CN110572946B - Preparation method of ceramic aluminum-based copper-clad plate - Google Patents
Preparation method of ceramic aluminum-based copper-clad plate Download PDFInfo
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- CN110572946B CN110572946B CN201911009300.5A CN201911009300A CN110572946B CN 110572946 B CN110572946 B CN 110572946B CN 201911009300 A CN201911009300 A CN 201911009300A CN 110572946 B CN110572946 B CN 110572946B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
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- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/022—Processes for manufacturing precursors of printed circuits, i.e. copper-clad substrates
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Abstract
The invention discloses a preparation method of a ceramic aluminum-based copper-clad plate, which comprises the steps of preparing ceramic glaze by effectively proportioning alumina, silica, titanium oxide, boron oxide and alkali metal oxide, wherein the thermal conductivity of the finally prepared ceramic aluminum-based copper-clad plate is 3.75-4.5W/m.k, and the pressure resistance is 18-40 KV/mm. According to the ceramic aluminum plate drying device, the fixed plate is pulled from the opening in one side of the drying cylinder, the fixed plate drives the rod sleeve at the bottom to move along the horizontal rod, the fixed plate is further driven to move out of the inner cavity of the drying cylinder, a ceramic aluminum plate is placed on the upper surface of the fixed plate, the fixed plate is pushed to be pushed into the inner cavity of the drying cylinder, the telescopic cylinder is started, the piston rod of the telescopic cylinder pushes the clamping block to clamp the two sides of the ceramic aluminum plate, and the technical problem that the ceramic aluminum plate is not easy to place, fix and take out in the drying device in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of preparation of aluminum-based copper-clad plates, in particular to a preparation method of a ceramic aluminum-based copper-clad plate.
Background
The ceramic aluminum-based copper-clad plate has the characteristics of high thermal conductivity coefficient, high heat resistance, high electrical insulation, high mechanical strength, thermal expansion coefficient similar to that of a silicon chip, low dielectric loss and the like of ceramic, has high electrical conductivity and excellent welding performance of oxygen-free copper, is a key material for packaging power modules, connecting chips and radiating substrates in the field of power electronics at present, and is widely applied to various electrical equipment and electronic products.
Patent document (201710247342.7) discloses a ceramic-based copper-clad plate and a preparation process thereof, wherein an aluminum alloy layer and a copper layer are sequentially designed on a ceramic substrate of the ceramic-based copper-clad plate prepared by the process, and the obtained metal layer is more firmly and reliably combined with the ceramic substrate by heat treatment after copper plating thickening, and particularly hydrofluoric acid which does not pollute the environment is not used, so that green production is facilitated. But this ceramic base copper-clad plate's heat conductivity and resistance to pressure are all not good, and the ceramic base copper-clad plate among the prior art takes out in drying equipment, fixes, places all inconveniently simultaneously, and drying equipment's a stoving section of thick bamboo can not be automatic closed simultaneously, and the practicality is not strong, and the efficiency of drying is also not ideal.
Disclosure of Invention
The invention aims to provide a preparation method of a ceramic aluminum-based copper-clad plate, which solves the following technical problems: (1) the thermal conductivity of the finally prepared aluminum-based copper-clad plate is 3.75-4.5W/m.k according to ISO22007-2:2008, and the pressure resistance is 18-40KV/mm according to GBT24344-2009, so that the technical problem that the thermal conductivity and the pressure resistance of the aluminum-based copper-clad plate in the prior art are poor is solved; (2) the fixed plate is pulled from the opening on one side of the drying cylinder, the fixed plate drives the rod sleeve at the bottom to move along the horizontal rod, the fixed plate is further driven to move out of the inner cavity of the drying cylinder, the ceramic aluminum plate is placed on the upper surface of the fixed plate, the fixed plate is pushed to be pushed into the inner cavity of the drying cylinder, the telescopic cylinder is started, the piston rod of the telescopic cylinder pushes the clamping block to clamp the two sides of the ceramic aluminum plate, and the technical problem that the ceramic aluminum plate is not easy to place, fix and take out in drying equipment in the prior art is solved; (3) drive the lead screw through the driving motor output shaft and rotate, the connecting piece of lead screw outer peripheral face drives the mounting panel and removes towards removing in the fixed cover, the mounting panel drives the slider of both sides bottom and prolongs the slide rail and removes, and then the drying cylinder orientation that the mounting panel drove the top removes to the end cover direction in the fixed cover, drying cylinder and end cover cooperation block, the recess cooperation block of seting up on lug on the end plate and the upset bottom plate simultaneously, through the upset cylinder, the connecting plate, the upset bottom plate, the cooperation design of end plate, make ceramic aluminum plate can realize the upset in the drying cylinder, make the electric heating wire that distributes can be abundant dry to ceramic aluminum plate surface, solve the not high efficiency of drying equipment stoving among the prior art, the unable automatic closed technical problem of drying cylinder simultaneously.
