Film coating device for heat-conducting gasket
By designing a linkage mechanism and a cutter, the problem of contamination caused by the idling of the film roll during the coating process of thermal pads was solved, and the control equipment was simplified and the film cutting process was made more efficient.
Patent Information
- Application Number
- CN202423025736.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-09
AI Technical Summary
During the thermal pad coating process, the film roll may become contaminated if it runs idle without a thermal pad being fed, and additional control equipment is required to prevent this.
A linkage mechanism was designed to release the rotation restriction on the film roll only when the thermal pad enters, and to activate the cutter to cut the film through the linkage mechanism, thus avoiding contact between the film and other components.
It effectively prevents film contamination, simplifies control equipment, is easy to operate and highly efficient, and ensures a well-organized cutting process.
Smart Images
Figure CN223560880U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat conduction gasket technical field, concretely is a kind of film device of heat conduction gasket. BACKGROUND
[0002] Heat conduction gasket is the material filled between the air gap between heating device and heat sink or metal base, through physical contact, heat conduction gasket can significantly improve heat conduction efficiency, rapidly transfer heat from heat source to radiator, and then the heat is dissipated to the environment by radiator, thereby avoiding overheating problem, protecting electronic components from damage.
[0003] Heat conduction gasket is widely used in power supply equipment, LED lighting, automotive electronics, communication equipment, storage equipment, network terminal, consumer electronics and high-performance computing units such as CPU and GPU, especially in 5G mobile phone, notebook computer, VR / AR equipment, communication base station and automotive electronics and other high heat density environment, heat conduction gasket is an indispensable heat dissipation solution.
[0004] For example, the heat conduction gasket of graphene material, because the thermal conductivity of graphene in the horizontal direction is much larger than that in the vertical direction, so during mass production, graphene sheet needs to be cut into strips first and then arranged vertically, so that the surface with high thermal conductivity is parallel to the vertical direction. At present, when the operator processes the heat conduction gasket, in order to avoid pollution to the surface of the heat conduction gasket, the surface of the heat conduction gasket needs to be coated with film at this time, but some equipment may still rotate the film roll during coating without feeding at the feeding port, which may cause the adhesive surface of the film to contact other parts and be contaminated. Additional control equipment is needed to control it.
[0005] Therefore, the present application is proposed. UTILITY MODEL CONTENT
[0006] The utility model aims at providing a kind of film device of heat conduction gasket to solve the problems raised in the above background.
[0007] To solve the above technical problems, the film device of heat conduction gasket provided by the utility model comprises a film device body and a conveying belt rotatably connected to the inner side wall bottom end of the film device body. The length direction of the conveying belt is consistent with the length direction of the film device body. A sliding groove one is formed on one end of the two inner side walls of the film device body away from the conveying belt. A sliding block one is slidably connected in the sliding groove one. A spring telescopic rod is fixedly connected to the top of the sliding block one. An identical feeding roller is rotatably connected to the side wall of each sliding block one close to each other. A linkage mechanism is arranged on the side wall of each sliding block one away from each other, and the linkage mechanism is located in the film device body.
[0008] Further, the feeding roller is tangent to the top of the conveying belt, the top of the conveying belt away from the feeding roller is provided with a film winding drum, two ends of the film winding drum are rotationally connected to the two inner side walls of the film coating device body, the film winding drum is not in contact with the conveying belt and the feeding roller, the linkage mechanism comprises a fixed rod fixedly connected to the side wall of the sliding block away from the feeding roller, the top of the fixed rod abuts against a rotating rod, the rotating rod is "L"-shaped in transverse section, the vertical part of the rotating rod abuts against the fixed rod and the end of the rotating rod away from the fixed rod is downwardly and obliquely arranged.
