JP3598407B2 - Method and apparatus for manufacturing heat exchange parts - Google Patents

Description

[0001]
[Object of the invention]
[Industrial applications]
The present invention relates to a method and an apparatus for manufacturing a metal heat exchange part for promoting heat radiation, such as a microprocessor and an inverter.
[0002]
BACKGROUND OF THE INVENTION
As a heat exchange component for electronic components such as an integrated circuit, there is a component having a large number of heat radiation projections formed on a metal substrate, and these projections are used to increase the heat radiation action area.
By the way, as a method of manufacturing such a heat exchange part, a method by plastic working is excellent in precision and production efficiency.
[0003]
As a manufacturing method by plastic working, for example, there is a method disclosed in Japanese Patent Application No. 7-21212 already proposed by the present inventors. As shown in FIG. 12, the starting material (metal material W ') held by the gripping die 4 is pressed by the heat radiation projection forming die 3', and the starting material (metal material W ') is formed in the forming hole 21'. ) Is narrowed down to form a large number of heat radiation projections H2 'on the surface of the substrate portion H1'. If such a heat exchange component manufacturing means is employed, for example, thin and long heat radiation projections H2 'can be formed. .
[0004]
However, as shown in the figure, if there is a joint between the gripping die 4 or the like that supports the starting material (metal material W ') from the side and the heat radiation protrusion forming die 3', the high pressure at the time of pressurization causes The joint is instantaneously somewhat widened to form a gap, in which the starting material (metal material W ') flows during molding, and burrs are generated on the surface of the substrate portion H1' on which the heat radiation projections H2 'are formed. This causes various problems.
That is, in such a state, the lubricant (for example, a Teflon film) applied to the surface of the starting material (metal material W ') is robbed by the burr-shaped portion, and the smooth formation of the heat radiation projection H2' is hindered. There was that. Naturally, if burrs are formed, a step of removing the burrs is required. In addition, the lubricating material is interrupted, so that the material does not sufficiently flow particularly to the heat radiation projections H2 'formed on the outer peripheral side. Is not formed sufficiently high.
[0005]
[Technical items that we attempted to develop]
The present invention has been made in view of such a background, and has a starting material or a starting material on a surface between a heat radiation projection forming die and a gripping die on the side where the heat radiation protrusion H2 'is formed. An attempt was made to develop a method and an apparatus for manufacturing a heat exchange component capable of performing smooth molding without entering the applied lubricant.
[0006]
Configuration of the Invention
[Means for achieving the purpose]
That is, the method for manufacturing a heat exchange component according to claim 1 is a member comprising a base portion and a number of heat radiation projections formed so as to rise from the base portion by plastically deforming a metal block-shaped starting material. When plastically deforming the starting material, a heat-dissipating projection mold having a receiving recess formed by a continuous surface and a plurality of forming holes formed at the bottom of the receiving recess is provided. Using an extrusion die capable of entering the recess and having an inwardly extending holding recess on the extrusion contact surface, applying pressure of the extrusion die to the starting material in the receiving recess, and projecting the heat radiation projection from the base by the forming hole. together to form as, in extrusion contacting surface side in which made as a feature in that as by extrusion in the holding recess a part of the starting material and chucked, promote release.
[0007]
According to a second aspect of the present invention, there is provided an apparatus for manufacturing a heat exchange component, comprising: a base portion; and a plurality of heat-radiating projections formed so as to rise from the base portion by plastically deforming a metal block-shaped starting material. This device is a device for manufacturing a heat-dissipating protrusion having a receiving recess formed by a continuous surface and a plurality of forming holes formed in the bottom of the receiving recess, and is capable of entering the receiving recess. And an extrusion die having an inwardly extending holding recess on the extrusion contact surface, wherein the starting material is pressed by the extrusion die in the receiving recess to project the heat radiation projection from the base by the forming hole. together to form as, in extrusion contacting surface side in which made be characterized by those which is adapted by extrusion in the holding recess a part of the starting material and chucked, promote release.
[0008]
Furthermore, in addition to the requirement of the above-mentioned claim 2 , the apparatus for manufacturing a heat exchange part according to the third aspect further includes a narrowed portion formed in the forming hole and a hole having a larger diameter located deeper than the narrowed portion. And a surplus space that does not come into contact with the tip of the heat radiation projection at the end of molding.
