Liquid absorption core mold, liquid absorption core mold preparation method and liquid absorption core preparation method

Abstract

The invention relates to a liquid absorption core mold, a liquid absorption core mold preparation method and a liquid absorption core preparation method, the liquid absorption core mold comprises a containing part of a semi-surrounding structure and a liquid absorption core reverse structure formed by vertically arranging a plurality of slices in the containing part in the same direction, and the tops of the slices are all lower than the lowest edge of the containing part; the wick reverse structure comprises high rib grooves and main bosses which are formed by combining the slices, parallel to the extending direction of the slices and arranged at intervals. The main boss comprises secondary bosses which are located at the top and are parallel to the extension direction of the slice, and a low rib groove is formed between every two adjacent secondary bosses; the depth of the low rib grooves is smaller than that of the high rib grooves. According to the liquid absorption core mold, the liquid absorption core mold preparation method and the liquid absorption core preparation method, preparation of molds of different shapes and sizes is rapidly achieved by stacking the slices which can be processed independently at the same time, can be disassembled and assembled and can be reused, and composite liquid absorption cores of different structures can be rapidly prepared on a large scale at low cost.

Description

Technical Field

[0001] The invention relates to the technical field of liquid absorbent core processing, in particular to a liquid absorbent core mold, a liquid absorbent core mold preparation method and a liquid absorbent core preparation method. Background Art

[0002] Planar heat pipes are widely used to dissipate heat from microelectronic devices. Liquid working fluid absorbs heat in the evaporation zone and evaporates and vaporizes. It releases heat in the condensation zone to form liquid. The liquid working fluid returns from the condensation zone to the evaporation zone through the capillary force of the wick, completing the gas-liquid cycle and realizing the unpowered rapid heat extraction from the evaporation zone. The capillary force of the wick determines whether the liquid working fluid can quickly return to the evaporation zone to prevent the evaporation zone from drying up and causing the flat heat pipe to fail. Therefore, the wick is the core component of the flat heat pipe, which not only serves as a liquid flow channel, but also provides capillary force to drive liquid circulation. The existing wick has the problem of contradiction between its capillary force and liquid flow resistance (permeability): if the capillary force of the wick is to be increased, a very small effective capillary pore radius needs to be set, but the liquid flow resistance will increase (small permeability); if the liquid flow resistance is to be reduced (large permeability), the pore size of the wick needs to be increased, but the capillary suction force will be reduced, resulting in the problem of reverse flow of steam.

[0003] The existing technology often uses a liquid absorbent core with a high aspect ratio groove to solve the above problems. The composite liquid absorbent core combines the advantages of liquid absorbent cores with different structures, and has attracted widespread attention. Utility model patent CN215930656U discloses an ultra-thin heat spreader space distributed composite micro-nano liquid absorbent core, which has multiple concave cavities uniformly etched on the lower cover of the heat spreader, and bosses are formed between the concave cavities; the surface of the concave cavity is uniformly etched with multiple longitudinal sub-grooves and transverse sub-grooves; the micro-nano composite structure is induced by uniformly densely distributed laser ablation, forming a liquid absorbent core structure with low gas-liquid flow resistance, and high capillary pressure and reflux permeability. Invention patent CN106440898A discloses a flat heat pipe composite grooved liquid wick and a preparation method thereof, wherein the surface of the flat heat pipe is processed with a composite grooved capillary structure consisting of a main groove and a secondary groove, wherein both the main groove and the secondary groove have a large depth-to-width ratio, which can greatly increase the capillary pressure, while significantly increasing the cross-sectional area of ​​liquid reflux and reducing the liquid reflux resistance; the main groove is formed by focused laser etching on the surface of a metal substrate, and the secondary groove is formed by adjacent slag deposits between adjacent main groove surfaces.

