U.S. patent application number 12/821156 was filed with the patent office on 2011-12-29 for heat sink and method for manufacturing the same.
Invention is credited to Shyh-Ming Chen.
Application Number | 20110315365 12/821156 |
Document ID | / |
Family ID | 45351421 |
Filed Date | 2011-12-29 |
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United States Patent
Application |
20110315365 |
Kind Code |
A1 |
Chen; Shyh-Ming |
December 29, 2011 |
HEAT SINK AND METHOD FOR MANUFACTURING THE SAME
Abstract
A heat sink composed of a fin set and a seat and a method for
manufacturing the same are disclosed. One side of the seat is
provided with a plurality of rail rods whose cross sections are of
a hook shape. One side of the fin set is formed with a plurality of
slots corresponding to the rail rods. Thus the fin set and the seat
can be assembled by engagement of the rail rods and slots. A press
mold is employed to press the rail rods, thus the rail rods are
deformed to make the fin set and seat tightly engage with each
other.
Inventors: |
Chen; Shyh-Ming; (Taipei
County, TW) |
Family ID: |
45351421 |
Appl. No.: |
12/821156 |
Filed: |
June 23, 2010 |
Current U.S.
Class: |
165/185 ;
29/890.03 |
Current CPC
Class: |
B21D 53/085 20130101;
F28F 2275/14 20130101; F28D 2021/0029 20130101; H01L 23/3672
20130101; H01L 23/467 20130101; H01L 21/4882 20130101; H01L
2924/0002 20130101; H01L 2924/00 20130101; Y10T 29/4935 20150115;
H01L 2924/0002 20130101; F28F 1/12 20130101; F28D 15/0275 20130101;
F28F 3/06 20130101; H01L 23/427 20130101; B21K 25/00 20130101 |
Class at
Publication: |
165/185 ;
29/890.03 |
International
Class: |
F28F 7/00 20060101
F28F007/00; B21D 53/02 20060101 B21D053/02 |
Claims
1. A heat sink comprising: a seat, being provided with a plurality
of parallel rail rods on one side thereof, wherein a cross section
of each of the rail rods is of a hook shape; and a fin set, being
formed with a plurality of slots corresponding to the rail rods;
wherein the rail rods are separately accommodated in the slots, and
the seat and the fin set are tightly assembled together by
deformation of the rail rods.
2. The heat sink of claim 1, wherein the cross section of each of
the rail rods is T-shaped and the slots are the same in shape.
3. The heat sink of claim 1, wherein the cross section of each of
the rail rods is inverted-L-shaped and the slots are the same in
shape.
4. The heat sink of claim 1, wherein the cross section of each of
the rail rods is of a T-shape with an indent at a center of a
horizontal bar thereof and the slots are T-shaped.
5. The heat sink of claim 1, wherein the cross section of each of
the rail rods is Y-shaped and the slots are T-shaped.
6. The heat sink of claim 1, wherein the seat is a cuboid and the
fin set has a hollow for accommodating the seat.
7. The heat sink of claim 6, wherein sides of the seat are provided
with a plurality of rail rods and the fin set is provided with
corresponding slots.
8. The heat sink of claim 6, wherein the cross section of each of
the rail rods is T-shaped and the slots are the same in shape.
9. The heat sink of claim 7, wherein the cross section of each of
the rail rods is T-shaped and the slots are the same in shape.
10. The heat sink of claim 6, wherein the cuboidal seat is
hollow.
11. A method for manufacturing a heat sink, comprising the steps
of: a) providing a seat, wherein the seat is provided with a
plurality of parallel rail rods on one side thereof, and a cross
section of each of the rail rods is of a hook shape; and b)
providing a fin set, wherein the fin set is formed with a plurality
of slots corresponding to the rail rods; c) embedding the rail rods
into the slots; and d) pressing the rail rods to be deformed, so
that the seat and the fin set are tightly assembled together.
12. The method of claim 11, wherein the cross section of each of
the rail rods is T-shaped and the slots are the same in shape.