[0009]
Furthermore, the apparatus for manufacturing a heat exchange component according to claim 4 is characterized in that, in addition to the requirements described in claim 2 or 3 , the extruding die is provided with a knock pin that can be protruded and retracted in the holding recess. It consists of.
[0010]
According to a fifth aspect of the present invention, in addition to the requirements of the second, third, or fourth aspect, the pressing surface of the heat-dissipating projection mold includes a partition rib for individually partitioning each forming hole. It is characterized by being formed.
[0011]
Further, in the heat exchange component manufacturing apparatus according to the sixth aspect, in addition to the requirements described in the second, third, or fourth aspect, a guide groove that individually partitions each forming hole is provided on the pressing surface of the heat radiation projection forming die. It is characterized by being formed.
[0012]
Effect of the Invention
According to the method and the apparatus for manufacturing a heat exchange component according to claims 1 and 2, since there is no seam of the mold in the receiving concave portion of the heat radiation projection molding die, a part of the starting material on the side where the heat radiation projection is molded is formed. No burrs are formed on the surface of the substrate portion on which the heat radiation projections are formed. Therefore, there is no need for a step of removing the burrs at this portion later, and the starting material surface that is deformed without breaking and breaking the lubricant (lubricating film) on the starting material surface on the side where the heat radiation projections H2 are formed. You can always stay at As a result, the starting material flows and deforms so as to be surely formed so as to form the heat radiation projections, and there is no problem that the heat radiation projections on the outer peripheral side are formed low. Although burrs may be formed on the surface of the substrate portion where the heat radiation projections are not formed, the burrs formed on this side hardly affect the heat radiation projections formed without interrupting the lubricant. Furthermore, since the holding recess is formed on the extrusion contact surface of the extrusion die, a part of the starting material is filled in the holding recess at the time of molding, and the formed product material is gripped. Therefore, a separate chucking device or the like for gripping the product material is not required to release the formed product material from the heat radiation protrusion forming die.
[0013]
According to the heat exchange component manufacturing apparatus of the third aspect, only the narrowed portion in the forming hole is a starting material, a product material, and an intermediate material from the starting material to the product material (hereinafter, these are not particularly distinguished and pointed out). In this case, the expanded portions do not come into contact with each other, and the expanded portions do not come into contact with each other. Therefore, the resistance received from the metal material during the formation of the heat radiation projection is much smaller than that of the conventional plastic working. Therefore, it is also possible to plastically form a large number of elaborate heat radiation projections per unit area, such as those having a thin and complicated cross section on the substrate. In addition, since the molding hole of the heat radiation projection mold has an extra space where the tip of the heat radiation projection does not come into contact at the end of molding, a large molding process is required for the heat radiation projection that is formed slowly as in the conventional closed mold method. No pressure is required, the heat radiation projections other than the heat radiation projections that are formed late are not unnecessarily filled and adhered, and the load on the mold member is small. In addition, there are no problems such as the volume error and the material hardness of the starting material, the manufacturing error of the heat radiation projection molding die and the like, and the unevenness of the lubricating film for molding.
[0014]
According to the heat exchanging part manufacturing apparatus of the fourth aspect , since the push-out die is provided with the knock pin which can be protruded and retracted in the holding recess, the product material can be easily formed by causing the knock pin to protrude and retract in the holding recess. It can be released from the extrusion mold.
[0015]
According to the apparatus for manufacturing a heat exchange component according to the fifth aspect, since the partition ribs for individually separating these are formed on the periphery of each forming hole in the pressing surface of the heat radiation projection forming die, the starting material is formed of a resistance. It does not flow irregularly toward the few forming holes. Therefore, the length of the heat radiation projection does not become uneven.
[0016]
According to the heat exchanging part manufacturing apparatus of the sixth aspect, since the guide groove for individually partitioning the forming holes is formed in the peripheral surface of each forming hole in the pressing surface of the heat radiation projection forming die, the pressing surface is flat. The flow of the lubricant provided on the surface of the starting material is regulated overall as compared with that of the starting material. Also, since the lubricant gradually moves on the guide inclined surface of the guide groove and is sent out into the forming hole, especially when forming a long heat radiation projection, it flows too much into the forming hole at the beginning of molding, and there is insufficient lubrication before completion of forming. There is no such thing. Therefore, the molding of the heat radiating projection is always performed smoothly from the initial stage to the completion of the molding, and the length of the heat radiating projection does not become uneven.
