Graphite sagger forming die

Abstract

The utility model discloses a multi-functional molding machine which can realize various molding processes. The graphite sagger forming mold is simple and convenient to operate and convenient to demold. The graphite sagger forming mold comprises a base, a demolding device is arranged above the base; a first lifting block and a second lifting block which are driven by respective lifting devices to move up and down are arranged on the two sides of the demolding device; a forming base is arranged above the demolding device; an outer mold frame is arranged above the forming base; a middle mold frame is arranged in the outer mold frame; a mold core is arranged in the middle mold frame; a second limiting structure is arranged at the upper end of the mold core; a first limiting structure is arranged at the upper end of the middle mold frame; a first positioning structure is arranged on the first lifting block; a second positioning structure is arranged on the second lifting block; the first limiting structure and the second limiting structure are both matched with the positioning structure. The graphite sagger forming die is convenient to operate, and the production cost can be reduced; the production efficiency is improved and the product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sagger forming, in particular to a graphite sagger forming die. Background Art

[0002] Graphite sagger is a high-temperature refractory material characterized by high refractoriness and thermal conductivity. It is widely used in many fields, such as lithium batteries and lithium iron phosphate sintering. In these applications, graphite sagger primarily serves as a container for anode material powder. It is placed in a graphitization furnace and heated to graphitize and purify the anode material.

[0003] However, the production process of graphite crucibles is relatively complicated, requiring multiple steps including raw material preparation, molding, drying, sintering, and surface treatment. Molding is the key step in graphite crucible production, and can be mainly divided into two categories: isostatic pressing, cold pressing, and compression molding. Isostatically pressed graphite crucibles are isotropic and have good heat resistance, good uniformity, and good thermal and electrical conductivity. However, their dimensions and shape are difficult to guarantee, and the post-molding baking cycle is long. Compression molded graphite crucibles have a higher density and good flexural and compressive strength, but compression molded graphite crucibles have a higher electrical resistance, uneven density distribution, and are prone to cracking during use, leading to increased production costs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a graphite sagger forming die which can realize multiple forming processes and is easy to operate and demould.

[0005] The technical solution adopted by the utility model to solve the technical problem is as follows: a graphite sagger forming mold comprises a base; a demoulding device is provided above the base; a first lifting block driven up and down by a first lifting device and a second lifting block driven up and down by a second lifting device are provided on both sides of the demoulding device; the second lifting block is located below the first lifting block;

[0006] A molding base is provided above the demoulding device; an outer mold frame is provided above the molding base; a middle mold frame is provided inside the outer mold frame; a mold core is provided inside the middle mold frame;

[0007] The molding base has a molding cavity and a mounting groove matching the outer mold frame; a first heating device for heating the molding cavity is provided in the molding base;

[0008] A second heating device for heating the inner wall of the outer mold frame is provided inside the inner wall of the outer mold frame; specifically, the inner wall of the outer mold frame has an annular inner cavity; a second heating device for heating the inner wall of the outer mold frame is provided inside the annular inner cavity; an annular sealing cover for sealing the annular inner cavity is provided at the upper end of the outer mold frame;

[0009] The outer surface of the middle mold frame matches the inner cavity of the outer mold frame; a flange is provided at the upper end of the middle mold frame; and first limiting structures are provided on two opposite side surfaces at both ends of the flange;

[0010] A first annular bracket is provided above the flange; a second annular bracket is provided below the flange; a support column is provided between the first annular bracket and the second annular bracket; the support column passes through the flange; adjustment nuts are provided on the upper and lower surfaces of the flange; the adjustment nuts are threadedly engaged with the support column;

[0011] The outer surface of the mold core matches the inner cavity of the middle mold frame; a connecting frame is provided at the upper end of the mold core; the lower end of the connecting frame is connected to the mold core; two opposite sides of the upper end of the connecting frame are provided with a second limiting structure;

[0012] The first lifting block is provided with a first positioning structure that can be laterally extended and retracted; the first limiting structure and the second limiting structure are both matched with the first positioning structure;

[0013] Specifically, a transverse moving block is provided on the first lifting block; a transverse telescopic device is provided between the first lifting block and the transverse moving block; a first positioning structure is provided on one side surface of the transverse moving block;

[0014] The second lifting block is provided with a second positioning structure that can be laterally extended and retracted; the first limiting structure and the second limiting structure are both matched with the second positioning structure.

