JP2017152497A - Manufacturing method of fin joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of fin joint capable of suppressing the number of steps and the number of components.SOLUTION: A manufacturing method has a fin placement step of placing a fin 20 having a plurality of tabular parts 21, placed at a distance from each other, in a mold 60, a plate placement step of placing a plate 30, having brazing material layers 312, 313 on the first outer side face 301 and second outer side face 302, in the mold 60 while abutting the first outer side face 301 against one side of the fin 20, and exposing the second outer side face 302 to a cavity 60C of the mold 60, and a pouring step of feeding molten metal, becoming the material of a heat sink 40, from the gate 60G of the mold 60 to the cavity 60C.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for manufacturing a fin joined body in which fins are joined to a casting through a plate.

  In an electronic device in which an electronic element is mounted on the surface of a substrate, Joule heat is generated in the energized electronic element. If the temperature of the electronic element rises excessively due to this Joule heat, the operation and life of the electronic element may be adversely affected. For this reason, in order to maintain the electronic device at an appropriate temperature, many configurations for dissipating the heat generated by the electronic device to the outside have been proposed.

  For example, Patent Document 1 below describes a part of a power module that includes a substrate, a power device mounted on the substrate surface, a corrugated fin, and the like. In the power module, heat generated by the energized power device is transmitted to the corrugated fins via the substrate or the like, and is dissipated to the cooling medium flowing on the surface of the corrugated fins. Thereby, the excessive temperature rise of a power device is suppressed.

JP 2006-310486 A

  The power module described in Patent Document 1 is configured by bonding corrugated fins to a heat dissipation layer on the surface of a substrate and fixing the substrate to a heat sink. The corrugated fins are joined by brazing, and the substrate is fixed using a spring material or a bolt. That is, prior to fixing the substrate to the heat sink, it is necessary to bond the corrugated fins to the substrate surface.

  In such a power module manufacturing method, a number of processes are required for joining and fixing the components, and components such as a spring material used for fixing are required. For this reason, in the said manufacturing method, there existed a possibility of causing the increase in manufacturing cost.

  This invention is made | formed in view of such a subject, The objective is to provide the manufacturing method of the fin joined body which can suppress the number of processes and the number of components.

  In order to solve the above-mentioned problems, the present invention is a method of manufacturing a fin joined body (10) in which fins (20) are joined to a casting (40) via plates (30), and spaced apart from each other. A fin placement step of placing the fins having the plurality of plate-like portions (21) to be placed on the mold (60), and a brazing material layer (on the first outer surface (301) and the second outer surface (302)). 312, 313) with the first outer surface abutting against one side of the fin and the second outer surface exposed to the cavity (60C) of the mold. And a pouring step of pouring molten metal, which is a material of the casting, from the gate of the mold into the cavity.

  According to this manufacturing method, the plate arranged in the mold comes into contact with the molten metal poured into the cavity in the pouring step. When the plate receives heat from the molten metal, the temperature of the brazing material layer increases. If the temperature of the brazing material layer is raised to the melting point or higher to melt, the brazing material layer can be used for brazing.

  Therefore, according to this manufacturing method, the brazing filler metal layer is melted by the heat of the molten metal, and the joining by brazing the plate and the fin and the joining by brazing the plate and the casting are both performed in the pouring process. Can be done. As a result, the number of processes and the number of parts can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the fin conjugate | zygote which can suppress the number of processes and the number of components can be provided.

It is a schematic diagram which shows a fin integrated heat sink. It is a schematic diagram explaining a fin arrangement | positioning process and a plate arrangement | positioning process. It is an enlarged view of the III section of FIG. It is a schematic diagram which shows the state which has arrange | positioned the plate 30 to the 1st metal mold | die. It is a bottom view which shows the periphery of the plate in the state of FIG. It is a schematic diagram which shows the metal mold | die clamped. It is a schematic diagram explaining a pouring process.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  An outline of the fin-integrated heat sink 10 which is a fin assembly will be described with reference to FIG. FIG. 1 is a cross-sectional view of a predetermined plane intersecting the fin-integrated heat sink 10.

  The fin-integrated heat sink 10 is a component used in an electric compressor that compresses refrigerant in a refrigeration cycle apparatus (not shown). The electric compressor is integrally provided with an electric motor that generates power and an inverter device that converts electric power supplied to the electric motor. The fin-integrated heat sink 10 constitutes a part of this inverter device.

