Hot pressing device

Abstract

The hot-pressing device is used for hot-pressing a roll core to be hot-pressed, the roll core is provided with a center hole, and the hot-pressing device comprises a supporting block which is configured to be contained in the center hole of the roll core, and the supporting block is provided with a first wall and a second wall which are oppositely arranged in the hot-pressing direction; the supporting structure is at least partially arranged in the supporting block; wherein the supporting structure is configured to at least apply acting force to the center hole in the hot pressing direction after hot pressing is finished, so that a gap is formed between the first wall and / or the second wall of the supporting block and the hole wall of the roll core, the taking-out difficulty of the supporting block is reduced, the supporting block is easily separated from the roll core, and therefore the taking-out efficiency of the supporting block is improved; and in the taking-out process, the hole wall of the roll core cannot be damaged, so that the service life and the safety of the battery are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically to a hot pressing device. Background Technology

[0002] Batteries are widely used in various industries due to their high energy density. During the cell manufacturing process, hot pressing is required after winding to achieve tight bonding of electrode sheets with different numbers of turns. However, because the spacing between the inner electrode sheets and the middle and outer electrode sheets is smaller, meaning the inner electrode sheets have a greater degree of bending, the foil at the bending point of the inner negative electrode sheet is prone to cracking / material loss. During subsequent charging and discharging, the thickness of the negative electrode sheet continuously increases and decreases (the charging negative electrode sheet becomes thicker, and the discharging negative electrode sheet becomes thinner), further exacerbating the cracking and posing certain safety hazards during battery use. Utility Model Content

[0003] In view of this, this application provides a hot pressing device to solve the technical problem in the prior art that the inner ring electrode of the battery cell is prone to cracking, resulting in low battery safety during use.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] This application provides a hot pressing apparatus for hot pressing a wound core to be hot pressed, the wound core having a center hole, the hot pressing apparatus comprising:

[0006] A support block is configured to be received in the center hole of the winding core, the support block having a first wall and a second wall disposed opposite to each other along the hot pressing direction;

[0007] The supporting structure is at least partially disposed inside the support block;

[0008] The supporting structure is configured to apply a force to the central hole in at least the hot-pressing direction after hot pressing, so that there is a gap between the first wall and / or the second wall of the support block and the hole wall of the core.

[0009] Optionally, in the above-mentioned hot pressing device, the supporting structure includes:

[0010] A gas passage is provided within the support block;

[0011] An inflation device for supplying air to the gas channel;

[0012] The gas passage extends through the first wall and / or the second wall.

[0013] Optionally, in the above-mentioned hot pressing device, the support block further includes a third wall and a fourth wall arranged along a first direction, the gas channel passing through the third wall and / or the fourth wall of the support block, and the first direction is configured to be consistent with the axial direction of the central hole.

[0014] Optionally, in the above-mentioned hot pressing device, the gas channel includes a plurality of first channels and second channels. Each first channel penetrates the first wall and / or the second wall along the hot pressing direction and forms an outlet of the gas channel in the first wall and / or the second wall. The second channel is connected to each of the first channels. The second channel penetrates the third wall and / or the fourth wall and forms an inlet of the gas channel in the third wall and / or the fourth wall.

[0015] Optionally, in the above-mentioned hot pressing device, the gas channel includes a mounting hole and a third channel. The first wall and / or the second wall of the support block are provided with a plurality of mounting holes, and each mounting hole is fitted with a lifting column that slides with it. Each mounting hole communicates with the third channel, and an outlet of the gas channel is formed at the bottom of each mounting hole. The third channel penetrates the third wall and / or the fourth wall, and an inlet of the gas channel is formed on the third wall and / or the fourth wall.

[0016] Optionally, in the above-mentioned hot pressing device, the gas channel further includes a mounting sleeve and an elastic element, the lifting column includes a columnar portion and a limiting portion, the mounting sleeve is installed at the opening of the mounting hole, and the mounting sleeve and the columnar portion of the lifting column are slidably engaged; the elastic element is sleeved on the columnar portion, and the elastic element is limited between the mounting sleeve and the limiting portion of the lifting column.