[0015] Furthermore, the first lifting device includes a first driving screw; guide columns are provided on both sides of the first driving screw; and a first driving device is provided at the lower end of the first driving screw;

[0016] The first driving screw and the upper end of the guide column both pass through the first lifting block; the first driving screw is threadedly engaged with the first lifting block;

[0017] The second lifting device includes a second driving screw; the lower end of the second driving screw is provided with a second driving device;

[0018] The second driving screw rod and the upper end of the guide column both pass through the second lifting block; the second driving screw rod is threadedly engaged with the second lifting block.

[0019] Furthermore, the demoulding device includes a limit frame; support legs are provided between the limit frame and the base; an electric push rod is provided below the limit frame;

[0020] The limit frame has an inner cavity; a push plate is provided in the inner cavity; a limit plate is provided above the push plate; a push rod is provided on the limit plate; a spring is sleeved on the push rod;

[0021] The forming base is located above the limit frame and is fixedly connected to the limit frame; the upper end of the push rod is inserted into the forming base and extends to the bottom surface of the forming cavity; the spring is located between the limit plate and the forming base; an electric push rod is provided below the limit frame to push the push plate up and down.

[0022] Furthermore, the mold core has an inner cavity; a central module is arranged in the inner cavity of the mold core; there is a gap between the outer surface of the central module and the inner cavity of the mold core; a third heating device is arranged in the gap; a fourth heating device is arranged at the lower end of the central module; and the upper end of the central module is fixedly connected to the upper end of the mold core.

[0023] Furthermore, the central module is a hollow structure and is made of heat-insulating material. The central module has an inner cavity, and a pressure valve penetrating to the bottom of the mold core is provided at the bottom of the inner cavity.

[0024] Furthermore, the connecting frame includes a first connecting head connected to the upper end of the mold core; a positioning block is provided above the first connecting head; a connecting column is provided between the first connecting head and the positioning block; a second connecting head is provided on the upper surface of the positioning block; and a second limiting structure is provided on both end faces of the positioning block.

[0025] Furthermore, the first positioning structure and the second positioning structure both adopt positioning posts; the first limiting structure and the second limiting structure both adopt limiting holes matching the positioning posts.

[0026] Furthermore, both ends of one side surface of the transverse moving block are provided with transverse guide posts; the transverse guide posts pass through the first lifting block.

[0027] Furthermore, the outer surface of the molding base and the outer surface of the outer mold frame are both provided with a heat insulation layer;

[0028] The first heating device, the second heating device, the third heating device and the fourth heating device all include heat conducting plates and heat exchange tubes; the heat exchange tubes pass through the heat conducting plates.

[0029] The beneficial effects of the utility model are as follows: the graphite sagger forming mold and forming process described in the utility model have the following advantages:

[0030] 1. The graphite sagger forming mold can achieve a variety of deformations, so it can be applied to a variety of forming processes of graphite sagger; and it is easy to operate;

[0031] 2. By setting up multiple heating devices in the graphite sagger forming mold, the molding material can be evenly heated during the graphite sagger forming process, reducing the impact of thermal stress on the graphite sagger forming;

[0032] 3. A demoulding device is provided at the bottom of the graphite crucible forming mold, which can realize automatic demoulding and is easy to operate;

[0033] 4. The graphite crucible forming mold described in the utility model can form the graphite powder and the binder into a single batch after mixing, which is convenient to operate and can reduce production costs, improve production efficiency and ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is an exploded schematic diagram of a graphite sagger forming mold in an embodiment of the present utility model;

[0035] Figure 2 This is a front view of a graphite sagger forming die in an embodiment of the present utility model;

[0036] Figure 3 It is a side view of the graphite sagger forming mold in the embodiment of the present utility model;

[0037] Figure 4 1. It is a top view of the graphite sagger forming mold in the embodiment of the present utility model;

[0038] Figure 5 This is a schematic diagram of the installation of a graphite sagger forming die on a press in an embodiment of the present utility model;

[0039] Figure 6 This is a structural diagram of the graphite sagger forming mold when the mold core of the mold frame is pulled out of the mold frame in the embodiment of the utility model;

[0040] Figure 7 It is a structural schematic diagram of the graphite sagger forming mold when the mold frame fixed mold core moves down to a specified position in the embodiment of the utility model;