[0009] Further, the horizontal part of the rotating rod is arranged away from the fixed rod and towards the film winding drum, an axis one is arranged inside the film winding drum and penetrates the film winding drum in the axial direction, two ends of the axis one are rotationally connected to the two inner side walls of the film coating device body, a ratchet wheel is sleeved on the outer arc wall of the end of the axis one close to the linkage mechanism, a pawl is engagedly connected to the bottom of the ratchet wheel, one end of the axis one is provided with a driving motor, the output end of the driving motor and the end of the axis one close to each other are fixedly connected with a magnetic coupler.
[0010] Further, the end of the pawl away from the ratchet wheel is rotationally connected to the inner side wall of the film coating device body, the bottom of the pawl is fixedly connected with a fixed ring on the side close to the ratchet wheel, the fixed ring is located directly above the horizontal part of the rotating rod, a fixed pull rope is sleeved in the fixed ring, the end of the fixed pull rope away from the fixed ring is fixedly connected to the rotating rod, and the rotating connection part of the pawl and the film coating device body is provided with a torsion spring.
[0011] Further, the two inner side walls of the film coating device body are provided with an inclined chute corresponding to the side of the film winding drum away from the feeding roller, a cutter is slidingly connected in the inclined chute, the two inner side walls of the film coating device body are provided with a second sliding groove away from the inclined chute, the inclined chute is located between the first sliding groove and the second sliding groove, a fixed plate is slidingly connected in the second sliding groove, the same pre-pressing roller is rotationally connected to the side of the two fixed plates close to the film winding drum on the side wall close to each other, the same hot pressing roller is rotationally connected to the side of the two fixed plates away from the film winding drum on the side wall close to each other, a hydraulic rod is fixedly connected to the bottom inner wall of the second sliding groove at the center of the bottom of the fixed plate, and the end of the hydraulic rod away from the fixed plate is fixedly connected to the bottom inner wall of the second sliding groove.
[0012] Further, the film winding drum is provided with a film outside, the film extends from the film winding drum to below the pre-pressing roller, the cutter is located above the film extension part and the cutter is located between the pre-pressing roller and the film winding drum, the cutting edge of the cutter is arranged perpendicular to the film extension part, and a fixed roller is arranged below the film extension part corresponding to the position of the cutter.
[0013] Furthermore, both ends of the cutter are fixedly connected to sliders two. The end of slider two away from the cutter is slidably connected to the inclined groove. The length direction of the inclined groove is perpendicular to the film extension. A magnetic block is fixedly connected to the side of slider two away from the cutter. The magnetic block is located in the inclined groove. A return spring is fixedly connected to the side wall of the magnetic block away from the film roll. The end of the return spring away from the magnetic block is fixedly connected to the inner wall of the inclined groove.
[0014] Furthermore, an electromagnet is provided on the side of the magnetic block away from the return spring. The polarity of the electromagnet is the same as that of the magnetic block. The circuit for controlling the electromagnet is located inside the coating device and below the end of the rotating rod away from the fixed rod.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. Through the linkage mechanism, the rotation restriction on the film roll will only be released when a heat-conducting pad enters at the feed roller. This avoids the film roll from spinning idly when there is no heat-conducting pad, causing the film to extend and come into contact with other parts and become contaminated. At the same time, the simple structure eliminates the need for additional control equipment, making operation simple and efficient.
[0017] 2. When the linkage mechanism is started, the circuit controlling the electromagnet will be activated to move the cutter away from the film. After the heat-conducting pad has completely passed the feed roller, the linkage mechanism will reset, causing the cutter to move towards the film extension and cut the film. The whole process is orderly and the structure is compact. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of a coating device for a thermal pad;
[0019] Figure 2 This is a schematic diagram of the internal structure of a coating device for a thermal pad;
[0020] Figure 3 for Figure 2 Internal structural cross-sectional view at point A;
[0021] Figure 4 for Figure 2 Enlarged view of the structure at point B;
[0022] Figure 5 This is a simplified diagram of the triggering relationship between an electromagnet and a rotating rod in a coating device for a thermally conductive pad.