  As shown in FIG. 1, the fin-integrated heat sink 10 includes fins 20, a plate 30, and a heat sink 40.

  The fin 20 is a so-called corrugated fin, and is formed by bending a thin metal plate. The substrate of the thin plate is made of a metal material having a relatively high thermal conductivity such as aluminum or copper. The fin 20 is bent so as to be repeatedly folded at a predetermined width, thereby forming a plurality of plate-like portions 21 that are spaced apart from each other. Further, on the side opposite to the tips of the plurality of plate-like portions 21, a flange portion 22 is formed that protrudes in a direction intersecting with the folding direction of the plate-like portions 21.

  The plate 30 is a plate-like member having a first outer surface 301 and a second outer surface 302 located on the opposite side of the first outer surface 301. The base material of the plate 30 is made of a metal material having a relatively high thermal conductivity, such as aluminum or copper. The thermal expansion coefficient of the metal material is larger than the thermal expansion coefficient of the first mold 61 of the mold 60 described later. The plate 30 abuts on the flange portion 22 and the root portion 23 of the fin 20 on the first outer side surface 301 and is joined by brazing. Further, the plate 30 is disposed so as to cover between the plate-like portions 21 of the fin 20.

  The heat sink 40 is a casting that is molded using a mold. Specifically, the heat sink 40 flows a molten aluminum die-cast material (for example, ADC 12; hereinafter, also simply referred to as “molten metal”) into a cavity 60C (see FIG. 6) of a mold 60 described later, and then cools for a predetermined time. And then solidified. The heat sink 40 includes a bottom portion 41 and a side wall 42 that covers the periphery of the bottom portion 41, and has a container shape as a whole.

  The plate 30 joined to the fin 20 abuts on the bottom 41 of the heat sink 40 at the second outer side surface 302 and is joined by brazing. Thereby, the fin 20 is joined to the heat sink 40 via the plate 30.

  In addition to the heat sink 40, the inverter device includes a substrate for performing power conversion and a large number of electronic elements mounted on the surface of the substrate. The fin-integrated heat sink 10 functions to dissipate heat generated in the energized electronic element to the outside. Specifically, the heat generated in the electronic elements of the inverter device is first transmitted to the fins 20 via the heat sink 40 and the plate 30.

  A cooling refrigerant (not shown) flows on the surface of the plate-like portion 21 of the fin 20. The heat transferred to the fin 20 is transferred from the surface of the fin 20 to the cooling refrigerant flowing between the plate-like portions 21. That is, the fin 20 functions as a member that expands the effective area for heat transfer to the cooling refrigerant. Thereby, heat dissipation of the electronic element by the fin-integrated heat sink 10 is performed, and an excessive temperature rise of the electronic element is suppressed.

  Next, a method for manufacturing the fin-integrated heat sink 10 will be described with reference to FIGS. The manufacturing method of the fin integrated heat sink 10 includes a fin placement step, a plate placement step, a preheating step, and a pouring step. Hereinafter, each process is demonstrated in order.

[Fin placement process]
The fin placement step is a step of placing the fin 20 on the mold 60. The mold 60 includes a pair of a first mold 61 and a second mold (see FIGS. 6 and 7). As FIG. 2 shows, the 1st metal mold | die 61 is exhibiting the container shape by which the downward direction was open | released. A fin arrangement space 612 surrounded by a partition wall 611 is formed inside the first mold 61. A recessed flange fixing groove 611 a and a plate fixing groove 611 b are formed at the lower end of the partition wall 611.

  In the fin placement step, the fins 20 are inserted and placed in the fin placement space 612 of the first mold 61 from below. An oxide film removing agent is applied to the surface of the fin 20 in advance. The fin 20 is fixed to the first mold 61 by fitting the flange portion 22 into the flange fixing groove 611a.

  Prior to the insertion of the fin 20 into the fin arrangement space 612 or simultaneously with the insertion, the support member 70 is inserted between the plate-like portions 21 of the fin 20. The support member 70 includes a plate-shaped base 71 and a plurality of support protrusions 72 protruding from the base 71. The plurality of supporting protrusions 72 are arranged at intervals. The support member 70 is formed of a metal material having a higher melting point and higher rigidity than the base material of the fin 20. A support protrusion 72 of the support member 70 is inserted between the plate-like portions 21 of the fin 20.