[0041] Figure 8 This is a three-dimensional diagram of a graphite sagger forming mold in an embodiment of the present utility model;

[0042] Figure 9 yes Figure 4 AA cross-sectional view;

[0043] Figure 10 This is a three-dimensional diagram of the graphite sagger forming mold in the embodiment of the present utility model when the mold core is fixed to the lifting mold frame;

[0044] Figure 11 This is a structural diagram of the graphite sagger forming mold when the mold core is fixed to the lifting mold frame in the embodiment of the utility model;

[0045] Figure 12 This is a three-dimensional diagram of the middle mold frame of the graphite sagger forming mold in the embodiment of the present utility model when the lifting mold core is fixed;

[0046] Figure 13 This is a structural diagram of the middle mold frame of the graphite sagger forming mold in the embodiment of the present utility model when the lifting mold core is fixed;

[0047] Figure 14 This is a structural diagram of the graphite sagger forming mold in the embodiment of the present utility model when the fixed mold core of the middle mold frame moves to the lowermost end;

[0048] Figure 15 This is a schematic diagram of the demoulding structure of the graphite crucible forming mold in the embodiment of the utility model. Figure 1 ;

[0049] Figure 16 This is a schematic diagram of the demoulding structure of the graphite crucible forming mold in the embodiment of the utility model. Figure 2 ;

[0050] Figure 17 yes Figure 7 A partial enlarged view of middle B;

[0051] Figure 18 This is a three-dimensional diagram of a spring in an embodiment of the present utility model;

[0052] Figure 19 This is a three-dimensional diagram of the second heater in the embodiment of the present utility model;

[0053] Figure 20 This is a three-dimensional diagram of the third heater in the embodiment of the present utility model;

[0054] Figure 21 This is a three-dimensional diagram of the first heater in the embodiment of the present utility model;

[0055] Figure 1: 100-base, 110-guide column, 120-first driving screw, 121-first driving device, 130-second driving screw, 131-second driving device, 200-demolding device, 300-molding base, 310-molding cavity, 320-mounting groove, 330-mounting cavity, 340-first heating device; 400-first lifting block, 410-lateral telescopic device, 420-lateral moving block, 421-lateral guide column, 422-first positioning structure; 430-second lifting block, 440-second positioning structure, 500-outer film frame, 510-annular inner cavity, 520-first Second heating device, 530-annular sealing cover, 600-middle mold frame, 610-flange, 611-first limiting structure, 620-first annular bracket, 630-support column, 640-second annular bracket, 650-adjusting nut, 700-mold core, 710-third heating device, 720-center module, 721-fourth heating device, 800-connecting frame, 810-first connecting head, 820-positioning block, 821-second positioning structure, 830-connecting column, 840-second connecting head, 900-graphite sagger, 1000-press, 1100-lower working surface, 1200-upper working surface. DETAILED DESCRIPTION

[0056] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0057] like Figures 1 to 21 As shown, the graphite crucible forming mold of the present invention includes a base 100; a demoulding device 200 is provided above the base 100; a first lifting block 400 driven up and down by a first lifting device and a second lifting block 430 driven up and down by a second lifting device are provided on both sides of the demoulding device 200; the second lifting block 430 is located below the first lifting block 400;

[0058] The main function of the base 100 is to provide support and facilitate connection and installation with the lower working surface of the press. The base 100 can be made of cast iron, and a connecting structure can be provided on the base 100 to facilitate connection and installation with the lower working surface of the press.

[0059] The main function of the demoulding device 200 is to realize demoulding; the demoulding device 200 can be implemented in various ways, such as a push rod demoulding device.

[0060] A molding base 300 is provided above the demoulding device 200; an outer mold frame 500 is provided above the molding base 300; a middle mold frame 600 is provided inside the outer mold frame 500; a mold core 700 is provided inside the middle mold frame 600;

[0061] The main function of the molding base 300 is to provide a molding cavity for the bottom of the graphite saggar; specifically, the molding base 300 has a molding cavity 310 and a mounting groove 320 that matches the outer mold frame 500; a first heating device 340 for heating the molding cavity 310 is provided in the molding base 300; the main function of the first heating device 340 is to heat the bottom of the molding cavity 310.

