CN101336064B - Processing method of graphite heat-conducting fin - Google Patents
Processing method of graphite heat-conducting fin Download PDFInfo
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- CN101336064B CN101336064B CN2007101126596A CN200710112659A CN101336064B CN 101336064 B CN101336064 B CN 101336064B CN 2007101126596 A CN2007101126596 A CN 2007101126596A CN 200710112659 A CN200710112659 A CN 200710112659A CN 101336064 B CN101336064 B CN 101336064B
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- graphite
- conducting fin
- heat
- graphite heat
- thickness
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Abstract
The invention discloses a processing method of graphite heat conducting fins, using a group of male dies and female dies to clamp and press the graphite conduction plate to become the graphite heat conducting fins with specific contour exterior, and using holderups arranged between the male dies and the females dies, controlled to continue to press a first thickness to a scheduled second thickness of the graphite heat conducting fins, thereby advancing density of the graphite and improving conduction efficiency. Furthermore, the bent graphite heat conducting fins are extruded, to reinforce the problems of hard conduction at the loose bending. In addition, after the heat conducting fins are tabled on the surfaces of the graphite heat conducting fins, the graphite heat conducting fins are extruded again, causing the conducting fins more fixedly connected with the surfaces of the graphite heat conducting fins.
Description
Technical field
The present invention relates to a kind of processing method of graphite heat-conducting fin, refer to that especially a kind of utilization is to lead the processing method that electronic components such as the chip that looses produce the graphite heat-conducting fin of heat.
Background technology
Graphite heat-conducting fin often is used in the electronic installation such as mobile computer, is attached at processor, the chipset of high heat ... in electronic component, to lead the heat that the electronic component that looses is produced.
The graphite heat-conducting fin Main Ingredients and Appearance is formed by graphite and filler (filler).The heat conduction of graphite energy, filler makes the soft easy processing of whole graphite heat-conducting fin matter.Sometimes, attach for cooperating electronic components such as chip, can make the upper and lower concave, convex moulding of graphite heat-conducting fin, can cooperate the external form of electronic component from the upper and lower surface of graphite heat-conducting fin with mould backfin graphite heat-conducting fin.
See also Fig. 1, Fig. 1 is the schematic diagram of known technology after with graphite heat-conducting fin 2 backfins.This known technology with graphite heat-conducting fin 2 backfins after, the effect that bending place 4 is stretched, make this graphite density partly can be starkly lower than the graphite density at dull and stereotyped place 6, therefore, the thermal conduction rate of the bending place 4 of graphite heat-conducting fin 2 will reduce, in other words, this bending place 4 can form the obstruction that whole graphite heat-conducting fin 2 conducts heat.
In addition, see also Fig. 2, Fig. 2 is the schematic diagram of known technology radiating subassembly 10.Fig. 2 shows U.S. Patent Publication No. US2003/0116312A1 patent, shown in graphic be a plurality of heat sinks 14 in graphite heat-conducting fin 2 upper surface intercalations, this known technology constitutes a desirable radiating subassembly 10, yet, heat sink 14 often is difficult to firm being intercalated in the soft graphite heat-conducting fin 2, runs into external force and is easy to destroyed with regard to coming off.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of processing method of graphite heat-conducting fin, can significantly improve heat transfer efficiency, and, can reinforcement diminish and the problem of heat transfer efficiency variation to solve bending place graphite density.
Another technical problem that the present invention will solve provides the processing method of graphite heat-conducting fin, and it makes that heat sink can be more firm is intercalated in the graphite heat-conducting fin surface.
For solving the problems of the technologies described above, the present invention proposes a kind of processing method of graphite heat-conducting fin, this graphite heat-conducting fin has a contoured external form, and this processing method comprises the following step:
At first, cooperate corresponding one group of male and female mould double team and crush-cutting one graphite heat conducting sheet material, become the graphite heat-conducting fin of this contoured external form of tool to cut this graphite heat conducting sheet material, wherein this graphite heat-conducting fin has one first thickness.
Then, this group male and female mould continues the graphite heat-conducting fin after extrusion cuts, utilization is arranged on the backform of this group male and female intermode, second thickness that control makes this group male and female mould that this graphite heat-conducting fin extremely is scheduled to from this first thickness extrusion, and then the graphite density of this graphite heat-conducting fin is improved, also improved the heat transfer efficiency of graphite heat-conducting fin.
Further, after cutting the graphite heat-conducting fin of providing this contoured external form, this processing method further also comprises the following step:
With this group male and female mould this graphite heat-conducting fin of upper and lower surperficial backfin, make the upper and lower concave, convex moulding of this graphite heat-conducting fin from this graphite heat-conducting fin.
