An automatic edge-wrapping device for producing thermal conductive sheets

Abstract

This application discloses an automatic edge-wrapping device for producing thermal conductive sheets, relating to the technical field of edge-wrapping devices for thermal conductive sheets. The automatic edge-wrapping device for producing thermal conductive sheets includes: a worktable on which a pre-processing component and a post-processing component are arranged along a first direction; a placement component for carrying the thermal conductive sheet to be processed; the pre-processing component includes a support frame, on which a movable block movable along the first direction is provided, the movable block being provided with a pressing groove, and two first pressing units symmetrically arranged within the pressing groove, the first pressing units being used to attach high-temperature adhesive tape to the areas of the upper and lower sides of the thermal conductive sheet near the edge-wrapping sidewalls; the post-processing component includes a positioning plate, on which a second pressing unit is provided, the second pressing unit being used to attach high-temperature adhesive tape to the upper and lower sides of the thermal conductive sheet to be processed.

Description

Technical Field

[0001] This application relates to the technical field of heat-conducting sheet edge-wrapping devices, and in particular to an automatic edge-wrapping device for the production of heat-conducting sheets. Background Technology

[0002] Thermal pads are widely used in the heat dissipation management of electronic devices. They come in various materials, commonly including silicone-based, graphite-based, and metal-based types. Among them, metal thermal pads, represented by aluminum plates, are particularly prevalent in power modules, LED lighting, and power battery thermal management due to their high thermal conductivity, good structural strength, and controllable cost. For practical needs such as insulation protection, dustproofing, scratch prevention, and prevention of edge short circuits, a layer of high-temperature tape is usually wrapped around the edges of these aluminum plate thermal pads. This ensures that the thermal pad maintains its thermal conductivity while providing reliable insulation protection for its sides and the edges of its top and bottom surfaces.

[0003] Currently, the process of applying high-temperature tape to heat-conducting sheets still largely relies on manual labor. Operators first cut the tape to the required length, then manually press and apply the tape along the sidewalls and top and bottom surfaces of the heat-conducting sheet. This manual labor is arduous and inefficient. To improve efficiency, some mechanized edge-wrapping devices have emerged in the industry. Most of these devices employ a one-time pressing structure, attempting to simultaneously press the tape onto the sidewalls and top and bottom surfaces of the heat-conducting sheet at the same workstation. However, because the high-temperature tape needs to bend from the edge wall and extend to the top and bottom surfaces, a one-time overall pressing will cause uneven tensile stress on the tape at the bending corners. This can easily lead to wrinkles or curling at the bends, which in turn reduces the flatness and adhesion of the edge wrapping. Summary of the Invention

[0004] The main purpose of this application is to provide an automatic edge-wrapping device for the production of heat-conducting sheets, which aims to solve the technical problems of high labor intensity and low efficiency of existing manual edge-wrapping, as well as the technical problems of wrinkles, curling and poor adhesion of high-temperature tape caused by one-time pressing of existing mechanized devices.

[0005] To achieve the above objectives, this application provides an automatic edge-wrapping device for producing thermal conductive sheets, comprising: A worktable on which pre-processing components and post-processing components are arranged along a first direction; A placement component for carrying the heat-conducting sheet to be processed, the placement component being selectively movable to a position corresponding to the pre-processing component or the post-processing component; The pretreatment component includes a support frame, on which a movable block capable of moving along a first direction is provided. The movable block is provided with a pressing groove, which is used to attach the high-temperature tape to the edge sidewall of the heat-conducting sheet to be treated. Two first pressing units are symmetrically arranged in the pressing groove, which are used to attach the high-temperature tape to the areas of the upper and lower sides of the heat-conducting sheet near the edge sidewall. The post-processing component includes a positioning plate, on which a second pressing unit is provided that can move along a second direction. The second pressing unit is used to attach the high-temperature tape to the upper and lower sides of the heat-conducting sheet to be processed.

[0006] Optionally, the placement component is connected to a lead screw transmission system, which includes a servo motor, a lead screw, and a lead screw nut. The output shaft of the servo motor is connected to the lead screw, and the lead screw nut is sleeved on the lead screw and connected to the placement component.

[0007] Optionally, the upper surface of the placement component is a placement surface, which is used to place the heat-conducting sheet to be processed. The edge sidewall of the heat-conducting sheet to be processed protrudes from the sidewall of the placement component along the second direction. A negative pressure cavity is provided inside the placement component, and the negative pressure cavity is connected to a negative pressure generating device. The placement surface has a plurality of negative pressure holes communicating with the negative pressure cavity.

