KR102661781B1 - Thermocompression jig device - Google Patents

Abstract

The jig device of the present invention may include an upper jig on which a heating plate whose temperature is raised for the thermal compression process is provided, and a lower jig on which the object to be thermally compressed is seated.
The heating plate of the present invention may include a first heating plate and a second heating plate facing different areas of the object to be thermocompressed.
When the upper jig of the present invention descends and pressurizes the object to be thermocompressed and the lower jig, the first heating plate and the second heating plate may be in close contact with the object to be thermocompressed.
Tilting or flatness between the first heating plate of the present invention and the object to be thermocompressed, and tilting or flatness between the second heating plate and the object to be thermocompressed, can be adjusted separately.

Description

Thermocompression jig device {Thermocompression jig device}

The present invention relates to a heat-compression jig device used to manufacture a rolling unit that supports a display panel using a heat-compression tape.

A sliding or rollable mobile device may include a rolling unit that supports the display panel to maintain tilting or flatness. The display panel can return to its original flat state even if the rolling unit repeats the rolling and unfolding operation to a predetermined radius of curvature.

The rolling unit needs to reinforce the rigidity at the back of the flexible display panel and also needs to be flexible enough to bend along with the display panel.

Since most rolling units have a plate-shaped structure with simple ductility, repeated sliding or rolling operations may cause wrinkles or separation from the display panel.

The rolling unit can be manufactured by thermocompression of the upper and lower jigs. Because the rolling unit supports the display panel, its nature may require precise tilting, flatness, or adhesion accuracy. If lifting or a gap occurs during thermal compression, the rolling unit may not smoothly transfer heat to the upper and lower surfaces of the rolling unit during thermal compression, which may deteriorate thermal compression performance.

In the thermal compression jig device of the present invention, the tilting, flatness, or joining precision of the rolling unit can be improved by the upper and lower elastic members and the two divided heating plates when thermally compressing the upper jig and the lower jig.

The jig device of the present invention may include an upper jig on which a heating plate whose temperature is raised for the thermal compression process is provided, and a lower jig on which the object to be thermally compressed is seated.

The heating plate of the present invention may include a first heating plate and a second heating plate facing different areas of the object to be thermocompressed.

When the upper jig of the present invention descends and pressurizes the object to be thermocompressed and the lower jig, the first heating plate and the second heating plate may be in close contact with the object to be thermocompressed.

Tilting or flatness between the first heating plate of the present invention and the object to be thermocompressed, and tilting or flatness between the second heating plate and the object to be thermocompressed, can be adjusted separately.

The thermal compression jig device of the present invention can manufacture a rolling unit supporting a display panel by thermal compression of the upper jig and lower jig.

The upper and lower jigs of the present invention may include an upper elastic member and a lower elastic member, respectively. When thermally compressing the upper jig and the lower jig, the tilting, flatness, or joining precision of the rolling unit can be improved by the upper and lower elastic members.

Additionally, the upper jig of the present invention may include a heating plate that is heated and faces the object to be thermocompressed. During thermal compression using the upper jig and lower jig, the heating plate may be divided into two first heating plates and two second heating plates to minimize heat loss due to lifting or gaps in the object to be thermally compressed.

Figure 1 is a perspective view of the thermocompression jig device of the present invention.
Figure 2 is a side view of the thermocompression jig device of the present invention.
Figure 3 is a plan view of the thermocompression jig device of the present invention.
Figure 4 is an explanatory diagram of a method of manufacturing a rolling unit using the thermocompression jig device of the present invention.
Figure 5 is an explanatory diagram of the first adhesion step of the method of manufacturing a rolling unit using the thermocompression jig device of the present invention.
Figure 6 is an explanatory diagram of the second adhesion step of the method of manufacturing the rolling unit using the thermocompression jig device of the present invention.
Figure 7 is a perspective view of a mobile device on which a rolling unit manufactured by the thermocompression jig device of the present invention is disposed.
Figure 8 is an explanatory diagram of the curved portion of the mobile device on which the rolling unit manufactured by the thermocompression jig device of the present invention is disposed.

Hereinafter, a rolling unit 100 that can be provided in a rollable or sliding type mobile device and can support the display panel 10 will be described as an example.

Since the rolling unit 100 manufactured by the thermocompression jig device of the present invention has a structure that supports flexible parts capable of repeated bending operations, it can be expanded and applied to sliding or rolling parts.

First, the thermal compression jig device of the present invention will be described, and then the rolling unit 100 manufactured by the thermal compression jig device of the present invention and the rolling unit manufacturing method will be described.

Hereinafter, with reference to FIGS. 1 to 3, the thermocompression jig device of the present invention will be described.

The first direction (x-axis direction) may be a direction in which the seating plate 930 operates. The first position P1 and the second position P2 may be switched along the first direction (x-axis direction). The second direction (y-axis direction) may be perpendicular to the first direction, and the first and second directions may be parallel to the horizontal direction. The third direction (z-axis direction) may be perpendicular to the first and second directions and parallel to the vertical direction.

The seating plate 930 moves along the forward and reverse directions of the first direction and can be switched between the first position (P1) and the second position (P2). The direction in which the upper jig 800 descends may be opposite to the third direction.

1 may be a state where the lower jig 900 is located at a first position (P1) where the first adhesion step (S100) and the second adhesion step (S200) are performed.

2 , like FIG. 1 , the lower jig 900 may be positioned at the first position (P1). 1 and 2 may be a state before the upper jig 800 comes into close contact with the lower jig 900 for thermal compression.

In this case, the heating plate 860 may be suspended from the upper support plate 830 by the upper elastic member 840 and the upper connection member 850 while being spaced apart from the upper support plate 830 by a predetermined distance d1. there is.

The upper elastic member 840 or the lower elastic member 940 may include a coil spring.

3 shows a first position (P1) and a second position (P2) of the present invention. The first position P1 may be a position where the lower jig 900 is heat-compressed together with the upper jig 800. At the second position P2, the remaining processes except the first adhesion step (S100) and the second adhesion step (S200) in the process for manufacturing the rolling unit 100 may be performed. At the second position P2, an alignment step (S50) or a separation step (S300) may be performed.

The thermocompression jig device may include an upper jig 800 and a lower jig 900.

In the first adhesion step (S100) and the second adhesion step (S200), the upper jig 800 is lowered while the lower jig 900 is fixed at the first position (P1), and the upper jig 800 and the lower jig The object between (900) can be heat-compressed.

