Thermally conductive pad laminating machine and laminating method

Abstract

The present invention relates to a thermal pad laminating machine and a laminating method, wherein a thermal pad laminating machine includes a frame, and a feeding station, a grabbing station and a winding station arranged on the frame, the feeding station is provided with a feeding device and a power mechanism for driving the feeding device to move close to the grabbing station, the feeding device includes a support frame connected to the power mechanism, and a pressing device arranged on the support frame; the grabbing station is provided with a grabbing manipulator for moving the thermal pad from the feeding device to the winding station, and the grabbing end of the grabbing manipulator is provided with a suction cup; the winding station is provided with a bottom film unwinding mechanism, a face film unwinding mechanism and a winding mechanism, the bottom film and the face film are wound around the winding mechanism after unwinding, and a grabbing manipulator channel is provided between the bottom film unwinding mechanism and the face film unwinding mechanism. The present invention realizes the separation of the thermal pad from the original film body, the movement of the thermal pad from the feeding station to the winding station, and the laying of the bottom film and the face film, greatly improving the production and product quality.

Description

Technical Field

[0001] The invention relates to the technical field of thermally conductive pad packaging, and in particular to a thermally conductive pad laminating machine and a laminating method. Background Art

[0002] Thermally conductive gaskets are a commonly used part in electronic devices, mainly used for heat dissipation of electronic devices. During the production of thermally conductive gaskets, in order to improve production efficiency, a large gasket is usually glued to the film body, and then the large gasket is cut into multiple small cubes. The small square-shaped thermally conductive gaskets are not separated from the film body to prevent them from scattering. In order to ensure that the thermally conductive gasket is not contaminated during transportation, it is necessary to remove it from the film body and coat both sides with a film. At present, there is no equipment for coating thermally conductive gaskets. Usually, the thermally conductive gasket is removed from the film body manually, and then the thermally conductive gasket is protected by a bottom film and a mask. The coating efficiency is low, and fingerprints will inevitably be left on the surface of the gasket, thereby contaminating the thermally conductive gasket and adversely affecting the product quality. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a thermally conductive gasket laminating machine and a laminating method, which are specifically used to separate the thermally conductive gasket from the original film body and to laminat e both sides of the thermally conductive gasket, thereby avoiding contamination of the gasket surface caused by manual operation and greatly improving the laminating efficiency.

[0004] The present invention is realized by the following technical scheme, which provides a thermal pad laminating machine, including a frame, and a loading station, a material grabbing station and a winding station arranged on the frame, wherein the loading station is provided with a loading device and a power mechanism for driving the loading device to move close to the material grabbing station, and the loading device includes a support frame connected to the power mechanism, and a material pressing device arranged on the support frame;

[0005] The material grabbing station is provided with a material grabbing manipulator for moving the thermally conductive pad from the loading device to the winding station, and the material grabbing end of the material grabbing manipulator is provided with a suction cup adapted to the thermally conductive pad;

[0006] The winding station is provided with a base film unwinding mechanism, a face mask unwinding mechanism and a winding mechanism. The base film and the face mask are wound around the winding mechanism after unwinding. A channel is provided between the base film unwinding mechanism and the face mask unwinding mechanism for a material grabbing robot to place the thermal conductive pad on the base film.

[0007] This solution uses a pressing device to fix the film body with the thermally conductive gasket adhered to it, and uses a power mechanism to move the loading device forward as a whole, so that the thermally conductive gasket is in a position to be grasped; the thermally conductive gasket is sucked by the suction cup of the grasping robot to avoid contamination of the surface of the thermally conductive gasket, and the thermally conductive gasket is moved to the base film by the grasping robot, so that the base film forms a protection for the lower surface of the thermally conductive gasket; the upper surface of the thermally conductive gasket is protected by covering the face mask on the thermally conductive gasket, and the three-layer structure product formed by the face mask, thermally conductive gasket and base film is rolled up by the rolling mechanism to complete the packaging of the thermally conductive gasket product.

[0008] As an optimization, a CCD camera facing downward is also installed on the material grabbing manipulator. This optimization solution improves the accuracy of grabbing by setting a CCD camera to perform secondary positioning when grabbing the thermal pad. After the thermal pad is placed on the base film, the CCD camera is used to measure the product size to ensure product quality.

[0009] As an optimization, there are two loading stations, located on the left and right sides of the gripping manipulator. This optimization scheme realizes the alternating feeding of the two loading devices by setting up two loading stations, avoiding the interruption of the laminating operation due to the placement of new products to be laminated, ensuring the continuity of the laminating operation and further improving the laminating efficiency.

