Material particle preparation mold

Abstract

The utility model relates to the technical field of material particle preparation, and discloses a material particle preparation mold, which comprises a mold body, a plurality of material particles, a plurality of material particles, a plurality of material particles, a plurality of material particles, a plurality of material particles and a plurality of material particles, the supporting structure is connected with the granulating tank body, the supporting structure has a first state in which the supporting structure is flush with the inner wall surface of the granulating tank body and a second state in which a part of the supporting structure protrudes out of the inner wall surface of the granulating tank body, and the supporting structure is suitable for supporting the materials, so that a gap is formed between the materials and the granulating tank body. According to the material particle preparation mold provided by the utility model, the plurality of groove-shaped spaces for placing the material particles are arranged, so that the material particle preparation mold can be used for preparing a plurality of granular materials; in the material drying process, the supporting structure is in the second state to support the material so that a gap can be formed between the material and the groove wall of the granulation groove body, and therefore the contact area of the material and the granulation groove body is reduced, and the drying efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material particle preparation, in particular to a material particle preparation mould. Background Art

[0002] Freeze-drying technology is a novel drying method that freezes water-containing materials into solids and utilizes the sublimation properties of water under low-temperature and low-pressure conditions to dehydrate the materials at low temperatures to achieve drying. Freeze-drying technology can protect the structure and shape of the material to the greatest extent possible. When preparing dry material products, the material is usually placed in a material preparation mold and the material inside the mold is freeze-dried to obtain a high-quality dried product. However, existing material preparation molds can only be used to prepare larger block or cake-shaped materials and cannot be used to prepare multiple smaller granular materials. In addition, the contact area between the material and the mold is large, the water inside the material sublimates slowly, and the drying efficiency is low. Utility Model Content

[0003] In view of this, the present invention provides a material particle preparation mold to solve the problem that the existing material preparation mold is not suitable for the preparation of multiple smaller granular materials, the contact area between the material and the mold is large, and the drying efficiency is low.

[0004] The utility model provides a material particle preparation mold, comprising:

[0005] The mold body includes a plurality of granulation troughs, each of which has a trough-shaped space with an upward opening, and the trough-shaped space is suitable for accommodating materials;

[0006] The support structure is connected to the granulation trough body. The support structure has a first state in which it is flush with the inner wall surface of the granulation trough body, and a second state in which a partial area protrudes from the inner wall surface of the granulation trough body. In the second state, the support structure is suitable for supporting the material so that there is a gap between the material and the granulation trough body.

[0007] Beneficial effects: By providing a plurality of slot-shaped spaces for placing material particles on the mold body, the material particle preparation mold can be used to prepare a plurality of granular materials; during the drying process after the material is frozen, the support structure is in the second state to support the material so that there is a gap between it and the slot wall of the granulation slot body, thereby reducing the contact area between the material and the granulation slot body and improving the drying efficiency.

[0008] In an optional embodiment, the cross-sectional shape of the trough-shaped space along the gravity direction is an inverted trapezoid.

[0009] Beneficial effect: By making the trough space into an inverted trapezoid, the supporting structure protrudes from the inner wall surface of the granulating trough body, supporting the material to move upward a certain distance, thereby forming a gap between the material and the granulating trough body.

[0010] In an optional embodiment, the mold body further includes a shell, which is arranged on a side of the granulation trough body away from the trough space, and a first cavity is formed between the shell and the outer wall surface of the granulation trough body, and the first cavity is suitable for accommodating cold air.

[0011] In an optional embodiment, the granulation trough body includes a trough side wall and a trough bottom wall connected to each other, and the support structure includes a first support part and a second support part, the first support part is arranged on the trough side wall, and the second support part is arranged on the trough bottom wall.

[0012] In an optional embodiment, the first support portion and the second support portion include rubber membranes, and the first cavity has a pressurized state in which the pressure of the cold air inside is higher than the external atmospheric pressure. In the pressurized state, the rubber membrane has a protrusion toward the groove space.

[0013] In an optional embodiment, at least one first through hole is formed in the bottom wall of the groove, and the first through hole is suitable for connecting the first cavity and the groove-shaped space.

[0014] Beneficial effect: By opening a first through hole on the bottom wall of the trough, the cold air in the first cavity can flow to the gap between the material and the inner wall surface of the granulation trough body, thereby ensuring the contact effect between the material and the cold air, making it in a low temperature state, which is beneficial to improving the sublimation effect of the moisture in the material and thus improving the drying efficiency.