The purpose of the invention can be realized by the following technical scheme:
a preparation method of a ceramic aluminum-based copper-clad plate comprises the following steps:
the method comprises the following steps: uniformly spraying ceramic glaze on an aluminum plate by using a spray gun, and reinforcing at high temperature to form a ceramic aluminum plate;
step two: coating a surface active agent on the ceramic surface of a ceramic aluminum plate, pulling a fixed plate from an opening on one side of a drying cylinder, driving a rod sleeve at the bottom to move along a horizontal rod by the fixed plate, further driving the fixed plate to move out of an inner cavity of the drying cylinder, placing the ceramic aluminum plate on the upper surface of the fixed plate, pushing the fixed plate into the inner cavity of the drying cylinder, starting a telescopic cylinder, pushing a clamping block by a piston rod of the telescopic cylinder to clamp two sides of the ceramic aluminum plate by a driving motor output shaft, driving a screw rod to rotate by a connecting piece on the outer peripheral surface of the screw rod, driving a mounting plate to move towards a fixed cover by the mounting plate, driving sliding blocks at the bottoms of two sides to move along a sliding rail by the mounting plate, further driving a drying cylinder at the top to move towards the direction of an end cover in the fixed cover by the mounting plate, matching and clamping a lug on the end plate with a groove arranged on an overturning bottom plate, and discharging hot air towards a telescopic air pipe by an electric heating fan, hot air enters an inner cavity of the drying cylinder through the pipe connecting seat, an electric heating wire heats the inner cavity of the drying cylinder, the output end of the overturning cylinder drives the connecting plate to rotate, the connecting plate drives the overturning bottom plate to overturn, the overturning bottom plate drives the end plate to overturn, and further drives the ceramic aluminum plate on the fixed plate to overturn, and a surfactant on the ceramic surface of the ceramic aluminum plate is dried;
step three: coating a high-heat-conduction bonding layer on the ceramic surface of the dried ceramic aluminum plate, superposing the ceramic aluminum plate coated with the high-heat-conduction layer and a copper foil to form a superposed body, carrying out hot pressing on the superposed body in a vacuum hot press, and then carrying out cold pressing to obtain the ceramic aluminum-based copper-clad plate.
Furthermore, in the first step, the curing temperature is 450-570 ℃, and the curing time is 3-10 min.
Further, the ceramic glaze is composed of alumina, silica, titanium oxide, boron oxide and alkali metal oxide, and the mass ratio of the components is (1-5): (25-35): (15-25): (2-10): (20-40), wherein the alkali metal oxide is composed of sodium oxide, potassium oxide and lithium oxide, the mass ratio of the components is 4:3:1, and the enamel spraying thickness is 10-200 μm.
Further, in the second step, the drying temperature is 140-200 ℃, the drying time is 5-30 min, and the surfactant is OP-10, OP-30, OP-40 or KH-560.
Furthermore, the high heat conduction bonding layer is formed by mixing epoxy resin and inorganic nano oxide, the thickness of the high heat conduction bonding layer is 10-30 mu m, and the inorganic nano oxide comprises zinc oxide, titanium oxide, calcium oxide, antimony oxide, aluminum oxide, zirconium oxide, boron oxide or silicon oxide; the particle size of the inorganic nano oxide is 1-150 nm.
