Heat insulation plate and hot press
By using a combination of heat insulation layer and flexible pad layer in the hot press, the problem of uneven pressure caused by excessive rigidity of the heat insulation board is solved, which improves the pressing accuracy and yield of PCB board, reduces energy consumption and improves heating efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-04-07
AI Technical Summary
The existing heat insulation board has too high rigidity, which leads to uneven pressure distribution during the hot press process, affecting the yield of PCB boards.
The insulation board structure includes a heat insulation layer and a flexible pad. The flexible pad deforms during the pressing process to eliminate manufacturing defects at the contact surface and pressure unevenness caused by material creep, ensuring uniform pressure distribution.
It improves the lamination accuracy and yield of PCB boards, reduces equipment energy consumption, and enhances heating efficiency and product quality.
Smart Images
Figure CN224089819U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to hot-pressing equipment technical field especially relates to a heat insulation board and hot press. BACKGROUND
[0002] The hot press is the most important core equipment in the PCB (Printed Circuit Board) pressing process, which realizes the cross-linking reaction of resin material under high temperature, high pressure and low vacuum environment, so that the resin material is tightly combined with the copper foil layer. In the production process, the temperature inside the hot press is usually above 260 DEG C. In order to reduce energy conduction and single machine energy consumption, the industry usually sets heat insulation plates on the outer side of the uppermost heat plate and the outer side of the lowermost heat plate of the press.
[0003] In the existing heat insulation plate technology of the hot press, there are many problems to be solved. The traditional heat insulation plate, such as the single material heat insulation plate of asbestos and mineral wool, has high rigidity. There are unavoidable manufacturing defects, such as unevenness or gap, on the contact surface of the hot press, which cannot be effectively compensated, thereby causing uneven pressure distribution in the laminating process, and greatly reducing the yield of PCB products. UTILITY MODEL CONTENTS
[0004] The utility model solves the technical problems that the rigidity of the existing heat insulation plate is too high, and provides a heat insulation plate and a hot press.
[0005] To solve the above problems, on the one hand, the utility model embodiment provides a kind of heat insulation plate, it is applied to hot press, including heat insulation layer and flexible pad layer, the flexible pad layer is stacked in the thickness direction of at least one side surface of the heat insulation layer.
[0006] As a further improvement of the above technical solution:
[0007] Optionally, it includes two flexible pad layers, and the two flexible pad layers are stacked on the two surfaces of the heat insulation layer in the thickness direction.
[0008] Optionally, the flexible pad layer is a silica gel pad layer.
[0009] Optionally, the heat insulation layer is in contact with the hot plate of the hot press through the flexible pad layer.
[0010] Optionally, the flexible pad layer is provided with a reinforcing layer, and the reinforcing layer is used to strengthen the strength of the flexible pad layer.
[0011] Optionally, the reinforcing layer is a mesh fabric layer.
[0012] Optionally, the heat insulation layer is a composite material layer.
[0013] On the other hand, this utility model embodiment provides a hot press, which includes a press housing, hot press plates, a press cylinder, a movable platform, and a heat insulation plate as described above. Multiple layers of the hot press plates are stacked at intervals inside the press housing, and the movable platform is located at the drive end of the press cylinder.
[0014] The heat insulation plate is provided between the active platform and the lowest heat-pressing plate; and / or, the heat insulation plate is provided between the press housing and the uppermost heat-pressing plate.
[0015] As a further improvement to the above technical solution:
[0016] Optionally, the press housing includes an upper support plate, a lower support plate, a first side plate, a second side plate, a front door, a vacuum chamber, and a rear door. The first side plate and the second side plate are opposite each other along a first direction, and the front door and the rear door are opposite each other along a second direction. The upper support plate and the lower support plate are opposite each other along a vertical direction. The upper support plate is fixed to the top of the first side plate and the second side plate, and the lower support plate is fixed to the bottom of the first side plate and the second side plate. The front door is connected to one side of the first side plate and the second side plate along the second direction, and the vacuum chamber is fixed to the other side of the first side plate and the second side plate along the second direction. The rear door is fixed to the side of the vacuum chamber away from the front door, and the cylinder body of the hot press cylinder is mounted on the lower support plate.
