JP2003181526A - Extruding tool, method for manufacturing finned shape material and heat sink - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an extruding tool which enables the excellent flatness of a substrate to be obtained in the extrusion molding of such a finished shape material as a heat sink. <P>SOLUTION: The extruding tool 10 is provided with a die body 20 having a substrate forming section 22 and a fin forming section 23 and provided with a bearing hole 21 for forming an outer circumferential contour and a plate 30. The plate 30 has a material passing hole 31 which is located behind the die body 20, is through forward and backward and communicates with an opening at the rear end of the bearing hole 21 of the die body 20. At least one vertical partition wall 33, 34 crossing the substrate forming section 22 of the bearing hole 21 in the direction of the thickness of a substrate 2 is formed in the passing hole 31 in the state of being combined with the die body 20. The material passing hole 31 is divided by the vertical partition wall 33, 34 into a plurality of small passing holes 31a, 31b, 31c, 31d, 31e and 31f. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruding tool for producing a fin-shaped shaped member in which a large number of thin plate fins are arranged side by side on a substrate, and a fin-shaped shaped manufacturing method using the extruding tool. It relates to a heat sink manufactured by this method.

In this specification, the terms "front" and "front end" represent the exit side of the extruded material or the direction in which the extruded material advances, and the terms "rear" and "rear end" in the opposite direction. It shall represent the entry side of the material.

[0003]

2. Description of the Related Art As one of heat radiating members used in electronic equipment, a large number of thin plate fins (3) are arranged in a comb shape on one surface of a substrate (2) as shown in FIG. There is an aluminum heat sink (1). This heatsink (1) is the substrate (2)
It is used by attaching various heating elements to the other surface side (2a).

The heat sink (1) is required to have a large tong ratio in the fins (3) in order to enhance heat dissipation performance, and in the substrate (2), heat conduction from various heating elements is not hindered. The other side (2
The flatness of a) is obtained.

Such a heat sink (1) is provided with a bearing hole (21) corresponding to the outer peripheral shape of the heat sink (1) as shown in FIG. Often manufactured by extrusion using a die 50. The bearing hole
(21) is a board molding part (22) and a fin (3) corresponding to the board (2).
And a fin forming part (23) corresponding to.

In general, in extrusion molding of a complicated shape, the flow resistance of the extruded material becomes uneven due to the bearing width of the die (50) and the distance from the bearing surface, and the extruded profile is distorted due to the difference in the flow rate of the material. There is a problem of forming defects such as bending. One method of coping with such a molding failure is to increase the bearing length of a portion having a small flow resistance to increase the flow resistance and adjust the overall flow rate balance.

Such a problem also occurs in the extrusion molding of the heat sink (1), resulting in a high tong ratio and a substrate (2).
The balance of the flow rate is adjusted by the length of the bearing to ensure flatness. That is, in order to mold the fin (3) having a high tong ratio, the bearing length of the substrate molding portion (22) having a small flow resistance of the extruded material is made longer than that of the fin molding portion (23). Further, in order to obtain the flatness of the substrate (2), the flow rate balance is adjusted by making the bearing length of the intermediate portion in the width direction where the flow resistance is small in the substrate molding portion (22) longer than both end portions. .

[0008]

[Problems to be Solved by the Invention] However, the substrate
When setting the bearing length to obtain the flatness of (2), not only the dimensions of the substrate (2) but also the overall shape including the fins (3), extrusion conditions, type of material, etc. affect each other in a complicated manner. ,
This is an extremely time-consuming task that requires repeated trial production and individual handling. Moreover, the wider the width (W) of the substrate (2), the greater the difference in flow resistance between the end portions and the intermediate portion, so that deformation easily occurs, the amount of deformation is large, and the work of setting the bearing length becomes complicated.

