U.S. patent application number 13/610467 was filed with the patent office on 2014-02-06 for heat sink structure and manufacturing method thereof.
This patent application is currently assigned to ASIA VITAL COMPONENTS CO., LTD.. The applicant listed for this patent is Kuo-Sheng Lin, Sheng-Huang Lin. Invention is credited to Kuo-Sheng Lin, Sheng-Huang Lin.
Application Number | 20140034279 13/610467 |
Document ID | / |
Family ID | 50024327 |
Filed Date | 2014-02-06 |
United States Patent
Application |
20140034279 |
Kind Code |
A1 |
Lin; Sheng-Huang ; et
al. |
February 6, 2014 |
HEAT SINK STRUCTURE AND MANUFACTURING METHOD THEREOF
Abstract
A heat sink structure and a manufacturing method thereof. The
heat sink includes a main body and multiple radiating fins each
having a folded root section. The main body has multiple connection
channels formed on a circumference of the main body. The multiple
radiating fins are placed in a mold. A mechanical processing
measure is used to high-speed impact the main body so as to thrust
the main body into the mold. Accordingly, the folded root sections
of the radiating fins are relatively high-speed thrust into the
connection channels of the main body to tightly integrally connect
with the main body.
Inventors: |
Lin; Sheng-Huang; (New
Taipei City, TW) ; Lin; Kuo-Sheng; (New Taipei City,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Lin; Sheng-Huang
Lin; Kuo-Sheng |
New Taipei City
New Taipei City |
|
TW
TW |
|
|
Assignee: |
ASIA VITAL COMPONENTS CO.,
LTD.
New Taipei City
TW
|
Family ID: |
50024327 |
Appl. No.: |
13/610467 |
Filed: |
September 11, 2012 |
Current U.S.
Class: |
165/185 ;
29/890.046 |
Current CPC
Class: |
B23P 19/10 20130101;
Y10T 29/49378 20150115; B23P 15/26 20130101; B23P 19/027 20130101;
F28F 7/00 20130101; B21D 39/038 20130101; B23P 2700/10 20130101;
F28D 2021/0029 20130101; F21V 29/77 20150115; H01L 21/4882
20130101; B21D 53/02 20130101; B21K 25/00 20130101; B23P 11/02
20130101 |
Class at
Publication: |
165/185 ;
29/890.046 |
International
Class: |
F28F 7/00 20060101
F28F007/00; B23P 15/26 20060101 B23P015/26 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 1, 2012 |
TW |
101127730 |
Claims
1. A heat sink structure comprising: a main body having a first end
and a second end, the first and second ends defining an axial
direction, multiple connection channels being formed on a
circumference of the main body; and multiple radiating fins
connected to the circumference of the main body, each first
radiating fin having an end formed with at least one folded root
section corresponding to the connection channel, the folded root
section having a certain form, a mechanical processing measure
being used to high-speed impact the main body toward the radiating
fins, wherein the folded root sections of the radiating fins are
high-speed thrust into the connection channels from the first end
to the second end of the main body in the axial direction to
tightly integrally connect with the main body.
2. The heat sink structure as claimed in claim 1, wherein the end
of the radiating fin is folded back onto itself, bent or waved to
form the folded root section.
3. The heat sink structure as claimed in claim 1, wherein the end
of the radiating fin is directly folded back onto itself to form
the folded root section.
4. The heat sink structure as claimed in claim 1, wherein the
folded root section is L-shaped, triangular, reverse T-shaped,
curled or water drop-shaped.
5. The heat sink structure as claimed in claim 1, wherein the
folded root section of the radiating fin has a thickness slightly
larger than a width of the connection channel.
6. The heat sink structure as claimed in claim 1, wherein each
connection channel is formed with a planar surface or a
raised/recessed non-planar surface.
7. The heat sink structure as claimed in claim 1, wherein the
connection channels are radially distributed over the circumference
of the main body and the connection channels are normal to the
surface of the main body or inclined to the surface of the main
body by a certain angle.
8. The heat sink structure as claimed in claim 1, wherein the
radiating fin is straight without bending or is formed with at
least one bending angle.
