Die casting method, mold and die casting device

Abstract

The present application provides a die-casting method, comprising: providing a compression molding device, comprising a mold, a microwave generator and a waveguide, the mold comprising a wall body, an upper pressure head, a lower pressure head and a seal, the wall body encloses a mold cavity, and the wall body comprises a microwave reflecting material, the seal comprises a microwave penetrating material, the upper pressure head and the lower pressure head are arranged opposite to each other on the wall body, at least one mounting hole passes through the wall body, and the seal seals the mounting hole toward the opening of the mold cavity, and the waveguide connects the mounting hole and the microwave generator; placing powder in the mold cavity; turning on the microwave generator to heat the powder in the mold cavity to a preset temperature by microwaves and then turning it off; driving the upper pressure head and the lower pressure head to press the heated powder; turning on the microwave generator to heat the pressed powder to another preset temperature and then turning it off; opening the mold after cooling down to take out the molded product. The above method can shorten the heating time and improve the situation where the powder is heated unevenly. The present application also provides the above mold and the above compression molding device.

Description

Technical Field

[0001] The present application relates to a process processing equipment and method, and in particular to a die-casting method, and also to a die for die-casting and a compression molding device using the die. Background Art

[0002] When composite powder is pressed into shape, the process is relatively complicated, time-consuming and has high losses due to the limitations of the mold structure. Summary of the invention

[0003] The first aspect of the present application provides a mold, the mold comprising a wall, an upper pressure head, a lower pressure head and at least one sealing member. The wall body encloses a mold cavity, and the wall body comprises a microwave reflecting material. The upper pressure head and the lower pressure head are arranged opposite to the wall body. Each of the sealing members comprises a microwave penetrating material. At least one mounting hole passes through the wall body, and each of the sealing members seals an opening of the mounting hole toward the mold cavity.

[0004] The mold of the present application is used to press the material placed in the mold cavity by the cooperation of the upper and lower pressure heads. The mounting hole is used to install a waveguide tube to introduce microwaves to quickly heat the material before or after pressing. The sealing member seals the opening of the mounting hole toward the mold cavity, which helps to prevent the material from entering the waveguide tube when the upper and lower pressure heads press the material. At the same time, the microwaves in the waveguide tube can also pass through the sealing member and be introduced into the mold cavity to heat the material. The wall body includes microwave reflecting material, which helps to reflect the microwaves entering the mold cavity, thereby facilitating uniform heating of the material.

[0005] In combination with the first aspect, in some embodiments, each of the seals is embedded in one of the mounting holes, which is conducive to building a relatively sealed pressing environment, and is also conducive to the abutment between the waveguide and the seal when the waveguide is subsequently connected, thereby facilitating the introduction of the microwaves in the waveguide into the mold cavity.

[0006] In combination with the first aspect, in some embodiments, the number of the seal is one, and the seal covers the surface of the wall facing the mold cavity, which helps to prevent the material from entering the gap between the wall and the seal, especially when the material is powder.

[0007] In combination with the first aspect, in some embodiments, the seal comprises a first sealing portion and at least one second sealing portion, the first sealing portion covers the surface of the wall body facing the mold cavity, each of the second sealing portions is convexly arranged on the surface of the first sealing portion facing the wall body, and each of the second sealing portions is embedded in one of the mounting holes. The first sealing portion covers the surface of the wall body facing the mold cavity to prevent the material from entering the gap between the wall body and the first sealing portion, and the second sealing portion can also increase the bonding force between the seal and the wall body, and is also beneficial to the abutment between the waveguide and the seal when the waveguide is subsequently connected, thereby facilitating the introduction of microwaves in the waveguide into the mold cavity.

[0008] In combination with the first aspect, in some embodiments, at least one of the upper pressure head and the lower pressure head includes a microwave reflecting material, which is conducive to forming a microwave heating resonant cavity, thereby facilitating rapid and uniform heating of the material after the microwave is introduced into the mold cavity.