13. The method of claim 11, wherein the cross section of each of
the rail rods is inversed-L-shaped and the slots are the same in
shape.
14. The method of claim 11, wherein the cross section of each of
the rail rods is of a T-shape with an indent at a center of a
horizontal bar thereof and the slots are T-shape.
15. The method of claim 11, wherein the cross section of each of
the rail rods is Y-shaped and the slots are T-shaped.
16. The method of claim 11, wherein the seat is a cuboid and the
fin set has a hollow for accommodating the seat.
17. The method of claim 16, wherein sides of the seat are provided
with a plurality of rail rods and the fin set is provided with
corresponding slots.
18. The method of claim 16, wherein the cross section of each of
the rail rods is T-shaped and the slots are the same in shape.
19. The method of claim 17, wherein the cross section of each of
the rail rods is T-shaped and the slots are the same in shape.
20. The method of claim 16, wherein the cuboidal seat is hollow.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Technical Field
[0002] The invention generally relates to heat sinks, particularly
to assembling of fins and a seat.
[0003] 2. Related Art
[0004] An ordinary aluminum heat sink is composed of fins and a
seat, which are separately formed and then assembled together. And
great thermal conductivity must be formed between the fins and
seat. FIGS. 1A and 1B show a typical assembling method of fins and
seat. One side of the seat 1 is cut by a scraping cutter to form a
plurality of parallel deep slots 11 and shallow slots 12, which are
alternately arranged. The fins 2 are separately embedded in the
deep slots 11. Then a press mold 3 like a knife is inserted into a
gap between two fins 2 to press the shallow slots 12. The shallow
slots 12 are deformed outwards to tightly nip the fins 2. Thus the
fins and seat can be tightly assembled together.
[0005] However, there is a serious drawback in the above method.
Both the scraper cutter for cutting the slots 11, 12 and the press
mold 3 for pressing the shallow slots 12 must be very sharp. Their
knives tend to be blunt, cracked or misshapen, so they must be
often maintained and replaced. Not only will the production cost
increase but also the replacement operation must interrupt the
production process. Therefore, it is very uneconomical to the
manufactures.
SUMMARY OF THE INVENTION
[0006] An object of the invention is to reduce production cost and
to shorten tact time by not employing scraper cutter and
knife-shaped press mold.
[0007] To accomplish the above object, the invention provides a
heat sink and a method for manufacturing the same. The heat sink is
composed of a fin set and a seat. One side of the seat is provided
with a plurality of rail rods whose cross sections are of a hook
shape. One side of the fin set is formed with a plurality of slots
corresponding to the rail rods. Thus the fin set and the seat can
be assembled by engagement of the rail rods and slots. A press mold
is employed to press the rail rods, thus the rail rods are deformed
to make the fin set and seat tightly engage with each other.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIGS. 1A and 1B show a conventional method for manufacturing
a heat sink;
[0009] FIG. 2 is an exploded perspective view of the first
embodiment of the invention;
[0010] FIG. 3 is an assembled perspective view of the first
embodiment of the invention;
[0011] FIG. 4 is a cross sectional view of the first embodiment of
the invention;
[0012] FIGS. 5A and 5B show a comparison of the first embodiment
before and after pressing;
[0013] FIG. 6 is a cross sectional view of the first embodiment
after pressing;
[0014] FIGS. 7A and 7B show a comparison of the second embodiment
before and after pressing;
[0015] FIGS. 8A and 8B show a comparison of the third embodiment
before and after pressing;
[0016] FIGS. 9A and 9B show a comparison of the fourth embodiment
before and after pressing;
[0017] FIGS. 10A and 10B show a comparison of the fifth embodiment
before and after pressing;
[0018] FIGS. 11A and 11B show a comparison of the sixth embodiment
before and after pressing;
[0019] FIG. 12 is an exploded view of the seventh embodiment of the
invention; and
[0020] FIG. 13 is an exploded view of the eighth embodiment of the
invention
DETAILED DESCRIPTION OF THE INVENTION
[0021] FIG. 2 shows an exploded view of the first embodiment of the
invention. The heat sink of the invention is composed of a seat 4
and a fin set 5. If needed, one or more heat pipes 6 additionally
disposed to connect the seat 4 to the fin set 5. One side of the
seat 4 to be connected with the fin set 5 is provided with a
plurality of parallel rail rods 41 whose cross sections are of a
hook shape. In the shown embodiment, the cross section of the rail
rod 41 is of a T shape. The fin set 5 is composed of a plurality of
fins stacking up with each other. The bottom of the fin set 5 is
formed with a plurality of slots 51 corresponding to the rail rods
41. The seat 4 and fin set 5 can be assembled together by embedding
the rail rods 41 into the slots 51. Additionally, the seat 4 and
fin set 5 may be separately provided with semicircular troughs 42,
52. A pair of semicircular troughs 42, 52 may form a circular
trough for accommodating a heat pipe 6.