Moreover, even if the bearing length of the substrate forming part (22) is adjusted through complicated steps, it is often impossible to obtain a flatness which is satisfactory in terms of adhesion with the heating element. Degree is being done. Post-processing is
The flatness of the extruded profile is roughly corrected by roll straightening, and then the mounting surface (2a) for the heating element is further ground. However, if the fins (3) are not high, the roll straightening itself becomes difficult to work, and it is not a method to reliably achieve the flatness of the substrate (2), and thus a method to reliably manufacture a heat sink with excellent heat dissipation performance. .

In view of the above-mentioned technical background, the present invention provides an extrusion tool capable of obtaining excellent flatness in a substrate when extrusion-molding a fin-shaped shaped material such as a heat sink, and uses this extrusion tool. An object of the present invention is to provide a manufacturing method of a fin-shaped material and a heat sink manufactured by this manufacturing method.

[0011]

In order to achieve the above object, in the extrusion tool of the present invention, a large number of thin plate fins (3) are arranged side by side in a comb shape on one surface of a substrate (2). Profile with fins
An extrusion tool (10) for extrusion-molding (1), wherein the substrate
(2) having a substrate molding portion (22) corresponding to the fin (3) corresponding to the fin molding portion (23), the fin-shaped profile (1)
A die body (20) having a bearing hole (21) for molding the outer peripheral shape of the die body, and the bearing hole of the die body (20) disposed behind the die body (20) and penetrating in the front-back direction. 21) has a material passage hole (31) communicating with the rear end opening,
In the material passage hole (31), in a state of being combined with the die body (20), at least one vertical portion that crosses the substrate forming portion (22) of the bearing hole (21) in the thickness direction of the substrate (2). Partition
(33) (34) are formed, and the material passage holes (31) are composed of a plurality of small passage holes (31a) (31b) (31c) (31d) (3) by the vertical partition walls (33) (34).
The basic gist is to include a plate (30) divided into 1e) and (31f).

In the extrusion tool, the plate
In the material passage hole (31) of (30), two or more vertical partition walls (33)
It is preferable that (34) is formed.

In the front part of the material passage hole (31) of the plate (30), the plurality of small passage holes (31a) (31b) (31c), (31
It is preferable that the pressure bonding spaces (37a) and (37b) in which d) (31e) and (31f) are connected and integrated are formed.

It is preferable that the vertical barrier ribs (33) (34) are formed so as to extend over the fin forming portion (23).

In the material passage hole (31) of the plate (30),
In the combined state with the die body (20), it is preferable that a horizontal partition wall (32) is formed at a boundary portion between the substrate molding portion (22) and the fin molding portion (23).

The horizontal partition wall (32) has a front substrate molding portion (2
It is preferable that the wall surface on the 2) side is formed as an inclined surface (35) which is inclined forward to the fin forming portion (23) side.

In the die body (20), the extruded material is communicated with the bearing hole (21) at the rear portion of the die hole (2).
It is preferable that an introduction recess (24) leading to 1) is formed.

The method for producing a fin-shaped profile according to the present invention is an extrusion molding of a fin-shaped profile (1) in which a large number of thin plate-shaped fins (3) are arranged side by side in a comb shape on one surface of a substrate (2). How to do
The material passage has a material passage hole (31) which is disposed behind the die body (20) and penetrates in the front-rear direction to communicate with the rear end opening of the bearing hole (21) of the die body (20). Perforated (31)
At least one vertical partition wall (33) (34) that crosses the substrate molding portion (22) of the bearing hole (21) in the thickness direction of the substrate (2) in the state of being combined with the die body (20). And the material passage holes (31) are divided into a plurality of small passage holes (31a) (31b) (31c) (31d) (31e) (31f) by the vertical partition walls (33) (34). Using the extrusion tool (10) with the plate (30), small passage holes (31a) (31b) (31c) (31d) of the plate (30)
The basic gist is that the extruded materials, which are dividedly supplied through (31e) and (31f), are joined and pressure-bonded and extruded from the bearing hole (21).

In the method of manufacturing the profiled member with fins, the extruded material is preferably aluminum.