[0017]
【Example】
Hereinafter, a method and an apparatus for manufacturing a heat exchange component of the present invention will be specifically described with reference to the drawings. In the following description, first, the heat exchange component H manufactured according to the present invention will be described, and then the heat exchange component manufacturing apparatus 1 of the present invention used to form such a heat exchange component H will be described. I do. After that, the method of manufacturing the heat exchange component of the present invention will be described while explaining the use state of the heat exchange component manufacturing apparatus 1.
Note that, in the present invention, a metal material that has not been molded at all in the heat exchanging part manufacturing apparatus 1 is a starting material W ₀ , a metal material being processed is an intermediate material W ₁ , and a metal material at the time when molding is completed. It was defined as the product material W _2, and collectively referred to as metal material W when not be distinguished all these particular. The appropriately trimmed the upper end of the heat dissipation protrusions H2 of the product material W _2, that has been subjected to a surface treatment anodized or plated like the whole, and a heat exchange part H of the present invention what remains of the product material W ₂ Define.
[0018]
First, FIG. 1 shows the state of use of the heat exchange component H. The electronic component E, which generates a large amount of heat, is mounted on the wiring board B while supported by the board portion H1. As described above, the heat exchange component H supports the electronic component E, thereby radiating heat generated from the electronic component E to cool the electronic component E.
[0019]
To describe the heat exchange component H in detail, as shown in FIGS. 2 and 3, a large number of cylindrical heat radiation projections H2 are plastically formed on a rectangular substrate portion H1 so as to rise almost vertically. The heat exchange component H is made of a metal material whose main component is aluminum, and the surface of the substrate portion H1 on which the heat radiation projections H2 are formed is 60 mm long, 60 mm wide and 3600 mm ² in area. Further, the diameter of the heat radiation projection H2 is 0.8 mm, the length is 25 mm, and 625 of 25 × 25 are formed on the substrate portion H1, and the total surface area of the 625 is about 40000 mm ² . Therefore, the surface area of the heat radiation protrusion H2 is about 11 times the area of the surface of the substrate portion H1 on which the heat radiation protrusion H2 is formed.
As described above, since the number of the heat radiation projections H2 per unit area is large and the surface area is large, the heat exchange component H has a large heat radiation action area. Therefore, the heat dissipating action of the supported electronic component E is very excellent.
[0020]
Next, the heat exchange component manufacturing apparatus 1 of the present invention will be described. Manufacturing apparatus 1 of the heat exchange part is formed by including the extrusion die 2 for extruding the starting material W ₀ as shown in FIG. 4 (a), and a heat dissipation protrusions mold 3 for molding the heat dissipation protrusion H2.
First, the heat radiation projection molding die 3 will be described. Radiating projections mold 3 has a receiving recess 3a receiving the starting material W ₀ within a number of molded hole 21 is drilled in the bottom of the receiving recess 3a. As a feature of the present invention, the receiving concave portion 3a is formed of a continuous surface having no joint between the molds. When the receiving recess 3a is formed on a continuous surface, the heat radiation projection forming die 3 may be integrally formed, or a plurality of separate blocks may be fixedly connected without gaps and formed. Good.
[0021]
The molding hole 21 will be described. Molded hole 21 is first side abutting on the starting material W ₀ as shown in the enlarged view of FIG. 4 (c) (upward in FIG. 4 (a)), circular for setting the diameter of the heat dissipation protrusions H2 The aperture portion is 21A. A deeper portion (lower portion in FIG. 4A) of the narrowed portion 21A is an expanded portion 21B having a larger hole diameter than the narrowed portion 21A. In this embodiment, the shape of the narrowed portion 21A is circular in accordance with the shape of the heat radiation projection H2 of the heat exchange component H shown in FIGS. Various modifications may be made accordingly.