[0062] The outer mold frame 500 primarily functions to form the mold cavity of the graphite sagger's sidewalls. A second heating device 520 for heating the inner wall of the outer mold frame 500 is disposed within the inner wall of the outer mold frame 500. The heating device can be disposed within the inner wall of the outer mold frame 500 in a variety of ways, such as an embedded heating device. To facilitate maintenance, replacement, and installation of the heating device, the inner wall of the outer mold frame 500 preferably includes an annular inner cavity 510. Within this annular inner cavity 510 is disposed a second heating device 520 for heating the inner wall of the outer mold frame 500. An annular sealing cap 530 is disposed at the upper end of the outer mold frame 500 to seal the annular inner cavity 510. The placement of the second heating device 520 within the inner wall facilitates uniform heating of the inner wall of the annular inner cavity 510.

[0063] The main function of the middle mold frame 600 is to facilitate the control of the height of the graphite sagger; specifically, the outer surface of the middle mold frame 600 matches the inner cavity of the outer mold frame 500; a flange 610 is provided at the upper end of the middle mold frame 600; a first limiting structure 611 is provided on two opposite side surfaces of the flange 610; a first annular bracket 620 is provided above the flange 610; a second annular bracket 640 is provided below the flange 610; a support column 630 is provided between the first annular bracket 620 and the second annular bracket 640; the support column 630 passes through the flange 610; adjusting nuts 650 are provided on the upper and lower surfaces of the flange 610; the adjusting nuts 650 are threadedly engaged with the support columns 630;

[0064] The distance between the second annular bracket 640 and the flange 610 can be adjusted by adjusting the nut 650, thereby adjusting the height of the first annular bracket 620 relative to the flange 610, thereby facilitating adjustment of the initial position height of the middle mold frame 600 during the molding process.

[0065] The main function of the mold core 700 is to achieve the finalization of the inner cavity of the graphite crucible; specifically, the outer surface of the mold core 700 matches the inner cavity of the middle mold frame 600; a connecting frame 800 is provided at the upper end of the mold core 700;

[0066] The main function of the connecting frame 800 is to connect the mold core 700 with the upper working surface 1200 of the press 1000. Specifically, the lower end of the connecting frame 800 is connected to the mold core 700. The two opposite sides of the upper end of the connecting frame 800 are both provided with a second limiting structure 821.

[0067] In order to facilitate the positioning of the mold core 700 or the middle mold frame 600, specifically, the first lifting block 400 is provided with a first positioning structure 422 that can be laterally extended;

[0068] The lateral extension and contraction of the first positioning structure 422 can be achieved by installing a lateral extension device between the first lifting block 400 and the first positioning structure 422. To facilitate control and ensure structural stability, the first lifting block 400 is provided with a lateral movement block 420; a lateral extension device 410 is provided between the first lifting block 400 and the lateral movement block 420; the first positioning structure 422 is provided on one side of the lateral movement block 420; and the first limiting structure 611 and the second limiting structure 821 are both matched with the positioning structure 422.

[0069] The first limiting structure 611 or the second limiting structure 821 is connected to the first positioning structure 422, and the first lifting device is activated to move the first lifting block 400 up and down, thereby adjusting the upper and lower positions of the middle mold frame 600 or the mold core 700.

[0070] The second lifting block 430 is provided with a second positioning structure 440 that can be laterally extended and retracted; the first limiting structure 611 and the second limiting structure 821 are both matched with the second positioning structure 422 .

[0071] The first limiting structure 611 is connected to the second positioning structure 440 ; and the second lifting device is activated to move the second lifting block 430 up and down, thereby achieving height adjustment and fixation of the middle mold frame 600 .

[0072] The first lifting device and the second lifting device can be implemented in various ways, such as a hydraulic cylinder or a pneumatic cylinder. In a feasible embodiment, the first lifting device includes a first driving screw 120; guide posts 110 are provided on both sides of the first driving screw 120; a first driving device 121 is provided at the lower end of the first driving screw 120;

[0073] The first drive screw 120 and the upper end of the guide post 110 both pass through the first lifting block 400; the first drive screw 120 is threadedly engaged with the first lifting block 400. The first drive device 121 can be a motor, and in this embodiment, the first drive device 121 is an electric motor. The first drive device 121 drives the first drive screw 120 to rotate, thereby causing the first lifting block 400 to move up and down, thereby achieving the lifting of the first lifting block 400.