[0009] In combination with the first aspect, in some embodiments, the microwave reflecting material is steel, which can reflect microwaves and is beneficial to improving the structural strength of the mold; each of the sealing components is a ceramic component, which is beneficial to the penetration of microwaves.

[0010] In combination with the first aspect, in some embodiments, the pressure head is rotatably connected to the wall body, that is, the pressure head supporting the pressed material can rotate compared to the wall body. When the mounting hole is connected to the waveguide tube to introduce microwaves into the mold cavity, in addition to reflecting the microwaves through the microwave reflecting material, the rotation of the pressure head compared to the wall body is further beneficial to heating the material from various angles, thereby facilitating uniform and rapid heating of the material.

[0011] In combination with the first aspect, in some embodiments, the mold also includes at least one waveguide tube, one end of which is inserted into one of the mounting holes and abuts against the seal, and the waveguide tube is used to connect to a microwave generator and conduct the microwaves generated by the microwave generator. The abutment of the waveguide tube and the seal facilitates the microwaves in the waveguide tube to penetrate the seal and be introduced into the mold cavity.

[0012] In combination with the first aspect, in some embodiments, the mold further comprises an upper template and a lower template that are arranged relatively to each other, one end of the upper press head is located outside the mold cavity and connected to the upper template, and one end of the lower press head is located outside the mold cavity and connected to the lower template. The upper press head and the lower press head can be connected to a driving member through the upper template and the lower template respectively. Due to the presence of the upper template and the lower template, the force applied by the driving member to the upper press head and the lower press head is more evenly distributed, so that the pressure distribution is more even when the upper press head and the lower press head press the material.

[0013] The second aspect of the present application provides a compression molding device, which includes a first driving member, the mold as described above, and at least one waveguide. The driving shaft of the first driving member is connected to the upper pressure head or the lower pressure head. One end of each of the waveguides is inserted into one of the mounting holes and abuts against the sealing member.

[0014] The compression molding device of the present application is a material placed in a mold cavity by means of an upper pressure head and a lower pressure head. The waveguide is used to connect a microwave generator and conduct the microwaves generated by the microwave generator. The sealing member seals the opening of the mounting hole toward the mold cavity, which helps to prevent the material from entering the waveguide when the upper pressure head and the lower pressure head press the material together. At the same time, the microwaves in the waveguide can also be introduced into the mold cavity through the seal to quickly heat the material. The wall body including microwave reflecting material is conducive to reflecting the microwaves entering the mold cavity, thereby facilitating uniform heating of the material.

[0015] In combination with the second aspect, in some embodiments, the driving shaft of the first driving member is connected to the upper pressure head and drives the upper pressure head to move toward the lower pressure head, and the molding device also includes a second driving member, and the driving shaft of the second driving member is connected to the lower pressure head and drives the lower pressure head to move toward the upper pressure head.

[0016] In combination with the second aspect, in some embodiments, an upper pressing plate is provided between the driving shaft of the first driving member and the upper pressing head, and a lower pressing plate is provided between the driving shaft of the second driving member and the lower pressing head. The upper pressing head and the lower pressing head are subsequently connected to the driving member through the upper pressing plate and the lower pressing plate, respectively. Due to the presence of the upper pressing plate and the lower pressing plate, the force applied by the driving member to the upper pressing head and the lower pressing head is more evenly distributed, so that the pressure distribution is more even when the upper pressing head and the lower pressing head press the material.

[0017] In combination with the second aspect, in some embodiments, the compression molding device further includes at least one microwave generator, each of the waveguide tubes is connected to a microwave generator, and the microwave generator generates microwaves and introduces them into the waveguide tube for conduction through the waveguide tube.

[0018] The third aspect of the present application provides a die-casting method, comprising the following steps: placing powder in a mold cavity of the molding device as described above; turning on the microwave generator to heat the powder in the mold cavity to a preset temperature using microwaves and then turning off the microwave generator; driving the upper pressure head and the lower pressure head to press the heated powder; turning on the microwave generator to heat the pressed powder to another preset temperature and then turning off the microwave generator; and opening the mold after cooling down to take out the molded product.

