CN117182097A - Fin type substrate radiator and preparation method thereof - Google Patents
Fin type substrate radiator and preparation method thereof Download PDFInfo
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- CN117182097A CN117182097A CN202311121446.5A CN202311121446A CN117182097A CN 117182097 A CN117182097 A CN 117182097A CN 202311121446 A CN202311121446 A CN 202311121446A CN 117182097 A CN117182097 A CN 117182097A
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- 239000000758 substrate Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000005245 sintering Methods 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 27
- 238000007639 printing Methods 0.000 claims abstract description 20
- 238000005238 degreasing Methods 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 239000000853 adhesive Substances 0.000 claims abstract description 15
- 230000001070 adhesive effect Effects 0.000 claims abstract description 15
- 238000013499 data model Methods 0.000 claims abstract description 11
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 17
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000010146 3D printing Methods 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000001746 injection moulding Methods 0.000 abstract description 7
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 239000011118 polyvinyl acetate Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Abstract
The invention relates to a fin type substrate radiator and a preparation method thereof, wherein the preparation method comprises the following steps: s1, designing a model: designing a product model; the product model comprises a substrate and a plurality of fins arranged on the substrate in an array manner; the cross section of the fin is continuously and circularly changed from small to large to small or from large to small to large along the extending direction of the fin; s2, data processing: scaling the product model according to the scaling coefficient, and performing data processing on the product model; s3, introducing the product printing data model into an adhesive spraying 3D printer, and performing adhesive spraying printing by the adhesive spraying 3D printer according to the product printing data model, and preparing to obtain a green body; s4, degreasing the green body to obtain a degreased blank; s5, sintering the degreased blank to obtain a sintered blank. The invention is based on the net forming technology of powder injection molding, and has larger heat dissipation area and better heat dissipation effect.
Description
Technical Field
The invention relates to the field of substrate radiators and preparation thereof, in particular to a fin type substrate radiator and a preparation method thereof.
Background
A fin-type substrate heat sink is one of the most widely used heat sinks, particularly in electronic components. The heat generated by the electronic component is transferred to the air through the heat conduction of the substrate with the fins, and along with the increasing power consumption of the electronic component and the increasing miniaturization and compactification of the electronic component, the fin type substrate radiator manufactured by traditional processing can not meet the heat dissipation requirement.
In the conventional fin-type substrate radiator, a substrate and fins are respectively and independently prepared and then assembled, so that in the assembly process, the fins and the substrate have splice seams, and the heat conduction performance is affected. Meanwhile, the fin type substrate radiator has smaller volume, so the fins are generally in a relatively simple shape such as a column shape, a sheet shape and the like. Therefore, the conventional processing method is difficult or impossible to form complex air channels between the fins, because the conventional processing of the fins is difficult or impossible to prepare the fins with complex surfaces.
Disclosure of Invention
The first object of the present invention is to provide a method for preparing a fin-type substrate heat sink, which is based on a net forming technology of powder injection molding, and can effectively solve the problems that a substrate and a fin cannot be integrally formed, a fin is spliced, a fin capable of forming a complex micro air channel cannot be prepared in the conventional manufacturing, and is favorable for preparing the fin-type substrate heat sink.
The technical scheme for realizing the first purpose of the invention is as follows: the preparation method of the fin type substrate radiator comprises the following steps:
s1, designing a model: designing a product model; the product model is designed based on a fin-type substrate radiator; the fin type substrate radiator comprises a substrate and a plurality of fins arranged on the substrate in an array manner; the fins extend upwards from the base plate vertically; the cross section of the fin is continuously and circularly changed from small to large to small or from large to small to large along the extending direction of the fin; the intervals of the fins are equal; gaps between the fins form an air channel for air to flow; the air channels between adjacent fins form continuous and uniformly distributed gradient pressure difference areas along the extending direction of the air channels; the gradient pressure difference area is formed by the fact that gaps between adjacent fins change in size due to the change of the cross sections of the adjacent fins, the pressure of the part with the large gaps is larger, and the pressure of the part with the small gaps is smaller; wherein continuous cycling means continuous cycling of the process of changing from small to large to small or from large to small to large, that is, the change of the cross-sectional dimension of the fin in the next cycle is not necessarily completely the same as the change of the cross-sectional dimension in the previous cycle, but only the process of changing from small to large to small or from large to small to large;
s2, data processing: scaling the product model according to a scaling coefficient, performing patch processing, repairing, slicing and setting a printing layer thickness on the product model, thereby obtaining a product printing data model adapting to the adhesive spraying 3D printing process; wherein the scaling factor is 1.15-1.22;
s3, introducing the product printing data model into an adhesive spraying 3D printer, and performing adhesive spraying printing by the adhesive spraying 3D printer according to the product printing data model, and preparing to obtain a green body;
s4, degreasing the green body to obtain a degreased blank;
s5, sintering the degreased blank to obtain a sintered blank.