Further, the hot pressing temperature of the vacuum hot press in the third step is 140-220 ℃, and the hot pressing time is 20-60 min.
Further, the drying equipment comprises the following working steps: pulling a fixed plate from the opening at one side of the drying cylinder, driving a rod sleeve at the bottom to move along a horizontal rod by the fixed plate, further driving the fixed plate to move out of the inner cavity of the drying cylinder, placing a ceramic aluminum plate on the upper surface of the fixed plate, pushing the fixed plate to push the fixed plate into the inner cavity of the drying cylinder, starting a telescopic cylinder, pushing a clamping block by a telescopic cylinder piston rod to clamp two sides of the ceramic aluminum plate, driving a lead screw to rotate by a driving motor output shaft, driving a mounting plate to move towards a fixed cover by a connecting piece on the outer peripheral surface of the lead screw, driving a sliding block at the bottom of two sides to move along a sliding rail by the mounting plate, further driving a drying cylinder at the top to move towards the direction of an end cover in the fixed cover by the mounting plate, matching and clamping the drying cylinder with the end cover, simultaneously, matching and clamping a lug on an end plate with a groove arranged on a turnover bottom plate, discharging hot air into the inner cavity of the drying cylinder by an electric heating fan towards a telescopic air pipe base, electric heating wire heats a stoving section of thick bamboo inner chamber, and upset cylinder output drives the connecting plate and rotates, and the connecting plate drives the upset of upset bottom plate, and the upset bottom plate drives the end plate upset, and then drives ceramic aluminum plate on the fixed plate and overturn, dries the surfactant of ceramic aluminum plate ceramic face.
The invention has the beneficial effects that:
(1) according to the preparation method of the ceramic aluminum-based copper-clad plate, the aluminum oxide, the silicon dioxide, the titanium oxide, the boron oxide and the alkali metal oxide are effectively proportioned to prepare the ceramic glaze, the finally prepared ceramic aluminum-based copper-clad plate has good thermal conductivity and pressure resistance, the epoxy resin is added, the chemical activity of an epoxy group is matched with the inorganic nano oxide to greatly improve the chemical stability of the ceramic aluminum-based copper-clad plate, the copper foil and the ceramic layer have good thermal conductivity, the bonding layer and the ceramic layer have good insulation effects, and the pressure resistance is also improved, according to ISO22007-2:2008, the thermal conductivity of the finally prepared ceramic aluminum-based copper-clad plate is 3.75-4.5W/m.k, according to GBT24344-2009, the pressure resistance is 18-40 KV/mm.
(2) The fixed plate is pulled from the opening in one side of the drying cylinder, the fixed plate drives the rod sleeve at the bottom to move along the horizontal rod, the fixed plate is further driven to move out of the inner cavity of the drying cylinder, the ceramic aluminum plate is placed on the upper surface of the fixed plate, the fixed plate is pushed to be pushed into the inner cavity of the drying cylinder, the telescopic cylinder is started, the piston rod of the telescopic cylinder pushes the clamping block to clamp the two sides of the ceramic aluminum plate, and through the arrangement, the ceramic aluminum plate is more easily placed and taken out in the drying cylinder, meanwhile, the clamping of ceramic aluminum plates with different sizes is met, and the practicability is high;
(3) the screw rod is driven to rotate by the output shaft of the driving motor, the mounting plate is driven by the connecting piece on the outer peripheral surface of the screw rod to move towards the inside of the fixed cover, the mounting plate drives the sliding blocks at the bottoms of the two sides to move along the sliding rails, the mounting plate drives the drying cylinder at the top to move towards the direction of the end cover in the fixed cover, the drying cylinder is matched and clamped with the end cover, meanwhile, the lug on the end plate is matched and clamped with the groove formed in the turnover bottom plate, through the arrangement, the drying cylinder and the end cover can be automatically closed, the drying cylinder is convenient to dry, the manual labor loss is saved by not needing to manually pushing the drying cylinder or closing the end cover, the electric heating fan discharges hot air towards the telescopic air pipe, the hot air enters the inner cavity of the drying cylinder through the pipe connecting pipe base, the electric heating wire heats the inner cavity of the drying cylinder, the output end of the turnover cylinder drives the connecting plate to rotate, the connecting plate drives the turnover bottom plate to turn over, the end plate drives the end plate to turn over, and then drive ceramic aluminum plate on the fixed plate and overturn, dry the surfactant of ceramic aluminum plate ceramic surface, through the cooperation design of upset cylinder, connecting plate, upset bottom plate, end plate for ceramic aluminum plate can realize the upset in a stoving section of thick bamboo, and the electric heating wire that makes distribute can be abundant dry ceramic aluminum plate surface, effectively promotes drying efficiency.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a drying apparatus according to the present invention;
FIG. 2 is an internal structural view of the drying drum of the present invention;
FIG. 3 is a top view of the fixation plate of the present invention;
FIG. 4 is a plan view of the end cap of the present invention;
fig. 5 is an internal structural view of the fixing cover of the present invention.