[0008] Optionally, the support frame includes a support plate disposed above the workbench, a first guide groove is provided through the support plate, a second guide groove is provided on the workbench with the same extension direction as the first guide groove, a moving rod is provided between the first guide groove and the second guide groove, and the moving block is sleeved on the moving rod.

[0009] Optionally, the first guide groove includes a first segment, a second segment, and a third segment connected in sequence. The first segment and the third segment both extend along a first direction. The distance between the first segment and the placement member is less than the distance between the third segment and the placement member. The second segment is an inclined connecting segment.

[0010] Optionally, the support frame further includes a limiting plate having a limiting groove extending in a second direction. The upper end of the moving rod is connected to a limiting block located in the limiting groove, and the limiting block is movable along the extension direction of the limiting groove. The support plate is also provided with a limiting rod extending in a first direction. The limiting plate has a limiting hole for cooperating with the limiting rod. The support plate is also provided with a rack extending in the first direction. A drive motor is provided on the limiting plate. A drive wheel that meshes with the rack is sleeved on the output shaft of the drive motor, so as to drive the limiting plate and the moving rod to move along the extension direction of the first guide groove through the drive motor.

[0011] Optionally, the movable block has a through groove for the movable rod to pass through, the length of the through groove along the second direction is greater than the outer diameter of the movable rod, the movable rod is fitted with baffles located at the upper and lower ends of the movable block, a spring groove is provided on the inner wall of the through groove on the side of the movable rod near the placement member, and a compression spring is provided between the spring groove and the movable rod.

[0012] Optionally, the first clamping unit includes a clamping rod, a positioning pin, and a clamping spring. The positioning pin is connected to the inner wall of the clamping groove. One end of the clamping rod is rotatably connected to the positioning pin, and the other end of the clamping rod is a free end. The clamping spring is disposed between the side of the clamping rod near the free end and the inner wall of the clamping groove.

[0013] Optionally, the width of the pressing groove gradually decreases along its depth direction, and the height of the bottom wall of the pressing groove away from the groove opening is greater than the edge height of the heat-conducting sheet to be processed.

[0014] Optionally, the second pressing unit includes a support plate, a push-pull rod, and elastic elements; the support plate is disposed on the positioning plate, the push-pull rod is disposed on the positioning plate, the telescopic end of the push-pull rod is connected to the support plate, two elastic elements are symmetrically disposed on the support plate, the two elastic elements are bent inward along opposite sides to form a pressing part, and a receiving space for accommodating the heat-conducting sheet to be processed is formed between the pressing parts of the two elastic elements. In the initial state, the distance between the pressing parts of the two elastic elements is less than the thickness of the heat-conducting sheet to be processed.

[0015] The beneficial effects that this application can achieve are: This application discloses an automatic edge-wrapping device for producing thermal conductive sheets. By arranging a pre-processing component and a post-processing component along a first direction on a worktable, and cooperating with a movable placement component, the thermal conductive sheets to be processed can be sequentially transferred to different processing stations, achieving automated flow of the edge-wrapping process. The moving block in the pre-processing component is equipped with a pressing groove, which accurately attaches high-temperature tape to the edge-wrapping sidewall of the thermal conductive sheet. Simultaneously, two symmetrically arranged first pressing units pre-attach the high-temperature tape to the upper and lower sides of the thermal conductive sheet near the edge-wrapping sidewall. This ensures reliable positioning and pre-compression of the tape in the sidewall and corner areas, effectively avoiding uneven stretching and concentrated stress caused by a one-time overall fold, thus preventing wrinkles or warping at bends and ensuring the flatness and bonding quality of the initial edge-wrapping section. It allows the bending stress of the tape to be released gradually within a controllable range, avoiding damage to the tape from sharp aluminum edges and improving the reliability of the edge-wrapping. The second pressing unit in the post-processing assembly moves along the second direction to fully re-attach the high-temperature tape to the upper and lower sides of the heat-conducting sheet, pressing the initially positioned tape flat and tightly onto the upper and lower surfaces, ultimately obtaining a finished edge-wrapped product with flat edges and no wrinkles. Attached Figure Description

[0016] Figure 1 This is a top view of the edge-binding device according to an embodiment of this application; Figure 2 This is a side view of the placement component in an embodiment of this application; Figure 3 This is a cross-sectional side view of the moving block and moving rod in an embodiment of this application; Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a top view of the support plate in an embodiment of this application. Figure 6 This is a side view of the second clamping unit according to an embodiment of this application.