[0004] The absorbent core with high aspect ratio grooves is often manufactured by powder sintering, etching, laser and other processing methods; the existing absorbent core mold can only produce a kind of absorbent core with a specific structure and size, and its use is single, and it cannot be reused to produce absorbent cores of various shapes and specifications, especially the absorbent core with micron-level high aspect ratio grooves, which has a long processing cycle, great processing difficulty, poor fault tolerance, high processing cost, low production efficiency and pass rate. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a wick mold and a wick mold preparation method and a wick preparation method, which can produce wicks with micron-level high aspect ratio grooves of various shapes and specifications, and can realize rapid, large-scale and low-cost preparation of composite wicks, which is of great significance for the efficient operation and heat transfer of flat heat pipes.

[0006] A liquid absorbent core mold comprises a receiving portion with a half-enclosed structure and a liquid absorbent core reverse structure formed by a plurality of slices vertically arranged in the receiving portion and arranged in the same direction, wherein the tops of the slices are all lower than the lowest edge of the receiving portion; the liquid absorbent core reverse structure comprises a plurality of high rib grooves and a plurality of main bosses formed by the combination of the slices and parallel to the extension direction of the slices, wherein the high rib grooves and the main bosses are spaced apart from each other; the main bosses comprise a plurality of secondary bosses located at the top and parallel to the extension direction of the slices, and a low rib groove is formed between adjacent secondary bosses; the depth of the low rib groove is less than the depth of the high rib groove.

[0007] Compared with the existing absorbent core mold, the absorbent core mold of the present invention adopts slices that can be processed separately, disassembled and assembled, and reused to prepare the absorbent core reverse structure, and can quickly produce absorbent core molds of different shapes and specifications, thereby improving the utilization rate of materials; in addition, when a part of the mold is damaged, only the corresponding slice needs to be replaced, and there is no need to replace the entire mold, thereby reducing the maintenance cost.

[0008] Furthermore, the ratio of the high rib groove depth h to the main boss width d is h: d≥1; the high rib groove depth h is the height difference from the top of the main boss to the bottom of the high rib groove. When the ratio of the high rib groove depth to the main boss width is ≥1, the groove depth-to-width ratio of the obtained absorbent core is ≥1. After a lot of research, the inventor found that the absorbent core with a groove depth-to-width ratio ≥1 has a higher capillary force and a smaller liquid flow resistance (larger permeability).

[0009] Furthermore, the number of the low rib grooves on the top of the main boss is not less than 2. Experimental studies have shown that when the depth-to-width ratio of the grooves of the absorbent core is the same, the more low ribs there are in the grooves, the stronger the capillary force of the absorbent core; the number of low rib grooves on the top of the main boss of the absorbent core mold is not less than 2, which is conducive to the preparation of absorbent cores with stronger capillary force.

[0010] Furthermore, the cross-sectional shapes of the high rib groove, the low rib groove, the main boss and the secondary boss are at least one of rectangular, V-shaped and arc-shaped.

[0011] Furthermore, the width of the main boss is in the sub-millimeter level, and the width of the secondary boss is in the micrometer level.

[0012] Furthermore, the absorbent core mold also includes a plurality of positioning channels and a plurality of plug-ins; the positioning channels penetrate the accommodating portion and the absorbent core reverse structure; the slices and the accommodating portion are provided with positioning holes of the same shape and size at corresponding positions; the positioning holes at corresponding positions of the slices and the accommodating portion are combined to form the positioning channels; the different positioning channels are parallel to each other; the plug-ins are adapted to the positioning channels in shape and size, and the plug-ins penetrate and are fixed in the positioning channels.

[0013] Furthermore, the accommodating portion includes a accommodating bottom plate and a rectangular frame, and the rectangular frame is fixed on the accommodating bottom plate; the rectangular frame includes two first height-fixing plates arranged parallel to each other and two second height-fixing plates arranged parallel to each other, and the first height-fixing plates and the second height-fixing plates are arranged perpendicular to each other; the first height-fixing plate is provided with the positioning through hole, and the slice is arranged in the accommodating portion parallel to the first height-fixing plate according to design requirements.