In the figure: 1. a frame; 2. a fixed cover; 3. a drive motor; 4. a lead screw; 5. a slide rail; 6. mounting a plate; 7. a drying drum; 8. turning over the air cylinder; 9. a pipe connecting seat; 91. an air inlet; 10. a connecting plate; 11. turning over the bottom plate; 111. a groove; 12. a horizontal bar; 13. a rod sleeve; 14. a fixing plate; 15. a telescopic cylinder; 151. a clamping block; 16. an end cap; 17. an end plate; 171. a bump; 18. an electric heating wire; 19. an electric heating fan; 20. the air pipe is stretched.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution:
example 1
A preparation method of a ceramic aluminum-based copper-clad plate comprises the following steps:
the method comprises the following steps: uniformly spraying ceramic glaze on an aluminum plate by using a spray gun, and reinforcing at high temperature to form a ceramic aluminum plate;
step two: coating a surface active agent on the ceramic surface of a ceramic aluminum plate, pulling a fixed plate from an opening on one side of a drying cylinder, driving a rod sleeve at the bottom to move along a horizontal rod by the fixed plate, further driving the fixed plate to move out of an inner cavity of the drying cylinder, placing the ceramic aluminum plate on the upper surface of the fixed plate, pushing the fixed plate into the inner cavity of the drying cylinder, starting a telescopic cylinder, pushing a clamping block by a piston rod of the telescopic cylinder to clamp two sides of the ceramic aluminum plate by a driving motor output shaft, driving a screw rod to rotate by a connecting piece on the outer peripheral surface of the screw rod, driving a mounting plate to move towards a fixed cover by the mounting plate, driving sliding blocks at the bottoms of two sides to move along a sliding rail by the mounting plate, further driving a drying cylinder at the top to move towards the direction of an end cover in the fixed cover by the mounting plate, matching and clamping a lug on the end plate with a groove arranged on an overturning bottom plate, and discharging hot air towards a telescopic air pipe by an electric heating fan, hot air enters an inner cavity of the drying cylinder through the pipe connecting seat, an electric heating wire heats the inner cavity of the drying cylinder, the output end of the overturning cylinder drives the connecting plate to rotate, the connecting plate drives the overturning bottom plate to overturn, the overturning bottom plate drives the end plate to overturn, and further drives the ceramic aluminum plate on the fixed plate to overturn, and a surfactant on the ceramic surface of the ceramic aluminum plate is dried;
step three: coating a high-heat-conduction bonding layer on the ceramic surface of the dried ceramic aluminum plate, superposing the ceramic aluminum plate coated with the high-heat-conduction layer and a copper foil to form a superposed body, carrying out hot pressing on the superposed body in a vacuum hot press, and then carrying out cold pressing to obtain the ceramic aluminum-based copper-clad plate.
