Hot-pressing device for heat-conducting carbon fiber plate

Abstract

The utility model discloses a heat-conducting carbon fiber plate hot-pressing device, which belongs to the technical field of carbon fiber plate hot-pressing, and adopts the technical scheme that the heat-conducting carbon fiber plate hot-pressing device comprises a hot press, a lower pressing plate is arranged on the bottom side in the hot press, a pushing and pressing structure is arranged on the top side in the hot press, and an upper pressing plate is arranged at the bottom of the pushing and pressing structure; through the arrangement of the cooling mechanism, cooling liquid in the cooling liquid box enters the coil pipes in the upper pressing plate and the lower pressing plate through the output pipe under the action of the suction structure, circularly flows and then returns to the cooling liquid box through the return pipe, a cooling liquid circulation loop is formed, and heat of the upper pressing plate and the lower pressing plate can be effectively taken away through the design; the temperature of the upper pressing plate and the temperature of the lower pressing plate are kept consistent in the hot pressing process, uneven heating of the carbon fiber plate caused by temperature difference is avoided, the good resin curing effect is ensured, the combination degree of fibers and resin is optimized, and therefore the heat conduction performance, the mechanical performance and other key quality indexes of the carbon fiber plate are stably improved.

Description

Technical Field

[0001] This utility model relates to the field of hot pressing technology of carbon fiber plates, and in particular to a hot pressing device for thermally conductive carbon fiber plates. Background Technology

[0002] Thermally conductive carbon fiber sheet is a thermally conductive pad made primarily of thermally conductive carbon fiber. It is used between heat-generating components and heat sinks to fill the gaps between them, thereby accelerating the heat dissipation of electronic devices and ensuring the performance and lifespan of electronic products. In the hot pressing of thermally conductive carbon fiber sheet, the adhesive-coated multi-layer thermally conductive carbon fiber sheet needs to be hot-pressed, which requires the use of a hot pressing device.

[0003] The current hot pressing device directly presses the upper and lower pressure plates together and heats the upper and lower pressure plates to achieve the hot pressing effect. However, after processing the first one, the second carbon fiber plate to be processed needs to be placed on the lower pressure plate. At this time, the temperature of the lower pressure plate is too high, which may cause the thermally conductive carbon fiber plate to deform, thus potentially requiring the thermally conductive carbon fiber plate to undergo hot pressing treatment.

[0004] An existing patent (publication number: CN220946786U) discloses a hot pressing device for thermally conductive carbon fiber plates. This utility model effectively prevents the thermally conductive carbon fiber plates from deforming due to overheating of the lower pressure plate, thereby effectively improving the efficiency of hot pressing the thermally conductive carbon fiber plates.

[0005] To address the aforementioned issues, existing patents offer solutions. However, these patents only address heat dissipation for the lower pressure plate to prevent deformation of the carbon fiber sheet when placed on it due to overheating. In practice, if only the lower pressure plate is cooled while the upper pressure plate is ignored, the temperatures of the upper and lower pressure plates will be inconsistent. During the subsequent hot-pressing process, when the carbon fiber sheet is placed on top of the lower pressure plate, this temperature inconsistency may cause uneven heating of the carbon fiber sheet, affecting the resin curing effect, the degree of fiber-resin bonding, and consequently the thermal conductivity, mechanical properties, and other quality indicators of the carbon fiber sheet. It may also lead to unstable hot-pressing cycles, ultimately affecting the hot-pressing effect.

[0006] To address this, a thermally conductive carbon fiber plate hot pressing device is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a thermally conductive carbon fiber plate hot pressing device that solves the problem in the aforementioned patent where only the lower pressure plate is cooled to prevent deformation of the carbon fiber plate when it is placed on an overheated lower pressure plate. However, in actual operation, if only the lower pressure plate is cooled while the upper pressure plate is ignored, the temperature of the upper and lower pressure plates will be inconsistent. When the carbon fiber plate is placed on top of the lower pressure plate for hot pressing, the temperature inconsistency between the lower and upper pressure plates may cause uneven heating of the carbon fiber plate, affecting the resin curing effect, the degree of bonding between the fiber and the resin, and thus affecting the thermal conductivity, mechanical properties and other quality indicators of the carbon fiber plate. It may also lead to unstable hot pressing cycle, ultimately affecting the hot pressing effect.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a thermally conductive carbon fiber plate hot pressing device, comprising a hot press, a lower pressure plate provided on the bottom side inside the hot press, a pushing structure provided on the top side inside the hot press, an upper pressure plate provided at the bottom of the pushing structure, an electric heating tube provided inside both the upper and lower pressure plates, a cooling mechanism provided inside both the upper and lower pressure plates, and a blowing assembly provided on the rear side inside the hot press;

