WO2020108409A1 - Externally heated vacuum continuous sintering furnace - Google Patents

Externally heated vacuum continuous sintering furnace Download PDF

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Publication number
WO2020108409A1
WO2020108409A1 PCT/CN2019/120346 CN2019120346W WO2020108409A1 WO 2020108409 A1 WO2020108409 A1 WO 2020108409A1 CN 2019120346 W CN2019120346 W CN 2019120346W WO 2020108409 A1 WO2020108409 A1 WO 2020108409A1
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Prior art keywords
chamber
sintering
vacuum
furnace
transition chamber
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PCT/CN2019/120346
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French (fr)
Chinese (zh)
Inventor
董永安
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太原开元智能装备有限公司
宁波晋科自动化设备有限公司
江西开源自动化设备有限公司
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Publication of WO2020108409A1 publication Critical patent/WO2020108409A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • F27B9/042—Vacuum furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/38—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/38—Arrangements of devices for charging
    • F27B2009/384—Discharging

Definitions

  • the present application belongs to the technical field of sintering furnaces, and specifically relates to an externally-heated vacuum continuous sintering furnace.
  • the continuous sintering furnace of the current technology is multi-chamber thermal type, and some even more than ten chambers. Its advantages are: energy saving, high efficiency, and stable products; but because of its complicated structure, high failure rate, and high cost, these limits the use of continuous furnaces. In fact, more than 85% of the current market still uses single-chamber vacuum sintering furnace. The advantages of the single-chamber vacuum sintering furnace are the moderate price, and the disadvantages are: large energy consumption, complicated operation, and more people. Because of the internal heating type, the insulation material will absorb moisture in the air when the furnace door is opened, resulting in pollution of the furnace body.
  • the invention patent with patent application number 201210445514.9 discloses a continuous sintering equipment for rare earth permanent magnet alloy, which adopts a multi-chamber structure setting and completes heating and degassing, sintering and cooling treatments in different chambers.
  • the preparation box, glove box and tunnel conveying sealed box are bottom roller drives.
  • the multi-chamber continuous sintering furnace is expensive. Because each chamber requires a transmission mechanism, the overall structure is complicated, resulting in low reliability and high maintenance costs.
  • the present application provides an externally-heated vacuum continuous sintering furnace.
  • the sintering furnace adopts a single-chamber multi-temperature section structure, which can reduce energy consumption, and has a simple structure and high reliability.
  • An external thermal vacuum continuous sintering furnace includes a vacuum transition chamber, an external thermal sintering chamber and a cooling chamber which are sequentially connected.
  • the vacuum transition chamber and the cooling chamber are respectively provided with isolation valves at both ends, and the vacuum transition is performed through the isolation valve Separate spaces are formed in the chamber, the external thermal sintering chamber and the cooling chamber.
  • the vacuum transition chamber, external thermal sintering chamber and cooling chamber are all connected with a vacuum unit; the external thermal sintering chamber adopts a multi-stage heating structure.
  • the vacuum transition chamber is provided with a transition chamber conveying mechanism, the cooling chamber is provided with a cooling chamber conveying mechanism, and the material box in the externally-heated sintering chamber is transferred to the cooling chamber conveying mechanism through the transition chamber conveying mechanism.
  • the transition chamber conveying mechanism includes a transition chamber transmission belt and a movable push box oil cylinder.
  • the transition chamber transmission belt and the movable push box oil cylinder are both disposed in the vacuum transition chamber.
  • the transition chamber conveyor belt is a removable conveyor belt.
  • the transition chamber is provided with a driving oil cylinder connected to the pushing box oil cylinder.
  • the driving oil cylinder drives the pushing box oil cylinder to move.
  • the cooling chamber conveying mechanism includes a furnace oil cylinder and a furnace truck, the furnace vehicle is connected with the furnace oil cylinder, and the furnace vehicle is driven to move through the furnace oil cylinder.
  • It also includes a glove box, which is provided at one end of the vacuum transition chamber and is blocked by an isolation valve at one end of the vacuum transition chamber, and a storage box for the material box and a conveyor belt are provided in the glove box.
  • a sealed door is provided on the top of the material box storage bin, and a lifting platform is provided inside.
  • a magnetic field forming press is connected to the glove box.
  • a dry isostatic press and/or a cutting machine are provided between the magnetic field forming press and the glove box.
  • the external heating type sintering chamber is provided with a vacuum exhaust hole at the inlet port at one end, and a gas regulating valve at the outlet port at the other end.
  • the diameter of the furnace of the externally-heated sintering chamber is 400-500 mm.
  • the sintering chamber adopts an external heat multi-stage structure, that is, the electric heating wire is arranged outside the sintering chamber, and the heating wire is outside the heat insulation layer.
  • the external heating can be segmented, and up to 20 temperature zones can be used as required. Each temperature zone is independently controlled to ensure the sintering effect.
  • the sintering chamber has the same advantages as the internal heat multi-chamber vacuum sintering furnace, and overcomes the shortcomings of the internal heat multi-chamber vacuum sintering furnace with a complicated structure and high cost.
  • This application can be applied to the shaping and sintering of neodymium iron boron, samarium cobalt, and magnetic materials.
  • External heat continuous furnaces can also be used for various aging treatments, and can be used in other fields such as ceramics and powder metallurgy. It can also be combined with multiple magnetic field forming presses, dry isostatic pressing or cutting machines to form a complete production line.
  • Figure 1 is a front view of an embodiment of the present application
  • FIG. 2 is a top view of an embodiment of the present application
  • FIG. 3 is a front view of another embodiment of the present application.
  • FIG. 5 is a side view of another embodiment of the present application.
  • 1 is the vacuum transition chamber
  • 111 is the transition chamber conveyor belt
  • 112 is the push box oil cylinder
  • 113 is the driving cylinder
  • 2 is the external thermal sintering chamber
  • 21 is the insulation layer
  • 22 is the sintering support
  • 3 is the cooling chamber
  • 311 is the delivery cylinder
  • 312 is the delivery truck
  • 4 is the glove box
  • 41 is the magazine storage bin
  • 42 is the conveyor belt
  • 43 is the sealed door
  • 44 is the lifting table
  • 5 is the magnetic field forming press
  • 6 is the dry isostatic Press
  • 7 is a cutting machine
  • 8 is a vacuum unit
  • 9 is a vacuum exhaust hole
  • 10 is a gas regulating valve
  • 11 is a transition chamber isolation valve
  • 12 is a furnace isolation valve
  • 13 is a furnace isolation valve
  • 14 is a discharge Isolation valve
  • 15 is the material box.