[0010] As an optimization, the mask unwinding mechanism is located between the base film unwinding mechanism and the rewinding mechanism, and a pressure roller is arranged between the mask unwinding mechanism and the rewinding mechanism. The base film and the mask extend upward to the rewinding mechanism after passing through the bottom of the pressure roller. The setting of this optimization scheme allows the three-layer structure product formed by the mask, the thermal pad and the base film to be rewound after passing through the pressure roller, and the pressure roller is used to make the mask, the thermal pad and the base film more firmly bonded.

[0011] As an optimization, the pressing device includes a work table fixedly connected to the support frame, and a rear film pressing mechanism slidably connected to the work table along the front and rear directions. A redirecting roller is rotatably arranged at the front end of the work table. The redirecting roller supports the lower surface of the film body where the thermal conductive gasket is located, and a front film pressing mechanism is arranged on the front side of the redirecting roller. The pressing device also includes a driving mechanism for driving the front film pressing mechanism to move toward the bottom of the work table.

[0012] The pressing device of this optimized solution presses the rear end of the film body with the thermal conductive gasket adhered thereto through the rear film pressing mechanism, and presses the front end of the film body through the front film pressing mechanism. When feeding, the driving mechanism drives the front film pressing mechanism to move toward the bottom of the worktable. After the film body passes by the redirecting roller, it moves toward the bottom of the worktable with the front film pressing mechanism. Every time the film body moves, the thermal conductive gasket on the film body moves forward a certain distance for the robot to pick up.

[0013] As an optimization, the front film pressing mechanism includes an upper pressing plate, a lower pressing plate and a film pressing cylinder, the cylinder body of the film pressing cylinder is fixedly connected to the lower pressing plate, the piston rod of the film pressing cylinder passes through the lower pressing plate upward, and the upper end of the piston rod of the film pressing cylinder is connected to the upper pressing plate. The front film pressing mechanism of this optimization scheme drives the upper pressing plate to move toward or away from the lower pressing plate through the film pressing cylinder to achieve clamping and loosening of the film body, has a simple structure, fast action, and is conducive to improving work efficiency.

[0014] As an optimization, the bottom surface of the upper pressing plate and the top surface of the lower pressing plate are respectively provided with anti-skid grooves. This optimization scheme improves the reliability of the upper pressing plate and the lower pressing plate clamping the film body by providing the anti-skid grooves, and prevents the film body from slipping out from between the upper pressing plate and the lower pressing plate.

[0015] As an optimization, the driving mechanism includes an annular belt rotatably arranged on a support frame and a motor driving the annular belt to rotate, and the front film pressing mechanism and the rear film pressing mechanism are both fixedly connected to the annular belt. The driving mechanism of this optimization scheme has a simple structure, and the annular belt is driven by a motor to rotate, thereby realizing the synchronous movement of the front film pressing mechanism and the rear film pressing mechanism, and realizing feeding.

[0016] As an optimization, the rear film pressing mechanism includes a lower pressing block slidably connected to the workbench, and an upper pressing block fixedly connected to the lower pressing block by bolts. The workbench is fixedly provided with a guide rail adapted to the lower pressing block. The rear film pressing mechanism of this optimization scheme has a simple structure. The upper and lower pressing blocks are fixedly connected by bolts, which is convenient for disassembly to facilitate the removal of the film body. The guide rail is provided to provide guidance for the lower pressing block while preventing the lower pressing block from shaking.

[0017] The present invention also provides a laminating method using the above-mentioned thermal conductive pad laminating machine, comprising the following steps:

[0018] 1. Fix the film body with the thermal pads by the pressing device, and drive the feeding device forward by the power mechanism, so that the front row of thermal pads are in the position to be grasped;

[0019] 2. The material grabbing robot moves to suck the thermal pad at the position to be grabbed through the suction cup, and moves the thermal pad to the bottom film between the bottom film unwinding mechanism and the mask unwinding mechanism;

[0020] 3. The mask unwinding mechanism and the bottom film unwinding mechanism unwind synchronously, and the mask, thermal pad and bottom film form a three-layer structure product, and the three-layer structure product is rewound by the rewinding mechanism;

[0021] 4. After all the thermally conductive pads in the front row are moved to the bottom film, the driving mechanism of the pressing device drives the film body with the thermally conductive pads to move forward as a whole, so that the next row of thermally conductive pads moves to the position to be grasped.