10. The method for manufacturing a finned profile according to claim 8, wherein the finned profile is a heat sink.

The gist of the heat sink of the present invention is that it is manufactured by the method of claim 10.

[0022]

1 to 5 show an embodiment of an extrusion tool (10) according to the present invention, which is a thick substrate (2) shown in FIG.
It is used for extrusion molding of an aluminum heat sink (1) in which a large number of thin plate fins (3) are arranged in a comb shape on one surface. 2 and 5, (40) is a container, and (41) is an extruded material loaded in the container (40).

The extrusion tool (10) is constructed by combining a die body (20) and a plate (30).

As shown in FIGS. 1 to 3 and 5, in the die body (20), a bearing hole (21) for molding the outer peripheral portion of the heat sink (1) has a substrate molding portion corresponding to the substrate (2). (22) and a fin forming part (23) corresponding to the fin (3), and an introduction recess (24) for guiding the extruded material into the bearing hole (21) is formed behind the bearing hole (21). There is.

As shown in FIGS. 1, 2, 4, and 5, in the plate (30), the plate (30) is penetrated in the front-rear direction to the rear end opening of the introduction recess (24) of the die body (20). A material passage hole (31) that communicates is formed. This material passage hole
The (31) has a horizontal bulkhead (32) at the central portion in the vertical direction in the drawing, and two vertical bulkheads (33) (3) at three laterally divided positions.
4), and the inside of the hole is divided into six small passage holes (31a) (31b) (31c) (31d) (31e) (31f) by these partition walls (32) (33) (34). .

The horizontal partition wall (32), when combined with the die body (20), has a substrate molding portion (22) and a fin molding portion.
The wall surface on the substrate forming part (22) side of the front part, which is located at the boundary with the (23), inclines toward the fin forming part (23) side in front.
5), and the tip surface (36) has a plate (3
It is formed in the same plane as the front end face of (0). The horizontal partition
(32), in the material passage hole (31), extruded material (41) to the upper small passage hole side (31a) (31b) (31c) and the lower passage hole (31d)
(31e) (31f) and the diversion to the main body of the die (20), the lower passage holes (31d) (31e) (3) due to the inclined surface (33).
The cross-sectional area in the hole of 1f) is enlarged to increase the flow rate to the substrate molding portion (22).

The vertical bulkheads (33) (34) are attached to the die body (2
In a combination state with (0), the bearing hole (21) is formed at a position which is divided into three equal parts in the width (W) direction of the substrate (2) across the substrate forming part (22) and the fin forming part (23). Has been done. These vertical bulkheads (33) (34) are formed rearward from the position retracted from the front end face of the plate (30), and in the front part of the material passage hole (31), the upper small partition which is divided into left and right is divided into three parts. Passage hole side (31a) (31b) (3
1c) are integrated and communicate with each other to form an upper crimping space (36a), and the lower small passage holes (31d) (31e) (31
f) communicates with each other to form a lower crimping space (37b). The vertical partition walls (33) (34) are, in the material passage hole (31), a small passage hole (31a) (31d) on the left side of the extruded material (41), a small passage hole (31b) (31e) in the center. , The small passage holes (31c) (31f) on the right side, and these small passage holes (31a) (31d), (31b) (31e), (3
The extruded material (41), which has passed through 1c) and (31f) and is divided into three parts on the left and right, merges and is pressure bonded in the pressure bonding spaces (37a) and (37b) (FIG. 5).

Therefore, the die body (20) and the plate (3
In the extrusion tool (10) combined with (0), the extruded material flows as follows to form the heat sink (1).

The extruded material (41) in the container (40) has six small passage holes in the material passage holes (31) of the plate (30).
(31a) (31b) (31c) (31d) (31e) (31f) diverted and proceeded, the extrusion material that passed through the upper small passage hole side (31a) (31b) (31c) (41 ) Joins and crimps in the upper crimping space (37a), and the extruded material (41) that has passed through the small passage holes (31d) (31e) (31f) in the lower side is in the lower crimping space (37b). Join and crimp. That is, in the plate (30), the extruded material (41) that is divided into six parts in the rear part in the left, right, up, and down is integrated into the left and right flows in the front part, and becomes two flows divided in the up and down direction. . Further, these two flows are merged and pressure-bonded in the introduction recess (24) of the die body (20), and are extruded together with the extruded material (41) from the bearing hole (21), so that the heat sink (1) having a required shape is extruded. Be done.

