PCB heat-conducting silica gel paste profiling and cutting device

Abstract

The application discloses a PCB heat-conducting silica gel paste profiling and cutting device, which comprises a frame body with a double-layer structure, characterized in that the top layer of the frame body is provided with a first plane for placing a PCB and a positioning and profiling assembly for walking along a positioning and profiling path of the PCB, the bottom layer of the frame body is provided with a second plane for placing a PCB heat-conducting silica gel paste and a cutting assembly for cutting the PCB heat-conducting silica gel paste, and the frame body further provides a synchronous assembly for driving the cutting assembly to move along the moving path of the positioning and profiling assembly. The above structure is low in cost, is suitable for the production and assembly scene of small-batch prototype machines, adopts a double-layer synchronous structure, realizes precise cutting under the premise of realizing zero contact with the PCB card, and has the advantages of low cost and high precision.

Description

Technical Field

[0001] This invention relates to the technical field of cutting thermal conductive silicone pads for PCBs, and specifically to a PCB thermal conductive silicone pad contour cutting device. Background Technology

[0002] During the engineering prototype assembly stage of electronic devices, the PCB board has not yet reached mass production, and there is a possibility of redesigning the structure and PCB. At this time, it is not economical to design the die for the thermal conductive silicone pad. Therefore, there are two existing cutting methods for PCB thermal conductive silicone pads.

[0003] The first method involves manual cutting with scissors, which has the following adverse effects:

[0004] 1. Inaccurate cutting of thermal conductive silicone pads affects installation results; 2. Multiple cuttings are required, resulting in waste; 3. Incorrect cutting methods can damage PCB components; 4. Increases equipment installation time.

[0005] 2. The second method is visual cutting. Taking the patented automated cutting and pasting equipment and method for thermal conductive pads with patent number 202110326525.4 as an example, the detailed operation method is as follows:

[0006] Four different thicknesses of thermal pads and the PCB board or heat sink to which the thermal pads are to be applied are placed on the corresponding positions of the PVC cut-resistant rubber pad and the measuring substrate, respectively. The PCB board or heat sink should be aligned with the warp and weft lines on the measuring substrate. Next, the power and air supply are connected, the equipment is started, and the operator uses the industrial control computer to access the database, retrieving the model and batch of the PCB board or heat sink to which the thermal pads need to be applied, the location of the chip / protrusion to which the thermal pads need to be applied, the chip / protrusion size, and the thickness of the thermal pad to be applied to each chip / protrusion. After startup, the XYZ module drives the CCD camera to take pictures directly above the PCB board or heat sink on the measuring substrate, automatically identifying the size and location of the chip / protrusion to which the thermal pads need to be applied and automatically matching it with the data of the PCB board or heat sink of that model and batch. After successful matching, the XYZ module moves the CCD camera directly above the thermal pads, sequentially photographing the four thermal pads. It automatically identifies the size, shape, and position of each pad and plans the cutting path to minimize material waste (this identification is required upon initial use or after each pad replacement). The XYZ module then drives an ultrasonic cutter to cut the thermal pads to the corresponding size and thickness (a synchronous motor controls the ultrasonic cutter to rotate 360° via a synchronous pulley and belt, ensuring smooth and regular edges after cutting). Once a pad is cut, the solenoid valve and vacuum generator activate, controlling the guide rod cylinder and vacuum nozzle to pick up the cut pad. Driven by the XYZ module, the pad moves to directly above the corresponding chip / protrusion. The solenoid valve then shuts off the vacuum generator, and the guide rod cylinder retracts, automatically attaching the thermal pad. The equipment then automatically completes the cutting and attaching of the remaining thermal pads.

[0007] While this structure can achieve automated operation, the use of high-cost components such as CCD cameras and XYZ modules increases the cutting cost of PCB thermal conductive silicone pads, making it unsuitable for small-batch prototype production and assembly scenarios. Therefore, considering both manufacturing costs and cutting accuracy, we designed a PCB thermal conductive silicone pad contour cutting device that is more cost-effective while ensuring cutting accuracy. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a PCB thermal conductive silicone sticker contour cutting device that is low in cost and designed for small-batch prototype production assembly scenarios. It adopts a double-layer synchronous structure to achieve precise cutting while achieving zero contact with the PCB board.

[0009] To achieve the above objectives, the present invention employs a PCB thermal conductive silicone sticker contour cutting device, comprising a frame with a double-layer structure. The top layer of the frame is provided with a first plane for placing a PCB board and a positioning and contouring component that moves along the PCB board's positioning and contouring path. The bottom layer of the frame is provided with a second plane for placing PCB thermal conductive silicone stickers and a cutting component for cutting the PCB thermal conductive silicone stickers. The frame also provides a synchronization component along the moving path of the positioning and contouring component to drive the cutting component to move synchronously with the moving path of the positioning and contouring component.

