Method for joining different types of materials

Abstract

Method for joining different types of materials of a metal material (3) and a composite material (1) having a connection hole (5) using a device (100) comprising: a frame (20) having a first free end (21) and a second free end (22) opposite each other; a laser head (30) provided at the first free end (21) of the frame (20) and emitting a laser beam (31) to a joining point of the metal material (3); an upper tool (40) which is intended to move back and forth on the first free end (21) of the frame (20) and to exert pressure on the metal material (3); a lower tool (60) which is intended to be attached to the second free end (22) of the frame (20) so that it corresponds to the upper tool (40) and supports a connection point of the composite material (1); and an air suction element (80) connected to the lower tool (60) for sucking air between the lower tool (60) and the connecting hole (5) of the composite material (1); and the method comprising the steps of: (a) providing the metal material (3) and the composite material (1) having the connection hole (5) formed at the connection point of the composite material (1); (b) arranging the composite material (1) and the metal material (3) overlapping each other on the lower tool (60) to support the joining point of the composite material (1) by the lower tool (60); (c) moving the upper tool (40) forward to apply pressure to the joining point of the metal material (3); (d) radiating the laser beam (31) through the laser head (30) to the joining point of the metal material (3) to form a fusion portion (91); (e) sucking the air through the lower tool (60) to introduce the melting portion (91) into the connecting hole (5) of the composite material (1); and (f) cooling the melting section (91) by the lower tool (60) and bonding the composite material (1) and the metal material (3) together using the melting section (91).

Description

TECHNICAL FIELD

[0001] An exemplary embodiment of the present invention relates to a method for joining different types of materials, and more particularly to a method for joining different types of materials that joins different types of materials of a composite material and a metal material. STATE OF THE ART

[0002] In recent years, composite materials have been developed that combine the strength of metal with the lightweight and formability of plastic. Examples of such composite materials include fiber-reinforced plastics (FRP) and carbon fiber-reinforced plastics (CFRP).

[0003] Such a composite material is a boundary composite material known as a lightweight structural material with high strength and high elasticity. It uses fibers (carbon fibers) as a reinforcing material, and exhibits excellent properties as such a lightweight structural material. Due to these properties of the composite material, a large number of products have been manufactured using a mixture of the composite material and a metal material. A method for strongly bonding the metal material and the composite material is essential for manufacturing such products.

[0004] Technologies for processing composite materials and forming products have been actively used, but a method for joining different types of materials, such as a composite material and a metal material, has only recently been developed. As a representative method for joining different types of materials, such as a composite material and a metal material, a method for mechanically joining the composite material and the metal material using a general rivet, a self-piercing rivet, or a bolt is mentioned.

[0005] However, compared with a welding method, such a joining method has the weakness that manufacturing costs increase, an appearance quality of a joined article deteriorates, investment costs increase due to a change in a joining facility and a manufacturing environment due to changes in joining materials, and the structure of a joining facility is complicated.

[0006] An example of a previously known, conventional method for joining different types of materials can be found, among others, in DE 10 2011 050 832 A1.

[0007] The above information disclosed in this prior art section is intended only to enhance the understanding of the background of the invention and may therefore contain information which does not constitute the prior art already known to a person skilled in the art in this country. DESCRIPTION OF THE INVENTION

[0008] The present invention provides a method for joining different types of materials, which has the advantages that different types of materials of a metal material and a composite material can be joined by a laser welding method with a simple configuration.

[0009] According to an exemplary embodiment, a device for joining different types of materials is provided, which is configured to join a metal material and a composite material with a joining hole. The device comprises a frame with first and second free ends that are opposite to each other. A laser head is provided at the first free end of the frame and emits a laser beam to a joining point of the metal material. An upper tool is configured to reciprocate at the first free end of the frame and apply pressure to the metal material. A lower tool is attached to the second free end of the frame to correspond with the upper tool and support a joining point of the composite material. An air suction element is connected to the lower tool to suck air between the lower tool and the joining hole of the composite material.

[0010] The frame can be attached to and / or detached from a robot arm using a mounting bracket.

[0011] The frame can be a C-type frame and be provided on the mounting bracket.

[0012] The laser head can be positioned on the mounting bracket so that it corresponds to the upper tool.

[0013] At least one working cylinder for reciprocating the upper tool may be provided on the mounting bracket. The working cylinder may have a working rod, which may be connected to the upper tool.