  • an externally-heated vacuum continuous sintering furnace includes a vacuum transition chamber 1, an externally-heated sintering chamber 2 and a cooling chamber 3 which are sequentially connected, and the two ends of the vacuum transition chamber 1 and the cooling chamber 3 are respectively An isolation valve is provided, and the vacuum transition chamber 1, the external thermal sintering chamber 2 and the cooling chamber 3 are respectively formed into independent spaces through the isolation valve.
  • the isolation valve includes a transition chamber isolation valve 11, a furnace inlet isolation valve 12, a furnace outlet isolation valve 13 and a material discharge isolation valve 14, all of which can use plug-in valves.
  • the transition chamber isolation valve 11 is located at one end of the vacuum transition chamber 1;
  • the furnace inlet isolation valve 12 is located at the other end of the vacuum transition chamber 1, that is, at the junction of the external thermal sintering chamber 2 and the vacuum transition chamber 1.
  • the furnace isolation valve 12 isolates the vacuum transition chamber 1 from the external thermal sintering chamber 2.
  • the furnace isolation valve 13 is located at one end of the cooling chamber 3, that is, at the junction of the external thermal sintering chamber 2 and the cooling chamber 3.
  • the furnace isolation valve 13 isolates the thermal sintering chamber from the cooling chamber 3;
  • the discharge isolation valve 14 is located The other end of the cooling chamber 3.
  • the vacuum transition chamber 1, the external thermal sintering chamber 2 and the cooling chamber 3 are all connected with a vacuum unit 8. Three vacuum units 8 are provided.
  • the cooling chamber 3 is connected to a heat exchanger and a fan.
  • the vacuum transition chamber 1 is provided with a transition chamber conveying mechanism
  • the cooling chamber 3 is provided with a cooling chamber conveying mechanism
  • the material box 15 in the externally-heated sintering chamber 2 is transferred to the cooling chamber conveying mechanism through the transition chamber conveying mechanism.
  • a sintering bracket 22 is provided in the external-heating sintering chamber 2, and the material box 15 can slide on the sintering bracket 22.
  • the working process is as follows: open the transition chamber isolation valve 11, send the box 15 filled with workpieces into the vacuum transition chamber 1, and then close the transition chamber isolation valve 11; start the vacuum unit 8, open the furnace isolation valve 12, the furnace isolation valve 13. Feed the material box 15 into the external thermal sintering chamber 2 through the transition chamber conveying mechanism, and push all the material boxes 15 in the external thermal sintering chamber 2 to move, so that the sintered completed material box 15 can be pushed to the cooling chamber 3 on the cooling chamber conveyor mechanism.
  • the furnace isolation valve 12 and the furnace isolation valve 13 are closed, and the cooling chamber 3 is filled with argon gas to a gauge pressure of zero.
  • the circulation fan is started, and the heat is discharged through the heat exchanger.
  • the discharge isolation valve 14 is opened, and the cooled work piece is taken out using a transportation mechanism such as a forklift installed outside the continuous sintering furnace.
  • a transportation mechanism such as a forklift installed outside the continuous sintering furnace.
  • the external thermal sintering chamber 2 adopts a multi-stage heating structure.
  • the external thermal sintering chamber 2 has no partition in the middle, and is a single-chamber structure, similar to a tunnel kiln. twenty one.
  • the external heating is divided into at least three stages, which are heated in turn from the feed inlet, and can be divided into a low temperature zone, a medium temperature zone, and a high temperature zone. For higher efficiency, 900-degree and 500-degree aging are not included in this system. The aging can be done in a single-chamber furnace outside.
  • Low temperature zone volatilization of gas, mold release agent and lubricant used for dehydrogenation.
  • Medium temperature zone Residual hydrogen in the process of dehydrogenation and crushing, to avoid liquid phase sintering on the outside, so that it cannot be discharged.
  • specific temperature zones can be designed according to specific products, and up to 10 temperature zones can be set. It can be carried out at the rhythm of one tray per hour.
  • the main function of the transition chamber conveying mechanism is to feed the material box 15 in the transition chamber into the external thermal sintering chamber 2 and to eject the material box 15 in the external thermal sintering chamber 2. Therefore, the specific structure of the transition chamber transport mechanism can be adjusted and designed according to the actual situation. Preferably used: including the transition chamber conveyor belt 111 and the movable push box oil cylinder 112.
  • the material box 15 When feeding, the material box 15 is placed on the transition chamber conveyor belt 111, the conveyor belt is started, and the material box 15 is transferred to the entrance of the externally heated sintering chamber 2; then the material box cylinder 112 is moved to a position relative to the material box 15 The piston rod of the pushing box oil cylinder 112 is extended to push the box 15 into the externally-heated sintering chamber 2 and is transmitted through the box 15 so that all the boxes 15 in the sintering chamber move.
  • the push box oil cylinder 112 adopts a movable structure in order to avoid hindering the placement and movement of the materials on the conveyor belt 111 of the transition chamber. Therefore, it can adopt a variety of structures to achieve movement, for example, a driving cylinder 113 coupled with the push box cylinder 112 is provided in the transition chamber, and the push box cylinder 112 is driven to move through the driving cylinder 113.
  • the cylinder body of the driving cylinder 113 is fixed, and the piston rod of the driving cylinder 113 is connected to the push box cylinder 112;
  • the driving cylinder 113 may be provided with two, and may be set vertically or horizontally, and when the setting is vertical, the push box cylinder 112 may be realized
  • the up and down movement of the can realize the forward and backward movement of the pushing box cylinder 112 when it is horizontally set.
  • the main function of the cooling chamber conveying mechanism is to transfer the material ejected from the externally-heated sintering chamber 2 to the cooling chamber 3, which specifically includes a furnace oil cylinder 311 and a furnace truck 312, which are connected to the piston rod of the furnace oil cylinder 311.
  • the cylinder body of the tapping cylinder 311 is fixed, and the tapping truck 312 is driven to move by the tapping cylinder 311.
  • the baked truck 312 may adopt a forklift-type structure.