[0010] The above structure is low-cost and is designed for small-batch prototype production assembly scenarios. It adopts a double-layer synchronous structure to achieve precise cutting while achieving zero contact with the PCB board.

[0011] As a further optimization of the above solution, the positioning and contouring component includes a contouring positioning head and a positioning laser pointer. The positioning laser pointer is arranged on the contouring positioning head to follow the movement of the contouring positioning head. The projection part of the positioning laser pointer travels along the edge of the heat dissipation part of the PCB board and defines the positioning and contouring path of the PCB board. The cutting component includes a moving seat, a cutting handle, and a cutting head arranged sequentially in the vertical direction. The moving seat and the horizontal axis lead screw are in a cooperating structure to move linearly along the horizontal axis lead screw. The above structure uses laser projection to define the edge of the heat dissipation part of the PCB board, ensuring that the thermal conductive silicone sticker is cut into a shape consistent with the heat dissipation area of ​​the PCB, and achieving precise cutting for the heat dissipation area.

[0012] As a further optimization of the above solution, the synchronization component includes a first moving part installed on the longitudinal moving path of the positioning and contouring component and a second moving part installed on the transverse moving path of the positioning and contouring component. The first moving part includes two pairs of longitudinal lead screw groups arranged opposite to each other on the frame. Each longitudinal lead screw group includes vertically aligned longitudinal lead screws. The two longitudinal lead screws on the same vertical plane are connected by a longitudinal synchronous belt. The second moving part is installed on the longitudinal lead screws and moves linearly along the longitudinal lead screws. The second moving part includes lead screw bearings of the same number and mating structure as the longitudinal lead screws. The horizontal axis lead screw is connected between two lead screw bearing seats on the same horizontal plane. The two horizontal axis lead screws on the same vertical plane are connected by a horizontal axis synchronous belt. The contour positioning head and the cutting assembly are respectively mounted on the upper and lower horizontal axis lead screws. The contour positioning head provides an operating component to move the contour positioning head along the contouring path. The synchronous assembly is driven by the lead screw, which has the advantages of high transmission efficiency, high transmission accuracy, smooth movement, no crawling phenomenon, and high axial transmission accuracy and axial stiffness, ensuring the stability and accuracy of the synchronous movement of the contour positioning assembly and the cutting assembly.

[0013] As a further optimization of the above solution, the operating component is a manual control component such as a handle, ensuring that the equipment is a purely manual mechanical structure without automatic control motors, circuits, etc., minimizing the assembly threshold for assembly workers, while ensuring structural stability and low failure rate, and minimizing the development cost of the engineering prototype.

[0014] As a further optimization of the above scheme, at least one guide shaft is arranged parallel to the side of the horizontal lead screw and passes through the contour positioning head or moving seat to ensure the stability of the contour positioning head or moving seat during the lateral movement process.

[0015] As a further optimization of the above solution, at least two PCB boards are arranged on the first surface, and the vertical projection of each PCB board is located within the PCB thermal conductive silicone pad. The shapes of two adjacent PCB boards partially overlap or completely overlap. The two completely overlapping PCB boards have heat dissipation areas that partially or completely overlap in position, so as to cut PCB thermal conductive silicone pads of different board types and heat dissipation shapes in one cutting action.

[0016] To ensure stable and accurate cutting of the cutting assembly, the cutting head includes a main connecting post connected to the cutter body and three auxiliary connecting parts distributed around the main connecting post. The auxiliary connecting parts include flanges and auxiliary connecting posts connecting the flanges to the cutting handle. Each of the three flanges is equipped with a damping pin and two positioning pins, and the damping pin contacts the end face of the auxiliary connecting post. In other words, the cutting head is improved into a three-auxiliary support structure, which makes the cutting more stable and realizes synchronous and stable cutting of the cutting assembly.

[0017] As a further optimization of the above solution, the cutting head is also provided with an angle adjustment structure. The angle adjustment structure includes a connecting plate mounted on the main connecting column of the cutting head and a first hinge lug fixed on the connecting plate with a horizontal axis. The first hinge lug and the lower part of the rear end face of the cutting head body form a hinge engagement. The angle adjustment structure also includes an adjusting screw and an adjusting block that engages with the adjusting screw. The adjusting screw is rotatably mounted on the connecting plate and is driven to rotate by a rotating component keyed to the adjusting screw. A second hinge lug extends from the upper part of the cutting head body, and the adjusting block and the second hinge lug form a horizontal hinge engagement.

[0018] As a further optimization of the above solution, the cutter head body is in the shape of a triangular prism. One of the edges of the cutter head body is taken as the reference edge. The length of the reference edge is greater than the length of the other two edges, and the included angle between two adjacent edges is 120°. By changing the cutter head to a triangular prism structure, the cutting stability is further improved.

[0019] The PCB thermal conductive silicone sticker contour cutting device of the present invention has the following beneficial effects:

[0020] 1. The present invention has a simple and compact structure, precise cutting, and is suitable for small-batch prototype production and assembly scenarios. It uses a double-layer synchronous structure to achieve precise cutting of the heat dissipation area without contacting the PCB board, thus avoiding the process of opening a die during the prototype assembly stage.