In this series of extruded material (41) streams,
In the material passage hole (31) of the plate (30), the flow resistance becomes relatively large at the left and right ends of the hole (31) and the portions in contact with the vertical partition walls (33) and (34), and the hole (31) The flow resistance is relatively small at the left and right ends of the column or in the portions apart from the vertical partition walls (33) and (34). For this reason, the flow resistance in the left-right direction is in a state in which the magnitude repeats in small increments.
The difference in the flow resistance in the left-right direction is
7a) and (37b), and then the introduction recess (2
In 4), the upper and lower split flows are gradually leveled and reduced while they join, and are introduced into the bearing hole (21) in a state where the flow rate balance is almost uniform. As a result, bearing holes
The flow resistance in the width direction of the substrate molding portion (22) of (21) is made uniform, the bearing hole dimension is accurately reflected and extruded, and a substrate (2) having high flatness is formed.

In the plate (30) of this embodiment, horizontal partition walls (32) are provided in addition to the above-described vertical partition walls (33) (34). This horizontal partition wall (32) divides the upper and lower parts of the extruded material (41) to adjust the flow resistance to the fin forming part (23) to be large, and contributes to the formation of fins with a high tong ratio. . By forming the horizontal barrier ribs, in addition to the flatness of the substrate portion (2) by the vertical barrier ribs described above, it is possible to mold the fins (3) with a high tong ratio, and by combining these, a heat sink having excellent heat dissipation performance is extrusion molded. can do.

The extrusion tool of the present invention is not limited to the above-mentioned form.

If there is at least one vertical partition wall of the plate, the flow resistance difference in the width direction of the substrate molding portion can be reduced, and it is preferable to provide two or more vertical partition walls. The appropriate number of vertical barrier ribs depends on the width (W) of the substrate portion, and it is preferable to provide a larger number as the width (W) increases. However, if an excessive number is provided, the flow resistance becomes too large as a whole, and by providing a large number of vertical partition walls, the partition wall width becomes smaller and the partition wall strength decreases. For example,
If the width (W) of the substrate (2) is about 300 mm, the number of vertical partition walls is preferably 2 or 3.

The vertical partition walls (33) and (34) are bearing holes.
Although it is formed so as to straddle the substrate molding portion (22) and the fin molding portion (23) of (21), at least the substrate molding portion (22) may be crossed. It is preferable to straddle the substrate molding portion (22) and the fin molding portion (23), and the difference in flow resistance can be easily eliminated.

Further, in the above-mentioned extrusion tool (10), the left and right merging pressure bonding of the extruded material (41) is performed in the pressure bonding space of the plate (30), and the vertical merging pressure bonding is introduced into the die body (20). Although it is performed in the concave portion (24), the confluent pressure bonding position in each direction is not limited to this. For example, it is also possible to perform vertical merging / compression bonding in the plate (30) to combine a die body of a type in which a bearing hole is opened at the rear end surface, and the die body (2
Another plate for performing merge and pressure bonding may be added between 0) and the plate (30).

Further, in the extrusion tool of the present invention,
The substrate molding portion (22) of the die body (20), in other words, the substrate shape of the finned profile is not limited to the above-mentioned flat plate shape.
For example, the present invention also includes a projecting leg or the like for mounting on a heating element.

The method for producing a fin-shaped profile according to the present invention is a method for extruding the fin-shaped profile (1) using the extrusion tool (10) according to the present invention, which comprises a small passage of the plate (30). Hole (3
1a) (31b) (31c) (31d) (31e) (31f) extruded material that is divided and supplied by extrusion is merged and crimped and extruded from the bearing hole (21), the width of the substrate molding portion (22) Since the flow resistance in the direction is made uniform, it is possible to manufacture a finned profile having excellent flatness of the substrate (2). Therefore, the desired finned profile can be manufactured without post-processing such as roll straightening and grinding after extrusion.