9. The heat sink structure as claimed in claim 1, wherein the main
body is formed with multiple thrust spaces in communication with
the connection channels.
10. A manufacturing method of a heat sink, comprising steps of:
providing a mold, the mold having an inner circumference, an upper
surface and multiple splits, the inner circumference defining an
internal space, the multiple splits being radially formed around
the internal space in communication with the internal space and
downward extending from the upper surface; providing multiple
radiating fins, the radiating fins being placed in the splits, one
radiating fin being placed in each split, an end of each radiating
fin being preformed with a folded root section with a certain
shape, the folded root sections protruding from the inner
circumference of the mold; providing a main body, the main body
having a first end and a second end, the first and second ends of
the main body defining an axial direction, multiple connection
channels being preformed on a circumference of the main body
between the first and second ends, the first end of the main body
being aimed at the internal space; and using a mechanical
processing measure to high-speed impact the main body so as to
thrust the main body into the internal space and move the main body
relative to the multiple radiating fins, whereby the folded root
sections of the radiating fins are high-speed thrust into the
connection channels and moved in the axial direction to the second
end to quickly tightly integrally connect with the main body.
11. The manufacturing method of the heat sink as claimed in claim
10, wherein the main body is temporarily positioned above the mold
and the mechanical processing measure is an air compression
apparatus for creating compressed air to thrust the main body into
the internal space.
12. The manufacturing method of the heat sink as claimed in claim
11, wherein a central body is disposed in the internal space in
alignment with the main body.
Description
[0001] This application claims the priority benefit of Taiwan
patent application number 101127730 filed on Aug. 1, 2012.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates generally to an improved heat
sink structure and a manufacturing method thereof, and more
particularly to an annular heat sink structure and a manufacturing
method thereof.
[0004] 2. Description of the Related Art
[0005] The conventional cylindrical heat sink includes a
cylindrical body and multiple radiating fins connected to the
circumference of the cylindrical body. There are several
conventional measures for connecting the radiating fins to the
circumference of the cylindrical body. For example, Taiwanese
Invention Patent Application No. 098105429 discloses a cylindrical
heat sink and a method of tightly planting radiating fins of the
heat sink and an application device thereof. According to the
method, a mold seat drivable by a power source to create stepped
rotational operation is provided. A cylindrical body is located on
the mold seat. The circumference of the cylindrical body is formed
with multiple channels. A radiating fin assembly is provided. The
radiating fin assembly includes multiple radiating fins arranged on
a lateral side of the mold seat. The cylindrical body
intermittently rotates to drive and align the channels with the
radiating fins. A radiating fin insertion device is used to push
the radiating fins and sequentially insert and locate the radiating
fins into the channels of the cylindrical body. After the radiating
fins are fully inserted in the channels of the cylindrical body, a
successive tightening process is performed to tightly integrally
connect the radiating fins to the channels. Accordingly, the
radiating fins are located on the circumference of the cylindrical
body to form a heat sink.
[0006] One prior art discloses a tightening method for a heat sink.
The heat sink includes a heat conduction base seat and a radiating
fin assembly. One surface of the base seat is formed with multiple
channels and guide grooves positioned between two channels. The
radiating fin assembly includes multiple radiating fins. A mold
having an internal space and a press end section is provided. A
tightening/connection process is performed to press and insert the
heat sink into the internal space of the mold. The press end
section is axially thrust into the guide grooves to compress and
deform the channels. At this time, the radiating fins are pressed
to tightly integrally connect with the deformed channels. The above
patent provides a heat sink pressing and riveting method better
than the conventional heat sink manufacturing method. The breakage
of the puncher or blade mold can be effectively reduced to promote
the ratio of good products. Also, the precision and quality of the
products are increased. This method is conveniently applicable to
various heat sinks to form different types or shapes of heat
sinks.
[0007] Another prior art discloses an improved assembly of heat
sink radiating fins and base seat. The end of the radiating fin of
the heat sink is formed with a folded root section with a
predetermined shape. Multiple radiating fins are assembled into a
radiating fin assembly by means of side latches or heat pipes. The
connection face of the base seat is formed with insertion channels
in adaptation to the radiating fins by means of an extrusion mold.