[0019] Firstly, the die-casting method realizes heating and pressing in the same mold cavity, the process is relatively simple, no waste is generated, and the cost is reduced. Secondly, the process realizes microwave heating through the seal and the wall with microwave reflective material, which improves the heating efficiency and heating uniformity.

[0020] In combination with the third aspect, in some embodiments, when the microwave generator is turned on for heating, the relative rotation between the lower pressure head and the wall is controlled to further facilitate heating of the powder from various angles, thereby facilitating uniform and rapid heating of the powder.

[0021] In combination with the third aspect, in some embodiments, the powder includes at least one of inorganic non-metallic particles and polymer material particles.

[0022] In combination with the third aspect, in some embodiments, the powder further includes metal particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a mold according to an embodiment of the present application.

[0024] Figure 2 The mold edge of an embodiment of the present application Figure 1 Schematic diagram of the cross section along the II-II direction.

[0025] Figure 3 This is a schematic diagram of a mold in use according to an embodiment of the present application.

[0026] Figure 4 It is a cross-sectional schematic diagram of a mold according to an embodiment of the present application.

[0027] Figure 5 It is a cross-sectional schematic diagram of a mold according to an embodiment of the present application.

[0028] Figure 6 It is a cross-sectional schematic diagram of a mold according to an embodiment of the present application.

[0029] Figure 7 It is a cross-sectional schematic diagram of a mold according to an embodiment of the present application.

[0030] Figure 8 It is a cross-sectional schematic diagram of a compression molding device according to an embodiment of the present application.

[0031] Main component symbols

[0032] Mold 100

[0033] Wall 101

[0034] Upper pressure head 20

[0035] Down pressure head 30

[0036] Seal 40

[0037] Cavity 103

[0038] Mounting hole 105

[0039] Opening 106

[0040] Materials 200

[0041] Waveguide 60

[0042] Upper mold 11

[0043] Lower die 13

[0044] Top wall 10a

[0045] Bottom wall 10b

[0046] Side wall 10c

[0047] Upper template 51

[0048] Lower template 53

[0049] Compression molding device 300

[0050] The first driving member 81

[0051] Second driving member 83

[0052] Upper pressure plate 55

[0053] Lower pressure plate 57

[0054] Rack 70

[0055] Microwave generator 90

[0056] First sealing portion 41

[0057] Second sealing portion 43 DETAILED DESCRIPTION

[0058] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0059] At present, the existing composite powder is pressed and molded by adopting a transfer mold process, that is, the composite powder needs to be heated and pre-pressed to form a cake in the material groove of the mold to heat and melt, so that the cake has a certain fluidity, and then the material with fluidity is pressed into the mold cavity of the mold through the flow channel connecting the material groove and the mold cavity in the mold to form. Among them, the composite powder usually contains at least one of inorganic non-metallic particles and polymer material particles, and contains metal particles. For example, a composite powder mixed with 90% iron oxide particles and 10% epoxy resin particles by weight is first heated and pre-pressed into a cake without viscosity and fluidity, and the coil winding is placed in the mold cavity, and then the cake is placed in the material groove of the mold. After heating the cake to make it have a certain fluidity, the press is started to press the material with fluidity into the mold cavity through the flow channel to form an inductor. However, the above method is complex in process and the design of the mold is also relatively complex. In addition, due to the limitations of the structure and material of the existing mold, the material to be pressed in the mold can only be heated by conduction heating, which results in a long heating time and uneven heating of the material to be pressed. In addition, a large amount of material residue will be left in the flow channel of the mold, resulting in waste and increasing the cost of the powder. Therefore, the existing mold and process need to be improved.

[0060] The present application provides a mold with a simple structure, which can achieve heating and pressing in the same mold cavity, and can heat the material in the mold by microwaves, thereby shortening the heating time when heating the material in the mold cavity of the mold and improving the uneven heating of the material.