The method for manufacturing a fin-shaped shaped material as described above is suitable when the extruded material is aluminum. The type of aluminum is not limited, and high-purity aluminum, JIS A1000 series Al or Al alloy, A2
000 series Al-Cu alloys, A3000 series Al-M
n-based alloy, A4000-based Al-Si-based alloy, A500
0-based Al-Mg-based alloy, A6000-based Al-Si-
It can be widely applied to Mg-based alloys, A7000-based Al-Zn-Mg-Cu-based alloys and Al-Zn-Mg-based alloys.

Further, the manufacturing method is suitable for manufacturing a heat sink, and a substrate having excellent flatness can be obtained. Therefore, a heat sink having good adhesion to various heating elements can be manufactured only by extrusion. Further, as the heat sink material, JIS A6000 series alloy, particularly A6, which has good extrudability and thermal conductivity.
063 alloy can be recommended.

[0040]

EXAMPLE A heat sink extrusion experiment was carried out using the extrusion tool (1) shown in FIGS. 1 to 5 or several types of extrusion tools in which the number of vertical partition walls in the plate (30) was changed.

The heat sink (1) is the width (W) of the substrate (2);
299.8 mm, substrate (2) thickness (T); 6.5 mm, fin (3) thickness (FT); 1.5 mm, fin height (F)
H); 15.5 mm, fin spacing (FP): 4.2 mm.

In the extrusion tool (10), the die body (20)
The bearing hole (21) was formed in the substrate molding portion (22) and the fin molding portion (23) corresponding to the above heat sink dimensions.
The depth of the introduction recess 24 was 10 mm.

Under the common condition that the plate (30) has a horizontal partition wall (32), the following four kinds having different numbers of vertical partition walls were prepared and combined with the die body (20). The horizontal partition (3
In 2), the width (S1) was 26 mm, the width (S2) of the tip surface (36) was 4 mm, and the inclination angle (θ) of the inclined surface (35) was 45 ° (see FIG. 2). In addition, the vertical barrier ribs have a width (S3) regardless of the number.
The depth (S4) of the pressure bonding spaces (37a) (37b) was set to 20 mm, and the thickness (S5) of the plate (30) was set to 40 mm with respect to 130 mm (see FIG. 5). (Embodiment 1) One vertical partition wall was formed at the center position of the material passage hole (31) in the left-right direction, that is, at the center of the substrate molding part (22) in the state of being combined with the die body (10). Therefore, the material passage hole (31) is divided into four by the horizontal partition and the vertical partition. (Embodiment 2) Two vertical partition walls were formed at three positions in the left-right direction of the material passage hole (31), that is, at positions shown in FIG. Therefore, the material passage hole (31) is divided into six by the horizontal partition and the vertical partition. (Embodiment 3) Three vertical partition walls were formed in the material passage hole (31) in four lateral positions. Therefore, the material passage hole (31) is divided into eight by the horizontal partition and the vertical partition. (Comparative Example) No vertical partition was formed. Therefore, the material passage hole (31) is divided into two by only the horizontal partition wall.

Using the above-mentioned four types of extrusion tools, JIS
A6063 aluminum alloy as extruded material, length 31
Ten 00 mm long materials were extruded.

The flatness of the substrate was measured for each of the ten long extruded materials. Flatness is the mounting surface (2a) on the heating element, etc.
In, the difference between the highest position and the lowest position was used. Table 1 shows the maximum value of the flatness of each of the ten long extruded materials (from the lowest flatness to the highest flatness).

[0046]

[Table 1]

From the results shown in Table 1, it was confirmed that the flatness of the substrate can be improved by providing at least one vertical partition in the material passage hole of the plate.