The rolling unit 100 can be finally manufactured by going through the first adhesion step (S100) and the second adhesion step (S200). The rolling unit 100 may include a flexible metal plate 200 and a plurality of support bars 300 attached to the metal plate 200 to be spaced apart at predetermined intervals.

The upper jig 800 may include at least one of a heating plate 860, an upper support plate 830, and an upper frame 810.

The heating plate 860 may be lowered to a high temperature in the first adhesion step (S100) and the second adhesion step (S200) and may be in close contact with the lower jig 900.

The upper jig 800 can be lowered in an elevated temperature state to heat-compress the object to be heat-compressed and the lower jig 900, and the upper jig 800 may be primarily responsible for supplying heat energy required for the heat-compression process. .

The object to be thermocompressed may not be seated or attached to the upper jig 800, and the object to be thermocompressed may be seated only on the upper part of the lower jig 900.

The heating plate 860 may be divided into a plurality of pieces to prevent heat compression loss due to lifting or gaps. In one embodiment, the heating plate 860 may be divided into two: a first heating plate 861 and a second heating plate 862. During thermal compression, the first heating plate 861 and the second heating plate 862 may be tilted or adjusted for flatness separately.

A heating hole 864 in which a heater 870 for increasing temperature can be installed may be formed in the heating plate 860. To ensure that the thermal energy of the heater 870 is well transmitted to the heating plate 860, the heating plate 860 may be selected from a material that conducts heat well, such as brass. 1 and 2 illustrate a case where the heater 87 and the heating hole 864 have a cylindrical shape as an example.

A dividing boundary 863 may be formed between the divided heating plates 861 and 862. Since the divided heating plates are in a mutually divided state, the tilting or flatness of the divided heating plates can be adjusted when they are individually brought into close contact by the upper elastic member 840 provided on each individual heating plate.

The divided heating plates may be finely spaced apart. The fine separation distance between the divided heating plates may be for thermocompression tilting or to improve flatness. If the divided heating plates, whose tilting or flatness are individually adjusted, are tilted too much, adjacent heating plates may collide with each other to mutually limit shaking.

The first adhesion step (S100) may involve attaching the thermo-compression tape 500 to the metal plate 200 at predetermined intervals. The second adhesion step (S200) may involve attaching the support bar 300 to the metal plate 200 to which the thermocompression tape 500 is attached.

The object to be thermally compressed in the first adhesion step (S100) may be a thermally compressed tape 500 and a metal plate 200. Specifically, in the first adhesion step (S100), between the upper jig 800 and the lower jig 900, release paper 510, thermocompression tape 500, stopper 410, metal plate 200, and At least one of the protected areas 430 may be included.

In the second adhesion step (S200), at least one of the protective paper 430, the metal plate 200, and the support bar 300 may be included between the upper jig 800 and the lower jig 900.

The result of the first adhesion step (S100) may be a metal plate 200 to which the heat-compression tape 500 is attached so that it is spaced apart at a predetermined interval. The result of the second adhesion step (S200) may be a rolling unit 100 in which support bars 300 spaced apart at a predetermined interval are attached to a metal plate 200. The result of the second adhesion step (S200) may be the rolling unit 100.

In the first adhesion step (S100), the thermocompression tapes 500 spaced apart from each other at a predetermined interval may have a long extending shape. For example, the thermocompression tape 500 may extend parallel to the second direction (y-axis direction).

In the second adhesion step (S200), the support bars 300 spaced apart from each other at a predetermined interval may have a long extending shape. For example, the support bar 300 may extend parallel to the second direction (y-axis direction).

The boundary direction between the divided heating plates 861 and 862 may be determined depending on the object mounted on the lower jig 900.

The direction of the division boundary 863 of the divided heating plate 860 is the length extension direction of the heat compression tape 500 mounted on the lower jig 900, or the support bar mounted on the lower jig 900 for heat compression. The length of (300) may be perpendicular to the direction of extension. This may be to improve thermal compression tilting or flatness by ensuring that the entire thermocompression tape 500 or support bar 300 is in contact with each divided heating plate 860.

1 and 2, the direction of the dividing boundary 863 between the first heating plate 861 and the second heating plate 862 is the support bar 300 inserted into the attachment groove 932 of the lower jig 900. ) can be seen to be perpendicular to the longitudinal direction.

The upper support plate 830 can support the heating plate 860 while hanging in the air. The heating plate 860 may be supported by the upper support plate 830 by the upper elastic member 840 and the upper connection member 850 while being spaced apart at a predetermined distance d1.

The upper connection member 850 and the upper elastic member 840 may be separated from each other and connected to the upper support plate 830 and the heating plate 860. That is, the horizontal positions of the upper connection member 850 and the upper elastic member 840 may be different from each other.

This may be because the elastic force required for the upper elastic member 840 is high in order for the heating plate 860 to be suspended from the upper support plate 830, so that the radius of the upper elastic member 840 becomes wider or the thickness becomes thicker.

Before lowering the upper jig 800 for thermal compression, the heating plate 860 and the upper support plate 830 are spaced apart by a predetermined length d1, and when the upper jig 800 is lowered and thermally compressed, the heating plate 860 ) and the upper support plate 830 may be in close contact with each other.

If the upper elastic member 840 is inserted into the upper connection member 850 and disposed at the same horizontal position, the upper elastic member 840 may be located in the space between the heating plate 860 and the upper support plate 830. In this case, in order for the heating plate 860 and the upper support plate 830 to be in close contact with each other during thermal compression, the space occupied by the upper elastic member 840 and the space occupied by the upper connecting member 850 must be precisely adjusted.

Therefore, during the initial setting of the heating plate 860 and the upper support plate 830, the upper elastic member 840 and the upper connecting member 850 can be placed in separate horizontal positions to flexibly respond to the heat compression process conditions. there is.

If the heating plate 860, which is in direct contact with the object to be thermally compressed, is thermally compressed while its spatial position is fixed, installation and design, imbalance of force during pressing, or tilting or flatness of the object to be thermally compressed are Due to problems such as these, there is a possibility that lifting or gaps may occur during heat compression.

Therefore, since the upper elastic member 840 is connected to the heating plate 860 of the present invention, the present invention provides a gap between the upper jig 800 and the object to be thermally compressed during thermal compression, or an object to be thermally compressed and the lower jig ( 900) By reducing the gap between the heat compression tilting or flatness, it is possible to improve.

