Jig assembly and three-dimensional vapor chamber case structure manufactured thereby

Abstract

A jig assembly includes a base, a template, at least one first positioning member, and at least one center rod. The base has a bearing surface and at least one channel for accommodating a tube to be processed. The template has a first surface and a second surface. The first surface has a powder injection groove, and the second surface has a mold cavity, with the powder injection groove and the mold cavity communicating with each other. The template covers the plate to be processed placed on the base with its second surface and has at least one first through hole in the area corresponding to the mold cavity, the first through hole being aligned with the opening of the channel. The first positioning member is inserted into the first through hole. The center rod extends through the first positioning member into the tube housed in the channel. The outer diameter of the center rod is smaller than the inner diameter of the tube, so that a powder-filling gap is formed between the center rod and the inner wall of the tube for filling with powder material. The jig assembly of the present invention forms a molding space between the mold cavity of the template and the workpiece, and positions the center rod in the tube through the first positioning member to form a powder-filling gap, thereby achieving one-time forming of the capillary structure of the tube and the plate.

Description

Technical Field

[0001] The present invention relates to a jig assembly, and more particularly, to a jig assembly for preparing a three-dimensional heat exchanger capillary structure and a three-dimensional heat exchanger shell structure prepared by the jig assembly. Prior Technology

[0002] As the performance of electronic devices continues to improve, their heat generation also increases. Three-dimensional vapor chambers, with their superior heat dissipation performance, have become one of the most efficient thermal management solutions and are widely used in various high heat flux density scenarios. The heat dissipation efficiency of a three-dimensional vapor chamber largely depends on the design and fabrication of its internal capillary structure. The core function of the capillary structure is to promote the uniform distribution and efficient recirculation of the working fluid, thereby achieving stable and efficient heat conduction.

[0003] Traditional methods for manufacturing three-dimensional vapor chambers typically involve separately fabricating the capillary structures of the tube and the vapor chamber itself, and then joining them together through welding or bonding. However, this method faces numerous challenges.

[0004] First, because the capillary structures of the tube body and the vapor chamber are manufactured separately, seamless connection is difficult to achieve during the bonding process. Discontinuous regions often form between the capillary structures, significantly reducing the reflux efficiency of the working fluid. Second, bonding the capillary structures requires processes such as welding, bonding, or secondary sintering. These processes are not only cumbersome but may also damage the capillary structures, further reducing their performance. Furthermore, the materials used in welding or bonding may increase the thermal resistance at the joint, thereby reducing the overall heat transfer efficiency and directly affecting the heat dissipation performance of the three-dimensional vapor chamber.

[0005] Therefore, how to achieve one-time molding of the capillary structure of the tube and the heat exchanger plate in a three-dimensional heat exchanger, and ensure the integrity of the capillary structure in order to improve the reflux efficiency of the working fluid, has become a key issue that urgently needs to be addressed in the field of three-dimensional heat exchangers. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a jig assembly and the resulting three-dimensional heat spreader shell structure. This invention utilizes a mold cavity formed by the template and the workpiece to be processed to create a molding space. A first positioning element accurately positions a central rod within the center of the workpiece's tube, creating a uniform powder-filling gap between the central rod and the inner wall of the tube, thus achieving powder material filling. The powder material can be injected through the template's powder injection groove, filling the molding space formed by the mold cavity and the workpiece, as well as the gaps in the tube not occupied by the central rod. Through this process, a continuous and uninterrupted three-dimensional capillary structure is formed on the surface of the workpiece and the inner wall of the tube via a sintering process, achieving a one-time integral molding of the capillary structure on both the surface of the workpiece and the inner wall of the tube. This technical solution ensures the continuity and consistency of the capillary structure, improves the return efficiency of the working fluid, simplifies the manufacturing process, and enhances the heat dissipation performance and product reliability of the three-dimensional heat spreader.

[0007] The fixture assembly of the first embodiment of the present invention includes a base, a template, at least one first positioning member, and at least one center rod. The base has a bearing surface for supporting a workpiece plate. The base has at least one channel for accommodating a workpiece tube. The channel has an opening on the bearing surface. The template has a first surface and a second surface disposed opposite to each other. The first surface has a powder injection groove, and the second surface has a mold cavity. The bottom of the powder injection groove has a powder injection port, and the powder injection groove communicates with the mold cavity through the powder injection port. The template is configured to cover the workpiece plate placed on the base with its second surface, and has at least one first through hole in the area corresponding to the mold cavity. The first through hole is aligned with the opening of the channel, allowing the center rod to pass through the template and extend into the interior of the tube. The first positioning member has a through hole and is detachably inserted into the first through hole of the template. The center rod passes through the first positioning member in the first through hole of the template and extends into the interior of the tube accommodated in the channel. The outer diameter of the center rod is smaller than the inner diameter of the tube. The center rod is positioned at the center of the tube by the first positioning member, so that a powder-filling gap is formed between the center rod and the inner wall of the tube for filling powder material.