Follow-up, from the second extremely predetermined thickness of this first thickness extrusion, can make the graphite density of this graphite heat-conducting fin bending place be similar to the graphite density of this graphite heat-conducting fin the graphite heat-conducting fin after the backfin in the flat board place of this second thickness.
In addition, after cutting the graphite heat-conducting fin of providing this contoured external form, this processing method can also further comprise the following step:
At first, the upper surface in this graphite heat-conducting fin produces at least one first depressed part.
Then, the bottom of a heat sink is embedded in this first depressed part, wherein the side of the bottom of this heat sink laterally has at least one second depressed part.
Follow-up, from the second extremely predetermined thickness of this first thickness extrusion, this first depressed part side graphite heat-conducting fin partly is absorbed in this second depressed part this graphite heat-conducting fin, make this heat sink firmly be connected in this graphite heat-conducting fin.
Therefore, by utilization of the present invention to lead the processing method that electronic components such as the chip that looses are produced hot graphite heat-conducting fin, utilize the backform of male and female intermode, control extrusion graphite heat-conducting fin is to predetermined thin thickness, can significantly improve graphite density and improves heat transfer efficiency.And, utilize the method for this extrusion, can reinforcement diminish and the problem of heat transfer efficiency variation to solve bending place graphite density.In addition, also utilize the method for this extrusion, what make that heat sink can be more firm is intercalated in the graphite heat-conducting fin surface.
Description of drawings
Fig. 1 is the schematic diagram of graphite heat-conducting fin after the known technology backfin;
Fig. 2 is the schematic diagram of known technology radiating subassembly;
Fig. 3 is the flow chart of graphite heat conducting slice processing method of the present invention;
Fig. 4 is the schematic diagram of graphite heat-conducting fin of the present invention;
Fig. 5 is the horizontal section schematic diagram of the die needed structure of Fig. 3 of the present invention;
Fig. 6 is the flow chart that the present invention makes the upper and lower concave, convex moulding of graphite heat-conducting fin;
Fig. 7 is the schematic diagram that the present invention cooperates Fig. 6 mould structure;
Fig. 8 is that the present invention makes heat sink be intercalated in flow chart on the graphite heat-conducting fin;
Fig. 9 is the schematic diagram of graphite heat-conducting fin that Fig. 8 forms;
Fig. 9 A, B, C are the schematic diagrames of other three kinds of embodiment of Fig. 9; And
Figure 10 is that the stream that graphite material heat sink of the present invention is made becomes figure.
Description of reference numerals:
Radiating subassembly 10
Graphite heat-conducting fin 2,30 contoured external forms 31
Graphite heat conducting sheet material 35 mould structures 39
The first thickness D1, the second thickness D2
4,52 dull and stereotyped places 6,54, bending place
Second depressed part, 64 heat sinks 14,70
Embodiment
See also Fig. 3, Fig. 3 is the flow chart of graphite heat-conducting fin 30 processing methods of the present invention.The invention relates to a kind of processing method of graphite heat-conducting fin 30, the graphite heat-conducting fin 30 after processing as Fig. 4, have a contoured external form 31, as the graphite heat-conducting fin among the figure 30 is that two layers of aluminium foil, 32 double teams, one graphite linings 34 is formed, on the practice, can only not need any thin layer double team separately with graphite linings 34, or partly or whole aluminium foil 32 replaces with Copper Foil or gum.Further, graphite linings 34 is made up of graphite and filler (filler), and graphite provides with the function of conducting heat, and filler makes the soft and easy processing of its matter.
This processing method cooperates the mould structure 39 of Fig. 5, carries out the step of described processing method.Mould structure 39 comprises a male model 40 and a master mold 42, male model 40 sides are provided with backform 41, master mold 42 inner bottom surface are provided with interior retainer plate 44, master mold 42 and interior retainer plate 44 all can be arranged on one as on the base plate 46 that supports, further, elastomeric element 48 (also can not being provided with) as spring still can be set between interior retainer plate 44 and the base plate 46, and graphite heat conducting sheet material 35 is positioned between male model 40 and the master mold 42.
Cooperate Fig. 4, Fig. 5 and with reference to figure 3, this processing method comprises the following step:
Step S02: at first, cooperate corresponding should group male and female mould 40,42 double teams and crush-cutting graphite heat conducting sheet material 35, become the graphite heat-conducting fin 30 of tool contoured external form 31 to cut graphite heat conducting sheet material 35, wherein graphite heat-conducting fin 30 has one first thickness D1.
