TWI431237B - Heat sink and a method of making the same - Google Patents

Description

Radiator and method of manufacturing same

The present invention relates to a heat sink and a method of manufacturing the same, and more particularly to a heat sink for an electronic component and a method of manufacturing the same.

With the rapid development of information technology, the electronic components in the computer, such as the central processing unit, are running faster and faster, and the heat generated by them is increasing. If too much heat is not discharged in time, it will seriously affect the operation of the central processing unit. Stability. To this end, the industry usually installs a heat sink on the top surface of the central processor. Use a heat sink to help dissipate heat to ensure that the central processor is working properly at the right temperature.

In the prior art, the heat sink often bends a plurality of flat fins, and the bottom ends of the fins are stacked to form a base of the heat sink. The tops of the fins are radially outward. Diffusion to form a larger heat sink area. A spacer is interposed between adjacent heat dissipation fins of the base portion to provide a space between the heat dissipation fins. During the assembly process of the heat sink, the bottom end of the heat dissipation fins is correspondingly provided with a mounting hole, and a rivet is pressed into the mounting holes by a riveting device to fix the heat dissipation fins The spacers are combined to form the base. The bottom surface of the pedestal is then flattened.

However, in the manufacturing process, assembly errors often occur, so that the mounting holes of the heat sink fins and the spacers are not aligned with the rivets, so that when the riveting device is working, it is easy to damage the heat sink fins and the spacers or Rivets cause poor heat sink manufacturing.

In view of the above, it is necessary to provide a heat sink that is easy to manufacture and a method of manufacturing the same.

A method for manufacturing a heat sink, comprising the steps of: (a) providing a plurality of heat dissipating fins, wherein the heat dissipating fins have a first portion and a second portion at a distance from the first portion (b) limiting the first portion of the heat dissipating fins in the lateral direction; (c) providing a kneading force, applying a lateral pressure to the second portion of the heat dissipating fins, such that the fins The sheet is bent and deformed because the first portion is laterally constrained, and the second portion of the fins is gathered to form a heat conducting base, and the first portion is radially expanded.

A heat sink includes a plurality of heat dissipating fins having a first portion and a second portion, wherein the second portions of the heat dissipating fins are stacked to form a heat conducting base, the heat dissipating fins The first portion is radially deployed, and the heat sink further includes at least one sleeve disposed on a periphery of the thermally conductive base.

Compared with the prior art, the outer periphery of the base is provided with at least one sleeve to tighten the bottom end of the heat dissipation fin, so as to avoid the problem of improper positioning by rivet riveting.

The heat sink fins do not need to be pre-bent into a set shape, and do not provide a spacer, but directly place the first portion of the heat sink fin at a lateral upper limit position, and then apply a pinching force to the second heat sink fin. The second portion of the heat dissipating fin is gathered, and the first portion is radially expanded.

10‧‧‧ radiator

12‧‧‧ Pedestal

13‧‧‧Karts

20, 11‧‧‧ Heat sink fins

30‧‧‧Retaining frame

31‧‧‧Contact plate

32‧‧‧Installation arm

33‧‧‧through hole

40‧‧‧ sleeve

41‧‧‧Metal plates

42‧‧‧fasteners

43‧‧‧Installation

50‧‧‧ buckle

51‧‧‧ Spring

52‧‧‧ screws

53‧‧‧ circlip

1 is a perspective assembled view of a heat sink according to an embodiment of the present invention.

2 is an exploded perspective view of the heat sink of FIG. 1.

3 to 6 are schematic views of the heat sink manufacturing process of FIG. 1.

Referring to FIG. 1 and FIG. 2 , the heat sink 10 of the embodiment of the present invention includes a plurality of heat sink fins 20 at the bottom end, two fixing frames 30 disposed at the bottom end of the heat sink fins 20 , and the heat sink fins The bottom end 40 has two sleeves 40 fixed to the bottom end and a plurality of sleeves 40 which are disposed on the fixing frame 30 to mount the heat sink 10 to an electronic component (not shown).

The heat dissipation fins 20 are made of a metal material having good thermal conductivity, such as copper or aluminum. The bottom ends of the heat dissipation fins 20 are stacked together to form the base 12 of the heat sink 10. The susceptor 12 has a substantially rectangular parallelepiped shape, and a bottom surface thereof is directly attached to the electronic component to absorb heat generated by the electronic component. The tops of the fins 20 are radially outwardly diffused and form an arc-like structure at the top end.

The two fixing brackets 30 are respectively disposed on opposite sides of the base 12 of the heat sink 10 . Each of the holders 30 includes a contact plate 31 and two mounting arms 32 extending horizontally outward from the top end of the contact plate 31. The mounting arm 32 has an elongated shape with a through hole 33 at its end for the fastener 50 to pass through. The contact plates 31 of the two mounting brackets 30 are respectively attached to opposite sides of the base 12, and the four mounting arms 32 extend outwardly of the base 12.

The sleeve 40 includes a metal plate 41 surrounding the periphery of the base 12 and two fasteners 42 for fixing the two ends of the metal plate 41 together. The metal plate 41 is bent around the periphery of the base 12 and bent outward at both ends of the metal plate 41 to form two mounting pieces 43. The two mounting tabs 43 are adjacent to each other for the fastener 42 to be threaded. The two sleeves 40 are arranged side by side on the periphery of the base 12 .

The clip 50 includes a set of screws 52 provided with a spring 51 and a bottom end of the screw 52 The circlip 53.

