Aluminum-based copper-clad plate and production process thereof
By setting energy-absorbing components, bonding components, and cooling components at the circular holes of the aluminum-based copper clad laminate, the cracking problem caused by the difference in thermal expansion coefficients was solved, and the stability and heat dissipation performance of the aluminum-based copper clad laminate were improved.
Patent Information
- Application Number
- CN202511497233.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-01-23
AI Technical Summary
The problem of cracking at the circular holes of aluminum-based copper clad laminates due to the difference in thermal expansion coefficients of different materials.
The design incorporates a combination of energy-absorbing components, bonding components, fastening components, and cooling components. The energy-absorbing components absorb thermal expansion forces through a thermally conductive silicone sleeve, the bonding components ensure a secure fit of the sleeve, the fastening components remove burrs and secure the device, and the cooling components dissipate heat through thermally conductive materials and ventilation holes.
It effectively alleviates the problem of thermal expansion and cracking at the round holes, and improves the stability and heat dissipation performance of aluminum-based copper clad laminates.
Smart Images
Figure CN121375233A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of aluminum substrate, and particularly relates to an aluminum-based copper-clad plate and a production process thereof. BACKGROUND
[0002] The aluminum-based copper-clad plate is a unique metal-based composite plate, which is generally composed of three layers. The bottom layer is an aluminum substrate, which mainly provides support and heat dissipation for the plate. The layer above the substrate is an insulating layer, which prevents short circuit of the circuit. The top layer is a copper foil, which is processed by etching to form a printed circuit and is used to carry electronic components. Since the aluminum substrate is used, the aluminum-based copper-clad plate has good heat dissipation and is widely used.
[0003] In the prior art, when producing the aluminum-based copper-clad plate, a circular hole is needed to be opened at the edge of the aluminum-based copper-clad plate to facilitate its installation and fixation. Since the cross sections of the three layers of the aluminum-based copper-clad plate in the circular hole are exposed, when heated and expanded, the expansion rates of the three layers in the plane direction and the thickness direction are different, which will cause complex shearing and tensile stress on the inner wall cross section of the hole, thus easily causing cracking of the hole wall position, causing safety hazards to the subsequent use of the aluminum-based copper-clad plate. Therefore, the present application proposes an aluminum-based copper-clad plate and a production process thereof. SUMMARY
[0004] The purpose of the present application is to solve the problem of cracking of the aluminum-based copper-clad plate in the circular hole due to different material thermal expansion in the background art. The present application proposes an aluminum-based copper-clad plate and a production process thereof.
[0005] In the first aspect, the present application proposes an aluminum-based copper-clad plate, which comprises a substrate layer made of aluminum, an insulating layer fixed to the top end of the substrate layer, the insulating layer being made of epoxy resin, a circuit layer fixed to the top end of the insulating layer, a circular hole provided at the top end of the substrate layer, the circular hole penetrating the insulating layer and the circuit layer, and an energy-absorbing assembly, a fitting assembly, a fastening assembly and a cooling assembly. The energy-absorbing assembly is used to reduce the damage caused by the thermal expansion of the substrate layer, the insulating layer and the circuit layer in the circular hole. The energy-absorbing assembly comprises a sleeve inserted into the inner wall of the circular hole. The fitting assembly is used to tightly fit the sleeve to the top end of the circuit layer. The fastening assembly is used to fix the bottom position of the sleeve and remove the excess burrs in the circular hole during the installation of the sleeve. The cooling assembly is used to cool the insulating layer with good thermal conductivity.
[0006] Optionally, the energy absorption assembly further comprises a first contact sleeve, the first contact sleeve is fixedly connected to the top end of the sleeve, the first contact sleeve is attached to the base material layer, the outer wall of the sleeve is fixedly connected with a second contact sleeve, the second contact sleeve is attached to the insulating layer, the outer wall of the sleeve is fixedly connected with a third contact sleeve, the third contact sleeve is attached to the circuit layer, the material of the first contact sleeve, the second contact sleeve and the third contact sleeve is heat-conducting silica gel, the top and bottom of the first contact sleeve, the second contact sleeve and the third contact sleeve are provided with arc-shaped grooves, and gaps are arranged between the first contact sleeve, the second contact sleeve and the third contact sleeve.