[0015] In an optional embodiment, a limiting structure is provided in the first cavity, and the limiting structure has a limiting state of abutting against a side of the supporting structure away from the groove-shaped space.

[0016] Beneficial effect: When freezing the material, the supporting structure is in the first state, and its side facing the trough space is flush with the inner wall surface of the granulation trough body, and the limiting structure is in the limiting state to avoid the supporting structure from deforming in the direction away from the trough space, thereby better supporting the material during the freezing process, avoiding deformation of the material particles, and ensuring the quality of the finished product of the material particles.

[0017] In an optional embodiment, an air inlet is provided on the shell, and the air inlet is suitable for being connected to the cold air delivery pipe to deliver cold air into the first cavity.

[0018] In an optional embodiment, the material particle preparation mold also includes a flange, which is arranged at the edge of the upper end surface of the mold body, and the flange has a second cavity connected to the first cavity. The flange is provided with a second through hole on the side wall near the groove-shaped space, and the second through hole is suitable for connecting the second cavity and the groove-shaped space.

[0019] Beneficial effect: By opening a second through hole on the side wall of the flange close to the groove-shaped space, the cold air in the first cavity is blown out through the second through hole, and a negative pressure state is formed near the second through hole. Since the second through hole is located at the upper part of the groove-shaped space, the flow efficiency of the cold air in the gap between the material particles and the granulation trough body can be improved, thereby improving the drying efficiency of the material particles.

[0020] In an optional embodiment, the axial direction of the second through hole is arranged at an acute angle to the horizontal direction, and along the blowing direction of the cold air, the axial direction of the second through hole is inclined upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of a mold for preparing material particles according to an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 A schematic cross-sectional view of a mold for preparing material particles is shown;

[0024] Figure 3 for Figure 2 A partial enlarged schematic diagram;

[0025] Figure 4 for Figure 2 The cross-sectional diagram of the limiting structure shown is in a limiting state;

[0026] Figure 5 for Figure 2 The cross-sectional diagram of the limiting structure shown is in a disengaged state.

[0027] Description of reference numerals:

[0028] 1. Mold body; 101. Groove-shaped space; 102. Granulating trough body; 1021. Groove side wall; 1022. Groove bottom wall; 103. Shell; 104. First cavity; 2. Support structure; 201. First support part; 202. Second support part; 3. Air inlet; 4. Limiting structure; 401. First limiting plate; 402. Second limiting plate; 403. Block; 5. Cold air delivery pipe; 6. Flange; 601. Second cavity; 602. Second through hole; 7. Sliding rod; 8. Operating rod; 9. Connecting rod; 10. Handle; 11. First through hole. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0030] The following combination Figures 1 to 5 , describing the embodiments of the present utility model.

[0031] According to an embodiment of the present invention, a mold for preparing material particles is provided, comprising:

[0032] The mold body 1 includes a plurality of granulation troughs 102, each of which has a trough-shaped space 101 with an upward opening, and the trough-shaped space 101 is suitable for accommodating materials;

[0033] The support structure 2 is connected to the granulation trough body 102. The support structure 2 has a first state in which it is flush with the inner wall surface of the granulation trough body 102, and a second state in which a partial area protrudes from the inner wall surface of the granulation trough body 102. In the second state, the support structure 2 is suitable for supporting the material so that there is a gap between the material and the granulation trough body 102.

[0034] The material particle preparation mold provided in this embodiment is capable of preparing a plurality of granular materials by providing a plurality of groove-shaped spaces 101 for placing material particles on the mold body 1. During the drying process after the material is frozen, the support structure 2 is in the second state to support the material so that there is a gap between the material and the groove wall of the granulation groove body 102, thereby reducing the contact area between the material and the granulation groove body 102 and improving the drying efficiency.

[0035] Specifically, two adjacent granulation trough bodies 102 are fixedly connected, and an opening is formed at the upper end of the granulation trough body 102 corresponding to the trough space 101, so as to be suitable for placing the material into the trough space 101 through the above opening. There is a spacing between one granulation trough body 102 and another adjacent granulation trough body 102. As an example, the plurality of granulation trough bodies 102 are evenly distributed on the mold body 1 along the horizontal direction at equal distances.