[0017] Optionally, in the above-mentioned hot pressing device, the supporting structure includes:

[0018] A receiving cavity is disposed on the first wall and / or the second wall of the support block;

[0019] A driving component is disposed within the accommodating cavity, and the driving end of the driving component and the accommodating cavity are slidably engaged along the hot-pressing direction.

[0020] Optionally, in the above-mentioned hot pressing device, the support block includes a main body and a protective layer, and the protective layer is provided on at least one side of the main body along the hot pressing direction.

[0021] Optionally, in the above-mentioned hot pressing device, the protective layer is foam, tape, or silicone; or,

[0022] The protective layer includes a first covering portion and a second covering portion disposed opposite to each other along the hot-pressing direction. In the first covering portion and the second covering portion, one includes a first portion and a second portion protruding from the first portion, and the other includes a third portion and a fourth portion protruding from the third portion. The first portion and the third portion respectively cover the two sides of the main body along the hot-pressing direction, and the second portion and the fourth portion are plugged together.

[0023] Optionally, in the above-mentioned hot-pressing device, along the hot-pressing direction, the size of the core is A, and the size of the support block is B, satisfying: when A ≤ 25 mm, B = (10% - 20%)A; when A > 25 mm, B = 5 mm ± 0.5 mm; and / or,

[0024] Along the second direction, the size of the central hole is C, and the size of the support block is D, wherein,

[0025] This application provides a hot pressing device, including a support block and a supporting structure. The support block is placed in the center hole of the core during hot pressing to reduce the bending degree of the core's bending angle. This can improve the problems of cracking of the inner ring electrode foil and material loss in the core, thus enhancing battery safety. After the core is hot pressed, the supporting structure applies a force to the hole wall in the hot pressing direction, thereby creating a gap between the first and / or second wall of the support block in the hot pressing direction and the hole wall of the core. This reduces the difficulty of removing the support block and makes it easy to separate the support block from the core, thereby improving the removal efficiency of the support block. Furthermore, the removal process does not damage the hole wall of the core, thus improving the battery's lifespan and safety. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 A flowchart illustrating the hot pressing process of the heat-pressed core provided in this application embodiment;

[0028] Figure 2 This is a schematic diagram of the structure of the hot pressing device provided in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of a support structure provided on a support block according to an embodiment of this application;

[0030] Figure 4 A schematic diagram showing a lifting column installed in a gas channel according to an embodiment of this application;

[0031] Figure 5 for Figure 4 The main view;

[0032] Figure 6 An enlarged view of a jacking column installed in a gas channel according to an embodiment of this application;

[0033] Figure 7 A schematic diagram of another supporting structure provided in an embodiment of this application;

[0034] Figure 8 This is a schematic diagram of the structure of a support block with a protective layer provided in an embodiment of this application;

[0035] Figure 9 This is a schematic diagram of the structure of the protective layer provided in the embodiments of this application;

[0036] Figure 10 The settings for the embodiments of this application are as follows Figure 9 A schematic diagram showing the positional relationship between the support block of the protective layer and the core to be hot-pressed before hot pressing.

[0037] exist Figures 1-10 middle:

[0038] 1. Core; 2. Support block;

[0039] 11. Center hole;

[0040] 21. First wall; 22. Second wall; 23. Third wall; 24. Fourth wall; 25. Protective layer; 26. Main body;

[0041] 31. Gas passage; 311. First passage; 312. Second passage; 313. Third passage; 314. Mounting hole; 32. Receiving cavity; 331. Mounting sleeve; 332. Lifting column; 333. Elastic element; 34. Driving element;

[0042] 251. First covering part; 252. Second covering part;

[0043] 2511. Part One; 2512. Part Two;

[0044] 2521. Part Three; 2522. Part Four. Detailed Implementation

[0045] This application provides a hot pressing device to solve the technical problem in the prior art that the inner ring electrode of the battery cell is prone to cracking, resulting in low battery safety during use.