[0074] The second lifting device includes a second driving screw rod 130; a second driving device 131 is provided at the lower end of the second driving screw rod 130;

[0075] The second driving screw rod 130 and the upper end of the guide column 110 both pass through the second lifting block 430 ; the second driving screw rod 130 is threadedly engaged with the second lifting block 430 .

[0076] The second driving device 131 can be a motor. In this embodiment, the second driving device 131 is an electric motor. The second driving device 131 drives the second driving screw 130 to rotate, thereby causing the second lifting block 430 to move up and down, thereby achieving the lifting of the second lifting block 430.

[0077] During application, the graphite sagger forming mold described in the utility model can realize the following graphite sagger forming process, which specifically includes the following steps:

[0078] 1. Install the graphite sagger forming mold on the lower working surface 1100 of the press 1000, which can be a hot press or a hydraulic press; adjust the distance between the second annular bracket 640 and the flange 610 by adjusting the nut; thereby adjust the height of the initial position of the middle mold frame 600; make the distance between the lower end of the middle mold frame 600 and the bottom of the forming cavity 310 be the set value; and start the second lifting device to raise the second lifting block 430 to the corresponding height, so that the second positioning structure 440 is connected to the first limiting structure 611 on the middle mold frame 600; thereby fixing the position of the middle mold frame 600; connect the upper end of the connecting frame 800 on the mold core 700 to the upper working surface 1200 of the press 1000; start the press to pull the mold core 700 out of the middle mold frame 600; the initial position of the middle mold frame 600 is as shown in FIG. Figure 6 shown.

[0079] 2. Add molding powder into the mold; the molding powder includes adhesive and graphite powder. Start the upper working surface 1200 of the press 1000 to move downward, driving the mold core 700 downward to squeeze the molding powder; then move the upper working surface of the press upward to remove the mold core 700 from the middle mold frame 600; add molding powder; repeat several times until the distance between the lower end of the mold core 700 and the molding cavity 310 is the set thickness of the bottom of the graphite sagger to form the bottom surface of the sagger; Figure 7 The molding principle of the molding powder is as follows: the binder in the molding powder is heated by a heating device to a molten state, which wraps the graphite powder. Under the action of the extrusion force, it fully flows and solidifies into a shape; the binder solidifies after a short period of thermoplastic deformation.

[0080] 3. Start the first lifting device to raise and lower the first lifting block 400 to a position aligned with the second limiting structure 821 on the connecting frame 800. Then, extend and retract the first positioning structure 422 to connect the first positioning structure 422 with the second limiting structure 821. Brake the first lifting device to secure the mold core 700. Disconnect the upper end of the connecting frame 800 from the upper working surface of the press.

[0081] At the same time, by contracting the second positioning structure 440, the second positioning structure 440 is disconnected from the first limiting structure 611 on the middle mold frame 600; Figure 8 、 9 As shown. And connect the first annular bracket 620 to the upper working surface of the press; drive the first annular bracket 620 and the middle mold frame 600 to move to the position as shown. Figure 10 、 11 The position shown is then used to add molding powder into the mold; the molding powder includes a binder and graphite powder.

[0082] 4. Start the press, and use the press to drive the middle mold frame 600 to move downward along the mold cavity until it contacts the powder; at this time, start the first heating device 340, the second heating device 520, the third heating device 710 and the fourth heating device 721; the upper working surface of the press moves downward, driving the middle mold frame 600 to apply pressure to the powder; after the powder is compacted, the press moves upward, lifts the middle mold frame 600 upward, continues to add powder to the mold cavity, and then allows the upper working surface of the press to drive the middle mold frame 600 to move downward, and repeats multiple times to form the side wall of the sagger.

[0083] 5. Activate the transverse expansion and contraction device 410 to disconnect the first positioning structure 422 from the second limiting structure 821; connect the upper end of the connecting frame 800 to the upper working surface of the press; activate the press to remove the mold core 700 and the middle mold frame 600 from the outer mold frame 500;

[0084] 6. Start the demoulding device and demould the graphite sagger through the demoulding device; Figure 15 、 Figure 16 .