[0022] FIGS. 3 and 4 are an assembled perspective view and cross
sectional view of the first embodiment of the invention,
respectively. By engaging of the T-shaped rail rods 41 and slots
51, the seat 4 and fin set 5 has been connected but not tightly
assembled yet. Next, as can be seen in FIG. 5A, a press mold 7 is
embedded into a gap between two adjacent fins of the fin set 5 to
press the rail rods 41. The press mold 7 has a specific outline for
pressing two opposite ends of the T-shaped rail rods 41. The rail
rods 41 are thus deformed by this pressing, and the fin set 5 is
also deformed. As a result, the seat 4 and fin set 5 are tightly
assembled together as shown in FIGS. 5B and 6.
[0023] The shape of the rail rod 41 is not limit to the T shape as
abovementioned. Any other shapes which can perform a hooking effect
are available. As shown in FIGS. 7A and 7B, the rail rods 41a have
a cross section of an inverted-L shape. Of course, shape of the
press mold 7a must be modified correspondingly, so that it can
press a distal end of the inverted-L-shaped rail rods 41a. Thus the
rail rods 41a are deformed to make the fin set 5a and seat 4a
tightly assembled together. FIGS. 8A and 8B show a T-shaped rail
rod 41b with an indent on the center of the horizontal bar. Also,
shape of the press mold 7b must be modified correspondingly, so
that it can press the horizontal bar of the T-shaped rail rods 41b.
Thus the rail rods 41b are deformed to make the fin set 5b and seat
4b tightly assembled together. FIGS. 9A and 9B show a rectangular
rail rod 41c with a groove 411c on the top thereof. Also, shape of
the press mold 7c must be modified correspondingly, so that it can
press the groove 411c of the rail rods 41c. Two side walls of the
groove 411c are toppled into a V shape. Thus the rail rods 41c are
deformed to make the fin set 5c and seat 4c tightly assembled
together. FIGS. 10A and 10B show a T-shaped rail rod 41 the same as
the first embodiment abovementioned, but the press mold 7d is
different in shape, so that it can equally press the horizontal bar
of the T-shaped rail rods 41 to make the vertical bar thereof
deformed. Thus the rail rods 41 are deformed to make the fin set 5
and seat 4 tightly assembled together. FIGS. 11A and 11B show a
hollow fin set 5e and a cuboidal seat 4e penetrating the fin set
5e. Four sides of the cuboidal seat 4e are separately provided with
four T-shaped rail rods 41e and four corresponding slots 51e are
formed inside the fin set 5e. The rail rods 41e are pressed by a
press mold to be deformed. Thus the fin set 5e and seat 4e are
tightly assembled together. FIG. 12 shows a hollowly cuboidal seat
4e' similar to the embodiment shown in FIG. 11. The hollow seat 4e'
may add an air passage. Apart from this, anything else is the same.
FIG. 13 shows a substantially cylindrical seat 4f and a floral fin
set 5f with a slot 51f corresponding to the seat 4f.
[0024] It will be appreciated by persons skilled in the art that
the above embodiments have been described by way of example only
and not in any limitative sense, and that various alterations and
modifications are possible without departure from the scope of the
invention as defined by the appended claims.
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