[0022]
As shown in FIG. 4B, partition ribs 23 are formed on the pressing surface 22 on the peripheral edge of the molding hole 21 of the heat radiation projection molding die 3 to individually partition these molding holes 21. The partition ribs 23, a portion of the starting material W ₀ and intermediate material W ₁ to each of the forming hole 21 to flow evenly. By providing such a partition ribs 23, is restricted nature flows towards less resistive starting material W ₀ and intermediate material W _1, is aligned length of the heat dissipation protrusions H2.
[0023]
In the case of molding of H2 long radiating projection lengths, a large amount of flow to the starting material W ₀ of the forming hole in lubricant during molding initial coated on the surface 21, smoothly late molding becomes insufficient lubrication before completion molding Molding was not performed. Therefore, in such a case, as shown in FIG. 5, a guide groove 25 for individually partitioning the molding holes 21 may be formed in the pressing surface 22 around the molding holes 21 of the heat radiation projection molding die 3. . In addition, it is preferable that the inclination angle of the guide inclined surface 25a of the guide groove 25 is set within a range of 1 to 5 degrees.
If you leave forming such guiding groove 25, lubricant is first compared the pressing surface 22 is assumed flat, uneven flow is restricted to the starting material W ₀ and molding hole 21 of the intermediate material W ₁ . Since the lubricant gradually rises on the guide inclined surface 25a of the guide groove 25 and is sent out into the forming hole 21 together with the pressurization, particularly when the long heat radiation projection H2 is formed, the lubricant excessively flows into the forming hole 21 at the initial stage of forming. Insufficient lubrication does not occur before molding is completed. Therefore, the molding of the heat radiation projection H2 is always smoothly performed from the initial stage to the completion of molding, and the length of the heat radiation projection H2 does not become uneven.
[0024]
Next, the extrusion die 2 will be described. The extrusion die 2 is fitted into the receiving recess 3 a of the heat radiation projection molding die 3 to narrow a part of the starting material W ₀ into the molding hole 21. As shown in FIG. 4A, a dovetail-shaped holding recess 10a is formed on the extrusion contact surface 10 of the extrusion die 2. By the holding recess 10a is a part of the starting material W ₀ is filled during molding, the product material W ₂ is gripped after molding. Do not require such additional chucking device for performing the release of the product material W ₂ from the for radiating projections mold 3.
Further and to release the gripped product Material W ₂ from the extrusion die 2, freely knock pin 11 is provided haunt in the holding recess 10a by a cylinder or the like.
Note The above holding recesses 10a, in addition to those of the dovetail groove shape of FIG. 4 (a), be those capable of various application of a shape comprising an inner spreading shape, as product material W ₂ is gripped, for example, FIG. An inverted truncated cone shape as shown in FIG. Also, as shown in FIG. 6B, a plurality of such holding concave portions 10a may be provided.
[0025]
The heat exchange component manufacturing apparatus 1 of the present invention has the above-described configuration. Hereinafter, the method of manufacturing the heat exchange component of the present invention will be described while describing the state of use.
(I) Before starting molding (starting material W ₀ )
First, as shown in FIG. 7 (a), placing the starting material W ₀ of the block-shaped made of aluminum radiator projections mold 3 in the receiving recess 3a.
[0026]
(Ii) During forming (starting material W ₀ → intermediate material W ₁ )
Then, the extruding die 2 is pressed against the starting material W ₀ while being fitted into the receiving concave portion 3 a of the heat radiation projection forming die 3 to compress the starting material W ₀ . Then, the starting material W ₀ is partially deformed so as to be squeezed into the forming hole 21 of the heat radiation projection forming die 3, and is formed into the intermediate material W ₁ as shown in FIG. 7B. Note radiator has a protrusion receiving recess 3a of the mold 3 has a continuous surface, there is no mold seam, there is no fact that part of the lubricating material and the starting material W ₀ flows, forming a very It is smooth, and burrs do not occur on the surface of the substrate portion H1 where the heat radiation projections H2 are formed. Therefore, a portion of the metal material W on which the heat radiation protrusion H2 is to be formed or the lubricant is not removed from the burrs, and the height of the heat radiation protrusion H2 does not become significantly uneven. In addition, a uniform amount of the metal material W flows into each forming hole 21 by the partition ribs 23 on the peripheral edge of the forming hole 21. Although burrs may be formed on the surface of the substrate portion H1 where the heat radiation projections H2 are not formed, the burrs generated on this side hardly affect the heat radiation projections H2 formed without interrupting the lubricant. Not.
