Vacuum hot pressing furnace

Abstract

The utility model discloses a vacuum hot-pressing furnace which comprises a furnace body, a furnace cover and an opening and closing driving device, the furnace body is fixedly installed on an installation foundation, a pressing head driven by a pressurizing driving device is installed on the furnace cover in a penetrating mode, and the opening and closing driving device comprises a moving seat and a driving assembly driving the moving seat to move in the reciprocating linear motion direction of the furnace cover. The furnace cover is installed on the movable base through an elastic connecting assembly, the furnace cover keeps closing the furnace body when the movable base moves within a set stroke range through the elastic connecting assembly, the pressurization driving device is installed on the movable base, and a movable supporting assembly used for being supported between the installation base and the movable base is installed on the installation base. The device has the advantages of being simple in structure, low in cost, capable of reducing performance requirements on equipment, prolonging service life, improving product quality and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of hot pressing sintering furnaces, in particular to a vacuum hot pressing furnace. Background Art

[0002] Vacuum hot pressing furnace is a common equipment for preparing products such as high-performance ceramics and powder metallurgy materials. The existing vacuum hot pressing furnace includes a furnace body and a heating device installed in the furnace body. Furnace covers are installed at both ends of the furnace body. Each furnace cover is driven by an opening and closing drive device (generally a telescopic cylinder) to move linearly to open and close the furnace body. A pressure head is installed through each furnace cover. The pressure head is driven by a pressure drive device installed on the furnace cover to reciprocate and telescopic motion. When working, after the material is loaded into the mold in the furnace, the furnace cover is closed, the heating device is started to heat, and the pressure drive device is used to drive the pressure head to compact the material, so as to perform hot pressing molding and high-temperature sintering on the material.

[0003] In the existing vacuum hot pressing furnace, since the pressurizing drive device is installed on the furnace cover, when the pressure head is driven to pressurize, the reaction force generated by the pressurization acts on the opening and closing drive device through the furnace cover. The opening and closing drive device needs to have the load performance required for pressurization, which increases the cost of the opening and closing drive device and reduces its service life. It is not conducive to ensuring the continuous stability of the pressure during pressurization, which in turn affects the product quality. In addition, the opening and closing drive device is rigidly connected to the furnace cover, and the position accuracy of the furnace cover is directly determined by the accuracy of the opening and closing drive device. In order to ensure the accurate position of the furnace cover and the furnace body when closing to avoid collision and other problems, the opening and closing drive device needs to have a high action accuracy, which will also increase the performance requirements of the opening and closing drive device and increase the control difficulty. In addition, furnace covers are provided at both ends of the furnace body of the existing vacuum hot pressing furnace, and each furnace cover is provided with an opening and closing drive device for opening and closing the furnace cover, which has the disadvantages of complex structure, large equipment volume and occupied space, and high cost. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a vacuum hot pressing furnace which has a simple structure and low cost and can reduce the performance requirements for the equipment, prolong the service life and improve the product quality.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A vacuum hot pressing furnace comprises a furnace body, a furnace cover and an opening and closing driving device for driving the furnace cover to reciprocate linearly to open and close the furnace body, wherein the furnace body is fixedly mounted on a mounting base, a pressure head driven by a pressurizing driving device is installed through the furnace cover, the opening and closing driving device comprises a moving seat and a driving component for driving the moving seat to move along the reciprocating linear motion direction of the furnace cover, the furnace cover is mounted on the moving seat through an elastic connecting component, the elastic connecting component enables the furnace cover to keep closing the furnace body when the moving seat moves within a set stroke range, the pressurizing driving device is mounted on the moving seat, and a movable supporting component for supporting between the mounting base and the moving seat is installed on the mounting base.

[0007] As a further improvement of the above vacuum hot pressing furnace:

[0008] The elastic connection assembly includes a plurality of elastic mechanisms, which include a guide rod fixedly connected to the furnace cover and a guide hole arranged on the movable seat. The guide rod and the guide hole are guided and matched along the reciprocating linear motion direction of the furnace cover. An elastic support member is connected between the furnace cover and the movable seat.

[0009] The elastic support member is a telescopic spring sleeved and installed outside the guide rod. The guide rod is threadedly connected with an adjusting nut that can adjust the connection position along the guide rod. The two ends of the telescopic spring are respectively in contact with the adjusting nut and the moving seat.

[0010] The installation base is provided with a guide component for guiding the movement of the moving seat.