Specifically, in the step one, the strengthening temperature is 450 ℃, and the strengthening time is 3 min. The ceramic glaze is composed of alumina, silica, titanium oxide, boron oxide and alkali metal oxide, and the mass ratio is 5: 30: 20: 8: 38, the alkali metal oxide is composed of sodium oxide, potassium oxide and lithium oxide, the mass ratio is 4:3:1, and the spraying thickness of the porcelain glaze is 120 mu m. In the second step, the drying temperature is 180 ℃, the drying time is 10min, the surfactant is KH-560, the KH-560 solution is a mixed solution of KH-560 and acetone, and the proportion is KH-560: acetone =1: 10. The high heat conduction bonding layer is a mixture of tetrabromobisphenol A epoxy resin and aluminum oxide, wherein the tetrabromobisphenol A epoxy resin: alumina =1:1.2, the thickness of the high thermal conductivity bonding layer is 10 μm, and the inorganic nano-oxide comprises zinc oxide, titanium oxide, calcium oxide, antimony oxide, alumina, zirconium oxide, boron oxide or silicon oxide; and in the third step, the hot pressing temperature of the vacuum hot press is 170 ℃, the hot pressing time is 40min, the high pressure is 30Kg/cm2, and then cold pressing is carried out for 30 min until the temperature is cooled to room temperature, so that the ceramic aluminum-based copper-clad plate is prepared.
The thermal conductivity of the ceramic aluminum-based copper-clad plate prepared in the embodiment 1 is 3.75W/m.k, and the pressure resistance is 18 KV/mm.
Example 2
A preparation method of a ceramic aluminum-based copper-clad plate comprises the following steps:
the method comprises the following steps: uniformly spraying ceramic glaze on an aluminum plate by using a spray gun, and reinforcing at high temperature to form a ceramic aluminum plate;
step two: coating a surface active agent on the ceramic surface of a ceramic aluminum plate, pulling a fixed plate from an opening on one side of a drying cylinder, driving a rod sleeve at the bottom to move along a horizontal rod by the fixed plate, further driving the fixed plate to move out of an inner cavity of the drying cylinder, placing the ceramic aluminum plate on the upper surface of the fixed plate, pushing the fixed plate into the inner cavity of the drying cylinder, starting a telescopic cylinder, pushing a clamping block by a piston rod of the telescopic cylinder to clamp two sides of the ceramic aluminum plate by a driving motor output shaft, driving a screw rod to rotate by a connecting piece on the outer peripheral surface of the screw rod, driving a mounting plate to move towards a fixed cover by the mounting plate, driving sliding blocks at the bottoms of two sides to move along a sliding rail by the mounting plate, further driving a drying cylinder at the top to move towards the direction of an end cover in the fixed cover by the mounting plate, matching and clamping a lug on the end plate with a groove arranged on an overturning bottom plate, and discharging hot air towards a telescopic air pipe by an electric heating fan, hot air enters an inner cavity of the drying cylinder through the pipe connecting seat, an electric heating wire heats the inner cavity of the drying cylinder, the output end of the overturning cylinder drives the connecting plate to rotate, the connecting plate drives the overturning bottom plate to overturn, the overturning bottom plate drives the end plate to overturn, and further drives the ceramic aluminum plate on the fixed plate to overturn, and a surfactant on the ceramic surface of the ceramic aluminum plate is dried;
step three: and coating a high-heat-conduction bonding layer on the ceramic surface of the dried ceramic aluminum plate, superposing the ceramic aluminum plate coated with the high-heat-conduction layer and the copper foil to form a superposed body, carrying out hot pressing on the superposed body in a vacuum hot press, and then carrying out cold pressing to obtain the ceramic aluminum-based copper-clad plate.