[0017] Optionally, the first direction and the second direction are perpendicular to each other.
[0018] This utility model provides a heat insulation board and a hot press, which, compared with the prior art, have at least the following advantages: In use, the heat insulation board is placed between the movable platform and the lowest hot press plate. When the hot press is working, the PCB bonding resin material is placed on the hot press plate. At this time, the press cylinder extends upward under the drive of the hydraulic pump until all the hot press plates are in contact with each other and the press cylinder reaches the system set pressure value. While the press cylinder presses, the hot press plate is heated by the hot oil flowing inside. The press's sealed cavity forms a high vacuum, high temperature, and high pressure environment under the action of the vacuum pump. The PCB resin material undergoes a chemical cross-linking reaction inside the press housing, achieving a tight bond between the resin and the copper foil. The heat insulation layer of this heat insulation board can prevent the heat from the heat insulation board from being conducted and lost to the press housing, thus preventing increased equipment energy consumption. The flexible pad deforms during the pressing process, effectively eliminating manufacturing defects at the hot press contact surface and the problem of uneven pressure transmission caused by the creep of the heat insulation board material, ensuring uniform pressure distribution during lamination, and improving product pressing accuracy and yield. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of the hot press in an unloaded state according to one embodiment of the present invention;
[0021] Figure 2 This is a schematic diagram of the hot press in operation according to one embodiment of the present invention;
[0022] Figure 3 A partial structural diagram of a hot press provided in one embodiment of this utility model;
[0023] Figure 4 for Figure 3 A magnified view of region A in the middle.
[0024] The reference numerals in the accompanying drawings are as follows:
[0025] 100-Insulation board, 110-Insulation layer, 120-Flexible pad, 130-Reinforcing layer, 200-Hot press, 210-Press housing, 211-Upper support plate, 212-Lower support plate, 213-First side plate, 214-Second side plate, 220-Hot press plate, 230-Press cylinder, 240-Moving platform. Detailed Implementation
[0026] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0027] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] like Figures 1 to 4 As shown, one embodiment of this utility model provides a heat insulation plate 100, which is applied to a hot press. Please refer to the following for details. Figure 3 and Figure 4 The heat insulation board 100 includes a heat insulation layer 110 and a flexible pad 120, with the flexible pad 120 stacked on at least one side of the heat insulation layer 110 in the thickness direction.
[0030] In use, the heat insulation plate 100 provided in one embodiment of this utility model is placed between the movable platform 240 and the lowest hot press plate 220. When the hot press 200 is working, the PCB bonding resin material is placed on the hot press plate 220. At this time, the press cylinder 230 extends upward under the drive of the hydraulic pump until all the hot press plates 220 are in contact with each other and the press cylinder 230 reaches the system set pressure value. While the press cylinder 230 is pressurizing, the hot press plate 220 is heated by the hot oil flowing inside it. The press sealing cavity forms a high vacuum, high temperature and high pressure environment under the action of the vacuum pump. The PCB resin material undergoes a chemical cross-linking reaction inside the press housing 210 to achieve a tight bond between the resin and the copper foil.
[0031] The heat insulation layer 110 of the heat insulation plate 100 provided in one embodiment of the present invention can block the heat of the heat insulation plate from being conducted and lost to the press housing 210, thereby increasing the energy consumption of the equipment. The flexible pad 120 deforms during the pressing process, effectively eliminating the manufacturing defects of the contact surface of the hot press 200 and the problem of uneven pressure transmission caused by the creep of the heat insulation plate material, ensuring that the pressure can be evenly distributed during the lamination process, and improving the product pressing accuracy and yield.