The connection face of the base seat is further formed with
elongated grooves. The insertion channels and the elongated grooves
are alternately arranged.
[0008] The folded root sections of the radiating fins of the
radiating fin assembly are simultaneously inserted into the
insertion channels of the base seat. Then the elongated grooves are
pressed to make the base seat very tightly riveted with the folded
root sections of the radiating fins. By means of the design of the
folded root sections, the contact area between the radiating fins
and the base seat is greatly increased to effectively enhance heat
transfer efficiency of the heat sink. Moreover, the insertion
process is simple and time-saving and the radiating fins can be
securely connected with the base seat by means of the insertion
process. Furthermore, the assembling process can be completed
without using electroplating, solder paste or any other media
adhesive. This helps in maintaining the environment.
[0009] The other prior art discloses an improved heat sink with
heat pipes. The heat sink includes a thermal module, a base seat
and more than one heat pipe. The end of each radiating fin is
formed with a folded root section. An upper end face of the base
seat is formed with multiple insertion channels by means of an
extrusion mold. The folded root sections of the radiating fins are
inserted into the insertion channels of the base seat and tightly
riveted with the base seat. More than one insertion groove is
formed on a lower end face of the base seat. The heat pipe is
correspondingly placed into the insertion groove and then pressed
and flattened to tightly connect with the base seat by means of
press fit. Accordingly, the bottom face of the heat pipe is formed
with a flat section flush with the lower end face of the base seat.
The flat section of the heat pipe attaches to and contacts with a
heat-generating chip. Therefore, the heat can be directly
transferred by the heat pipe and quickly dissipated.
[0010] In all the above patents, the radiating fin is first riveted
with the channel and then the guide grooves on two sides of the
channel are pressed to deform the channel and press the radiating
fin to tightly integrally connect the radiating fin with the
channel.
[0011] Such process has some problems as follows:
[0012] 1. The riveting process is a pressing process in which a
mechanical measure is used to connect two components into an
integrated body. The radiating fin is connected with the channel by
means of riveting so that the junction between the radiating fin
and the channel is deformed. As a result, the junction between the
radiating fin and the channel is irregular and gaps exist between
the radiating fin and the channel. This will affect the heat
transfer efficiency.
[0013] 2. The outer surface of the cylindrical body not only is
formed with the channels, but also is formed with the guide
grooves. The channels and the guide grooves are alternately
arranged. That is, the number of the channels per unit surface area
is reduced. As a result, the number of the mounted radiating fins
is reduced.
[0014] 3. The guide grooves on two sides of the channel are pressed
to deform the channel and press the radiating fin to tightly
integrally connect the radiating fin with the channel. This is
likely to make the edges of the opening of the channel outward curl
and warp. Therefore, the opening of the channel will be expanded.
As a result, the radiating fin is apt to detach from the
channel.
[0015] 4. The manufacturing method includes numerous steps so that
the manufacturing time is quite long.
SUMMARY OF THE INVENTION
[0016] It is therefore a primary object of the present invention to
provide a heat sink structure and a manufacturing method thereof.
The heat sink includes a main body and multiple radiating fins each
having at least one folded root section. The main body is formed
with multiple connection channels. By means of a mechanical
processing measure, the folded root sections of the radiating fins
are relatively high-speed thrust into the connection channels of
the main body to tightly integrally connect with the main body to
form the heat sink by means of press fit. Therefore, it is
unnecessary to further press the junction between the main body and
the radiating fins.
[0017] It is a further object of the present invention to provide
the above heat sink structure, in which the junction between the
main body and the radiating fins is formed with a raised/recessed
non-planar surface to enhance connection friction.
[0018] It is still a further object of the present invention to
provide the above heat sink structure and the manufacturing method
thereof, in which the number of the radiating fins per unit surface
area is increased.
[0019] It is still a further object of the present invention to
provide the above heat sink structure and the manufacturing method
thereof, in which the heat sink structure has better heat
dissipation efficiency.