[0014] A laser beam irradiation path through which the laser beam passes may be formed inside the upper tool and a pressing end for applying pressure to the joining point of the metal material may be formed on the upper tool.

[0015] A first cooling water circulation path which circulates cooling water may be formed on the upper tool.

[0016] An air discharge path which discharges air may be formed within the lower tool and a support end for supporting the joining point of the composite material may be formed on the lower tool.

[0017] A second cooling water circulation path which circulates cooling water may be formed on the lower tool.

[0018] A sealing member that blocks a gap between the support end and the composite material may be formed on the support end of the lower tool.

[0019] The air intake element may include a vacuum pump connected to the air discharge path.

[0020] According to an exemplary embodiment of the present invention, a method for joining different types of materials includes providing the metal material and the composite material having the connection hole formed at the connection point. The composite material and the metal material, which overlap with each other at the lower die, are arranged so that the connection point of the composite material is supported by the lower die. The upper die moves forward to apply pressure to the connection point of the metal material. The laser beam is irradiated from the laser head toward the connection point of the metal material to form a fused portion. Air is sucked through the lower die to introduce the fused portion into the connection hole of the composite material.The melting section is cooled by the lower tool, thereby bonding the composite material and the metal material together using the melting section.

[0021] During the blasting step, cooling water can be circulated into the upper tool to cool an area around the molten section at the junction point of the metal material.

[0022] During the cooling step, cooling water can be circulated into the lower tool to cool the melt section.

[0023] In the suction step, a filler metal may be filled into a base material loss portion of the metal material connection point.

[0024] In the cooling step, the melt portion may be cooled and contracted to allow the composite material and the metal material to be united.

[0025] Carbon fiber reinforced plastic (CFRP) can be used as a composite material.

[0026] According to the exemplary embodiment of the present invention, it is possible to integrally unite different kinds of materials of the composite material and the metal material by a contraction force generated by cooling the molten portion by forming the molten portion at the connection point of the metal material by a laser welding method and introducing the molten portion into the connection hole of the composite material by the air suction pressure.

[0027] Accordingly, in the exemplary embodiment of the present invention, it is possible to join different types of the composite material and the metal material while minimizing a change in a joining facility and a manufacturing environment without requiring a separate medium such as a rivet or a bolt.

[0028] Therefore, in the exemplary embodiment of the present invention, compared with a prior art rivet joining method, it is possible to reduce manufacturing costs and achieve excellent appearance quality of a joined article. Furthermore, it is possible to reduce investment costs for a joining facility and a manufacturing environment caused by changes in joining materials, and to simplify the structure of the joining facility. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings are intended to show exemplary embodiments of the present invention, so that the technical teaching of the present invention should not be interpreted as being limited to the accompanying drawings. Fig. 1 is a perspective view of an apparatus for joining different types of materials according to an exemplary embodiment. Fig. 2 is a schematic cross-sectional view of the apparatus for joining different types of materials according to an exemplary embodiment. Fig. 3A to 3F are diagrams for describing an operation of the apparatus for bonding different kinds of materials and a method for bonding different kinds of materials according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present invention will be described more fully below with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As will be apparent to those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention as defined by the appended claims.

[0031] Inessential parts are omitted in order to clearly describe the present invention, and the same or similar configuration elements are designated by the same reference numerals throughout the description. In the drawings, sizes and thicknesses of components are arbitrarily shown for convenience of description, so the present invention is not necessarily limited to the drawings. The thicknesses thereof are shown in bold to clearly show different portions and regions. Furthermore, the terms "first", "second", etc., given to components having the same configuration, are used in the following detailed description merely to distinguish one component from another, and the designations do not necessarily specify an order in the following detailed description.

[0032] Throughout the specification, unless explicitly stated to the contrary, the word "comprise" and various variations thereof, such as "comprises" or "comprising," are understood to include the listed elements, but not to exclude other elements. Furthermore, the words "...unit," "...means," "...part," "element," etc., mentioned in the specification refer to a unit having a comprehensive configuration to perform at least one function or operation.

[0033] Fig. 1 is a perspective view of an apparatus for joining different types of materials according to an exemplary embodiment, and Fig. 2 is a schematic cross-sectional view of an apparatus for joining different types of materials according to an exemplary embodiment. Referring to Fig. 1 and Fig. 2, an apparatus 100 for bonding different types of materials according to an exemplary embodiment may be used for a vehicle body component assembly process for assembling vehicle body assembly components, such as vehicle body panels.