  • the discharge isolation valve 13 opens, and the discharge oil cylinder 311 contracts, so that the discharge truck 312 extends into the sintering chamber a certain distance, close to the sintering bracket 22, and its forklift arm height is equal to the sintering bracket 22.
  • the delivery cylinder 311 is extended, and the delivery vehicle is moved to the cooling chamber 3 for cooling.
  • the transition chamber conveyor belt 111 is a movable conveyor belt, that is, it can be connected with a power mechanism such as an oil cylinder, and the overall movement can be achieved through the power mechanism.
  • a power mechanism such as an oil cylinder
  • the cylinder body of the oil cylinder is fixed, and the piston rod is connected to the frame of the conveyor belt (with rollers), and its movement is achieved through the expansion and contraction of the oil cylinder; of course, the power mechanism mechanism can also be equipped with electric rollers on its frame
  • the realization of the structure can be adjusted and designed according to the actual situation.
  • the transition chamber conveyor belt 111 and the feed box 15 on it can be driven to move through the power mechanism (elongation of the oil cylinder), so that the transition chamber conveyor belt 111 is docked with the sintering bracket 22, which can be reduced with the sintering bracket 22 The interval between them can improve the continuous stability of the feeding box 15 at the time.
  • the glove box 4 also includes a glove box 4 (preparation chamber).
  • the glove box 4 is provided at one end of the vacuum transition chamber 1 and is blocked by an isolation valve (transition chamber isolation valve 11) at one end of the vacuum transition chamber 1.
  • the glove box 4 is provided with a material box for storage A silo 41 and a conveyor belt 42 that transfer the sinter box assembly to the transition chamber conveyor belt 111.
  • a sealed door 43 is provided at the top of the magazine storage bin 41, and a lifting table 44 is provided inside.
  • An empty magazine 15 is placed on the elevator table 44; by opening the sealed door 43, the elevator table 44 is raised and the worker takes the empty magazine 15. The lifting table 44 then descends, closing the sealed door.
  • the worker can operate in the glove box 4: place the workpiece in the magazine 15 and after placing, the magazine 15 can be directly placed on the conveyor belt 42.
  • the transition chamber isolation valve 11 is opened, the transition chamber conveyor belt 111 moves (the cylinder shrinks) to the transition chamber conveyor belt 42 to dock, and the conveyor belt 42 is activated to transfer the magazine 15 to the transition chamber conveyor belt 111.
  • the glove box 4 is connected with a magnetic field forming press 5, and a dry isostatic press 6 and/or a cutting machine 7 are provided between the magnetic field forming press 5 and the glove box 4.
  • the magnetic field forming press 5, the dry isostatic press 6, the cutting machine 7, and the glove box 4 can be arranged in sequence, and the specific connection setting can be adjusted and designed by those skilled in the art according to the actual situation. Through the above settings, a complete production line can be formed.
  • the magnetic field forming press 5, the dry isostatic press 6 and the cutting machine 7 may use the equipment in the prior art, preferably the dry isostatic press structure disclosed in the patent application number 201610448905.4; the patent application number is preferably used 201810850418.x discloses the structure of the cutting machine.
  • the cutting unit can be removed ;
  • the dry isostatic pressure unit can be removed.
  • the production process is as follows: docking the NdFeB magnetic powder barrel and the press, passing through the weighing machine and distributor, preforming in the magnetic field press, and the automatic gripping mechanism will send it to the dry isostatic pressing station, etc. After static pressure, it is sent to the cutting cabin for cutting, manually placed in the sintering box 15 in the glove box 4, and the box 15 is stacked on the conveyor belt 42. When the material of one tray is prepared, the transition chamber isolation valve 11 is opened for transfer.
  • the magnet is completed in a closed system, which can well control the oxygen content.
  • There is no isostatic pressing in the traditional production process peeling the plastic film with oil, and entering and leaving the sealed cabin many times, causing oxidation and product instability. Also save a lot of inert gas, plastic packaging and a lot of labor.
  • magnetic field molding, isostatic pressing, and sintering form a sealed production line, which saves 80% of labor.
  • the externally-heated sintering chamber 2 is provided with a vacuum exhaust hole 9 at the end of the feed port, which can reduce the pollution of the volatiles to the products in the high temperature area, away from the high temperature section; the other end of the discharge port (near the cooling chamber 3)
  • a gas regulating valve 10 is provided to control the flow of inert gas, such as argon.
  • the flow rate is controlled at 0.1mL-100mL/min.
  • the vacuum degree is controlled at 0.1Pa-100Pa.
  • the diameter of the furnace of the externally-heated sintering chamber 2 is preferably 400-500 mm.
  • the stacking section of the sintering box 15 is less than 300X300, so that the temperature uniformity will be much faster during the sintering process of the product, and the sintering time will be shortened.

Abstract

An externally heated vacuum continuous sintering furnace, comprising a vacuum transition chamber (1), an externally heated sintering chamber (2) and a cooling chamber (3) which sequentially communicate with one another, wherein isolation valves are respectively arranged at two ends of the vacuum transition chamber (1) and two ends of the cooling chamber (3); the vacuum transition chamber (1), the externally heated sintering chamber (2) and the cooling chamber (3) respectively form independent spaces by means of the isolation valves; and the vacuum transition chamber (1), the externally heated sintering chamber (2) and the cooling chamber (3) communicate with vacuum units (8). A multi-stage heating structure is employed in the externally heated sintering chamber (2), a transition chamber conveying mechanism is provided in the vacuum transition chamber (1), a cooling chamber conveying mechanism is provided in the cooling chamber (3), and a material box in the externally heated sintering chamber (2) is transferred to the cooling chamber conveying mechanism by means of the transition chamber conveying mechanism. The present invention inherits all of the advantages of an internally heated multi-chamber vacuum sintering furnace and overcomes the defects of complex structure and high cost. By means of the ingenious connection to a magnetic field press and dry isostatic pressing, the furnace may be changed so as to operated in a sealed system, and the oxygen content may be well controlled.

Description

一种外热式真空连续烧结炉External heat type vacuum continuous sintering furnace
本申请要求于2018年11月26日提交中国专利局、申请号为201811413657.5、发明名称为“一种外热式真空连续烧结炉”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application requires the priority of the Chinese patent application filed on November 26, 2018 in the Chinese Patent Office with the application number 201811413657.5 and the invention titled "an externally heated vacuum continuous sintering furnace", the entire contents of which are incorporated by reference in this document Applying.