The powder and the binder are sintered after passing through a 3D printer to produce a green body, the binder is burnt in the sintering process, the blank is reduced, and finally the green body is a finished product, and the process is a shrinkage process, and scaling factors are set to ensure the size of the finished product.
Further, the fin is hollow and has a wall thickness of 0.5 to 1mm. The fins are designed to be hollow internally and are manufactured based on a powder injection molding process, and the cross section width of the fins is unequal and continuously changed, so that the fins are easy to shrink and inconsistent in sintering, and the fins are designed to be hollow along with the shape, so that the subsequent product sintering is facilitated.
In step S5, the sintering method includes one or a combination of two or more of vacuum sintering, argon sintering and hydrogen sintering, and the zirconia powder is pre-buried after the degreased blank is placed on the alumina setter plate during sintering, wherein the zirconia powder adopts near spherical powder, and the grain size direction of the zirconia powder is 1-30 μm. The zirconia powder is used for embedding, so that the fins can be well supported, and the nearly spherical zirconia powder can keep good fluidity, so that fine structure sintering on the product can be ensured not to deform.
The binder spraying 3D printing is a new technology developed in recent years of additive manufacturing technology, three-dimensional solid models of components are generated in a computer by using three-dimensional modeling software, layering is carried out on the three-dimensional solid models with a certain wall thickness, processed data are led into a printer, the binder is sprayed into a metal powder bed through a spray head, and the products are formed by printing layer by layer. And the binder comprises one or more than two of polyformaldehyde, polyethylene, paraffin, polypropylene, polyvinyl alcohol and polyvinyl acetate.
The degreasing in the step S4 includes one or a combination of two or more of acid-catalyzed degreasing, thermal degreasing and solvent degreasing. Since the degreasing process is a degreasing step in the conventional powder injection molding process, specific technical parameters and process steps are not described herein.
The second object of the present invention is to provide a fin-type substrate radiator, in which the shape of the outer wall of the fin is complex, so that the heat dissipation area of the fin is increased, and meanwhile, a complex air duct with a gradient pressure difference region is formed between the fins, which is beneficial to guiding the flow direction and path of wind speed through the gradient pressure difference region, enhancing the flow of wind speed and improving the heat dissipation efficiency of the fin.
The technical scheme for realizing the second purpose of the invention is as follows: the invention relates to a fin type substrate radiator, which comprises a substrate and a plurality of fins arranged on the substrate in an array manner; the fins extend upwards from the base plate vertically; the cross section of the fin is continuously and circularly changed from small to large to small or from large to small to large along the extending direction of the fin; the intervals of the fins are equal; gaps between the fins form an air channel for air to flow; the air channels between adjacent fins form continuous and uniformly distributed gradient pressure difference areas along the extending direction of the air channels.
Further, the fin includes a column body on which a plurality of diameter-changing portions are arranged in a straight line along an extending direction of the fin.
Further, the diameter-changing portion includes a plurality of discontinuous curved surfaces circumferentially distributed along the axis of the fin; the discontinuous curved surface comprises one or more than two of an arc and a sharp angle.
Further, the number of the fins is 64, the distance is 2 mm-4 mm, and the radius of the column body is 0.5 mm-1 mm.
Further, an air inlet side groove is formed in the base plate; the air inlet side groove comprises one of a square groove or a round groove.
The invention has the positive effects that: (1) The invention is based on the powder injection molding net forming technology, can effectively solve the problems that the substrate and the fins cannot be integrally formed, the fins are spliced and the like in the traditional manufacturing, and provides favorable conditions for preparing the fin type substrate radiator.
(2) The fin outer wall of the fin type baseplate radiator is complex in shape, so that the radiating area of the fin is increased, meanwhile, a complex air channel with a gradient pressure difference area is formed between the fins, the gradient pressure difference area is beneficial to guiding the wind speed flowing direction and path, the wind speed flowing is intensified, and the radiating efficiency of the fin is improved.