[0011] The guide assembly comprises a plurality of guide posts arranged on a mounting base, and the movable seat is provided with a guide sleeve corresponding to each guide post and cooperating with the guide post.

[0012] A furnace opening is respectively provided at the upper and lower ends of the furnace body. The furnace opening at the lower end is provided with a furnace cover which is opened and closed by an opening and closing driving device, and the opening and closing driving device drives the furnace cover to move linearly up and down to open and close the furnace body. The furnace opening at the upper end is provided with an upper end cover fixedly installed on a mounting base, and a pressing head driven by an upper driving device is installed through the upper end cover.

[0013] The movable support assembly includes more than one support column, each support column is connected to a support switching assembly and can be driven by the support switching assembly to move between a first position and a second position. When the support column is in the first position, it is located on the back side of the moving seat and the furnace cover and the two ends of the support column can respectively correspond to the moving seat and the installation base. When the support column is in the second position, it is located outside the movement path of the moving seat to allow the moving seat to move back and forth with the furnace cover in a straight line to open and close the furnace body.

[0014] The support column moves between a first position and a second position in a translational motion, and the support switching assembly includes a swing arm rotatably mounted on a mounting base and a driving member that drives the swing arm to swing, the swing arm is connected to the support column and drives the support column to move between the first position and the second position during a swinging motion.

[0015] The support column is installed on the installation base through a guide rail mechanism and is guided by the guide rail mechanism to move along an arc track between a first position and a second position.

[0016] A method for using the vacuum hot pressing furnace comprises the following steps:

[0017] S1: The opening and closing driving device drives the movable seat to move the furnace cover to open the furnace body, and load the material to be processed into the furnace body;

[0018] S2: The opening and closing driving device drives the movable seat to move with the furnace cover, and when the furnace cover just closes the furnace body, the opening and closing driving device drives the movable seat to continue to move a certain distance in the direction of closing the furnace cover, so that the distance between the movable seat and the furnace cover is shortened, providing space for the support column to enter;

[0019] S3: the support switching assembly drives the support column to move to the first position, so that the support column is located on the back side of the movable seat and the furnace cover;

[0020] S4: the opening and closing driving device drives the movable seat to move a certain distance in the direction of opening the furnace cover until the movable seat abuts against the supporting column, and the furnace cover keeps closing the furnace body, and the vacuum hot pressing furnace works to process the material to be processed;

[0021] S5: After the processing of the material to be processed is completed, the opening and closing drive device drives the movable seat to continue to move in the direction of opening the furnace cover for a distance, so that the movable seat is separated from the support column, and then the support switching component drives the support column to move to the second position, and the opening and closing drive device drives the movable seat to continue to move in the direction of opening the furnace cover until the furnace cover is fully opened and the material is unloaded.

[0022] Compared with the prior art, the advantages of the utility model are:

[0023] When the vacuum hot pressing furnace of the utility model is working, after the opening and closing driving device drives the movable seat to close the furnace cover, the movable seat can be driven to continue to move a distance within a set travel range in the direction of closing the furnace cover under the action of the elastic connecting component, providing a placement space for the movable support component, and then the movable support component is placed between the installation base and the movable seat, and then the movable seat drives the movable seat to move in the direction of opening the furnace cover until it is offset with the movable support component while the furnace cover remains in a closed state. At this time, the reaction force generated by the pressurizing driving device during pressurization is directly transmitted to the installation base through the movable seat and the movable support component. The opening and closing driving device does not need to bear the load generated during pressurization, which can greatly reduce the performance requirements for the opening and closing driving device, reduce costs, extend the service life of the equipment, and ensure that the pressure is continuously stable during pressurization, which is beneficial to improving product quality. In addition, the movable support component only needs to adopt a simple support structure similar to a pad directly supported between the movable seat and the furnace cover. It is not only simple in structure, low in cost, and easy to implement, but also has high stability and reliability in transmitting the force. At the same time, the elastic connection component plays a buffering role when closing the furnace cover, which can avoid damage to the device due to rigid impact, reduce the performance and control requirements of the opening and closing drive device, and further reduce costs and extend equipment life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the main structure of the vacuum hot pressing furnace when the furnace cover is closed.

[0025] Figure 2 It is a schematic diagram of the local enlarged structure at the location of the elastic connection component.

[0026] Figure 3 for Figure 2 Enlarged structural diagram at A in the middle.

[0027] Figure 4 It is a schematic diagram of the side structure of the vacuum hot pressing furnace when the furnace cover is closed.