[0036] A plurality of cut material particles are placed into a plurality of slot-shaped spaces 101 respectively, and the material particles are frozen. During the freezing process, the support structure 2 is in a first state, that is, the side of the support structure 2 facing the slot-shaped space 101 is flush with the inner wall surface of the granulation tank body 102, so as to better support the material particles during the freezing process and prevent the material particles from being deformed. After the freezing is completed, during the sublimation process of the water inside the material particles, the support structure 2 is in a second state, at which a portion of the support structure 2 protrudes from the inner wall of the granulation tank body 102 toward the slot-shaped space 101 and abuts against the frozen material particles to lift them up, thereby creating a gap between the material particles and the inner wall of the granulation tank body 102, reducing the contact area between the material particles and the granulation tank body 102, and better dehydrating and drying the material particles. In addition, since the material particles are lifted up and separated from the inner wall of the granulation tank body 102, the demolding operation is also more convenient and quick. Since there is no liquid water during the freeze-drying process, the water directly sublimates in a solid state, so that the original structure and shape of the material particles are protected to the greatest extent, and finally a high-quality dried product with both appearance and internal quality is obtained.

[0037] In one embodiment, combined Figures 1 to 5 As shown, the cross-sectional shape of the slot-shaped space 101 along the gravity direction is an inverted trapezoid.

[0038] The material particle preparation mold provided in this embodiment makes the groove space 101 into an inverted trapezoidal shape, so that the support structure 2 protrudes from the inner wall surface of the granulation trough body 102, supports the material to move upward a certain distance, thereby creating a gap between the material and the granulation trough body 102.

[0039] Specifically, the inner side surface of the granulation trough 102 is configured as an inclined surface, and the horizontal cross-sectional area of the trough space 101 gradually decreases along the direction of gravity, forming an inverted terraced or truncated cone shape. The shape of the material particles is the same as that of the trough space 101, that is, the side surface of the material particles is also an inclined surface. When the support structure 2 protrudes from the inner wall of the granulation trough 102, the support structure 2 can support the material particles to move upward a certain distance, thereby creating a gap between the material particles and the inner wall of the granulation trough 102.

[0040] In one embodiment, combined Figures 1 to 5 As shown, the mold body 1 further includes a shell 103, which is arranged on the side of the granulation tank body 102 away from the groove space 101, and a first cavity 104 is formed between the shell 103 and the outer wall of the granulation tank body 102, and the first cavity 104 is suitable for accommodating cold air.

[0041] Specifically, as a feasible embodiment, the housing 103 is constructed as a plurality of separate parts and is respectively disposed on the side of the granulation tank 102 facing away from the trough space 101. A cavity is defined between each housing 103 and its corresponding granulation tank 102, and the plurality of cavities are connected to form a first cavity 104. As an alternative embodiment, the housing 103 is constructed as a single integral structure and is simultaneously disposed on the side of the plurality of granulation tanks 102 facing away from the trough space 101, forming the first cavity 104 between the housing 103 and the granulation tank 102. Cold air is introduced into the first cavity 104 to cool the material particles in the trough space 101, ensuring that they are kept at a low temperature to allow the water inside to sublime.

[0042] In one embodiment, combined Figures 1 to 5 As shown, the granulation trough body 102 includes a trough side wall 1021 and a trough bottom wall 1022 connected to each other, and the support structure 2 includes a first support part 201 and a second support part 202, the first support part 201 is arranged on the trough side wall 1021, and the second support part 202 is arranged on the trough bottom wall 1022.

[0043] Specifically, the first support portion 201 is elongated, with its length running parallel to the top of the groove sidewall 1021 toward the bottom. Multiple first support portions 201 are provided on the groove sidewall 1021, with the multiple first support portions 201 spaced apart horizontally. Preferably, the multiple first support portions 201 are equally spaced. At least one second support portion 202 is provided on the groove bottom wall 1022, and the second support portion 202 is circular or square in shape. When the supporting structure 2 is in the first state, the first supporting portion 201 is flush with the inner wall of the groove side wall 1021 on the side facing the groove space 101, and the second supporting portion 202 is flush with the inner wall of the groove bottom wall 1022 on the side facing the groove space 101; in the second state, the first supporting portion 201 protrudes from the inner wall of the groove side wall 1021 in the direction of the groove space 101, so as to be suitable for abutting and supporting the side of the material particles, and the second supporting portion 202 protrudes from the inner wall of the groove bottom wall 1022 in the direction of the groove space 101, so as to be suitable for abutting and supporting the lower end surface of the material particles.