[0027]
(iii) completion of molding (intermediate material W ₁ → product Material W ₂₎
And further intermediate material W ₁ is the heat dissipation protrusions H2 moves downward while cross-section is formed in a substantially circular shape by the diaphragm portion 21A is gradually formed, shaping the product material W ₂ as shown in FIG. 7 (c) Is done. In addition, the deeper part of the narrowed part 21A is an expanded part 21B, which does not contact when the heat radiation projection H2 is formed upward, so that the resistance during processing is small.
On the other hand, by being pressed by the extrusion die 2, a part of the upper portion of the intermediate material W ₁ also moves so as to be pushed out to the holding concave portion 10 a of the extrusion die 2, and chucks the product material W ₂ and the extrusion die 2. A state is obtained. Note that the pressure of the pressing die is set so that any one end of the large number of heat radiation protrusions H2 does not contact the deepest part of the expanded portion 21B of the heat radiation protrusion molding die 3.
[0028]
(iv) Release of heat radiation protrusion mold (product material W ₂ )
When the heat radiation projections H2 are formed as described above, the extrusion die 2 is lifted upward as shown in FIG. Then, since the product material W ₂ is gripped by the holding recess 10 a, the product material W ₂ is simultaneously lifted and released from the heat radiation projection forming die 3.
Since the heat radiation projection molding die 3 is in contact with the heat radiation projection H2 only at the throttle 21A, the mold can be released very smoothly with low resistance, and the heat radiation projection H2 may be broken. Nor.
[0029]
(V) Extrusion mold release (product material W ₂ → heat exchange part H)
Then, as shown in FIG. 8 (b), the product material W ₂ is released from the extrusion die 2 by pushing the knock pin 11 downward.
And thus trimmed appropriately heat dissipation protrusion upper end of the H2 product material W ₂ taken out to obtain a heat exchange part H by performing a surface treatment of the anodized aluminum or plating throughout.
[0030]
[Other embodiments]
The present invention is based on the above, and the following modifications can be made.
<Other reference forms of heat exchange parts>
First, another embodiment of the heat exchange component H will be described. That is, the planar shape of the substrate portion H1 may be rectangular, circular, polygonal, or other various shapes, or may be a flat shape, a bent shape, or any other appropriate three-dimensional shape. The shape may be acceptable.
Further, the shape of the heat radiation projection H2 may be not only a columnar shape but also an appropriate shape such as a prismatic shape, a wing plate shape, a corrugated plate shape as shown in FIGS. 9 (a), 9 (b) and 9 (c). Further, a radiating fin H2a may be formed such that fins H2a are radially formed on the peripheral edge of a cylindrical main body as shown in FIG. 10 and a core hole H2b passes through the center. When the heat radiating protrusion H2 is formed in this manner, the heat radiating effect area is extremely large because the inner area in the core hole H2b is added to the outer area of the heat radiating protrusion H2. By flowing a fluid, for example, into the core hole H2b, the heat exchange rate can be further increased as compared with the natural heat radiation. FIG. 9D shows a heat exchange component H in which a heat radiation protrusion H2 at the outer peripheral end is formed in a shell-like cross section so as to easily receive air inward.
[0031]
<Other Embodiments of Method and Apparatus for Manufacturing Heat Exchange Parts>
Next, another embodiment of a method of manufacturing a heat exchange component and a manufacturing apparatus will be described. FIG. 11 (a) shows a heat exchange component manufacturing apparatus 1 for forming the heat exchange component H of FIG. This is composed of an extrusion die 2 and a heat radiation projection molding die 3 as in the basic embodiment. As a feature of this embodiment, a plurality of core hole forming pins 24 stand in the plurality of forming holes 21 in the heat radiation protrusion forming die 3. The extrusion die 2 is provided with a plurality of holding recesses 10a between the core hole forming pins 24, and is provided with knock pins 11 which can come and go in the holding recesses 10a. The shape of the molding hole 21 of the heat radiation projection molding die 3 corresponds to the shape of the heat radiation projection H2 as shown in FIGS. 11B and 11C.