(3) According to the invention, the zirconia powder is pre-buried during sintering, so that the fine structure on the product can be effectively ensured not to be deformed during sintering.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
FIG. 1 is a schematic diagram of a fin-type substrate heat sink according to the present invention;
FIG. 2 is a top view of a finned substrate heat sink in accordance with the present invention;
FIG. 3 is a schematic illustration of the gradient pressure differential zones between adjacent fins in the present invention;
FIG. 4 is a schematic view of a fin according to the present invention;
FIG. 5 is a top view of a fin according to the present invention;
FIG. 6 is a cross-sectional view of a fin according to the present invention.
Detailed Description
The preparation method of the fin type substrate radiator comprises the following steps:
s1, designing a model: designing a product model; the product model is designed based on a fin-type substrate radiator; referring to fig. 1 and 2, the fin-type substrate heat sink includes a substrate 1 and a plurality of fins 2 arrayed on the substrate; the fin 2 comprises a column body 21, and 5 drum-shaped reducing parts 22 are linearly arranged on the column body 21 along the extending direction of the fin 2; the fins 2 extend upwards perpendicular to the base plate 1; the intervals of the fins 2 are equal; gaps between the fins 2 and the fins 2 form an air channel for air to flow; the air channels between the adjacent fins 2 form gradient pressure difference areas 3 which are continuously and uniformly distributed along the extending direction; the gradient pressure difference area 3 is formed by the fact that the gaps between the adjacent fins 2 change in size due to the change of the cross sections of the gaps, the pressure of the part with large gaps is larger, and the pressure of the part with small gaps is smaller;
wherein the number of fins 2 is 64, and the interval is 2.95mm; the height of the fin 2 is 4.5mm, and the radius R1 of the column 21 is 0.5mm; the radius R2 of the diameter-changing part 22 is 0.77mm, and the height of the diameter-changing part 22 is 0.9mm; the fin 2 is hollow, and the wall thickness of the fin is 0.5mm; an air inlet side groove 11 is formed in the base plate 1; the air inlet side groove 11 comprises a square groove, the length of the square groove is 8.75mm, and the width of the square groove is 0.4mm;
s2, data processing: scaling the product model according to a scaling coefficient, performing patch processing, repairing, slicing and setting a printing layer thickness on the product model, thereby obtaining a product printing data model adapting to the adhesive spraying 3D printing process; wherein the scaling factor is 1.19;
s3, introducing the product printing data model into an adhesive spraying 3D printer, and performing adhesive spraying printing by the adhesive spraying 3D printer according to the product printing data model, and preparing to obtain a green body;
s4, degreasing the green body to obtain a degreased blank;
s5, sintering the degreased blank to obtain a sintered blank.
The fins 2 are designed to be hollow internally based on a powder injection molding process, and the fins 2 are designed to be hollow along with the shape due to the fact that the cross section widths of the fins 2 are unequal and continuously changed and are easy to shrink and inconsistent in sintering, so that subsequent product sintering is facilitated.
The binder spraying 3D printing is a new technology developed in recent years of additive manufacturing technology, three-dimensional solid models of components are generated in a computer by using three-dimensional modeling software, layering is carried out on the three-dimensional solid models with a certain wall thickness, processed data are led into a printer, the binder is sprayed into a metal powder bed through a spray head, and the products are formed by printing layer by layer. And the binder comprises one or more than two of polyformaldehyde, polyethylene, paraffin, polypropylene, polyvinyl alcohol and polyvinyl acetate.
The degreasing in the step S4 includes one or a combination of two or more of acid-catalyzed degreasing, thermal degreasing and solvent degreasing. Since the degreasing process is a degreasing step in the conventional powder injection molding process, specific technical parameters and process steps are not described herein.
In the step S5, the sintering mode adopts argon sintering, and after the degreasing blank is placed on an alumina setter plate during sintering, zirconia powder is used for embedding, wherein the zirconia powder adopts nearly spherical powder, and the grain diameter direction of the zirconia powder is 1-30 mu m. The zirconia powder is pre-buried, so that the fins 2 can be well supported, and the nearly spherical zirconia powder can keep good fluidity, so that fine structure sintering on the product can be ensured not to deform. During sintering, the sintering temperature is set to 1350 ℃, the heat preservation time is 10 hours, the sintering atmosphere is Ar, the partial pressure of 10KPa, and the furnace cooling is performed after the furnace cooling reaches 200 ℃.