[0007] Optionally, the assembly comprises a first pressing plate, the first pressing plate is arranged at the top end of the circuit layer, the top end of the first pressing plate is fixedly connected with a first spring, the bottom of one side of the sleeve is provided with a mounting groove, the top end of the first spring is fixedly connected to the inner wall of the mounting groove, the bottom of the first pressing plate is fixedly connected with a fitting layer, and the fitting layer is arranged at the top end of the circuit layer.
[0008] Optionally, the bottom of one side of the sleeve is provided with a vertical groove, the inner wall of the vertical groove is slidably connected with a first closing plate, and the bottom of the first closing plate is fixedly connected to the top end of the first pressing plate.
[0009] Optionally, the fastening assembly comprises a scraper, the scraper is fixedly connected to the bottom of the sleeve, the shape of the scraper is annular, the bottom of the scraper is inclined to one side, and the diameter of the outer wall of the scraper is consistent with the diameter of the first contact sleeve.
[0010] Optionally, the fastening assembly further comprises a bottom plate, the bottom plate is sleeved on the bottom of the sleeve, the outer wall of the scraper is provided with four groups of clamping grooves, the center of the bottom plate is fixedly connected with four groups of clamping blocks, the clamping blocks are inserted into the inner wall of the clamping grooves, the top end of the bottom plate is fixedly connected with a second spring, the top end of the second spring is fixedly connected with a second pressing plate, the second pressing plate is attached to the bottom of the base material layer, the bottom of the second pressing plate is fixedly connected with a second closing plate, the top end of the bottom plate is provided with a plug groove, the second closing plate is inserted into the plug groove, and the fastening assembly further comprises a locking structure.
[0011] Optionally, the locking structure comprises a circular ring, the circular ring is rotatably connected to the inner wall of the scraper, one side of the circular ring is fixedly connected with a closing plate, the outer wall of the closing plate is provided with four groups of square grooves, one side of the closing plate is fixedly connected with a pull rod, the bottom of the scraper is provided with a sliding groove, the pull rod is slidably arranged in the sliding groove, the inner wall of the scraper is fixedly connected with a fixing plate, one side of the fixing plate is fixedly connected with a third spring, one side of the circular ring and the closing plate is provided with a notch, and one end of the third spring is fixedly connected to the side of the closing plate provided with the notch.
[0012] Optionally, the outer wall of the scraper is provided with a plurality of annular grooves, and the annular grooves are distributed in parallel on the outer wall of the scraper.
[0013] Optionally, the cooling assembly comprises a side plate fixed to one side of the base material layer, the insulating layer and the circuit layer, one side of the side plate is fixed with a heat-conducting sheet, the heat-conducting sheet and the side plate are both heat-conducting materials, and a plurality of groups of ventilation holes are formed in one side of the side plate.
[0014] In a second aspect, a production process of an aluminum-based copper-clad plate is applied to the aluminum-based copper-clad plate in the first aspect, and the process comprises the following steps: S1, the surface of the aluminum base material is pretreated, and the cleaned aluminum base material is etched to form a micro concave-convex structure on the surface of the aluminum base plate; S2, a uniform aluminum oxide layer is formed on the surface of the aluminum base plate by an anodic oxidation process, then an insulating glue solution is prepared, and the insulating glue solution is uniformly mixed by a dispersing machine; S3, the mixed insulating glue solution is coated on the PET film, and the glue solution is solidified, then the treated aluminum base plate, PET film and copper foil are stacked in order, and then placed in a hot press to completely solidify under high temperature and high pressure to become an integrated aluminum-based copper-clad plate; S4, the aluminum-based copper-clad plate after pressing is flattened by a flattening device to keep the aluminum-based copper-clad plate flat, and then the aluminum-based copper-clad plate is cut to a specified size by a plate shearing machine; S5, the cut aluminum-based copper-clad plate is drilled according to the processing requirements, so that a plurality of round holes are drilled on the surface of the aluminum-based copper-clad plate, then a sleeve is inserted into the round hole, the bottom position of the sleeve is fixed by a fastening assembly, and the top end of the sleeve is attached to the upper side of the circuit layer by an attaching assembly.