技术领域Technical field
本申请属于烧结炉技术领域，具体涉及一种外热式真空连续烧结炉。The present application belongs to the technical field of sintering furnaces, and specifically relates to an externally-heated vacuum continuous sintering furnace.
背景技术Background technique
当前技术的连续烧结炉都是多室内热式的，有的甚至多达十室以上。其优点为：节能、效率高、产品稳定；但因其结构复杂、故障率高、成本高，这些都限制了连续炉的使用。事实上目前市场上85％以上还是使用的单室真空烧结炉。单室真空烧结炉的优点是价格适中，缺点是：能耗大，操作复杂，用人较多。因为采用内热式的，保温材料在打开炉门时会吸收空气中的水分，导致污染炉体。The continuous sintering furnace of the current technology is multi-chamber thermal type, and some even more than ten chambers. Its advantages are: energy saving, high efficiency, and stable products; but because of its complicated structure, high failure rate, and high cost, these limits the use of continuous furnaces. In fact, more than 85% of the current market still uses single-chamber vacuum sintering furnace. The advantages of the single-chamber vacuum sintering furnace are the moderate price, and the disadvantages are: large energy consumption, complicated operation, and more people. Because of the internal heating type, the insulation material will absorb moisture in the air when the furnace door is opened, resulting in pollution of the furnace body.
专利申请号为201210445514.9的发明专利公开了一种稀土永磁合金连续烧结设备，其采用多室结构设置，在不同的室完成加热脱气、烧结和冷却处理。准备箱、手套箱和隧道式传送密封箱是底辊传动。该多室连续烧结炉价格昂贵，由于每个室内均需要传送机构，使得整体结构复杂，导致可靠性低和维护成本较高。The invention patent with patent application number 201210445514.9 discloses a continuous sintering equipment for rare earth permanent magnet alloy, which adopts a multi-chamber structure setting and completes heating and degassing, sintering and cooling treatments in different chambers. The preparation box, glove box and tunnel conveying sealed box are bottom roller drives. The multi-chamber continuous sintering furnace is expensive. Because each chamber requires a transmission mechanism, the overall structure is complicated, resulting in low reliability and high maintenance costs.
发明内容Summary of the invention
针对上述技术问题，本申请提供了一种外热式真空连续烧结炉，该烧结炉 采用单室多温段结构，可以降低能耗，且结构简单，可靠性高。In view of the above technical problems, the present application provides an externally-heated vacuum continuous sintering furnace. The sintering furnace adopts a single-chamber multi-temperature section structure, which can reduce energy consumption, and has a simple structure and high reliability.
为了解决上述技术问题，本申请采用的技术方案为：In order to solve the above technical problems, the technical solutions adopted in this application are:
一种外热式真空连续烧结炉，包括依次联通的真空过渡室、外热式烧结室和冷却室，所述真空过渡室和冷却室的两端分别设有隔离阀，通过隔离阀使真空过渡室、外热式烧结室和冷却室分别形成独立的空间，所述真空过渡室、外热式烧结室和冷却室均联通有真空机组；所述外热式烧结室采用多段式加热结构，所述真空过渡室内设有过渡室输送机构，所述冷却室内设有冷却室输送机构，外热式烧结室内的料盒通过过渡室输送机构转移至冷却室输送机构。An external thermal vacuum continuous sintering furnace includes a vacuum transition chamber, an external thermal sintering chamber and a cooling chamber which are sequentially connected. The vacuum transition chamber and the cooling chamber are respectively provided with isolation valves at both ends, and the vacuum transition is performed through the isolation valve Separate spaces are formed in the chamber, the external thermal sintering chamber and the cooling chamber. The vacuum transition chamber, external thermal sintering chamber and cooling chamber are all connected with a vacuum unit; the external thermal sintering chamber adopts a multi-stage heating structure. The vacuum transition chamber is provided with a transition chamber conveying mechanism, the cooling chamber is provided with a cooling chamber conveying mechanism, and the material box in the externally-heated sintering chamber is transferred to the cooling chamber conveying mechanism through the transition chamber conveying mechanism.
所述过渡室输送机构包括过渡室传输带和可移动的推料盒油缸，过渡室传输带和可移动的推料盒油缸均设置在真空过渡室内。The transition chamber conveying mechanism includes a transition chamber transmission belt and a movable push box oil cylinder. The transition chamber transmission belt and the movable push box oil cylinder are both disposed in the vacuum transition chamber.
所述过渡室传输带为可移式传输带。The transition chamber conveyor belt is a removable conveyor belt.
所述过渡室设有与推料盒油缸联接的驱动油缸，通过驱动油缸带动推料盒油缸移动。The transition chamber is provided with a driving oil cylinder connected to the pushing box oil cylinder. The driving oil cylinder drives the pushing box oil cylinder to move.
所述冷却室输送机构包括出炉油缸和出炉车，所述出炉车与出炉油缸联接，通过出炉油缸驱动出炉车移动。The cooling chamber conveying mechanism includes a furnace oil cylinder and a furnace truck, the furnace vehicle is connected with the furnace oil cylinder, and the furnace vehicle is driven to move through the furnace oil cylinder.
还包括手套箱，所述手套箱设置在真空过渡室的一端，并通过真空过渡室一端的隔离阀阻隔，所述手套箱内的设有料盒存放仓和传输带。It also includes a glove box, which is provided at one end of the vacuum transition chamber and is blocked by an isolation valve at one end of the vacuum transition chamber, and a storage box for the material box and a conveyor belt are provided in the glove box.
所述料盒存放仓顶部设有密封门，其内部设有升降台。A sealed door is provided on the top of the material box storage bin, and a lifting platform is provided inside.
所述手套箱联接有磁场成型压机。A magnetic field forming press is connected to the glove box.
所述磁场成型压机与手套箱之间设有干式等静压机和/或切割机。A dry isostatic press and/or a cutting machine are provided between the magnetic field forming press and the glove box.
所述外热式烧结室一端进料口处设有真空排气孔，其另一端出料口处设有气体调节阀。The external heating type sintering chamber is provided with a vacuum exhaust hole at the inlet port at one end, and a gas regulating valve at the outlet port at the other end.