[0008] This invention, through the aforementioned technical solution, utilizes a first positioning element to accurately position the central rod at the center of the tube body, creating a uniform powder-filling gap between the central rod and the inner wall of the tube. The molding space formed by the mold cavity of the template and the workpiece allows for the uniform filling of powder material on the surface of the workpiece plate and the inner wall of the tube. This achieves a one-time integral molding of the capillary structure of the tube body and the capillary structure of the plate, solving problems such as incomplete capillary structure overlap, cumbersome manufacturing processes, and capillary structure damage in traditional three-dimensional heat spreaders, significantly improving the return flow efficiency of the working fluid. Simultaneously, it simplifies the process steps and further improves the heat dissipation performance and product reliability of the three-dimensional heat spreader. Simple Explanation of the Diagram

[0009] Figure 1 is a perspective view of the jig assembly according to the first embodiment of the present invention; Figure 2A is an exploded view of the jig assembly and the workpiece thereon according to the first embodiment of the present invention; Figure 2B is a schematic diagram of the fixture assembly and workpiece shown in Figure 2A from another perspective; Figure 3 is a cross-sectional schematic diagram of the jig assembly and the workpiece thereon in the first embodiment of the present invention before the capillary structure is prepared; Figure 4 is a three-dimensional schematic diagram of the workpiece after the three-dimensional capillary structure preparation of the first embodiment of the present invention; Figure 5 is a perspective view of the jig assembly according to the second embodiment of the present invention; Figure 6A is an exploded view of the fixture assembly and the workpiece thereon according to the second embodiment of the present invention; Figure 6B is a schematic diagram of the fixture assembly and workpiece shown in Figure 6A from another perspective; Figure 7 is a cross-sectional schematic diagram of the workpiece in the second embodiment of the present invention before the capillary structure is prepared on the plate and tube. Figure 8 is a cross-sectional view of the fixture assembly and the workpiece thereon before powder injection according to the second embodiment of the present invention; Figure 9 is a cross-sectional schematic diagram of the fixture assembly and the workpiece thereon after powder injection according to the second embodiment of the present invention; and Figure 10 is a three-dimensional schematic diagram of the workpiece after the three-dimensional capillary structure preparation of the second embodiment of the present invention. Implementation

[0010] The above-mentioned objectives of the present invention and its structural and functional characteristics will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0011] Please refer to Figures 1, 2A, and 2B. The fixture assembly 1 of the first embodiment of the present invention includes a base 20, a template 30, at least one first positioning member 40, at least one center rod 50, and a cover plate 70.

[0012] As shown in Figures 2A and 2B, in this embodiment, the base 20 has a bearing surface 200 for supporting the plate 101 of the workpiece. At least two (e.g., three) second positioning posts 200C may be provided on the bearing surface 200 for engaging with at least two (e.g., three) second positioning holes 30121 of the frame portion 3012 of the template 30, so that the template 30 can be stably and accurately positioned on the base 20. At least one vertical channel 201 is provided inside the base 20. The channel 201 has an opening 201P on the bearing surface 200. The channel 201 is used to accommodate at least one tube 102 of the workpiece 10.

[0013] As shown in Figure 2B, in this embodiment, the channel 201 also has another opening located at the bottom of the base 20, meaning the channel 201 can be a through groove penetrating the base 20. However, in other embodiments, the channel 201 may have only one opening 201P on the bearing surface 200 of the base, with the bottom being a closed design. The cross-sectional shape of the channel 201 is circular to match the outer diameter of the tube 102, ensuring that the tube 102 can be fit comfortably inside it. However, the cross-sectional shape of the channel 201 is not limited to a circle. Depending on different application requirements or manufacturing process requirements, its cross-sectional shape can also be designed as square, polygonal, or irregular shapes with curvature, etc., to adapt to specific structural or functional requirements.