A through hole 832 into which the upper connection member 850 can be inserted may be formed in the upper support plate 830.

One end of the upper connection member 850 inserted into the through hole 832 may be fixed to the heating plate 860. The other end of the upper connection member 850 located on the upper support plate 830 is guided along the through hole 832 and can reciprocate up and down.

Accordingly, one end of the upper connection member 850 may be fixed relative to the heating plate 860, and the other end may be movable relative to the upper support plate 830.

One end of the upper elastic member 840 may be fixed to the heating plate 860, and the other end of the upper elastic member 840 may be fixed to the upper support plate 830.

A plurality of upper elastic members 840 may be provided. 1 and 2, an embodiment is shown in which a total of 8 plates are arranged, 4 each on the first heating plate 861 and the second heating plate 862.

In the state before the upper jig 800 is lowered and the heating plate 860 and the object to be thermocompressed come into contact, the heating plate 860 is held in the air on the upper support plate 830 by the contraction elastic force of the upper elastic member 840. You can hang on.

A locking protrusion 834 may be formed in the through hole 832. The range of motion of the other end of the upper elastic member 840 may be regulated by the locking protrusion 834. The radius of the through hole 832 may vary based on the stopping protrusion 834. The radius of the through hole 832 in the vertical direction of the locking protrusion 834 may be larger than that of the through hole 832 in the lower part.

The predetermined gap d1 by the upper elastic member 840 may be determined by the upper elastic member 840 and the upper connection member 850. Before lowering the upper jig 800 by thermocompression, the distance d1 between the heating plate 860 and the upper support plate 830 may vary depending on the position of the stopping protrusion 834.

Before the thermocompression lowering of the upper jig 800, a gap d1 is formed between the heating plate 860 and the upper support plate 830 by the upper elastic member 840, and the other end of the upper connecting member 850 is caught. The heating plate 860 may not be extended any further because it is caught by the jaw 834.

When the upper jig 800 is lowered and heat-compressed with the lower jig 900, the upper elastic member 840 is compressed and the heating plate 860 may be in close contact with the upper support plate 830. The other end of the upper connection member 850 located on the upper support plate 830 may be spaced apart from the stopping protrusion 834. In this case, the upper connection member 850 may be guided by the through hole 832.

Compared to the standby state before thermal compression, when the heating plate 860 is in close contact with the upper support plate 830, the relative position of the upper connection member 850 with the upper support plate 830 may increase.

The upper support plate 830 is connected to the upper frame 810, so that the relative positions of the upper frame 810 and the upper support plate 830 can be fixed to each other during the heat compression process.

A pressing unit 710 that applies an external force to the upper frame 810 may be provided. The pressurizing unit 710 may be of a pneumatic or other type. When the pressing unit 710 located at the top of the upper frame 810 applies pressure to the upper frame 810 in the vertical downward direction, the upper frame 810, the upper support plate 830, and the heating plate 860 are lowered as one body. can do.

The lower jig 900 may include at least one of a seating plate 930, a lower support plate 960, and a lower frame 910.

An object to be thermally compressed may be seated on the seating plate 930.

An attachment groove 932 into which the support bar 300 can be inserted may be formed in the seating plate 930 in the second adhesion step (S200). The formation of the attachment groove 932 may include not only the case where the attachment groove 932 is formed on the seating plate 930 itself, but also the case where the flat plate on which the attachment groove 932 is formed is fitted into the seating plate 930. When the attachment groove 932 is formed on the seating plate 930 itself, when the first attachment step (S100) is performed, the attachment groove 932 may be brought to another plate. When the flat plate on which the attachment groove 932 is formed is inserted into the seating plate 930, the flat plate on which the attachment groove 932 is formed is not used in the first bonding step (S100) but can be used only in the second bonding step (S200). .

The seating plate 930 may include a fixing pin 934 that can fix the object to be thermocompressed in place. During heat compression, a fixing hole 604 into which a fixing pin 934 can be inserted may be formed in the member mounted on the lower jig 900.

The member seated on the lower jig 900 during heat compression may include at least one of the release paper 510, the stopper 410, the metal plate 200, and the protective paper 430 in the first adhesion step (S100). there is.

The member seated on the lower jig 900 during heat compression is at least one of the protective paper 430, the metal plate 200, the adhesive paper 520, and the plate on which the attachment groove 932 is formed in the second bonding step (S100). It can contain one.

The seating plate 930 may be supported on the lower support plate 960. The seating plate 930 may be connected to the lower support plate 960 by a lower elastic member 940 and a lower connecting member 950.

One end of the lower connecting member 950 may be connected to and fixed to the seating plate 930, and the other end of the lower connecting member 950 may be connected to and fixed to the lower support plate 960.

The seating plate 930 may be spaced apart from the lower support plate 960 by a predetermined length d2 by the lower elastic member 940.

The lower elastic member 940 may be inserted into the lower connection member 950 and inserted between the seating plate 930 and the lower support plate 960. That is, the horizontal positions of the lower elastic member 940 and the lower connecting member 950 may be the same. This may be because, while the heating plate 860 and the upper support plate 830 are in close contact during heat compression, the seating plate 930 and the lower support plate 960 do not need to be in close contact during heat compression.

The lower elastic member 940, like the upper elastic member 840, is used to improve tilting or flatness during heat compression. In this case, the heating plate 860 may be divided into multiple pieces, but the seating plate 930 may not be divided.

During heat compression, the seating plate 930 may experience shaking such as vibration, but the lower support plate 960 and the seating plate 930 are connected by the lower elastic member 840, so the lower support plate 960 is not affected by shaking. You can.

In addition, compared to the heating plate 860 being suspended from the upper support plate 830 by the upper elastic member 840, the lower elastic member 940 may be sufficient to simply support the self-weight of the seating plate 930. . Accordingly, the lower elastic member 940 has a lower elastic force required than the upper elastic member 840, and thus the radius or thickness may be reduced compared to the upper elastic member 840.

A lower support plate 960 may be connected to and supported on the lower frame 910. The lower frame 910 may include a rail unit 964 for integrally moving the lower support plate 960 and the seating plate 930 in the horizontal direction.

A handle 962 may be provided on the lower support plate 960, and a rail unit 964 may be provided on the lower frame 910. The user can switch the lower support plate 960 to the first position (P1) and the second position (P2) using the handle 962.