所述外热式烧结室的炉膛直径为400-500mm。The diameter of the furnace of the externally-heated sintering chamber is 400-500 mm.
本申请与现有技术相比，具有的有益效果是：Compared with the prior art, this application has the following beneficial effects:
烧结室内没有隔断，且烧结室内没有输送机构，这样极大程度上降低了整体的复杂性，降低了成本。同时，烧结室采用外热多段式结构，即电加热丝设置在烧结室的外面，加热丝外面是保温层。外加热可分段，根据需要可多达20个温区，每个温区独立控制，保证烧结效果。There is no partition in the sintering chamber, and there is no conveying mechanism in the sintering chamber, which greatly reduces the overall complexity and costs. At the same time, the sintering chamber adopts an external heat multi-stage structure, that is, the electric heating wire is arranged outside the sintering chamber, and the heating wire is outside the heat insulation layer. The external heating can be segmented, and up to 20 temperature zones can be used as required. Each temperature zone is independently controlled to ensure the sintering effect.
该烧结室具有与内热多室真空烧结炉相同的优点，又克服了内热多室真空烧结炉结构复杂、成本高的缺点。本申请可以应用到钕铁硼、钐钴、磁性材料的成型与烧结。外热式连续炉也可以用于各种时效处理，有可以用于陶瓷、粉末冶金等其他领域。其也可以与多台磁场成型压机、干式等静压或和切割机组合构成一个完整的生产线。The sintering chamber has the same advantages as the internal heat multi-chamber vacuum sintering furnace, and overcomes the shortcomings of the internal heat multi-chamber vacuum sintering furnace with a complicated structure and high cost. This application can be applied to the shaping and sintering of neodymium iron boron, samarium cobalt, and magnetic materials. External heat continuous furnaces can also be used for various aging treatments, and can be used in other fields such as ceramics and powder metallurgy. It can also be combined with multiple magnetic field forming presses, dry isostatic pressing or cutting machines to form a complete production line.
附图说明BRIEF DESCRIPTION
图1是本申请一个实施例的主视图；Figure 1 is a front view of an embodiment of the present application;
图2是本申请一个实施例的俯视图；2 is a top view of an embodiment of the present application;
图3是本申请另一个实施例的主视图；3 is a front view of another embodiment of the present application;
图4是本申请另一个实施例的俯视图；4 is a top view of another embodiment of the present application;
图5是本申请另一个实施例的侧视图；5 is a side view of another embodiment of the present application;
其中：1为真空过渡室，111为过渡室传输带，112为推料盒油缸，113为驱动油缸，2为外热式烧结室，21为保温层，22为烧结支架，3为冷却室，311为出炉油缸，312为出炉车，4为手套箱，41为料盒存放仓，42为传输带，43为密封门，44为升降台，5为磁场成型压机，6为干式等静压机，7为切割机，8为真空机组，9为真空排气孔，10为气体调节阀，11为过渡室隔离阀，12为 进炉隔离阀，13为出炉隔离阀，14为出料隔离阀，15为料盒。Among them: 1 is the vacuum transition chamber, 111 is the transition chamber conveyor belt, 112 is the push box oil cylinder, 113 is the driving cylinder, 2 is the external thermal sintering chamber, 21 is the insulation layer, 22 is the sintering support, 3 is the cooling chamber, 311 is the delivery cylinder, 312 is the delivery truck, 4 is the glove box, 41 is the magazine storage bin, 42 is the conveyor belt, 43 is the sealed door, 44 is the lifting table, 5 is the magnetic field forming press, 6 is the dry isostatic Press, 7 is a cutting machine, 8 is a vacuum unit, 9 is a vacuum exhaust hole, 10 is a gas regulating valve, 11 is a transition chamber isolation valve, 12 is a furnace isolation valve, 13 is a furnace isolation valve, 14 is a discharge Isolation valve, 15 is the material box.
具体实施方式detailed description
下面对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The following clearly and completely describes the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.
如图1和2所示，一种外热式真空连续烧结炉，包括依次联通的真空过渡室1、外热式烧结室2和冷却室3，真空过渡室1和冷却室3的两端分别设有隔离阀，通过隔离阀使真空过渡室1、外热式烧结室2和冷却室3分别形成独立的空间。As shown in FIGS. 1 and 2, an externally-heated vacuum continuous sintering furnace includes a vacuum transition chamber 1, an externally-heated sintering chamber 2 and a cooling chamber 3 which are sequentially connected, and the two ends of the vacuum transition chamber 1 and the cooling chamber 3 are respectively An isolation valve is provided, and the vacuum transition chamber 1, the external thermal sintering chamber 2 and the cooling chamber 3 are respectively formed into independent spaces through the isolation valve.
隔离阀包括过渡室隔离阀11、进炉隔离阀12、出炉隔离阀13和出料隔离阀14，上述隔离阀均可采用插板阀。具体的：过渡室隔离阀11位于真空过渡室1的一端；进炉隔离阀12位于真空过渡室1的另一端，即位于外热式烧结室2与真空过渡室1的联通处，通过该进炉隔离阀12将真空过渡室1于外热式烧结室2隔离。出炉隔离阀13位于冷却室3的一端，即位于外热式烧结室2与冷却室3的联通处，通过该出炉隔离阀13将热式烧结室与冷却室3隔离；出料隔离阀14位于冷却室3的另一端。The isolation valve includes a transition chamber isolation valve 11, a furnace inlet isolation valve 12, a furnace outlet isolation valve 13 and a material discharge isolation valve 14, all of which can use plug-in valves. Specifically: the transition chamber isolation valve 11 is located at one end of the vacuum transition chamber 1; the furnace inlet isolation valve 12 is located at the other end of the vacuum transition chamber 1, that is, at the junction of the external thermal sintering chamber 2 and the vacuum transition chamber 1. The furnace isolation valve 12 isolates the vacuum transition chamber 1 from the external thermal sintering chamber 2. The furnace isolation valve 13 is located at one end of the cooling chamber 3, that is, at the junction of the external thermal sintering chamber 2 and the cooling chamber 3. The furnace isolation valve 13 isolates the thermal sintering chamber from the cooling chamber 3; the discharge isolation valve 14 is located The other end of the cooling chamber 3.