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] like Figures 1-10 As shown, this application embodiment provides a hot pressing device for hot pressing a core 1 to be hot pressed. The core 1 has a central hole 11. The hot pressing device includes a support block 2 and a support structure. The support block 2 is used to place the core 1 in the central hole 11 before hot pressing to reduce the bending angle and bending degree of the core 1. This can improve the problem of cracking of the inner ring electrode foil and material loss in the material area of ​​the core 1, and improve the safety of the battery. The support structure is used to apply force to the hole wall of the core 1 along the hot pressing direction after the core 1 is hot pressed.

[0048] Specifically, the support block 2 is disposed in the central hole 11 of the winding core 1, and has a first wall 21 and a second wall 22 disposed opposite to each other in the hot pressing direction; at least part of the supporting structure is disposed inside the support block 2. After the winding core 1 is hot-pressed, the supporting structure can at least apply a force to the central hole 11 of the winding core 1 in the hot pressing direction, so that there is a gap between the first wall 21 and / or the second wall 22 of the support block 2 and the hole wall of the winding core 1, so as to facilitate the removal of the support block 2 from the central hole 11 of the winding core 1 after hot pressing, that is, reduce the difficulty of removing the support block 2, and easily separate the support block 2 from the winding core 1, thereby improving the removal efficiency of the support block 2, and the hole wall of the winding core 1 will not be damaged during the removal process, thus improving the battery's service life and safety.

[0049] like Figure 3 and Figure 5 As shown, the supporting structure includes: a gas channel 31, disposed within the support block 2; and an inflation device for supplying air to the gas channel 31; wherein the gas channel 31 penetrates the first wall 21 and / or the second wall 22. It can be understood that because the gas channel 31 penetrates the first wall 21 and / or the second wall 22, when the inflation device supplies air to the gas channel 31, the gas thrust or the gas pushes up the structure located within the gas channel 31, thereby applying a force to the wall of the central hole 11 in the thermo-pressing direction, so that there is a gap between the first wall 21 and / or the second wall 22 and the hole wall of the core 1. The working principle of the above-mentioned supporting structure is simple and highly practical.

[0050] Furthermore, refer to Figure 2 and Figure 3The support block 2 also includes a third wall 23 and a fourth wall 24 arranged along a first direction. The gas channel 31 passes through the third wall 23 and / or the fourth wall 24 of the support block 2. The first direction is configured to be consistent with the axial direction of the central hole 11. It can be understood that the air inlet of the gas channel 31 is located in the third wall 23 and / or the fourth wall 24. The gas channel 31 is connected by inserting a pipe on the inflation device. This not only facilitates the connection between the inflation device and the gas pipe, but also facilitates the pipe connected to the gas pipe to be led out of the central hole 11 of the core 1.

[0051] Furthermore, along the first direction, the size of the support block 2 is equal to the size of the core 1, or the size of the support block 2 is larger than the size of the core 1. Preferably, along the first direction, when the size of the support block 2 is larger than the size of the core 1, the air inlet of the gas channel 31 can be located not only on the third wall 23 and / or the fourth wall 24 of the support block 2, but also on the portion of the first wall 21 and / or the second wall 22 of the support block 2 that is exposed outside the central hole 11, thus making the air inlet of the gas channel 31 flexible in its location.

[0052] like Figure 2 and Figure 3 In the first embodiment shown, in order to allow the gas to act directly on the hole wall of the core 1, the gas channel 31 includes a plurality of first channels 311 and second channels 312. Each first channel 311 penetrates the first wall 21 and / or the second wall 22 along the hot pressing direction, and forms an outlet of the gas channel 31 in the first wall 21 and / or the second wall 22. The second channel 312 is connected to each of the first channels 311. The second channel 312 penetrates the third wall 23 and / or the fourth wall 24, and forms an inlet of the gas channel 31 in the third wall 23 and / or the fourth wall 24.