The first position (P1) is where the object to be thermally compressed is thermally compressed (S130, S230) by the upper jig 800 and the lower jig 900 in the first adhesion step (S100) and the second adhesion step (S200). It could be location.

The second location (P2) may be a location where the remaining steps except thermal compression are performed.

Before the thermocompression tape 500 of the first adhesion step (S100) is seated on the lower jig 900, at least one of the stopper 410, the metal plate 200, and the protective paper 430 is attached to the lower jig 900. ) may be performed at the second position (P2) (S110). After the thermal compression (S130) of the first adhesion step (S100), the step (S150) of separating the metal plate 200 to which the thermal compression tape 500 is attached from the lower jig 900 is performed at the second position (P2). It can be.

Before the thermal compression (S230) of the second adhesion step (S200), the support bar 300 spaced apart from the adhesive paper 520 at a predetermined interval is seated on the lower jig 900 (S210) at the second position (P2). ) can be performed. After the heat compression (S230) of the second adhesion step (S200), the step (S250) of separating the metal plate 200 to which the support bar 300 is attached by the heat compression tape 500 from the lower jig 900 is performed. It can be performed in position 2 (P2).

In order to improve thermocompression tilting or flatness, the upper frame 810 and the lower frame 910 may be connected and fixed to each other by the side frame 730.

A side elastic member 732 may be provided along the outer peripheral surface of the side frame 730. When the upper jig 800 is pressed by the pressing unit 710, the upper frame 810, the upper support plate 830, and the heating plate 860 can be lowered as one body, and are lowered by the side elastic member 732. The lowering speed of the upper jig 800 can be adjusted to prevent the upper jig 800 and lower jig 900 from colliding suddenly.

With reference to FIGS. 4 to 6, a method for manufacturing a rolling unit manufactured by the thermocompression jig device of the present invention will be described.

The rolling unit 100 may include a metal plate 200 and a support bar 300. A plurality of support bars 300 may be attached to one surface of the rolling unit 100 at predetermined intervals.

The support bar 300 of the present invention can be attached to the metal plate 200 by a thermocompression process using a thermocompression tape 500.

When the support bar 300 is attached by thermocompression, after processing the thermocompression tape 500 between the support bar 300 and the metal plate 200, the upper jig 800 and the lower jig 900 are attached. Through heat treatment, the support bar 300 can be bonded to the metal plate 200.

The metal plate 200 or the support bar 300 may include a metal material including stainless steel, such as SUS301 or SUS304.

The adhesive portion may be located between the metal plate 200 and the support bar 300. The adhesive portion may include a thermo-compression tape 500. When attaching the metal plate 200 to the support bar 300, a thermocompression tape 500 may be used. The drawing of the present invention may illustrate a thermocompression tape 500 as an example of an adhesive part.

The adhesive portion may be disposed between the metal plate 200 and the support bar 300. The support bar 300 may be fixed to the metal plate 200 by an adhesive part.

The metal plate 200 may include a plate portion 240 that supports the support bar 300 and a pattern portion 220 that is softer than the plate portion 240 so that the rolling unit 100 can be bent.

The adhesive portion and support bar 300 may be laminated only on the plate portion 240.

Referring to FIG. 4, the rolling unit manufacturing method includes a first adhesion step (S100) and a second adhesion step (S200) using thermal compression of the upper jig 800 and the lower jig 900, and a plurality of support bars 300. It may include at least one of an alignment step (S50) of arranging the units to be spaced apart at predetermined intervals, and a separation step (S300) of separating the rolling unit 100 from the fixing plate 600.

It can be said to be a heat compression process including the first adhesion step (S100) and the second adhesion step (S200). The first adhesion step (S100) may be a step of attaching the thermo-compression tape 500 to the metal plate 200. The second adhesion step (S200) may be a step of attaching the metal plate 200 and the support bar 300.

The result of the first adhesion step (S100) may be that the thermo-compression tape 500 is attached to one surface of the metal plate 200 at a predetermined interval. In this case, the protective paper 430 may be attached to the other surface of the metal plate 200.

The result of the second adhesion step (S200) may be that the support bars 300 are attached to one surface of the metal plate 200, spaced apart by heat-compression tapes 500 at predetermined intervals. In this case, the protective paper 430 may be attached to the other surface of the metal plate 200.

The protective paper 430 may include a polyimide (PI, polyimide) film. PI film has high heat and chemical resistance, so it can be used in high-temperature process environments. The PI film is light and flexible and may be suitable for attachment to the metal plate 200 during the heat compression process (S100, S200).

In the second adhesion step (S200), the support bar 300 may be inserted into and fixed to the attachment groove 932 of the lower jig 900 (S210).

In the alignment step (S50), the plurality of support bars 300 may be attached to the adhesive paper 520 to be spaced apart at a predetermined interval before being inserted into the attachment groove 932.

By the alignment step (S50), the plurality of support bars 300 can be quickly and accurately inserted into the attachment groove 932 of the lower jig 900 in the second adhesion step (S200).

The rolling unit manufacturing method of the present invention may be performed in the order of the first adhesion step (S100), the second adhesion step (S200), and the separation step (S300). The alignment step (S50) may be performed before the second adhesion step (S200).

Referring to FIG. 5 , the first adhesion step (S100) may be a step of attaching the thermo-compression tape 500 to one surface of the metal plate 200. The thermocompression tape 500 may extend in the longitudinal direction, and each thermocompression tape 500 may be spaced apart at a predetermined interval.

After the first adhesion step (S100), the thermocompression tape 500 may be attached to the plate portion 240 of the metal flat plate 200. This may be because the thermocompression tape 500 is located between the plate portion 240 and the support bar 300 of the metal plate 200.

In the first adhesion step (S100), the metal plate 200 is seated on the lower jig 900 (S110), and then the heat-compression tape 500 is placed on the upper jig 800 to attach the metal plate 200 to the upper jig 800. After thermocompression (S130), the metal plate 200 to which the thermocompression tape 500 is attached can be separated from the lower jig 900 (S150).

When the metal flat plate 200 is placed on the lower jig 900 (S110), a protective paper 430 may be attached to one side of the metal flat plate 200.

When the metal plate 200 is placed on the lower jig 900 (S110), the other surface of the metal plate 200 may face the stopper 410.

When the metal plate 200 is placed on the lower jig 900 (S110), the stopper 410, the metal plate 200, the protective paper 430, and the lower jig 900 may be arranged in this order from the top.