[0015] Compared with the prior art, the present application has at least one of the following beneficial technical effects: The energy-absorbing assembly can absorb the extrusion force generated by the expansion of the base material layer, the insulating layer and the circuit layer at the position of the round hole, can relieve the pressure caused by the mutual extrusion of the base material layer, the insulating layer and the circuit layer due to thermal expansion, and can absorb part of the heat. The cooling assembly can dissipate heat from the side surface of the base material layer, the insulating layer and the circuit layer, and solve the problem that the round hole of the aluminum-based copper-clad plate is prone to cracking due to thermal expansion of different materials; Further, the sleeve is tightly attached to the circuit layer by the attaching assembly, and the burrs remaining in the sleeve can be removed during installation of the sleeve by the fastening assembly, and the position of the bottom of the sleeve can be stably installed by the fastening assembly. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of an aluminum-based copper-clad plate and a production process thereof. Figure 2 It is a schematic diagram of the overall profile structure of an aluminum-based copper-clad plate and its production process; Figure 3 It is Figure 2 A schematic diagram of the structure of the enlarged portion of Figure 4 It is Figure 2 A schematic diagram of the structure of the enlarged portion of Figure 5 It is Figure 3 A schematic diagram of the structure of the enlarged portion of Figure 6 It is Figure 3 A schematic diagram of the structure of the enlarged portion of Figure 7 It is a schematic diagram of the split structure of the base plate and sleeve of an aluminum-based copper-clad plate and its production process; Figure 8 It is Figure 7 A schematic diagram of the structure of the enlarged portion of Figure 9 It is a schematic diagram of the profile structure of the scraper bottom of an aluminum-based copper-clad plate and its production process; Figure 10 It is Figure 9 A schematic diagram of the structure of the enlarged portion of Figure 11 It is a schematic diagram of the closed plate and third spring structure of an aluminum-based copper-clad plate and its production process; Figure 12 It is a schematic diagram of the closed plate moving into the square groove of an aluminum-based copper-clad plate and its production process.
[0017] Reference signs: 1, base material layer; 2, insulation layer; 3, circuit layer; 4, sleeve; 5, first contact sleeve; 6, second contact sleeve; 7, third contact sleeve; 8, mounting groove; 9, first spring; 10, first pressing plate; 11, bonding layer; 12, vertical groove; 13, first closing plate; 14, scraper; 15, annular groove; 16, base plate; 17, clamping block; 18, second spring; 19, second pressing plate; 20, second closing plate; 21, circular ring; 22, closing plate; 23, square groove; 24, pull rod; 25, third spring; 26, fixed plate; 27, sliding groove; 28, side plate; 29, heat-conducting sheet; 30, ventilation hole. DETAILED DESCRIPTION
[0018] The technical solutions of the present application are further described below in combination with the drawings and specific embodiments.
[0019] As Figure 1 - Figure 3As shown, the present application provides an aluminum-based copper-clad plate, which comprises a substrate layer 1, the substrate layer 1 is made of aluminum material, the aluminum material of the substrate layer 1 is beneficial to heat dissipation, the top end of the substrate layer 1 is fixedly connected with an insulating layer 2, the material of the insulating layer 2 is epoxy resin, the epoxy resin material can be beneficial to conduct heat, the top end of the insulating layer 2 is fixedly connected with a circuit layer 3, the top end of the substrate layer 1 is provided with a round hole, the round hole is used for installing the circuit board, the round hole penetrates the insulating layer 2 and the circuit layer 3, and further comprises an energy absorption assembly, a bonding assembly, a fastening assembly and a cooling assembly.
[0020] In this embodiment, as shown in the figure, Figure 3 The energy absorption assembly of the aluminum-based copper-clad plate is used to reduce the damage of the substrate layer 1, the insulating layer 2 and the circuit layer 3 in the round hole due to thermal expansion, the energy absorption assembly comprises a sleeve 4, the sleeve 4 is inserted into the inner wall of the round hole, the energy absorption assembly further comprises a first contact sleeve 5, the first contact sleeve 5 is fixedly connected to the top end of the sleeve 4, the first contact sleeve 5 is attached to the substrate layer 1, the outer wall of the sleeve 4 is fixedly connected with a second contact sleeve 6, the second contact sleeve 6 is attached to the insulating layer 2, the outer wall of the sleeve 4 is fixedly connected with a third contact sleeve 7, the third contact sleeve 7 is attached to the circuit layer 3, the materials of the first contact sleeve 5, the second contact sleeve 6 and the third contact sleeve 7 are all heat-conducting silica gel, when the substrate layer 1, the insulating layer 2 and the circuit layer 3 are heated and expanded, part of the substrate layer 1, the insulating layer 2 and the circuit layer 3 will be squeezed into the first contact sleeve 5, the second contact sleeve 6 and the third contact sleeve 7 respectively, because the first contact sleeve 5, the second contact sleeve 6 and the third contact sleeve 7 are all made of heat-conducting silica gel, therefore, the silica gel can absorb the squeezing force generated by the thermal expansion of the substrate layer 1, the insulating layer 2 and the circuit layer 3 due to its softness, the top and bottom of the first contact sleeve 5, the second contact sleeve 6 and the third contact sleeve 7 are all provided with arc-shaped grooves, and gaps are arranged between the first contact sleeve 5, the second contact sleeve 6 and the third contact sleeve 7, so that the top and bottom of the first contact sleeve 5, the second contact sleeve 6 and the third contact sleeve 7 are provided with arc-shaped grooves, which can provide a deformation space for the three when they are squeezed, and the heat-conducting silica gel can also guide the heat on the substrate layer 1, the insulating layer 2 and the circuit layer 3 to the sleeve 4, so that the sleeve 4 can absorb the heat generated by the substrate layer 1, the insulating layer 2 and the circuit layer 3, and can dissipate heat through the exposed part of the sleeve 4.