Referring to FIG. 3 to FIG. 6, the present invention also provides a method for manufacturing the heat sink 10. The main steps include:

(1) A plurality of flat fins 11 and a plurality of columnar pins 13 are provided. The heat dissipating fins 11 can be cut from the entire heat sink by one of the extruded heat sinks. The heat dissipation fins 11 are arranged in parallel at equal intervals. A card pin 13 is disposed between the adjacent two heat dissipation fins 11 perpendicular to the longitudinal direction of the heat dissipation fins 11 , and the bayonet 13 is located in the middle of the heat dissipation fins 11 . The bayonet pins 13 are fixed and arranged in a row to center the plurality of fins 11 in the lateral upper limit position.

(2) Two fixing frames 30 are provided. Each of the fixing frames 30 has a contact plate 31 and a mounting arm 32 perpendicular to the contact plate 31. The contact plates 31 of the two fixing frames 30 are respectively attached to the heat dissipating fins 11 The outer side of the outer fins 11 is located on the outer side of the fins 11 and located at the bottom of the corresponding fins 11. The bayonet 13 is located above the fixing frame 30.

(3) A kneading force is provided which acts perpendicularly on the contact plate 31 of the two holders 30. When the pinching force forces the two side heat dissipating fins 11 toward the middle, since the bayonet 13 is fixed, the movement of the heat dissipating fins 11 in the lateral direction is blocked, and thus the bottom end is bent to form the heat sink 10 The susceptor 12 is radially spread at the top end to form an arcuate structure.

(4) Two sleeves 40 are provided, and the two sleeves 40 are sleeved side by side on the periphery of the base 12, and the fixing frame 30 and the base 12 are tightly bundled together to function as a stable type.

(5) The bottom of the susceptor 12 is flattened so that the bottom surface of the susceptor 12 is in close contact with an electronic component (not shown).

(6) A plurality of clips 50 are provided, and the clips 50 are disposed on the mounting arms 32 of the mounts 30.

It can be understood that after the step (1), a kneading force may be first provided to force the bottom end of the heat dissipation fin 11 to be gathered to form the base 12, and then the fixing frame is respectively attached on opposite sides of the base 12 30.

Compared with the prior art, the flat fins 11 of the heat sink 10 do not need to be bent into a set shape in advance, and the spacers are not provided, and the flat fins 11 are directly inserted at equal intervals. The pin 13 is fixed in advance. The bottom end of the heat dissipation fin 11 is formed on the fixing frame 30 on both sides of the heat dissipation fin 11 so that the bottom end of the heat dissipation fin 11 forms the base 12 of the heat sink 10. The top end of the heat dissipation fin 11 is radially expanded. Then, the sleeves 40 are sleeved on the periphery of the base 12 to fix the fixing bracket 30 and the bottom end of the heat dissipation fins. It is not necessary to open a mounting hole at the bottom end of the heat dissipation fins 11, and then accurately position the rivets and insert the rivets into the installation. Inside the hole. Moreover, the screw 52 and the circlip 53 which are low in cost and versatile are mounted on the fixing frame 30, so that the heat sink 10 can be attached to the electronic component. There is no need to separately make a fastener suitable for the heat sink 10. In general, the heat sink 10 of the present invention has a simpler manufacturing process and a lower manufacturing cost.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧ radiator

12‧‧‧ Pedestal

20‧‧‧ Heat sink fins

30‧‧‧Retaining frame

31‧‧‧Contact plate

32‧‧‧Installation arm

33‧‧‧through hole

40‧‧‧ sleeve

41‧‧‧Metal plates

42‧‧‧fasteners

43‧‧‧Installation

50‧‧‧ buckle

51‧‧‧ Spring

52‧‧‧ screws

53‧‧‧ circlip

Claims (8)

A method for manufacturing a heat sink, comprising the steps of: (a) providing a plurality of heat dissipating fins, wherein the heat dissipating fins have a first portion and a second portion at a distance from the first portion (b) limiting the first portion of the heat dissipating fins in the lateral direction; (c) providing a kneading force, applying a lateral pressure to the second portion of the heat dissipating fins, such that the fins The sheet is bent and deformed because the first portion is laterally constrained, and the second portion of the heat dissipating fins is gathered to form a heat conducting base, the first portion is radially expanded; (d) the second fixing frame is provided The two fixing brackets are respectively disposed on opposite sides of the heat conducting base; and (e) providing at least one sleeve, the at least one sleeve is sleeved on the second portion of the heat dissipation fins to tighten the fixing Mounted on the second part of the heat sink fins. The method for manufacturing a heat sink according to claim 1, wherein the step (b) is performed by disposing a plurality of bayonet pins in the gap formed by the heat dissipating fins and fixing the fins. A position is limited in the lateral direction. The heat sink manufacturing method of claim 2, wherein the step (c) further comprises two fixing brackets respectively attached to opposite sides of the heat dissipating fins, wherein the kneading force is caused by Acting on the two fixing frames to act on the heat dissipation fins. The method of manufacturing a heat sink according to claim 1, wherein the heat dissipation fins are cut from one of the extruded heat sinks. The method of manufacturing a heat sink according to claim 4, wherein the holder comprises a contact plate and two mounting arms extending horizontally outward from a top end of the contact plate. The method of manufacturing a heat sink according to claim 5, further comprising: inserting a plurality of screws on the mounting arm of the fixing frame. The method of manufacturing a heat sink according to claim 1, further comprising milling the bottom surface of the heat conductive base. A heat sink includes a plurality of heat dissipation fins, each of the heat dissipation fins has a first portion and a second portion, and the second portions of the heat dissipation fins are stacked to form a heat conduction base, and the heat dissipation fins The first portion is radially expanded, and the improvement is that the heat sink further comprises at least one sleeve, the at least one sleeve is sleeved on the periphery of the heat-conducting base, and the heat sink further comprises two fixing frames, the two fixing frames They are respectively disposed on opposite sides of the heat-conducting base, and the at least one sleeve is sleeved on the periphery of the fixing frame to fasten the fixing frame to the heat-conducting base.