[0028] Figure 5 This is a schematic diagram of the structure of the vacuum hot pressing furnace when the furnace cover is closed.

[0029] Figure 6 This is a schematic diagram of the main structure of the vacuum hot pressing furnace when the furnace cover is opened.

[0030] Figure 7 This is a schematic diagram of the side structure of the vacuum hot pressing furnace when the furnace cover is opened.

[0031] Figure 8 This is a schematic diagram of the structure of the vacuum hot pressing furnace when the furnace cover is opened.

[0032] Legend:

[0033] 1. Furnace body; 2. Furnace cover; 3. Opening and closing drive device; 31. Moving seat; 32. Drive assembly; 4. Press head; 5. Pressurization drive device; 6. Elastic connection assembly; 61. Guide rod; 62. Guide hole; 63. Elastic support member; 64. Adjusting nut; 7. Movable support assembly; 71. Support column; 72. Support switching assembly; 721. Swing arm; 722. Drive member; 8. Guide assembly; 81. Guide column; 82. Guide sleeve; 9. Upper end cover; 10. Press head; 100. Installation foundation. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Embodiment 1:

[0036] like Figures 1 to 8As shown, the vacuum hot pressing furnace of this embodiment includes a furnace body 1, a furnace cover 2 and an opening and closing driving device 3 for driving the furnace cover 2 to reciprocate linearly to open and close the furnace body 1. The furnace body 1 is fixedly mounted on the mounting base 100. A pressure head 4 driven by a pressurizing driving device 5 is installed through the furnace cover 2. The opening and closing driving device 3 includes a moving seat 31 and a driving component 32 for driving the moving seat 31 to move along the reciprocating linear motion direction of the furnace cover 2. The furnace cover 2 is mounted on the moving seat 31 through an elastic connecting component 6. The elastic connecting component 6 enables the furnace cover 2 to keep closing the furnace body 1 when the moving seat 31 moves within a set stroke range, that is, the moving seat 31 moves with the furnace cover 2 from an open state to a closed state. When the furnace cover 2 just closes the furnace body 1, the moving seat 31 can also further move in the direction of closing the furnace cover 2 within the set stroke range. In this process, the moving seat 31 moves closer to the furnace cover 2. The pressurizing driving device 5 is installed on the moving seat 31. A movable supporting component 7 for supporting between the mounting base 100 and the moving seat 31 is installed on the mounting base 100. When the vacuum hot pressing furnace is working, after the opening and closing driving device 3 drives the movable seat 31 to close the furnace cover 2, the movable seat 31 can be driven to continue to move a certain distance in the set stroke range along the closing direction of the furnace cover 2 under the action of the elastic connecting component 6, so as to provide a placement space for the movable support component 7, and then the movable support component 7 is placed between the installation base 100 and the movable seat 31, and then the movable seat 31 drives the movable seat 31 to move in the opening direction of the furnace cover 2 until the furnace cover 2 is kept in the closed state and abuts against the movable support component 7, at which time the pressurizing driving device 5 pressurizes the movable support component 7. The reaction force generated during the operation is directly transmitted to the installation base 100 through the movable seat 31 and the movable support assembly 7. The opening and closing drive device 3 does not need to bear the load generated during the pressurization, which can greatly reduce the performance requirements of the opening and closing drive device 3, reduce costs, extend the service life of the equipment, and ensure that the pressure is continuously stable during pressurization, which is conducive to improving product quality. In addition, the movable support assembly 7 only needs to adopt a simple support structure similar to a pad directly supported between the movable seat 31 and the furnace cover 2. It is not only simple in structure, low in cost, easy to implement, but also has high stability and reliability in transmitting the force. At the same time, the elastic connection assembly 6 plays a buffering role when closing the furnace cover 2, which can avoid damage to the device caused by rigid impact, reduce the performance and control requirements of the opening and closing drive device 3, and can further reduce costs and extend the life of the equipment.