真空过渡室1、外热式烧结室2和冷却室3均联通有真空机组8。真空机组8设有三个。冷却室3连接有热交换器和风机。真空过渡室1内设有过渡室输送机构，冷却室3内设有冷却室输送机构，外热式烧结室2内的料盒15通过过渡室输送机构转移至冷却室输送机构上。外热式烧结室2内设有烧结支架22，料盒15可在烧结支架22上滑动。The vacuum transition chamber 1, the external thermal sintering chamber 2 and the cooling chamber 3 are all connected with a vacuum unit 8. Three vacuum units 8 are provided. The cooling chamber 3 is connected to a heat exchanger and a fan. The vacuum transition chamber 1 is provided with a transition chamber conveying mechanism, the cooling chamber 3 is provided with a cooling chamber conveying mechanism, and the material box 15 in the externally-heated sintering chamber 2 is transferred to the cooling chamber conveying mechanism through the transition chamber conveying mechanism. A sintering bracket 22 is provided in the external-heating sintering chamber 2, and the material box 15 can slide on the sintering bracket 22.
工作过程如下：开启过渡室隔离阀11，将装满工件的料盒15送入真空过渡室1内，然后关闭过渡室隔离阀11；启动真空机组8、开启进炉隔离阀12、出炉隔离阀13，通过过渡室输送机构将料盒15送入外热式烧结室2内，并推动外热式烧结室2内的所有料盒15移动，即可将烧结完成的料盒15顶至冷却室3内的冷却室输送机构上。The working process is as follows: open the transition chamber isolation valve 11, send the box 15 filled with workpieces into the vacuum transition chamber 1, and then close the transition chamber isolation valve 11; start the vacuum unit 8, open the furnace isolation valve 12, the furnace isolation valve 13. Feed the material box 15 into the external thermal sintering chamber 2 through the transition chamber conveying mechanism, and push all the material boxes 15 in the external thermal sintering chamber 2 to move, so that the sintered completed material box 15 can be pushed to the cooling chamber 3 on the cooling chamber conveyor mechanism.
最后，关闭进炉隔离阀12和出炉隔离阀13，冷却室3内充氩气至表压为0。启动循环风机，热量通过热交换器排出。Finally, the furnace isolation valve 12 and the furnace isolation valve 13 are closed, and the cooling chamber 3 is filled with argon gas to a gauge pressure of zero. The circulation fan is started, and the heat is discharged through the heat exchanger.
待工件冷却后，开启出料隔离阀14，利用设置在连续烧结炉外的叉车等运输机构，将冷却后的工件取出。开启真空机组8，将冷却室3抽真空，等待下一次出炉。After the work piece is cooled, the discharge isolation valve 14 is opened, and the cooled work piece is taken out using a transportation mechanism such as a forklift installed outside the continuous sintering furnace. Turn on the vacuum unit 8, evacuate the cooling chamber 3, and wait for the next release.
外热式烧结室2采用多段式加热结构，外热式烧结室2中间没有隔断，为单室结构，类似于隧道窑；外热式烧结室2的外表面依次设有电加热丝和保温层21。外加热分为至少三段，从进料口依次升温，可分为低温区、中温区、高温区。为了更高的效率，将900度和500度时效没有纳入本***。时效可在外面的单室炉完成。The external thermal sintering chamber 2 adopts a multi-stage heating structure. The external thermal sintering chamber 2 has no partition in the middle, and is a single-chamber structure, similar to a tunnel kiln. twenty one. The external heating is divided into at least three stages, which are heated in turn from the feed inlet, and can be divided into a low temperature zone, a medium temperature zone, and a high temperature zone. For higher efficiency, 900-degree and 500-degree aging are not included in this system. The aging can be done in a single-chamber furnace outside.
低温区：用于脱氢吸附的气体、脱模剂、润滑剂的挥发。Low temperature zone: volatilization of gas, mold release agent and lubricant used for dehydrogenation.
中温区：脱氢氢碎过程的残氢，避免在外部已经液相烧结，使其排不出来。Medium temperature zone: Residual hydrogen in the process of dehydrogenation and crushing, to avoid liquid phase sintering on the outside, so that it cannot be discharged.
高温区：液相烧结及扩散。High temperature area: liquid phase sintering and diffusion.
当然，可根据具体的产品设计具体的温区，最多可设置10个温区。可以按每小时进一托盘的节奏进行。Of course, specific temperature zones can be designed according to specific products, and up to 10 temperature zones can be set. It can be carried out at the rhythm of one tray per hour.
过渡室输送机构的主要作用是将过渡室内的料盒15送入外热式烧结室2内，以及将外热式烧结室2内的料盒15顶出。因此，过渡室输送机构的具体结 构可以根据实际情况进行调整和设计。优选采用：包括过渡室传输带111和可移动的推料盒油缸112。送料时，将料盒15放置在过渡室传输带111上，启动该传输带，将料盒15转移至外热式烧结室2进口处；然后推料盒油缸112移动至与料盒15相对位置，推料盒油缸112的活塞杆伸出将料盒15顶入外热式烧结室2内，并通过该料盒15传递，使得烧结室内的所有料盒15移动。The main function of the transition chamber conveying mechanism is to feed the material box 15 in the transition chamber into the external thermal sintering chamber 2 and to eject the material box 15 in the external thermal sintering chamber 2. Therefore, the specific structure of the transition chamber transport mechanism can be adjusted and designed according to the actual situation. Preferably used: including the transition chamber conveyor belt 111 and the movable push box oil cylinder 112. When feeding, the material box 15 is placed on the transition chamber conveyor belt 111, the conveyor belt is started, and the material box 15 is transferred to the entrance of the externally heated sintering chamber 2; then the material box cylinder 112 is moved to a position relative to the material box 15 The piston rod of the pushing box oil cylinder 112 is extended to push the box 15 into the externally-heated sintering chamber 2 and is transmitted through the box 15 so that all the boxes 15 in the sintering chamber move.