[0053] It is understood that the first channel 311 has one air outlet, and the air outlet of the first channel 311 is formed on the first wall 21 or the second wall 22, or the first channel 311 has two air outlets, and the two air outlets are formed on the first wall 21 and the second wall 22 respectively. The second channel 312 has one air inlet, and the air inlet of the second channel 312 is formed on the third wall 23 or the fourth wall 24, or the second channel 312 has two air inlets, and the two air inlets of the second channel 312 are formed on the third wall 23 and the fourth wall 24 respectively. All first channels 311 and second channels 312 are connected.

[0054] After the core 1 has finished heating, the inflation device is activated. Gas flows into the second channel 312 from the air inlet, then disperses into each of the first channels 311, and flows out from the air outlet of the first channel 311. This pushes the hole wall of the core 1 in the heat-pressing direction, creating a gap between the hole wall and the first wall 21 and / or the second wall 22. Thus, the above-mentioned support structure uses gas to push the hole wall of the core 1, making it easier to remove the support block 2. This support structure is simple in construction and highly safe.

[0055] It should be noted that multiple first channels 311 can be set, and multiple first channels 311 are evenly distributed in the support block 2. Of course, only one first channel 311 can be set, in which case the first channel 311 is located at the center of the support block 2.

[0056] like Figure 4 , Figure 5 and Figure 6 In the second embodiment shown, in order to allow gas to indirectly act on the hole wall of the core 1 through the lifting column 332, the gas channel 31 includes a mounting hole 314 and a third channel 313. The first wall 21 and / or the second wall 22 of the support block 2 are provided with a plurality of mounting holes 314, and each mounting hole 314 is fitted with a lifting column 332 that slides with it. Each mounting hole 314 is connected to the third channel 313, and an outlet of the gas channel 31 is formed at the bottom of each mounting hole 314. The third channel 313 penetrates the third wall 23 and / or the fourth wall 24, and an inlet of the gas channel 31 is formed in the third wall 23 and / or the fourth wall 24.

[0057] It can be understood that when the first wall 21 or the second wall 22 of the support block 2 is provided with mounting holes 314, the third channel 313 has air outlets, and the number of air outlets is the same as the number of mounting holes 314. For example, if the first wall 21 or the second wall 22 of the support block 2 is provided with two mounting holes 314, the third channel 313 has two air outlets, and the two air outlets are distributed and formed at the bottom of the two mounting holes 314. When mounting holes 314 are provided in both the first wall 21 and the second wall 22 of the support block 2, the third channel 313 has air outlets. The number of air outlets is equal to the sum of the number of mounting holes 314 in the first wall 21 and the number of mounting holes 314 in the second wall 22. For example, if the first wall 21 of the support block 2 has one mounting hole 314 and the second wall 22 of the support block 2 has two mounting holes 314, then the third channel 313 has three air outlets. One of the three air outlets is located at the bottom of the mounting hole 314 in the first wall 21, and the remaining two air outlets are respectively located at the bottoms of the two mounting holes 314 in the second wall 22. The air inlet of the gas channel 31 is located in the third wall 23 and / or the fourth wall 24.

[0058] During the hot pressing of the core 1, the lifting column 332 does not protrude from the mounting hole 314. After the core 1 is heated, the inflation device is started. Gas flows into the third channel 313 from the air inlet and then flows out from the air outlet and acts on the lifting column 332. Under the push of the gas, the lifting column 332 slides in the mounting hole 314 and protrudes from the mounting hole 314, so that the lifting column 332 can push the hole wall of the core 1, thereby creating a gap between the hole wall and the first wall 21 and / or the second wall 22. It can be seen that the working principle of this support structure is simple and very reliable.

[0059] It should be noted that multiple mounting holes 314 can be provided, and the multiple mounting holes 314 are evenly distributed in the support block 2. Of course, only one mounting hole 314 can be provided, in which case the mounting hole 314 is located at the center of the support block 2.

[0060] Furthermore, such as Figure 6 As shown, the gas channel 31 also includes a mounting sleeve 331 and an elastic member 333. The lifting column 332 includes a columnar portion and a limiting portion. The mounting sleeve 331 is installed at the opening of the mounting hole 314, and the mounting sleeve 331 and the columnar portion of the lifting column 332 are slidably fitted together. The elastic member 333 is sleeved on the columnar portion and is limited between the mounting sleeve 331 and the limiting portion of the lifting column 332.