[0044] In one embodiment, combined Figures 1 to 5 As shown, the first support portion 201 and the second support portion 202 include rubber membranes. The first cavity 104 has a pressurized state in which the pressure of the cold air inside is higher than the external atmospheric pressure. In the pressurized state, the rubber membrane has a bulge toward the groove space 101.

[0045] Specifically, a first through-hole is defined in the groove sidewall 1021 at a position corresponding to the first support portion 201. The first support portion 201 is located within the first through-hole and fixedly connected to the sidewall of the first through-hole to block the first through-hole. A second through-hole is defined in the groove bottom wall 1022 at a position corresponding to the second support portion 202. The second support portion 202 is located within the second through-hole and fixedly connected to the sidewall of the second through-hole to block the second through-hole. The first support portion 201 and the second support portion 202 are made of a flexible material commonly used in the prior art and suitable for use in this embodiment, such as a rubber membrane or a silicone membrane. Taking the rubber membrane as an example, cold air is introduced into the first cavity 104, and the air pressure of the cold air in the first cavity 104 is made higher than the external atmospheric pressure, thereby causing the rubber membrane to deform and bulge toward the trough space 101 to lift the material particles. The bulge of the rubber membrane is deformed into an arc, usually with a protruding apex, which better lifts the material particles and reduces the contact area between the inner wall of the granulation trough body 102 and the material particles, thereby facilitating the sublimation of moisture in the material particles and achieving a more efficient dehydration and drying effect. The rubber membrane can also meet the demand for small deformation in low temperature environments, avoiding phenomena such as freeze cracking and loss of deformation function.

[0046] In one embodiment, combined Figures 1 to 5 As shown, at least one first through hole 11 is defined in the bottom wall 1022 of the groove, and the first through hole 11 is adapted to connect the first cavity 104 and the groove-shaped space 101 .

[0047] The material particle preparation mold provided in this embodiment has a first through hole 11 opened on the bottom wall 1022 of the trough to facilitate the flow of cold air in the first cavity 104 to the gap between the material and the inner wall surface of the granulation trough body 102, thereby ensuring the contact effect between the material and the cold air, keeping it in a low temperature state, which is beneficial to improving the sublimation effect of moisture in the material and thus improving the drying efficiency.

[0048] Specifically, the cold air inside the first cavity 104 is suitable for entering the bottom of the trough space 101 through the first through hole 11, and is blown out to the outside of the mold through the gap between the material particles and the inner wall of the granulation trough body 102, so as to increase the contact area between the material particles and the cold air, thereby enhancing the contact effect between the cold air and the material particles, which is beneficial to promote the sublimation effect of the moisture inside the material particles, can accelerate the dehydration speed, improve the drying efficiency after freezing, and obtain freeze-dried material particles more quickly, thereby improving the production efficiency of preparing material particles.

[0049] In one embodiment, combined Figures 1 to 5 As shown, a limiting structure 4 is provided in the first cavity 104 , and the limiting structure 4 is in a limiting state of abutting against a side of the supporting structure 2 away from the groove-shaped space 101 .

[0050] In the material particle preparation mold provided in this embodiment, when freezing the material, the support structure 2 is in the first state, and its side facing the groove space 101 is flush with the inner wall surface of the granulation trough body 102, and the limiting structure 4 is in the limiting state to prevent the support structure 2 from deforming in the direction away from the groove space 101, thereby better supporting the material during the freezing process, avoiding deformation of the material particles, and ensuring the quality of the finished product of the material particles.

[0051] Specifically, the number of limiting structures 4 matches the number of granulation troughs 102. The limiting structures 4 have a limiting state, in which they abut the support structure 2, and a disengaged state, in which they are spaced apart from the support structure 2. The limiting structures 4 include a blocking block 403. The position of the blocking block 403 corresponds to the position of the first through hole 11, so that the first through hole 11 is blocked when the limiting structure 4 is in the limiting state. The end surface of the blocking block 403 facing the trough space 101 is coplanar with the upper end surface of the trough bottom wall 1022. When the limiting structure 4 is in the disengaged state, the blocking block 403 is separated from the first through hole 11.