[0021] 2. The PCB thermal conductive silicone sticker contour cutting device of the present invention, unlike the disadvantages of low precision of manual cutting and high cost and complicated steps of CCD camera shooting, takes a different approach by using laser projection to define the edge of the heat dissipation part of the PCB board, ensuring that the thermal conductive silicone sticker is cut into the same shape as the heat dissipation area of ​​the PCB, thus achieving precise cutting for the heat dissipation area.

[0022] 3. The PCB thermal conductive silicone sticker contour cutting device of the present invention has the advantages of high transmission efficiency, high transmission accuracy, smooth movement, no crawling phenomenon, high axial transmission accuracy and high axial stiffness, which ensures the stability and accuracy of the synchronous movement of the positioning contouring component and the cutting component.

[0023] 4. The PCB thermal conductive silicone sticker contour cutting device of the present invention designs the operating components as manual control components such as grip handles, ensuring that the device is a purely manual mechanical structure without automatic control motors, circuits, etc., thereby minimizing the assembly threshold for assembly workers, while ensuring structural stability and low failure rate, and minimizing the development cost of engineering prototypes.

[0024] 5. A PCB thermal conductive silicone sticker contour cutting device of the present invention arranges at least two PCB boards on a first surface, and the vertical projection of each PCB board is located within the aforementioned PCB thermal conductive silicone sticker. The shapes of two adjacent PCB boards partially overlap or completely overlap, and the two completely overlapping PCB boards have heat dissipation areas that partially or completely overlap in position, so as to cut PCB thermal conductive silicone stickers of different board types and different heat dissipation shapes in one cutting action.

[0025] 6. The PCB thermal conductive silicone sticker contour cutting device of the present invention can adopt various methods to achieve the separation and contact action between the cutting head and the PCB thermal conductive silicone sticker, such as using a conventional threaded structure. Considering that the shaping cutting requires the cutting head to perform complex path cutting, a simple threaded structure cannot ensure the stability of the cutting head during the cutting process over a long period of time. Therefore, a bottom triangular junction structure is preferred, and the power driving requirement is achieved through the threaded unit, thereby meeting the purpose of strong and stable cutting on complex paths.

[0026] 7. The PCB thermal conductive silicone sticker contour cutting device of the present invention improves the cutting head to a three-auxiliary support structure, making the cutting more stable and realizing synchronous and stable cutting of the cutting components. The cutting head is also changed to a triangular prism structure to further improve cutting stability.

[0027] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope as a result, and the embodiments of the present invention include many changes, modifications and equivalents. Attached Figure Description

[0028] Figure 1 A three-dimensional structural diagram of a PCB thermal conductive silicone sticker contour cutting device;

[0029] Figure 2 This is a schematic diagram of the main structure of a PCB thermal conductive silicone sticker contour cutting device.

[0030] Figure 3 This is a three-dimensional structural diagram of the horizontal axis synchronous belt in this invention;

[0031] Figure 4 A top view of a PCB thermal conductive silicone sticker contour cutting device for a single PCB board;

[0032] Figure 5 A top view of a PCB thermal conductive silicone adhesive conformal cutting device with two PCB boards placed underneath.

[0033] Figure 6 This is a top view of the cutting blade head in this invention.

[0034] Figure 7 This is a three-dimensional structural diagram of the cutter head body in this invention;

[0035] Figure 8 This is a schematic diagram of the front view of the angle adjustment structure in this invention.

[0036] Figure 9 This is a three-dimensional structural diagram of the second hinged lug in this invention.

[0037] In the diagram: 1. Frame; 11. First plane; 12. Second plane; 2. Positioning and contouring assembly; 21. Contouring positioning head; 22. Positioning laser pointer; 3. Cutting assembly; 31. Moving seat; 32. Cutting shear handle; 33. Cutting shear head; 331. Main connecting column of the cutter head; 332. Flange; 333. Auxiliary connecting column; 334. Shock absorber pin; 335. Positioning pin; 4. Synchronization assembly; 41. First moving part; 42. Second moving part; 411. Longitudinal axis lead screw; 412. Longitudinal axis synchronous belt; 421. Lead screw bearing seat; 422. Horizontal axis lead screw; 423. Horizontal axis synchronous belt; 5. Operating component; 6. Guide shaft; 7. Cutter head body; 8. Angle adjustment structure; 81. Connecting plate; 82. First hinge lug; 83. Adjusting screw; 84. Adjusting block; 85. Rotating component; 86. Second hinge lug. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0039] It should be noted that when an element is referred to as "set on" or "provided with" another element, it can be directly on the other element or there may be an intermediate element. When an element is referred to as "connected to" or "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. "Fixed connection" means fixed connection. There are many ways of fixed connection, which are not within the scope of protection of this document. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] A PCB thermal conductive silicone sticker contour cutting device according to the first embodiment of the present invention is arranged for supplying PCB thermal conductive silicone stickers in a small-batch prototype production group assembly scenario. Figure 1-5 As shown, it includes a frame 1 with a double-layer structure, with the upper and lower layers of the frame 1 being a positioning and shaping space and a cutting space, respectively.