[0014] A method for preparing the above-mentioned liquid-absorbing core mold comprises the following steps:

[0015] A1: Designing a mold for the liquid-absorbing core, specifically including the height and shape of the accommodating portion, the number, width, height and shape of the main boss and the secondary boss, and the number, depth, width and shape of the high rib groove and the low rib groove, to obtain a mold model;

[0016] A2: preparing the receiving portion according to the mold model;

[0017] A3: According to the reverse structure design of the absorbent core in the mold model, the thickness of each slice when sliced ​​along the extension direction of the high rib groove is obtained, and a slice model of each slice is obtained, and the slice conforming to the slice model is processed and prepared or selected;

[0018] A4: According to the mold model, the slices of step A3 are vertically arranged in the receiving portion in the same direction to form the absorbent core mold.

[0019] The method for preparing a liquid absorbent core mold of the present invention can quickly prepare the mold by stacking slices, which not only shortens the production cycle of the liquid absorbent core mold, but also improves the fault tolerance rate in the model making process, improves the utilization rate of the slice materials, and reduces the production cost.

[0020] Furthermore, the processing method of step A3 is: forming the slice model by laser cutting to achieve the micron level requirement of the slice width.

[0021] A method for preparing a liquid absorbent core based on the above liquid absorbent core mold comprises the following steps: laying the powder material for preparing the liquid absorbent core on the upper surface of the liquid absorbent core mold, flattening it with a scraper, and placing it in a high-temperature atmosphere furnace for high-temperature sintering to obtain a liquid absorbent core rough blank; placing the liquid absorbent core rough blank in a corrosive solution for etching to form a surface nanostructure to obtain the desired liquid absorbent core. The capillary capacity of the liquid absorbent core is further improved.

[0022] The present invention is a method for preparing a liquid absorbent core based on the above-mentioned liquid absorbent core mold. By adopting the above-mentioned liquid absorbent core mold and combining it with a powder sintering method, a liquid absorbent core blank with a groove structure of high / low ribs and a micron-level high aspect ratio groove can be prepared. Then, an etching method is combined to form a nanostructure on the surface of the liquid absorbent core blank, further improving the capillary capacity of the liquid absorbent core, and finally obtaining the desired liquid absorbent core that meets the design requirements. Compared with the existing overall processing method, the liquid absorbent core preparation method of the present invention can quickly, large-scale, and low-cost realize the preparation of liquid absorbent cores with micron-level high aspect ratio grooves of different shapes and specifications.

[0023] Furthermore, the powder is powder of copper, aluminum, stainless steel, ceramic, etc.

[0024] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a bionic liquid-absorbing core expected to be produced by the present invention;

[0026] Figure 2 for Figure 1 A schematic cross-sectional view of the wick;

[0027] Figure 3 It is a structural schematic diagram of the liquid-absorbing core mold described in Example 1;

[0028] Figure 4 is a cross-sectional view of the wick mold described in Example 1;

[0029] Figure 5 It is a schematic diagram of the slice structure of the liquid-absorbing core mold;

[0030] Figure 6 is a cross-sectional view of the wick mold described in Example 2; DETAILED DESCRIPTION

[0031] See also Figure 1-2The villi on the surface of the plant red pitcher grass are a special structure of hierarchical micro grooves with high / low ribs. This unique structure helps it to achieve rapid water transport and has super high capillary capacity. Inspired by the microstructure of the villi on the surface of the red pitcher grass, the inventor designed a liquid absorbent core with high aspect ratio grooves as shown in the figure, including a liquid absorbent core bottom plate 1', a plurality of high ribs 2', a plurality of low ribs 3', a plurality of main grooves 4' and a plurality of secondary grooves 5'; the high ribs 2' are higher than the low ribs 3' in the height direction of the liquid absorbent core; the adjacent high ribs 2' are arranged in parallel on the liquid absorbent core bottom plate 1', and the main grooves 4' are formed between the adjacent high ribs 2'; the low ribs 3' are evenly distributed in the main grooves 4' and arranged in parallel to the high ribs 2', and the secondary grooves 5' are formed between the adjacent low ribs 3' or between the adjacent low ribs 3' and the high ribs 2'. Further, the number of the low ribs 3' in each of the main grooves 4' is not less than 2. Further, the main groove 4' is a sub-millimeter structure, and the secondary groove 5' is a micrometer structure. Further, the cross-sectional shape of the high rib 2', the low rib 3', the main groove 4' and the secondary groove 5' is at least one of a rectangular, V-shaped, arc-shaped, etc.