[0061] When the lifting column 332 is pushed by gas, the elastic element 333 between the limiting part and the mounting sleeve 331 is compressed, and the columnar part can slide within the mounting sleeve 331. The lifting column 332 is pushed by gas until the columnar part protrudes from the mounting hole 314 and can push the hole wall of the core 1. At this time, there is a gap between the hole wall and the first wall 21 and / or the second wall 22, thereby improving the efficiency of removing the support block 2 after the core 1 is hot-pressed. When the lifting is completed and the support block 2 needs to be removed, simply reduce the air pressure in the third channel. The elastic element 333 will reset the columnar part of the lifting column 332 so that it does not protrude from the mounting hole 314, thus facilitating the removal of the support block 2.

[0062] It should be noted that the mounting sleeve 331 can be threaded to the mounting hole 314 or it can be interference-fitted to the mounting hole 314, as long as the mounting sleeve 331 and the support block 2 are fixedly connected; in addition, the end face of the columnar part that can contact the hole wall of the core 1 can be a plane or an arc surface. Preferably, the end face of the columnar part that can contact the hole wall of the core 1 is a plane.

[0063] In some other optional embodiments, in addition to the above-described configuration, the gas channel 31 may also include a fourth channel and a lifting member. The inlet of the fourth channel is located on the third wall 23 and / or the fourth wall 24, and the outlet is located inside the support block 2 along the hot-pressing direction. A supporting outlet member is provided at the outlet to support the lifting member and allow gas to pass through. The supporting outlet member may be an annular member arranged radially inward along the outlet. The large ring of the annular member is connected to the edge of the outlet, and the small ring of the annular member forms an opening for gas to pass through. The portion between the large ring and the small ring is used to support the lifting member so that gas can pass through the opening and push the lifting member, causing the lifting member to protrude from the first wall 21 and / or the second wall 22. Alternatively, the supporting outlet member may be a mesh structure provided at the outlet, allowing gas to pass through the mesh of the mesh structure, thereby pushing the lifting member and causing the lifting member to protrude from the first wall 21 and / or the second wall 22.

[0064] Independent of the first and second embodiments, such as Figure 7 In the third embodiment shown, the supporting structure includes: a receiving cavity 32 disposed on the first wall 21 and / or the second wall 22 of the support block 2; and a driving member 34 disposed in the receiving cavity 32, wherein the driving end of the driving member 34 and the receiving cavity 32 slide in cooperation along the hot pressing direction.

[0065] Understandably, the first wall 21 and / or the second wall 22 of the support block 2 are recessed to form a receiving cavity 32. The driving member 34 is located within the receiving cavity 32 and is fixedly connected to the support block 2, wherein the driving member 34 is a signal-controlled telescopic member, such as an electric telescopic rod.

[0066] When the core 1 is hot-pressed, the driving end of the driving member 34 does not protrude from the first wall 21 and / or the second wall 22 of the support block 2. After the core 1 is hot-pressed, the driving end of the driving member 34 extends out of the first wall 21 or the second wall 22 to apply force to the hole wall of the core 1, so that there is a gap between the hole wall and the first wall 21 or the second wall 22. It can be seen that the support structure is simple, reliable and occupies little space.

[0067] It should be noted that multiple accommodating cavities 32 can be provided, and the multiple accommodating cavities 32 are evenly distributed in the support block 2. Of course, only one accommodating cavity 32 can be provided, in which case the accommodating cavity 32 is located at the center of the support block 2.

[0068] In some alternative embodiments, such as Figure 8 As shown, the support block 2 includes a main body 26 and a protective layer 25. The protective layer 25 is provided on at least one side of the main body 26 along the hot pressing direction. The main body 26 of the support block 2 has a certain strength. The protective layer 25 on the main body 26 can effectively prevent the main body 26 from damaging the core 1, making the contact between the main body 26 and the core 1 a soft contact, thus enhancing the practicality of the support block 2.