[Plate placement process]
The plate arrangement process following the fin arrangement process is a process of arranging the plate 30 on the mold 60. Here, as shown in FIG. 2, the plate 30 is inserted into the plate fixing groove 611 b of the first mold 61 from below.

  FIG. 3 is an enlarged view of a cross section of the plate 30. The plate 30 has brazing material layers 312 and 313 covering the surface of the base material 311 on the first outer surface 301 and the second outer surface 302. As the brazing material, for example, a material containing aluminum alloy, silicon, magnesium, or copper can be used. In order to facilitate understanding, in FIG. 3, the thickness of the brazing material layers 312 and 313 is shown larger than the actual thickness.

  FIG. 4 shows a state where the plate 30 is fitted into the plate fixing groove 611 b of the first mold 61 after the fin placement step. FIG. 5 is a bottom view showing the plate 30 in this state. The plate 30 includes a base portion 31 that has a rectangular shape in a bottom view, and a plurality of insertion protrusions 32 that protrude outward from the peripheral surface of the base portion 31. The plate 30 is fixed to the first mold 61 by the fitting protrusion 32 coming into contact with the plate fixing groove 611b.

  As shown in FIG. 4, when the plate 30 is fitted into the plate fixing groove 611 b, the first outer side surface 301 of the plate 30 comes into contact with the root portion 23 of the fin 20. That is, the brazing filler metal layer 312 on the first outer side surface 301 shown in FIG.

[Preheating process]
In the preheating process following the plate arranging process, the fins 20 and the plate 30 are preheated. Specifically, as shown in FIG. 6, the first mold 61 and the second mold 62 of the mold 60 are clamped, and the plate 30 is inserted into the plate fixing groove 611 b so as to become a substantially closed space. Nitrogen gas is supplied to the fin arrangement space 612. The nitrogen gas is preheated and has a relatively high temperature (however, it is not higher than the melting point of the brazing filler metal layers 312 and 313, for example, about 570 ° C.).

  Various methods of supplying nitrogen gas to the fin arrangement space 612 can be adopted. For example, a hole communicating with the fin arrangement space 612 may be formed in a part of the first mold 61, and nitrogen gas may be allowed to flow from the outside of the first mold 61 through the hole.

  When relatively high-temperature nitrogen gas is supplied to the fin arrangement space 612, the mold 60, the fins 20, and the plate 30 receive heat from the nitrogen gas. That is, the mold 60, the fin 20, and the plate 30 are heated, and their temperatures rise.

  As the temperature rises, the mold 60, the fin 20 and the plate 30 expand. As described above, the base material 311 of the plate 30 is formed of a material having a larger coefficient of thermal expansion than the material of the mold 60. For this reason, the plate 30 tends to expand larger than the first mold 61.

  However, since the plate 30 is fitted in the plate fixing groove 611b, the expansion of the plate 30 is restricted by the plate fixing groove 611b. Due to the restriction of the expansion, the plate 30 abuts the plate fixing groove 611b more strongly at the fitting protrusion 32. As a result, the plate 30 is more firmly fixed to the plate fixing groove 611b.

  Further, as the first mold 61 and the second mold 62 are clamped, a cavity 60 </ b> C is formed inside the mold 60. The cavity 60C is a space that communicates with the gate 60G formed in the second mold 62 and extends from the gate 60G to the side of the partition wall 611 of the first mold 61.

  The plate 30 fitted in the plate fixing groove 611b is in a state where the second outer surface 302 is exposed to the cavity 60C. Further, the plate 30 is in a state of facing the gate 60G. That is, the plate 30 is fixed in a state where the second outer side surface 302 faces the gate 60G.

[Pouring process]
In the pouring process subsequent to the preheating process, as shown in FIG. 7, the molten metal is poured from the gate 60G into the cavity 60C. The temperature of the molten metal to be poured (for example, 630 ° C.) is equal to or higher than the melting point of the brazing filler metal layers 312 and 313 and lower than the melting point of the fins 20 and the base material of the plate 30.

  The molten metal poured into the cavity 60C from the gate 60G comes into contact with the second outer surface 302 of the plate 30 exposed to the cavity 60C. Since the plate 30 is fixed so as to be opposed to the gate 60G, the molten metal poured from the gate 60G comes into contact with the plate 30 before the temperature is almost lowered. Thereby, the plate 30 receives heat from the molten metal.

