CN1492500A - Radiator and its producing method - Google Patents

Abstract

A radiator contains many fin units and each has a radiation part and a joint part thicker than the radiation part, the joint part contacts with adjacent fin units involutoryly and adhered. The method is to prepare a mould forming fin the using it to process multiple mutually connected fin units continuously on a metal strip by pressing then to be cut and separated and adhered one by one by a current welding device, increasing radiation area and entire density of radiation fins.

Description

Radiator and preparation method thereof

[technical field]

The present invention relates to a kind of radiator and preparation method thereof, particularly relate to a kind of method that heat dissipation is preferable and produce radiator more fast and make this radiator that has.

[background technology]

Fig. 1 and Fig. 2 illustrate radiator 3 and a kind of radiator 5 that utilizes planer formula method for making to be produced that a kind of mode of utilizing aluminium extruded type of tradition is produced respectively.

Radiator 3 includes a base 31, base 31 surfaces are connected with most parallel radiating fins arranged side by side 32, behind the heat generating component 4 of the bottom surface of base 31 contact just like central processing unit chip etc., heat exchange can be carried out with air in heat transferred to each fin 31 back of heat generating component 4, and then reduce the temperature of heat generating component 4.

And because the running clock pulse of central processing unit chip has more and more high trend, its heat of supervening is considerable especially, in order to keep these heat generating component 4 normal operational temperature, the heat dissipation of radiator 3 certainly will will be promoted, and the most direct mode promptly is to increase the area of single fin 32 and the density of whole fin 32 is increased, in the hope of increasing the contact area with air whereby, and then make the radiating efficiency of radiator 3 be improved.

And with the structure of radiator 3, the area that desire increases single fin 32 then must make each fin 32 upwardly extending length increase, again, the density of desiring on the base 31 of same size to increase whole fin 32 then must make the horizontal thickness of each fin 32 reduce and the spacing of 32 of adjacent fin is dwindled, to hold the more fin 32 of more number, yet, method for making with aluminium extruded type, be subjected to the die cavity restriction of extrusion die tool, the length of fin 32 and the ratio of thickness (or title is " slenderness ratio ") have certain restriction, usually must be less than 15, so when extruding, aluminum could form the shape of fin 32 smoothly, do not produce and do not have the not enough phenomenon that forms the cavity of material flowability, again, also in order to make the die cavity in the extrusion die tool have certain intensity, the spacing that adjacent fin is 32 can not be too approaching, and high pressure can't resist material and flow the time causes die cavity to be out of shape to avoid in the extrusion die tool thin in order to the corresponding die cavity that produces fin and the thick mistake of meat between die cavity.

Based on above-mentioned, because of restrictive condition many on the aluminium extruded type method for making, under the situation of base 31 size constancies, its heat dissipation has its limit to exist, thus, wish to get better heat dissipation and have only and use the bigger radiator 3 of size, but at product towards the considering who causes the limited and every material cost of installing space under the compact designer trends down, this nonideal way of amplifying of way reality.

Again with regard to the radiator of being produced with planer formula method for making 5, its way is main to produce the germule 51 that the surface has most bar parallel grooves (scheming not show) in the mode of squeezing type earlier, utilizes a special cutter 6 to plane out in oblique mode at groove again and in layer has forniciform fin 52 slightly.The advantage of the radiator 5 that this kind method for making is produced is not have the restriction of aforementioned aluminium extracting mold, and its fin 52 thickness can reach quite thin degree, and the spacing of 52 of fin 52 and fins also can significantly be dwindled, and makes the density of whole fin 52 to get a promotion.

But technology with present stage planer formula processing, its difficulty of processing is far above the method for making of aluminium extruded type, and the requirement of facility precision is also higher, make generally on production and yields, still have to be hoisted, in addition, owing to be to adopt the oblique mode fin 52 of planing out, therefore planing out the position behind the fin 52 at edge, still further processing excision of germule 51 materials of position outside fin 52, so the making of each radiator 5 all has certain waste material to produce, and also has to be considered on cost.

[summary of the invention]

The object of the present invention is to provide a kind of radiator and preparation method thereof, it has the area of dissipation of raising radiating fin and the characteristics of integral heat sink fin density.

In order to achieve the above object, the invention provides a kind of radiator, include the plurality of fins unit, it is characterized in that:

This fin unit comprises that interconnective one laminar radiating part and a thickness are thick junction surface than this radiating part, this junction surface is formed with opposite one first and one second, first of the junction surface of this fin unit with the junction surface of this adjacent fin unit second in the face of splice grafting touches and bonds fixingly, make the radiating part of this fin unit have the liftoff arrangement of spacer each other.