During the first adhesion step (S100), the protective paper 430 may remain attached to one surface of the metal plate 200.

During the rolling unit manufacturing process, a protective paper 430 may be attached to one side of the metal plate 200. That is, the protective paper 430 may be located on the opposite side of the support bar 300 attached to the metal plate 200.

The protective paper 430 can alleviate pattern distortion caused by the high temperature of the metal plate 200 during the thermal compression process including the first adhesion step (S100) and the second adhesion step (S200).

During the thermal compression process including the first adhesion step (S100) and the second adhesion step (S200), a portion of the thermal compression tape 500 located on the plate portion 240 may overflow and pass through the pattern portion 220. there is. This overflowing heat-compression tape 500 may be pressed to the upper jig 800 or lower jig 900. In this case, when the metal flat plate 200 is separated from the upper jig 800 or the lower jig 900 after the thermal compression process, the metal flat plate 200 may be distorted. The distortion of the metal plate 200 may distort the repeating pattern of the support bar 300 and the pattern portion 220, and the tilting or flatness of the metal plate 200 may vary.

Therefore, the protective paper 430 of the present invention prevents the overflowing heat-compression tape 500 from sticking to the jigs 400 and 600 during the heat-compression process including the first adhesion step (S100) and the second adhesion step (S200). can do.

The protective paper 430 can alleviate shrinkage of the metal plate 200 in a high temperature environment during the thermocompression process.

The protective paper 430 may have high heat resistance to maintain its shape even at high temperatures to prevent the metal plate 200 from being misaligned during the high-temperature thermocompression process.

The protective paper 430 may be attached to the metal flat plate 200 before the first adhesion step (S100), and the protective paper 430 may be separated from the metal flat plate 200 after the second adhesion step (S200).

The stopper 410 can prevent a large amount of the thermo-compression tape 500 from melting at high temperature and overflowing into the pattern portion.

A stopper 410 may be provided to regulate the width and thickness of the thermocompression tape 500 compressed in the thermocompression process.

After seating the metal flat plate 200 on the lower jig 900 (S110), place the thermocompression tape 500 on the upper part of the plate portion 240 of the metal flat plate 200 and then heat it using the upper jig 800. Can be compressed (S130).

The temperature and heat compression time of the upper jig 800 and the lower jig 900 for heat compression (S130) in the first bonding step (S100) are determined by the upper jig for heat compression (S130) in the second bonding step (S200) ( The temperature and heat compression time of 800) and the lower jig 900 may be set shorter.

For example, the temperature of the thermal compression (S130) in the first adhesion step (S100) may be set to 130°C for the upper jig (800), 50°C for the lower jig (900), and The time can be set to 7 seconds. The temperature of the thermal compression (S230) in the second adhesion step (S200) may be set to 230°C for the upper jig (800) and 80°C for the lower jig (900), and the pressing time is 30 seconds. can be set.

During thermal compression in the first adhesion step (S130), the upper jig 800, the thermal compression tape 500, the metal plate 200, and the lower jig 900 may be arranged in this order from above. Specifically, during heat compression in the first adhesion step (S130), the upper jig 800, release paper 510, heat compression tape 500, stopper 410, metal plate 200, and protective paper 430 are attached from above. Can be placed in order.

After the thermal compression of the first adhesion step (S130), the metal plate 200 may be separated from the lower jig 900 (S150). A thermocompression tape 500 may be attached to one side of the metal plate 200, and a protective paper 430 may be attached to the other side of the metal plate 200.

The thermocompression tape 500 may be attached to the plate portion 240 of the metal flat plate 200.

The metal plate 200 to which the thermocompression tape 500 is attached may be used in the second adhesion step (S200).

During the thermal compression in the first adhesion step (S130), in order to accurately position the thermal compression tape 500 on the plate portion 240 of the metal plate 200, the thermal compression tape 500 is attached to the release paper 510 in a predetermined manner. It can be seated on the upper part of the metal plate 200 while being attached and spaced apart at intervals.

When the number of support bars 300 attached to the metal plate 200 is N (where N is an integer of 2 or more), the method of manufacturing the rolling unit of the present invention includes the release paper 510 and the release paper 510. Preparing a tape structure 501 including N heat-compressed tapes 500 attached at intervals; And a first adhesion step (S100) of aligning the heat-compressed tape portion of the tape structure 501 to the plate portion 240 of the metal plate 200 and then adhering the tape structure 501 to the metal plate 200. can do.

The thermocompression tape 500 may be attached to the release paper 510 at a distance from each other before being placed on the metal plate 200 in the first adhesion step (S100).

After the heat-compression tape 500 is attached to the release paper 510 with the width of the metal plate 200, a portion of the heat-compression tape 500 corresponding to the pattern portion 220 of the metal plate 200 is removed. You can. At this time, it is preferable to use a semi-cutting process to prevent the release paper 510 from being cut.

The thermocompression tape 500 from which the portion corresponding to the pattern portion 220 has been removed may extend in the longitudinal direction of the metal plate 200 so that it can be attached to the support bar 300 or the plate portion 240.

The plurality of thermocompression tapes 500 from which the portion corresponding to the pattern portion 220 has been removed may be spaced apart at a predetermined interval.

During the thermal compression (S130) of the first adhesion step (S100), the portion corresponding to the pattern portion 220 of the thermal compression tape 500 disposed on the metal plate 200 or the stopper 410 is removed and the release paper ( 510) may be attached.

The fixing hole 604 may be provided on the lower jig 900 or a member mounted on the alignment unit. The lower jig 900 or the alignment part may be provided with a fixing pin 610 inserted through the fixing hole 604. The fixing hole 604 can guide the members mounted on the lower jig 900 or the alignment unit to be seated in accurate positions.

The fixing hole 604 may be included in at least one of the stopper 410, the fixing plate 600, the release paper 510, and the adhesive paper 520. The metal plate 200 may be included in the fixing plate 600 during the thermal compression process (S100, S200). Specifically, the fixing hole 604 may be formed on the edge 602 of the fixing plate 600.

In the first adhesion step (S100) and the second adhesion step (S200), the member mounted on the lower jig 900 may be guided to the correct position by the fixing part.

The fixing part may include a fixing hole 604 and a fixing pin 610. The fixing hole 604 may be formed in a member mounted on the lower jig 900, and the fixing pin 610 may be formed in the lower jig 900. The fixing hole 604 may be inserted through the fixing pin 610. In the first adhesion step (S100) and the second adhesion step (S200), the member mounted on the lower jig may be guided to the correct position by the fixing part.