[0021] In this process, as shown in the figure, Figure 5As shown, the aluminum-based copper-clad plate fitting assembly is used to tightly fit the sleeve 4 on the top of the circuit layer 3, the fitting assembly comprises a first pressing plate 10, the first pressing plate 10 is arranged on the top of the circuit layer 3, after the sleeve 4 is inserted into the round hole, the fitting layer 11 at the bottom of the first pressing plate 10 contacts the circuit layer 3, the top of the first pressing plate 10 is fixedly connected with a first spring 9, the bottom of one side of the sleeve 4 is provided with a mounting groove 8, the top of the first spring 9 is fixedly connected with the inner wall of the mounting groove 8, because the first spring 9 is arranged between the first pressing plate 10 and the sleeve 4, when the circuit layer 3 and the insulation layer 2 are heated and expand upward, the first pressing plate 10 and the fitting layer 11 are pushed to move upward, and the first spring 9 is extruded, the reset force of the first spring 9 can provide downward thrust for the first pressing plate 10, so that the first pressing plate 10 always fits on the circuit layer, which can promote the reset of the insulation layer 2 and the circuit layer 3 which are heated and expanded, and facilitate the stable installation of the sleeve 4 in the round hole, the bottom of the first pressing plate 10 is fixedly connected with the fitting layer 11, the fitting layer 11 is arranged on the top of the circuit layer 3, the fitting layer 11 can prevent the first pressing plate 10 from causing damage to the circuit layer 3 when downward pressure is generated, the bottom of one side of the sleeve 4 is provided with a vertical groove 12, the inner wall of the vertical groove 12 is slidably connected with a first closing plate 13, the bottom of the first closing plate 13 is fixedly connected with the top of the first pressing plate 10, by arranging the vertical groove 12 at the bottom of the sleeve 4, when the first pressing plate 10 moves upward, the first closing plate 13 moves in the vertical groove 12, so that the annular first closing plate 13 is always located between the first pressing plate 10 and the sleeve 4, thereby facilitating the sealing of the first sleeve 4 and the inner wall of the round hole, preventing impurities from entering between the first sleeve 4 and the inner wall of the round hole.
[0022] Further, as Figure 6 、 Figure 7 and Figure 8As shown, the fastening assembly of the aluminum-based copper-clad plate is used to fix the bottom position of the sleeve 4 and remove the excess burrs in the round hole during the installation of the sleeve 4, the fastening assembly comprises a scraper 14 which is fixed at the bottom of the sleeve 4, the scraper 14 is annular in shape, when the sleeve 4 is inserted into the round hole, the scraper 14 at the bottom of the sleeve 4 enters the round hole first, the bottom of the scraper 14 is inclined to one side, because the bottom of the scraper 14 is inclined to one side, when the scraper 14 moves from top to bottom in the round hole, the larger burrs remaining in the round hole are scraped off and fall down along the gravity, which is beneficial to keep the round hole clean, the diameter of the outer wall of the scraper 14 is consistent with the diameter of the first contact sleeve 5, the outer wall of the scraper 14 is provided with annular grooves 15, the annular grooves 15 are provided in multiple groups and are distributed in parallel on the outer wall of the scraper 14, by providing multiple groups of annular grooves 15 on the outer wall of the scraper 14, when the scraper 14 passes through the round hole, the base material layer 1, the insulating layer 2 and the circuit layer 3 of the inner wall of the round hole are polished by the multiple groups of annular grooves 15 cooperating with the scraper 14, so as to remove the small burrs of the inner wall of the round hole.