[0037] In this embodiment, the elastic connection assembly 6 includes multiple elastic mechanisms, which include a guide rod 61 fixed to the furnace cover 2 and a guide hole 62 provided on the movable seat 31. The guide rod 61 and the guide hole 62 are guided and matched along the reciprocating linear motion direction of the furnace cover 2, and an elastic support member 63 is connected between the furnace cover 2 and the movable seat 31. Through the cooperation of the guide rod 61 and the guide hole 62, the furnace cover 2 and the movable seat 31 are guided to move toward and away from each other in the opening and closing direction of the furnace cover 2. The elastic support member 63 realizes that when the movable seat 31 moves with the furnace cover 2 to the position of closing the furnace body 1, the movable seat 31 can also force the elastic support member 63 to elastically deform and continue to move in the closing direction of the furnace cover 2 within the set stroke range, providing space for the movable support assembly 7 to be placed between the installation base 100 and the movable seat 31, and the movable seat 31 forces the elastic support member 63 to elastically deform so that the furnace cover 2 can remain closed. After the movable support assembly 7 is placed between the installation base 100 and the movable seat 31, the movable seat 31 moves in the opening direction of the furnace cover 2 until it is against the movable support assembly 7, and the elastic support member 63 will elastically recover, so that the furnace cover 2 still remains closed. The structural form of this elastic connection assembly 6 has the advantages of simple and compact structure, low cost, and stable and reliable operation. In this embodiment, the elastic connection assembly 6 has a total of four elastic mechanisms, and the four elastic mechanisms are arranged around the furnace cover 2.

[0038] In this embodiment, the elastic support member 63 is a telescopic spring sleeved and installed outside the guide rod 61, which can improve the compactness of the structure and is reliably installed. The guide rod 61 is threadedly connected with an adjusting nut 64 that can adjust the connection position along the guide rod 61, and the two ends of the telescopic spring are respectively corresponding to the adjusting nut 64 and the movable seat 31. By adjusting the connection position of the adjusting nut 64 on the guide rod 61, the compression degree of the telescopic spring can be adjusted or telescopic springs of different lengths can be installed to meet the needs of different pressing forces when the furnace cover 2 is closed, thereby improving applicability.

[0039] In this embodiment, a guide assembly 8 for guiding the movement of the moving seat 31 is provided on the installation base 100, which can improve the working stability and safety. Preferably, the guide assembly 8 includes a plurality of guide posts 81 provided on the installation base 100, and the moving seat 31 is provided with a guide sleeve 82 for guiding and matching with each guide post 81, and the moving seat 31 can be guided to move accurately along the opening and closing direction of the furnace cover 2 through the guiding cooperation between the guide post 81 and the guide sleeve 82. The guide assembly 8 has the advantages of simple structure and stable and reliable operation.

[0040] In this embodiment, a furnace opening is provided at the upper and lower ends of the furnace body 1, respectively. The furnace opening at the lower end is provided with a furnace cover 2 driven to open and close by an opening and closing driving device 3, and the opening and closing driving device 3 drives the furnace cover 2 to move linearly up and down to open and close the furnace body 1, and the furnace opening at the upper end is provided with an upper end cover 9 fixedly installed on the mounting base 100, and a material pressing head 10 driven by the upper driving device is installed through the upper end cover 9. That is, compared with the traditional vacuum hot pressing furnace in which both ends are provided with a furnace cover 2 driven to open and close by an opening and closing driving device 3, the furnace body 1 of the vacuum hot pressing furnace in this embodiment is provided with a furnace cover 2 driven to open and close by an opening and closing driving device 3 only at one end, and a fixed upper end cover 9 is used at the other end to replace the openable furnace cover 2, but a material pressing head 10 is provided on the upper end cover 9 to cooperate with the pressing head 4 to press the material. Since the vacuum hot pressing furnace of this embodiment is only provided with an openable and closable furnace cover 2 at one end, a set of opening and closing driving devices 3 and a movable sealing component that meets the opening and closing movement requirements of the furnace cover 2 can be saved, which can simplify the equipment structure, reduce the equipment mention and occupied space, and save equipment manufacturing costs.

[0041] In this embodiment, the furnace body 1, the furnace cover 2 and the pressure head 4 are all prior art, the pressure head 10 and its driving device adopt the same configuration as the pressure head 4, and the upper end cover 9 can adopt the structure of the furnace cover 2, the only difference is that the upper end cover 9 is not provided with the opening and closing driving device 3. The driving component 32 of this embodiment is a telescopic cylinder installed on the installation base 100 and connected to the moving seat 31.