[0061] See also Figure 1 , the mold 100 may be substantially in the shape of a rectangular parallelepiped. Figure 2 The mold 100 includes a wall 101, an upper pressing head 20, a lower pressing head 30 and at least one sealing member 40. The wall 101 encloses a mold cavity 103, and the wall 101 includes a microwave reflecting material. The upper pressing head 20 and the lower pressing head 30 are arranged on the wall 101 opposite to each other. At least one mounting hole 105 passes through the wall 101 and communicates with the mold cavity 103. Each of the sealing members 40 seals an opening 106 of the mounting hole 105 toward the mold cavity 103.

[0062] See also Figure 3The mold 100 cooperates with the upper press head 20 and the lower press head 30 to press the material 200 placed in the mold cavity 103. The mounting hole 105 is used to install the waveguide 60 to introduce microwaves to quickly heat the material 200 before or after pressing. The sealing member 40 seals the opening 106 of the mounting hole 105 toward the mold cavity 103, which is beneficial to prevent the material 200 from entering the waveguide 60 when the upper press head 20 and the lower press head 30 press the material 200. At the same time, the microwaves in the waveguide 60 can also pass through the sealing member 40 and be introduced into the mold cavity 103 to heat the material 200. The wall 101 includes a microwave reflecting material, which is beneficial to reflecting the microwaves entering the mold cavity 103, thereby facilitating uniform heating of the material 200.

[0063] In some embodiments, the waveguide 60 may also be a part of the mold 100 .

[0064] In some embodiments, the shape of the mold 100 is not limited to the above-mentioned rectangular parallelepiped shape, and can be any other regular or irregular shape, for example, it can be but not limited to a hexagonal prism shape, a cylindrical shape, etc.

[0065] The wall 101 may be made of, but is not limited to, steel material. The steel material can reflect microwaves while providing sufficient structural strength for the mold 100 .

[0066] See also Figure 4 The wall 101 is formed by the cooperation of the upper mold 11 and the lower mold 13. For example, the upper mold 11 can be partially embedded in the lower mold 13, and the mold cavity 103 is located between the upper mold 11 and the lower mold 13. For another example, refer to Figure 2 and Figure 3 , one end of the upper die 11 can also be butted with one end of the lower die 13 to form a cuboid. In the present application, the structure and matching relationship of the upper die 11 and the lower die 13 are not limited, and the shape is not limited, as long as the upper die 11 and the lower die 13 cooperate to form the die cavity 103. The upper press head 20 is provided on the upper die 11, and the lower press head 30 is provided on the lower die 13.

[0067] See also Figure 2 and Figure 3 , the mold cavity 103 may be roughly in the shape of a cuboid. The wall body 101 may include a top wall 10a, a bottom wall 10b, and a side wall 10c. The top wall 10a is opposite to the bottom wall 10b, and the side wall 10c connects the top wall 10a and the bottom wall 10b to enclose the mold cavity 103. In some embodiments, the shape of the mold cavity 103 can be designed and adjusted as needed.

[0068] The upper pressure head 20 may be arranged on the top wall 10a. Specifically, one end of the upper pressure head 20 is located in the mold cavity 103, and the other end passes through the top wall 10a and is located outside the mold cavity 103. The upper pressure head 20 and the top wall 10a may be fixed, that is, the upper pressure head 20 and the top wall 10a cannot move relative to each other, or they may be rotatably connected. When the upper pressure head 20 and the top wall 10a are rotatably connected, the rotatable angle between the upper pressure head 20 and the top wall 10a may be any value. In some embodiments, the rotatable angle between the upper pressure head 20 and the top wall 10a may be 180° or more.

[0069] The upper pressure head 20 may include a microwave reflecting material, which can reflect microwaves after entering the mold cavity 103, thereby facilitating rapid and uniform heating of the material 200. Specifically, the upper pressure head 20 may be made of, but not limited to, steel.