[0017] The attached diagram is labeled as follows: 10-Workbench, 20-Placement component, 21-Placement surface, 22-Negative pressure hole, 23-Negative pressure chamber, 30-Screw drive system, 31-Servo motor, 32-Drive screw, 40-Support frame, 41-Support plate, 42-Moving block, 421-Through groove, 422-Spring groove, 423-Compression spring, 424-Baffle, 425-Pressure groove, 43-Moving rod, 44-Limit plate, 441-Limit block, 442-Limit groove, 4 5-Drive motor, 451-Drive wheel, 46-Rack, 47-Limit rod, 50-First clamping unit, 51-Positioning pin, 52-Clamping rod, 53-Clamping spring, 60-First guide groove, 61-First section, 62-Second section, 63-Third section, 70-Post-processing assembly, 71-Push-pull rod, 72-Positioning plate, 73-Bearing plate, 74-Elastic element, 741-Clamping part, 80-Heat-conducting sheet to be processed, 90-High-temperature tape.

[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] Example 1 Reference Figures 1-6 The first embodiment of this application provides an automatic edge-wrapping device for producing thermal conductive sheets, including: a workbench 10, on which pre-processing components and post-processing components 70 arranged along a first direction are disposed; the workbench 10 is the base of the entire device and adopts a horizontal platform structure. Figure 1 As shown, X represents the first direction, Y represents the second direction, and the first and second directions are perpendicular to each other. A pre-processing assembly and a post-processing assembly 70 are sequentially mounted on the upper surface of the worktable 10 along the first direction. The spacing between the pre-processing assembly and the post-processing assembly 70 must meet the travel requirements when the placement component 20 moves.

[0024] The placement component 20 is used to support the heat-conducting sheet 80 to be processed. The placement component 20 can be selectively moved to a position corresponding to either the pre-processing component or the post-processing component 70. The placement component 20 is a flat plate or clamp structure for supporting the heat-conducting sheet 80. The placement component 20 is slidably connected to the worktable 10 via a guide rail or lead screw mechanism and is equipped with an independent drive unit. The placement component 20 can move along a first direction to selectively move to a position corresponding to the pre-processing component, i.e., the first station, or to a position corresponding to the post-processing component 70, i.e., the second station.

[0025] The pretreatment assembly includes a support frame 40, on which a movable block 42 capable of moving along a first direction is provided. The movable block 42 is provided with a pressing groove 425, which is used to attach the high-temperature tape 90 to the edge sidewall of the heat-conducting sheet 80 to be treated. Two first pressing units 50 are symmetrically arranged in the pressing groove 425. The first pressing units 50 are used to attach the high-temperature tape 90 to the upper and lower sides of the heat-conducting sheet 80 near the edge sidewall. The pretreatment assembly is a processing unit located upstream in the first direction. The pretreatment assembly is used to initially attach the high-temperature tape 90 to the edge sidewall and the adjacent upper and lower side areas of the heat-conducting sheet 80 to be treated.

[0026] The post-processing assembly 70 includes a positioning plate 72, on which a second pressing unit movable in a second direction is disposed. The second pressing unit is used to attach the high-temperature tape 90 to the upper and lower sides of the heat-conducting sheet 80 to be processed. The post-processing assembly 70 is a processing unit located downstream in the first direction, and is used to complete the final pressing and flattening of the high-temperature tape 90 over a wider area of ​​the upper and lower surfaces of the heat-conducting sheet. It includes the positioning plate 72 and the second pressing unit.

[0027] In this embodiment, the heat-conducting sheet 80 to be processed is the workpiece to be processed. It is a heat-conducting interface material with a certain degree of flexibility, and it has an upper surface, a lower surface, and a sidewall connecting the upper and lower surfaces, i.e., the edge-wrapping sidewall. The high-temperature tape 90 is an auxiliary material for edge wrapping, usually a high-temperature resistant polyimide tape or similar material, which has a substrate layer and an adhesive layer. It is used to wrap the sidewall of the heat-conducting sheet and the upper and lower surface areas adjacent to the sidewall, and plays a role in insulation, dust prevention, or preventing damage to the edge of the heat-conducting sheet. Before edge wrapping is performed by the edge-wrapping device of this embodiment, The heat-conducting sheet 80 to be treated is fixed to the placement member 20 manually or mechanically, so that the end of the heat-conducting sheet 80 protrudes beyond the end of the placement member 20, that is, the side wall of the heat-conducting sheet 80 to be edged protrudes beyond the placement member 20, to facilitate subsequent edge-wrapping processing. A suitable length of high-temperature adhesive tape 90 is cut manually or using other equipment and attached to the edge-wrapping side wall of the heat-conducting sheet 80. At this time, the high-temperature adhesive tape 90 is in a straight state and has sufficient vertical allowance to be folded over the upper and lower surfaces of the heat-conducting sheet 80. It should be noted that the length of the high-temperature adhesive tape 90 can be slightly shorter than the edge-wrapping length, or it can be the same as the edge-wrapping length. In this embodiment, the heat-conducting sheet 80 is square in shape, and the edge-wrapping process is described using one side as an example. When multiple sides need to be edged, it is only necessary to repeatedly clamp and rotate the heat-conducting sheet 80.