[0042] In this embodiment, Figure 1 , Figure 4 , Figures 5 to 8As shown, the movable support assembly 7 includes more than one support column 71, each support column 71 is connected to a support switching assembly 72 and can be driven by the support switching assembly 72 to move between a first position and a second position, when the support column 71 is in the first position, it is located on the back side of the movable seat 31 and the furnace cover 2, and the two ends of the support column 71 can respectively correspond to the movable seat 31 and the installation base 100. That is, when the support column 71 is located in the first position on the back side of the movable seat 31 and the furnace cover 2, the movable seat 31 can move within the set stroke range to keep the furnace cover 2 closed The furnace body 1 can be abutted against the support column 71, so that the two ends of the support column 71 respectively correspond to the movable seat 31 and the installation base 100. The reaction force generated when the pressurizing drive device 5 is pressurized is transmitted to the installation base 100 through the movable seat 31 and the movable support assembly 7, and the support column 71 is located outside the movement path of the movable seat 31 in the second position to allow the movable seat 31 to move back and forth with the furnace cover 2 along a straight line to open and close the furnace body 1, thereby ensuring normal opening and closing of the furnace body 1. The movable support assembly 7 only adopts a support column 71 with a simple structure and a support switching assembly 72 for driving the support column 71 to move between a first position and a second position, and cooperates with the installation structure of the furnace cover 2 to keep the furnace cover 2 closed when the movable seat 31 moves within a set stroke range, so that the support column 71 is on the side facing away from the movable seat 31 and the furnace cover 2, and the movable seat 31 moves so that the two ends of the support column 71 can respectively correspond to the movable seat 31 and the installation base 100, and the support column 71 can stably and reliably support the movable seat 31 on the installation base 100, thereby facilitating stable and reliable pressurization operation. On the basis of realizing the movable support assembly 7 with a simple and compact structure, low cost, and easy operation and control, the stability, reliability and convenience of the pressurization work are guaranteed at the same time.

[0043] In this embodiment, the support column 71 moves between the first position and the second position in a translational motion, which is conducive to simplifying the structure of the support switching assembly 72 and improving the smoothness and reliability of the movement of the support column 71. The support switching assembly 72 includes a swing arm 721 rotatably mounted on the mounting base 100 and a driving member 722 for driving the swing arm 721 to swing. The swing arm 721 is connected to the support column 71 and drives the support column 71 to move between the first position and the second position during the swinging motion. The support switching assembly 72 has the advantages of compact structure, easy control, and stable and reliable operation. The driving member 722 can be a telescopic oil cylinder with an articulated installation. The telescopic rod of the telescopic oil cylinder is articulated with the swing arm 721, and the swing arm 721 can be driven to swing through the telescopic motion.

[0044] In this embodiment, the support column 71 is installed on the installation base 100 through a guide rail mechanism and is guided by the guide rail mechanism to move between the first position and the second position along an arc track, which is conducive to saving space. In other embodiments, the support column 71 can also move between the first position and the second position along a straight track or other forms of tracks, as long as it can switch between the first position and the second position.

[0045] The installation base 100 of this embodiment includes an upper beam and a lower beam located below the upper beam, each guide column 81 of the guide assembly 8 is connected between the upper beam and the lower beam, the support column 71 is installed on the lower beam through a guide rail mechanism, and the upper end cover 9, the pressing head 10 and the driving mechanism for driving the pressing head 10 are fixedly installed on the upper beam. The opening and closing driving device 3 is a telescopic cylinder.

[0046] Embodiment 2:

[0047] A method for using the vacuum hot pressing furnace of embodiment 1 comprises the following steps:

[0048] S1: The opening and closing driving device 3 drives the moving seat 31 to move the furnace cover 2 to open the furnace body 1, and the material to be processed is loaded into the furnace body 1;

[0049] S2: The opening and closing driving device 3 drives the movable seat 31 to move with the furnace cover 2. When the furnace cover 2 just closes the furnace body 1, the opening and closing driving device 3 drives the movable seat 31 to continue to move a certain distance in the direction of closing the furnace cover 2, so that the distance between the movable seat 31 and the furnace cover 2 is shortened, providing space for the support column 71 to enter;

[0050] S3: the support switching assembly 72 drives the support column 71 to move to the first position, so that the support column 71 is located at the side facing away from the movable seat 31 and the furnace cover 2;

[0051] S4: The closing drive device 3 drives the movable seat 31 to move a certain distance in the direction of opening the furnace cover 2 until the movable seat 31 abuts against the support column 71, and the furnace cover 2 keeps closing the furnace body 1, and the vacuum hot pressing furnace works to process the material to be processed;

[0052] S5: After the processing of the material to be processed is completed, the closing drive device 3 drives the moving seat 31 to continue to move in the direction of opening the furnace cover 2 for a distance, so that the moving seat 31 is separated from the support column 71, and then the support switching component 72 drives the support column 71 to move to the second position, and the closing drive device 3 drives the moving seat 31 to continue to move in the direction of opening the furnace cover 2 until the furnace cover 2 is fully opened and the material is unloaded.

