expand and push the next material boat on the feeding platform. This achieves an automatic continuous production effect, and the material is automatically fed according to the discharge status, reducing manual labor.

[0031] Furthermore, by setting a push rod to assist the first pneumatic rod, the material boat on the telescopic rod can be moved to the cooling zone in time when sintering is completed, reducing contact and collision between material boats and preventing accidents such as scraping when the telescopic rod rises because the previous material boat is too close to the next material boat on the carrier plate.

[0032] As another alternative to the present invention, the pushing tool is an electric push rod.

[0033] Explanation: By setting up an electric push rod, the electric push rod can push the next material boat on the feeding platform according to the set time program, thereby forming a continuous flow of material boats in the sintering furnace, and the setup is simple.

[0034] The beneficial effects of this invention are:

[0035] (1) The continuous directional solidification sintering furnace designed in this invention completes the heating, heat preservation and copper infiltration, and cooling processes in separate stations. It integrates vacuum, atmosphere protection and pressure sintering functions in the furnace, which can achieve multi-functional effects of zoned control and multiple process combinations. It also saves energy and reduces the repeated heating and cooling processes through continuous production. Furthermore, the addition of directional solidification design can reduce shrinkage cavities in the product and improve material utilization. Through continuous production, it can improve the production cycle and increase production efficiency. Attached Figure Description

[0036] Figure 1 This is an overall structural diagram of Embodiment 1 of the continuous directional solidification sintering furnace of the present invention;

[0037] Figure 2 This is an internal structural diagram of Embodiment 1 of the continuous directional solidification sintering furnace of the present invention;

[0038] Figure 3 This is a structural diagram of the air exchange tank of the continuous directional solidification sintering furnace of the present invention;

[0039] Figure 4 This is an internal structural diagram of Embodiment 2 of the continuous directional solidification sintering furnace of the present invention;

[0040] Figure 5 This is a gear distribution diagram of the continuous directional solidification sintering furnace of the present invention;

[0041] Figure 6 This is an opening and closing structure diagram of the continuous directional solidification sintering furnace of the present invention;

[0042] Figure 7 This is a structural diagram of the carrier plate of the continuous directional solidification sintering furnace of the present invention;

[0043] Figure 8 This is a structural diagram of the air exchange tank of the continuous directional solidification sintering furnace of the present invention;

[0044] Figure 9 This is an internal structural diagram of Embodiment 3 of the continuous directional solidification sintering furnace of the present invention;

[0045] Figure 10 This is a structural diagram of the material boat in Embodiment 4 of the continuous directional solidification sintering furnace of the present invention;

[0046] Figure 11 This is an overall structural diagram of Embodiment 4 of the continuous directional solidification sintering furnace of the present invention;

[0047] Figure 12 This is a pusher structure diagram of Embodiment 4 of the continuous directional solidification sintering furnace of the present invention;

[0048] Among them, 1-feeding platform, 11-vacuum insulation valve, 12-material boat, 121-slot, 122-magnet, 13-first pneumatic rod, 14-support base, 15-electric push rod, 2-preheating chamber, 21-conveyor belt, 22-conveyor wheel, 23-ratchet, 231-tooth plate, 3-transfer chamber, 31-cooling zone, 32-telescopic rod, 321-carrier plate, 322-second gear, 323-weight sensor, 324-motor, 33-third gear 331-Eccentric column, 332-Slide rod, 333-Limit frame, 334-Push rod, 34-Guide plate, 341-Screw, 342-Snap-fit ​​block, 4-Discharge platform, 41-Second pneumatic rod, 42-Transmission rod, 5-Sintering chamber, 51-Furnace chamber, 52-Feed inlet, 53-Gas exchange tank, 531-First gear, 532-Air outlet, 533-Air intake, 534-Gas exchange hole, 54-Splicing plate, 55-Traction rod, 56-Fourth gear. Detailed Implementation

[0049] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0050] Example 1

[0051] A continuous directional solidification sintering furnace, consisting of Figure 1 and Figure 2 As can be seen, the support base 14 includes, from left to right, a feeding platform 1, a preheating chamber 2, a transfer chamber 3, and a discharging platform 4, which are connected or separated by vacuum insulation valves 11. Each vacuum insulation valve 11 is equipped with a sensor for sensing the distance to the material boat 12. The sensor controls the opening and closing of the vacuum insulation valve 11 through a controller.