[0028] The clamping groove 425 moves along the edge-sealing sidewall in the first direction with the moving block 42, continuously and dynamically clamping the tape along the edge of the heat-conducting sheet. This is particularly suitable for straight edge sealing of rectangular or other regular-shaped heat-conducting sheets, avoiding wrinkles or uneven local pressure that may occur during static pressing. The symmetrical clamping units simultaneously apply equal pressure to the upper and lower surfaces of the heat-conducting sheet, preventing bending, warping, or tape shifting caused by unilateral pressure, and ensuring the consistency of the edge sealing width. The complex edge sealing action is decomposed into two independent workstations: first, coarsely pressing the corners and near-sidewall areas, and then finely pressing the entire plane. This avoids the design difficulties of a single complex mechanism. Each workstation can be structurally optimized for its specific task, such as pre-processing focusing on contour following and post-processing focusing on large-area uniform pressure, improving the overall process reliability and edge sealing quality.

[0029] Example 2 Based on Embodiment 1, this embodiment provides an automatic edge-wrapping device for producing heat-conducting sheets, including: a placement component 20 connected to a lead screw transmission system 30, the lead screw transmission system 30 including a servo motor 31, a transmission lead screw 32, and a transmission lead screw nut, the output shaft of the servo motor 31 being connected to the transmission lead screw 32, the transmission lead screw nut being sleeved on the transmission lead screw 32, and the transmission lead screw nut being connected to the placement component 20.

[0030] Specifically, the servo motor 31 is an electric motor capable of precisely controlling its speed, angle, and torque. The output shaft of the servo motor 31 is directly connected to the transmission screw 32 via a coupling. The transmission screw 32 is a long rod-shaped part with helical grooves machined on its outer surface. The transmission nut is a nut with internal threads that mate with the transmission screw 32, sleeved on the transmission screw 32, and fixedly connected to the lower part of the placement component 20. The servo motor 31 drives the transmission screw 32 to rotate, and the transmission screw 32 drives the transmission nut to move linearly along the screw axis. The transmission nut directly drives the placement component 20 to move along the first direction on the worktable 10. The servo motor 31 receives commands from the controller and rotates according to the set speed, acceleration, and displacement. Through the screw-nut pair, the rotational motion is converted into linear displacement, enabling the placement component 20 to reciprocate between the first and second workstations corresponding to the pre-processing component and the post-processing component 70. The lead screw drive system 30 has reverse self-locking property, especially the trapezoidal lead screw. When the power is off or the system is stopped, the placement part 20 will not move accidentally due to external force, which improves the operational safety.

[0031] Optionally, the upper end surface of the placement component 20 is a placement surface 21, which is used to place the heat-conducting sheet 80 to be processed. The edge sidewall of the heat-conducting sheet 80 to be processed protrudes from the sidewall of the placement component 20 along the second direction. A negative pressure cavity 23 is provided inside the placement component 20. The negative pressure cavity 23 is connected to a negative pressure generating device. The placement surface 21 has a plurality of negative pressure holes 22 that communicate with the negative pressure cavity 23.

[0032] Specifically, the placement surface 21 is a flat reference surface on the top of the placement component 20, used to support the heat-conducting sheet 80 to be processed. The sidewall protruding along the second direction from the sidewall of the placement component 20 means that the sidewall of the heat-conducting sheet 80 to be processed extends beyond the edge of the placement component 20, so that the pressing groove 425 of the pretreatment assembly can enclose the sidewall without interference. The negative pressure chamber 23 is a closed cavity located inside the placement component 20, connected to a negative pressure generating device, such as a vacuum pump or vacuum generator, via a pipeline. Negative pressure holes 22 are small holes formed on the placement surface 21, communicating with the negative pressure chamber 23; several negative pressure holes 22 are evenly distributed or distributed as needed. The negative pressure generating device evacuates air, creating a pressure lower than atmospheric pressure within the negative pressure chamber 23, drawing in air from the negative pressure holes 22, thereby generating suction on the heat-conducting sheet on the placement surface 21. After the heat-conducting sheet is placed on the placement surface 21, the negative pressure generating device is turned on. The air in the negative pressure chamber 23 is extracted and firmly adsorbed onto the placement surface 21 through the negative pressure hole 22, preventing displacement or warping during subsequent movement and pressing. Using negative pressure adsorption instead of mechanical clamps avoids squeezing or scratching the edges or surface of the heat-conducting sheet.