[0022] The beneficial effects of the present invention are as follows: through the setting of the loading station, the grabbing station and the winding station, the separation of the thermally conductive gasket from the original film body, the movement of the thermally conductive gasket from the loading station to the winding station, and the laying of the base film and the surface film are realized, which greatly improves the production efficiency, avoids the contamination of the surface of the thermally conductive gasket due to manual operation, and improves the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the laminating machine of the present invention;

[0024] Figure 2 A top view of the laminating machine of the present invention;

[0025] Figure 3 It is a schematic structural diagram of the feeding device of the present invention;

[0026] Figure 4 It is a schematic structural diagram of the material pressing device of the present invention;

[0027] Figure 5 It is a side view of the material pressing device of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the material grabbing manipulator of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the winding mechanism of the present invention;

[0030] Figure 8 It is a side view of the winding mechanism of the present invention;

[0031] As shown in the figure:

[0032] 1. Frame, 2. Feeding device, 3. Grabbing manipulator, 4. Winding station, 5. Power mechanism, 6. Pressing device, 7. CCD camera, 8. Suction cup, 9. Bottom film unwinding mechanism, 10. Face mask unwinding mechanism, 11. Winding mechanism, 12. Bottom film, 13. Second rotating roller, 14. Thermal pad, 15. Pressing roller, 16. First rotating roller, 101. Lower pressing plate, 102. Upper pressing plate, 103. Proximity switch, 104. Film body, 105. Work table, 106. Rear film pressing mechanism, 107. Annular belt, 108. Slide rail, 109. Support frame, 110. Motor, 111. Film pressing cylinder. DETAILED DESCRIPTION

[0033] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0034] like Figure 1 and 2A thermal pad laminating machine shown in the figure comprises a frame 1, and a loading station, a gripping station and a winding station arranged on the frame, wherein the loading station is located behind the gripping station, and the winding station is located in front of the gripping station. There are two loading stations, which are respectively located on the left and right sides of the gripping manipulator. In order to make the structural arrangement more compact and reasonable, the cross section of the frame is square, the two loading stations and the winding station are respectively located on the opposite sides of the square, and the gripping station is located at the center of the square.

[0035] The material grabbing station is provided with a material grabbing manipulator 3 for moving the thermal pad 14 from the loading device to the winding station. The material grabbing end of the material grabbing manipulator is provided with a suction cup 8 adapted to the thermal pad. The suction cup adopts the vacuum suction cup structure in the prior art, and the material grabbing manipulator also adopts the prior art. A CCD camera 7 facing downward is also installed on the material grabbing manipulator, which performs secondary precise positioning of the product grabbing and measures the size of the product placed on the winding base film.

[0036] The loading station is provided with a loading device 2 and a power mechanism 5 for driving the loading device to move close to the material grabbing station. The power mechanism adopts a stepper motor, which drives the loading device to move through the transmission of a synchronous belt. A track is fixed on the frame to provide guidance for the movement of the loading device. The loading device includes a support frame 109 connected to the synchronous belt of the power mechanism, and a pressing device 6 arranged on the support frame 109. Specifically, the pressing device 6 includes a workbench 105 fixedly connected to the support frame 109, and a rear film pressing mechanism 106 slidably connected to the workbench along the front and rear directions. A redirecting roller is rotatably arranged at the front end of the workbench, and the redirecting roller supports the lower surface of the film body 104 where the thermal pad is located. A front film pressing mechanism is arranged on the front side of the redirecting roller.

[0037] The front film pressing mechanism includes an upper pressing plate 102, a lower pressing plate 101 and a film pressing cylinder 111. The upper pressing plate 102 is located directly above the lower pressing plate 101. The bottom surface of the upper pressing plate and the top surface of the lower pressing plate are respectively provided with anti-slip grooves. The cylinder body of the film pressing cylinder is fixedly connected to the lower pressing plate. The piston rod of the film pressing cylinder passes through the lower pressing plate upward, and the upper end of the piston rod of the film pressing cylinder is connected to the upper pressing plate. The piston rod of the film pressing cylinder drives the upper pressing plate to move up and down, thereby realizing the compression and loosening of the front end of the film body.

[0038] The rear film pressing mechanism includes a lower pressing block slidably connected to the work table, and an upper pressing block fixedly connected to the lower pressing block by bolts. The upper pressing block is located above the lower pressing block, and the rear end of the film body is clamped between the upper pressing block and the lower pressing block. A guide rail adapted to the lower pressing block is fixed on the work table. The guide rail is horizontally arranged along the front-to-back direction to provide guidance for the movement of the lower pressing block.