[0023] In the picture:
[0024] 10. Film coating device body; 11. Conveyor belt; 12. Hot press roller; 13. Pre-press roller; 14. Fixing plate;
[0025] 15. Hydraulic rod;
[0026] 20, feed roller; 21, slider one; 22, film roll; 23, cutter; 24, slider two;
[0027] 25, magnetic block; 26, return spring;
[0028] 30, fixed rod; 31, rotating rod; 32, pawl; 33, ratchet; 34, magnetic coupler. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0030] Please refer to Figures 1-5 The utility model provides a kind of film covering device of heat-conducting gasket: including film covering device body 10 and the transmission belt 11 of rotation connection in the bottom end of the inner side wall of film covering device body 10, the length direction of transmission belt 11 is consistent with the length direction of film covering device body 10, the end of the two inner side walls of film covering device body 10 away from transmission belt 11 is equipped with sliding slot one, sliding block one 21 is slidably connected in sliding slot one, spring telescopic rod is fixedly connected at the top of sliding block one 21, the same feed roller 20 is rotationally connected on the side wall of two sliding block one 21 mutually close, and the side wall of two sliding block one 21 mutually away is equipped with linkage mechanism, and linkage mechanism is located in film covering device body 10.
[0031] It needs to be explained that: film covering device body 10 shown in the drawing is in the state of removing top cover, and transmission belt 11 is arranged at the bottom end inside film covering device body 10, and the driving shaft of transmission belt 11 is rotationally connected to the inner wall of film covering device body 10.
[0032] The end of spring telescopic rod away from sliding block one 21 is fixedly connected to the top inner wall of sliding slot one, in initial state, the bottom of feed roller 20 is tangent to the top of transmission belt 11, when heat-conducting gasket enters from feed roller 20, heat-conducting gasket lifts feed roller 20, and sliding block one 21 is lifted to drive linkage mechanism to operate, feed roller 20 is only used as auxiliary feeding, and the mass of itself is lighter, and the elastic coefficient of spring telescopic rod is lower, on the one hand, linkage mechanism is triggered, and on the other hand, heat-conducting gasket is avoided to be pressed.
[0033] Please refer to Figures 1-5The utility model provides a technical scheme: the feeding roller 20 is tangent with the top of conveyer belt 11, is equipped with the film reel 22 on the side of top of conveyer belt 11 far from feeding roller 20, the both ends of film reel 22 are rotatively connected on the two inner side walls of film coating device body 10 respectively, film reel 22 does not contact with conveyer belt 11 and feeding roller 20, linkage mechanism includes the fixed link 30 of fixed connection on the side wall of sliding block one 21 far from feeding roller 20, the top of fixed link 30 abuts with rotating rod 31, the horizontal section of rotating rod 31 is '' L '' shape, the vertical portion of rotating rod 31 is abutted with fixed link 30 and the end of rotating rod 31 far from fixed link 30 is set down obliquely.
[0034] It should be noted that: the inner side wall of film coating device body 10 is equipped with the article groove, linkage mechanism is located in the article groove, the side wall of rotating rod 31 is equipped with the rotating shaft two, the rotating shaft two is fixedly connected on the inner wall of article groove, and the rotating shaft two is arranged on the side close to fixed link 30, so that when sliding block one 21 is lifted, fixed link 30 is abutted with rotating rod 31 and pushes rotating rod 31 to rotate, since the rotating shaft two is closer to fixed link 30, so fixed link 30 only needs to lift a small section of rotating rod 31, and the end of rotating rod 31 far from fixed link 30 will produce greater swing.
[0035] Please refer to Figures 1-5 The utility model provides a technical scheme: the horizontal portion of rotating rod 31 is set up far from fixed link 30 and is set up towards film reel 22, the rotating shaft one is equipped in the inside of film reel 22 along the axial direction, the both ends of rotating shaft one are rotatively connected with the two inner side walls of film coating device body 10 respectively, the outer arc wall of the end of rotating shaft one close to linkage mechanism is sleeved with ratchet wheel 33, ratchet wheel 33 bottom is engaged with the pawl 32, and one end of rotating shaft one is equipped with driving motor, and the end of rotating shaft one close to each other with driving motor output is fixedly connected with magnetic coupler 34.