[0052] Depend on Figure 1 and Figure 2 It can be seen that a sintering chamber 5 is provided above the transfer chamber 3 and communicates with the transfer chamber 3. A cooling zone 31 is provided between the transfer chamber 3 and the vacuum insulation valve 11 located on the right side of the transfer chamber 3. A number of material boats 12 are provided on the support base 14 and flow sequentially in the feeding platform 1, preheating chamber 2, transfer chamber 3, sintering chamber 5, cooling zone 31 and discharge platform 4. An electric push rod 15 is provided on the support base 14 to drive the material boats 12 from the feeding platform 1 into the preheating chamber 2. The material boat 12 in contact with the electric push rod 15 drives the next material boat 12. A transmission chain is provided on the feeding platform 1 to assist the electric push rod 15 in driving the material boats 12. Tracks for sliding the material boats 12 are provided in the preheating chamber 2, transfer chamber 3 and cooling zone 31.

[0053] The sintering furnace is equipped with an automatic ignition and flame monitoring device, a flame arrestor, a furnace hydrogen pressure stabilizing and anti-backfire device, a furnace hydrogen pressure overpressure relief device, a hydrogen-oxygen analyzer, an explosion relief device with standard explosion-proof discs, and a safety interlock program control setting. The selection and installation positions of the above devices are set according to existing technology and are not shown in the diagram.

[0054] Depend on Figure 2 It can be seen that the sintering chamber 5 has a furnace chamber 51 at the top, and the bottom plate of the furnace chamber 51 has a feed inlet 52 at the center.

[0055] Depend on Figure 1 and Figure 2 It can be seen that the support base 14 located below the transfer chamber 3 is provided with a telescopic rod 32 for driving the material boat 12 into the sintering chamber 5. The top of the telescopic rod 32 passes through the bottom of the transfer chamber 3 and is slidably connected to the bottom of the transfer chamber 3. The top of the telescopic rod 32 is provided with a carrier plate 321 for supporting the material boat 12. The carrier plate 321 is slidably sealed with the feed port 52. The bottom of the telescopic rod 32 is connected to the drive motor.

[0056] The working principle of the above-mentioned continuous directional solidification sintering furnace is as follows: the first boat 12 loaded with sintering material is placed on the feeding platform 1, and the boat 12 is pushed towards the preheating chamber 2 by the electric push rod 15 and the chain drive on the feeding platform 1. The sensor on the vacuum insulation valve 11 on the left side of the preheating chamber 2 senses the approach of the boat 12, thereby opening the valve and allowing the vacuum insulation valve 11 to slide upward to expose the passage into the preheating chamber 2. The principle is similar to that of a sensor door. The boat 12 enters the preheating chamber 2, and after entering the preheating chamber 2, the preheating chamber 2 is opened to preheat the sintering material.

[0057] After preheating, the electric push rod 15 pushes the next material boat 12 on the feeding platform 1 toward the preheating chamber 2, so that the previous material boat 12 in the preheating chamber 2 enters the transfer chamber 3 under the push of the next material boat 12. After the vacuum insulation valve 11 located between the preheating chamber 2 and the transfer chamber 3 is opened, the material boat 12 is pushed onto the carrier plate 321. The motor automatically drives the telescopic rod 32 to rise until the carrier plate 321 contacts and seals with the feed port 52 for sintering.

[0058] After sintering is completed, the telescopic rod 32 automatically descends, and the sintered material in the material boat 12 undergoes directional solidification during the descent process;

[0059] After the first material boat 12 enters the transfer chamber 3, the electric pusher 15 pushes the second material boat 12 into the preheating chamber 2. When the first material boat 12 approaches the cooling zone 31, the second material boat 12 enters the transfer chamber 3, and the electric pusher 15 pushes the third material boat 12 into the preheating chamber 2. After the first material boat 12 enters the discharge platform 4, the second material boat 12 enters the cooling zone 31, the third material boat 12 enters the transfer chamber 3, and the fourth material boat 12 enters the preheating chamber 2. In this way, the heating, heat preservation and copper infiltration, and cooling processes are completed in separate stations, and the functions of vacuum, atmosphere protection, and pressure sintering are integrated into the furnace. This can achieve the multi-functional effect of zoned control and multiple process combinations. Moreover, the continuous production of multiple material boats 12 in the sintering furnace improves the production cycle and increases production efficiency.