[0032] The absorbent core mold of the present invention includes an absorbent core reverse structure 2 formed by a plurality of slices 22 vertically arranged in the same direction in the accommodating portion 1, the absorbent core reverse structure 2 includes a plurality of high rib grooves 23 and a plurality of main bosses 24 formed by the slices 22 in parallel to the extension direction of the slices 22, and the main bosses 24 include a plurality of secondary bosses 242 located at the top and parallel to the extension direction of the slices 22, and low rib grooves 244 are formed between adjacent secondary bosses 242. The high rib grooves 23 of the absorbent core mold of the present invention correspond to the high ribs 2' of the absorbent core, the main bosses 24 correspond to the main grooves 4', the low rib grooves 244 correspond to the low ribs 3', and the secondary bosses 242 correspond to the secondary grooves 5'.

[0033] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0034] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0035] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it is to be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0039] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.

[0040] See also Figure 3-5A liquid-absorbent core mold of the present invention comprises a receiving portion 1, a liquid-absorbent core reverse structure 2, a positioning channel 3 and a plug-in; the receiving portion 1 is a semi-enclosed structure, the liquid-absorbent core reverse structure 2 is arranged in the receiving portion 1, and the positioning channel 3 passes through the receiving portion 1 and the liquid-absorbent core reverse structure 2; the plug-in is adapted to the shape and size of the positioning channel 3, and the plug-in passes through and is fixed in the positioning channel 3.

[0041] The accommodating portion 1 includes a accommodating bottom plate and a fixed frame, and the fixed frame is fixed on the accommodating bottom plate to form a semi-enclosed structure; preferably, the fixed frame is a rectangular frame, and the rectangular frame includes two first height-fixing plates 122 arranged parallel to each other and two second height-fixing plates 123 arranged parallel to each other, the first height-fixing plates 122 and the second height-fixing plates 123 are arranged perpendicular to each other, and the first height-fixing plates 122 and the second height-fixing plates 123 have the same height.

[0042] The absorbent core reverse structure 2 is fixed in the accommodating portion 1, and is formed by a plurality of slices 22 vertically arranged in the accommodating portion 1 and arranged in the same direction, and the slices 22 are parallel to the first height-fixing plate 122; the height of the slices 22 is lower than the height of the first height-fixing plate 122 and the second height-fixing plate 123. The absorbent core reverse structure 2 includes a plurality of high rib grooves 23 and a plurality of main bosses 24 formed by the combination of the slices 22 and parallel to the extension direction of the slices 22, and the high rib grooves 23 and the main bosses 24 are arranged at intervals from each other; the high rib grooves 23 are formed between adjacent main bosses 24 and between the main bosses 24 and the first height-fixing plate 122; the ratio of the depth h of the high rib groove 23 (the depth h of the high rib groove is the height difference from the top of the main boss to the bottom of the high rib groove) to the width d of the main boss 24 is h: d≥1. The main boss 24 includes a plurality of secondary bosses 242 located at the top and parallel to the extension direction of the slice 22, and low rib grooves 244 are formed between adjacent secondary bosses 242; the number of the low rib grooves 244 on the main boss 24 is not less than 2. The width of the main boss 24 is sub-millimeter level, and the width of the secondary boss 242 is micrometer level. The depth of the low rib groove 244 is less than the depth of the high rib groove 23; the cross-sectional shape of the high rib groove 23, the low rib groove 244, the main boss 24 and the secondary boss 242 is at least one of a rectangular, a V-shaped and an arc-shaped.

[0043] The thickness of the wick bottom plate 1 ′ depends on the height difference between the top of the slice 22 and the first height setting plate 122 and / or the second height setting plate 123 .

[0044] A first positioning through hole 311, a second positioning through hole 321 and a third positioning through hole 331 of the same shape and size are respectively provided at corresponding positions on the two first height determining plates 122 and the slice 22; the first height determining plate 122 and the first positioning through hole 311 on the slice 22 are combined to form a first positioning channel 31; the first height determining plate 122 and the second positioning through hole 321 on the slice 22 are combined to form a second positioning channel 32; the first height determining plate 122 and the third positioning through hole 331 on the slice 22 are combined to form a third positioning channel 33; the first positioning channel 31, the second positioning channel 32 and the third positioning channel 33 are parallel to each other.