[0023] Still further, as Figure 7 - Figure 12As shown, the fastening assembly further comprises a bottom plate 16 sleeved at the bottom of the sleeve 4, the outer wall of the scraper 14 is provided with four sets of clamping grooves, the center of the bottom plate 16 is fixedly connected with four sets of clamping blocks 17, the clamping blocks 17 are inserted into the inner wall of the clamping grooves, the top end of the bottom plate 16 is fixedly connected with a second spring 18, the top end of the second spring 18 is fixedly connected with a second pressing plate 19, the second pressing plate 19 is attached to the bottom of the substrate layer 1, the bottom of the second pressing plate 19 is fixedly connected with a second closing plate 20, the top end of the bottom plate 16 is provided with a slot, the second closing plate 20 is inserted into the slot, the fastening assembly further comprises a locking structure, the locking structure comprises a circular ring 21 rotatably connected to the inner wall of the scraper 14, one side of the circular ring 21 is fixedly connected with a closing plate 22, the outer wall of the closing plate 22 is provided with four sets of square grooves 23, one side of the closing plate 22 is fixedly connected with a pull rod 24, the bottom of the scraper 14 is provided with a sliding groove 27, the pull rod 24 is slidingly arranged in the sliding groove 27, the inner wall of the scraper 14 is fixedly connected with a fixed plate 26, one side of the fixed plate 26 is fixedly connected with a third spring 25, one side of the circular ring 21 and the closing plate 22 is provided with a notch, one end of the third spring 25 is fixedly connected to the side of the closing plate 22 provided with the notch, when it is needed to pass the clamping blocks 17 in the bottom plate 16 through the clamping grooves, the pull rod 24 can be pulled to move the pull rod 24 to one side in the sliding groove 27, and the pull rod 24 will drive the fixed plate 26 and the circular ring 21 to rotate together in the interior of the scraper 14 when moving, and the closing plate will press the third spring 25 on one side when rotating, until the four sets of square grooves 23 of the closing plate 22 coincide with the four sets of clamping grooves of the scraper 14, then the bottom plate 16 is placed at the bottom of the sleeve 4, and the four sets of clamping blocks 17 are aligned with the four sets of clamping grooves, then the bottom plate 16 is pushed upwards to make the four sets of clamping blocks 17 pass through the four sets of clamping grooves and move to above the clamping grooves, the bottom plate 16 can be rotated to make the four sets of clamping blocks 17 rotate to the top end of the scraper 14, until the positions of the four sets of clamping blocks 17 move to the top end of the scraper 14, so as to install the bottom plate 16 at the bottom of the sleeve 4, and the second pressing plate 19 on the bottom plate 16 is attached to the bottom of the substrate layer 1, the position of the bottom of the sleeve 4 can be fixed by the second spring 18 and the second pressing plate 19, and impurities can be prevented from entering between the second pressing plate 19 and the bottom plate 16 by the cooperation of the second closing plate 20 and the slot, after the installation of the bottom plate 16 is completed, the pull rod 24 can be loosened, the third spring 25 pushes the closing plate 22 to reset, so that the closing plate 22 returns to the four sets of square grooves 23, and the installation of the bottom plate 16 is stable by the reset of the closing plate 22.
[0024] As an embodiment, as Figure 4As shown, the cooling assembly of the aluminum-based copper-clad plate is used for cooling treatment of the insulating layer 2 with good thermal conductivity, the cooling assembly comprises a side plate 28 fixed on one side of the substrate layer 1, the insulating layer 2 and the circuit layer 3, one side of the side plate 28 is fixed with a heat-conducting sheet 29, the heat-conducting sheet 29 and the side plate 28 are both heat-conducting materials, when the substrate layer 1, the insulating layer 2 and the circuit layer 3 are heated, the heat generated by the substrate layer 1, the insulating layer 2 and the circuit layer 3 can be dissipated to the outside through the heat-conducting side plate 28 and the heat-conducting sheet 29, a plurality of ventilation holes 30 are formed on one side of the insulating layer 2, when the airflow passes through the side plate 28, the heat on one side of the insulating layer 2 can be carried out through the ventilation holes 30, which is beneficial to improve the heat conduction effect of the insulating layer 2.