[0060] Example 2

[0061] The difference between this embodiment and Embodiment 1 is that, by Figure 3 As shown, magnets 122 with the same magnetic properties are provided on the left and right side walls of the material boat 12;

[0062] Depend on Figure 4 As shown, the base plate is provided with an opening and closing structure for rotating and controlling the opening and closing of the feed inlet 52;

[0063] Depend on Figure 4 and Figure 8 As shown, a gas exchange tank 53 is provided on the inner wall of the sintering chamber 5 and is fixedly connected to the inner wall of the sintering chamber 5. A first gear 531 that drives the opening and closing structure to rotate is sleeved on the outer wall of the gas exchange tank 53. A plurality of air outlet holes 532 are provided on the lower side wall of the gas exchange tank 53, and a plurality of air intake holes 533 are provided on the upper side wall of the gas exchange tank 53. The first gear 531 is provided with a plurality of gas exchange holes 534 that correspond one-to-one with the air outlet holes 532 and the air intake holes 533.

[0064] Depend on Figure 6 As shown, the opening and closing structure includes multiple splicing plates 54 that are spliced ​​and closed together, a traction rod 55, and a fourth gear 56 that is rotatably sleeved on the base plate; one corner of the splicing plate 54 is rotatably connected to the side wall of the feed inlet 52; one end of the traction rod 55 is fixedly connected to the other corner of the splicing plate 54, and the other end of the traction rod 55 is rotatably connected to the inner wall of the fourth gear 56.

[0065] Depend on Figure 4 , Figure 5 and Figure 7 As shown, a second gear 322 is threaded onto the telescopic rod 32 located at the top of the support base 14. The second gear 322 meshes with the first gear 531 through a third gear 33. The third gear 33 passes through the inner wall of the transfer chamber 3 and is rotatably connected to the inner wall of the transfer chamber 3. A weight sensor 323 is provided on the carrier plate 321. The weight sensor 323 controls the motor to perform the upward control of the telescopic rod 32 through the controller.

[0066] The working principle of this embodiment differs from that of embodiment 1 in that the carrier plate 321 senses the placement of the material boat 12 and controls the telescopic rod 32 to rise. At the same time as the telescopic rod 32 rises, the second gear 322, which is threadedly connected to the telescopic rod 32, begins to rotate, thereby causing the third gear 33 to rotate. The third gear 33 drives the first gear 531 to rotate the fourth gear 56, thereby the fourth gear 56 pulls the traction rod 55 to rotate the splicing plate 54 away from the center of the feed inlet 52 and closer to the inner wall of the fourth gear 56, thereby gradually exposing the feed inlet 52, so that the carrier plate 321 slides and seals with the side wall of the feed inlet 52, and the material boat 12 is sintered in the furnace 51.

[0067] Furthermore, when the first gear 531 rotates, the air exchange hole 534 corresponds one-to-one with the air intake hole 533, thereby drawing oxygen from the sintering chamber 5.

[0068] The previous material boat 12 moves forward before the next material boat 12 comes into contact with each other due to the magnet 122.

[0069] Example 3

[0070] The difference between this embodiment and embodiment 2 is that, by Figure 9 As shown, the support base 14 located below the preheating chamber 2 is provided with a conveyor belt 21 that runs through the bottom of the preheating chamber 2. The conveyor belt 21 is provided with two drive wheels 211 and a ratchet 212. The drive wheel 211 near the transfer chamber 3 rotates coaxially with the ratchet 212, and the drive wheel 211 near the discharge platform 4 is rotatably connected to the inner wall of the support base 14.

[0071] Depend on Figure 9 As shown, the inner wall of the support base 14 is provided with a toothed plate 213 that meshes with the second gear 322 for transmission. The toothed plate 213 is slidably connected to the inner wall of the support base 14 and meshes with the ratchet 212 for transmission.

[0072] Depend on Figure 9 and Figure 10 As shown, the outer wall of the material boat 12 is provided with a slot 121, and the transfer chamber 3 is provided with a guide plate 34 rotatably connected to the inner wall of the transfer chamber 3 via a screw 341. The guide plate 34 is provided with a locking block 342 that engages with the slot 121.