Further, in the heat sinks manufactured by the extrusion tools of Examples 1 to 3, the flatness of the substrate was at a satisfactory level in terms of adhesion with the heating element. Also, the fin was not deformed and was well formed.

[0049]

INDUSTRIAL APPLICABILITY As described above, the extrusion tool of the present invention is an extrusion tool for extrusion-molding a finned shaped member in which a large number of thin plate-shaped fins are arranged in a comb shape on one surface of a substrate. A die main body having a substrate forming portion corresponding to the substrate and a fin forming portion corresponding to the fin, and a bearing hole for forming the outer peripheral shape of the fin-shaped shaped member, and a rear portion of the die main body. A material passage hole that is disposed and penetrates in the front-rear direction and communicates with the rear end opening of the bearing hole of the die body, and in the material passage hole, in the state of combination with the die body, forming the substrate of the bearing hole Since at least one vertical partition wall that crosses the portion in the thickness direction of the substrate is formed, and the vertical partition wall divides the material passage hole into a plurality of small passage holes, a plate is formed. Are equalized flow resistance in the width direction of the sheet forming section, the bearing hole dimensions are extruded are reflected accurately, high flatness substrate is formed.

In the extrusion tool, when two or more vertical partition walls are formed, uniformization of flow resistance is promoted, and particularly excellent flatness is obtained.

Further, in the case where a crimping space in which the plurality of small passage holes are communicated with each other is formed in the front portion of the material passage hole of the plate, the merge crimping is performed in the plate.

Further, when the vertical partition wall is formed so as to extend over the fin molding portion, the difference in flow resistance is easily eliminated.

When a horizontal partition wall is formed in the material passage hole of the plate at a boundary portion between the substrate forming portion and the fin forming portion in a combined state with the die body, the flow rate in the fin is adjusted. A fin with a high tong ratio can be formed well.

It is preferable that the wall of the horizontal partition on the side of the substrate forming section at the front is formed to be an inclined surface that is inclined forward to the side of the fin forming section, so that the flow rate to the substrate forming section can be increased. .

In the die body, it is preferable that a rear portion is formed with an introduction recess communicating with the bearing hole and guiding the extruded material to the bearing hole. be able to.

The method for producing a fin-shaped profile according to the present invention is a method for extrusion-molding a fin-shaped profile using the above-mentioned extrusion tool, wherein extrusion is divided and fed through the small passage holes of the plate. Since the materials are joined together by compression and extruded from the bearing hole, the flow resistance is made uniform in the width direction of the substrate forming portion of the bearing hole, and the dimension of the bearing hole is accurately reflected and extruded to form a substrate with high flatness. To be done. As a result, the desired flatness can be achieved without post-processing.

The method of manufacturing the profiled member with fins is suitable when aluminum is used as the extruded material. Also,
The finned profile is suitable for a heat sink, and due to the excellent substrate flatness, it is possible to manufacture a heat sink that is in close contact with a heating element and has excellent heat dissipation performance. Further, since no post processing for obtaining flatness is required, an excellent heat sink can be manufactured by a simple process.

Since the heat sink of the present invention is manufactured as described above, it adheres to the heating element and has excellent heat dissipation performance.

[Brief description of drawings]

FIG. 1 shows an embodiment of an extrusion tool according to the present invention,
It is the top view seen from the rear end of the plate.

2 is a sectional view showing an extrusion molding step of a heat sink using the extrusion tool of FIG. 1 in a section taken along line II-II of FIG.

FIG. 3 is a perspective view of the die body as viewed from the rear end side.

FIG. 4 is a perspective view of the plate as viewed from the front end side.

5 is a cross-sectional view showing the extrusion molding process of the heat sink using the extrusion tool of FIG. 1 in a cross section taken along line VV of FIG.

6 is a perspective view of a heat sink manufactured by the extrusion tool of FIG. 1. FIG.