  The heat transferred from the molten metal to the plate 30 is further transferred from the plate 30 to the fins 20. However, since the fins 20 and the plate 30 are preheated in the preheating process described above, heat transfer from the plate 30 to the fins 20 is relatively light. As a result, the temperature of the plate 30 rises rapidly and reaches the melting point of the brazing filler metal layers 312 and 313 or more, and the brazing filler metal layers 312 and 313 are melted.

  When the temperature of the fin 20 rises and reaches a value close to its melting point, the fin 20 may be deformed. However, each plate-like portion 21 of the fin 20 is supported by a support protrusion 72 that is inserted and arranged between each plate-like portion 21. Thereby, even when the temperature of the fin 20 reaches a value close to the melting point, the interval between the plate-like portions 21 of the fin 20 is maintained.

  Further, as described above, by receiving heat from the nitrogen gas supplied in the preheating step, the plate 30 expands and is firmly fixed in the plate fixing groove 611b. For this reason, even if the molten metal flows in the cavity 60C, the plate 30 does not move with the flow.

  Further, as described above, the plate 30 is disposed so as to cover between the plate-like portions 21 of the fin 20. For this reason, the molten metal does not flow between the plate-like portions 21 in the pouring step.

  When the molten metal reaches the entire cavity 60C, the pouring of the molten metal from the gate 60G is finished. Thereafter, the first mold 61 and the second mold 62 are cooled for a predetermined time in a clamped state, whereby the molten metal is solidified and the heat sink 40 is formed. With the cooling, the molten brazing filler metal layers 312 and 313 are also solidified.

  The brazing material of the solidified brazing material layer 312 functions as a joining material for joining the fin 20 and the plate 30 together. Similarly, the brazing material of the solidified brazing material layer 313 functions as a joining material for joining the heat sink 40 and the plate 30 together. Thereby, joining by brazing of the fin 20 and the plate 30 and joining by brazing of the heat sink 40 and the plate 30 are made.

  The fin-integrated heat sink 10 in which the fins 20 are joined to the heat sink via the plate 30 is obtained by opening the first mold 61 and the second mold 62 and releasing the plate 30 and the heat sink 40. Can do. Here, since the plate 30 is in contact with the plate fixing groove 611b at the plurality of insertion protrusions 32, the plate 30 can be easily released.

  Next, effects obtained based on the manufacturing method according to the present embodiment will be described.

  According to the manufacturing method which concerns on this embodiment, the plate 30 arrange | positioned at the metal mold | die 60 contacts the molten metal poured into the cavity 60C in a pouring process. As the plate 30 receives heat from the molten metal, the temperature of the brazing material layers 312 and 313 rises. If the temperature of the brazing material layers 312 and 313 is raised to the melting point or higher to melt, the brazing material layers 312 and 313 can be used for brazing.

  Therefore, according to the manufacturing method according to the present embodiment, the brazing filler metal layers 312 and 313 are melted by the heat of the molten metal, the joining by the brazing between the plate 30 and the fin 20, and the brazing between the plate 30 and the heat sink 40. It is possible to perform both of the joining in the pouring step. As a result, the number of processes and the number of parts can be suppressed.

  Moreover, according to the manufacturing method according to the present embodiment, the temperature of the molten metal poured into the cavity 60C of the mold 60 in the pouring step is equal to or higher than the melting point of the brazing filler metal layers 312 and 313, and the fin 20 and the plate 30. Less than the melting point of the substrate. Thereby, it is possible to melt the brazing filler metal layers 312 and 313 with the molten metal while suppressing deformation of the fins 20 and the plate 30 and use them for brazing.

  Moreover, according to the manufacturing method which concerns on this embodiment, the plate 30 is arrange | positioned at the metal mold | die 60 so that between the several plate-shaped parts 21 of the fin 20 may be covered in a plate arrangement | positioning process. Thereby, in a subsequent pouring process, it can suppress that a molten metal flows in between each plate-shaped part 21 from the cavity 60C, and can ensure space between each plate-shaped part 21 of the fin 20. FIG. As a result, heat transfer from the plate-like portion 21 of the fin 20 to the cooling refrigerant can be reliably performed.

