This application is based upon and claims the benefit of priority from the prior China Patent Application No. 201110433443.6, filed on Dec. 22, 2011, the entire contents of which are incorporated herein by reference.
(a) Field of the Invention
The present invention relates to a heat sink and a method for making the same by substantially providing a sub extruded body whose top is ripped to form several separate sets of holding members that are symmetrically arranged; when the holding members are punched, they deform for firmly holding a fin set; the present invention conduces to a rapid combination of a radiating seat and the fin set.
(b) Description of the Prior Art
A conventional aluminum (copper) extruded heat sink comprises a radiating seat and a fin set that are integrally structured. This heat sink provides a concise structure. However, the radiating seat is thick, which thence consumes more materials to manufacture. The conventional heat sink is accordingly bulky and incurs high manufacturing costs. In addition, a distance between each fin unit of the fin set is quite large, so that the number of the fin units is unsatisfactory for efficiently dispersing heat.
There is another heat sink that is provided with a plurality of slots on a radiating seat. Whereby, the slots are provided for accommodating each fin unit of a fin set. Alternatively, a heat source contact side disposed at a lower end of the radiating seat could be provided with at least one heating tube, and the heating tube thence exposes its one plane for directly contacting a heat source (CPU). Thereby, the heat sink absorbs and disperses heat efficiently.
It is therefore the purpose of this invention to provide a heat sink and a method for making the same so as to solve problems existing in the conventional heat sinks that the distance between each fin unit of the fin set is too wide and the fin units are so scarce that the heat dispersing efficiency is limited.
The present invention is achieved as follows:
A heat sink comprises a radiating seat and a fin set. A plurality of sets of holding members are arranged on an upper end of the radiating seat at intervals, and an interval between any two sets of the holding members is defined for receiving insertion of the fin set. Each fin unit of the fin set includes bent flakes with gaps formed at a bottom end thereof. The gaps are arranged corresponding to the holding members for justly receiving the holding members, respectively. Each fin unit of the fin set is inserted into the intervals that are adjacently defined between any two sets of the holding members on the radiating seat orderly. Each of the holding members are deformed by a punching of a punching mold, so that the holding member downwardly hold at least one side of each of the gaps of the bent flakes.
A method for making a heat sink comprises procedures of drawing-extrusion, cutting, ripping, inserting, and punching to complete a combination of a radiating seat and a fin set.
Drawing-extrusion: shape aluminum or copper metal into a long extruded body with a plate shape by a drawing-extrusion forming method, and form at least one set of elongated strips at an upper end thereof.
Cutting: cut the extruded body into separate sub rippled bodies, thereby inviting each sub extruded body to serve as a model for manufacturing the radiating seat. Ripping: rip the elongated strips on the sub extruded body to present intervals on the elongated strips and form one radiating seat. Form a plurality of separate sets of holding members on the elongated strips after ripping for receiving an insertion of the fin set into the intervals that are adjacently defined between any two sets of the holding members.
Inserting: insert each fin unit of the fin set within the intervals that are adjacently defined between any two sets of the holding members orderly; form bent flakes with gaps at a bottom end of each fin unit of the fin set in advance; thereby matching the gaps between the bent flakes with the holding members in time of inserting the fin set to the radiating seat.
Punching: utilize a plurality of punching molds that are suited to the fin set; insert the punching molds into vacant spaces within each fin unit of the fin set, respectively; arrange a punching bulge on each of the punching molds corresponding to the holding members, respectively; punch each of the holding members by the punching bulges of the punching molds for downwardly deforming the holding members, so that the holding members are able to hold at least one side of each of the gaps between the bent flakes on the fin set, thereby contributing to a combination of the radiating seat and the fin set.
Advantages and effects of the present invention are as follows:
1. When the bent flakes with the gaps are disposed at the bottom end of each fin unit of the fin set, the holding members of the radiating seat are deformed by the punching of the punching mold so as to firmly hold at least one side of each of the gaps of the bent flakes on the fin set. Accordingly, the radiating seat and the fin set could be combined rapidly. Moreover, the present invention reduces the distance between every fin unit of the fin set so as to promote the number of the fin units of the fin set, thereby enhancing the heat dispersing effect. Preferably, the combination of the radiating seat and the fin set is simplified.
2. The method of the present invention comprises procedures of drawing-extrusion, cutting, ripping, inserting, and punching to complete the combination of the radiating seat and the fin set. An extruded body that is proceeded with drawing-extrusion forming has at least one set of elongated strips at an upper end thereof. Thence, the extruded body is cut into separate sub rippled bodies. Thereafter, the elongated strips on the sub extruded body are ripped with intervals so as to form a plurality of separate sets of holding members on the elongated strips. The bent flakes with gaps are disposed at the bottom end of each fin unit of the fin set. When the fin set is inserted into the radiating seat, the gaps of the bent flakes are matched with the holding members. Accordingly, the holding members are punched by the punching molds for downwardly deforming so as to firmly hold at least one side of each of the gaps between the bent flakes on the fin set. Whereby, the combination of the radiating seat and the fin set is swiftly completed. The method of the present invention allows a thinner and lighter radiating seat to be accomplished. Namely, materials for drawing-extrusion forming and manufacturing costs are both reduced. Preferably, the number of the fin units of the fin set is increased, but assemblage of the radiating seat and the fin set is simplified.