[Explanation of symbols]

1 ... Finned profile (heat sink) 2 ... Substrate 3 ... Fins 10 ... Extrusion tool 20… Dice body 21 ... Bearing hole 22 ... Substrate molding section 23 ... Fin forming part 24 ... Introduction recess 30 ... Plate 31 ... Material passage hole 31a, 31b. 31c, 31d, 31e, 31f ... Small passage holes 32 ... Horizontal bulkhead 33,34 ... Vertical bulkhead 35 ... Inclined surface 37a, 37b ... Crimping space

Claims (11)

[Claims] 1. A number of thin plate fins on one side of a substrate (2)
(3) is an extrusion tool (10) for extruding the fin-shaped shaped members (1) arranged in a comb shape, the substrate forming section (22) corresponding to the substrate (2) and the fins. (3) having a fin forming portion (23) corresponding to, a die body (20) formed with a bearing hole (21) for forming the outer peripheral shape of the finned profile (1), and the die body ( 20), which has a material passage hole (31) which is arranged at the rear of the die, penetrates in the front-rear direction and communicates with the rear end opening of the bearing hole (21) of the die body (20), and the material passage hole (31)
At least one vertical partition wall (33) (34) that crosses the substrate molding portion (22) of the bearing hole (21) in the thickness direction of the substrate (2) in the state of being combined with the die body (20). And the material passage holes (31) are divided into a plurality of small passage holes (31a) (31b) (31c) (31d) (31e) (31f) by the vertical partition walls (33) (34). An extrusion tool comprising a plate (30). 2. The extrusion tool according to claim 1, wherein two or more vertical partition walls (33) (34) are formed in the material passage hole (31) of the plate (30). 3. The plurality of small passage holes (31a) (31b) (31c) in the front part of the material passage hole (31) of the plate (30),
Crimp space (37a) (37b) where (31d) (31e) (31f) communicate with each other
The extrusion tool according to claim 1, wherein the extrusion tool is formed. 4. The vertical partition walls (33) (34) are fin-forming parts (23).
The extrusion tool according to any one of claims 1 to 3, wherein the extrusion tool is formed so as to extend over. 5. The material passage hole (31) of the plate (30) is provided at a boundary portion between the substrate molding portion (22) and the fin molding portion (23) in a combined state with the die body (20). Horizontal bulkhead (3
The extrusion tool according to any one of claims 1 to 4, wherein 2) is formed. 6. The horizontal partition wall (32) is a substrate molding portion at a front portion.
The extrusion tool according to any one of claims 1 to 5, wherein a wall surface on the (22) side is formed on an inclined surface (35) that is inclined forward to the fin forming portion (23) side. 7. The die body (20), wherein the extruded material is communicated with a bearing hole (21) at a rear portion of the die body (20).
An introduction recess (24) leading to (21) is formed.
The extrusion tool according to any one of 1. 8. A large number of thin plate fins on one surface of the substrate (2)
(3) is a method of extrusion-molding fin-shaped shaped members (1) arranged side by side in a comb shape, which is arranged behind the die body (20) and penetrates in the front-back direction to form the die body ( 20) has a material passage hole (31) communicating with the rear end opening of the bearing hole (21), and the material passage hole (31)
At least one vertical partition wall (33) (34) that crosses the substrate molding portion (22) of the bearing hole (21) in the thickness direction of the substrate (2) in the state of being combined with the die body (20). And the material passage holes (31) are divided into a plurality of small passage holes (31a) (31b) (31c) (31d) (31e) (31f) by the vertical partition walls (33) (34). Using an extrusion tool (10) provided with a plate (30), small passage holes (31a) (31b) (31c) (31d) (31) of the plate (30)
e) A method for manufacturing a finned shaped material, characterized in that the extruded materials dividedly supplied through (31f) are joined and pressure-bonded and extruded from the bearing hole (21). 9. The method for manufacturing a profile with fins according to claim 8, wherein the extruded material is aluminum. 10. The method for manufacturing a finned profile according to claim 8, wherein the finned profile is a heat sink. 11. A heat sink manufactured by the method according to claim 10.