[0052] During the freezing process of the material particles, the limiting structure 4 is in a limiting state. At this time, the limiting structure abuts against the supporting structure 2 to prevent the supporting structure 2 from deforming in a direction away from the trough space 101, resulting in the formation of pits on the inner wall of the granulation trough body 102, and the blocking block 403 blocks the first through hole 11, so that the material particles are better supported during the freezing process, avoiding deformation of the material particles and ensuring the quality of the finished product of the material particles.

[0053] After freezing is completed, during the drying process of the material particles, the limiting structure 4 moves in a direction away from the granulation tank body 102. At this time, the limiting structure 4 is in a disengaged state, and cold air is introduced into the first cavity 104. The air pressure in the first cavity 104 is made higher than the external atmospheric pressure, so that the support structure 2 protrudes from the inner wall of the granulation tank body 102 toward the groove space 101 under the action of the air pressure, and lifts the material particles. During the drying process, the cold air in the first cavity 104 can also enter the groove space 101 through the first through hole 11, so as to enhance the contact effect between the material particles and the cold air.

[0054] The limiting structure 4 includes a first limiting plate 401 and a second limiting plate 402 that are fixedly connected. The first limiting plate 401 and the second limiting plate 402 are arranged at an angle. When the limiting structure 4 is in the limiting state, the first limiting plate 401 is in contact with the outer wall of the groove side wall 1021 and abuts against the first support portion 201; the second limiting plate 402 is in contact with the outer wall of the groove bottom wall 1022 and abuts against the second support portion 202. A blocking block 403 is fixedly connected to the position of the second limiting plate 402 corresponding to the first through hole 11, and the blocking block 403 is inserted into the first through hole 11. When the limiting structure 4 is in the disengaged state, a gap is formed between the first limiting plate 401 and the outer wall of the groove side wall 1021, and a gap is formed between the second limiting plate 402 and the outer wall of the groove bottom wall 1022, and the blocking block 403 is separated from the first through hole 11.

[0055] The second limiting plate 402 is fixedly connected to a sliding rod 7 on the side away from the granulation tank body 102. One end of the sliding rod 7 is fixedly connected to the second limiting plate 402, and the other end passes through the shell 103 in a direction away from the granulation tank body 102 and is exposed to the shell 103. The sliding rod 7 is slidably and sealedly connected to the shell 103. The material particle preparation mold also includes a plurality of operating rods 8, which are located on the side of the shell 103 away from the granulation tank body 102 and are respectively fixedly connected to the plurality of sliding rods 7 so that the operator can push and pull the operating rods 8 to drive the limiting structure 4 to move, thereby switching it between the limiting state and the disengaged state. In addition, the material particle preparation mold also includes a connecting rod 9, which is fixedly connected to the plurality of operating rods 8 at the same time so as to drive the plurality of limiting structures 4 to move at the same time, thereby improving the operating efficiency and facilitating the batch freeze-drying preparation of material particles. Furthermore, a handle 10 is fixedly connected to the connecting rod 9 so that the operator can drive the connecting rod 9 to move through the handle 10, which is conducive to improving the convenience of operation.

[0056] In one embodiment, combined Figures 1 to 5 As shown, an air inlet 3 is provided on the shell 103 , and the air inlet 3 is suitable for being connected to the cold air delivery pipe 5 to deliver cold air into the first cavity 104 .

[0057] Specifically, at least one air inlet 3 is provided on the shell 103 , and each air inlet 3 is connected to a cold air delivery pipe 5 , so as to deliver cold air into the first cavity 104 through the cold air delivery pipe 5 .

[0058] In one embodiment, combined Figures 1 to 5 As shown, the material particle preparation mold also includes a flange 6, which is arranged at the edge of the upper end surface of the mold body 1. The flange 6 has a second cavity 601 connected to the first cavity 104. The flange 6 has a second through hole 602 on the side wall close to the groove space 101. The second through hole 602 is suitable for connecting the second cavity 601 and the groove space 101.

[0059] The material particle preparation mold provided in this embodiment opens a second through hole 602 on the side wall of the flange 6 near the groove-shaped space 101, so that the cold air in the first cavity 104 is blown out through the second through hole 602 and a negative pressure state is formed near the second through hole 602. Since the second through hole 602 is located at the upper part of the groove-shaped space 101, the flow efficiency of the cold air in the gap between the material particles and the granulation trough body 102 can be improved, thereby improving the drying efficiency of the material particles.