The fixing hole 604 may be formed in a member mounted on the lower jig 900, and the fixing pin 934 may be formed in the lower jig 900. A fixing pin 934 may be inserted through the fixing hole 604.

The member mounted on the lower jig 900 in the first adhesion step (S100) includes the release paper 510 to which the heat-compression tape 500 is attached, the width of the heat-compression tape 500 attached to the metal plate 200, and It may include at least one of a stopper 410 that regulates the thickness, a metal plate 200, and a protective paper 430 attached to the opposite side of the metal plate 200 to which the heat-compression tape 500 is adhered.

The member mounted on the lower jig 900 in the second adhesion step (S200) is an adhesive paper 520 to which support bars 300 spaced at a predetermined interval are attached, and a metal plate to which the thermocompression tape 500 is attached. It may include at least one of a protective paper 430 attached to the opposite side of 200 and a metal plate 200.

The stopper 410 may include an opening 412 penetrating upward and downward. The opening 412 may face the plate portion 240 of the metal flat plate 200 and may extend long to correspond to the plate portion 240.

During the heat compression (S130) of the first adhesion step (S100), the heat compression tape 500 attached to the release paper 510 passes through the opening 412 and faces the plate portion 240 of the metal flat plate 200. You can.

The width of the opening 412 of the stopper 410 may correspond to the width of the plate portion 240 of the metal plate 200.

When the heat-compression tape 500 is heat-compressed on the metal plate 200 without the stopper 410 using the upper jig 800, the heat-compression tape 500 melts more than expected and is attached to the plate portion 240. A problem may occur where the thickness of the thermocompression tape 500 becomes too thin.

Accordingly, the stopper 410 may serve to maintain the thickness of the heat-compression tape 500 adhered to the plate portion 240 during heat-compression (S130) in the first adhesion step (S100).

The thickness (d3') of the thermocompression tape 500 attached to the metal plate 200 may be adjusted according to the thickness (d3) of the stopper 410.

After the thermocompression process of the first adhesion step (S130), the attached metal plate 200 of the thermocompression tape 500 may be separated from the lower jig 900, and the release paper 510 may be separated from the thermocompression tape 500. It can be separated from (S150). In this case, the heat-compression tape 500 spaced apart at a predetermined interval may be attached to one side of the metal plate 200, and the protective paper 430 may be attached to the other side of the metal plate 200. .

The alignment step (S50) may be performed to provide the support bars 300 spaced apart at a predetermined interval in the second adhesion step (S200).

The separation distance between the support bars 300 attached to the adhesive paper 520 in the alignment step (S50) may correspond to the separation distance between the attachment grooves 932 of the lower jig 900 into which the support bars 300 are inserted.

The separation distance between the support bars 300 attached to the adhesive paper 520 in the alignment step (S50) may correspond to the separation distance between the heat-compression tapes 500 attached to the metal plate 200.

The alignment step (S50) includes inserting a plurality of support bars 300 into a plurality of alignment grooves of the alignment section, attaching the support bars 300 inserted into the alignment grooves of the alignment section to the adhesive paper 520, and adhering. It may include at least one step of separating the plurality of support bars 300 attached to the support 520 from the alignment part.

As a result of the alignment step (S50), the plurality of support bars 300 may be spaced apart at a predetermined interval and provided in a state attached to the adhesive paper 520 in the second adhesion step (S200).

Referring to FIG. 6, in the second adhesion step (S200), a plurality of support bars 300 attached to the adhesive paper 520 are spaced at a predetermined interval in the alignment step (S50) and are attached to the attachment groove of the lower jig 900. It may include a step (S210) inserted into (932).

When the rolling unit manufacturing method is performed with both a pair of upper jig 800 and lower jig 900, the alignment portion may be the same as that of the lower jig 900. In this case, the alignment step (S50) may be omitted and the second adhesion step (S200) may be performed after the first adhesion step (S100). Additionally, the step of attaching the support bar 300 to the adhesive paper 520 may be omitted.

However, when manufacturing the rolling unit 100 in large quantities, if the alignment part is the same as the lower jig 900, when each support bar 300 is inserted into the attachment groove 932 of the lower jig 900, the lower jig ( It may be heated to a significant temperature of 900). Accordingly, the risk of a worker receiving a burn or the like while inserting the support bar 300 into the attachment groove 932 may increase. Since more than 20 support bars 300 can be attached to the metal plate 200, it may be dangerous to manually insert the support bars 300 one by one into the high temperature lower jig 900.

If the support bars 300 spaced apart at predetermined intervals are prepared separately from the lower jig 900 in the alignment step (S50), problems such as burns can be avoided.

The upper jig and lower jig of the first adhesion step (S100) may be provided separately from the upper jig of the second adhesion step (S200). In this case, the attachment groove 932 may not be formed in the lower jig of the first adhesion step (S100), but may be formed in the lower jig of the second adhesion step (S200).

The upper jig and lower jig of the first adhesion step (S100) may be the same as the upper jig of the second adhesion step (S200). In this case, the member including the attachment groove 932 may be attached to the lower jig in the first adhesion step (S100) and the attachment groove 932 may be formed on the upper surface of the lower jig in the second adhesion step (S200).

After inserting the attachment groove 932 of the support bar 300 (S210), the adhesive paper 520 can be removed from the support bar 300.

The second adhesion step (S200) is a step of thermo-compressing the metal plate 200 to which the thermo-compression tape 500 is attached to the support bar 300 mounted on the lower jig 900 using the upper jig 800 (S230). ) may include.

The rolling unit 100 of the present invention can be completed through the thermal compression (S230) of the second adhesion step (S200). By the heat compression (S230) of the second adhesion step (S200), the support bar 300 may be attached to the metal plate 200 using a heat compression tape 500.

After the second adhesion step (S200), the protective paper 430 may be removed from the metal plate 200.

Removal of the protective paper 430 may be performed before the separation step (S300) or may be performed after the metal plate 200 is separated in the separation step (S300).

Referring to FIG. 10, a fixing plate for fixing the position of the metal plate 200 with respect to the upper jig 800 or the lower jig 900 during the first adhesion step (S100) and the second adhesion step (S200) of the present invention. (600) may be used.

The fixing plate 600 may include at least one of a metal plate 200, an edge 602, and a bridge.