[0033] Optionally, the support frame 40 includes a support plate 41 disposed above the workbench 10. A first guide groove 60 is disposed through the support plate 41. A second guide groove is disposed on the workbench 10 with the same extension direction as the first guide groove 60. A moving rod 43 is disposed between the first guide groove 60 and the second guide groove. A moving block 42 is sleeved on the moving rod 43.

[0034] Specifically, the support plate 41 is a horizontally positioned plate-shaped component located above the workbench 10 within the support frame 40. The first guide groove 60 is a groove-shaped structure that extends through the support plate 41 along its thickness direction, used to guide the movement trajectory of the moving rod 43. The second guide groove is a groove-shaped structure set on the surface of the workbench 10, and the second guide groove is aligned vertically with the first guide groove 60. The moving rod 43 is a vertical rigid rod, with its upper end passing through the first guide groove 60 and its lower end engaging with the second guide groove. The moving rod 43 passes through the moving block 42, which can slide axially along the moving rod 43, while the moving rod 43 can move horizontally along the trajectory of the first guide groove 60 and the second guide groove. The upper end of the moving rod 43 is constrained by the first guide groove 60, and the lower end is constrained by the second guide groove, forming a double-point guide to ensure that the moving part can accurately reproduce the trajectory shape of the guide groove when moving horizontally, thereby controlling the change in distance between the pressing groove 425 and the side wall of the heat-conducting plate.

[0035] Optionally, the first guide groove 60 includes a first segment 61, a second segment 62 and a third segment 63 connected in sequence. The first segment 61 and the third segment 63 both extend along a first direction. The distance between the first segment 61 and the placement member 20 is less than the distance between the third segment 63 and the placement member 20. The second segment 62 is an inclined connecting segment.

[0036] Specifically, the distance from the placement component 20 refers to the vertical distance between a point on the first guide groove 60 and the sidewall of the heat-conducting sheet on the placement component 20 in a direction perpendicular to the first direction. The distance from the first segment 61 to the placement component 20 is less than the distance from the third segment 63 to the placement component 20, meaning that the moving rod 43 and the moving component are closer to the sidewall of the heat-conducting sheet 80 to be processed in the first segment 61, and farther away in the third segment 63. The second segment 62 is an inclined connecting segment, which smoothly changes the distance between the moving rod 43 and the sidewall. In the initial state, the moving component is initially held in the third segment 63. When it is necessary to press the high-temperature tape 90, the moving rod 43 moves along the first direction, gradually approaching the placement component 20 after passing through the second segment 62.

[0037] Optionally, the support frame 40 further includes a limiting plate 44, which has a limiting groove 442 extending in a second direction. The upper end of the moving rod 43 is connected to a limiting block 441 located in the limiting groove 442. The limiting block 441 can move along the extension direction of the limiting groove 442. The support plate 41 is also provided with a limiting rod 47 extending in a first direction. The limiting plate 44 has a limiting hole for cooperating with the limiting rod 47. The support plate 41 is also provided with a rack 46 extending in the first direction. The limiting plate 44 is provided with a drive motor 45. The output shaft of the drive motor 45 is sleeved with a drive wheel 451 that meshes with the rack 46, so that the limiting plate 44 and the moving rod 43 can be driven to move along the extension direction of the first guide groove 60 by the drive motor 45.

[0038] Specifically, the limiting plate 44 is a movable plate-like structure installed on the upper end of the support plate 41. The limiting groove 442 is a straight groove formed on the limiting plate 44 and extending along the second direction. The first direction and the second direction are perpendicular to each other. The limiting block 441 is fixed to the upper end of the moving rod 43 and located in the limiting groove 442, and can only slide along the extension direction of the limiting groove 442, i.e., the second direction. The limiting rod 47 is fixed on the support plate 41 and extends along the first direction. The limiting hole is formed on the limiting plate 44 and slides with the limiting rod 47, so that the limiting plate 44 can only move along the first direction. The rack 46 is fixed on the support plate 41 and extends along the first direction. The drive motor 45 is installed on the limiting plate 44, and its output shaft is fitted with a drive wheel 451, which meshes with the rack 46. When the drive motor 45 rotates, the drive wheel 451 rolls along the rack 46, causing the entire limiting plate 44 to move along the extension direction of the limiting rod 47. Since the limiting block 441 at the upper end of the moving rod 43 is constrained within the limiting groove 442, the movement of the limiting plate 44 forces the moving rod 43 to displace in the second direction through the limiting groove 442. Simultaneously, the lower end of the moving rod 43 remains constrained by the second guide groove, thus forming a compound motion. The moving rod 43 remains vertical throughout its movement. A sliding groove can also be provided on the inner wall of the limiting groove 442, and a slider that cooperates with the sliding groove can be provided on the outer wall of the limiting block 441, thereby ensuring that the limiting block 441 is always within the limiting groove 442 and can provide guidance through the cooperation of the slider and the sliding groove.