[0014] As shown in Figures 2A and 2B, the template 30 has a first surface 301 and a second surface 302 disposed opposite to each other. The first surface 301 may have a recess 3011 and a frame portion 3012 surrounding the recess 3011, and the second surface 302 has a cavity 302C recessed therein. A powder injection groove 3010 is provided on the surface of the recess 3011, and a powder injection port 3010P is provided at the bottom of the powder injection groove 3010. The powder injection groove 3010 is connected to the cavity 302C through the powder injection port 3010P. In this embodiment, at least two (e.g., three) first positioning holes 30120 are provided on the long side of the frame portion 3012, and at least two (e.g., three) second positioning holes 30121 are provided on the short side of the frame portion 3012. The first positioning holes 30120 are used to cooperate with the first positioning post 70C on the cover plate 70 to ensure that the cover plate 70 can be accurately positioned on the template 30. The second positioning hole 30121 is used to cooperate with the second positioning post 200C on the bearing surface 200 of the base 20 to achieve stable installation and precise positioning of the template 30 and the base 20. Furthermore, the template 30 has at least one first through hole 303 in the area corresponding to the mold cavity 302C. This first through hole 303 corresponds (aligns) with the opening 201P of the channel 201 on the base 20, allowing the center rod 50 to pass through the template 30 and extend into the tube 102 housed in the channel 201. Simultaneously, the first through hole 303 also allows the first positioning member 40 to be securely inserted therein, thereby indirectly and accurately positioning the center rod 50 at the center of the tube 102. When the template 30 covers the workpiece 10 of the base 20 with its second surface 302, the template 30, through its mold cavity 302C, can form a molding space with the workpiece 10 for subsequent filling material and capillary structure molding.

[0015] Please refer to Figure 3 and Figure 4.

[0016] As shown in Figure 3, the workpiece plate 101 is placed on the base 20, while the workpiece tube 102 is accommodated in the channel 201 of the base 20. In addition, the template 30 covers the workpiece plate 101 placed on the base 20 with its second surface 302 having a cavity 302C.

[0017] The first positioning element 40 is detachably inserted into the first through hole 303 of the template 30. In this embodiment, the first positioning element 40 is a sleeve, which includes a cylindrical section 401 and a flange section 402, and is provided with a through hole 400 penetrating the cylindrical section 401 and the flange section 402. The through hole 400 is aligned with the opening 201P of the channel 201, and the inner diameter of the through hole 400 is smaller than the inner diameter of the tube 102. The cylindrical section 401 is inserted into the first through hole 303 of the template 30, and its outer diameter matches the inner diameter of the first through hole 303, ensuring that the first positioning element 40 can be stably installed in the first through hole 303; the flange section 402 is engaged on the first surface 301 of the template 30, providing support. In addition, the inner diameter of the column section 401 matches the outer diameter of the central rod 50, ensuring that the central rod 50 can be accurately inserted and positioned in the center position inside the tube 102 under the guidance of the first positioning member 40, thereby ensuring the symmetry of the powder filling gap.

[0018] The center rod 50 is used to pass through the perforation 400 of the first positioning member 40 inserted into the first through hole 303 of the template 30, and further extend into the interior of the tube 102. The cylindrical cross-sectional shape of the center rod 50 matches the cross-sectional shape of the perforation 400 of the first positioning member 40. In this embodiment, both cross-sectional shapes are circular and similar in size, ensuring that the center rod 50 can pass through the first positioning member 40 and remain stably positioned, avoiding displacement of the center rod 50. The outer diameter of the center rod 50 is smaller than the inner diameter of the tube 102, so that the center rod 50 can form a uniform annular gap with the inner wall of the tube 102. This gap is used to fill powder material, such as copper metal powder, to achieve subsequent capillary structure formation.

[0019] In this embodiment, the cylindrical structure of the central rod 50 is cylindrical. In other embodiments, to adapt to different needs, the cross-sectional shape of the central rod 50 and the through hole 400 of the first positioning member 40 can also be designed as square, polygonal, or irregular shape with arc, etc., to adapt to different needs.

[0020] The cover plate 70 is provided with at least one third through hole 701 corresponding to (aligned with) the first through hole 303 of the template 30, allowing the center rod 50 to pass through the third through hole 701 of the cover plate 70 and the first through hole 303 of the template 30 when the cover plate 70 is closed, and extend into the interior of the tube body 102. At the same time, the cover plate 70 is also provided with at least one fourth through hole 702 corresponding to (aligned with) the powder injection groove 3010 of the template 30, so that powder material can be injected from the cover plate 70 into the powder injection groove 3010 of the template 30.