To form the heat exchanging part H as shown in FIG. 10 by using the manufacturing apparatus 1 of such a heat exchanger component is first used which has a large number of through holes W ₀ a as a starting material W _0. Then, the starting material W ₀ is fitted into the core hole forming pin 24 in the through hole W ₀ a and placed on the receiving recess 3 a. Then after forming the heat dissipation protrusion H2 is pressed against the extrusion die 2 as in the basic embodiment described above the starting material W _0.
[0032]
【The invention's effect】
According to the method and the apparatus for manufacturing a heat exchange component according to the first and second aspects, since the receiving concave portion 3a of the heat radiation projection forming die 3 does not have a die _joint, a part of the starting material W0 is partially joined with the die. the flow, there is no such thing as burr occurs on the periphery of the product material W ₂ which has been formed. Therefore do not require the step of removing after the burr of this site, lubricant starting material W ₀ surface on which the heat dissipation protrusion H2 is molded (lubricating film) without refer interrupted by breaking, starting to be deformed it is possible to be always allowed to remain on the material W ₀ surface. As a result, the starting material W ₀ flows and deforms so as to be surely formed so as to form the heat radiation protrusion H2, and there is no problem that the heat radiation protrusion H2 on the outer peripheral side is formed low. Furthermore, in the extrusion contact surface 10 of the extrusion die 2, because the inversely tapered holding recess 10a in the outlet direction of the product material W ₂ is formed, a part of the starting material W ₀ during molding the holding recesses 10a is filled in, the product material W ₂ is gripped molded. Accordingly, although to release the product material W ₂ molded from the heat dissipation protrusions mold 3 does not need a separate like chucking apparatus for gripping a product material W _2.
[0033]
According to the heat exchange component manufacturing apparatus of the third aspect, only the narrowed portion 21A in the forming hole 21 comes into contact with the metal material W and the expanded portion 21B does not come in contact with the metal material W at the time of forming the heat radiation projection H2. The resistance received is very low compared to conventional plastic working. Therefore, a large number of elaborate heat radiation protrusions H2 such as those having a thin and complicated cross section with respect to the substrate portion H1 can be plastically formed per unit area.
Further, the molding hole 21 of the heat radiation projection molding die 3 has an extra space where the tip of the heat radiation projection H2 does not abut at the end of molding. For this reason, a large molding pressure is not required for the heat-dissipating protrusions H2 formed late, unlike the conventional closed mold method, and the heat-dissipating protrusions H2 other than the heat-dissipating protrusions H2 formed late are unnecessarily filled and adhered. And the load on the mold member is small. Further, the volume error and the material hardness of the starting material W ₀ , the production error of the heat radiation projection molding die 3 and the like, and the unevenness of the lubricating film for molding do not cause any problems as compared with the related art.
[0034]
According to the heat exchange component manufacturing apparatus of the fourth aspect , since the push pin 2 is provided with the knock pin 11 which can be moved into and out of the holding recess 10a, the knock pin 11 can be moved into and out of the holding recess 10a. it can be released from the product material W ₂ easy extrusion die 2.
[0035]
According to the apparatus for manufacturing a heat exchange component according to the fifth aspect, since the partition ribs 23 for individually partitioning the molding holes 21 on the pressing surface 22 of the heat radiation projection molding die 3 are formed on the peripheral edge of the molding holes 21. The material W ₀ does not flow irregularly into the molding hole 21 having a small resistance. Therefore, the lengths of the heat radiation protrusions H2 do not become uneven.
[0036]
According to the heat exchanging part manufacturing apparatus of the sixth aspect, since the guide groove 25 for individually partitioning the molding holes 21 in the pressing surface 22 of the heat radiation projection molding die 3 is formed at the peripheral edge of the molding hole 21. plane flow of lubricant provided on the surface of the starting material W ₀ are totally restricted compared to that flat. Further, since the lubricant gradually moves on the guide inclined surface 25a of the guide groove 25 and is sent out into the forming hole 21, especially when the long heat radiation projection H2 is formed, the lubricant flows too much into the forming hole 21 at the initial stage of forming, and the molding is performed. There is no shortage of lubrication before completion. Therefore, the molding of the heat radiation projection H2 is always smoothly performed from the initial stage to the completion of molding, and the length of the heat radiation projection H2 does not become uneven.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a use state of a heat exchange component manufactured by the present invention.