[0060] Specifically, the flange 6 is arranged around the edge of the upper end surface of the mold body 1, and the flange 6 is higher than the granulation tank body 102. The flange 6 has a second cavity 601 inside, which is connected to the first cavity 104, so that the cold air inside the first cavity 104 can be blown out through the second through hole 602, thereby improving the flow efficiency of the cold air in the gap between the material particles and the granulation tank body 102. When cold air is introduced into the first cavity 104, the air intake at the air inlet 3 is first made greater than the air output at the first through hole 11 and the second through hole 602 to increase the air pressure in the first cavity 104. When the support structure 2 is deformed under the action of the air pressure and lifts the material particles, the air intake at the air inlet 3 is gradually reduced until it reaches equilibrium with the air output at the first through hole 11 and the second through hole 602.

[0061] In one embodiment, combined Figures 1 to 5 As shown, the axis direction of the second through hole 602 is set at an acute angle to the horizontal direction, and along the blowing direction of the cold air, the axis direction of the second through hole 602 is inclined upward.

[0062] Specifically, the angle between the axis direction of the second through hole 602 and the horizontal direction ranges from 3° to 15°.

[0063] Obviously, the above embodiments are merely examples for the purpose of clarity of explanation and are not intended to limit the implementation methods. Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present invention.

Claims

1. A mold for preparing material particles, characterized in that: include: The mold body (1) comprises a plurality of granulation troughs (102), each of which has a trough-shaped space (101) with an upward opening, and the trough-shaped space (101) is suitable for accommodating materials; A support structure (2) is connected to the granulation trough body (102), and the support structure (2) has a first state in which it is flush with the inner wall surface of the granulation trough body (102), and a second state in which a part of the area protrudes from the inner wall surface of the granulation trough body (102). In the second state, the support structure (2) is suitable for supporting the material so that there is a gap between the material and the granulation trough body (102).

2. The material particle preparation mold according to claim 1, characterized in that: The cross-sectional shape of the groove-shaped space (101) along the gravity direction is an inverted trapezoid.

3. The material particle preparation mold according to claim 1, characterized in that: The mold body (1) further comprises a shell (103), wherein the shell (103) is arranged on a side of the granulation trough (102) away from the trough-shaped space (101), and a first cavity (104) is formed between the shell (103) and the outer wall surface of the granulation trough (102), wherein the first cavity (104) is suitable for accommodating cold air.

4. The material particle preparation mold according to claim 3, characterized in that: The granulation trough body (102) includes a trough side wall (1021) and a trough bottom wall (1022) connected to each other, and the support structure (2) includes a first support portion (201) and a second support portion (202), wherein the first support portion (201) is arranged on the trough side wall (1021), and the second support portion (202) is arranged on the trough bottom wall (1022).

5. The material particle preparation mold according to claim 4, characterized in that: The first supporting portion (201) and the second supporting portion (202) include rubber membranes, and the first cavity (104) has a pressurized state in which the pressure of the cold air inside the cavity is higher than the external atmospheric pressure. In the pressurized state, the rubber membrane has a bulge toward the groove-shaped space (101).

6. The material particle preparation mold according to claim 4, characterized in that: The groove bottom wall (1022) is provided with at least one first through hole (11), and the first through hole (11) is suitable for connecting the first cavity (104) and the groove-shaped space (101).

7. The material particle preparation mold according to claim 3, characterized in that: A limiting structure (4) is provided in the first cavity (104), and the limiting structure (4) is in a limiting state of abutting against a side of the supporting structure (2) away from the groove-shaped space (101).

8. The material particle preparation mold according to claim 3, characterized in that: An air inlet (3) is provided on the shell (103), and the air inlet (3) is suitable for being connected to a cold air delivery pipe (5) to deliver cold air into the first cavity (104).

9. The material particle preparation mold according to any one of claims 3 to 8, characterized in that: The material particle preparation mold also includes a flange (6), which is arranged at the edge of the upper end surface of the mold body (1), and has a second cavity (601) connected to the first cavity (104) inside the flange (6), and a second through hole (602) is opened on the side wall of the flange (6) close to the groove-shaped space (101), and the second through hole (602) is suitable for connecting the second cavity (601) and the groove-shaped space (101).

10. The material particle preparation mold according to claim 9, characterized in that: The axial direction of the second through hole (602) is arranged at an acute angle to the horizontal direction, and along the blowing direction of the cold air, the axial direction of the second through hole (602) is inclined upward.

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