[0042] The positioning and contouring space is configured by placing a first plane 11, which is used to place the PCB board, on the bottom surface of the positioning and contouring space. This first plane 11 is preferably roughly rectangular, but it can also be circular, polygonal, or other shapes. Figure 1 As shown, a PCB board fixing structure can be arranged on the first plane 11 for fixing the PCB board. Of course, the PCB board can also be laid flat on the first plane 11. The positioning and contouring component 2 is installed on the top of the first plane 11. The positioning and contouring component 2 adopts a laser positioning structure, specifically including a contouring positioning head 21 and a positioning laser pen 22. The positioning laser pen 22 is arranged on the contouring positioning head 21 to move with the contouring positioning head 21. The projection part of the positioning laser pen 22 travels along the edge of the heat dissipation part of the PCB board and defines the positioning and contouring path.

[0043] The cutting space is used to place the second plane 12, which is the bottom surface for placing the PCB thermal conductive silicone pad. The second plane 12 is preferably a roughly rectangular structure, and its size is slightly larger than that of the first plane 11, so that the vertical projection of the first plane 11 lies within the second plane 12. The shape of the second plane 12 is preferably the same as that of the first plane 11. For example, if the first plane 11 is a roughly rectangular structure, the second plane 12 is also a roughly rectangular structure. The PCB thermal conductive silicone pad is laid flat on the second plane 12, and the PCB thermal conductive silicone pad accommodates the projection of the PCB board to ensure P... The synchronous cutting of the CB thermal conductive silicone sticker involves a cutting assembly 3 mounted on the top of the second plane 12. The cutting assembly 3 includes a movable seat 31, a cutting handle 32, and a cutting head 33 arranged sequentially along the vertical direction. The cutting head 33 has a telescopic blade body 7, for example, a threaded sleeve with a threaded connection is fitted on the outside of the blade body 7, so that the position of the blade body 7 in the vertical direction can be changed by rotating the blade body 7. When the cutting action begins, the blade head contacts the PCB thermal conductive silicone sticker and performs a cutting action on the PCB thermal conductive silicone sticker.

[0044] Synchronization component 4, which is arranged on the frame 1 and drives the cutting component to move synchronously with the positioning and contouring component 2 along the moving path of the positioning and contouring component 2, includes a first moving part 41 installed on the longitudinal moving path of the positioning and contouring component 2 and a second moving part 42 installed on the transverse moving path of the positioning and contouring component 2. The first moving part 41 includes two pairs of longitudinal lead screws 411 arranged opposite to each other on the frame 1. The longitudinal lead screws 411 include vertically aligned longitudinal lead screws 411. The two longitudinal lead screws 411 on the same vertical plane are connected by a longitudinal axis synchronization belt 412. Lead screw 411; connection, second moving part 42 is installed on the longitudinal lead screw 411 and moves linearly along the longitudinal lead screw 411. The second moving part 42 includes lead screw bearing seats 421 of the same number as the longitudinal lead screw 411 and with a matching structure. The horizontal lead screw 422 is connected between two lead screw bearing seats on the same horizontal plane. The two horizontal lead screws 422 on the same vertical plane are connected by a horizontal synchronous belt 423. The contour positioning head 21 and the cutting assembly are respectively installed on the upper and lower horizontal lead screws 422. The contour positioning head 21 provides an operating component 5 to move the contour positioning head 21 along the positioning contouring path.

[0045] Of course, there are other synchronization component 4 structures for the above structure, such as replacing the lead screw with a slide rod, or replacing the timing belt with a chain.

[0046] As a further optimization of the above solution, at least one guide shaft 6 is arranged parallel to the side of the horizontal axis lead screw 422 and passes through the contour positioning head 21 or the moving seat 31 to ensure the stability of the contour positioning head 21 or the moving seat 31 during the lateral movement. Preferably, in this embodiment, there are two guide shafts 6 on the same horizontal plane, which are placed on both sides of the horizontal axis lead screw 422.

[0047] This embodiment provides a PCB thermal conductive silicone sticker contour cutting device, the working process of which is as follows:

[0048] The staff manually moves the contour positioning head 21 so that the laser pointer spot circles the heat dissipation area of ​​the PCB board. During the movement, the contour positioning head 21 drives the horizontal axis lead screw and the vertical axis lead screw to rotate, which in turn drives the lower layer cutting head 33 to follow the same path. In this way, the lower layer thermal conductive silicone pad can be cut into a shape that matches the heat dissipation area of ​​the PCB.