[0085] In order to facilitate the demoulding of the graphite sagger, in a feasible embodiment, the demoulding device 200 includes a limit frame 210; a support leg is provided between the limit frame 210 and the base 100; the limit frame 210 has an inner cavity; a push plate 230 is provided in the inner cavity; a limit plate 240 is provided above the push plate 230; a push rod 260 is provided on the limit plate 240; a spring 250 is provided on the push rod 260; the molding base 300 is located above the limit frame 210 and is fixedly connected to the limit frame 210; the upper end of the push rod 260 is inserted into The molding base 300 is provided and extends to the bottom surface of the molding cavity 310; the spring 250 is located between the limit plate 240 and the molding base 300; an electric push rod 220 is provided under the limit frame 210 to push the push plate 230 to move up and down; specifically, one end of the push rod 260 is a T-shaped head, and a through hole matching the push rod 260 is provided on the limit plate 240, and a limiting groove matching the T-shaped head is provided at one end of the through hole; one end of the push rod 260 passes through the through hole on the limit plate 240, and the T-shaped head of the push rod 260 is embedded in the limiting groove on the limit plate 240.

[0086] During the demoulding process, the electric push rod 220 is started to push the push plate 230 ; the push plate 230 drives the limit plate 240 and the ejector 260 to move; and the ejector 260 ejects the graphite saggar from the molding cavity 310 .

[0087] In order to ensure uniform heating of the molding material during the graphite crucible molding process, in a feasible embodiment, further, the mold core 700 has an inner cavity; a central module 720 is provided in the inner cavity of the mold core 700; a gap is provided between the outer surface of the central module 720 and the inner cavity of the mold core 700; a third heating device 710 is provided in the gap; a fourth heating device 721 is provided at the lower end of the central module 720; and the upper end of the central module 720 is fixedly connected to the upper end of the mold core 700.

[0088] In order to reduce the weight of the mold core 700, further, in a feasible embodiment, the central module 720 is a hollow structure and is made of heat-insulating material. In order to facilitate the addition of molding powder, there is no need to add a specific amount of molding powder; the central module 720 has an inner cavity, and a pressure valve 730 is provided at the bottom of the inner cavity, which extends through the bottom of the mold core 700. When the molding powder is subjected to a large extrusion force and the molding powder fills the entire molding cavity, the pressure on the molding powder in the molding cavity exceeds the critical value of the pressure valve, and the pressure valve opens to discharge the excess molding powder. The pressure valve 730 adopts a pressure relief valve, which opens when the pressure reaches a certain value and closes when it falls below a certain value.

[0089] In order to facilitate the connection, ensure the strength of the connecting frame 800, and facilitate the production, in a feasible embodiment, the connecting frame 800 includes a first connecting head 810 connected to the upper end of the mold core 700; a positioning block 820 is provided above the first connecting head 810; a connecting column 830 is provided between the first connecting head 810 and the positioning block 820; a second connecting head 840 is provided on the upper surface of the positioning block 820; and a second limiting structure 821 is provided on both end faces of the positioning block 820.

[0090] In order to simplify the structure and facilitate the connection between the positioning structure 422 and the limiting structure, in a feasible embodiment, the first positioning structure 422 and the second positioning structure 440 both use positioning columns; the first limiting structure 611 and the second limiting structure 821 both use limiting holes matching the positioning columns.

[0091] In order to ensure the stability of the structure, further, in a feasible embodiment, both ends of one side of the lateral moving block 420 are provided with lateral guide pillars 421 ; the lateral guide pillars 421 pass through the first lifting block 400 .

[0092] In order to improve heating efficiency and reduce energy consumption, in a feasible embodiment, the outer surface of the molding base 300 and the outer surface of the outer mold frame 500 are both provided with a heat insulation layer;

[0093] The first heating device 340 , the second heating device 520 , the third heating device 710 and the fourth heating device 721 all include heat conducting plates and heat exchange tubes; the heat exchange tubes pass through the heat conducting plates.

[0094] The utility model also provides a graphite sagger forming process, which uses the graphite sagger forming mold described in the utility model; the process comprises the following steps:

[0095] 1. Install the graphite sagger forming mold on the lower working surface 1100 of the press 1000, which can be a hot press or a hydraulic press. Move the first lifting block 400 to a specified height using a first lifting device. Align the lateral moving block 420 with the first limiting structure 611 on the middle mold frame 600. Connect the first positioning structure 422 on the lateral moving block 420 to the first limiting structure 611.