[0070] The lower pressure head 30 may be disposed on the bottom wall 10b and opposite to the upper pressure head 20. Specifically, one end of the lower pressure head 30 is located in the mold cavity 103, and the other end passes through the bottom wall 10b and is located outside the mold cavity 103. The lower pressure head 30 and the bottom wall 10b may be fixed or rotatably connected. When the lower pressure head 30 and the bottom wall 10b are rotatably connected, the lower pressure head 30 of the supporting material 200 can rotate relative to the wall body 101, that is, the outlet of the waveguide 60 can rotate around the supporting material 200, which is conducive to further heating the material 200 from various angles, thereby facilitating uniform and rapid heating of the material 200. Among them, the rotatable angle between the lower pressure head 30 and the bottom wall 10b can be any value. In some embodiments, the rotatable angle between the lower pressure head 30 and the bottom wall 10 b may be 180° or more, which is further beneficial to uniform and rapid heating of the material 200 .

[0071] The lower pressure head 30 may include a microwave reflecting material, which can reflect microwaves after entering the mold cavity 103, thereby facilitating rapid and uniform heating of the material 200. Specifically, the upper pressure head 20 may be made of, but not limited to, steel.

[0072] When the wall body 101 , the upper pressure head 20 and the lower pressure head 30 are all made of steel materials, a microwave heating resonance cavity is formed between the wall body 101 , the upper pressure head 20 and the lower pressure head 30 , which is beneficial for quickly and evenly heating the material 200 in the mold cavity 103 .

[0073] See also Figure 2The number of the mounting holes 105 can be multiple, any two of the mounting holes 105 can be staggered, and the multiple mounting holes 105 can also include two opposite mounting holes. In this embodiment, any two of the mounting holes 105 are staggered, which facilitates the introduction of microwaves into the mold cavity 103 from various angles, thereby facilitating rapid and uniform heating of the material.

[0074] The shape of the mounting hole 105 at least partially matches the shape of the waveguide installed in the mounting hole 105 .

[0075] The sealing member 40 may be, but is not limited to, a ceramic member. The ceramic member is a ceramic material with good microwave permeability. In this embodiment, the ceramic material can allow 90% or more of microwaves to pass through.

[0076] See also Figure 5 The number of the sealing members 40 is correspondingly multiple, wherein each of the sealing members 40 is embedded in one of the mounting holes 105, thereby facilitating the construction of a relatively sealed pressing environment, and facilitating the abutment between the waveguide and the sealing member 40 during the subsequent connection of the waveguide, thereby facilitating the introduction of the microwaves in the waveguide into the mold cavity 103.

[0077] In some embodiments, see Figure 5 The diameter of the portion A of the mounting hole 105 close to the mold cavity 103 may increase in the direction close to the mold cavity 103, and the shape of the sealing member 40 also matches the shape of the portion of the mounting hole 105 close to the mold cavity 103. During assembly, the diameter of the portion of the mounting hole 105 close to the mold cavity 103 increases in the direction close to the mold cavity 103, which can guide the sealing member 40 and facilitate the installation of the sealing member 40.

[0078] In some embodiments, see Figure 2 and Figure 3 , the number of the seal 40 may also be one, in which case the seal 40 may cover the surface of the wall 101 facing the mold cavity 103. Specifically, the seal 40 may cover the entire surface of the wall 101 facing the mold cavity 103, which is helpful to prevent the material 200 from entering the gap between the wall 101 and the seal 40, especially when the material 200 is powder.

[0079] See also Figure 6, the sealing member 40 covers the surface of the wall body 101 facing the mold cavity 103, and can be further embedded in the mounting hole 105. Specifically, the sealing member 40 includes a first sealing portion 41 and at least one second sealing portion 43, the first sealing portion 41 covers the surface of the wall body 101 facing the mold cavity 103, each of the second sealing portions 43 is convexly arranged on the surface of the first sealing portion 41 facing the wall body 101, and each of the second sealing portions 43 is embedded in one of the mounting holes 105, so as to prevent the material 200 from entering the gap between the wall body 101 and the sealing member 40, and can also increase the bonding force between the sealing member 40 and the wall body 101, and is also beneficial to the abutment between the waveguide and the sealing member 40 when the waveguide is subsequently connected, so as to facilitate the introduction of the microwave in the waveguide into the mold cavity 103.