[0036] It should be noted that: film reel 22 is sleeved on the rotating shaft two, the rotating shaft two is detachably connected with the inner side wall of film coating device body 10, and linkage mechanism controls the rotation of pawl 32, when linkage mechanism starts, pawl 32 does not engage with ratchet wheel 33, and rotating shaft two can receive the output of driving motor under the action of magnetic coupler 34, and when linkage mechanism does not start, pawl 32 engages with ratchet wheel 33, and due to the action of magnetic coupler 34, even if not stopping, film reel 22 will not rotate;
[0037] In a possible embodiment, the driving motor output end is fixedly connected with a large belt wheel, the transmission belt 11 transmission shaft side wall is also fixedly connected with a small belt wheel, the two belt wheels are sleeved with the same belt in the wheel groove, and then when the film roll 22 stops rotating, the driving motor can still drive the transmission belt 11 to rotate through the belt wheel, and the rotating speed of the film roll 22 is relatively slow relative to the transmission belt 11, that is, in the case of not stopping, as long as there is no feeding, the film roll 22 will not rotate;
[0038] In addition, since the feeding roller 20 is away from the film roll 22 at the film outlet, the speed difference is used to ensure that the film can be completely laid on the surface of the heat-conducting gasket, and in a possible embodiment, the feeding roller 20 is arranged close to the film roll 22, and the distance is further reduced, that is, the distance between the film cutting position of the cutter 23 and the top of the transmission belt 11 is equal to the distance between the projection of the feeding roller 20 to the film cutting position of the cutter 23, and then only the same structure of the belt wheel is needed, and further, when the tail end of the heat-conducting gasket completely passes through the feeding roller 20, the linkage mechanism resets the cutter 23 to cut the film, and the distance of the cut film that has not contacted the heat-conducting gasket is substantially the same as the distance of the remaining film-free heat-conducting gasket.
[0039] Please refer to Figures 1-5 The utility model provides a technical scheme: the one end of the pawl 32 away from the ratchet wheel 33 is rotationally connected on the inner side wall of the film coating device body 10, the bottom of the pawl 32 is fixedly connected with a fixed ring on the side close to the ratchet wheel 33, the fixed ring is located above the horizontal part of the rotating rod 31, a fixed pull rope is sleeved in the fixed ring, the one end of the fixed pull rope away from the fixed ring is fixedly connected on the rotating rod 31, and the rotating connection place of the pawl 32 and the film coating device body 10 is equipped with a torsion spring.
[0040] It should be noted that: when the linkage mechanism is started, the fixed rod 30 lifts the rotating rod 31, the other end of the rotating rod 31 immediately drops, the pawl 32 is pulled by the fixed pull rope to make it no longer mesh with the ratchet wheel 33, so that the rotating shaft two can drive the film roll 22 to rotate.
[0041] Please refer to Figures 1-5The utility model provides a technical scheme: the two inner side walls of film device body 10 are equipped with inclined chute corresponding to the one side of film reel 22 far from feed roller 20, and the inclined chute is slidably connected with cutter 23, and the one side of the two inner side walls of film device body 10 far from inclined chute is equipped with groove no.
[0042] Need to explain: the fixed plate 14 is equipped with electric heating assembly, and the hot press roller 12 is hollow structure, and the electric heating wire is laid on the inner arc wall of hot press roller 12, and the hot press roller 12 can better film to the heat conducting gasket, the pre-press roller 13 is guided to the extension direction of film on one hand, and the film is pre-pressed to discharge gas on one hand, and the hydraulic rod 15 is used for controlling the lifting of fixed plate 14 to control the lifting of hot press roller 12 and pre-press roller 13, and the film process is controllable.