[0096] The first lifting device is activated to move the first lifting block 400 upward, thereby moving the middle mold frame 600 upward; the middle mold frame 600 moves to a specified height, and the lifting device is braked;

[0097] Alternatively, the second lifting block 430 is moved to a specified height by a second lifting device so that the second positioning structure 440 is aligned with the first limiting structure 611 on the middle mold frame 600, so that the second positioning structure 440 is connected to the first limiting structure 611;

[0098] The second lifting device is activated to move the second lifting block 430 upward, thereby moving the middle mold frame 600 upward; the middle mold frame 600 moves to a specified height, and the lifting device is braked;

[0099] 2. Connect the connecting frame 800 at the upper end of the mold core 700 to the upper working surface 1200 of the press 1000; use the press to move the mold core 700 upward until the mold core 700 is pulled out of the middle mold frame 600;

[0100] 3. Add a certain amount of molding powder from the upper end of the middle mold frame 600 into the mold cavity formed by the outer mold frame 500 and the molding base 300;

[0101] 4. The mold core 700 is moved downward by a press until the lower end of the mold core 700 contacts the molding powder in the mold cavity; the first heating device 340, the second heating device 520, and the fourth heating device 721 are activated; and the adhesive in the molding powder in the mold cavity is melted;

[0102] 5. The mold core 700 is moved downward by the press until the distance between the lower end of the mold core 700 and the molding cavity 310 is the set thickness of the bottom of the graphite sagger. The mold core 700, the middle mold frame 600, the molding base 300, and the outer mold frame 500 form a molding cavity. At this time, the mold core 700 applies pressure to the molding powder in the mold cavity, squeezing the molding powder. Since the binder in the molding powder reaches a molten state, the molding powder flows under the action of the squeezing force and fills the entire molding cavity. The third heating device 710 is started.

[0103] 6. After the graphite sagger forming mold is left to stand for a set time until the graphite sagger is thermoset and formed, the first heating device 340, the second heating device 520, the third heating device 710 and the fourth heating device 721 are turned off;

[0104] 7. Activate the transverse expansion and contraction device 410 to disconnect the first positioning structure 422 from the first limiting structure 611; connect the first annular support 620 to the upper working surface of the press; activate the press to remove the mold core 700 and the middle mold frame 600 from the outer mold frame 500;

[0105] Alternatively, the second positioning structure 440 is disconnected from the first limiting structure 611; and the first annular bracket 620 is connected to the upper working surface of the press; the press is started, and the mold core 700 and the middle mold frame 600 are pulled out of the outer mold frame 500 by the press;

[0106] 8. Start the demoulding device and demould the graphite sagger through the demoulding device; Figure 15 、 Figure 16 .

Claims

1. Graphite sagger forming mold, characterized by: The invention comprises a base (100); a demoulding device (200) is arranged above the base (100); a first lifting block (400) driven to move up and down by a first lifting device and a second lifting block (430) driven to move up and down by a second lifting device are arranged on both sides of the demoulding device (200); the second lifting block (430) is located below the first lifting block (400); A molding base (300) is provided above the demoulding device (200); an outer mold frame (500) is provided above the molding base (300); a middle mold frame (600) is provided inside the outer mold frame (500); a mold core (700) is provided inside the middle mold frame (600); The molding base (300) has a molding cavity (310) and a mounting groove (320) matching the outer mold frame (500); a first heating device (340) for heating the molding cavity (310) is provided in the molding base (300); A second heating device (520) for heating the inner wall of the outer mold frame (500) is provided inside the inner wall of the outer mold frame (500); The outer surface of the middle mold frame (600) matches the inner cavity of the outer mold frame (500); a flange (610) is provided at the upper end of the middle mold frame (600); a first limiting structure (611) is provided on both opposite side surfaces of the flange (610); a first annular bracket (620) is provided above the flange (610); a second annular bracket (640) is provided below the flange (610); a support column (630) is provided between the first annular bracket (620) and the second annular bracket (640); the support column (630) passes through the flange (610); adjusting nuts (650) are provided on the upper and lower surfaces of the flange (610); the adjusting nuts (650) are threadedly engaged with the support column (630); The outer surface of the mold core (700) matches the inner cavity of the middle mold frame (600); a connecting frame (800) is provided at the upper end of the mold core (700); the lower end of the connecting frame (800) is connected to the mold core (700); and two opposite side surfaces of the upper end of the connecting frame (800) are both provided with a second limiting structure (821); The first lifting block (400) is provided with a first positioning structure (422) capable of transverse extension and contraction; the first limiting structure (611) and the second limiting structure (821) are both matched with the first positioning structure (422); The second lifting block (430) is provided with a second positioning structure (440) that can be laterally extended and retracted; the first limiting structure (611) and the second limiting structure (821) are both matched with the second positioning structure (440).