3. The elongated strips are proceeded with drawing-extrusion forming so as to be symmetrically arranged. After ripping the symmetrical elongated strips with intervals, a plurality of separate sets of holding members are correspondingly provided. Punched by the punching mold, the holding members of each set deform downwards, respectively. Thereby, the deformed holding members firmly hold two sides of the bent flakes on each fin unit of the fin set, which allows a more compact combination of the radiating seat and the fin set to be achieved.
4. When the lower end of the extruded body is defined with at least one first groove in time of drawing-extrusion forming, heating tubes could be additionally provided for a compact combination. Moreover, the heating tube exposes its one plane to be aligned with the radiating seat, so that the plane of the heating tube directly contacts a heating source. Thereby, the heat sink of the present invention absorbs and disperses heat rapidly and efficiently.
5. In time of drawing-extrusion forming, at least one second groove is defined at the upper end of the radiating seat. At least one correspondent second groove is defined at the bottom end of the fin set. Whereby, at least one heating tube could be compactly arranged between the radiating seat and the fin set.
Drawing-extrusion: shape aluminum or copper metal into a long extruded body 10 (as shown in
Cutting: cut the extruded body 10 into separate sub rippled bodies 1a (as shown in
Ripping: rip the symmetrical elongated strips 101,102 on the sub extruded body to present intervals A on the elongated strips and form one radiating seat 1, accordingly forming a plurality of separate sets of holding members 11,12 (as shown in
Inserting: after the radiating seat 1 is ripped, insert the fin set 2 within the intervals A that are adjacently defined between any two sets of the holding members 11,12 orderly. Form bent flakes 21 with gaps 211 (as shown in
Punching: as shown in
In the procedure of drawing-extrusion, the elongated strips 101, 102 on the extruded body 10 could be freely deducted to one single elongated strip 101 (or 102). Namely, it is not necessary for the extruded body 10 to form the symmetrical elongated strips 101, 102 thereon. When only one single elongated strip 101 (or 102) is formed, a plurality of separate holding members 11 (or 12) are structured after the elongated strip 101 (or 102) is ripped with intervals. Accordingly, the intervals A that are adjacently defined between any two holding members 11 (or 12) accommodate the insertion of the fin set 2. After punching, the holding members 11 (or 12) deform downward and firmly hold one side of each bent flake 21 on each fin unit of the fin set 2. Accordingly, the combination of the radiating seat 1 and the fin set 2 is rapidly accomplished.
In the procedure of punching, the vacant spaces B within the fin set 2 receive the punching molds 3 for achieving a rapid punching as shown in
The combination of the radiating seat 1 and the fin set 2 are rapidly achieved through the manufacturing steps of the present invention by drawing-extrusion, cutting, ripping, inserting, and punching. Wherein, a heat sink that is lighter and consumes fewer materials is accordingly provided with the fin set having more fin units. Referring to
The radiating seat 1 is formed as a sheet. The radiating seat 1 has a plurality of sets of holding members 11,12 arranged on an upper end thereof at intervals, and an interval A between any two sets of the holding members 11,12 is defined for receiving an insertion of the fin set 2. Further, the radiating seat 1 could be drilled or threaded for forming a plurality of holes 13 (or threaded holes) thereon. Accordingly, the holes allow the radiating seat 1 to freely cooperate with a fixture or a PCB circuit board.
The shape of the fin set 2 is not limited. The fin set 2 includes bent flakes 21 with gaps 211 formed at a bottom end of each fin unit thereof. The gaps 211 are arranged corresponding to the holding members 11,12 for justly receiving the holding members 11,12, respectively.
When afore radiating seat 1 and the fin set 2 are provided, each fin unit of the fin set 2 is inserted into the intervals A that are adjacently defined between any two sets of the holding members 11,12 on the radiating seat 1 orderly. Accordingly, since the gaps 211 between any two of the bent flakes 21 are suited to the holding members 11,12 (as shown in
Similarly, it is not necessary for the heating seat 1 to form the symmetrical sets of holding members 11,12 thereon. Namely, when there is only one holding member 11 (or 12) in each set, an interval A is provided between any two holding members 11 (or 12) for accommodating the insertion of the fin set 2. After punching, the holding members 11 (or 12) deform downward and firmly hold at least one side of each bent flake 21 on each fin unit of the fin set 2. Accordingly, the combination of the radiating seat 1 and the fin set 2 is rapidly accomplished.
Referring to
While the present invention has been described with regard to particular embodiments, it is recognized that further variations, alternatives and modifications may be apparent to any person skilled in the art and be devised without departing from the scope of the present invention and the inventive concept embodied therein.
Number | Date | Country | Kind |
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201110433443.6 | Dec 2011 | CN | national |