[0021] Furthermore, the cover plate 70 has at least two (e.g., two or three) first positioning posts 70C on its surface facing the base 20. These first positioning posts 70C are used to engage with the first positioning holes 30120 on the frame portion 3012 of the template 30, thereby achieving a stable installation and precise alignment between the cover plate 70 and the template 30. The cover plate 70 can also effectively guide and protect related components.

[0022] Powder material can be injected from the powder injection groove 3010 on the first surface 301 of the template 30, and filled into the space formed by the mold cavity 302C and the plate 101 of the workpiece through the powder injection port 3010P, and further filled into the gap between the tube 102 and the center rod 50. Alternatively, when a cover plate 70 is provided, powder material can also be injected into the powder injection groove 3010 through the fourth through hole 702 of the cover plate 70, and further filled into the gap between the mold cavity 302C and the tube 102 not occupied by the center rod 50 through the powder injection port 3010P. This powder material fills the first surface 101U of the plate 101 of the workpiece 10 and is evenly distributed on the inner wall of the tube 102. Then, under a high-temperature sintering process of approximately 700°C to 900°C, a continuous and complete three-dimensional capillary structure 103 can be formed in one step (integral molding), ensuring the stability of the capillary structure and efficient thermal conductivity.

[0023] As shown in Figure 4, after the workpiece 10 undergoes the above-described process and high-temperature sintering, a three-dimensional heat spreader shell structure 12 is formed. This three-dimensional heat spreader shell structure 12 can be combined with another corresponding shell structure (not shown) through, for example, a welding process to form a complete three-dimensional heat spreader (not shown). The three-dimensional heat spreader shell structure 12 includes a plate 101, at least one tube 102, and a three-dimensional capillary structure 103. The plate 101 has a first surface 101U and a second surface 101B disposed opposite to each other, and is provided with at least one first opening 101P. One end of the tube 102 is disposed on the second surface 101B of the plate 101 and communicates with it through the first opening 101P of the plate 101. The other end of the tube 102 is a closed structure, thereby forming a working fluid channel (not shown) of the three-dimensional heat spreader together with the plate 101 and the corresponding shell structure.

[0024] The three-dimensional capillary structure 103 covers the first surface 101U of the plate 101 and extends continuously to the inner wall surface of the tube 102, realizing a continuous and complete three-dimensional capillary structure, which effectively improves the heat dissipation effect of the overall structure of the three-dimensional heat exchanger.

[0025] In the first embodiment of this invention, the central rod 50 is precisely positioned at the center of the tube body 102 using the first positioning member 40, ensuring a uniform powder-filling gap is formed between the central rod 50 and the inner wall of the tube body 102. Simultaneously, the molding space formed by the mold cavity 302C of the template 30 and the workpiece 10 enables precise filling of the powder material, and the overall capillary structure is formed in one sintering process. This technical solution effectively solves the problems of incomplete capillary structure overlap, cumbersome manufacturing process, and easy damage to the capillary structure in traditional three-dimensional heat spreaders, significantly improving the return efficiency of the working fluid, simplifying the manufacturing process, and significantly improving heat dissipation performance and product reliability.

[0026] Please refer to Figures 5, 6A, 6B, and 7.

[0027] As shown in Figures 5 and 6A, compared with the jig assembly 1 of the first embodiment, the jig assembly 1' of the second embodiment of the present invention includes, in addition to a base 20', a template 30', a cover plate 70', at least one first positioning member 40 and at least one center rod 50, at least one second positioning member 40 and at least one interference rod 60. Furthermore, the base 20' is provided with at least one bent tube groove 202. The bent tube groove 202 has an opening 202P located on the bearing surface 200' of the base 20', and is used to accommodate at least one bent tube body 114 of the workpiece 11, thereby adapting to more complex workpiece shape requirements.

[0028] As shown in Figures 6A and 6B, the template 30' of this embodiment has a second surface 302' with an annular wall 302W, which forms a mold cavity 302C'. The powder injection groove 3010' communicates with the mold cavity 302C' through the powder injection port 3010P'. The template 30' has at least one first through hole 303' and at least one second through hole 304' in the area corresponding to the mold cavity 302C'. The first through hole 303' corresponds to (aligns with) the opening 201P of the channel 201', and the second through hole 304' corresponds to (aligns with) the opening 202P of the bent pipe through groove 202. The template 30' is used to cover the workpiece 11 placed on the base 20' with its second surface 302'.