Described radiator is characterized in that:

It is wavy that the radiating part of this fin can be.

The present invention also provides a kind of method of making above-mentioned radiator, it is characterized in that:

This method comprises the following step:

(1) mould of preparation one plastic this fin unit utilizes this mould to make most the fin unit that are connected to each other continuously on a metal material belt with the processing mode of exerting pressure, and this fin unit also forms this thin radiating part and this thicker junction surface;

(2) with the cutting and separating and obtain this independent fin unit in addition of interconnective fin unit on this metal material belt;

(3) use an electric current welding equipment, this electric current welding equipment has one first electrode and one second electrode of opposite polarity, and this fin unit and this first electrode got earlier wherein electrically conduct and become fin unit with first polarity;

(4) getting another this fin unit and this second electrode electrically conducts and becomes fin unit with second polarity;

(5) make this junction surface and this mutual involutory contact in junction surface with the fin unit of second polarity, cause between this junction surface and this junction surface two interfaces, make material fusion bonding by producing local high heat because of big electric current with the fin unit of second polarity with the fin unit of first polarity with the fin unit of first polarity;

(6) this fin unit and this second electrode with second polarity is broken away from, these fin unit of finishing that bond mutually then keep and this first electrode conduction;

(7) after repeating step (4) to step (6) has the number of required this fin unit up to this radiating appliance, make this radiator break away from this first electrode and this second electrode and finish.

The manufacture method of described radiator is characterized in that:

During this fin of this step (1) moulding, can make the radiating part of this fin be wavy by the die cavity shape of this mould correspondence.

[description of drawings]

Below by most preferred embodiment and accompanying drawing radiator of the present invention and preparation method thereof is elaborated, in the accompanying drawing:

Fig. 1 is the radiator side schematic appearance that a kind of tradition is produced in the aluminium extruded type mode;

Fig. 2 is the radiator side schematic appearance that another kind of tradition is produced with planer formula processing mode;

Fig. 3 is a preferred embodiment stereo appearance figure of radiator of the present invention; And

Fig. 4 is the side view of preferred embodiment, and the manufacture method that plurality of fins bonds mutually with the electric current welding schematically is described.

[embodiment]

Consult Fig. 3, a preferred embodiment of radiator 1 of the present invention is to include plurality of fins unit 11.

Each fin unit 11 all has a thinner thickness and has the laminar radiating part 111 of certain area and a thickness is thick junction surface 112 than radiating part 111, and junction surface 112 and be formed with opposite one first 1121 and 1 second 1122.In this example, radiating part 111 and further form wavy, can improve with the contact area of air about 40%, in the hope of promoting the efficient of heat radiation.Certainly, the shape of radiating part 111 is not to exceed with wavy, those who familiarize themselves with the technology reach when producing different shapes easily same increase its with the effect of air contact area, promptly differ at this and one to give an example.

During combination, first 1121 of the junction surface 112 of a fin unit 11 wherein is second 1122 involutory contacts with the junction surface 112 of adjacent another fin unit 11, make plurality of fins unit 11 112 corresponding junction surfaces 112, junction surface, radiating part 111 corresponding radiating parts 111 and be state arranged side by side, make the junction surface 112 mutual fusions and the bonding of adjacent fin unit 11 fixing again, because of the junction surface 112 of each fin unit 11 all has certain thickness, make to form fixing spacing distances in the middle of the radiating part 111 of adjacent fin unit 11.And during practical application, the junction surface 112 of each fin unit 11 can form part as the base of traditional heat-dissipating device jointly with the contact heating assembly, relends by junction surface 112 heat transferred of heat generating component is carried out heat exchange to radiating part 111 with air.

And the structure of the above-mentioned radiator 1 of foundation, its manufacture method is can the be shaped mould of fin unit 11 of preparation one earlier, this mould is looked the occasion that is applied in roller press or stamping machine and matching design, borrow roller press or stamping machine to utilize this mould on a metal material belt, to suppress the fin unit 11 that majority is connected to each other continuously in the mode of the processing of exerting pressure, in the process of roll extrusion or punching press, fin unit 11 promptly forms the structure at radiating part 111 and junction surface 112 simultaneously.Wherein, with the outward appearance of above-mentioned wavy radiating part 111, the die cavity that only needs to produce corresponding wavy radiating part 111 when Mold Making gets final product, and in like manner, the radiating part 111 of other shape need only use the mould in different shaped morphotype cave just can reach.