[0049] The detailed structure of a PCB thermal conductive silicone sticker contour cutting device according to a second embodiment of the present invention is shown below:

[0050] The frame 1 includes a double-layer structure. The top layer of the frame 1 is provided with a first plane 11 for placing a PCB board and a positioning and contouring component 2 that moves along the positioning and contouring path of the PCB board. The bottom layer of the frame 1 is provided with a second plane 12 for placing a PCB thermal conductive silicone sticker and a cutting component 3 for cutting the PCB thermal conductive silicone sticker. The frame 1 also provides a synchronization component 4 that drives the cutting component to move synchronously along the moving path of the positioning and contouring component 2.

[0051] The aforementioned synchronization component 4 includes a first moving part 41 installed on the longitudinal moving path of the positioning and contouring component 2 and a second moving part 42 installed on the transverse moving path of the positioning and contouring component 2. The first moving part 41 includes two pairs of longitudinal lead screws 411 arranged opposite to each other on the frame 1. Each pair of longitudinal lead screws 411 includes vertically aligned longitudinal lead screws 411. The two longitudinal lead screws 411 on the same vertical plane are connected by a longitudinal synchronous belt 412. The second moving part 42 is installed on the longitudinal lead screws 411 and moves linearly along the longitudinal lead screws 411. The second moving part 42 includes the same number of longitudinal lead screws 411 and has a mating structure. The lead screw bearing housing 421 and the horizontal lead screw 422 are connected between two lead screw bearing housings on the same horizontal plane. The two horizontal lead screws 422 on the same vertical plane are connected by a horizontal synchronous belt 423. The contour positioning head 21 and the cutting assembly are respectively installed on the upper and lower horizontal lead screws 422. The contour positioning head 21 provides an operating component 5 to move the contour positioning head 21 along the contouring path. The synchronous assembly 4 is driven by the lead screw and has the advantages of high transmission efficiency, high transmission accuracy, smooth movement, no crawling phenomenon, high axial transmission accuracy and high axial stiffness, ensuring the stability and accuracy of the synchronous movement of the contour positioning assembly 2 and the cutting assembly 3.

[0052] The operating component 5 is a manual control component such as a handle, ensuring that the equipment is a purely manual mechanical structure without automatic control motors, circuits, etc., minimizing the assembly threshold for assembly workers, while ensuring structural stability and low failure rate, thus minimizing the development cost of the engineering prototype.

[0053] Regarding the grip of the handle, such as Figure 5 As shown, in this embodiment, a roughly rectangular structure is selected, and the edges are treated with anti-slip texture to improve the friction of the edge parts.

[0054] The detailed structure of a PCB thermal conductive silicone sticker contour cutting device according to a third embodiment of the present invention is shown below:

[0055] The frame includes a double-layer structure 1. The top layer of the frame 1 is provided with a first plane 11 for placing a PCB board and a positioning and contouring component 2 that moves along the positioning and contouring path of the PCB board. The bottom layer of the frame 1 is provided with a second plane 12 for placing a PCB thermal conductive silicone sticker and a cutting component 3 for cutting the PCB thermal conductive silicone sticker. The frame 1 also provides a synchronization component 4 that drives the cutting component to move synchronously along the moving path of the positioning and contouring component 2.

[0056] At least two PCBs are arranged on the first surface, and the vertical projection of each PCB is located within the PCB thermal conductive silicone pad. The shapes of two adjacent PCBs partially overlap or completely overlap, and the two completely overlapping PCBs have heat dissipation areas that partially or completely overlap in position.

[0057] Detailed, such as Figure 4 as well as Figure 5 As shown, during the engineering prototype assembly stage of electronic devices, the PCB boards have not yet been mass-produced, and there is a possibility of modification to the structure and PCB. In this embodiment, at least two PCB boards of different shapes can be placed on the first plane 11, and the two PCB boards have two different shapes of heat dissipation areas. Therefore, in this embodiment, PCB thermal conductive silicone pads of different board types and heat dissipation shapes can be cut in one cutting action.

[0058] This embodiment provides a PCB thermal conductive silicone sticker contour cutting device, the working process of which is as follows:

[0059] The staff manually moves the contour positioning head 21 so that the laser pointer spot circles the heat dissipation area of ​​each PCB board. During the movement, the contour positioning head 21 drives the horizontal axis lead screw and the vertical axis lead screw to rotate, which in turn drives the lower layer cutting head 33 to follow the same path. In this way, the lower layer thermal conductive silicone sticker can be cut into the same shape as the heat dissipation area of ​​the two PCB boards.

[0060] The detailed structure of a PCB thermal conductive silicone sticker contour cutting device according to the fourth embodiment of the present invention is shown below:

[0061] The frame includes a double-layer structure 1. The top layer of the frame 1 is provided with a first plane 11 for placing a PCB board and a positioning and contouring component 2 that moves along the positioning and contouring path of the PCB board. The bottom layer of the frame 1 is provided with a second plane 12 for placing a PCB thermal conductive silicone sticker and a cutting component 3 for cutting the PCB thermal conductive silicone sticker. The frame 1 also provides a synchronization component 4 that drives the cutting component to move synchronously along the moving path of the positioning and contouring component 2.