[0045] The plug-in includes a first plug-in, a second plug-in and a third plug-in. The first plug-in, the second plug-in and the third plug-in are respectively adapted to the shapes and sizes of the first positioning channel 31, the second positioning channel 32 and the third positioning channel 33, and are respectively penetrated and fixed in the first positioning channel 31, the second positioning channel 32 and the third positioning channel 33, thereby realizing the positioning and fixed connection between the slice 22 and the accommodating portion 1.

[0046] A method for preparing a liquid absorbent core based on the above liquid absorbent core mold comprises the following steps: laying powder material for preparing the liquid absorbent core on the upper surface of the liquid absorbent core mold, flattening it with a scraper, and placing it in a high-temperature atmosphere furnace for high-temperature sintering to obtain a liquid absorbent core rough blank; placing the liquid absorbent core rough blank in a corrosive solution for etching to form a surface nanostructure to obtain the desired liquid absorbent core. The powder is copper, aluminum, stainless steel, ceramic, etc.

[0047] Example 1

[0048] See also Figure 3-4 The slice 22 of this embodiment includes a plurality of high rib groove plates 222, a plurality of low rib groove plates 223 and a plurality of secondary boss plates 225, all of which have heights lower than the first height-fixing plate 122 and / or the second height-fixing plate 123; the height of the secondary boss plate 225 is higher than the low rib groove plate 223 and higher than the high rib groove plate 222.

[0049] The high rib groove plate 222 , the low rib groove plate 223 and the secondary boss plate 225 are arranged in the same direction corresponding to the high ribs 2 ′, the low ribs 3 ′ and the secondary grooves 5 ′ of the desired bionic absorbent core, and are vertically arranged in the accommodating portion 1 parallel to the first height-fixing plate 122 .

[0050] The high rib groove 23 is formed by the high rib groove plate 222 and the adjacent secondary boss plate 225 , or the high rib groove 23 is formed by the secondary boss plate 225 and the adjacent first height-fixing plate 122 .

[0051] The main boss 24 is formed by the low-rib groove plates 223 between the adjacent high-rib groove plates 222 and the portion of the secondary boss plate 225 that is higher than the high-rib groove plates 222 .

[0052] The secondary boss 242 is a portion of the secondary boss plate 225 that is higher than the low rib groove plate 223 .

[0053] The low rib groove 244 is formed by the low rib groove plate 223 and the adjacent secondary boss plate 225 .

[0054] A method for preparing a liquid wick mold comprises the following steps:

[0055] A1: Designing the liquid-absorbing core mold, specifically including the height and shape of the first height-fixing plate 122 and the second height-fixing plate 123, the number, width, height and shape of the main boss 24 and the secondary boss 242, the number, depth, width and shape of the high rib groove 23 and the low rib groove 244, to obtain a mold model;

[0056] A2: Prepare the bottom plate of the accommodating portion 1, the first height-fixing plate 122 and the second height-fixing plate 123 according to the mold model;

[0057] A3: According to the design of the liquid absorbent core reverse structure 2 in the mold model, the thickness of each of the high rib groove plate 222, the low rib groove plate 223 and the secondary boss plate 225 when sliced ​​along the extension direction of the high rib groove 23, and the slice model of each of the high rib groove plate 222, the low rib groove plate 223 and the secondary boss plate 225 is obtained, and the high rib groove plate 222, the low rib groove plate 223 and the secondary boss plate 225 that meet the slice model are processed and prepared or selected; the specific processing method is: the high rib groove plate 222, the low rib groove plate 223 and the secondary boss plate 225 are formed by laser cutting according to the slice model, so as to achieve the micron level requirement of the width of the high rib groove plate 222, the low rib groove plate 223 and the secondary boss plate 225;

[0058] A4: According to the mold model, the high rib groove plate 222, the low rib groove plate 223 and the secondary boss plate 225 of step A3 are vertically arranged in the accommodating portion 1 in the same direction to form the absorbent core mold.