[0069] It is understandable that when a protective layer 25 is provided on one side of the main body 26 along the hot-pressing direction, the side of the protective layer 25 facing away from the main body 26 is the first wall 21, and the side of the main body 26 facing away from the protective layer 25 is the second wall 22; while when protective layers 25 are provided on both sides of the main body 26 along the hot-pressing direction, the side of the first protective layer 25 facing away from the main body 26 is the first wall 21, and the side of the second protective layer 25 facing away from the main body 26 is the second wall 22.

[0070] Specifically, the protective layer 25 is made of foam, tape, or silicone, and the main body 26 is made of metal.

[0071] Understandably, the protective layer 25 can be applied to the surface of the main body 26 by adhesive. Of course, in some other embodiments, such as... Figure 9 and Figure 10 As shown, the protective layer 25 includes a first covering portion 251 and a second covering portion 252 disposed opposite to each other along the hot pressing direction. In the first covering portion 251 and the second covering portion 252, one includes a first portion 2511 and a second portion 2512 protruding from the first portion 2511, and the other includes a third portion 2521 and a fourth portion 2522 protruding from the third portion 2521. The first portion 2511 and the third portion 2521 respectively cover the two sides of the main body 26 along the hot pressing direction, and the second portion 2512 and the fourth portion 2522 are connected by insertion.

[0072] The first cover 251 and the second cover 252 are connected by a plug-in connection, which facilitates the installation and removal of the protective layer 25. The main body 26 can be reused for support blocks 2 that are at least the same in the hot pressing direction, so as to save costs.

[0073] In some optional embodiments, along the hot pressing direction, the size of the core 1 is A, and the size of the support block 2 is B, satisfying the following: when A≤25mm, B=(10%-20%)A, and when A>25mm, B=5mm±0.5mm.

[0074] It is understandable that when the thickness of the core 1 is less than or equal to 25mm, the thickness of the support block 2 is determined according to the thickness of the core 1. For example, if the thickness of the core 1 is 20mm, the thickness of the support block 2 is in the range of 2mm to 4mm. Specifically, the thickness of the support block 2 can be 2.2mm, 2.5mm, 2.8mm, 3.2mm, or 3.4mm. When the thickness of the core 1 is greater than 25mm, the thickness of the support block 2 is 5mm ± 0.5mm. For example, when the thickness of the core 1 is 30mm, 40mm, or 50mm, the thickness of the support block 2 is 5mm ± 0.5mm.

[0075] By designing the thickness of core 1 and support block 2 to satisfy the above relationship, the requirement to reduce the bending angle of core 1 after hot pressing can be met.

[0076] It should be noted that the thickness A of core 1 refers to the relevant dimensions of core 1 before hot pressing.

[0077] In some embodiments, along the second direction, the size of the central hole 11 is C, and the size of the support block 2 is D, wherein...

[0078] It is understandable that when the dimension of the support block 2 along the second direction is greater than 3 / 4 of the dimension of the center hole 11 along the second direction, it is not convenient for the support block 2 to be placed inside the center hole 11. When the dimension of the support block 2 along the second direction is less than 2 / 3 of the dimension of the center hole 11 along the second direction, it is not conducive to the support block 2 supporting the hole wall of the center hole 11. Therefore, when the dimensions of the support block 2 along the second direction and the dimensions of the center hole 11 along the second direction satisfy the above relationship, it is not only convenient for the support block 2 to be placed inside the center hole 11, but also ensures the support block 2 supporting the hole wall of the center hole 11, thereby not affecting the hot pressing of the core 1.

[0079] It should be noted that the dimension C of the center hole 11 is the relevant dimension of the core 1 before hot pressing.

[0080] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0081] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0082] It should also be noted that in the apparatus, equipment, and hot pressing apparatus of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0083] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0084] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0085] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A hot pressing apparatus for hot pressing a core (1) to be hot pressed, the core (1) having a center hole (11), characterized in that, The hot pressing device includes: The support block (2) is configured to be received in the center hole (11) of the core (1), and the support block (2) has a first wall (21) and a second wall (22) disposed opposite to each other in the hot pressing direction; The supporting structure is at least partially disposed inside the support block (2); The supporting structure is configured to apply a force to the center hole in at least the hot pressing direction after the hot pressing is completed, so that there is a gap between the first wall (21) and / or the second wall (22) of the support block (2) and the hole wall of the core (1).