Then, but the fin unit 11 that the maintenance still that has been shaped on the metal material belt is connected with any machining machine and tool with cutting and separating function cutting and separating and be single fin unit 11 in addition.

As Fig. 4, re-use an electric current welding equipment 2, electric current welding equipment 2 has one first electrode 21 and one second electrode 22 of opposite polarity, if first electrode 21 is set at positive pole, then second electrode 22 will be negative pole.

A fin unit 11 and first electrode 21 got earlier during assembling wherein electrically conduct and become the anodal fin unit 11 of a band, other gets that another fin unit 11 and second electrode 22 electrically conduct and the fin unit 11 that becomes a band negative pole, make junction surface 112 mutual face-to-face involutory contacts of junction surface 112 with the fin unit 11 of band negative pole of the anodal fin unit 11 of band, between the junction surface 112 of causing the anodal fin unit 11 of band and the interface at the junction surface 112 of the fin unit 11 of being with negative pole, exist and to produce sizable electric current and pass through because of having voltage difference, cause the fusion phenomenon of material to take place so between two interfaces, can therefore produce local high heat.Make the fin unit 11 and 21 disengagings of second electrode of band negative pole again and voltage difference is disappeared, make 112 at the junction surface of two fin unit 11 form the material bonding because of no current by cooled and solidified, the fin unit 11 of bonding then still can keep and 21 conductings of first electrode mutually.

Get another fin unit 11 and 22 conductings of second electrode again, and repeat fin unit 11 that above-mentioned steps will the band negative pole and bondd mutually and still further bondd with the plurality of fins unit 11 of first electrode, 21 conductings with above-mentioned, till fixing fin unit 11 after radiator 1 has the number of required fin unit 11 so seriatim, at last, radiator 1 disengaging first electrode 21 and second electrode 22 are promptly finished.

Comprehensively above-mentioned, by the structure of radiator 1 of the present invention with and corresponding manufacture method, still the thickness of fin unit 11 can be quite not thin, length also can increase and not have restriction on the method for making, meaning is that the slenderness ratio of fin unit 11 can be than the aluminium extruded type method for making for big, make the area of dissipation of single fin unit 11 significantly to improve, effectively increase the density of whole fin 11 in unit are, so heat dissipation can significantly promote, more the mode of cutting apart winding is again made because simple roll extrusion of employing or punching press method for making are shaped on metal material belt continuously, except producing fast, the generation of waste material is quite few, can save appreciable cost of manufacture.In addition, utilize the effect of material fusion bonding can eliminate the interface thermal resistance at 112 at the junction surface of fin unit 11, can keep the heat conductivity of integral heat sink device 1.

Claims (4)

1, a kind of radiator includes the plurality of fins unit, it is characterized in that:

This fin unit comprises that interconnective one laminar radiating part and a thickness are thick junction surface than this radiating part, this junction surface is formed with opposite one first and one second, first of the junction surface of this fin unit with the junction surface of this adjacent fin unit second in the face of splice grafting touches and bonds fixingly, make the radiating part of this fin unit have the liftoff arrangement of spacer each other.

2, radiator as claimed in claim 1 is characterized in that:

The radiating part of this fin is wavy.

3, a kind of method of making radiator as claimed in claim 1 is characterized in that:

This method comprises the following step:

(1) mould of preparation one plastic this fin unit utilizes this mould to make most the fin unit that are connected to each other continuously on a metal material belt with the processing mode of exerting pressure, and this fin unit also forms this thin radiating part and this thicker junction surface;

(2) with the cutting and separating and obtain this independent fin unit in addition of interconnective fin unit on this metal material belt;

(3) use an electric current welding equipment, this electric current welding equipment has one first electrode and one second electrode of opposite polarity, and this fin unit and this first electrode got earlier wherein electrically conduct and become fin unit with first polarity;

(4) getting another this fin unit and this second electrode electrically conducts and becomes fin unit with second polarity;

(5) make this junction surface and this mutual involutory contact in junction surface with the fin unit of second polarity, cause between this junction surface and this junction surface two interfaces, make material fusion bonding by producing local high heat because of big electric current with the fin unit of second polarity with the fin unit of first polarity with the fin unit of first polarity;

(6) this fin unit and this second electrode with second polarity is broken away from, these fin unit of finishing that bond mutually then keep and this first electrode conduction;

(7) after repeating step (4) to step (6) has the number of required this fin unit up to this radiating appliance, make this radiator break away from this first electrode and this second electrode and finish.

4, the manufacture method of radiator as claimed in claim 3 is characterized in that:

During this fin of this step (1) moulding, make the radiating part of this fin be wavy by the die cavity shape of this mould correspondence.

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