Step S06: then, this group male and female mould 40,42 continues the graphite heat-conducting fin 30 (is the graphite heat-conducting fin 30 of further extruding after cutting with male model 40 and interior retainer plate 44 as Fig. 5) after extrusion cuts, utilization is arranged at the backform 41 of 40,42 of this group male and female moulds, the second thickness D2 that control makes this group male and female mould 40,42 that graphite heat-conducting fin 30 extremely is scheduled to from first thickness D1 extrusion, wherein the second thickness D2 is less than the first thickness D1, so graphite density is higher in the graphite heat-conducting fin 30 after the extrusion, therefore, 30 heat-conducting effect of the graphite heat-conducting fin after the extrusion are preferable.
See also Fig. 6 and Fig. 7, Fig. 6 is the flow chart that the present invention makes graphite heat-conducting fin 30 upper and lower concave, convex moulding, and Fig. 7 is the schematic diagram that the present invention cooperates the mould structure 39 of Fig. 6.Graphite heat-conducting fin 30 is for cooperating the external form as electronic components such as chips, the part 55 (its outward appearance as seen from Figure 4) that the concave, convex moulding must be arranged, as described in known, the bending place 52 that the part 55 of concave, convex moulding is produced can make graphite density more lax, and the practiced step of Fig. 6 of the present invention is in order to overcome this problem.
According to Fig. 6 is that this processing method further comprises the following step after abovementioned steps S02 cuts the graphite heat-conducting fin 30 of providing contoured external form 31:
Step S04:, make graphite heat-conducting fin 30 produce the part 55 of upper and lower concave, convex moulding with the upper and lower surperficial backfin graphite heat-conducting fin 30 of this group male and female mould 40,42 from graphite heat-conducting fin 30.
The follow-up abovementioned steps S06 that carries out continues extruding with the graphite heat-conducting fin after the backfin 30, makes graphite heat-conducting fin 30 from the second extremely predetermined thickness D2 of first thickness D1 extrusion.So, not only improve graphite density and accelerate heat transfer efficiency, more make the part graphite at graphite heat-conducting fin 30 dull and stereotyped places 54 be squeezed to bending place 52, and the graphite density that makes graphite heat-conducting fin 30 bending places 52 is similar to the graphite density of graphite heat-conducting fin 30 in the flat board place 54 of the second thickness D2, and exempts the problem of known technology bending place heat conduction obstacle.
The processing method of Fig. 6 cooperates the mould structure 39 of Fig. 7, carries out the step of described processing method.As shown in Figure 7, the interior butt plate 46 that master mold 42 inside bottom are set cooperates and male model 40 bottom concave, convex moulding.Then, utilize male model 40 and interior butt plate 46, make graphite heat-conducting fin 30 form the part 55 of upper and lower concave, convex moulding with upper and lower surperficial backfin graphite heat-conducting fin 30 from graphite heat-conducting fin 30.
In addition, see also Fig. 8 and Fig. 9, Fig. 8 is that the present invention makes heat sink 70 be intercalated in flow chart on the graphite heat-conducting fin 30, and Fig. 9 is the schematic diagram of graphite heat-conducting fin that Fig. 8 forms 30.According to shown in Figure 9, be a plurality of heat sinks 70 of intercalation in a plurality of first depressed parts 62 on graphite heat-conducting fin 30, the side that the bottom of each heat sink 70 embeds the bottom in first depressed part 62 laterally has the shape of at least one second depressed part, 64, the second depressed parts 64 can be general shown in Fig. 9 A, Fig. 9 B and Fig. 9 C.
Consult Fig. 8, after abovementioned steps S02 cut the graphite heat-conducting fin 30 of providing contoured external form 31, this processing method can also further comprise the following step:
Step S03: at first, produce at least one first depressed part 62 in the upper surface of graphite heat-conducting fin 30.
Step S05: then, the bottom of heat sink 70 is embedded in first depressed part 62, wherein the side of the bottom of heat sink 70 laterally has at least one second depressed part 64.
The follow-up abovementioned steps S06 that carries out, see through aforesaid mould structure 39, from graphite heat-conducting fin 30 tops graphite heat-conducting fin 30 is exerted pressure, graphite heat-conducting fin 30 is extruded to the second predetermined thickness D2 from the first thickness D1, except therefore graphite density improve, also can make first depressed part, 62 sides graphite heat-conducting fin 30 partly be extruded and be absorbed in second depressed part 64, so that graphite heat-conducting fin 30 firmly connects heat sink 70.Therefore, except improving heat transfer efficiency, more make heat sink 70 firmly be connected in graphite heat-conducting fin 30.