[0009] The cooling mechanism includes a cold liquid tank bolted to the rear of the hot press. A suction structure is provided on the top of the cold liquid tank, and an output pipe is connected to the top of the suction structure. Both the lower and upper pressure plates are equipped with coils. The inlet end of the bottom coil is connected to the front of the output pipe, and the inlet and outlet ends of the top coil are connected to elastic tubes. The top of the left elastic tube is connected to the bottom of the output pipe, and the top of the right elastic tube is connected to a return pipe. The front of the return pipe is connected to the outlet end of the bottom coil, and the bottom of the return pipe is connected to the top of the cold liquid tank.

[0010] Preferably, the blowing assembly includes a suction hopper embedded in the rear side of the hot press, the suction hopper being located in front of the output pipe and the return pipe.

[0011] Preferably, the suction hopper is equipped with a blower fan located on the rear side between the lower pressure plate and the upper pressure plate.

[0012] Preferably, a protective net is bolted to the front side of the suction hopper, and the protective net is located in front of the blower.

[0013] Preferably, the suction structure includes a water pump bolted to the top of the cold liquid tank, the suction end of the water pump being connected to a suction pipe, and the bottom of the suction pipe penetrating the top of the cold liquid tank and extending into the interior.

[0014] Preferably, the output end of the water pump is connected to an output valve, and the output valve is connected to an output pipe.

[0015] Preferably, the pushing structure includes an electric push rod bolted to the top side inside the hot press, a connecting plate bolted to the bottom of the electric push rod, and the bottom of the connecting plate bolted to the top of the upper pressure plate.

[0016] Preferably, a controller is bolted to the front of the hot press, and the controller is electrically connected to the electric heating tube, the blower, the water pump, the output valve and the electric push rod respectively.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application incorporates a cooling mechanism. Under the action of the suction structure, the coolant in the cold liquid tank enters the coils inside the upper and lower pressure plates through the output pipe. After circulating, it returns to the cold liquid tank through the return pipe, forming a coolant circulation loop. This design can effectively remove the heat from the upper and lower pressure plates, ensuring that the upper and lower pressure plates maintain the same temperature during the hot pressing process. This avoids uneven heating of the carbon fiber sheet due to temperature differences, ensures good resin curing effect, optimizes the bonding degree between fiber and resin, and thus steadily improves the key quality indicators such as the thermal conductivity and mechanical properties of the carbon fiber sheet.

[0019] 2. By setting up a blowing component, this application can blow air to the upper and lower pressure plates to dissipate heat after hot pressing, thereby accelerating the heat dissipation rate and enabling the upper and lower pressure plates to drop to the appropriate temperature more quickly. This shortens the hot pressing cycle, improves the overall working efficiency of the hot pressing device, and meets the needs of high-efficiency production. At the same time, rapid cooling also helps to reduce equipment waiting time, improve equipment utilization, and bring higher economic benefits to enterprise production. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the thermally conductive carbon fiber plate hot pressing device of this utility model;

[0021] Figure 2 This is a structural diagram of the hot press of this utility model;

[0022] Figure 3 This is a structural diagram of the cooling mechanism of this utility model;

[0023] Figure 4 This is a structural diagram of the suction structure of this utility model;

[0024] Figure 5 This is a structural diagram of the blower assembly of this utility model;

[0025] Figure 6 This is a structural diagram of the push-press structure of this utility model.