[0029] The differences between the second embodiment and the first embodiment of the present invention will be described in detail below. The structure and configuration of the remaining components are the same as those in the first embodiment. The relevant details have been described in the foregoing description and will not be repeated here.

[0030] The fixture assembly 1' of the second embodiment of the present invention is used to prepare a three-dimensional capillary structure on a workpiece 11.

[0031] As shown in Figure 7, the workpiece 11 includes a plate 111 and at least one tube 112 and at least one bent tube 114 disposed on the plate 111. The plate 111 has a first surface 111U and a second surface 111B disposed opposite to each other, and is provided with at least one first opening 111P and at least one second opening 112P. The tube 112 is disposed on the second surface 111B of the plate 111 and communicates with it through the first opening 111P of the plate 111. The bent tube 114 is also disposed on the second surface 111B of the plate 111 and communicates with it through the second opening 112P of the plate 111. The first surface 111U of the plate 111 and the interior of the tube 112 have not yet formed capillary structures, while the inner wall of the bent tube 114 has a capillary structure 115 pre-formed thereon. In detail, the fixture assembly 1' is used to form a continuous three-dimensional capillary structure on the first surface 111U of the plate 111 of the workpiece 11 and the inner wall of the tube 112 in one go, and to seamlessly connect (overlap) with the capillary structure 115 that has been pre-set on the inner wall of the bent tube 114.

[0032] Please refer to Figures 8 and 9.

[0033] As shown in Figures 8 and 9, the second positioning member 40 is inserted into the second through hole 304' of the template 30'. Since the inner wall of the bent tube 114 has a pre-set capillary structure 115, the interference rod 60 is needed to prevent the powder material from entering the interior of the bent tube 114 during the preparation process.

[0034] In this embodiment, the interference rod 60 may be, for example, a tapered component having a first end 601 and a second end 602. The interference rod 60 gradually tapers from the first end 601 to the second end 602, forming a conical structure. The outer diameter of the first end 601 of the interference rod 60 is larger than the inner diameter of the cylindrical section 401 of the second positioning member 40, allowing it to be engaged in the second positioning member 40. The outer diameter of the second end 602 of the interference rod 60 is smaller than the inner diameter of the cylindrical section 401 of the second positioning member 40, and smaller than the inner diameter of the bent tube 114 with the capillary structure 115, allowing it to pass through the cylindrical section 401 of the second positioning member 40 and enter the interior of the bent tube 114.

[0035] The interference rod 60 is configured to pass through the perforation 400 of the second positioning member 40 inserted into the second through hole 304' of the template 30' and extend into the interior of the bent tube 114. Due to its conical structure, the section between the first end 601 and the second end 602 of the interference rod 60 can enter the interior of the bent tube 114. The outer diameter of this section matches the inner diameter of the bent tube 114 with the pre-set capillary structure 115, thereby sealing (plugging) the area inside the bent tube 114 where the capillary structure 115 has been set, thus effectively preventing powder material from entering the interior of the bent tube 114, while allowing powder material to be laid in the peripheral area where the bent tube 114 and the plate 111 have not yet been set with capillary structure. Through this design, the newly prepared three-dimensional capillary structure 113 can be seamlessly connected with the capillary structure 115 pre-set on the inner wall of the bent tube 114, thereby ensuring the continuity and integrity of the capillary structure and further improving the overall performance of the structure.

[0036] Please refer to Figure 10.

[0037] As shown in Figure 10, after the above-mentioned process and high-temperature sintering, the workpiece 11 forms a three-dimensional heat exchanger shell structure 13. The three-dimensional heat exchanger shell structure 13 includes a plate 111, at least one tube 112, at least one bent tube 114, and a three-dimensional capillary structure 113.

[0038] The plate 111 has a first surface 111U and a second surface 111B disposed opposite to each other, and is provided with at least one first opening 111P and at least one second opening 112P. One end of the tube 112 is disposed on the second surface 111B of the plate 111 and communicates with it through the first opening 111P of the plate 111, and the other end of the tube 112 is a closed structure; one end of the bent tube 114 is also disposed on the second surface 111B of the plate 111 and communicates with it through the second opening 112P of the plate 111, and the other end of the bent tube 114 is also a closed structure, so that it can together with the plate 111 and the corresponding shell structure (not shown in the figure) form the working fluid channel of the three-dimensional heat exchanger (not shown in the figure).