2. The graphite sagger forming mold according to claim 1, characterized in that: The first lifting device comprises a first driving screw rod (120); guide columns (110) are provided on both sides of the first driving screw rod (120); a first driving device (121) is provided at the lower end of the first driving screw rod (120); The first driving screw rod (120) and the upper end of the guide column (110) both pass through the first lifting block (400); the first driving screw rod (120) and the first lifting block (400) are threadedly engaged; The second lifting device comprises a second driving screw rod (130); a second driving device (131) is provided at the lower end of the second driving screw rod (130); The second driving screw rod (130) and the upper end of the guide column (110) both pass through the second lifting block (430); the second driving screw rod (130) and the second lifting block (430) are threadedly matched.

3. The graphite sagger forming mold according to claim 1, characterized in that: The demoulding device (200) comprises a limiting frame (210); a supporting leg is provided between the limiting frame (210) and the base (100); The limiting frame (210) has an inner cavity; a push plate (230) is provided in the inner cavity; a limiting plate (240) is provided above the push plate (230); a push rod (260) is provided on the limiting plate (240); a spring (250) is sleeved on the push rod (260); The molding base (300) is located above the limiting frame (210) and is fixedly connected to the limiting frame (210); the upper end of the push rod (260) is inserted into the molding base (300) and extends to the bottom surface of the molding cavity (310); the spring (250) is located between the limiting plate (240) and the molding base (300); and an electric push rod (220) is provided below the limiting frame (210) to push the push plate (230) to move up and down.

4. The graphite sagger forming mold according to claim 1, wherein: The inner wall of the outer mold frame (500) has an annular inner cavity (510); a second heating device (520) for heating the inner wall of the outer mold frame (500) is provided in the annular inner cavity (510); and an annular sealing cover (530) for sealing the annular inner cavity (510) is provided at the upper end of the outer mold frame (500).

5. The graphite sagger forming mold according to claim 1, wherein: A transverse moving block (420) is provided on the first lifting block (400); a transverse telescopic device (410) is provided between the first lifting block (400) and the transverse moving block (420); a first positioning structure (422) is provided on one side surface of the transverse moving block (420); transverse guide pillars (421) are provided at both ends of one side surface of the transverse moving block (420); and the transverse guide pillars (421) pass through the first lifting block (400).

6. The graphite sagger forming mold according to claim 1, wherein: The mold core (700) has an inner cavity; a central module (720) is arranged in the inner cavity of the mold core (700); a gap is provided between the outer surface of the central module (720) and the inner cavity of the mold core (700); a third heating device (710) is arranged in the gap; a fourth heating device (721) is arranged at the lower end of the central module (720); and the upper end of the central module (720) is fixedly connected to the upper end of the mold core (700).

7. The graphite sagger forming mold according to claim 6, characterized in that: The central module (720) is a hollow structure and is made of heat-insulating material. The central module (720) has an inner cavity, and a pressure valve (730) is provided at the bottom of the inner cavity and extends through the bottom of the mold core (700).

8. The graphite sagger forming mold according to claim 1, wherein: The connecting frame (800) comprises a first connecting head (810) connected to the upper end of the mold core (700); a positioning block (820) is provided above the first connecting head (810); a connecting column (830) is provided between the first connecting head (810) and the positioning block (820); a second connecting head (840) is provided on the upper surface of the positioning block (820); and second limiting structures (821) are provided on both end surfaces of the positioning block (820).

9. The graphite sagger forming mold according to claim 1, characterized in that: The positioning structure (422) adopts a positioning column; the first limiting structure (611) and the second limiting structure (821) both adopt limiting holes that match the positioning column.

10. The graphite sagger forming mold according to claim 6, characterized in that: The outer surface of the molding base (300) and the outer surface of the outer mold frame (500) are both provided with a heat insulation layer; The first heating device (340), the second heating device (520), the third heating device (710) and the fourth heating device (721) all include heat conducting plates and heat exchange tubes; the heat exchange tubes pass through the heat conducting plates.

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