[0025] An aluminum-based copper-clad plate production process, the aluminum-based copper-clad plate is applied, and the process comprises the following steps: S1, the surface of the aluminum substrate is pretreated, and the cleaned aluminum substrate is etched to form a micro concave-convex structure on the surface of the aluminum substrate; S2, a uniform aluminum oxide layer is formed on the surface of the aluminum substrate by an anodic oxidation process, then an insulating glue solution is prepared, and the insulating glue solution is uniformly mixed by a dispersing machine; S3, the mixed insulating glue solution is coated on the PET film, and the glue solution is solidified, then the treated aluminum substrate, PET film and copper foil are stacked in order, then the stacked aluminum substrate, PET film and copper foil are put into a hot press, and they are completely solidified under high temperature and high pressure to become an integrated aluminum-based copper-clad plate; S4, the aluminum-based copper-clad plate after pressing is flattened by a flattening device to keep the aluminum-based copper-clad plate flat, then the aluminum-based copper-clad plate is cut into a specified size by a plate shearing machine; S5, the cut aluminum-based copper-clad plate is drilled according to the processing requirements, so that the surface of the aluminum-based copper-clad plate is drilled with a plurality of round holes, then the sleeve 4 is inserted into the round hole, the bottom position of the sleeve 4 is fixed by the fastening assembly, and the top end of the sleeve 4 is attached to the upper side of the circuit layer 3 by the attaching assembly.
[0026] Working principle: in order to solve the problem that the aluminum base copper clad plate round hole is easy to be cracked by different material thermal expansion, the base layer 1 of aluminum material can provide stable support for the plate, so that the plate is firm and stable, and the aluminum material can also improve the heat dissipation effect of the base layer 1. Install the sleeve 4 in the round hole. When the sleeve 4 is inserted into the round hole, the scraper 14 at the bottom of the sleeve 4 will enter the round hole first. Because the bottom of the scraper 14 is inclined to one side, when the scraper 14 moves from top to bottom in the round hole, it will scrape off the large burrs remaining in the round hole and fall down along the gravity. Through the cooperation of multiple groups of annular grooves 15 and scrapers 14, the base layer 1, insulation layer 2 and circuit layer 3 on the inner wall of the round hole are polished, so as to remove the small burrs on the inner wall of the round hole, which is beneficial to keep the round hole clean. After the sleeve 4 is inserted into the round hole, the first pressing plate 10 will contact the circuit layer 3 on the bottom of the first pressing plate 10. Through the matching layer 11, the first pressing plate 10 can prevent the circuit layer 3 from being damaged when the first pressing plate 10 produces downward pressure. Because the first spring 9 is arranged between the first pressing plate 10 and the sleeve 4, when the circuit layer 3 and the insulation layer 2 are heated and expand upward, the first pressing plate 10 and the matching layer 11 will move upward and press the first spring 9. The reset force of the first spring 9 can provide downward thrust for the first pressing plate 10, so that the first pressing plate 10 always adheres to the circuit layer, so as to facilitate the reset of the insulation layer 2 and the circuit layer 3 which are expanded by heat, and facilitate the stable installation of the sleeve 4 in the round hole. By arranging the vertical groove 12 at the bottom of the sleeve 4, when the first pressing plate 10 moves upward, the first closing plate 13 will move in the vertical groove 12, so that the annular first closing plate 13 is always located between the first pressing plate 10 and the sleeve 4, thereby facilitating the sealing of the first sleeve 4 and the inner wall of the round hole, preventing impurities from entering between the first sleeve 4 and the inner wall of the round hole; By pulling the pull rod 24, the pull rod 24 moves in the sliding groove 27 to one side, and the pull rod 24 moves with the fixed plate 26 and the circular ring 21 rotating in the inside of the scraper 14, and the closing plate rotates to press the third spring 25 on one side until the four groups of square grooves 23 of the closing plate 22 coincide with the four groups of clamping grooves of the scraper 14, the bottom plate 16 is placed at the bottom of the sleeve 4, and the four groups of clamping blocks 17 are aligned with the four groups of clamping grooves, then the bottom plate 16 is pushed up to make the four groups of clamping blocks 17 pass through the four groups of clamping grooves and move above the clamping grooves, the bottom plate 16 can be rotated to make the four groups of clamping blocks 17 rotate to the top end of the scraper 14 until the position of the four groups of clamping blocks 17 moves to the top end of the scraper 14, so that the bottom plate 16 is installed at the bottom of the sleeve 4, and the second pressing plate 19 on the bottom plate 16 is attached to the bottom of the base material layer 1, the position of the bottom of the sleeve 4 can be fixed by the second spring 18 and the second pressing plate 19, and impurities