The border 602 and the bridge attach the metal plate 200 to the lower jig 900 or the alignment unit during at least one of the first adhesion step (S100), the second adhesion step (S200), and the alignment step (S50). It can be fixed. The bridge may be located between the edge 602 and the metal plate 200 to connect the edge 602 and the metal plate 200.

The metal plate 200 may be separated from the fixing plate 600 in the separation step (S300).

A separation portion may be provided at an end of the bridge connected to the metal plate 200.

The metal plate may be separated from the separator in the separation step (S300) after the first adhesion step (S100) and the second adhesion step (S200).

The metal plate 200 provided on the fixing plate 600 may be connected to the border 602 surrounding the metal plate 200 by a bridge.

The metal plate 200 and the bridge may be connected by a separator. The separation portion may be an end of a bridge connected to the metal plate 200. The separation portion can be formed thinly using a half etching method that chemically melts it to facilitate separation. The separation portion may become thinner as it moves from the edge 602 to the metal plate 200.

The fixing plate 600 may undergo a heat compression process including a first adhesion step (S100) and a second adhesion step (S200). During a high-temperature thermocompression process, the metal plate 200 and edge 602 of the fixing plate 600 may be misaligned due to shrinkage or other reasons.

The bridge connecting the metal plate 200 and the edge 602 may be structured to absorb shrinkage of the fixing plate 600 due to high-temperature thermal compression.

The bridge of the present invention can be connected to the metal plate 200 with an appropriate width to absorb the shrinkage of the fixing plate 600.

If the bridge is too thick, it may shrink, as can the rim 602 and the metal plate 200. If the bridge is too thin, the shrinkage of the fixing plate 600 may be concentrated on the bridge, causing the positions of the edge 602 and the metal plate 200 to shrink more severely.

The metal plate 200 may include a flexible pattern portion 220 and a plate portion 240 on which the support bar 300 is disposed, and the pattern portion 220 may be alternately disposed with the plate portion 240. You can.

The separation portion of the bridge may be connected to the pattern portion 220 of the metal plate 200.

If the bridge does not sufficiently absorb the contraction of the fixing plate 600, the position of the fixing hole 604 inserted into the fixing pin 610 of the lower jig 900 is misaligned, so that the fixing plate 600 is connected to the lower jig 900. Problems may arise that make insertion difficult.

In addition, if the bridge does not sufficiently absorb the contraction of the fixing plate 600, the position of the metal plate 200 to which the support bar 300 is attached is distorted, and when the metal plate 200 is attached to the support bar 300, A malposition problem may occur in which the support bar 300 is not aligned in the correct position of the plate portion 240 of the metal plate 200.

The bridge may have a structure in which holes are drilled in a plate member, and the spokes and holes may be alternately and repeatedly arranged. The bridge having the above structure can be elastic to external forces similar to an elastic member and can function to absorb the contraction of the fixing plate 600.

Accordingly, the bridge can absorb shrinkage and prevent misalignment even during the high-temperature thermocompression process due to the separating portion formed at the end thin by half-etching and the elastic structure.

With reference to FIGS. 7 and 8, the combination of the rolling unit 100 of the present invention and the mobile device will be described.

The rolling unit 100 may include a support bar 300 and a flexible metal plate 200 to which the support bar 300 is attached.

The metal plate 200 may include a plate portion 240 to which the support bar 300 can be attached, and a pattern portion 220 that allows the rolling unit 100 to roll.

A plurality of support bars 300 may be arranged on the plate portion 240 of the metal plate 200 to be spaced apart at regular intervals.

The support bar 300 may be guided in a rolling motion along the guide portion 23 inside the mobile device. The support bar 300 may include a guide protrusion 340. The guide protrusion 340 may be connected to the guide portion 23 that can guide the rolling or sliding operation of the rolling unit 100.

An adhesive portion may be formed to attach the support bar 300 to the metal plate 200. When the support bar 300 is attached using a thermo-compression method, the adhesive portion may include a thermo-compression tape. When the support bar 300 is attached by soldering, the adhesive portion may include solder cream.

The support bar 300 may include a protrusion adhesive portion 320 to which the guide protrusion 340 is joined. The guide protrusion 340 may be connected to the guide portion 23 by a slider.

The rolling or sliding motion path of the rolling unit 100 may be regulated by the guide protrusion 340 and the guide portion 23.

The rolling unit 100 equipped with the support bar 300 of the present invention may be structured to support the rolling or sliding operation of the display panel 10.

One surface of the rolling unit 100 may be smooth and may face the display panel 10. The other surface of the rolling unit 100 may protrude from the support bar 300 so that the guide protrusion 340 can be fastened to the guide portion 23 of the main body 20 of the mobile device.

The support bar 300 may have a guide protrusion 340 attached to a flat stick-shaped stick portion. The guide protrusion 340 needs to be small in size and have a complex shape for fastening to the guide portion 23, and for this purpose, the rolling unit 100 may have a double joint structure. Specifically, the rolling unit 100 may have a double bonded structure including bonding of the support bar 300 and the metal plate 200, and bonding of the stick portion and the guide protrusion 340.

The mobile device may be provided with a guide unit 23. The rolling unit 100 may be coupled to the guide portion 23 to enable rolling and sliding. The rolling unit 100 can support the flexible display panel 10 in a rolling manner.

One smooth surface of the metal plate 200 may face the display panel 10, and a support bar 300 connected to the main body 20 of the mobile device may be attached to the other side of the metal plate 200.

The support bar 300 may have a shape extending along the longitudinal direction. A plurality of support bars 300 may be attached to the other surface of the metal plate 200 at predetermined intervals.

An adhesive portion may be formed between the surface of the support bar 300 and the other surface of the metal plate 200. The position of the support bar 300 may be fixed to the metal plate 200 by the adhesive portion. The adhesive portion may include a thermo-compression tape 500.

Referring to FIG. 7 , a sliding or rollable mobile device may include at least one of a flexible display panel 10, a main body 20, and a moving unit 30.

The main body 20 may include a case in which most components, including the main board and battery, of the mobile device are installed and form an external appearance. The rolling unit 100 of the present invention is connected to the main body 20 and can serve as a guide when rolling or sliding the display panel 10.

Referring to FIG. 8, the front and back sides of the main body 20 of the mobile device, which are parallel to each other, may face the planar moving portion of the metal plate 200, and the curved portion 32 of the main body 20 may be made of metal. It may face the curved moving portion of the flat plate 200.