[0034] To reduce the weight of a vehicle body panel in the vehicle body component assembly process, the multi-material bonding apparatus 100 according to an exemplary embodiment is configured to integrally bond the multi-material types of a composite material 1 and a metal material 3. For example, the composite material 1 may include fiber-reinforced plastic (FRP) and carbon fiber-reinforced plastic (CFRP).

[0035] The composite material 1 is a boundary composite material known as a lightweight structural material with high strength and high elasticity, and uses fibers as a reinforcing material, exhibiting excellent properties as a lightweight structural material. Furthermore, because the composite material 1 has high strength, the elastic modulus and cyclic fatigue behavior are more excellent than those of a steel material, and a thermal expansion coefficient is also lower than that of the steel material. The composite material exhibits properties such as excellent dimensional stability, electrical conductivity, corrosion resistance, and vibration damping performance. Here, the composite material 1 can be manufactured by laminating a plurality of material layers, immersing resin, such as epoxy resin, in a (carbon) fiber material, and then curing the resin.

[0036] The metal material 3 may include a general steel plate, stainless steel, an aluminum material, and a non-ferrous alloy material. Furthermore, a connection hole 5 is formed at a connection point of the composite material 1 where the composite material 1 and the metal material 3 are connected to each other.

[0037] The following configuration elements will be described when the connecting device 100 stands in an up-and-down direction as shown in the drawings, with a back-and-forth direction being defined as the up-and-down direction. Furthermore, in an exemplary embodiment of the present invention, it has been described that the composite material 1 and the metal material 3 are integrally bonded to each other while the metal material 3 is laminated on an upper surface of the composite material 1. However, the definition of the direction is merely a relative term, and since the direction may change depending on a bonding direction and a reference position of the connecting device 100, the reference direction is not necessarily limited to the reference direction of the present exemplary embodiment.

[0038] The dissimilar material joining apparatus 100 according to an exemplary embodiment has a structure in which the dissimilar materials of the composite material 1 and the metal material 3 can be joined to each other while minimizing adaptation of a facility and a manufacturing environment without using a separate medium such as a rivet or a bolt. To achieve this, the dissimilar material joining apparatus 100 according to the exemplary embodiment essentially includes a fixing bracket 10, a frame 20, a laser head 30, an upper tool 40, a lower tool 60, and an air intake member 80.

[0039] The mounting bracket 10 is attached to or detached from an arm 13 of a robot 11, and a tool changer (not shown) having a typical configuration is provided on the mounting bracket 10 so that it can be attached to and detached from a front end of the arm 13 of the robot 11. That is, in an exemplary embodiment of the present invention, the mounting bracket 10 can move in a multi-axis direction as a multi-axis movement of the arm 13 by teaching control of the robot 11.

[0040] However, the device 100 for joining different types of materials according to an exemplary embodiment is not necessarily limited to being attached to the arm 13 of the robot 11 by the attachment bracket 10, but can also be attached to a separate support frame. Various design elements, which will be described below, can be attached to the attachment bracket 10. The attachment bracket 10 is configured to support design elements and includes parts such as various blocks, plates, housings, covers, and bezels. However, since the parts are intended to represent the design elements of the attachment bracket 10, these parts are referred to as the attachment bracket 10 in an exemplary embodiment unless otherwise stated.

[0041] The frame 20 is provided on the mounting bracket 10. The frame 20 can be moved to various positions along the movement of the robot 11 while attached to the arm 13 of the robot 11 by the mounting bracket 10, and rotated by a predetermined angle by the arm 13 of the robot 11. The frame 20 is a C-shaped frame with a first free end 21 and a second free end 22 opposite each other, and is typically referred to as a "C-frame" or "C-type frame" in the art.

[0042] The laser head 30 is configured to irradiate a laser beam generated by a laser generator (not shown) to a joining point of the metal material 3. The laser head may be mounted on the mounting bracket 10 at a position near the first free end 21 of the frame 20, so that it corresponds to the upper tool 40 described below. That is, the laser head 30 irradiates the laser beam to the joining point of the metal material 3 to melt a portion corresponding to the joining hole 5 of the composite material 1.