2. The hot pressing device according to claim 1, characterized in that, The supporting structure includes: Gas passage (31) is provided inside the support block (2); An inflation device for venting the gas passage (31); The gas passage (31) penetrates the first wall (21) and / or the second wall (22).

3. The hot pressing device according to claim 2, characterized in that, The support block (2) further includes a third wall (23) and a fourth wall (24) arranged along a first direction, and the gas channel (31) passes through the third wall (23) and / or the fourth wall (24) of the support block (2). The first direction is configured to be consistent with the axial direction of the central hole (11).

4. The hot pressing device according to claim 3, characterized in that, The gas passage (31) includes a plurality of first passages (311) and second passages (312). Each first passage (311) penetrates the first wall (21) and / or the second wall (22) along the hot-pressing direction, and an outlet of the gas passage (31) is formed in the first wall (21) and / or the second wall (22). The second passage (312) is connected to each of the first passages (311). The second passage (312) penetrates the third wall (23) and / or the fourth wall, and an inlet of the gas passage (31) is formed in the third wall (23) and / or the fourth wall (24).

5. The hot pressing device according to claim 3, characterized in that, The gas channel (31) includes a mounting hole (314) and a third channel (313). The first wall (21) and / or the second wall (22) of the support block (2) are provided with a plurality of mounting holes (314). Each mounting hole (314) is equipped with a lifting column (332) that slides with it. Each mounting hole (314) is connected to the third channel (313), and an outlet of the gas channel (31) is formed at the bottom of each mounting hole (314). The third channel (313) penetrates the third wall (23) and / or the fourth wall (24), and an inlet of the gas channel (31) is formed on the third wall (23) and / or the fourth wall (24).

6. The hot pressing device according to claim 5, characterized in that, The gas channel (31) further includes a mounting sleeve (331) and an elastic element (333). The lifting column (332) includes a columnar portion and a limiting portion. The mounting sleeve (331) is installed at the opening of the mounting hole. The mounting sleeve (331) and the columnar portion of the lifting column (332) are slidably engaged. The elastic element (333) is sleeved on the columnar portion and is limited between the mounting sleeve (331) and the limiting portion of the lifting column (332).

7. The hot pressing device according to claim 1, characterized in that, The supporting structure includes: A receiving cavity (32) is provided on the first wall (21) and / or the second wall (22) of the support block (2); A driving member (34) is disposed in the accommodating cavity (32), and the driving end of the driving member (34) and the accommodating cavity (32) slide together along the hot pressing direction.

8. The hot pressing apparatus according to any one of claims 1 to 7, characterized in that, The support block (2) includes a main body (26) and a protective layer (25), and the protective layer (25) is provided on at least one side of the main body (26) along the hot pressing direction.

9. The hot pressing device according to claim 8, characterized in that, The protective layer (25) is foam, tape, or silicone; or, The protective layer (25) includes a first cover portion (251) and a second cover portion (252) disposed opposite to each other along the hot-pressing direction. In the first cover portion (251) and the second cover portion (252), one includes a first part (2511) and a second part (2512) protruding from the first part (2511), and the other includes a third part (2521) and a fourth part (2522) protruding from the third part (2521). The first part (2511) and the third part (2521) respectively cover the two sides of the main body (26) along the hot-pressing direction, and the second part (2512) and the fourth part (2522) are plugged together.

10. The hot pressing apparatus according to any one of claims 1 to 7, characterized in that, Along the hot-pressing direction, the core (1) has a dimension of A, and the support block (2) has a dimension of B, satisfying the following: when A ≤ 25 mm, B = (10% - 20%)A; when A > 25 mm, B = 5 mm ± 0.5 mm; and / or, Along the second direction, the size of the central hole (11) is C, and the size of the support block (2) is D, where D = (2 / 3 - 3 / 4)C.

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