FIG. 2 is a perspective view showing a heat exchange component manufactured according to the present invention.
FIG. 3 is a plan view of the same.
4 is a vertical sectional front view showing longitudinal sectional front view and an enlarged drawing b unit及beauty c section showing an apparatus for manufacturing a heat exchange part of the present invention.
FIG. 5 is a vertical sectional front view showing an embodiment in which a guide groove is formed on the pressing surface.
FIG. 6 is a longitudinal sectional perspective view and a bottom view showing two examples in which the shape and arrangement of the holding recesses are different.
FIG. 7 is a longitudinal sectional front view showing a stepwise process from the start of molding to the end of molding in the method for manufacturing a heat exchange component of the present invention.
FIG. 8 is a vertical sectional front view showing the state of release from the heat radiation projection molding die and the state of release from the extrusion die.
FIG. 9 is a perspective view and a plan view showing various reference embodiments in which the cross-sectional shapes of the heat radiation projections are different.
FIG. 10 is a perspective view showing still another reference embodiment of the present invention.
FIG. 11 is a longitudinal sectional front view showing another embodiment of the apparatus for manufacturing a heat exchange component of the present invention, a longitudinal sectional front view showing an enlarged part b in FIG. 11, and a cross-sectional plan view taken along line cc.
FIG. 12 is a longitudinal sectional front view showing a problem when a conventional heat exchange component manufacturing apparatus is used.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 Heat exchange component manufacturing device 2 Extrusion die 3 Heat radiation projection molding die 3a Receiving recess 4 Gripping die 10 Extrusion contact surface 10a Holding recess 11 Knock pin 21 Molding hole 21A Narrowing portion 21B Expanding portion 22 Pressing surface 23 Partition rib 24 Core hole Forming pin 25 Guide groove 25a Guide inclined surface B Wiring board E Electronic component H Heat exchange component H1 Board portion H2 Heat radiating protrusion H2a Fin H2b Core hole W Metal material W ₀ Starting material W ₀ a Through hole W ₁ Intermediate material W ₂ Product material

Claims (6)

A method of manufacturing a member having a base portion and a large number of heat radiation projections formed so as to rise from the base portion by plastically deforming a metal block-shaped starting material, wherein the starting material is plastically deformed. In doing so, a heat sinking projection mold having a receiving recess formed of a continuous surface and a number of forming holes drilled at the bottom of the receiving recess, and an inwardly extending shape that can enter the receiving recess and extend into the extrusion contact surface. Using an extrusion die having a holding concave portion, applying a pressure of the extrusion die to the starting material in the receiving concave portion to form a heat radiation projection so as to protrude from the base by a forming hole , and at the extrusion contact surface side, the starting material A method for manufacturing a heat exchange component, characterized in that a part is extruded into a holding recess to form a chucking state and release is performed . This is a device for plastically deforming a metal block-shaped starting material to produce a member having a base portion and a large number of heat radiation protrusions formed so as to rise from the base portion. A heat-dissipating projection mold having a receiving recess formed therein and a number of forming holes drilled in the bottom of the receiving recess; and an extrusion having an inwardly extending holding recess which can enter the receiving recess and has an extruding contact surface. become comprises a mold, relative to the starting material, in addition to press the extrusion die in the receiving recess, the heat dissipation projection by molding hole with is formed so as to protrude from the base, the starting material is extruded contact surface heat exchange parts of the manufacturing apparatus, characterized in that part by extrusion in the holding recess and chucked, is obtained so as to achieve release. The forming hole is composed of a constricted portion and an expanded portion located deeper in the constricted portion and having a larger hole diameter than the constricted portion, and has an extra space in which the tip of the heat radiation projection does not contact at the end of the forming. The apparatus for producing a heat exchange component according to claim 2, wherein: The heat exchanging part manufacturing apparatus according to claim 2 , wherein the extrusion die is provided with a knock pin that can be protruded and retracted in the holding recess. 5. The heat exchange component manufacturing apparatus according to claim 2 , wherein a partition rib for individually partitioning each forming hole is formed on a pressing surface of the heat radiation projection forming die. 5. The heat exchange component manufacturing apparatus according to claim 2 , wherein a guide groove which individually partitions each forming hole is formed on a pressing surface of the heat radiation projection forming die.

Images