[0043] Here, the laser head 30 does not completely melt the melting portion of the connection point of the metal material 3, but can emit a laser beam capable of melting the material down to its glass transition temperature, for example, in the case of steel, 600 to 650°C. The laser head 30 is a known melting laser head widely used in the art, so a more detailed description thereof is not provided in this specification.

[0044] The upper die 40 is configured to apply pressure to an upper surface of the metal material 30 overlapping with the composite material 1, and is provided at the first free end 21 of the frame 20 so as to correspond with the laser head 30 to move back and forth in the up-and-down direction. The upper die 40 has a hollow shape with upper and lower ends open, and a laser beam irradiation path 41 through which the laser beam passes, formed within the hollow portion. To achieve this, a through hole 43 through which the laser beam passes is formed at a lower end of the upper die 40.The through hole 43 has a diameter smaller than the upper opening of the upper tool 40, and the lower end of the upper tool 40 can be configured as a pressing end 45 that exerts pressure on the upper surface of the metal material 3. Furthermore, a first cooling water circulation path 47 for circulating cooling water supplied by a separate cooling water supply (not shown) is formed within the upper tool 40.

[0045] The upper tool 40 may be provided to move back and forth in the up-and-down direction by a working cylinder 50. The working cylinder 50 is provided to be attached to the mounting bracket 10 so as to correspond with the upper tool 40. The working cylinder 50 moves back and forth by air pressure or hydraulic pressure and includes a working rod 51 that moves the upper tool 40 in the up-and-down direction. The working rod 51 may be connected to the upper tool 40 by a connecting bracket 53.

[0046] The lower tool 60 is configured to support the connection point of the composite material 1 overlapping with the metal material 3 and may be attached to the second free end 22 of the frame 20 to correspond with the upper tool 40.

[0047] A groove 61, which is connected to the connection hole 5 of the composite material 1, is formed on the upper surface of the lower die 60, which supports the connection point of the composite material 1. The groove 61 may have a diameter larger than that of the connection hole 5 and be formed as a groove on an upper surface of the lower die 60. On the upper surface of the lower die 60, a support surface is formed at an edge of the groove 61, and the support surface may be formed as a support end 63, which supports the connection point of the composite material 1.

[0048] Further, an air discharge path 65 for discharging air between the groove 61 and the connecting hole 5 of the composite material 1 to the outside is formed inside the lower die 60. The air discharge path 65 is configured to pass through a center of a lower surface of the lower die 60 from a center of the lower surface of the groove 61. Further, a second cooling water circulation path 67 for circulating cooling water supplied by the separate cooling water supply (not shown) is formed inside the lower die 60.

[0049] Furthermore, a sealing member 71 as an air seal that blocks a gap between the composite material 1 and the support end 63 is formed on the support end 63 of the lower die 60. The sealing member 71 is configured to prevent the air between the groove 61 and the connecting hole 5 of the composite material 1 from escaping between the support end 63 of the composite material 1 and can be made of various materials, such as a metal material and a heat-resistant rubber.

[0050] An air suction element 80 is configured to suck the air between the groove 61 and the connecting hole 5 of the composite material 1 through the air discharge path 65 of the lower die 60, and includes a vacuum pump 81 connected to the air discharge path 65 of the lower die 60. The vacuum pump 81 is an air suction pump well known in the art, so a detailed description thereof is omitted in the present specification.

[0051] Hereinafter, an operation of the apparatus 100 for joining different kinds of materials according to an exemplary embodiment of the aforementioned configuration and a method for joining different kinds of materials using the joining apparatus 100 will be described in detail with reference to the above-described drawings and accompanying drawings.

[0052] Fig. 3A to 3F are diagrams for describing an operation of the apparatus 100 for bonding different types of materials according to an exemplary embodiment and a method for bonding the different types of materials. Referring to Fig. 3A, in an exemplary embodiment of the present invention, the metal material 3, such as a steel plate, a stainless steel plate, an aluminum material, or a non-ferrous alloy material, which can be used as a vehicle body panel, is prepared beforehand.

[0053] Further, in an exemplary embodiment of the present invention, a composite material 1 such as a carbon fiber reinforced plastic (CFRP) is prepared, and the connecting hole 5 is formed in the connecting point where the composite material and the metal material 3 are to be connected to each other.