[0073] Depend on Figure 9 As shown, the bottom side of the vacuum insulation valve 11 penetrates the outer wall of the transfer chamber 3 and is slidably connected to the outer wall of the transfer chamber 3. The screw 341 penetrates the inner wall of the transfer chamber 3 and is rotatably connected to the inner wall of the transfer chamber 3. The vacuum insulation valve 11 located in the side wall of the transfer chamber 3 is provided with meshing teeth that mesh with the screw 341 for transmission.

[0074] The working principle of this embodiment differs from that of embodiment 1 in that when the telescopic rod 32 rises, the second gear 322 causes the toothed plate 213 to move closer to the ratchet 212. Since the toothed plate 213 and the ratchet 212 engage in unidirectional transmission, the ratchet 212 does not rotate.

[0075] When the telescopic rod 32 descends, the toothed plate 213 meshes with the ratchet 212 in the opposite direction, causing the ratchet 212 to drive the right transmission wheel 211, which in turn drives the left transmission wheel 211 through the conveyor belt 21, thereby sending the material boat 12 in the preheating chamber 2 into the transfer chamber 3 along with the conveyor belt 21.

[0076] Simultaneously, the vacuum insulation valve 11 located between the preheating chamber 2 and the transfer chamber 3 opens upward to allow the material boat 12 to pass through. When the material boat 12 enters the transfer chamber 3, it engages with the locking block 342 on the guide plate 34 through the locking groove 121. The guide plate 34 rotates towards the carrier plate 321 due to the meshing transmission between the screw 341 and the vacuum insulation valve 11, thereby driving the material boat 12 forward to the position of the carrier plate 321. This realizes the process of the next material boat 12 automatically transferring from the preheating chamber 2 to the transfer chamber 3 after the previous material boat 12 has been sintered, which improves the continuous process of the sintering furnace and increases the degree of automation.

[0077] Example 4

[0078] The difference between this embodiment and embodiment 2 is that, by Figure 11 As shown, the pushing tool is a first pneumatic rod 13, and a second pneumatic rod 41 is provided at the discharge platform 4 near the cooling zone 31. The second pneumatic rod 41 is connected to the first pneumatic rod 13 through a transmission rod 42.

[0079] Depend on Figure 11 As shown, the discharge platform 4 is equipped with an alarm sensor for reminding the discharge of materials; the alarm sensor is a commercially available alarm sensor, which is adapted to this device for installation;

[0080] Depend on Figure 12 As shown, an eccentric column 331 is provided on the end face of the third gear 33, and a slide rod 332 is sleeved on the eccentric column 331. Limiting frames 333 that restrict the vertical displacement of the slide rod 332 are respectively provided on the upper and lower sides of the slide rod 332. The limiting frames 333 are fixedly connected to the inner wall of the transfer chamber 3, and the lower limiting frame 333 has a sliding groove on the side facing the telescopic rod 3. A push rod 334 that is slidably connected to the sliding groove is provided on the side of the slide rod 332 facing the sliding groove. The length of the push rod 334 is 2cm shorter than the distance from the telescopic rod 32 to the sliding groove.

[0081] The working principle of this embodiment differs from that of embodiment 2 in that when the previous material boat 12 enters the discharge platform 4, it squeezes the second pneumatic rod 41, thereby compressing the gas in the second pneumatic rod 41 and transmitting it to the first pneumatic rod 13 through the transmission rod 42, thereby filling and expanding the first pneumatic rod 13 with gas, and thus pushing the next material boat 12 on the feeding platform 1 into the preheating chamber 2.

[0082] When the boat 12 is pushed onto the carrier plate 321, the weight sensor 323 on the carrier plate 321 senses the weight of the boat 12 when it is completely placed on the carrier plate 321 and drives the telescopic rod 32 to rise. At this time, the slide rod 332 is located on the right side of the telescopic rod 32. As the telescopic rod 32 rises, the eccentric column 331 on the third gear 33 drives the slide rod 332 to move to the left, thereby driving the push rod 334 to move to the left until it reaches the leftmost end.