The fin type substrate radiator prepared by the preparation process comprises a substrate 1 and a plurality of fins 2 arranged on the substrate 1 in an array manner; the fin 2 comprises a column body 21, and 5 drum-shaped reducing parts 22 are linearly arranged on the column body 21 along the extending direction of the fin 2; the fins 2 extend upwards perpendicular to the base plate 1; the intervals of the fins 2 are equal; gaps between the fins 2 and the fins 2 form an air channel for air to flow; the air channels between the adjacent fins 2 form gradient pressure difference areas 3 which are continuously and uniformly distributed along the extending direction;
wherein the number of fins 2 is 64, and the interval is 2.95mm; the height of the fin 2 is 4.5mm, and the radius R1 of the column 21 is 0.5mm; the radius R2 of the diameter-changing part 22 is 0.77mm, and the height of the diameter-changing part 22 is 0.9mm; the fin 2 is hollow, and the wall thickness of the fin is 0.5mm; an air inlet side groove 11 is formed in the base plate 1; the air inlet side groove 11 comprises a square groove, wherein the length of the square groove is 8.75mm, and the width of the square groove is 0.4mm.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (8)
1. The preparation method of the fin type substrate radiator is characterized by comprising the following steps of:
s1, designing a model: designing a product model; the product model is designed based on a fin-type substrate radiator; the fin type substrate radiator comprises a substrate and a plurality of fins arranged on the substrate in an array manner; the fins extend upwards from the base plate vertically; the cross section of the fin is continuously and circularly changed from small to large to small or from large to small to large along the extending direction of the fin; the intervals of the fins are equal; gaps between the fins form an air channel for air to flow; the air channels between adjacent fins form continuous and uniformly distributed gradient pressure difference areas along the extending direction of the air channels;
s2, data processing: scaling the product model according to a scaling coefficient, performing patch processing, repairing, slicing and setting a printing layer thickness on the product model, thereby obtaining a product printing data model adapting to the adhesive spraying 3D printing process; wherein the scaling factor is 1.15-1.22;
s3, introducing the product printing data model into an adhesive spraying 3D printer, and performing adhesive spraying printing by the adhesive spraying 3D printer according to the product printing data model, and preparing to obtain a green body;
s4, degreasing the green body to obtain a degreased blank;
s5, sintering the degreased blank to obtain a sintered blank.
2. The method for manufacturing a fin-type substrate heat sink according to claim 1, wherein: the fin is hollow, and the wall thickness of the fin is 0.5-1 mm.
3. The method for manufacturing a fin-type substrate heat sink according to claim 2, wherein: in the step S5, the sintering mode includes one or a combination of more than two of vacuum sintering, argon sintering and hydrogen sintering, and after the degreasing blank is placed on the alumina setter plate during sintering, zirconia powder is used for embedding, wherein the zirconia powder adopts near spherical powder, and the grain diameter direction of the zirconia powder is 1-30 μm.
4. A fin-type substrate heat sink prepared according to claim 1 or 2 or 3, characterized in that: the device comprises a substrate and a plurality of fins arranged on the substrate in an array manner; the fins extend upwards from the base plate vertically; the cross section of the fin is continuously and circularly changed from small to large to small or from large to small to large along the extending direction of the fin; the intervals of the fins are equal; gaps between the fins form an air channel for air to flow; the air channels between adjacent fins form continuous and uniformly distributed gradient pressure difference areas along the extending direction of the air channels.
5. The fin-type substrate heat sink of claim 4, wherein: the fin comprises a cylinder, and a plurality of reducing parts are linearly arranged on the cylinder along the extending direction of the fin.
6. The fin-type substrate heat sink of claim 5, wherein: the diameter-changing part comprises a plurality of discontinuous curved surfaces distributed along the circumference of the axis of the fin; the discontinuous curved surface comprises one or more than two of an arc and a sharp angle.
7. The fin-type substrate heat sink of claim 6, wherein: the number of the fins is 64, the distance between the fins is 2 mm-4 mm, and the radius of the cylinder is 0.5 mm-1 mm.
8. The fin-type substrate heat sink of claim 4, wherein: an air inlet side groove is formed in the base plate; the air inlet side groove comprises one of a square groove or a round groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311121446.5A CN117182097A (en) | 2023-09-01 | 2023-09-01 | Fin type substrate radiator and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311121446.5A CN117182097A (en) | 2023-09-01 | 2023-09-01 | Fin type substrate radiator and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117182097A true CN117182097A (en) | 2023-12-08 |
Family
ID=88991726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311121446.5A Pending CN117182097A (en) | 2023-09-01 | 2023-09-01 | Fin type substrate radiator and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117182097A (en) |
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2023
- 2023-09-01 CN CN202311121446.5A patent/CN117182097A/en active Pending
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