As described above it, its material can be metal material or for graphite material.If heat sink 70 is a graphite material also, see also Figure 10, Figure 10 is the flow chart that graphite material heat sink 70 of the present invention is made, before the bottom of abovementioned steps S05 heat sink 70 embedded in first depressed part 62, this processing method further comprised the following step:
Step S0L0: cooperate corresponding one group of male and female mould, 40,42 double teams and crush-cutting heat sink 70, wherein heat sink 70 has one the 3rd thickness.
Step S012: this group male and female mould 40,42 continues the heat sink 70 after extrusion cuts, utilization is arranged at the backform 41 of 40,42 of this group male and female moulds, the 4th thickness that control makes this group male and female mould 40,42 that heat sink 70 extremely is scheduled to from the extrusion of the 3rd thickness, wherein the 4th thickness is no more than the width of first depressed part 62.
Above-mentioned first depressed part 62 can be a groove or a pothole.When first depression was groove, the external form of heat sink 70 was tabular.When first depression was pothole, the external form of heat sink 70 was a column.Above-mentioned heat sink 70 can be the radiating fin that industrial circle is used to claim, in this case, the external form of heat sink 70 is not limited by this case diagram, and various external form all can.
Before the bottom of abovementioned steps S05 heat sink 70 embedded in first depressed part 62, the bottom of heat sink 70 can be coated with adhesive agent earlier, so that in more firm embedding first depressed part 62.
In addition, aforementioned technology with graphite heat-conducting fin 30 extrusions, except every graphite heat-conducting fin 30 is monolithic extruded and improve the graphite density shown in graphic as described above, also can push graphite heat-conducting fin 30 partly, the graphite heat-conducting fin 30 partly of being extruded is extruded onto the predetermined second thin thickness D2 from this first thickness D1 pressurized, and other graphite heat-conducting fin 30 partly remains in the first thicker thickness D1.
The graphite heat-conducting fin 30 of the second thin thickness is because graphite density is higher, has higher thermal conductance efficient, the graphite heat-conducting fin 30 of the first thicker thickness is because graphite density is lower, has relatively poor thermal conductance efficient, be applicable in other different application, equally also in the scope that feature of the present invention contained.
Therefore, by utilization of the present invention to lead the processing method that electronic components such as the chip that looses are produced hot graphite heat-conducting fin 30, utilize the backform 41 of 40,42 of male and female moulds, control extrusion graphite heat-conducting fin 30 is to predetermined thin thickness, can improve graphite density and significantly improves heat transfer efficiency.And, utilize the method for this extrusion, can reinforcement diminish and the problem of heat transfer efficiency variation to solve bending place 52 graphite density.In addition, also utilize the method for this extrusion, what make that heat sink 70 can be more firm is intercalated in graphite heat-conducting fin 30 surfaces.
The above detailed description of preferred embodiments is to wish to know more to describe feature of the present invention and spirit, and is not to come category of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is that hope can contain in the category of claim of being arranged in of various changes and tool equality institute of the present invention desire application.
Claims (12)
1. the processing method of a graphite heat-conducting fin, this graphite heat-conducting fin has a contoured external form, and this processing method comprises the following step:
Cooperate corresponding one group of male and female mould double team and crush-cutting one graphite heat conducting sheet material, become the graphite heat-conducting fin of this contoured external form to cut this graphite heat conducting sheet material, wherein this graphite heat-conducting fin has one first thickness; And
This group male and female mould continues the graphite heat-conducting fin after extrusion cuts, utilization is arranged on the backform of this group male and female intermode, second thickness that this group male and female mould extremely is scheduled to this graphite heat-conducting fin from this first thickness extrusion makes the graphite density of the graphite density of this second thickness greater than this first thickness.
2. processing method as claimed in claim 1 is characterized in that, after cutting the graphite heat-conducting fin of providing this contoured external form, this processing method further comprises the following step:
With this group male and female mould this graphite heat-conducting fin of upper and lower surperficial backfin, make the upper and lower concave, convex moulding of this graphite heat-conducting fin from this graphite heat-conducting fin;
Wherein, follow-up second thickness that graphite heat-conducting fin after the backfin extremely is scheduled to from this first thickness extrusion makes the graphite density of this graphite heat-conducting fin bending place be similar to the graphite density of this graphite heat-conducting fin in the flat board place of this second thickness.
3. processing method as claimed in claim 2, it is characterized in that, the bottom of this master mold more comprises butt plate in, utilize this male model with should in butt plate with this graphite heat-conducting fin of upper and lower surperficial backfin of this graphite heat-conducting fin certainly, make the upper and lower concave, convex moulding of this graphite heat-conducting fin.