[0080] See also Figure 7 The mold 100 may further include an upper template 51 and a lower template 53 that are relatively arranged. The end of the upper press head 20 located outside the mold cavity 103 is connected to the upper template 51, and the end of the lower press head 30 located outside the mold cavity 103 is connected to the lower template 53. The upper press head 20 and the lower press head 30 can be subsequently connected to the driving member through the upper template 51 and the lower template 53 respectively. Due to the existence of the upper template 51 and the lower template 53, the force applied by the driving member to the upper press head 20 and the lower press head 30 is more evenly distributed, so that the pressure distribution is more even when the upper press head 20 and the lower press head 30 press the material 200.

[0081] See also Figure 8 The mold 100 can be applied to a compression molding device 300. The compression molding device 300 further includes a waveguide 60 corresponding to each of the mounting holes 105. One end of the waveguide 60 is inserted into the mounting hole 105 and abuts against the sealing member 40. The waveguide 60 is used to connect to a microwave generator and conduct microwaves generated by the microwave generator. The abutment of the waveguide 60 and the sealing member 40 is conducive to the microwaves in the waveguide 60 penetrating the sealing member 40 and being introduced into the mold cavity 103.

[0082] The compression molding device 300 further includes a first driving member 81. The driving shaft of the first driving member 81 is connected to the upper press head 20 or the lower press head 30, and is used to drive the upper press head 20 to move toward the lower press head 30 or drive the lower press head 30 to move toward the upper press head 20. Specifically, in this embodiment, the compression molding device 300 may further include a second driving member 83, the driving shaft of the first driving member 81 is connected to the upper press head 20 and drives the upper press head 20 to move toward the lower press head 30, and the driving shaft of the second driving member 83 is connected to the lower press head 30 and drives the lower press head 30 to move toward the upper press head 20.

[0083] The first driving member 81 may be, but not limited to, a hydraulic press. The second driving member 83 may be, but not limited to, a hydraulic press. The hydraulic press may be selected according to the actual required pressure.

[0084] In some embodiments, an upper pressing plate 55 is provided between the driving shaft of the first driving member 81 and the upper pressing head 20, and a lower pressing plate 57 is provided between the driving shaft of the second driving member 83 and the lower pressing head 30. The upper pressing head 20 and the lower pressing head 30 are subsequently connected to the driving member through the upper pressing plate 55 and the lower pressing plate 57, respectively. Due to the existence of the upper pressing plate 55 and the lower pressing plate 57, the force applied by the driving member to the upper pressing head 20 and the lower pressing head 30 is more evenly distributed, so that the pressure distribution is more even when the upper pressing head 20 and the lower pressing head 30 press the material 200. The upper pressing plate 55 and the upper template 51 can exist either or both, and the lower pressing plate 57 and the lower template 53 can exist either or both.

[0085] The compression molding device 300 may further include a frame 70 , the first driving member 81 is mounted on the frame 70 , and the second driving member 83 is mounted on the frame 70 .

[0086] The compression molding device 300 may further include at least one microwave generator 90. Each waveguide 60 is connected to a microwave generator 90. The microwave generator 90 generates microwaves and introduces them into the waveguide 60 for conduction through the waveguide 60. The microwave generator 90 may be, but is not limited to, a magnetron.

[0087] Based on the above-mentioned compression molding device 300, the present application also provides a compression molding method, comprising the following steps:

[0088] Placing the powder in the mold cavity 103 of the compression molding device 300 as described above;

[0089] The microwave generator 90 is turned on to heat the powder in the mold cavity 103 to a preset temperature by microwaves, and then the microwave generator 90 is turned off;

[0090] Driving the upper pressing head 20 and the lower pressing head 30 to press the heated powder;

[0091] Turning on the microwave generator 90 to heat the pressed powder to another preset temperature and then turning off the microwave generator 90; and

[0092] After cooling, the mold 100 is opened to take out the molded product.