[0039] Optionally, the movable block 42 has a through groove 421 for the movable rod 43 to pass through. The length of the through groove 421 along the second direction is greater than the outer diameter of the movable rod 43. The movable rod 43 is fitted with baffles 424 located at the upper and lower ends of the movable block 42. A spring groove 422 is provided on the inner wall of the through groove 421 on the side of the movable rod 43 near the placement member 20. A compression spring 423 is provided between the spring groove 422 and the movable rod 43.

[0040] Specifically, the through groove 421 is a through groove extending along the second direction on the movable part, through which the movable rod 43 passes. The length of the through groove 421 along the second direction is greater than the outer diameter of the movable rod 43, allowing the movable rod 43 a certain relative movement margin along the second direction within the through groove 421. Two annular or arc-shaped baffles 424 are fixed to the movable rod 43, located on the outer sides of the upper and lower end faces of the movable part, respectively, limiting the axial movement range of the movable block 42 on the movable rod 43. The spring groove 422 is a recess or annular groove formed on the inner wall of the through groove 421 near the placement part 20. A compression spring 423 is installed between the spring groove 422 and the movable rod 43, with one end abutting the bottom of the spring groove 422 and the other end abutting the side wall of the movable rod 43. The compression spring 423 always applies a thrust to the movable block 42 in the direction of the placement part 20. As the moving block 42 moves with the moving rod 43, if the clamping groove 425 is subjected to a reaction force from the side wall of the heat-conducting sheet, the compression spring 423 can be further compressed, causing the moving block 42 to produce a slight displacement relative to the moving rod 43, thereby adaptively adjusting the clamping force. The compression spring 423 provides a flexible clamping force, rather than a rigid contact, avoiding a surge in pressure caused by slight fluctuations in the thickness of the heat-conducting sheet or placement errors, thus preventing damage to the heat-conducting sheet or tape. Similarly, when the moving rod 43 moves from the third section 63 through the second section 62 to the first section 61, the moving block 42 gradually moves in the direction closer to the placement member 20, and the moving block 42 moves in the second direction to the side wall of the heat-conducting sheet 80 to be treated.

[0041] Optionally, the first clamping unit 50 includes a clamping rod 52, a positioning pin 51, and a clamping spring 53. The positioning pin 51 is connected to the inner wall of the clamping groove 425. One end of the clamping rod 52 is rotatably connected to the positioning pin 51, and the other end of the clamping rod 52 is a free end. The clamping spring 53 is disposed between the side of the clamping rod 52 near the free end and the inner wall of the clamping groove 425.

[0042] Specifically, the clamping rod 52 is a long, rigid rod used to directly contact and clamp the high-temperature tape 90. The locating pin 51 is fixed to the inner wall of the clamping groove 425, serving as the fulcrum for the rotation of the clamping rod 52. The clamping spring 53 is a helical spring or a spring sheet, with one end connected to or abutting against the part of the clamping rod 52 near its free end, and the other end connected to or abutting against the inner wall of the clamping groove 425. The clamping rod 52 can swing at a small angle around the locating pin 51, and the clamping spring 53 provides the elastic force that causes the free end of the clamping rod 52 to swing towards the center of the opening of the clamping groove 425.

[0043] As the moving part moves from the third section 63 to the first section 61 via the second section 62, and as it approaches the heat-conducting sheet 80 to be processed, the heat-conducting sheet 80 enters the clamping groove 425. The free end of the clamping rod 52 is then pressed against the upper and lower surfaces of the heat-conducting sheet by the clamping spring 53. Because the clamping rod 52 is rotatable, it can adapt to slight tilts or thickness changes on the surface of the heat-conducting sheet, maintaining line or surface contact pressure at all times. The swing-type structure of the clamping rod 52 allows it to automatically adapt to local unevenness or tilt on the surface of the heat-conducting sheet, ensuring full microscopic contact between the tape and the surface of the heat-conducting sheet and eliminating air bubbles. The high-temperature tape 90 can be pre-treated by the first pressing unit 50. The pressing groove 425 abuts against the edge side wall of the heat-conducting sheet 80 to be treated along the bottom wall of the groove depth. That is, the high-temperature tape 90 is attached to the edge side wall of the heat-conducting sheet 80 to be treated by the bottom wall of the pressing groove 425. The pressing rods 52 located on the upper and lower sides of the heat-conducting sheet 80 to be treated can further attach the high-temperature tape 90 to the area of ​​the upper and lower end faces of the heat-conducting sheet 80 near the edge side wall.