[0083] As the telescopic rod 32 descends, the third gear 33 drives the push rod 334 to move to the right and closer to the carrier plate 321, thereby pushing the material boat 12 on the carrier plate 321 to detach from the carrier plate 321 and move closer to the cooling zone 31. Since the length of the push rod 334 is shorter than the distance from the telescopic rod 32 to the chute, it will not collide with the telescopic rod 32. The push rod 334 is a certain distance from the bottom of the transfer chamber 3. When the carrier plate 321 is close to the bottom and low, the stroke is calculated to move the push rod 334 to the top of the carrier plate 321 and contact the material boat 12. At this time, the height is already very low. As the push rod 334 moves to the right and the carrier plate 321 moves down, the material boat 12 gradually detaches from the carrier plate 321.

[0084] This enables the automation of material loading and unloading in the material boat 12.

Claims

1. A continuous directional solidification sintering furnace, characterized in that, The system includes a support base (14), which, from left to right, includes a feeding platform (1), a preheating chamber (2), a transfer chamber (3), and a discharge platform (4), which are connected or separated by vacuum insulation valves (11). A sintering chamber (5) is located above the transfer chamber (3) and communicates with it. A cooling zone (31) is provided between the transfer chamber (3) and the vacuum insulation valve (11) located on the right side of the transfer chamber (3). The support base (14) is equipped with... There are multiple material boats (12) that flow sequentially in the feeding platform (1), preheating chamber (2), transfer chamber (3), sintering chamber (5), cooling zone (31) and discharge platform (4). The support base (14) is provided with a pushing tool for driving the material boats (12) from the feeding platform (1) into the preheating chamber (2). The material boat (12) in contact with the pushing tool drives the previous material boat (12). The feeding platform (1) is provided with a transmission chain for assisting the pushing tool in driving the material boats (12). The sintering chamber (5) has a furnace chamber (51) at the top, and a feed inlet (52) is located at the center of the bottom plate of the furnace chamber (51). The support base (14) located below the transfer chamber (3) is equipped with a telescopic rod (32) for driving the material boat (12) into the sintering chamber (5). The top of the telescopic rod (32) passes through the bottom of the transfer chamber (3) and is slidably connected to the bottom of the transfer chamber (3). The top of the telescopic rod (32) is equipped with a carrier plate (321) for carrying the material boat (12). The carrier plate (321) is slidably sealed with the feed inlet (52). The bottom of the telescopic rod (32) is connected to the drive motor. The left and right side walls of the material boat (12) are provided with magnets (122) of the same magnetic properties; the bottom plate is provided with an opening and closing structure for rotating and controlling the opening and closing of the feed inlet (52); A gas exchange tank (53) is fixedly connected to the inner wall of the sintering chamber (5). A first gear (531) that drives the opening and closing structure to rotate is sleeved on the outer wall of the gas exchange tank (53). A plurality of air outlet holes (532) are provided on the lower side wall of the gas exchange tank (53). A plurality of air intake holes (533) are provided on the upper side wall of the gas exchange tank (53). A plurality of gas exchange holes (534) corresponding one-to-one with the air outlet holes (532) and the air intake holes (533) are provided on the first gear (531). The opening and closing structure includes multiple splicing plates (54) that are spliced ​​and closed together, a traction rod (55), and a fourth gear (56) that is rotatably sleeved on the base plate; one corner of the splicing plate (54) is rotatably connected to the side wall of the feed inlet (52); one end of the traction rod (55) is fixedly connected to the other corner of the splicing plate (54), and the other end of the traction rod (55) is rotatably connected to the inner wall of the fourth gear (56); A second gear (322) is threaded onto the telescopic rod (32) located at the top of the support base (14). The second gear (322) meshes with the first gear (531) through a third gear (33). The third gear (33) passes through the inner wall of the transfer chamber (3) and is rotatably connected to the inner wall of the transfer chamber (3). The support base (14) located below the preheating chamber (2) is provided with a conveyor belt (21) that runs through the bottom of the preheating chamber (2). The conveyor belt (21) is provided with two drive wheels (211) and a ratchet (212). The drive wheel (211) near the transfer chamber (3) rotates coaxially with the ratchet (212). The drive wheel (211) near the discharge platform (4) is rotatably connected to the inner wall of the support base (14). The inner wall of the support base (14) is provided with a toothed plate (213) that meshes with the second gear (322). The toothed plate (213) is slidably connected to the inner wall of the support base (14) and meshes with the ratchet (212).

2. The continuous directional solidification sintering furnace according to claim 1, characterized in that, The pushing tool is an electric push rod (15).

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