[0093] In some embodiments, when the microwave generator 90 is turned on for heating, the relative rotation between the lower pressure head 30 and the wall 101 can be further controlled to further facilitate heating the powder from various angles, thereby facilitating uniform and rapid heating of the powder.

[0094] The powder may include at least one of inorganic non-metallic particles and polymer material particles. Further, the powder may also include metal particles.

[0095] In some embodiments, before placing the powder in the mold cavity 103 , the die-casting method may further include placing a coil winding in the mold cavity 103 of the die-casting device 300 , so that an inductor may be obtained after subsequent die-casting.

[0096] It should be noted that the above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; the implementation methods of the present application and the features in the implementation methods can be combined with each other without conflict. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A mold, characterized in that: include: A wall body surrounding a mold cavity, wherein the entire wall body is made of microwave reflecting material; Upper pressure head; A lower pressure head, the lower pressure head and the upper pressure head are arranged on the wall body opposite to each other and extend into the mold cavity respectively, and the lower pressure head is rotatably connected to the wall body; At least one mounting hole penetrates the wall; At least one sealing member, each of which comprises a microwave penetrating material, each of which seals an opening of the mounting hole toward the mold cavity, the sealing member comprises a first sealing portion and at least one second sealing portion, the first sealing portion covers a surface of the wall body facing the mold cavity, each of the second sealing portions is convexly disposed on a surface of the first sealing portion facing the wall body, and each of the second sealing portions is embedded in one of the mounting holes; as well as At least one waveguide tube, one end of each waveguide tube is inserted into one of the mounting holes and abuts against the sealing member.

2. The mold according to claim 1, characterized in that Each of the sealing members is embedded in one of the mounting holes.

3. The mold according to claim 1, characterized in that The number of the sealing member is one, and the sealing member covers the surface of the wall body facing the mold cavity.

4. The mold according to claim 1, characterized in that At least one of the upper pressure head and the lower pressure head includes a microwave reflecting material.

5. The mold according to claim 1 or 4, characterized in that: The microwave reflecting material is steel, and each of the sealing components is a ceramic component.

6. The mold according to claim 1, characterized in that The mold also includes an upper mold plate and a lower mold plate that are arranged opposite to each other. One end of the upper press head is located outside the mold cavity and connected to the upper mold plate, and one end of the lower press head is located outside the mold cavity and connected to the lower mold plate.

7. A compression molding device, characterized in that: It comprises a first driving member and a mold as described in any one of claims 1 to 6, wherein the driving shaft of the first driving member is connected to the upper pressure head or the lower pressure head, and one end of each of the waveguide tubes is inserted into one of the mounting holes and abuts against the sealing member.

8. The compression molding device according to claim 7, characterized in that: The driving shaft of the first driving member is connected to the upper pressing head and drives the upper pressing head to move toward the lower pressing head. The molding device also includes a second driving member, and the driving shaft of the second driving member is connected to the lower pressing head and drives the lower pressing head to move toward the upper pressing head.

9. The compression molding device according to claim 8, characterized in that: An upper pressing plate is provided between the driving shaft of the first driving member and the upper pressing head, and a lower pressing plate is provided between the driving shaft of the second driving member and the lower pressing head.

10. The compression molding device according to any one of claims 7 to 9, characterized in that: The compression molding device further comprises at least one microwave generator, and each of the waveguides is connected to one of the microwave generators.

11. A die casting method, characterized in that: The following steps are involved: Placing the powder in a mold cavity of the compression molding device as claimed in claim 10; Turning on the microwave generator to heat the powder in the mold cavity to a preset temperature using microwaves and then turning off the microwave generator; Driving the upper pressing head and the lower pressing head to press the heated powder; Turning on the microwave generator to heat the pressed powder to another preset temperature and then turning off the microwave generator; After cooling, the mold is opened and the molded product is taken out; When the microwave generator is turned on for heating, the pressure head and the wall are controlled to rotate relative to each other.

12. The die casting method according to claim 11, characterized in that: The powder includes at least one of inorganic non-metallic particles and polymer material particles.

13. The die casting method according to claim 12, characterized in that: The powder also includes metal particles.

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