[0044] Optionally, the width of the pressing groove 425 gradually decreases along its depth direction, and the height of the bottom wall of the pressing groove 425 away from the groove opening is greater than the edge height of the heat-conducting sheet 80 to be processed.

[0045] Specifically, the width of the pressing groove 425 gradually decreases along its depth, meaning it becomes narrower from the opening to the bottom wall, resulting in a trapezoidal or V-shaped cross-section with a wide opening and a narrow bottom. When the edge of the heat-conducting sheet enters the pressing groove 425, it first enters the wider opening area, and then, as the pressing groove 425 moves, the heat-conducting sheet gradually enters the narrower depth of the groove. The sidewall of the heat-conducting sheet 80 to be treated can directly touch the bottom of the groove, allowing the high-temperature tape 90 to adhere to the edge sidewall of the heat-conducting sheet 80. The first pressing units 50 located on the upper and lower sides of the heat-conducting sheet 80 then adhere the high-temperature tape 90 to the areas near the edge sidewalls on both sides. The pressing groove 425 and the two first pressing units 50 serve to pre-press the high-temperature tape 90.

[0046] Optionally, the second pressing unit includes a bearing plate 73, a push-pull rod 71, and elastic elements 74. The bearing plate 73 is disposed on the positioning plate 72, the push-pull rod 71 is disposed on the positioning plate 72, the telescopic end of the push-pull rod 71 is connected to the bearing plate 73, and two elastic elements 74 are symmetrically disposed on the bearing plate 73. The two elastic elements 74 are bent inward along opposite sides to form a pressing part 741. A receiving space for accommodating the heat-conducting sheet 80 to be processed is formed between the pressing parts 741 of the two elastic elements 74. In the initial state, the distance between the pressing parts 741 of the two elastic elements 74 is less than the thickness of the heat-conducting sheet 80 to be processed.

[0047] Specifically, the support plate 73 is a movable flat plate mounted on the upper end of the positioning plate 72. The push-pull rod 71 can be a telescopic rod of a cylinder, electric cylinder, or hydraulic cylinder, with its fixed end connected to the positioning plate 72 or the frame, and its telescopic end connected to the support plate 73, used to drive the support plate 73 to move in the second direction. The elastic element 74 is an elastic sheet-like or plate-like component, with two elastic elements 74 fixed to the upper and lower sides of the support plate 73 respectively. The free ends of the two elastic elements 74 are bent inward to form a protruding arc-shaped or wedge-shaped clamping structure. The accommodating space is the gap formed between the clamping parts 741 of the two elastic elements 74, used to accommodate the heat-conducting sheet. When not under force, the gap between the two elastic elements 74 is smaller than the thickness of the heat-conducting sheet. The push-pull rod 71 pushes the support plate 73 to move, causing the heat-conducting sheet 80 to be processed to enter the accommodating space between the two elastic elements 74. Because the gap is smaller than the thickness of the heat-conducting sheet, the heat-conducting sheet will push the two elastic elements 74 outward, and the elastic elements 74 will generate a rebound force, thereby clamping the upper and lower surfaces of the heat-conducting sheet with a constant elastic pressure. The push-pull rod 71 can move back and forth along the second direction, so that the elastic elements 74 sweep and press the entire surface of the heat-conducting sheet. The deformation of the elastic element 74 is automatically adjusted with the thickness of the heat-conducting sheet, and the pressure generated is basically linearly related to the thickness deviation, but the change is gradual, which can adapt to heat-conducting sheets with different thickness tolerances without manual adjustment. The upper and lower elastic elements 74 apply pressure from both sides at the same time, and complete the pressing of the upper and lower surfaces in one go, which is highly efficient and symmetrical in force. The push-pull rod 71 drives the elastic element 74 to move along the second direction, realizing dynamic sweeping pressing of the entire surface of the heat-conducting sheet 80 to be treated, effectively expelling residual air, and the elastic element 74 can adapt to the micro-undulations of the surface, ensuring that the tape and the heat-conducting sheet are completely adhered. The second pressing unit can further press and adhere the high-temperature tape 90, so that the high-temperature tape 90 can be flatly attached to the upper and lower sides of the heat-conducting sheet 80 to be treated.