[0043] Please refer to Figures 1-5 The utility model provides a technical scheme: the film is wound on the outer side of film reel 22, and the film extends from film reel 22 to below pre-press roller 13, cutter 23 is located above film extension and between pre-press roller 13 and film reel 22, the cutting edge of cutter 23 is perpendicular to film extension, and fixed roller is arranged below film extension corresponding to the position of cutter 23.
[0044] Need to explain: cutter 23 is used to cut film when linkage mechanism resets after single heat conducting gasket film coating is completed, and the both ends of fixed roller are fixedly connected to the inner side wall of film device body 10 and are used to support cutter 23 when cutting.
[0045] Please refer to Figures 1-5 The utility model provides a technical scheme: the both ends of cutter 23 are fixedly connected with sliding block no. 2 24, and the one end of sliding block no. 2 24 far from cutter 23 is slidably connected in inclined chute, and the length direction of inclined chute is perpendicular to film extension, and the one side of sliding block no. 2 24 far from cutter 23 is fixedly connected with magnetic block 25, and magnetic block 25 is located in inclined chute, and reset spring 26 is fixedly connected to the inner wall of inclined chute on the one side wall of magnetic block 25 far from film reel 22.
[0046] Need to explain: reset spring 26 is used to store energy when cutter 23 is far from film.
[0047] Please refer to Figure 5 The utility model provides a technical scheme: the electromagnet is equipped with the same polarity as the magnetic block 25 on the side of the magnetic block 25 away from the reset spring 26, and the circuit for controlling the electromagnet is located in the film coating device body 10 and below the end of the rotating rod 31 away from the fixed rod 30.
[0048] It should be noted that: Figure 5 The circuit for controlling the electromagnet is also located in the film coating device body 10, and the circuit is located directly below the end of the rotating rod 31 away from the fixed rod 30, and there is a gap below the end of the rotating rod 31 away from the fixed rod 30, and the two ends of the gap are fixed with copper sheets one, and the end of the rotating rod 31 bottom away from the fixed rod 30 is fixedly connected with a copper sheet two, and the rotating rod 31 itself is made of insulating material.
[0049] When the linkage mechanism is triggered, the end of the rotating rod 31 away from the fixed rod 30 moves downward, at this time, the copper sheet two is inserted between the two copper sheets one, and the whole circuit is conducted, so that the electromagnet can generate a magnetic field and repel the magnetic block 25 to drive the magnetic block 25 to move, and the reset spring 26 stores force, when the linkage mechanism resets, the copper sheet two is away from the copper sheet one, the circuit is disconnected, the magnetic field of the electromagnet disappears, the reset spring 26 drives the magnetic block 25 to reset, and then the cutter 23 cuts the film.
[0050] Working principle:
[0051] The operator puts the heat-conducting gasket into the gap between the feeding roller 20 and the transmission belt 11, the linkage mechanism is triggered, the electromagnet is conducted to push the cutter 23 away from the film, the ratchet 32 is separated from the ratchet wheel 33, the film reel 22 rotates, the film extends, when the heat-conducting gasket moves to the film, it carries the film, the hydraulic rod 15 descends, the heat roller 12 and the pre-pressing roller 13 press the film downward, and the film coating effect is better through the pre-pressing exhaust and heat-pressing mode.
Claims
1. A coating device for a thermally conductive pad, comprising a coating device body (10) and a conveyor belt (11) rotatably connected to the bottom end of the inner sidewall of the coating device body (10), wherein the length direction of the conveyor belt (11) is consistent with the length direction of the coating device body (10), characterized in that: The film device body (10) is provided with a sliding groove one on the inner side wall away from the transmission belt (11), and a sliding block one (21) is slidably connected in the sliding groove one.