can be prevented from entering between the second pressing plate 19 and the bottom plate 16 by the cooperation of the second closing plate 20 and the insertion groove, after the installation of the bottom plate 16 is completed, the pull rod 24 can be loosened, the third spring 25 pushes the closing plate 22 to reset, so that the closing plate 22 returns to the four groups of square grooves 23 again, and the installation of the bottom plate 16 is stable through the reset of the closing plate 22; When the base material layer 1, the insulation layer 2 and the circuit layer 3 are heated and expanded, part of the base material layer 1, the insulation layer 2 and the circuit layer 3 expanded will be pressed to the first contact sleeve 5, the second contact sleeve 6 and the third contact sleeve 7 respectively, because the first contact sleeve 5, the second contact sleeve 6 and the third contact sleeve 7 are all made of heat-conducting silica gel material, so the silica gel can absorb the pressing force generated by the expansion of the base material layer 1, the insulation layer 2 and the circuit layer 3 due to heating, and the top and bottom of the first contact sleeve 5, the second contact sleeve 6 and the third contact sleeve 7 are provided with arc-shaped grooves, so that they can provide space for deformation when they are pressed, and the heat-conducting silica gel can also guide the heat on the base material layer 1, the insulation layer 2 and the circuit layer 3 to the sleeve 4, so that the sleeve 4 can absorb the heat generated by the base material layer 1, the insulation layer 2 and the circuit layer 3, and can dissipate heat through the exposed part of the sleeve 4, when the base material layer 1, the insulation layer 2 and the circuit layer 3 are heated, the heat generated by the base material layer 1, the insulation layer 2 and the circuit layer 3 can be dissipated to the outside through the heat-conducting side plate 28 and the heat-conducting sheet 29, and when the airflow passes through the side plate 28, the heat on one side of the insulation layer 2 can be carried out through the ventilation hole 30, which is conducive to improving the heat-conducting effect of the insulation layer 2.
[0027] The above specific embodiments are only several optional embodiments of the present application, and based on the technical solutions of the present application and the related inspiration of the above embodiments, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments.
Claims
1. An aluminum-based copper-clad plate, comprising a substrate layer (1), the substrate layer (1) being made of aluminum material, a top end of the substrate layer (1) being fixedly connected with an insulating layer (2), the insulating layer (2) being made of epoxy resin, a top end of the insulating layer (2) being fixedly connected with a circuit layer (3), a circular hole being formed in the top end of the substrate layer (1), the circular hole penetrating through the insulating layer (2) and the circuit layer (3), characterized in that: It also includes an energy absorption component, a fitting component, a fastening component and a cooling component; The energy absorption component is used to reduce the damage of the substrate layer (1), the insulation layer (2) and the circuit layer (3) in the round hole due to thermal expansion, and the energy absorption component includes a sleeve (4), and the sleeve (4) is inserted into the inner wall of the round hole; The fitting component is used to tightly fit the sleeve (4) at the top end of the circuit layer (3); The fastening component is used to fix the position of the bottom of the sleeve (4), and to remove the excess burrs in the round hole during the installation of the sleeve (4); The cooling component is used for cooling treatment of the insulation layer (2) with good thermal conductivity.
2. The aluminum-based copper-clad plate according to claim 1, wherein The energy absorption component further includes a first contact sleeve (5) fixed to the top end of the sleeve (4), the first contact sleeve (5) is in contact with the substrate layer (1), the outer wall of the sleeve (4) is fixedly connected with a second contact sleeve (6), the second contact sleeve (6) is in contact with the insulation layer (2), the outer wall of the sleeve (4) is fixedly connected with a third contact sleeve (7), the third contact sleeve (7) is in contact with the circuit layer (3), the material of the first contact sleeve (5), the second contact sleeve (6) and the third contact sleeve (7) is thermal conductive silica gel, the top and bottom of the first contact sleeve (5), the second contact sleeve (6) and the third contact sleeve (7) are provided with arc-shaped grooves, and the first contact sleeve (5), the second contact sleeve (6) and the third contact sleeve (7) are provided with gaps.
3. The aluminum-based copper-clad plate according to claim 2, wherein The fitting component includes a first pressing plate (10) arranged at the top end of the circuit layer (3), a first spring (9) fixedly connected to the top end of the first pressing plate (10), a mounting groove (8) formed in the bottom of one side of the sleeve (4), the top end of the first spring (9) being fixedly connected to the inner wall of the mounting groove (8), and a fitting layer (11) fixedly connected to the bottom of the first pressing plate (10) and arranged at the top end of the circuit layer (3).