[0032] The heat insulation plate 100 provided in one embodiment of this utility model is described in detail below. Figure 3 and Figure 4The heat insulation board 100 includes two flexible pads 120, which are stacked one-to-one on the two surfaces of the heat insulation layer 110 along the thickness direction. The two flexible pads 120 are stacked one-to-one on the upper and lower surfaces of the heat insulation layer 110. Both flexible pads 120 can deform during the pressing process, effectively eliminating manufacturing defects at the contact surface of the hot press 200 and the uneven pressure transmission caused by the creep of the heat insulation board material. This ensures that the pressure is evenly distributed during lamination, further improving the product pressing accuracy and yield.
[0033] In this embodiment, the flexible pad 120 is a silicone pad. Regarding temperature distribution, the uniform thermal conductivity of silicone allows the surface temperature difference of the hot press plate 220 to be controlled within ≤±2℃ (compared to ±5℃ in traditional structures), increasing heating efficiency by 25% and effectively ensuring pressing quality. The silicone pad can effectively fill gaps up to 0.5mm, reducing pressure fluctuations in the hot press 200 and improving product yield. The gradient insulation structure (silicone pad + insulation layer 110 + silicone pad) effectively reduces heat loss, achieving energy savings of 20% to 30%, resulting in good economic and environmental benefits. Durability is also greatly enhanced; in high-temperature (250℃) environments, the compressive strength and component lifespan are significantly improved compared to traditional materials.
[0034] Of course, it is understandable that the flexible pad 120 can also be made of other materials, such as rubber or other flexible materials, as long as it can deform during the pressing process, effectively eliminate the manufacturing defects of the contact surface of the hot press 200 and the problem of uneven pressure transmission caused by the creep of the insulation board material, and ensure that the pressure can be evenly distributed during the lamination process.
[0035] The heat insulation layer 110 contacts the hot press plate 220 of the hot press 200 through the flexible pad 120. When the heat insulation plate 100 provided in one embodiment of the present invention includes a flexible pad 120: the flexible pad 120 is stacked on the upper surface of the heat insulation layer 110, the heat insulation plate 100 is located between the movable platform 240 and the bottommost hot press plate 220, and the flexible pad 120 is in contact with the bottommost hot press plate 220. The advantage of the uniform thermal conductivity of silicone can control the surface temperature difference of the hot plate within ≤±2℃ (±5℃ in the traditional structure), improving the heating efficiency by 25% and effectively ensuring the hot pressing quality; the flexible pad 120 is stacked on the lower surface of the heat insulation layer 110, the heat insulation plate 100 is located between the press housing 210 and the topmost hot press plate 220, and the flexible pad 120 is in contact with the topmost hot press plate 220. The advantage of the uniform thermal conductivity of silicone can control the surface temperature difference of the hot plate within ≤±2℃ (±5℃ in the traditional structure), improving the heating efficiency by 25% and effectively ensuring the hot pressing quality.
[0036] The heat insulation plate 100 provided in one embodiment of this utility model, further details can be found in the attached document. Figure 3and Figure 4 A reinforcing layer 130 is provided within the flexible pad layer 120 to enhance its strength. In this embodiment, the reinforcing layer 130 is a mesh fabric layer. The mesh fabric layer can increase the strength and durability of the silicone pad layer. The heat insulation layer 110 is a layer of glass fiber and mica composite silicate material. The glass fiber and mica composite silicate material can enhance the heat insulation effect and strength of the heat insulation layer 110.
[0037] Of course, it is understandable that the reinforcing layer 130 can also be made of other materials, such as linear reinforcing layer 130. The only requirement is to increase the strength and durability of the silicone pad layer.
[0038] In addition, such as Figures 1 to 4 As shown, another embodiment of this utility model provides a hot press 200, which includes a press housing 210, hot press plates 220, a press cylinder 230, a movable platform 240, and a heat insulation plate 100 as provided in any of the above embodiments. Multiple layers of hot press plates 220 are stacked at intervals within the press housing 210. The movable platform 240 is located at the drive end of the press cylinder 230. A heat insulation plate 100 is provided between the movable platform 240 and the lowest hot press plate 220 to prevent the lowest hot press plate 220 from transferring heat to the press housing 210. The specific structure of the heat insulation plate 100 is as described in the above embodiments. Since this hot press 200 adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.