Specifically, in the step one, the strengthening temperature is 570 ℃, and the strengthening time is 10 min. The ceramic glaze is composed of alumina, silica, titanium oxide, boron oxide and alkali metal oxide, and the mass ratio is 3: 35: 18: 5: 35, the alkali metal oxide is composed of sodium oxide, potassium oxide and lithium oxide, the mass ratio is 4:3:1, and the enamel spraying thickness is 150 mu m. In the second step, the drying temperature is 180 ℃, the drying time is 10min, the surfactant is KH-560, the KH-560 solution is a mixed solution of KH-560 and acetone, and the proportion is KH-560: acetone =1: 10. The high heat conduction bonding layer is a mixture of tetrabromobisphenol A epoxy resin and aluminum nitride, wherein the tetrabromobisphenol A epoxy resin: aluminum nitride =1:1.2, the thickness of the high thermal conductivity bonding layer is 30 μm, and the inorganic nano-oxide includes zinc oxide, titanium oxide, calcium oxide, antimony oxide, aluminum oxide, zirconium oxide, boron oxide or silicon oxide; and in the third step, the hot pressing temperature of the vacuum hot press is 190 ℃, the hot pressing time is 50min, the high pressure is 30Kg/cm2, and then cold pressing is carried out for 30 min until the temperature is cooled to room temperature, so that the ceramic aluminum-based copper-clad plate is prepared.
The thermal conductivity of the ceramic aluminum-based copper-clad plate prepared in the embodiment 2 is 4.5/m.k, and the pressure resistance is 40 KV/mm.
Referring to fig. 1-5, the drying apparatus includes a frame 1, a screw 4 is installed on the top of the frame 1, slide rails 5 are installed on both sides of the screw 4, one end of the screw 4 is connected to an output shaft of a driving motor 3, the driving motor 3 is installed on the top of the frame 1 through a motor fixing seat, a connecting member on the outer peripheral surface of the screw 4 is fixedly connected to the lower end surface of a mounting plate 6, a slide block sliding on the upper surface of the slide rail 5 is fixed on the lower end surface of the mounting plate 6, a drying cylinder 7 is installed on the top of the mounting plate 6 through a fixing seat, an opening is formed on one side of the drying cylinder 7, a turnover cylinder 8 is installed on the side wall of the drying cylinder 7 away from the opening, the output end of the turnover cylinder 8 penetrates through the side wall of the drying cylinder 7 and is fixedly connected to a connecting plate 10, the connecting plate 10 is fixed on one side of the upper end surface of a turnover bottom plate 11, two horizontal rods 12 are installed on the upper end surface of the turnover bottom plate 11, a rod sleeve 13 is slidably installed on the outer peripheral surface of the horizontal rods 12, the rod sleeve 13 is fixed on the lower end face of the fixed plate 14, four telescopic air cylinders 15 are symmetrically arranged on two sides of the top of the fixed plate 14, a clamping block 151 is arranged at the end part of a piston rod of each telescopic air cylinder 15, a groove 111 is formed in the surface of one side, away from the connecting plate 10, of the overturning bottom plate 11, an end cover 16 is arranged on the inner wall of one side of the fixed cover 2, the end cover 16 is matched and clamped with an opening on one side of the drying cylinder 7, an end plate 17 is rotatably arranged in the end cover 16, a convex block 171 is fixedly arranged on the end plate 17, the convex block 171 is matched and clamped with the groove 111 on the overturning bottom plate 11, six electric heating wires 18 are arranged at equal radian around the end plate 17, the electric heating wires 18 are arranged on the inner wall of the end cover 16, an air inlet 91 is formed in the middle position of the top of the drying cylinder 7, a connecting pipe seat 9 is arranged on the air inlet 91, a telescopic air pipe 20 is communicated with the connecting pipe seat 9, one end, away from the connecting pipe seat 9, penetrates through the upper wall of the fixed cover 2 and is connected to an air outlet of an electric heating fan 19, the electric heating fan 19 is arranged on the upper wall of the fixed cover 2.