  By the way, when the temperature of the fin 20 and the plate 30 is low, even if the molten metal is poured into the cavity 60C in the pouring step, the temperature of the plate 30 does not rise sufficiently and the brazing filler metal layers 312 and 313 may not melt. is there. Specifically, even if the plate 30 receives heat from the molten metal, the heat is transmitted from the plate 30 to the fins 20, and the temperature of the brazing material layers 312 and 313 may not exceed the melting point. In this case, the brazing between the plate 30 and the fins 20 and the brazing between the plate 30 and the heat sink 40 cannot be performed properly.

  On the other hand, the manufacturing method according to the present embodiment includes a preheating step for preheating the fins 20 and the plate 30 prior to the pouring step. Thereby, in the pouring process, heat transfer from the plate 30 to the fins 20 can be suppressed, and the temperature of the brazing filler metal layers 312 and 313 of the plate 30 can be reliably set to the melting point or higher. As a result, it is possible to appropriately perform the brazing between the plate 30 and the fin 20 and the brazing between the plate 30 and the heat sink 40.

  Moreover, according to the manufacturing method which concerns on this embodiment, the fin 20 and the plate 30 are preheated by supplying nitrogen gas in a preheating process. Thereby, it becomes possible to preheat both of the fins 20 and the plate 30 while suppressing the formation of oxide films. As a result, it is possible to suppress the brazing between the plate 30 and the fin 20 and the brazing between the plate 30 and the heat sink 40 from being inhibited by the oxide film.

  Moreover, according to the manufacturing method which concerns on this embodiment, the oxide film removal agent is apply | coated to the fin 20 prior to a plate arrangement | positioning process. Accordingly, even when an oxide film is generated on the fin 20 in the preheating step, the fin 20 and the plate 30 can be preheated while removing the oxide film. As a result, it is possible to suppress the brazing between the plate 30 and the fin 20 and the brazing between the plate 30 and the heat sink 40 from being inhibited by the oxide film.

  Moreover, according to the manufacturing method which concerns on this embodiment, the plate 30 is inserted and fixed to the plate fixing groove 611b of the metal mold | die 60 in a plate arrangement | positioning process. As a result, the molten metal is poured into the cavity 60C in the pouring process, and the plate 30 can remain in the plate fixing groove 611b even when the second outer surface 302 exposed to the cavity 60C receives a force from the molten metal. It becomes possible. That is, according to this aspect, it is possible to suppress the movement of the plate 30 with the flow of the molten metal in the cavity 60 </ b> C, and to appropriately join the plate 30 to the fins 20 and the heat sink 40. .

  Moreover, according to the manufacturing method according to the present embodiment, the plate 30 is fixed to face the gate 60G of the mold 60 in the plate arranging step. Thereby, the molten metal poured from the gate 60G can be brought into contact with the plate 30 quickly and reliably, and the temperature of the plate 30 can be raised. As a result, in the pouring step, the brazing material layer 312 on the first outer side surface 301 of the plate 30 and the brazing material layer 313 on the second outer side surface 302 can be reliably melted.

  Further, according to the manufacturing method according to the present embodiment, the plate 30 is formed of a material having a higher thermal expansion coefficient than the material of the mold 60. Accordingly, the plate 30 that has received heat from the molten metal in the pouring step tends to expand more than the mold 60 that has also received heat from the molten metal. However, since the plate 30 is fitted in the plate fixing groove 611b, the expansion of the plate 30 is restricted by the plate fixing groove 611b. That is, the plate 30 is more firmly fixed in the plate fixing groove 611b. Therefore, according to this aspect, it is possible to suppress the movement of the plate 30 with the flow of the molten metal in the cavity 60 </ b> C, and to appropriately join the plate 30 to the fins 20 and the heat sink 40. .

  Moreover, according to the manufacturing method which concerns on this embodiment, the plate 30 has the some protrusion 32 for insertion formed by protrusion. In the plate arranging step, the plate 30 is fixed by contacting the plate fixing groove 611b of the mold 60 at the fitting protrusion 32. Thereby, the fin-integrated heat sink 10 can be easily released from the mold 60 after the heat sink 40 is formed.

  Further, according to the manufacturing method according to the present embodiment, in the fin placement step, the supporting protrusions 72 are inserted between the plurality of plate-like portions 21 from the other side opposite to the one side of the fin 20. Deploy. Thereby, even when the fin 20 becomes high temperature in the pouring process, it becomes possible to maintain the space | interval between each plate-shaped part 21 of the fin 20. FIG.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. Each element provided in each of the specific examples described above and its arrangement, material, condition, shape, size, and the like are not limited to those illustrated, but can be changed as appropriate.