[0026] In the diagram, 1. Hot press; 2. Lower pressure plate; 3. Pushing structure; 301. Electric push rod; 302. Connecting plate; 4. Upper pressure plate; 5. Electric heating tube; 6. Cooling mechanism; 601. Cold liquid tank; 602. Suction structure; 6021. Water pump; 6022. Suction pipe; 6023. Output valve; 603. Output pipe; 604. Coil; 605. Elastic tube; 606. Return pipe; 7. Blowing assembly; 701. Suction hopper; 702. Blowing fan; 703. Protective net; 8. Controller. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-6 The present invention provides the following technical solution:

[0029] A thermally conductive carbon fiber plate hot pressing device includes a hot press 1, a lower pressure plate 2 is provided on the bottom side inside the hot press 1, a pushing structure 3 is provided on the top side inside the hot press 1, an upper pressure plate 4 is provided at the bottom of the pushing structure 3, an electric heating tube 5 is provided inside both the upper pressure plate 4 and the lower pressure plate 2, a cooling mechanism 6 is provided inside both the upper pressure plate 4 and the lower pressure plate 2, and a blowing assembly 7 is provided on the rear side inside the hot press 1.

[0030] The cooling mechanism 6 includes a cold liquid tank 601 bolted to the rear side of the hot press 1. A suction structure 602 is provided on the top of the cold liquid tank 601. An output pipe 603 is connected to the top of the suction structure 602. Both the lower pressure plate 2 and the upper pressure plate 4 are equipped with coils 604. The inlet end of the bottom coil 604 is connected to the front side of the output pipe 603. Both the inlet end and the outlet end of the top coil 604 are connected to elastic pipes 605. The top of the left elastic pipe 605 is connected to the bottom of the output pipe 603. The top of the right elastic pipe 605 is connected to a return pipe 606. The front side of the return pipe 606 is connected to the outlet end of the bottom coil 604. The bottom of the return pipe 606 is connected to the top of the cold liquid tank 601.

[0031] In this embodiment, by installing electric heating tubes 5 and coils 604 inside both the upper pressure plate 4 and the lower pressure plate 2, the heating tubes provide the heat required for hot pressing. The coils 604 and the coolant tank 601 form a coolant circulation system through the output pipe 603, the elastic pipe 605, and the return pipe 606. This system can precisely regulate the temperature of the upper pressure plate 4 and the lower pressure plate 2, ensuring that the temperature remains consistent throughout the hot pressing process. This guarantees uniform heating of the carbon fiber sheet, greatly improving the thermal conductivity, mechanical properties, and other quality indicators of the carbon fiber sheet. It effectively solves the product quality problems caused by uneven temperature. At the same time, the air blowing assembly 7 at the rear of the hot press 1 can immediately blow air onto the upper pressure plate 4 and the lower pressure plate 2 after the hot pressing is completed. The air blowing cooling mechanism 6 works in conjunction with the cooling mechanism 6 to significantly accelerate the cooling speed of the upper pressure plate 4 and the lower pressure plate 2, greatly shortening the hot pressing cycle and improving production efficiency. This also helps the equipment quickly enter the next round of work preparation, improving equipment utilization and creating higher economic benefits for the enterprise. Furthermore, the pushing structure 3 ensures that the upper pressure plate 4 applies stable pressure. In conjunction with the heating, cooling and air blowing components 7 of the upper pressure plate 4 and the lower pressure plate 2, the entire hot pressing device can operate stably in different working stages. The coordinated work of each component ensures the continuity and stability of the production process, reduces the risk of equipment failure, and improves the consistency and stability of product quality.

[0032] Specifically, such as Figure 5 As shown, the blower assembly 7 includes a suction hopper 701 embedded in the rear side of the hot press 1, and the suction hopper 701 is located in front of the output pipe 603 and the return pipe 606.

[0033] Specifically, such as Figure 5 As shown, a blower 702 is installed inside the suction hopper 701, and the blower 702 is located on the rear side between the lower pressure plate 2 and the upper pressure plate 4.

[0034] Specifically, such as Figure 5 As shown, a protective net 703 is bolted to the front side of the suction duct 701, and the protective net 703 is located in front of the blower 702.