Referring to fig. 1-5, the drying apparatus of the present embodiment works as follows:
pulling a fixing plate 14 from the opening at one side of a drying cylinder 7, the fixing plate 14 driving a rod sleeve 13 at the bottom to move along a horizontal rod 12, further driving the fixing plate 14 to move out of the inner cavity of the drying cylinder 7, placing a ceramic aluminum plate on the upper surface of the fixing plate 14, pushing the fixing plate 14 to push the fixing plate into the inner cavity of the drying cylinder 7, opening a telescopic cylinder 15, a piston rod of the telescopic cylinder 15 pushing a clamping block 151 to clamp two sides of the ceramic aluminum plate, a driving motor 3 output shaft driving a lead screw 4 to rotate, a connecting piece at the outer peripheral surface of the lead screw 4 driving a mounting plate 6 to move towards a fixing cover 2, the mounting plate 6 driving sliding blocks at the bottoms at two sides to move along a sliding rail 5, further the mounting plate 6 driving the drying cylinder 7 at the top to move towards an end cover 16 in the fixing cover 2, the drying cylinder 7 and the end cover 16 being matched and clamped, and meanwhile, a lug 171 on the end plate 17 and a groove 111 arranged on an overturning bottom plate 11 being matched and clamped, the hot-air is discharged into towards flexible trachea 20 to electric fan 19, and the hot-air gets into 7 inner chambers of a stoving section of thick bamboo through nozzle 9, and electric heating wire 18 heats 7 inner chambers of a stoving section of thick bamboo, and 8 output of upset cylinders drive connecting plate 10 and rotate, and connecting plate 10 drives 11 upsets of upset bottom plate, and upset bottom plate 11 drives the upset of end plate 17, and then drives ceramic aluminum plate on the fixed plate 14 and overturn, dries the surfactant of ceramic aluminum plate ceramic face.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (7)
1. The preparation method of the ceramic aluminum-based copper-clad plate is characterized by comprising the following steps:
the method comprises the following steps: uniformly spraying ceramic glaze on an aluminum plate by using a spray gun, and reinforcing at high temperature to form a ceramic aluminum plate;
step two: coating a layer of surfactant on the ceramic surface of the ceramic aluminum plate, placing the ceramic aluminum plate on the upper surface of a fixed plate, pushing a clamping block by a piston rod of a telescopic cylinder to clamp two sides of the ceramic aluminum plate, driving a screw rod to rotate by an output shaft of a driving motor, driving a mounting plate to move towards a fixed cover by a connecting piece on the outer peripheral surface of the screw rod, driving sliding blocks at the bottoms of two sides to move along a sliding rail by the mounting plate, driving a drying cylinder at the top to move towards an end cover in the fixed cover by the mounting plate, matching and clamping the drying cylinder with the end cover, matching and clamping a lug on an end plate with a groove arranged on a turnover bottom plate, discharging hot air by an electric heating fan towards a telescopic air pipe, feeding the hot air into an inner cavity of the drying cylinder through a pipe connecting pipe seat, heating the inner cavity of the drying cylinder by an electric heating wire, driving a connecting plate to rotate by an output end of the turnover cylinder, driving the turnover bottom plate to turn over, driving the end plate to turn over, then the ceramic aluminum plate on the fixed plate is driven to turn over, and the surfactant on the ceramic surface of the ceramic aluminum plate is dried;
step three: coating a high-heat-conduction bonding layer on the ceramic surface of the dried ceramic aluminum plate, superposing the ceramic aluminum plate coated with the high-heat-conduction layer and a copper foil to form a superposed body, carrying out hot pressing on the superposed body in a vacuum hot press, and then carrying out cold pressing to obtain the ceramic aluminum-based copper-clad plate.
2. The preparation method of the ceramic aluminum-based copper-clad plate according to claim 1, wherein in the first step, the reinforcement temperature is 450-570 ℃, and the reinforcement time is 3-10 min.
3. The method for preparing the ceramic-aluminum-based copper-clad plate according to claim 1, wherein the ceramic glaze is composed of alumina, silica, titanium oxide, boron oxide and alkali metal oxide, and the mass ratio of each component is (1-5): (25-35): (15-25): (2-10): (20-40), wherein the alkali metal oxide is composed of sodium oxide, potassium oxide and lithium oxide, the mass ratio of the components is 4:3:1, and the enamel spraying thickness is 10-200 μm.
4. The method for preparing the ceramic-aluminum-based copper-clad plate according to claim 1, wherein in the second step, the drying temperature is 140 ℃ to 200 ℃, the drying time is 5 min to 30 min, and the surfactant is OP-10, OP-30, OP-40 or KH-560.