[0039] The hot press 200 provided in one embodiment of this utility model, further details can be found in the attached document. Figure 2 A heat insulation plate 100 is provided between the press housing 210 and the uppermost hot plate 220 to prevent the uppermost hot plate 220 from transferring heat to the press housing 210.
[0040] The hot press 200 provided in one embodiment of this utility model is described in detail below. Figure 1 and Figure 2The press housing 210 includes an upper support plate 211, a lower support plate 212, a first side plate 213, a second side plate 214, a front door, a vacuum chamber, and a rear door. The first side plate 213 and the second side plate 214 are opposite each other along a first direction, and the front door and the rear door are opposite each other along a second direction. The upper support plate 211 and the lower support plate 212 are opposite each other along a vertical direction. The upper support plate 211 is fixed to the top of the first side plate 213 and the second side plate 214, and the lower support plate 212 is fixed to the bottom of the first side plate 213 and the second side plate 214. The front door is connected to one side of the first side plate 213 and the second side plate 214 along the second direction. The vacuum chamber is fixed to the other side of the first side plate 213 and the second side plate 214 along the second direction. The rear door is fixed to the side of the vacuum chamber away from the front door. The cylinder body of the hot press 200 cylinder 230 is mounted on the lower support plate 212. The first direction is the left-right direction, and the second direction is the front-back direction.
[0041] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.
Claims
1. A heat insulation board, used in a hot press, characterized in that, It includes a heat insulation layer and a flexible pad layer, wherein the flexible pad layer is stacked on at least one side of the heat insulation layer in the thickness direction.
2. The heat insulation board according to claim 1, characterized in that, The heat insulation layer is in contact with the hot press plate of the hot press through the flexible pad layer.
3. The heat insulation board according to claim 1, characterized in that, The flexible pad is a silicone pad.
4. The heat insulation board according to claim 1, characterized in that, It includes two flexible pad layers, which are stacked one-to-one on the two surfaces of the insulation layer along the thickness direction.
5. The heat insulation board according to claim 1, characterized in that, The flexible pad has a reinforcing layer inside, which is used to enhance the strength of the flexible pad.
6. The heat insulation board according to claim 5, characterized in that, The reinforcing layer is a mesh fabric layer.
7. The heat insulation board according to claim 1, characterized in that, The insulation layer is a composite material layer.
8. A hot press, characterized in that, The hot press includes a press housing, hot press plates, a press cylinder, a movable platform, and a heat insulation plate as described in any one of claims 1 to 7. Multiple layers of the hot press plates are stacked at intervals inside the press housing, and the movable platform is located at the drive end of the press cylinder. The heat insulation plate is provided between the active platform and the lowest heat-pressing plate; and / or, the heat insulation plate is provided between the press housing and the uppermost heat-pressing plate.
9. The hot press according to claim 8, characterized in that, The press housing includes an upper support plate, a lower support plate, a first side plate, a second side plate, a front door, a vacuum chamber, and a rear door. The first side plate and the second side plate are opposite each other along a first direction, and the front door and the rear door are opposite each other along a second direction. The upper support plate and the lower support plate are opposite each other along a vertical direction. The upper support plate is fixed to the top of the first side plate and the second side plate, and the lower support plate is fixed to the bottom of the first side plate and the second side plate. The front door is connected to one side of the first side plate and the second side plate along the second direction. The vacuum chamber is fixed to the other side of the first side plate and the second side plate along the second direction. The rear door is fixed to the side of the vacuum chamber away from the front door. The cylinder body of the hot press cylinder is mounted on the lower support plate.
10. The hot press according to claim 9, characterized in that, The first direction and the second direction are perpendicular to each other.