JPH0326545B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a fin for a heat sink,
Specifically, it relates to a method for manufacturing a fin for a heat sink, which is attached to a metal substrate of a heat sink to which heat generating components such as transistors, diodes, and thyristors are attached and which radiates heat generated inside the heat generating components.
The purpose is to provide a method for manufacturing fins for a heat radiator, which can reduce the amount of material used for the fins and easily obtain hollow fins with good heat dissipation efficiency.

Even if the distal end of the heatsink fin attached to the metal substrate of the heatsink is made thinner than the base end on the metal substrate side, the heat dissipation efficiency will not decrease. Therefore, from the viewpoint of reducing the amount of fin material, it is desirable to form the radiator fins thinner from the base end to the distal end thereof. However, it is difficult to form hollow fins with thin walls from the base end to the distal end by extrusion molding of aluminum or the like. Furthermore, in order to mold heatsink fins of different lengths, various molds must be prepared to match the lengths.

According to the present invention, by sequentially stacking several types of fin units having different fin thicknesses, a hollow radiator fin having a tip portion thinner than a base end portion on the metal substrate side can be easily obtained. Furthermore, this is a method for manufacturing heat sink fins that allows the length of the fins to be easily changed. The fin units are successively stacked and bonded from thick fin units to fin units with thin fins in a fixed direction.

Embodiments of the invention will now be described in detail in the accompanying drawings.

The method of manufacturing fins for a heat sink according to the present invention uses several types of fin units 1, 2, and 3 in which the fins have different wall thicknesses in a certain direction, as shown in FIG. 1A, B, and C. It is something. In the fin unit 1 shown in FIG. The wall thickness of 31 is
Vertical fins 21 of the fin unit 2 shown in FIG.
It's thinner than that. However, the lateral fins 12, 22, 32 of each fin unit 1, 2, 3
The wall thickness can be set arbitrarily. Even if the horizontal fins 12 and 22 are thinner than the vertical fins 11 and 21 as in fin units 1 and 2, the vertical fins 31 and the horizontal fins 32 are the same as in fin unit 3. It may be thick. Although these three types of fin units 1, 2, and 3 are illustrated, the present invention is not limited thereto. Furthermore, the shape of the fin unit does not matter. The fin unit may be made up of two vertical fins and one horizontal fin as shown in FIG. 4, or may have other shapes (not shown). . Also, instead of vertical fins,
There may be several types of fin units having different thicknesses of the fins in the lateral direction. What is important is that several types of fin units are formed with fins having different wall thicknesses. A plurality of these several types of fin units 1, 2, and 3 are formed in advance by, for example, extrusion molding of an aluminum material. Then, the fin units 1 having thick fins to the fin units 2 and 3 having thin fins are sequentially stacked in a fixed direction. For example, as shown in FIG. 2, a plurality of fin units 1 with thick vertical fins 11 are arranged in the horizontal direction, and fin units 2 with thin fins 21 are stacked vertically on top of them. Further, the fin units 3, in which the vertical fins 31 are thinner than the vertical fins 21 of the fin units 2, are stacked vertically. The fins of each fin unit 1, 2, and 3 thus stacked are joined. That is, the vertical fins 11 of the fin unit 1 and the vertical fins 21 of the fin unit 2 are joined, and the vertical fins 21 of the fin unit 2 and the vertical fins 31 of the fin unit 3 are joined. These fin units 1,
The second and third vertical fins 11, 21, and 31 are joined by, for example, brazing. Also, the vertical fins 1 of each adjacent fin units 1, 2, and 3
1, 21, 31 and horizontal fins 12, 22, 3
2 are similarly joined by brazing or the like to obtain a hollow radiator fin A as shown in FIG.

Note that when fin units 1, 2, and 3 are stacked vertically, an intervening plate 4 is installed between fin units 1 and 2, and between fin units 2 and 3, respectively.
An example is shown in which a . This interposed plate 4 is made of aluminum material, and brazing material is provided on both sides thereof. If such an intervening plate 4 is interposed and the fin units 1, 2, and 3 are stacked,
This is preferable because the fin units 1, 2, and 3 can be easily stacked, and the longitudinal fins 11, 21, and 31 of the fin units 1, 2, and 3 can be easily joined.

The heatsink fin A obtained in this way is
As shown in FIG. 3, a fin unit 1 having thick longitudinal fins is placed on the metal substrate 5 side and attached to the metal substrate 5 by brazing or the like. A heat generating component 6 such as a transistor, a diode, a thyristor, etc. is attached to this metal substrate 5, and the heat generating component 6 is used as a heat radiator for dissipating heat generated inside the heat generating component 6.

As described above, the method for manufacturing fins for a heat sink according to the present invention uses several types of fin units formed with different fin wall thicknesses, and changes from a fin unit with a thick fin wall thickness to a fin unit with a thin fin wall thickness. Lay them one on top of the other in a certain direction. Also, the fins of the stacked fin units are joined. In this way, it is easy to obtain a heatsink fin in which a thick fin and a thin fin are integrated, and the tip of the heatsink fin is thinner than the base end on the metal substrate side. Materials for fins can be reduced. Furthermore, in addition to obtaining radiator fins that are hollow and have a large heat dissipation area and good heat dissipation efficiency, it is also possible to obtain radiator fins with different overall fin lengths by simply selecting the number of fin units to be stacked. This method has various advantages as a method for manufacturing heat sink fins.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG.
B and C are perspective views of the fin unit used in carrying out the present invention, FIG. 2 is a perspective view showing one process, and FIG.
The figure is a front view of a radiator fin obtained according to the present invention, and FIG. 4 is a perspective view of a fin unit showing another embodiment. In the figure, A indicates a radiator fin, 1, 2, and 3 are fin units, 4 is an intervening plate, and 11, 21, and 31 are longitudinal fins.

Claims (1)

[Claims] 1. When manufacturing radiator fins by stacking multiple fin units, several types of fin units with different fin wall thicknesses are used, and an intervening plate with brazing material provided on both sides is attached to each fin unit. A method for producing fins for a heat sink, characterized by sequentially stacking and joining fin units from thicker fins to thinner fins in a fixed direction while interposing the fins in between.