[0053] The method for using the vacuum hot pressing furnace of this embodiment adopts the vacuum hot pressing furnace of Example 1, which not only has the advantages of the vacuum hot pressing furnace, but also can perform stable and reliable vacuum hot pressing treatment on materials according to process requirements, thereby improving product quality.

[0054] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, improvements and changes obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A vacuum hot pressing furnace, comprising a furnace body (1), a furnace cover (2) and an opening and closing driving device (3) for driving the furnace cover (2) to reciprocate linearly to open and close the furnace body (1), wherein the furnace body (1) is fixedly mounted on a mounting base (100), and a pressure head (4) driven by a pressure driving device (5) is installed through the furnace cover (2), characterized in that: The opening and closing drive device (3) comprises a movable seat (31) and a drive component (32) for driving the movable seat (31) to move along the reciprocating linear motion direction of the furnace cover (2); the furnace cover (2) is mounted on the movable seat (31) via an elastic connection component (6); the elastic connection component (6) enables the furnace cover (2) to keep closing the furnace body (1) when the movable seat (31) moves within a set travel range; the pressurizing drive device (5) is mounted on the movable seat (31); and a movable support component (7) for supporting between the mounting base (100) and the movable seat (31) is mounted on the mounting base (100).

2. The vacuum hot pressing furnace according to claim 1, characterized in that: The elastic connection assembly (6) comprises a plurality of elastic mechanisms, wherein the elastic mechanisms comprise a guide rod (61) fixedly connected to the furnace cover (2) and a guide hole (62) provided on the movable seat (31); the guide rod (61) and the guide hole (62) cooperate with each other in guiding along the reciprocating linear motion direction of the furnace cover (2); and an elastic support member (63) is connected between the furnace cover (2) and the movable seat (31).

3. The vacuum hot pressing furnace according to claim 2, characterized in that: The elastic support member (63) is a telescopic spring sleeved and installed outside the guide rod (61); an adjusting nut (64) capable of adjusting the connection position along the guide rod (61) is threadedly connected to the guide rod (61); two ends of the telescopic spring are respectively in contact with the adjusting nut (64) and the movable seat (31).

4. The vacuum hot pressing furnace according to claim 1, characterized in that: The installation base (100) is provided with a guide assembly (8) for guiding the movement of the moving seat (31).

5. The vacuum hot pressing furnace according to claim 4, characterized in that: The guide assembly (8) comprises a plurality of guide posts (81) arranged on a mounting base (100), and the movable seat (31) is provided with a guide sleeve (82) corresponding to each guide post (81) for guiding the guide post.

6. The vacuum hot pressing furnace according to claim 1, characterized in that: The furnace body (1) is provided with a furnace opening at the upper and lower ends respectively. The furnace opening at the lower end is provided with the furnace cover (2) which is driven to open and close by an opening and closing driving device (3), and the opening and closing driving device (3) drives the furnace cover (2) to move linearly up and down to open and close the furnace body (1). The furnace opening at the upper end is provided with an upper end cover (9) fixedly mounted on a mounting base (100), and a material pressing head (10) driven by an upper driving device is installed through the upper end cover (9).

7. The vacuum hot pressing furnace according to any one of claims 1 to 6, characterized in that: The movable support assembly (7) comprises one or more support columns (71), each support column (71) is connected to a support switching assembly (72) and can be driven by the support switching assembly (72) to move between a first position and a second position. When the support column (71) is in the first position, it is located on the back side of the movable seat (31) and the furnace cover (2), and the two ends of the support column (71) can respectively correspond to the movable seat (31) and the installation base (100). When the support column (71) is in the second position, it is located outside the movement path of the movable seat (31) to allow the movable seat (31) to move back and forth with the furnace cover (2) in a straight line to open and close the furnace body (1).

8. The vacuum hot pressing furnace according to claim 7, characterized in that: The support column (71) moves between a first position and a second position in a translational motion, and the support switching assembly (72) includes a swing arm (721) rotatably mounted on a mounting base (100) and a driving member (722) for driving the swing arm (721) to swing, wherein the swing arm (721) is connected to the support column (71) and drives the support column (71) to move between the first position and the second position during the swinging motion.

9. The vacuum hot pressing furnace according to claim 8, characterized in that: The support column (71) is installed on the installation base (100) via a guide rail mechanism and is guided by the guide rail mechanism to move along an arc track between a first position and a second position.

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