推料盒油缸112采用可以移动结构，是为了避免妨碍过渡室传输带111上物料的放置和移动。因此，其可以采用多种结构实现移动，如：在过渡室设有与推料盒油缸112联接的驱动油缸113，通过驱动油缸113带动推料盒油缸112移动。驱动油缸113的缸体固定，驱动油缸113的活塞杆与推料盒油缸112联接；驱动油缸113可以设置有两个，且可垂直或水平设置，当垂直设置时即可实现推料盒油缸112的上下移动，当水平设置时即可实现推料盒油缸112的前后移动。The push box oil cylinder 112 adopts a movable structure in order to avoid hindering the placement and movement of the materials on the conveyor belt 111 of the transition chamber. Therefore, it can adopt a variety of structures to achieve movement, for example, a driving cylinder 113 coupled with the push box cylinder 112 is provided in the transition chamber, and the push box cylinder 112 is driven to move through the driving cylinder 113. The cylinder body of the driving cylinder 113 is fixed, and the piston rod of the driving cylinder 113 is connected to the push box cylinder 112; the driving cylinder 113 may be provided with two, and may be set vertically or horizontally, and when the setting is vertical, the push box cylinder 112 may be realized The up and down movement of the can realize the forward and backward movement of the pushing box cylinder 112 when it is horizontally set.
冷却室输送机构的主要作用是将外热式烧结室2内顶出的物料转移至冷却室3内，其具体包括出炉油缸311和出炉车312，出炉车312与出炉油缸311的活塞杆联接，出炉油缸311的缸体固定，通过出炉油缸311驱动出炉车312移动。出炉车312可以采用叉车式的结构。出炉隔离阀13开启，通过出炉油缸311收缩，使得出炉车312伸入烧结室内部一段距离，靠近烧结支架22，其叉车臂高度和烧结支架22等高，在推料盒油缸112推动进料的同时，将顶出烧结完成的料盒15，推到叉车臂上面。当推料完成后，出炉油缸311伸长，将出车移动到冷却室3进行冷却。The main function of the cooling chamber conveying mechanism is to transfer the material ejected from the externally-heated sintering chamber 2 to the cooling chamber 3, which specifically includes a furnace oil cylinder 311 and a furnace truck 312, which are connected to the piston rod of the furnace oil cylinder 311. The cylinder body of the tapping cylinder 311 is fixed, and the tapping truck 312 is driven to move by the tapping cylinder 311. The baked truck 312 may adopt a forklift-type structure. The discharge isolation valve 13 opens, and the discharge oil cylinder 311 contracts, so that the discharge truck 312 extends into the sintering chamber a certain distance, close to the sintering bracket 22, and its forklift arm height is equal to the sintering bracket 22. At the same time, push out the sintered box 15 and push it onto the forklift arm. When the pushing is completed, the delivery cylinder 311 is extended, and the delivery vehicle is moved to the cooling chamber 3 for cooling.
如图3至5所示，过渡室传输带111为可移式传输带，即其可联接有油缸等动力机构，通过动力机构实现其整体的移动。采用油缸时，该油缸的缸体固 定，活塞杆与传输带的机架(设有滚轮)联接，通过油缸的伸缩实现其移动；当然动力机构机构还可通过在其机架上设置电动滚轮等结构实现，具体可根据实际情况进行调整和设计。As shown in FIGS. 3 to 5, the transition chamber conveyor belt 111 is a movable conveyor belt, that is, it can be connected with a power mechanism such as an oil cylinder, and the overall movement can be achieved through the power mechanism. When an oil cylinder is used, the cylinder body of the oil cylinder is fixed, and the piston rod is connected to the frame of the conveyor belt (with rollers), and its movement is achieved through the expansion and contraction of the oil cylinder; of course, the power mechanism mechanism can also be equipped with electric rollers on its frame The realization of the structure can be adjusted and designed according to the actual situation.
当需要送料盒15时，可以通过动力机构(油缸伸长)驱动过渡室传输带111及其上的料盒15移动，使得过渡室输送带111与烧结支架22对接，可以减少其与烧结支架22之间的间隔，可以提高送料盒15时的连续平稳性。When the feed box 15 is needed, the transition chamber conveyor belt 111 and the feed box 15 on it can be driven to move through the power mechanism (elongation of the oil cylinder), so that the transition chamber conveyor belt 111 is docked with the sintering bracket 22, which can be reduced with the sintering bracket 22 The interval between them can improve the continuous stability of the feeding box 15 at the time.
还包括手套箱4(制备室)，手套箱4设置在真空过渡室1的一端，并通过真空过渡室1一端的隔离阀(过渡室隔离阀11)阻隔，手套箱4内的设有料盒存放仓41和传输带42，该传输带42将烧结料盒组传递到过渡室传输带111上。It also includes a glove box 4 (preparation chamber). The glove box 4 is provided at one end of the vacuum transition chamber 1 and is blocked by an isolation valve (transition chamber isolation valve 11) at one end of the vacuum transition chamber 1. The glove box 4 is provided with a material box for storage A silo 41 and a conveyor belt 42 that transfer the sinter box assembly to the transition chamber conveyor belt 111.
料盒存放仓41顶部设有密封门43，其内部设有升降台44，升降台44上放置有空的料盒15；通过开启密封门43，升降台44升起，工人拿取空料盒15，然后升降台44下降，关闭密封门。工人可以在手套箱4内进行操作：在料盒15内摆放工件，摆放后，可以直接将料盒15放置在传输带42上。上料时，开启过渡室隔离阀11，过渡室传输带111移动(油缸收缩)至过渡室传输带42处对接，启动传输带42将料盒15转移至过渡室传输带111上。A sealed door 43 is provided at the top of the magazine storage bin 41, and a lifting table 44 is provided inside. An empty magazine 15 is placed on the elevator table 44; by opening the sealed door 43, the elevator table 44 is raised and the worker takes the empty magazine 15. The lifting table 44 then descends, closing the sealed door. The worker can operate in the glove box 4: place the workpiece in the magazine 15 and after placing, the magazine 15 can be directly placed on the conveyor belt 42. When loading, the transition chamber isolation valve 11 is opened, the transition chamber conveyor belt 111 moves (the cylinder shrinks) to the transition chamber conveyor belt 42 to dock, and the conveyor belt 42 is activated to transfer the magazine 15 to the transition chamber conveyor belt 111.