[0062] The aforementioned synchronization component 4 includes a first moving part 41 installed on the longitudinal moving path of the positioning and contouring component 2 and a second moving part 42 installed on the transverse moving path of the positioning and contouring component 2. The first moving part 41 includes two pairs of longitudinal lead screws 411 arranged opposite to each other on the frame 1. Each pair of longitudinal lead screws 411 includes vertically aligned longitudinal lead screws 411. The two longitudinal lead screws 411 on the same vertical plane are connected by a longitudinal timing belt 412. The second moving part 42 is installed on the longitudinal lead screws 411. The second moving part 42 includes a screw bearing seat 421 with the same number of screws as the longitudinal screws 411 and a matching structure. The horizontal screw 422 is connected between two screw bearing seats on the same horizontal plane. The two horizontal screws 422 on the same vertical plane are connected by a horizontal synchronous belt 423. The contour positioning head 21 and the cutting assembly are respectively installed on the upper and lower horizontal screws 422. The contour positioning head 21 provides an operating component 5 to move the contour positioning head 21 along the positioning contouring path.

[0063] The cutting assembly 3 includes a movable seat 31, a cutting handle 32, and a cutting head 33 arranged sequentially along the vertical direction. The movable seat 31 is in a cooperating structure with the horizontal axis lead screw 422 to move linearly along the horizontal axis lead screw 422.

[0064] like Figure 6 As shown, to ensure the smooth and accurate cutting of the cutting assembly 3, the cutting head 33 includes a main connecting post 331 connected to the head body 7 and three auxiliary connecting parts distributed around the main connecting post 331. The auxiliary connecting parts include flanges 332 and auxiliary connecting posts 333 connecting the flanges 332 and the cutting handle 32. Each of the three flanges 332 is equipped with a damping pin 334 and two positioning pins 335, and the damping pins 334 contact the end face of the auxiliary connecting posts 333. That is, the cutting head 33 is improved into a three-auxiliary support structure to achieve three-point positioning support, prevent the vibration caused by moving cutting, enhance the rigidity and service life of the cutting head 33, make cutting more stable, and realize synchronous and stable cutting of the cutting assembly 3.

[0065] The detailed structure of a PCB thermal conductive silicone sticker contour cutting device according to the fourth embodiment of the present invention is shown below:

[0066] The frame includes a double-layer structure 1. The top layer of the frame 1 is provided with a first plane 11 for placing a PCB board and a positioning and contouring component 2 that moves along the positioning and contouring path of the PCB board. The bottom layer of the frame 1 is provided with a second plane 12 for placing a PCB thermal conductive silicone sticker and a cutting component 3 for cutting the PCB thermal conductive silicone sticker. The frame 1 also provides a synchronization component 4 that drives the cutting component to move synchronously along the moving path of the positioning and contouring component 2.

[0067] The aforementioned synchronization component 4 includes a first moving part 41 installed on the longitudinal moving path of the positioning and contouring component 2 and a second moving part 42 installed on the transverse moving path of the positioning and contouring component 2. The first moving part 41 includes two pairs of longitudinal lead screws 411 arranged opposite to each other on the frame 1. Each pair of longitudinal lead screws 411 includes vertically aligned longitudinal lead screws 411. The two longitudinal lead screws 411 on the same vertical plane are connected by a longitudinal timing belt 412. The second moving part 42 is installed on the longitudinal lead screws 411. The second moving part 42 includes a screw bearing seat 421 with the same number of screws as the longitudinal screws 411 and a matching structure. The horizontal screw 422 is connected between two screw bearing seats on the same horizontal plane. The two horizontal screws 422 on the same vertical plane are connected by a horizontal synchronous belt 423. The contour positioning head 21 and the cutting assembly are respectively installed on the upper and lower horizontal screws 422. The contour positioning head 21 provides an operating component 5 to move the contour positioning head 21 along the positioning contouring path.

[0068] The cutting assembly 3 includes a movable seat 31, a cutting handle 32, and a cutting head 33 arranged sequentially along the vertical direction. The movable seat 31 is in a cooperating structure with the horizontal axis lead screw 422 to move linearly along the horizontal axis lead screw 422.

[0069] like Figure 7 As shown, the cutter head body 7 is designed as a triangular prism shape. Of course, it can also be designed as a quadrangular prism or other polyprismatic shape. One edge of the cutter head body 7 is taken as the reference edge. The length of the reference edge is greater than the length of the other two edges. By changing the cutter head to a triangular prism structure, the rake angle of the cutter is kept at a small angle, which improves the strength of the cutter head body 7 and the cutting head 33. The heat conduction area and heat capacity of the cutter head are kept stable, and bending stress is less likely to occur at the cutter head body 7, reducing the possibility of chipping and further improving cutting stability.