5. The method for preparing the ceramic-aluminum-based copper-clad plate according to claim 1, wherein the high thermal conductive bonding layer is formed by mixing epoxy resin and inorganic nano-oxide, the thickness of the high thermal conductive bonding layer is 10-30 μm, and the inorganic nano-oxide comprises zinc oxide, titanium oxide, calcium oxide, antimony oxide, aluminum oxide, zirconium oxide, boron oxide or silicon oxide; the particle size of the inorganic nano oxide is 1-150 nm.
6. The method for preparing the ceramic aluminum-based copper-clad plate according to claim 1, wherein the hot pressing temperature of the vacuum hot press in the third step is 140-220 ℃, and the hot pressing time is 20-60 min.
7. The method for preparing the ceramic-aluminum-based copper-clad plate according to claim 1, wherein the drying equipment comprises the following working steps: pulling a fixed plate from the opening at one side of the drying cylinder, driving a rod sleeve at the bottom to move along a horizontal rod by the fixed plate, further driving the fixed plate to move out of the inner cavity of the drying cylinder, placing a ceramic aluminum plate on the upper surface of the fixed plate, pushing the fixed plate to push the fixed plate into the inner cavity of the drying cylinder, starting a telescopic cylinder, pushing a clamping block by a telescopic cylinder piston rod to clamp two sides of the ceramic aluminum plate, driving a lead screw to rotate by a driving motor output shaft, driving a mounting plate to move towards a fixed cover by a connecting piece on the outer peripheral surface of the lead screw, driving a sliding block at the bottom of two sides to move along a sliding rail by the mounting plate, further driving a drying cylinder at the top to move towards the direction of an end cover in the fixed cover by the mounting plate, matching and clamping the drying cylinder with the end cover, simultaneously, matching and clamping a lug on an end plate with a groove arranged on a turnover bottom plate, discharging hot air into the inner cavity of the drying cylinder by an electric heating fan towards a telescopic air pipe base, electric heating wire heats a stoving section of thick bamboo inner chamber, and upset cylinder output drives the connecting plate and rotates, and the connecting plate drives the upset of upset bottom plate, and the upset bottom plate drives the end plate upset, and then drives ceramic aluminum plate on the fixed plate and overturn, dries the surfactant of ceramic aluminum plate ceramic face.
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| JPH04105389A (en) * | 1990-08-24 | 1992-04-07 | Hitachi Chem Co Ltd | Manufacture of ceramic composite copper-clad laminate |
| CN104363697A (en) * | 2014-10-16 | 2015-02-18 | 金壬海 | Copper-clad plate with aluminum substrate and media filled with ceramics and method for manufacturing copper-clad plate |
| CN208128651U (en) * | 2018-04-17 | 2018-11-20 | 莆田市龙腾电子科技有限公司 | Drying unit is used in a kind of printing of wiring board |
| CN109489377A (en) * | 2018-11-22 | 2019-03-19 | 张晓艳 | A kind of ceramics drying equipment |
| CN209230215U (en) * | 2018-08-27 | 2019-08-09 | 扬州市立达树脂有限公司 | A kind of easy-to-turn coating additive dryer |
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| JPH04105389A (en) * | 1990-08-24 | 1992-04-07 | Hitachi Chem Co Ltd | Manufacture of ceramic composite copper-clad laminate |
| CN104363697A (en) * | 2014-10-16 | 2015-02-18 | 金壬海 | Copper-clad plate with aluminum substrate and media filled with ceramics and method for manufacturing copper-clad plate |
| CN208128651U (en) * | 2018-04-17 | 2018-11-20 | 莆田市龙腾电子科技有限公司 | Drying unit is used in a kind of printing of wiring board |
| CN209230215U (en) * | 2018-08-27 | 2019-08-09 | 扬州市立达树脂有限公司 | A kind of easy-to-turn coating additive dryer |
| CN109489377A (en) * | 2018-11-22 | 2019-03-19 | 张晓艳 | A kind of ceramics drying equipment |
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