[0020] To achieve the above and other objects, the heat sink
structure of the present invention includes: a main body having a
first end and a second end, the first and second ends defining an
axial direction, multiple connection channels being formed on a
circumference of the main body; and multiple radiating fins
connected to the circumference of the main body, each first
radiating fin having an end formed with at least one folded root
section corresponding to the connection channel, the folded root
section having a certain form, a mechanical processing measure
being used to high-speed impact the main body toward the radiating
fins, whereby the folded root sections of the radiating fins are
high-speed thrust into the connection channels from the first end
to the second end of the main body in the axial direction to
tightly integrally connect with the main body.
[0021] In the above heat sink structure, the end of the radiating
fin is folded back onto itself, bent or waved to form the folded
root section.
[0022] In the above heat sink structure, the end of the radiating
fin is directly folded back onto itself to form the folded root
section.
[0023] In the above heat sink structure, the folded root section is
L-shaped, triangular, reverse T-shaped, curled or water
drop-shaped.
[0024] In the above heat sink structure, the folded root section of
the radiating fin has a thickness slightly larger than a width of
the connection channel.
[0025] In the above heat sink structure, each connection channel is
formed with a raised/recessed non-planar surface.
[0026] In the above heat sink structure, the connection channels
are radially distributed over the circumference of the main body
and the connection channels are normal to the surface of the main
body or inclined to the surface of the main body by a certain
angle.
[0027] In the above heat sink structure, the radiating fin is
straight without bending or is formed with at least one bending
angle.
[0028] The manufacturing method of the heat sink of the present
invention includes steps of: providing a mold, the mold having an
inner circumference, an upper surface and multiple splits, the
inner circumference defining an internal space, the multiple splits
being radially formed around the internal space in communication
with the internal space and downward extending from the upper
surface; providing multiple radiating fins, the radiating fins
being placed in the splits, one radiating fin being placed in each
split, an end of each radiating fin being preformed with a folded
root section with a certain shape, the folded root sections
protruding from the inner circumference of the mold; providing a
main body, the main body having a first end and a second end, the
first and second ends of the main body defining an axial direction,
multiple connection channels being preformed on a circumference of
the main body between the first and second ends, the first end of
the main body being aimed at the internal space; and using a
mechanical processing measure to high-speed impact the main body so
as to thrust the main body into the internal space and move the
main body relative to the multiple radiating fins, whereby the
folded root sections of the radiating fins are high-speed thrust
into the connection channels and moved in the axial direction to
the second end to quickly tightly integrally connect with the main
body.
[0029] In the above manufacturing method of the heat sink, the main
body is temporarily positioned above the mold and the mechanical
processing measure is an air compression apparatus for creating
compressed air to thrust the main body into the internal space. A
central body is disposed in the internal space in alignment with
the main body.
BRIEF DESCRIPTION OF THE DRAWINGS
[0030] The structure and the technical means adopted by the present
invention to achieve the above and other objects can be best
understood by referring to the following detailed description of
the preferred embodiments and the accompanying drawings,
wherein:
[0031] FIG. 1 is a perspective exploded view of the present
invention;
[0032] FIG. 2 is a perspective assembled view of the present
invention;
[0033] FIG. 3A is a top view of the main body of the present
invention;
[0034] FIG. 3B is a perspective view of the main body of the
present invention;
[0035] FIG. 3C is a top view of the radiating fin of the present
invention;
[0036] FIG. 3D is a perspective view of the radiating fin of the
present invention;
[0037] FIG. 4A is a view showing the folded root section of the
radiating fin of the present invention in one aspect;
[0038] FIG. 4B is a view showing the folded root section of the
radiating fin of the present invention in another aspect;
[0039] FIG. 4C is a view showing the folded root section of the
radiating fin of the present invention in still another aspect;
[0040] FIG. 4D is a view showing the folded root section of the
radiating fin of the present invention in still another aspect;
[0041] FIG. 4E is a view showing the folded root section of the
radiating fin of the present invention in still another aspect;
[0042] FIG. 5 is a view showing that the connection channel of the
main body of the present invention is formed with raised/recessed
non-planar surface;
[0043] FIG. 6A is a view showing that the folded root section is
connected to the connection channel in a first state;
[0044] FIG. 6B is a view showing that the folded root section is
connected to the connection channel in a second state;
[0045] FIG. 6C is a view showing that the folded root section is
connected to the connection channel in the first state, in which
the radiating fin has a bending angle;
[0046] FIG. 6D is a view showing that the folded root section is
connected to the connection channel in the second state, in which
the radiating fin has a bending angle;
[0047] FIG. 7 is a flow chart of the manufacturing method of the
present invention;
[0048] FIG. 8 shows a first step of the manufacturing method of the
present invention;
[0049] FIG. 9A shows a second step of the manufacturing method of
the present invention; and
[0050] FIG. 9B shows a third step of the manufacturing method of
the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0051] Please refer to FIGS. 1 and 2. FIG. 1 is a perspective
exploded view of the present invention. FIG. 2 is a perspective
assembled view of the present invention. The heat sink 10 of the
present invention includes a main body 12 and multiple radiating
fins 13 connected to an outer circumference of the main body
12.