[0039] The material pressing device of this embodiment also includes a driving mechanism for driving the front film pressing mechanism to move toward the bottom of the worktable. The driving mechanism includes an annular belt 107 rotatably arranged on a support frame and a motor 110 for driving the annular belt to rotate. A roller for the annular belt to pass around is rotatably arranged on the support frame. The annular belt is triangular in shape. The front film pressing mechanism and the rear film pressing mechanism are both fixedly connected to the annular belt. For this embodiment, the lower pressing block and the lower pressing plate are both fixedly connected to the annular belt. When the annular belt rotates under the drive of the motor, the lower pressing block and the lower pressing plate are driven to move to achieve feeding. A slide rail 108 adapted to the lower pressing plate is fixedly arranged on the support frame. The slide rail is tilted, and the front end of the slide rail is higher than the rear end of the slide rail. The slide rail is used to provide guidance for the movement of the lower pressing plate.

[0040] A proximity switch 103 corresponding to the upper limit position of the lower pressure plate is installed at the front end of the workbench. The proximity switch is electrically connected to the motor of the drive mechanism. When the proximity switch detects the lower pressure plate, the motor stops rotating. The motor in this embodiment is a stepper motor, which is convenient for controlling the feeding distance of the film body.

[0041] The winding station 4 is provided with a bottom film unwinding mechanism 9, a face mask unwinding mechanism 10 and a winding mechanism 11 arranged from right to left. The bottom film 12 and the face mask are wound around the winding mechanism after unwinding, and the bottom film after unwinding is located below the face mask. A channel is provided between the bottom film unwinding mechanism and the face mask unwinding mechanism for the gripping manipulator to place the thermal pad on the bottom film. The manipulator places the grabbed products on the bottom film at a certain spacing, and the bottom film unwinding mechanism unwinds at a fixed length and is controlled by a stepping motor to achieve accurate measurement of the bottom film length and ensure that the spacing of the thermal pads placed on the bottom film is consistent.

[0042] The mask unwinding mechanism 10 is located between the bottom film unwinding mechanism 9 and the winding mechanism 11. A pressure roller 15 is rotatably arranged between the mask unwinding mechanism and the winding mechanism. The bottom film and the mask extend upward to the winding mechanism after passing through the bottom of the pressure roller. A first rotating roller 16 and a second rotating roller 13 are arranged below the mask unwinding mechanism and the bottom film unwinding mechanism. The first rotating roller 16 is located between the mask unwinding mechanism and the second rotating roller 13. The unwound mask is in a horizontal state after passing around the first rotating roller 16, and the unwound bottom film is in a horizontal state after passing around the second rotating roller 13.

[0043] A laminating method using the thermal pad laminating machine of this embodiment includes the following steps:

[0044] 1. Fix the film body with the thermal pads by the pressing device, and drive the feeding device forward by the power mechanism, so that the thermal pads in the front row are in the position to be grasped; the specific method of fixing the film body is to use the upper pressing block and the lower pressing block of the rear film pressing mechanism to press the rear end of the film body, and drive the upper pressing plate to move downward by the film pressing cylinder of the front film pressing mechanism, so that the front end of the film body is clamped between the upper pressing plate and the lower pressing plate, so as to achieve relative fixation of the film body and the front film pressing mechanism and the rear film pressing mechanism;

[0045] 2. The material grabbing robot moves, sucks the thermal pad to be grabbed by the suction cup, and moves the thermal pad to the bottom film between the bottom film unwinding mechanism and the mask unwinding mechanism; the suction cup is connected to the vacuum device, and the suction and release of the thermal pad are achieved by controlling the valve of the vacuum pipeline; the suction cup can suck one thermal pad at a time, or suck a row of multiple thermal pads at the same time, and the number of suction cups is set according to actual usage;

[0046] 3. The mask unwinding mechanism and the bottom film unwinding mechanism unwind synchronously, and the mask, thermal pad and bottom film form a three-layer structure product, and the three-layer structure product is rewound by the rewinding mechanism; after the robot places the product on the bottom film, the CCD camera carried by the robot takes a picture of the product and measures the product size;

[0047] 4. After all the thermal pads in the front row have been moved to the bottom film, the driving mechanism of the pressing device drives the film body with the thermal pads to move forward as a whole, so that the next row of thermal pads are moved to the position to be grabbed; the specific feeding method is to use a stepper motor to drive the front film pressing mechanism to move backward and downward, and the film body passes by the redirecting roller and moves toward the bottom of the worktable with the front film pressing mechanism. Every time the film body moves, the thermal pads on the film body move forward a certain distance for the robot to pick up. This not only improves the feeding efficiency and the accuracy of the feeding position, but also reduces the lateral size of the device, which is convenient for the reasonable arrangement of the structure.