[0054] Then, as in Fig. 3B, the composite material 1 and the metal material 3, which overlap with each other, are arranged at the support end 63 of the lower die 60. Accordingly, the lower die 60 can support the joining point of the composite material 1 through the support end 63. That is, the support end 63 of the lower die 60 can support the joining point of the composite material 1 through the sealing member 71. At this time, the upper die 40 has already been moved back by a retracting operation of the working rod 51 of the working cylinder 50, so that it is separated from the upper surface of the metal material 3 by a certain distance.

[0055] In such a state, in an exemplary embodiment of the present invention, the upper tool 40 is moved downward by a forward operation of the working rod 51 of the working cylinder 50, as shown in Fig. 3C. Accordingly, the upper tool 40 is lowered toward the joining point of the metal material 3 by the working cylinder 50 to apply a certain pressure to the joining point of the metal material 3 by the pressing end 45.

[0056] In this state, in an exemplary embodiment of the present invention, the laser beam 31 is irradiated to the joining point of the metal material 3 through the laser head 30. At this time, the laser beam 31 is irradiated to the joining point of the metal material 3 through the laser beam irradiation path 41 of the upper die 40, and can be irradiated to the joining point of the metal material 3 through the through-hole 43 along the laser beam irradiation path 41. Accordingly, a melting portion 91, which is melted by the laser beam 31, is formed at the joining point of the metal material 3. Here, the melting portion 91 is completely melted by the laser beam 31 so that it does not flow, and can be melted to a glass transition temperature (for example, 600 to 650°C in the case of steel).

[0057] In the aforementioned process, cooling water is circulated in the first cooling water circulation path 47 of the upper die 40 to cool an area around the molten portion 91 at the joining point of the metal material 3. This prevents heat of the molten portion 91 from being transferred to areas around the joining point.

[0058] Then, as in Fig. 3D, the air suction member 80 is operated, and the air between the groove 61 of the lower die 60 and the connecting hole 5 of the composite material 1 is sucked through the air discharge path 65 of the lower die 60. At this time, since the sealing member 71 is provided at the supporting end 63 of the lower die 60, the air between the groove 61 and the connecting hole 5 of the composite material 1 can be prevented from escaping between the supporting end 63 of the composite material 1. Thus, the molten portion 91 is introduced into the connecting hole 5 of the composite material 1 by air suction pressure through the air discharge path 65. At this time, the molten portion 91 can be introduced toward the groove 61 of the lower die 60 through the connecting hole 5.

[0059] In the above-mentioned process, in an exemplary embodiment of the present invention, a filler material 93 is filled into a base material loss portion (a hole of the fusion portion) of the connection point of the metal material 3, which is formed by inserting the fusion portion 91 into the connection hole 5 of the composite material 1, as shown in Fig. 3E. The filler metal 93 is melted by the laser beam 31 to fill the base material loss portion of the connection point of the metal material 3.

[0060] As described above, in an exemplary embodiment of the present invention, the emission of the laser beam 31 of the laser head 30 (see Fig. 3E), as in Fig.3F, the process is stopped while the filler metal 93 is filled into the base material loss portion of the connection point of the metal material 3. The cooling water is circulated in the second cooling water circulation path 67 of the lower die 60 to cool the molten portion 91 introduced into the connection hole 5 of the composite material 1. Accordingly, in an exemplary embodiment of the present invention, the molten portion 91 introduced into the connection hole 5 of the composite material 1 is cooled and contracted by the cooling water circulated in the second cooling water circulation path 67 of the lower die 60, so that the connection points of the composite material 1 and the metal material 3 can be integrally joined by strong joining forces through the molten portion 91.

[0061] When the upper tool 40 is moved upward by the retracting operation of the working cylinder 50, the process for joining different kinds of materials of the composite material 1 and the metal material 3 according to an exemplary embodiment of the present invention is completed.

[0062] As described above, with the method for joining different kinds of materials according to an exemplary embodiment of the present invention, it is possible to integrally join different kinds of materials of the composite material 1 and the metal material 3 by a contraction force generated when the molten portion 91 is cooled by forming the molten portion 91 at the joining point of the metal material 3 using a laser welding method and introducing the molten portion 91 into the joining hole 5 of the composite material 1 by the air suction pressure.

[0063] Accordingly, in the exemplary embodiment of the present invention, it is possible to join different types of materials of the composite material 1 and the metal material 3 by strong joining forces while minimizing a change in a joining facility and a manufacturing environment without using a separate medium such as a rivet or a bolt.