[0052] As shown in FIGS. 3A and 3B, the main body has a first end
121 and a second end 122. The first and second ends 121, 122 of the
main body 12 define an axial direction. Multiple connection
channels 123 are formed on the outer circumference of the main body
12 and extend from the first end 121 to the second end 122. The
connection channels 123 are adapted to the radiating fins 13 (as
shown in FIG. 2). The connection channels 123 are preformed on the
outer circumference of the main body 12 by means of an extrusion
mold or removing material (such as milling) or casting or
multi-piece fit. Each connection channel 123 communicates with a
thrust space 124. The thrust space 124 is formed on the outer
circumference of the main body 12 near the first end 121.
[0053] Referring to FIGS. 3A and 3B, the connection channel 123 has
a width f1 and the thrust space 124 has a width f2 larger than the
width f1 of the connection channel 123. Accordingly, when the main
body 12 is connected to the multiple radiating fins 13, the
radiating fins 13 are easy to fit into the first end 121 of the
main body 12 (as shown in FIG. 1).
[0054] As shown in FIGS. 3C and 3D, the radiating fins 13 are
annularly arranged at intervals. Each radiating fin 13 has an end
formed with at least one folded root section 131 corresponding to
the connection channel 123 (as shown in FIG. 3A).
[0055] The folded root section 131 is formed with a thickness f3 by
means of back folding or bending (as shown in FIG. 3C). The
thickness f3 is slightly larger than the width f1 of the connection
channel 123 (as shown in FIG. 3A). Therefore, the folded root
section 131 can be thrust into the connection channel 123 from the
first end 121 to the second end 122 of the main body 12 in the
axial direction a and tightly integrally connected to the
connection channel 123 by means of press fit (as shown in FIG.
1).
[0056] The folded root section 13 of the radiating fin 13 can be in
various forms as described hereinafter.
[0057] The form of the folded root section 131 of the end of the
radiating fin 13 is variable. For example, as shown in FIG. 4A, the
end of the radiating fin 13 is directly folded back onto itself to
form the folded root section 131. Alternatively, as shown in FIG.
4B, the end of the radiating fin 13 is directly folded back onto
itself and then bent to form an L-shaped folded root section 131b.
Still alternatively, as shown in FIG. 4C, the end of the radiating
fin 13 is directly folded back onto itself and then pressed to form
a triangular folded root section 131c. Still alternatively, as
shown in FIG. 4D, the end of the radiating fin 13 is directly
folded back onto itself and then pressed to form a reverse T-shaped
folded root section 131d. Still alternatively, as shown in FIG. 4E,
the end of the radiating fin 13 is directly folded back onto itself
and then curled to form a curled folded root section 131e. Still
alternatively, the folded root section can have the form of a water
drop or a waved form or an overlapping form.
[0058] The connection channel 123 of the main body 12 and the
radiating fin 13 can be in various forms as described
hereinafter.