4. processing method as claimed in claim 1 is characterized in that this graphite heat-conducting fin comprises a graphite linings, this graphite linings the outer thin layer that covers be to be selected from by aluminium foil, Copper Foil and gum to be formed the made thin layer of material in the group.
5. processing method as claimed in claim 1 is characterized in that, after cutting the graphite heat-conducting fin of providing this contoured external form, this processing method further comprises the following step:
Upper surface in this graphite heat-conducting fin produces at least one first depressed part; And
The bottom of one heat sink is embedded in this first depressed part, and wherein, the side of the bottom of this heat sink laterally has at least one second depressed part;
Wherein, follow-up second thickness that this graphite heat-conducting fin extremely is scheduled to from this first thickness extrusion makes the graphite heat-conducting fin of the lateral parts that is arranged in this first depressed part be absorbed in this second depressed part, makes this heat sink firmly be connected in this graphite heat-conducting fin.
6. processing method as claimed in claim 5 is characterized in that, this heat sink is a metal material.
7. processing method as claimed in claim 5 is characterized in that, this heat sink is a graphite material.
8. processing method as claimed in claim 7 is characterized in that, before the bottom of heat sink embedded in this first depressed part, this processing method further comprised the following step:
Cooperate corresponding one group of male and female mould double team and this heat sink of crush-cutting, wherein this heat sink has one the 3rd thickness; And
This group male and female mould continues the heat sink after extrusion cuts, utilization is arranged at the backform of this group male and female intermode, the 4th thickness that this group male and female mould extremely is scheduled to this heat sink from the extrusion of the 3rd thickness, wherein the 4th thickness is no more than the width of this first depressed part.
9. processing method as claimed in claim 5 is characterized in that, this first depressed part is a groove, and the external form of this heat sink is tabular.
10. processing method as claimed in claim 5 is characterized in that, this first depressed part is a pothole, and the external form of this heat sink is a column.
11. processing method as claimed in claim 5 is characterized in that, the bottom coating adhesive agent of this heat sink is to embed in this first depressed part.
12. processing method as claimed in claim 1, it is characterized in that, graphite heat-conducting fin after extrusion cuts, wherein the part of graphite heat-conducting fin is pushed, be to make the graphite heat-conducting fin of the part of being extruded be extruded onto the second predetermined thickness from this first thickness pressurized, the graphite heat-conducting fin of other parts remains in this first thickness, and wherein the graphite density of this second thickness is greater than the graphite density of this first thickness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101126596A CN101336064B (en) | 2007-06-26 | 2007-06-26 | Processing method of graphite heat-conducting fin |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101126596A CN101336064B (en) | 2007-06-26 | 2007-06-26 | Processing method of graphite heat-conducting fin |
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| CN101336064A CN101336064A (en) | 2008-12-31 |
| CN101336064B true CN101336064B (en) | 2010-04-21 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104244667A (en) * | 2013-06-13 | 2014-12-24 | 苏州沛德导热材料有限公司 | Graphite heat conduction and dissipation piece |
| CN105437641A (en) * | 2015-10-16 | 2016-03-30 | 奇华光电（昆山）股份有限公司 | Artificial graphite/copper composite radiating fin and preparation method therefor |
| CN108282984A (en) * | 2018-01-23 | 2018-07-13 | 青岛海信日立空调系统有限公司 | A kind of heat-conducting pad and air conditioner |
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| CN2405264Y (en) * | 1999-11-20 | 2000-11-08 | 富准精密工业(深圳)有限公司 | Radiator |
| US6571859B2 (en) * | 2000-08-28 | 2003-06-03 | Alcan Technology & Management Ltd. | Heat sink and process and molding tool for production of same |
| CN1798495A (en) * | 2004-12-22 | 2006-07-05 | 珍通科技股份有限公司 | Temperature equalization plate, and fabricating method |
| CN200956708Y (en) * | 2006-09-30 | 2007-10-03 | 陈世明 | Heat pipe and radiating fin compact structure |
-
2007
- 2007-06-26 CN CN2007101126596A patent/CN101336064B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2405264Y (en) * | 1999-11-20 | 2000-11-08 | 富准精密工业(深圳)有限公司 | Radiator |
| US6571859B2 (en) * | 2000-08-28 | 2003-06-03 | Alcan Technology & Management Ltd. | Heat sink and process and molding tool for production of same |
| CN1798495A (en) * | 2004-12-22 | 2006-07-05 | 珍通科技股份有限公司 | Temperature equalization plate, and fabricating method |
| CN200956708Y (en) * | 2006-09-30 | 2007-10-03 | 陈世明 | Heat pipe and radiating fin compact structure |
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