[0070] The detailed structure of a PCB thermal conductive silicone sticker contour cutting device according to the fifth embodiment of the present invention is shown below:

[0071] The frame includes a double-layer structure 1. The top layer of the frame 1 is provided with a first plane 11 for placing a PCB board and a positioning and contouring component 2 that moves along the positioning and contouring path of the PCB board. The bottom layer of the frame 1 is provided with a second plane 12 for placing a PCB thermal conductive silicone sticker and a cutting component 3 for cutting the PCB thermal conductive silicone sticker. The frame 1 also provides a synchronization component 4 that drives the cutting component to move synchronously along the moving path of the positioning and contouring component 2.

[0072] The aforementioned synchronization component 4 includes a first moving part 41 installed on the longitudinal moving path of the positioning and contouring component 2 and a second moving part 42 installed on the transverse moving path of the positioning and contouring component 2. The first moving part 41 includes two pairs of longitudinal lead screws 411 arranged opposite to each other on the frame 1. Each pair of longitudinal lead screws 411 includes vertically aligned longitudinal lead screws 411. The two longitudinal lead screws 411 on the same vertical plane are connected by a longitudinal timing belt 412. The second moving part 42 is installed on the longitudinal lead screws 411. The second moving part 42 includes a screw bearing seat 421 with the same number of screws as the longitudinal screws 411 and a matching structure. The horizontal screw 422 is connected between two screw bearing seats on the same horizontal plane. The two horizontal screws 422 on the same vertical plane are connected by a horizontal synchronous belt 423. The contour positioning head 21 and the cutting assembly are respectively installed on the upper and lower horizontal screws 422. The contour positioning head 21 provides an operating component 5 to move the contour positioning head 21 along the positioning contouring path.

[0073] The cutting assembly 3 includes a movable seat 31, a cutting handle 32, and a cutting head 33 arranged sequentially along the vertical direction. The movable seat 31 is in a cooperating structure with the horizontal axis lead screw 422 to move linearly along the horizontal axis lead screw 422.

[0074] like Figure 6 As shown, to ensure the smooth and accurate cutting of the cutting assembly 3, the cutting head 33 includes a main connecting post 331 connected to the head body 7 and three auxiliary connecting parts distributed around the main connecting post 331. The auxiliary connecting parts include flanges 332 and auxiliary connecting posts 333 connecting the flanges 332 and the cutting handle 32. Each of the three flanges 332 is equipped with a damping pin 334 and two positioning pins 335, and the damping pins 334 contact the end face of the auxiliary connecting posts 333. That is, the cutting head 33 is improved into a three-auxiliary support structure to achieve three-point positioning support, prevent the vibration caused by moving cutting, enhance the rigidity and service life of the cutting head 33, make cutting more stable, and realize synchronous and stable cutting of the cutting assembly 3.

[0075] like Figure 8 as well as Figure 9As shown, the cutting head 33 is also provided with an angle adjustment structure 8. The angle adjustment structure 8 includes a connecting plate 81 mounted on the main connecting post 331 of the cutting head and a first hinge ear 82 fixed on the connecting plate 81 and with its axis horizontal. The first hinge ear 82 and the lower part of the rear end face of the cutting head body 7 form a hinged engagement. The angle adjustment structure 8 also includes an adjusting screw 83 and an adjusting block 84 that is engaged with the adjusting screw 83. The adjusting screw 83 is rotatably mounted on the connecting plate 81 and is driven to rotate by a rotating part 85 that is keyed to the adjusting screw 83. The upper part of the cutting head body 7 extends to provide a second hinge ear 86. The adjusting block 84 and the second hinge ear 86 form a horizontal hinged engagement.

[0076] In practical operation, when it is necessary to adjust the angle between the cutter head body 7 and the PCB thermal conductive silicone pad, the angle adjustment structure 8 can be activated to rotate the adjustment screw 83, thereby causing the adjustment block 84 to reciprocate linearly. This, in turn, drives the second hinge lug 86, along with the entire cutter head body 7, to swing relative to the first hinge lug 82. Because the hinge axis of the angle adjustment structure 8 is horizontally arranged and perpendicular to the length direction of the PCB thermal conductive silicone pad, the parallel posture of the rotating part 85 relative to the angle steel can always be maintained, ensuring adjustment stability.

[0077] like Figure 7 As shown, the cutter head body 7 is designed as a triangular prism shape. Of course, it can also be designed as a quadrangular prism or other polyprismatic shapes. Taking one edge of the cutter head body 7 as the reference edge, the length of the reference edge is greater than the length of the other two edges. By changing the cutter head to a triangular prism structure, the rake angle of the cutter is kept at a small angle, which improves the strength of the cutter head body 7 and the cutting head 33. The heat conduction area and heat capacity of the cutter head are kept stable, and bending stress is less likely to occur at the cutter head body 7, reducing the possibility of chipping. It is also more suitable for the angle adjustment structure 8, further improving the cutting stability.