2. The apparatus according to claim 1, wherein: The feeding roller (20) is tangent to the top of the transmission belt (11), and a film roll (22) is arranged on the side of the top of the transmission belt (11) away from the feeding roller (20). The two ends of the film roll (22) are rotatably connected to the two inner side walls of the film device body (10), and the film roll (22) does not contact the transmission belt (11) and the feeding roller (20). The linkage mechanism comprises a fixed rod (30) fixedly connected to the side wall of the sliding block one (21) away from the feeding roller (20), and the top of the fixed rod (30) abuts against a rotating rod (31). The horizontal section of the rotating rod (31) is "L" shaped, the vertical part of the rotating rod (31) abuts against the fixed rod (30), and the end of the rotating rod (31) away from the fixed rod (30) is inclined downward.
3. The apparatus according to claim 2, wherein: The horizontal part of the rotating rod (31) is arranged away from the fixed rod (30) and faces the film roll (22). An axis one is arranged in the film roll (22) and penetrates the film roll (22) in the axial direction. The two ends of the axis one are rotatably connected to the two inner side walls of the film device body (10). A ratchet wheel (33) is sleeved on the outer arc wall of the end of the axis one close to the linkage mechanism. A pawl (32) is engagedly connected to the bottom of the ratchet wheel (33). A drive motor is arranged at one end of the axis one. A magnetic coupler (34) is fixedly connected to the end of the axis one close to each other.
4. The apparatus according to claim 3, wherein the apparatus is characterized by: The end of the pawl (32) away from the ratchet wheel (33) is rotatably connected to the inner side wall of the film device body (10). A fixed ring is fixedly connected to the side of the bottom of the pawl (32) close to the ratchet wheel (33). The fixed ring is located directly above the horizontal part of the rotating rod (31). A fixed pull rope is sleeved in the fixed ring. The end of the fixed pull rope away from the fixed ring is fixedly connected to the rotating rod (31). A torsion spring is arranged at the rotating connection between the pawl (32) and the film device body (10).
5. The apparatus according to claim 2, wherein the apparatus is characterized by: The film covering device body (10) is provided with an inclined chute on both inner side walls corresponding to the side of the film roll (22) away from the feeding roller (20), a cutter (23) is slidably connected in the inclined chute, the side of both inner side walls of the film covering device body (10) away from the inclined chute is provided with a chute two, the inclined chute is located between the chute one and the chute two, a fixing plate (14) is slidably connected in the chute two, the same pre-pressing roller (13) is rotatably connected on the side of the mutually approaching side wall of both the fixing plates (14) close to the film roll (22), the same hot pressing roller (12) is rotatably connected on the side of the mutually approaching side wall of both the fixing plates (14) away from the film roll (22), the hydraulic rod (15) is fixedly connected at the bottom center of the fixing plate (14), and one end of the hydraulic rod (15) away from the fixing plate (14) is fixedly connected to the bottom inner wall of the chute two.
6. The apparatus according to claim 5, wherein: The film roll (22) is provided with a film outside, the film extends from the film roll (22) to below the pre-pressing roller (13), the cutter (23) is located above the film extension part and between the pre-pressing roller (13) and the film roll (22), the cutting edge of the cutter (23) is perpendicular to the film extension part, and a fixed roller is arranged below the film extension part corresponding to the position of the cutter (23).
7. The apparatus according to claim 6, wherein the apparatus is characterized by: Both ends of the cutter (23) are fixedly connected with sliding blocks two (24), one end of the sliding block two (24) away from the cutter (23) is slidably connected in the inclined chute, the length direction of the inclined chute is perpendicular to the film extension part, the side of the sliding block two (24) away from the cutter (23) is fixedly connected with a magnetic block (25), the magnetic block (25) is located in the inclined chute, the side wall of the magnetic block (25) away from the film roll (22) is fixedly connected with a return spring (26), and one end of the return spring (26) away from the magnetic block (25) is fixedly connected to the inner wall of the inclined chute.
8. The apparatus according to claim 7, wherein the apparatus is characterized by: The side of the magnetic block (25) away from the return spring (26) is provided with an electromagnet, the polarity of the electromagnet is the same as that of the magnetic block (25), the circuit for controlling the electromagnet is located in the film covering device body (10) and below the end of the rotating rod (31) away from the fixing rod (30).