[0059] Further referring to FIG. 3A, each connection channel 123
has, but not limited to, a straight surface. Alternatively, as
shown in FIG. 5, each connection channel 123a has a raised/recessed
non-planar surface 1231a to enhance the connection friction between
the connection channel and the folded root section and avoid
detachment of the radiating fin.
[0060] As shown in FIG. 6A, the connection channels 123 are
radially distributed over the circumference of the main body 12.
The connection channels 123 are normal to the surface of the main
body 12. The radiating fin 13 is straight from the folded root
section 131 to an outer free end without bending. Alternatively, as
shown in FIG. 6B, the connection channels 123b are connection
channels radially distributed over the circumference of the main
body 12. The connection channels 123b are inclined to the surface
of the main body 12. The radiating fin 13 is straight from the
folded root section 131 to an outer free end without bending.
[0061] As shown in FIG. 6C and 6D, alternatively, the radiating fin
13 of FIGS. 6A and 6B is formed with a bending angle 134. In the
case that the heat sink is used in cooperation with a cooling fan,
the fluid passing through the cooling fan is easy to go into the
flow ways between the first radiating fins 13 and then quickly flow
out to carry away the heat.
[0062] Please further refer to FIGS. 7, 8, 9A and 9B. FIG. 7 is a
flow chart of the manufacturing method of the present invention.
The manufacturing method of the present invention includes steps
of:
[0063] Step 61: providing a mold 40 as shown in FIG. 8, the mold 40
having an inner circumference 41, an upper surface 42 and multiple
splits 43, the inner circumference 41 defining an internal space 44
in which a central body 45 is disposed, the multiple splits 43
being radially formed around the internal space 44 in communication
with the internal space 44 and downward extending from the upper
surface 42;
[0064] Step 62: providing the multiple radiating fins 13 as shown
in FIGS. 8 and 9A, the radiating fins 13 being placed into the
splits 43 with the folded root sections 131 protruding from the
inner circumference 41 of the mold 40;
[0065] Step 63: providing the main body 12 as shown in FIGS. 8 and
9A, the first end 121 of the main body 12 being aimed at the
central body 45 disposed in the internal space 44 of the mold 40,
the main body 12 being temporarily positioned above the mold 40
with the first end 121 of the main body 12 aimed at the central
body 45, the thrust section 124 and the connection channel 123
being aligned with the folded root section 131 of each radiating
fin 13; and
[0066] Step 64: using a mechanical processing measure to high-speed
impact the main body 12 as shown in FIGS. 8, 9A and 9B to thrust
the main body 12 toward the central body 45 into the internal space
44 and move the main body 12 relative to the multiple radiating
fins 13, at this time, the folded root sections 131 of the
radiating fins 13 being thrust from the thrust sections 124 of the
first end 121 of the main body 12 into the connection channels 123
and moved in the axial direction a to the second end 122 to quickly
tightly integrally connect with the main body 12.
[0067] In step 64, the mechanical processing measure is an air
compression apparatus 50, which serves as a power source for
creating compressed air. In the instant of relieving the compressed
air, a power is generated to push and drive the main body 12 to
thrust into the internal space 44 at high speed. In the meantime,
the thrust sections 124 and the connection channels 123 are thrust
onto the folded root sections 131 from upper side of the mold 40 at
high speed. Accordingly, the main body 12 is integrally connected
with the radiating fins 13 to form a heat sink 10 (as shown in FIG.
2). The central body 45 serves to ensure that the main body 12 can
be downward thrust into the internal space 44 in correct position
along the central body 45. The air compression apparatus 50 is, but
not limited to, an air compressor.
[0068] Referring to FIG. 2, after step 64 is completed; the heat
sink 10 is taken out from the mold 40.
[0069] In the above embodiments, the main body 12 is a hollow body.
Alternatively, in another embodiment, the main body 12 can be a
solid body. In the case that the main body 12 is a solid body, no
central body is disposed in the internal space 44 of the mold
40.
[0070] The present invention has been described with the above
embodiments thereof and it is understood that many changes and
modifications in the above embodiments can be carried out without
departing from the scope and the spirit of the invention that is
intended to be limited only by the appended claims.
* * * * *