4. The aluminum-based copper-clad plate according to claim 3, wherein A vertical groove (12) is formed in the bottom of one side of the sleeve (4), a first closing plate (13) is slidably connected to the inner wall of the vertical groove (12), and the bottom of the first closing plate (13) is fixedly connected to the top end of the first pressing plate (10).
5. The aluminum-based copper-clad plate according to claim 4, wherein The fastening component includes a scraper (14) fixedly connected to the bottom of the sleeve (4), the scraper (14) is annular in shape, the bottom of the scraper (14) is inclined to one side, and the diameter of the outer wall of the scraper (14) is consistent with the diameter of the first contact sleeve (5).
6. The aluminum-based copper-clad plate according to claim 5, wherein The fastening assembly further comprises a bottom plate (16) sleeved at the bottom of the sleeve (4), four sets of clamping grooves are formed in the outer wall of the scraper (14), four sets of clamping blocks (17) are fixedly connected at the center of the bottom plate (16), the clamping blocks (17) are inserted into the inner wall of the clamping grooves, a second spring (18) is fixedly connected at the top end of the bottom plate (16), a second pressing plate (19) is fixedly connected at the top end of the second spring (18), the second pressing plate (19) is attached to the bottom of the substrate layer (1), a second closing plate (20) is fixedly connected at the bottom of the second pressing plate (19), an insertion slot is formed in the top end of the bottom plate (16), the second closing plate (20) is inserted into the insertion slot, and the fastening assembly further comprises a locking structure.
7. The aluminum-based copper-clad plate according to claim 6, wherein The locking structure comprises a circular ring (21) rotatably connected to the inner wall of the scraper (14), a closing plate (22) fixedly connected to one side of the circular ring (21), four sets of square grooves (23) formed in the outer wall of the closing plate (22), a pull rod (24) fixedly connected to one side of the closing plate (22), a sliding groove (27) formed in the bottom of the scraper (14), the pull rod (24) slidingly arranged in the sliding groove (27), a fixed plate (26) fixedly connected to the inner wall of the scraper (14), a third spring (25) fixedly connected to one side of the fixed plate (26), and notches formed in one side of the circular ring (21) and the closing plate (22), one end of the third spring (25) being fixedly connected to one side of the closing plate (22) where the notches are formed.
8. The aluminum-based copper-clad plate according to claim 7, wherein The outer wall of the scraper (14) is provided with a plurality of annular grooves (15) which are distributed in parallel on the outer wall of the scraper (14).
9. The aluminum-based copper-clad plate according to claim 8, wherein The cooling assembly comprises a side plate (28) fixedly connected to one side of the substrate layer (1), the insulating layer (2) and the circuit layer (3), a heat-conducting sheet (29) fixedly connected to one side of the side plate (28), the heat-conducting sheet (29) and the side plate (28) being made of heat-conductive material, and a plurality of ventilation holes (30) formed in one side of the side plate (28) located at the insulating layer (2).
10. An aluminum-based copper-clad plate production process applied to the aluminum-based copper-clad plate of claim 9, characterized in that, The process comprises the following steps: S1, pretreating the surface of the aluminum substrate, and etching the cleaned aluminum substrate to form a micro concave-convex structure on the surface of the aluminum substrate; S2, forming a uniform aluminum oxide layer on the surface of the aluminum substrate by an anodic oxidation process, then preparing an insulating glue solution, and uniformly mixing the insulating glue solution by a dispersing machine; S3, coating the mixed insulating glue solution on a PET film, and solidifying the glue solution, then stacking the treated aluminum substrate, the PET film and the copper foil in order, and placing them in a hot press to completely solidify them under high temperature and high pressure to become an integrated aluminum-based copper-clad plate; S4, flattening the aluminum-based copper-clad plate after pressing by a flattening device to keep the aluminum-based copper-clad plate in a flat state, and then cutting the aluminum-based copper-clad plate into a specified size by a plate shearing machine; S5, the aluminum-based copper-clad plate with the cutting completed is drilled according to the processing requirement, so that the surface of the aluminum-based copper-clad plate is drilled with multiple groups of round holes, then the sleeve (4) is inserted into the round holes, the bottom position of the sleeve (4) can be fixed through the fastening assembly, and the top end of the sleeve (4) is attached above the circuit layer (3) through the attaching assembly.