Specifically, the main body portion 20 of the mobile device may include a front portion, a rear portion, and a curved portion 32.

The front portion and the rear portion may be parallel to each other. The curved portion 32 may be located between the front portion and the rear portion. One end of the front part may be connected to one end of the curved part 32, and the other end of the curved part 32 may be connected to one end of the rear part.

During the rolling operation of the rolling unit 100, the planar moving portion may face the front or rear portion of the main body portion 20, and the curved moving portion of the panel support unit 100 may face the curved portion 32. there is. Between the front part and the curved part 32 and between the rear part and the curved part 32, the planar moving part and the curved moving part of the rolling unit 100 can be switched between each other.

The rolling unit 100 of the present invention is in an open state in which the flexible display panel 10 is unfolded from the main body 20 to implement a large screen, or a part of the flexible display panel 10 is stored inside the main body 20. You can take a closed state where the total screen size exposed to the outside is minimized.

The main body edge 22 may function as a side cover of the main body 20. That is, the edge 22 of the main body covers the internal structure of the curved portion 32 where the display panel 10 is bent to prevent the inflow of foreign substances, and blocks access to the inside of the main body 20 from the outside to prevent water or contamination. It can function.

The flexible display panel 10 can be easily bent, so a means to support it in a flat state may be needed to form a screen. The moving unit 30 may support at least a portion of the display panel 10. Meanwhile, in order to implement an edge screen, the end of the moving unit 30 may be curved.

The moving unit 30 may partially support the display panel 10 in a curved shape, as in the example of the edge portion, or may support a large area of the display panel 10 in a flat state. The moving unit 30 may serve to support the display panel 10 so that it does not bend due to external force.

10... display panel 20... main body
22... Edge of main body 23... Guide part
30... moving part 32... curved part
100... rolling unit 200... metal plate
220... pattern part 240... plate part
260... Connection 300... Support bar
340... Guide projection 342... End guide projection
344... Central guide protrusion
410... stopper 412... opening
430... protective paper 500... thermo-compression tape
501... tape structure 510... release paper
520... Adhesive paper 521... Support bar structure
600... fixing plate 602... border
604... fixing hole 710... pressurized part
730... side frame 732... side elastic member
800... upper jig 810... upper frame
830... upper support plate 832... through hole
834... Locking jaw 840... Upper elastic member
850... upper connection member 860... heating plate
861... first heating plate 862... second heating plate
863... Split boundary 864... Heating hole
870... heater 900... lower jig
910... Lower frame 930... Seating plate
932... Attachment groove 934... Fixing pin
940... lower elastic member 950... lower connection member
960... Lower support plate 962... Handle
964... Rail unit P1... 1st position
P2... second position S50... alignment step
S100... first adhesion step S200... second adhesion step
S300... separation steps d1,d2,d3,d3'... length

Claims (12)

An upper jig equipped with a heating plate whose temperature is raised for the thermocompression process;
A lower jig on which the object to be thermocompressed is seated; Including,
The heating plate includes a first heating plate and a second heating plate facing different areas of the object to be thermocompressed,
When the upper jig descends and presses the object to be thermocompressed and the lower jig, the first heating plate and the second heating plate are in close contact with the object to be thermocompressed,
Tilting or flatness between the first heating plate and the object to be thermocompressed, and tilting or flatness between the second heating plate and the object to be thermocompressed are adjusted separately,
The first heating plate and the second heating plate are spaced apart,
The separation distance between the first heating plate and the second heating plate is adjusted to mutually limit shaking caused by the heating plates colliding with each other during heat compression,
The heating plate includes an upper support plate suspended in the air,
The heating plate is suspended at a predetermined distance from the upper support plate by an upper elastic member,
An upper connection member is provided to connect the heating plate and the upper support plate,
The horizontal positions of the upper elastic member and the upper connecting member are different from each other,
The lower jig includes a seating plate on which the object to be thermocompressed is seated, and a lower support plate supporting the seating plate,
The seating plate moves along the horizontal direction together with the lower support plate,
By horizontal movement, the seating plate is switched between the first position and the second position,
The first position is a position at which the object to be thermocompressed is thermocompressed during the thermocompression process,
The second position is a jig device where steps other than thermal compression of the object to be thermally compressed are performed during the thermal compression process.
delete According to claim 1,
The heating plate is connected to the upper support plate by an upper elastic member,
Before the object to be thermocompressed is thermocompressed, the upper elastic member is relaxed and the heating plate is spaced a predetermined distance from the upper support plate,
When the object to be thermally compressed is thermally compressed, the upper elastic member is contracted and the heating plate is in close contact with the upper support plate.
delete According to claim 1,
A jig device arranged such that the direction of the division boundary between the first heating plate and the second heating plate is perpendicular to the direction of extension of the length of the object to be thermocompressed seated on the lower jig.
According to claim 1,
One end of the upper connecting member is fixed to the heating plate,
The other end of the upper connection member located on the upper support plate moves relative to the upper support plate,
A jig device in which the separation distance between the heating plate and the upper support plate is regulated by the upper connection member.
delete According to claim 1,
The seating plate is supported from the lower support plate by a lower elastic member and a lower connecting member,
The lower elastic member is inserted into the lower connection member and inserted between the seating plate and the lower support plate,
A jig device in which the seating plate is spaced a predetermined distance from the lower support plate by the lower elastic member.
delete According to claim 1,
An upper frame and a lower frame are provided to integrally connect the upper jig and the lower jig,
The upper frame and lower frame are connected to each other by side frames and are fixed to each other,
A jig device in which the upper frame and the heating plate are guided by the side frame and lowered as one unit when the object to be thermally compressed is thermally compressed.
According to claim 1,
By the thermocompression process, a rolling unit supporting the flexible display panel of the mobile device is manufactured,
The rolling unit includes a flexible metal plate and a support bar attached to the metal plate at a predetermined distance,
The object to be thermocompressed is a jig device including at least one of a thermocompression tape, a metal plate, and a support bar.
According to claim 1,
By the thermocompression process, a rolling unit supporting the flexible display panel of the mobile device is manufactured,
The rolling unit includes a flexible metal plate and a support bar attached to the metal plate at a predetermined distance,
The thermocompression process includes a first adhesion step and a second adhesion step,
In the first adhesion step, the heat-compression tape is attached to the metal plate at predetermined intervals, and in the second adhesion step, the support bar is attached to the metal plate to which the heat-compression tape is attached.