[0035] In this embodiment: by embedding the suction hopper 701 behind the hot press 1 and between the upper pressure plate 4 and the lower pressure plate 2, the internal blower 702 can quickly blow air to cool the upper pressure plate 4 and the lower pressure plate 2 after hot pressing. Its position design allows the blown air to evenly cover the upper pressure plate 4 and the lower pressure plate 2, accelerating the heat dissipation speed and shortening the time for the upper pressure plate 4 and the lower pressure plate 2 to recover to a suitable temperature, thereby effectively improving the overall working efficiency of the hot pressing device, reducing the hot pressing cycle, and increasing production capacity. At the same time, the protective net 703 is bolted to the front of the suction hopper 701 and located in front of the blower 702, which can effectively prevent foreign objects from entering the suction hopper 701 and damaging the blower 702, ensuring the stable operation of the blower 702.

[0036] Specifically, such as Figure 4 As shown, the suction structure 602 includes a water pump 6021 bolted to the top of the cold liquid tank 601. The absorption end of the water pump 6021 is connected to a suction pipe 6022. The bottom of the suction pipe 6022 penetrates the top of the cold liquid tank 601 and extends into the interior.

[0037] Specifically, such as Figure 4 As shown, the output end of the water pump 6021 is connected to the output valve 6023, and the output valve 6023 is connected to the output pipe 603.

[0038] In this embodiment: the water pump 6021 of the suction structure 602, together with the suction pipe 6022, draws coolant from the cold liquid tank 601. The output valve 6023 can precisely control the output flow rate of the coolant, which allows the coolant to enter the coil 604 in the upper pressure plate 4 and the lower pressure plate 2 at a suitable flow rate, ensuring a stable and effective cooling process. This avoids the cooling effect being affected by excessive or insufficient coolant flow, and ensures that the temperature of the upper pressure plate 4 and the lower pressure plate 2 can be accurately controlled within the required range, thereby improving the accuracy and stability of temperature control.

[0039] Specifically, such as Figure 6 As shown, the pressing structure 3 includes an electric push rod 301 bolted to the top side inside the hot press 1. A connecting plate 302 is bolted to the bottom of the electric push rod 301, and the bottom of the connecting plate 302 is bolted to the top of the upper pressure plate 4.

[0040] Specifically, such as Figure 1 As shown, a controller 8 is bolted to the front of the hot press 1. The controller 8 is electrically connected to the electric heating tube 5, the blower 702, the water pump 6021, the output valve 6023 and the electric push rod 301 respectively.

[0041] In this embodiment, the downward speed and applied pressure of the upper pressure plate 4 can be precisely controlled by the electric push rod 301. During the hot pressing process, a stable and uniform pressure can be applied to the upper pressure plate 4 according to the process requirements of different carbon fiber plates, ensuring that the carbon fiber plates are heated and cured under appropriate pressure, making the fiber arrangement more compact and orderly, improving the density and strength of the carbon fiber plates, thereby ensuring the consistency and stability of the hot-pressed product quality. The controller 8 is electrically connected to the electric heating tube 5, the blower 702, the water pump 6021, the output valve 6023 and the electric push rod 301 respectively, realizing centralized control of the entire hot pressing device. The operator only needs to set the corresponding parameters on the controller 8, such as hot pressing temperature, pressure, time and cooling rate, and the controller 8 can automatically coordinate the work of each component. This not only improves the convenience and accuracy of operation, but also reduces the impact of human factors on the production process, realizes the automation and intelligence of the hot pressing process, and improves the production efficiency and controllability of product quality.