  The above-described embodiment shows an example in which the oxide film removing agent is applied only to the fin 20. However, the present invention is not limited to this. For example, a form in which the oxide film removing agent is applied to the plate 30 instead of the fins 20 and a form in which the oxide film removing agent is applied to the plate 30 in addition to the fins 20 are also included in the scope of the present invention. That is, a manufacturing method in which an oxide film removing agent is applied to at least one of the fin 20 and the plate 30 prior to the plate arranging step is also included in the scope of the present invention.

  The above-described embodiment shows an example in which a so-called corrugated fin is used as a fin that performs heat dissipation. However, the scope of the present invention is not limited to this form. For example, instead of the corrugated fin, a form using a fin formed by connecting a number of members having a T-shaped cross section is also included in the scope of the present invention.

  The above-described embodiment shows an example in which only the plate 30 has the brazing material layers 312 and 313. However, the scope of the present invention is not limited to this form. For example, in addition to the plate 30, a form in which the fin 20 has a brazing filler metal layer on the outer surface contacting the plate 30 is also included in the scope of the present invention. According to this form, it becomes possible to more reliably join the fin 20 and the plate 30 while suppressing the formation of an oxide film. In this embodiment, the temperature of the nitrogen gas supplied to the fin arrangement space 612 in the preheating step needs to be equal to or lower than the melting point of the brazing material of the brazing material layer provided on the fin 20 (for example, about 570 ° C.).

10: Fin integrated heat sink (fin assembly)
20: Fin 21: Plate-shaped part 30: Plate 32: Protrusion 40: Heat sink (casting)
60: Mold 60C: Cavity 60G: Gate 72: Supporting protrusion 301: First outer surface 302: Second outer surface 312, 313: Brazing material layer 611b: Plate fixing groove

Claims (11)

A method for producing a fin joined body (10) in which a fin (20) is joined to a casting (40) through a plate (30),
A fin placement step of placing the fins having a plurality of plate-like portions (21) spaced apart from each other in the mold (60);
The plate having the brazing filler metal layers (312, 313) on the first outer surface (301) and the second outer surface (302) is brought into contact with one side of the fin, and (2) a plate placement step in which the outer side surface is exposed to the cavity (60C) of the mold and placed on the mold;
And a pouring step of pouring a molten metal as a material of the casting from a gate of the mold into a cavity.   The temperature of the molten metal poured into the mold cavity in the pouring step is equal to or higher than the melting point of the brazing filler metal layer and lower than the melting point of the fins and the base material of the plate. Of manufacturing a fin assembly of the present invention.   3. The method for manufacturing a fin joined body according to claim 2, wherein, in the plate arranging step, the plate is arranged in the mold so as to cover between a plurality of plate-like portions of the fin.   The method for manufacturing a fin joined body according to any one of claims 1 to 3, further comprising a preheating step of preheating the fin and the plate prior to the pouring step.   The method for manufacturing a fin joined body according to claim 4, wherein in the preheating step, the fin and the plate are preheated by supplying nitrogen gas.   The manufacturing method of the fin conjugate | zygote of Claim 4 or 5 with which the oxide film removal agent was apply | coated to the said fin and the said plate prior to the said plate arrangement | positioning process.   The method of manufacturing a fin joined body according to claim 3, wherein, in the plate arranging step, the plate is fitted and fixed in a plate fixing groove (611b) of the mold.   The method of manufacturing a fin joined body according to claim 7, wherein in the plate arranging step, the plate is fixed to face the gate (60G) of the mold.   The method for manufacturing a fin joined body according to claim 7, wherein the plate is formed of a material having a thermal expansion coefficient larger than that of the material of the mold. The plate has a plurality of protruding protrusions (32) formed to protrude,
The method of manufacturing a fin joined body according to claim 9, wherein in the plate arranging step, the plate is fixed by contacting the plate fixing groove of the mold at the fitting protrusion.   The method for manufacturing a fin joined body according to claim 3, wherein, in the fin arranging step, the fins are arranged by inserting supporting protrusions (72) between a plurality of plate-like portions of the fin.

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