[0048] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by using existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention, and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A thermally conductive pad laminating machine, characterized in that: It comprises a frame (1), and a loading station, a material grabbing station and a winding station arranged on the frame, the loading station being provided with a loading device (2) and a power mechanism (5) for driving the loading device to move close to the material grabbing station, the loading device comprising a support frame (109) connected to the power mechanism, and a material pressing device arranged on the support frame; The material grabbing station is provided with a material grabbing manipulator (3) for moving the thermally conductive pad (14) from the loading device to the winding station, and the material grabbing end of the material grabbing manipulator is provided with a suction cup (8) adapted to the thermally conductive pad; The rewinding station is provided with a base film unwinding mechanism (9), a face mask unwinding mechanism (10) and a rewinding mechanism (11); the base film (12) and the face mask are wound around the rewinding mechanism after being unwound; a channel is provided between the base film unwinding mechanism and the face mask unwinding mechanism for a material grabbing manipulator to place the thermal conductive pad on the base film; The material pressing device comprises a workbench (105) fixedly connected to the support frame, and a rear film pressing mechanism (106) slidably connected to the workbench in the front-to-back direction, a redirecting roller is rotatably arranged at the front end of the workbench, the redirecting roller supports the lower surface of the film body (104) where the thermal pad is located, and a front film pressing mechanism is arranged at the front side of the redirecting roller; the material pressing device also comprises a driving mechanism for driving the front film pressing mechanism to move toward the bottom of the workbench; The front film pressing mechanism comprises an upper pressing plate (102), a lower pressing plate (101) and a film pressing cylinder (111), the cylinder body of the film pressing cylinder is fixedly connected to the lower pressing plate, the piston rod of the film pressing cylinder passes through the lower pressing plate upwards, and the upper end of the piston rod of the film pressing cylinder is connected to the upper pressing plate; The rear film pressing mechanism comprises a lower pressing block slidably connected to the working table, and an upper pressing block fixedly connected to the lower pressing block through bolts. A guide rail adapted to the lower pressing block is fixedly arranged on the working table.

2. The thermally conductive pad laminating machine according to claim 1, characterized in that: The material grabbing robot is also equipped with a CCD camera (7) facing vertically downward.

3. The thermally conductive pad laminating machine according to claim 2, characterized in that: There are two loading stations, located on the left and right sides of the grabbing robot.

4. The thermally conductive pad laminating machine according to claim 1, characterized in that: The facial mask unwinding mechanism (10) is located between the base film unwinding mechanism (9) and the rewinding mechanism (11), and a pressure roller (15) is provided between the facial mask unwinding mechanism and the rewinding mechanism. The base film and the facial mask extend upward to the rewinding mechanism after passing through the bottom of the pressure roller.

5. The thermally conductive pad laminating machine according to claim 1, characterized in that: The bottom surface of the upper pressing plate and the top surface of the lower pressing plate are respectively provided with anti-slip grooves.

6. The thermally conductive pad laminating machine according to claim 1, characterized in that: The driving mechanism comprises an annular belt (107) rotatably arranged on a support frame and a motor (110) driving the annular belt to rotate. The front film pressing mechanism and the rear film pressing mechanism are both fixedly connected to the annular belt.

7. A coating method using the thermally conductive pad coating machine according to any one of claims 1 to 6, characterized in that: The steps include: (1) The film body with the thermal conductive pads is fixed by the pressing device, and the feeding device is driven forward by the power mechanism so that the front row of thermal conductive pads are in the position to be grasped; (2) The material grabbing robot moves to suck the thermal pad at the position to be grabbed by the suction cup, and moves the thermal pad to the bottom film between the bottom film unwinding mechanism and the face mask unwinding mechanism; (3) The face mask unwinding mechanism and the bottom film unwinding mechanism unwind synchronously to form a three-layer structure product consisting of the face mask, the thermal conductive pad and the bottom film, and the three-layer structure product is rewound by the rewinding mechanism; (4) After all the thermally conductive gaskets in the front row have been moved to the bottom film, the driving mechanism of the pressing device drives the film body with the thermally conductive gaskets adhered to it to move forward as a whole, so that the next row of thermally conductive gaskets are moved to the position to be grasped.

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