[0048] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An automatic edge-wrapping device for producing thermal conductive sheets, characterized in that, include: A worktable on which pre-processing components and post-processing components are arranged along a first direction; A placement component for carrying the heat-conducting sheet to be processed, the placement component being selectively movable to a position corresponding to the pre-processing component or the post-processing component; The pretreatment component includes a support frame, on which a movable block capable of moving along a first direction is provided. The movable block is provided with a pressing groove, which is used to attach the high-temperature tape to the edge sidewall of the heat-conducting sheet to be treated. Two first pressing units are symmetrically arranged in the pressing groove, which are used to attach the high-temperature tape to the areas of the upper and lower sides of the heat-conducting sheet near the edge sidewall. The post-processing component includes a positioning plate, on which a second pressing unit is provided that can move along a second direction. The second pressing unit is used to attach the high-temperature tape to the upper and lower sides of the heat-conducting sheet to be processed.

2. The automatic edge-wrapping device for producing thermal conductive sheets as described in claim 1, characterized in that, The placement component is connected to a lead screw transmission system, which includes a servo motor, a lead screw, and a lead screw nut. The output shaft of the servo motor is connected to the lead screw, and the lead screw nut is sleeved on the lead screw and connected to the placement component.

3. The automatic edge-wrapping device for producing thermal conductive sheets as described in claim 1, characterized in that, The upper surface of the placement component is a placement surface, which is used to place the heat-conducting sheet to be processed. The edge sidewall of the heat-conducting sheet to be processed protrudes from the sidewall of the placement component along the second direction. A negative pressure cavity is provided inside the placement component, and the negative pressure cavity is connected to a negative pressure generating device. The placement surface has a number of negative pressure holes that communicate with the negative pressure cavity.

4. The automatic edge-wrapping device for producing thermal conductive sheets as described in claim 1, characterized in that, The support frame includes a support plate disposed above the workbench, a first guide groove is provided through the support plate, a second guide groove is provided on the workbench with the same extension direction as the first guide groove, a moving rod is provided between the first guide groove and the second guide groove, and a moving block is sleeved on the moving rod.

5. The automatic edge-wrapping device for producing thermal conductive sheets as described in claim 4, characterized in that, The first guide groove includes a first segment, a second segment, and a third segment connected in sequence. The first segment and the third segment both extend along a first direction. The distance of the first segment from the placement member is less than the distance of the third segment from the placement member. The second segment is an inclined connecting segment.

6. The automatic edge-wrapping device for producing thermal conductive sheets as described in claim 5, characterized in that, The support frame further includes a limiting plate having a limiting groove extending in a second direction. The upper end of the moving rod is connected to a limiting block located in the limiting groove, and the limiting block can move along the extension direction of the limiting groove. The support plate is also provided with a limiting rod extending in a first direction. The limiting plate has a limiting hole for cooperating with the limiting rod. The support plate is also provided with a rack extending in the first direction. A drive motor is provided on the limiting plate. A drive wheel that meshes with the rack is sleeved on the output shaft of the drive motor, so as to drive the limiting plate and the moving rod to move along the extension direction of the first guide groove through the drive motor.

7. The automatic edge-wrapping device for producing thermal conductive sheets as described in claim 4, characterized in that, The movable block has a through groove for the movable rod to pass through. The length of the through groove along the second direction is greater than the outer diameter of the movable rod. The movable rod is fitted with baffles located at the upper and lower ends of the movable block. A spring groove is provided on the inner wall of the through groove on the side of the movable rod closer to the placement member. A compression spring is provided between the spring groove and the movable rod.

8. The automatic edge-wrapping device for producing thermal conductive sheets as described in claim 1, characterized in that, The first clamping unit includes a clamping rod, a positioning pin, and a clamping spring. The positioning pin is connected to the inner wall of the clamping groove. One end of the clamping rod is rotatably connected to the positioning pin, and the other end of the clamping rod is a free end. The clamping spring is disposed between the side of the clamping rod near the free end and the inner wall of the clamping groove.

9. The automatic edge-wrapping device for producing thermal conductive sheets as described in claim 8, characterized in that, The width of the pressing groove gradually decreases along its depth direction, and the height of the bottom wall of the pressing groove away from the groove opening is greater than the edge height of the heat-conducting sheet to be processed.

10. The automatic edge-wrapping device for producing thermal conductive sheets as described in claim 1, characterized in that, The second pressing unit includes a support plate, a push-pull rod, and elastic elements. The support plate is disposed on the positioning plate, and the push-pull rod is disposed on the positioning plate. The telescopic end of the push-pull rod is connected to the support plate. Two elastic elements are symmetrically disposed on the support plate. The two elastic elements are bent inward along opposite sides to form a pressing part. An accommodating space for accommodating the heat-conducting sheet to be processed is formed between the pressing parts of the two elastic elements. In the initial state, the distance between the pressing parts of the two elastic elements is less than the thickness of the heat-conducting sheet to be processed.

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