[0078] In summary, the present invention has a simple and compact structure, precise cutting, and is suitable for small-batch prototype production and assembly scenarios. It uses a double-layer synchronous structure to achieve precise cutting of the heat dissipation area without contacting the PCB board, thus avoiding the process of opening a die during the prototype assembly stage.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A PCB thermal conductive silicone adhesive tape contour cutting device, characterized in that, The frame (1) has a double-layer structure. The top layer of the frame (1) is provided with a first plane (11) for placing the PCB board and a positioning and contouring component (2) that moves along the positioning and contouring path of the PCB board. The bottom layer of the frame (1) is provided with a second plane (12) for placing the PCB thermal conductive silicone sticker and a cutting component (3) for cutting the PCB thermal conductive silicone sticker. The frame (1) is also provided with a synchronization component (4) that drives the cutting component to move synchronously with the positioning and contouring component (2) along the moving path of the positioning and contouring component (2). The above-mentioned positioning and contouring component (2) includes a contouring positioning head (21) and a positioning laser pointer (22). The positioning laser pointer (22) is arranged on the contouring positioning head (21) to follow the contouring positioning head (21) as it moves. The projection part of the positioning laser pointer (22) travels along the edge of the heat dissipation part of the PCB board and defines the PCB board positioning and contouring path. The aforementioned synchronization component (4) includes a first moving part (41) installed on the longitudinal moving path of the positioning and contouring component (2) and a second moving part (42) installed on the lateral moving path of the positioning and contouring component (2). The first moving part (41) includes two pairs of longitudinal lead screws (411) arranged opposite to each other on the frame (1). Each pair of longitudinal lead screws (411) includes vertically aligned longitudinal lead screws (411). The two longitudinal lead screws (411) on the same vertical plane are connected by a longitudinal timing belt (412). The second moving part (42) is mounted on the longitudinal lead screws (411) and moves linearly along the longitudinal lead screws (411). The second moving part (42) includes components that are connected to the longitudinal lead screws. (411) There are two screw bearing seats (421) with the same number and a matching structure. The horizontal screw (422) is connected between two screw bearing seats on the same horizontal plane. The two horizontal screws (422) on the same vertical plane are connected by a horizontal synchronous belt (423). The contour positioning head (21) and the cutting assembly are respectively installed on the upper and lower horizontal screws (422). The contour positioning head (21) provides an operating component (5) to move the contour positioning head (21) along the contouring path.

2. The PCB thermal conductive silicone sticker contour cutting device according to claim 1, characterized in that: The operating component (5) is a grip handle.

3. The PCB thermal conductive silicone sticker contour cutting device according to claim 2, characterized in that: The cutting assembly (3) includes a movable seat (31), a cutting handle (32) and a cutting head (33) arranged sequentially along the vertical direction. The movable seat (31) is in a cooperating structure with the horizontal axis lead screw (422) to move linearly along the horizontal axis lead screw (422).

4. A PCB thermal conductive silicone sticker contour cutting device according to any one of claims 1-3, characterized in that: At least two PCBs are arranged on the first plane (11) mentioned above, and the vertical projection of each PCB is located within the PCB thermal conductive silicone pad.

5. The PCB thermal conductive silicone sticker contour cutting device according to claim 3, characterized in that: The aforementioned cutting head (33) includes a main connecting post (331) connected to the head body (7) and three auxiliary connecting parts distributed around the main connecting post (331). The auxiliary connecting parts include a flange (332) and an auxiliary connecting post (333) connecting the flange (332) and the cutting head handle (32). A damping pin (334) and two positioning pins (335) are respectively installed on the three flanges (332), and the damping pin (334) contacts the end face of the auxiliary connecting post (333).

6. The PCB thermal conductive silicone sticker contour cutting device according to claim 5, characterized in that: The cutting head (33) is also provided with an angle adjustment structure (8). The angle adjustment structure (8) includes a connecting plate (81) mounted on the main connecting column (331) of the cutting head and a first hinge ear (82) fixed on the connecting plate (81) and with its axis horizontal. The first hinge ear (82) and the lower part of the rear end face of the cutting head body (7) form a hinge fit. The angle adjustment structure (8) also includes an adjusting screw (83) and an adjusting block (84) that fits with the adjusting screw (83). The adjusting screw (83) is rotatably mounted on the connecting plate (81) and is driven to rotate by a rotating part (85) that is keyed to the adjusting screw (83). The upper part of the cutting head body (7) is provided with a second hinge ear (86). The adjusting block (84) and the second hinge ear (86) form a horizontal hinge fit.

7. A PCB thermal conductive silicone adhesive tape contour cutting device according to claim 5 or claim 6, characterized in that: The cutter head body (7) is in the shape of a triangular prism. One of the edges of the cutter head body (7) is taken as the reference edge, and the length of the reference edge is greater than the length of the other two edges.

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