[0059] Example 2

[0060] See also Figure 3 , Figure 5 and Figure 6The slice 22 of this embodiment includes a plurality of high rib groove plates 222 and a plurality of main boss plates 224 that are spaced apart from each other, and the heights of the high rib groove plates 222 and the main boss plates 224 are both lower than the height of the first height-fixing plate 122 and / or the second height-fixing plate 123; the height of the main boss plate 224 is higher than the high rib groove plates 222.

[0061] The high rib groove plate 222 and the main boss plate 224 are arranged in the same direction corresponding to the high ribs 2 ′ and the main grooves 4 ′ of the desired bionic absorbent core, and are vertically disposed in the accommodating portion 1 parallel to the first height-fixing plate 122 .

[0062] The high rib groove 23 is formed by the high rib groove plate 222 and the adjacent main boss plate 224 , or the high rib groove 23 is formed by the main boss plate 224 and the adjacent first height-fixing plate 122 .

[0063] The main boss plate 224 is higher than the structure of the adjacent high rib groove plate 222 to form the main boss 24, and the main boss 24 includes a plurality of secondary bosses 242 located at the top and parallel to the extension direction of the slice 22, and low rib grooves 244 are formed between adjacent secondary bosses 242; the depth of the low rib grooves 244 is less than the depth of the high rib grooves 23.

[0064] A method for preparing a liquid wick mold comprises the following steps:

[0065] A1: Designing the liquid-absorbing core mold, specifically including the height and shape of the first height-fixing plate 122 and the second height-fixing plate 123, the number, width, height and shape of the main boss 24 and the secondary boss 242, the number, depth, width and shape of the high rib groove 23 and the low rib groove 244, to obtain a mold model;

[0066] A2: Prepare the bottom plate of the accommodating portion 1, the first height-fixing plate 122 and the second height-fixing plate 123 according to the design requirements of the mold model;

[0067] A3: According to the design of the liquid absorbent core reverse structure 2 in the mold model, the thickness of each of the high rib groove plates 222 and the main boss plate 224 when sliced ​​along the extension direction of the high rib groove 23, and the slice model of each of the high rib groove plates 222 and the main boss plate 224 is obtained, and the high rib groove plates 222 and the main boss plate 224 that meet the slice model are processed and prepared or selected; the specific processing method is: the high rib groove plates 222 and the main boss plate 224 are formed by laser cutting according to the slice model, so as to achieve the micron level requirement of the width of the high rib groove plates 222 and the main boss plate 224;

[0068] A4: According to the mold model, the high rib groove plate 222 and the main boss plate 224 of step A3 are vertically arranged in the accommodating portion 1 in the same direction to form the absorbent core mold.

[0069] Compared with Example 1, this Example 2 prepares the wick mold by processing or selecting a main boss plate 224 that meets the design requirements. By selecting a main boss plate 224 with a fixed width and a high rib groove plate 222 with a certain height, the required ratio h:d of the high rib groove depth h to the main boss width d can be quickly matched, reducing the selection of the type and quantity of slices and the time for arranging and placing the slices, and the required wick mold can be stacked and produced more quickly, shortening the production cycle of the wick mold.

[0070] A liquid absorbent core mold and a method for preparing a liquid absorbent core mold and a method for preparing a liquid absorbent core of the present invention adopt slices that can be processed separately at the same time, can be disassembled and assembled, and can be reused to prepare a liquid absorbent core reverse structure 2, and mold preparation is quickly realized by stacking slices; by designing the thickness, shape, number and arrangement order of the accommodating portion 1 and the slices 22, liquid absorbent core molds of different shapes and structures can be formed, and combined with a powder sintering method and an etching method, liquid absorbent cores of different shapes and specifications with hierarchical micro-grooves having high / low ribs and having micron-level high aspect ratio grooves that meet the design requirements can be prepared quickly, on a large scale and at low cost, to obtain a liquid absorbent core with strong capillary force and low liquid flow resistance (high permeability). A liquid absorbent core mold and a method for preparing a liquid absorbent core mold and a method for preparing a liquid absorbent core of the present invention not only shorten the processing cycle of production, improve the fault tolerance rate in the model making process, but also improve the utilization rate of the slice material and reduce the production cost.