[0039] The three-dimensional capillary structure 113 covers the first surface 111U of the plate 111 and extends seamlessly to the inner wall surface of the tube 112. At the same time, it is precisely connected with the capillary structure pre-set on the inner wall of the bent tube 114 to realize a continuous and complete three-dimensional capillary structure 113, which effectively improves the overall heat conduction performance and temperature uniformity, thereby meeting the requirements of efficient heat dissipation and significantly enhancing the functional reliability of the product.

[0040] The second embodiment of the present invention, through the above-described technical solution, not only uses the first positioning member 40 to precisely position the center rod 50 at the center of the tube body 112, ensuring a uniform powder-filling gap between the center rod 50 and the inner wall of the tube body 112, and achieves precise filling of powder material between the inner wall of the tube body 112 and the mold cavity 302C' defined by the mold cavity 30 of the template 30 and the workpiece 11, but also further utilizes the conical structure of the interference rod 60 to partially insert it into the bent tube body 114, which has a pre-set capillary structure 115. Through the contact between the interference rod 60 and the capillary structure 115 on the inner wall of the bent tube body 114, an interference effect is generated, preventing the powder-filling material from entering the interior of the bent tube body 114, precisely limiting it to the designed area, and avoiding secondary powder filling and sintering of the capillary structure 115. Meanwhile, this technical solution achieves seamless connection between the newly prepared three-dimensional capillary structure 113 and the pre-set capillary structure 115 on the inner wall of the bent tube 114, effectively improving the integrity and continuity of the capillary structure and further enhancing the heat transfer performance and uniformity of the overall structure.

[0041] The present invention has been described in detail above. However, the above description is only one preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should still fall within the patent coverage of the present invention.

[0042] 1,1': Fixture set 10, 11: Workpiece 12,13: Three-dimensional heat exchanger shell structure 103, 113: Three-dimensional capillary structure 101,111: plate body 102,112: Pipe body 114: Bending pipe body 115: Capillary structure of bent tube body 20,20': Base 200,200': Bearing surface 200C: Second positioning post 201,201': Channel 201P: Channel opening 202: Bend through groove 202P: Opening of the bend in the through groove 30,30': Template 301: The first surface of the template 3011: concave part 3012: Frame 30120: First positioning hole 30121: Second positioning hole 302, 302': The second surface of the template 3010, 3010': Powder Injection Tank 3010P, 3010P': Powder Inlet 302C: Mold cavity 302C': Mold cavity 302W: Circumferential Wall 303, 303': The first through hole of the template 304, 304': The second through hole of the template 40: First positioning component / Second positioning component 400: Perforation 401: Columnar segment 402: Flange section 50: Center bar 60: Interference rod 70,70': Cover plate 70C: First positioning post 701: Third through hole 702: Fourth through hole 601: First end 602: Second end 101P, 111P: The first opening of the plate 112P: The second opening of the plate 101U, 111U: The first surface of the plate 101B, 111B: The second surface of the plate

Claims

1. A jig assembly for forming a three-dimensional capillary structure on a workpiece having a plate and at least one tube disposed on the plate, the jig assembly comprising: A base having a bearing surface, the base having at least one channel having an opening on the bearing surface; A template has a first surface and a second surface disposed opposite to each other. The first surface has a powder injection groove, and the second surface has a mold cavity. The template has at least one first through hole in the area corresponding to the mold cavity. The first through hole corresponds to the opening of the channel. The template is used to cover the workpiece placed on the base with its second surface. At least one first positioning member has a through hole and is detachably inserted into the first through hole. At least one center rod is used to pass through the first positioning member inserted into the first through hole and extend into the interior of the tube body housed in the channel. The outer diameter of the center rod is smaller than the inner diameter of the tube body so that a gap is formed between the center rod and the inner wall of the tube body for filling a material.

2. The fixture assembly as described in claim 1, wherein, The bottom of the powder injection tank is provided with a powder injection port, and the powder injection tank is connected to the mold cavity through the powder injection port.

3. The fixture assembly as described in claim 1, wherein, The first surface of the template has a recess and a frame surrounding the recess. The powder injection groove is disposed on the surface of the recess, and the frame has at least two first positioning holes and at least two second positioning holes.