手套箱4联接有磁场成型压机5，磁场成型压机5与手套箱4之间设有干式等静压机6和/或切割机7。上述，磁场成型压机5、干式等静压机6、切割机7、手套箱4之间可依次设置，其具体联接设置是本领域技术人员可以根据实际情况进行调整和设计的。通过上述设置，可以形成一个完整的生产线。磁场成型压机5、干式等静压机6和切割机7采用现有技术中的设备即可，优选采用专利申请号为201610448905.4公开的干式等静压机结构；优选采用专利申请号为201810850418.x公开的切割机结构。The glove box 4 is connected with a magnetic field forming press 5, and a dry isostatic press 6 and/or a cutting machine 7 are provided between the magnetic field forming press 5 and the glove box 4. As mentioned above, the magnetic field forming press 5, the dry isostatic press 6, the cutting machine 7, and the glove box 4 can be arranged in sequence, and the specific connection setting can be adjusted and designed by those skilled in the art according to the actual situation. Through the above settings, a complete production line can be formed. The magnetic field forming press 5, the dry isostatic press 6 and the cutting machine 7 may use the equipment in the prior art, preferably the dry isostatic press structure disclosed in the patent application number 201610448905.4; the patent application number is preferably used 201810850418.x discloses the structure of the cutting machine.
为了让连续炉处于效率最高，对于压制较小产品，压机效率较低的情况，应使用多台压机并联后和连续炉对接；对于圆柱类产品或不需要切割的产品，可去掉切割单元；对于工艺上不需要等静压的情况，可去掉干式等静压单元。In order to make the continuous furnace at the highest efficiency, for the pressing of smaller products and the efficiency of the press is lower, multiple presses should be connected in parallel and connected with the continuous furnace; for cylindrical products or products that do not need to be cut, the cutting unit can be removed ; For the case where the process does not require isostatic pressure, the dry isostatic pressure unit can be removed.
生产过程如下：将装有钕铁硼磁粉桶和压机对接、经过称量机及布料器、在磁场压机内预成型、自动抓取机构将其送到干式等静压工位、等静压后送到切割舱内进行切加工、在手套箱4内人工摆入烧结料盒15、将料盒15堆放在传输带42上。当一个托盘的料制备好后，打开过渡室隔离阀11进行转移。The production process is as follows: docking the NdFeB magnetic powder barrel and the press, passing through the weighing machine and distributor, preforming in the magnetic field press, and the automatic gripping mechanism will send it to the dry isostatic pressing station, etc. After static pressure, it is sent to the cutting cabin for cutting, manually placed in the sintering box 15 in the glove box 4, and the box 15 is stacked on the conveyor belt 42. When the material of one tray is prepared, the transition chamber isolation valve 11 is opened for transfer.
上述生产过程中，磁体在一个封闭的***完成，能很好的控制氧的含量。没有传统生产过程的等静压、剥带油的塑料膜、多次的进出密封舱，造成氧化和产品的不稳定现象。也节约了大量惰性气体、塑料包装物和大量的人工。本申请将磁场成型、等静压、烧结形成一个密封生产线，节约人工80％。In the above production process, the magnet is completed in a closed system, which can well control the oxygen content. There is no isostatic pressing in the traditional production process, peeling the plastic film with oil, and entering and leaving the sealed cabin many times, causing oxidation and product instability. Also save a lot of inert gas, plastic packaging and a lot of labor. In this application, magnetic field molding, isostatic pressing, and sintering form a sealed production line, which saves 80% of labor.
外热式烧结室2在进料口端处设有真空排气孔9，可以减少挥发物对高温区产品的污染，远离高温段；其另一端出料口处(靠近冷却室3的位置)设有气体调节阀10，可控制充入惰性气体的流量，如氩气。流量控制在0.1mL-100mL/min。真空度控制在0.1Pa--100Pa。The externally-heated sintering chamber 2 is provided with a vacuum exhaust hole 9 at the end of the feed port, which can reduce the pollution of the volatiles to the products in the high temperature area, away from the high temperature section; the other end of the discharge port (near the cooling chamber 3) A gas regulating valve 10 is provided to control the flow of inert gas, such as argon. The flow rate is controlled at 0.1mL-100mL/min. The vacuum degree is controlled at 0.1Pa-100Pa.
外热式烧结室2的炉膛直径为400-500mm为宜。烧结料盒15堆放截面小于300X300，这样在产品的烧结过程中温度均匀的速度会快的多，缩短烧结时间。The diameter of the furnace of the externally-heated sintering chamber 2 is preferably 400-500 mm. The stacking section of the sintering box 15 is less than 300X300, so that the temperature uniformity will be much faster during the sintering process of the product, and the sintering time will be shortened.
上面仅对本申请的较佳实施例作了详细说明，但是本申请并不限于上述实施例，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本申请宗旨的前提下作出各种变化，各种变化均应包含在本申请的保护范围之内。Only the preferred embodiments of the present application have been described in detail above, but the present application is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by a person of ordinary skill in the art, various aspects can be made without departing from the purpose of the present application Variations, all variations should be included in the scope of protection of this application.
Figure PCTCN2019120346-appb-000001
Figure PCTCN2019120346-appb-000001

Claims (5)

  1. 和传输带(42)。And transmission belt (42).
  2. 根据权利要求6所述的一种外热式真空连续烧结炉，其特征在于：所述料盒存放仓(41)顶部设有密封门(43)，其内部设有升降台(44)。An externally-heated vacuum continuous sintering furnace according to claim 6, characterized in that: a sealed door (43) is provided on the top of the storage box (41) of the material box, and a lifting table (44) is provided inside.
  3. 根据权利要求1所述的一种外热式真空连续烧结炉，其特征在于：所述手套箱(4)联接有磁场成型压机(5)。An external-heating vacuum continuous sintering furnace according to claim 1, characterized in that: the glove box (4) is connected with a magnetic field forming press (5).
  4. 根据权利要求8所述的一种外热式真空连续烧结炉，其特征在于：所述磁场成型压机(5)与手套箱(4)之间设有干式等静压机(6)和/或切割机(7)。An externally-heated vacuum continuous sintering furnace according to claim 8, characterized in that a dry isostatic press (6) and a dry isostatic press (6) are provided between the magnetic field forming press (5) and the glove box (4) /Or cutting machine (7).
  5. 根据权利要求1所述的一种外热式真空连续烧结炉，其特征在于：所述外热式烧结室(2)一端进料口处设有真空排气孔(9)，其另一端出料口处设有气体调节阀(10)。An externally-heated vacuum continuous sintering furnace according to claim 1, characterized in that: a vacuum exhaust hole (9) is provided at the inlet of one end of the externally-heated sintering chamber (2), and the other end is exited A gas regulating valve (10) is provided at the material port.
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