[0071] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and the present invention is also intended to include these modifications and modifications.

Claims

1. A liquid wick mold, characterized in that: It includes a receiving portion with a half-enclosed structure and a liquid-absorbing core reverse structure formed by a plurality of slices vertically arranged in the receiving portion and arranged in the same direction, wherein the tops of the slices are all lower than the lowest edge of the receiving portion; the liquid-absorbing core reverse structure includes a plurality of high-rib grooves and a plurality of main bosses formed by the combination of the slices and parallel to the extension direction of the slices, wherein the high-rib grooves and the main bosses are spaced apart from each other; the main bosses include a plurality of secondary bosses located at the top and parallel to the extension direction of the slices, and low-rib grooves are formed between adjacent secondary bosses; the depth of the low-rib grooves is less than the depth of the high-rib grooves.

2. The liquid wick mold according to claim 1, characterized in that: The ratio h of the high rib groove depth h to the main boss width d is: d≥1; the high rib groove depth h is the height difference from the top of the main boss to the bottom of the high rib groove.

3. The liquid wick mold according to claim 2, characterized in that: The number of the low rib grooves on the top of the main boss is not less than 2.

4. The liquid wick mold according to claim 3, characterized in that: The cross-sectional shapes of the high rib groove, the low rib groove, the main boss and the secondary boss are at least one of rectangular, V-shaped and arc-shaped.

5. The liquid wick mold according to claim 4, characterized in that: The width of the main boss is in the sub-millimeter level, and the width of the secondary boss is in the micrometer level.

6. The liquid absorbent core mold according to any one of claims 1 to 5, characterized in that: The absorbent core mold also includes a plurality of positioning channels and a plurality of plug-ins; the positioning channels penetrate the accommodating portion and the absorbent core reverse structure; the slices and the accommodating portion are provided with positioning through holes of the same shape and size at corresponding positions; the positioning through holes at corresponding positions of the slices and the accommodating portion are combined to form the positioning channels; the different positioning channels are parallel to each other; the plug-ins are adapted to the positioning channels in shape and size, and penetrate and are fixed in the positioning channels.

7. The liquid wick mold according to claim 6, characterized in that: The accommodating portion includes an accommodating bottom plate and a rectangular frame, and the rectangular frame is fixed on the accommodating bottom plate; the rectangular frame includes two first height-fixing plates arranged parallel to each other and two second height-fixing plates arranged parallel to each other, and the first height-fixing plates and the second height-fixing plates are arranged perpendicular to each other; the first height-fixing plate is provided with the positioning through hole, and the slice is arranged in the accommodating portion parallel to the first height-fixing plate according to design requirements.

8. A method for preparing a liquid wick mold according to any one of claims 1 to 7, characterized in that: The following steps are involved: A1: Designing a mold for the liquid-absorbing core, specifically including the height and shape of the accommodating portion, the number, width, height and shape of the main boss and the secondary boss, and the number, depth, width and shape of the high rib groove and the low rib groove, to obtain a mold model; A2: preparing the receiving portion according to the mold model; A3: According to the reverse structure design of the absorbent core in the mold model, the thickness of each slice when sliced ​​along the extension direction of the high rib groove is obtained, and a slice model of each slice is obtained, and the slice conforming to the slice model is processed and prepared or selected; A4: According to the mold model, the slices of step A3 are vertically arranged in the receiving portion in the same direction to form the absorbent core mold.

9. The method for preparing a liquid wick mold according to claim 8, characterized in that: The processing method of step A3 is: forming the slice model by laser cutting to achieve the micron level requirement of the slice width.

10. A method for preparing a wick based on the wick mold according to any one of claims 1 to 7, characterized in that: The following steps are involved: The powder material for preparing the liquid absorbent core is laid on the upper surface of the liquid absorbent core mold, flattened with a scraper, and placed in a high-temperature atmosphere furnace for high-temperature sintering to obtain a liquid absorbent core rough blank; the liquid absorbent core rough blank is placed in a corrosive solution for etching to form a surface nanostructure to obtain the desired liquid absorbent core.

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