[0042] Working Principle: In the hot pressing device for thermally conductive carbon fiber plates, the carbon fiber plate to be hot-pressed is first placed on the lower pressure plate 2. The controller 8 sets the required parameters for hot pressing, such as temperature, pressure, and time. The controller 8 then activates the electric heating element 5, which heats the upper pressure plate 4 and the lower pressure plate 2 until they reach the set hot pressing temperature. At this time, the electric push rod 301 in the pressing structure 3, according to the set parameters, drives the upper pressure plate 4 downwards at a precise speed via the connecting plate 302, applying stable and uniform pressure to the carbon fiber plate. This allows the carbon fiber plate to be heated and cured under high temperature and high pressure, resulting in a tight and orderly fiber arrangement, improving its thermal conductivity and mechanical properties. After hot pressing is completed, the controller 8 controls the electric push rod 301 to rise, releasing the pressure on the upper pressure plate 4. Simultaneously, the blower 702 starts, and the suction hopper 701 draws in outside air and blows it onto the upper pressure plate 4 and the lower pressure plate 2 through the blower 702, accelerating the process. Heat dissipation and the protective net 703 effectively prevent foreign objects from entering and damaging the blower 702. At the same time, the water pump 6021 works, drawing coolant from the cold liquid tank 601 through the suction pipe 6022. The output valve 6023 controls the coolant to flow at a suitable speed through the output pipe 603 into the coil 604 inside the upper pressure plate 4 and the lower pressure plate 2. After absorbing heat, the coolant returns to the cold liquid tank 601 through the elastic pipe 605 and the return pipe 606, forming a coolant circulation. This further precisely controls the temperature of the upper and lower pressure plates 2. Throughout the process, the controller 8 monitors and coordinates the operation of components such as the electric heating tube 5, the blower 702, the water pump 6021, the output valve 6023, and the electric push rod 301 in real time. Operators only need to set parameters on the controller 8 to achieve automated and intelligent operation, improving production efficiency, product quality, and equipment stability. The synergistic effect of each component ensures continuous and efficient production, reduces the risk of failure, and creates good benefits for enterprise production.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A thermally conductive carbon fiber plate hot pressing device, comprising a hot press (1), characterized in that: The hot press (1) has a lower pressure plate (2) on the bottom side inside, a pushing structure (3) on the top side inside, an upper pressure plate (4) at the bottom of the pushing structure (3), an electric heating tube (5) inside both the upper pressure plate (4) and the lower pressure plate (2), a cooling mechanism (6) inside both the upper pressure plate (4) and the lower pressure plate (2), and a blower assembly (7) on the rear side inside the hot press (1). The cooling mechanism (6) includes a cold liquid tank (601) bolted to the rear side of the hot press (1). A suction structure (602) is provided on the top of the cold liquid tank (601). An output pipe (603) is connected to the top of the suction structure (602). A coil (604) is provided inside the lower pressure plate (2) and the upper pressure plate (4). The inlet end of the bottom coil (604) is connected to the front side of the output pipe (603). The inlet end and outlet end of the top coil (604) are both connected to an elastic tube (605). The top of the left elastic tube (605) is connected to the bottom of the output pipe (603). The top of the right elastic tube (605) is connected to a return pipe (606). The front side of the return pipe (606) is connected to the outlet end of the bottom coil (604). The bottom of the return pipe (606) is connected to the top of the cold liquid tank (601).

2. The thermally conductive carbon fiber plate hot pressing device according to claim 1, characterized in that: The blowing assembly (7) includes a suction hopper (701) embedded in the rear side of the hot press (1), the suction hopper (701) being located in front of the output pipe (603) and the return pipe (606).

3. The thermally conductive carbon fiber plate hot pressing device according to claim 2, characterized in that: The suction hopper (701) is equipped with a blower (702) inside, which is located on the rear side between the lower pressure plate (2) and the upper pressure plate (4).

4. The thermally conductive carbon fiber plate hot pressing device according to claim 3, characterized in that: A protective net (703) is attached to the front side of the suction hopper (701), and the protective net (703) is located in front of the blower (702).

5. The thermally conductive carbon fiber plate hot pressing device according to claim 1, characterized in that: The suction structure (602) includes a water pump (6021) bolted to the top of the cold liquid tank (601), the absorption end of the water pump (6021) is connected to a suction pipe (6022), and the bottom of the suction pipe (6022) penetrates the top of the cold liquid tank (601) and extends into the interior.

6. The thermally conductive carbon fiber plate hot pressing device according to claim 5, characterized in that: The output end of the water pump (6021) is connected to an output valve (6023), and the output valve (6023) is connected to an output pipe (603).

7. The thermally conductive carbon fiber plate hot pressing device according to claim 1, characterized in that: The pushing structure (3) includes an electric push rod (301) bolted to the top side inside the hot press (1), and a connecting plate (302) is bolted to the bottom of the electric push rod (301). The bottom of the connecting plate (302) is bolted to the top of the upper pressure plate (4).

8. The thermally conductive carbon fiber plate hot pressing device according to claim 7, characterized in that: A controller (8) is bolted to the front of the hot press (1). The controller (8) is electrically connected to the electric heating tube (5), the blower (702), the water pump (6021), the output valve (6023), and the electric push rod (301).

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