4. The fixture assembly as described in claim 3 further includes a cover plate for covering the template, the cover plate having at least one third through hole corresponding to the first through hole and one fourth through hole corresponding to the powder injection groove, and the cover plate having at least two first positioning posts for engaging with at least two first positioning holes of the frame portion.

5. The fixture assembly as described in claim 3, wherein, The bearing surface is provided with at least two second positioning posts for engaging with at least two second positioning holes in the frame.

6. The fixture assembly as described in claim 1, wherein, The first positioning element includes a flange section and a cylindrical section, the through hole passing through the flange section and the cylindrical section, the cylindrical section being inserted into the first through hole of the template, and the flange section being engaged with the first surface of the template.

7. The fixture assembly as described in claim 6, wherein, The outer diameter of the column segment matches the inner diameter of the first through hole of the template, and the inner diameter of the column segment matches the outer diameter of the central rod.

8. A jig assembly for forming a three-dimensional capillary structure on a workpiece having a plate and at least one tube and at least one bent tube disposed on the plate, the inner wall of the bent tube being provided with a capillary structure, the jig assembly comprising: A base having a bearing surface, the base having at least one channel and at least one curved through groove, the channel and the curved through groove each having an opening on the bearing surface; a template having a first surface and a second surface opposite to each other, the first surface having a powder injection groove, the second surface having a mold cavity, the template having at least one first through hole and at least one second through hole in the area corresponding to the mold cavity, the first through hole corresponding to the opening of the channel, the second through hole corresponding to the opening of the curved through groove, the template being used to cover the workpiece placed on the base with its second surface; at least one first positioning member and at least one second positioning member, the first positioning member and the second positioning member each having a through hole, and being detachably inserted into the first through hole and the second through hole respectively; At least one central rod, which is used to pass through the first positioning member inserted in the first through hole and extend into the bottom of the tube body housed in the channel. The outer diameter of the central rod is smaller than the inner diameter of the tube body, so that a gap is formed between the central rod and the inner wall of the tube body for filling a material; and at least one interference rod, which is a conical structure, used to pass through the second positioning member inserted in the second through hole and extend into the bent tube body housed in the bent tube through groove. The interference rod contacts the capillary structure of the bent tube body through its conical structure to prevent the material from entering the interior of the bent tube body.

9. The fixture assembly as described in claim 8, wherein, The bottom of the powder injection groove is provided with a powder injection port, and the powder injection groove is connected to the mold cavity through the powder injection port.

10. The fixture assembly as described in claim 8, wherein, The second surface of the template is provided with an annular wall, which surrounds and forms the mold cavity.

11. The fixture assembly as described in claim 8, wherein, The first surface of the template has a recess and a frame surrounding the recess. The powder injection groove is disposed on the surface of the recess, and the frame has at least two first positioning holes and at least two second positioning holes.

12. The fixture assembly as claimed in claim 11 further includes a cover plate for covering the template, the cover plate having at least two first positioning posts for engaging with at least two first positioning holes in the frame portion.

13. The fixture assembly as described in claim 11, wherein, The bearing surface is provided with at least two second positioning posts for engaging with at least two second positioning holes in the frame.

14. The fixture assembly as described in claim 8, wherein, The second positioning element includes a flange section and a cylindrical section. The through hole passes through the flange section and the cylindrical section. The cylindrical section is used to be inserted into the second through hole of the template, and the flange section is used to be engaged on the first surface of the template.

15. The fixture assembly as described in claim 14, wherein, The outer diameter of the column section matches the inner diameter of the second through hole in the template.

16. A three-dimensional heat spreader shell structure prepared from the fixture assembly described in any one of claims 8 to 15, comprising: a plate having a first surface and a second surface disposed opposite to each other, the plate having at least one first opening; at least one tube having one end disposed on the second surface of the plate and communicating with it through the first opening of the plate, the other end of the tube being a closed structure; and a three-dimensional capillary structure disposed on the first surface of the plate and extending continuously to the inner wall surface of the tube through the first opening.

17. The three-dimensional heat spreader shell structure as described in claim 16 further includes at least one bent tube, the plate body is provided with at least one second opening, one end of the bent tube is disposed on the second surface of the plate body and communicates with it through the second opening of the plate body, and the other end of the bent tube body is a closed structure; the three-dimensional capillary structure is disposed on the first surface of the plate body, extends to the inner wall surface of the tube body through the first opening, and is connected to the capillary structure of the bent tube body through the second opening.

Images