[0064] As a result, in the exemplary embodiment of the present invention, compared to a prior art rivet joining method, manufacturing costs are reduced and excellent appearance quality of a joined article is achieved. Furthermore, it is possible to reduce investment costs for the joining equipment and manufacturing environment caused by changes in joining materials, and to simplify the structure of the joining equipment.

[0065] While this invention has been described in connection with what are presently considered practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but on the contrary is intended to include various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

[1] A method for joining different types of materials of a metal material (3) and a composite material (1) having a connection hole (5) using a device (100) comprising: a frame (20) having a first free end (21) and a second free end (22) opposite each other; a laser head (30) provided at the first free end (21) of the frame (20) and emitting a laser beam (31) to a joining point of the metal material (3); an upper tool (40) which is intended to move back and forth on the first free end (21) of the frame (20) and to exert pressure on the metal material (3); a lower tool (60) which is intended to be attached to the second free end (22) of the frame (20) so that it corresponds to the upper tool (40) and supports a connection point of the composite material (1); and an air suction element (80) connected to the lower tool (60) for sucking air between the lower tool (60) and the connecting hole (5) of the composite material (1); and the method comprising the steps of: (a) providing the metal material (3) and the composite material (1) having the connection hole (5) formed at the connection point of the composite material (1); (b) arranging the composite material (1) and the metal material (3) overlapping each other on the lower tool (60) to support the connection point of the composite material (1) by the lower tool (60); (c) moving the upper tool (40) forward to apply pressure to the joining point of the metal material (3); (d) radiating the laser beam (31) through the laser head (30) to the joining point of the metal material (3) to form a fusion portion (91); (e) sucking air through the lower tool (60) to introduce the melting portion (91) into the connecting hole (5) of the composite material (1); and (f) cooling the melting section (91) by the lower tool (60) and bonding the composite material (1) and the metal material (3) together using the melting section (91). [2] A method according to claim 1, wherein in step (d) cooling water is circulated in the upper tool (40) to cool an area around the melting portion (91) at the joining point of the metal material (3). [3] A method according to claim 1 or 2, wherein in step (f) cooling water is circulated in the lower tool (60) to cool the melting section (91). [4] A method according to any one of the preceding claims, wherein in step (e) a filler metal (93) is filled into a base material loss portion of the connection point of the metal material (3). [5] A method according to any one of the preceding claims, wherein in step (f) the melting portion (91) is cooled and contracted to enable the composite material (1) and the metal material (3) to be combined. [6] Method according to one of the preceding claims, in which carbon fibre reinforced plastic (CFRP) is used as the composite material (1). [7] Method according to one of the preceding claims, wherein the frame (20) is attached to or detached from an arm (13) of a robot (11) by a mounting bracket (10). [8] The method according to claim 7, wherein the frame (20) is a C-type frame and is provided on the mounting bracket (10). [9] The method according to claim 7 or 8, wherein the laser head (30) is provided on the mounting bracket (10) to correspond to the upper tool (40). [10] Method according to one of claims 7 to 9, wherein at least one working cylinder (50) is provided for moving the upper tool (40) back and forth on the mounting bracket (10), and a working rod (51) of the at least one working cylinder (50) is connected to the upper tool (40). [11] A method according to any one of the preceding claims, wherein a laser beam irradiation path (41) through which the laser beam (31) passes is formed inside the upper tool (40), and a pressing end (45) for applying pressure to the joining point of the metal material (3) is formed on the upper tool (40). [12] A method according to any one of the preceding claims, wherein a first cooling water circulation path (47) circulating cooling water is formed on the upper tool (40). [13] A method according to any one of the preceding claims, wherein an air discharge path (65) which discharges air is formed within the lower tool (60) and a support end (63) for supporting the connection point of the composite material (1) on the lower tool (60). [14] A method according to any one of the preceding claims, wherein a second cooling water circulation path (67) circulating cooling water is formed on the lower tool (60). [15] The method according to any one of claims 13 or 14, wherein a sealing member (71) blocking a gap between the support end (63) and the composite material (1) is formed on the support end (63) of the lower tool (60). [16] Method according to one of claims 13 to 15, wherein the air intake element (80) comprises a vacuum pump (81) connected to the air discharge path (65).

Images