JP2002192232A - Apparatus for straightening warp on thin plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for straightening warp on a thin plate capable of preventing scratches on a material being straightened as well as inhibiting the transfer of oil from rollers by separating the material being straightened from rollers. SOLUTION: An apparatus for straightening warp on a thin plate has a roller leveler part 3 for straightening warp on the thin plate including a metal plate. Between rollers 5, 5' provided vertically and alternately which constitute the roller leveler part 3, two film materials 12, 13 pinching a material being straightened 1 vertically are provided. With the material being straightened 1 pinched between the film materials 12, 13, it is conveyed at the same speed as that of the film materials 12, 13 to straighten the warp on the material being straightened 1. The film 12, 13 are provided between the material being straightened 1 and the rollers 5, 5', so that the contact between the rollers 5, 5' and the material being straightened 1 are interrupted, thereby preventing scratches on the thin plate, i.e., material being straightened 1, and inhibiting the transfer of the oil from rollers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for correcting warpage of a thin plate made of metal and a film, such as a TAB tape, in a manufacturing process.

[0002]

2. Description of the Related Art Conventionally, as a method of correcting the warpage of a thin metal sheet, a method of reducing the degree of warpage by bending the thin metal sheet in a direction opposite to the direction of the warp until reaching a plastic deformation region is generally used. is there. This can be realized by winding around a roller having a diameter suitable for the thickness of the sheet metal to be corrected.

[0003] Japanese Patent Application Laid-Open No. H10-100016 and Japanese Patent No.
As described in Japanese Patent No. 70570, a method in which a number of rollers rotating at the same speed are alternately arranged vertically and a material to be corrected is passed between the rollers, and a warpage generally called a roller leveler is adopted. There is a thin plate manufacturing device provided with a straightening device. In the correction method using a roller leveler, the material to be corrected is sandwiched between upper and lower rollers that rotate, and is corrected while being conveyed. According to such an apparatus, it is possible to eliminate the warpage of the material to be corrected by changing the distance between the upper and lower rollers and adjusting the amount of plastic deformation applied to the material to be corrected.

[0004]

However, when such a device is used, the surface of the material to be corrected comes into contact with the upper and lower rollers, so that the surface of the material to be corrected is generally damaged by the contact with the roller. It is easy to stick. Further, since lubricating oil is used for the bearing for rotating the roller, the oil adheres to the surface of the material to be corrected. As described above, the conventional thin sheet metal warpage correction apparatus employing the roller leveler method has a drawback that the surface of the material to be corrected after the warp correction process is damaged or oil adheres.

For this reason, in a general metal thin plate manufacturing process, it is necessary to remove the scratches and oil by performing a leveling process in a surface treatment process after the warp correction process. Further, in the case of a thin plate composed of metal and a film, such as a TAB tape, a surface treatment step cannot be provided after the straightening step to perform the surface conditioning treatment. Warp correction technology was needed.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a thin plate warp straightening device capable of cutting off contact between a roller and a material to be straightened and preventing the occurrence of scratches on the straightened material and oil transfer from the roller. I do.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided an apparatus for correcting warpage of a thin plate, comprising a roller leveler for correcting warpage of a thin sheet containing metal.
A roller leveler comprising two film strips sandwiching the material to be corrected from above and below between rollers arranged alternately up and down, wherein the two films are sandwiched between the films to be corrected. The material is conveyed at the same speed as the strip material to correct the warpage of the material to be corrected.

In the present invention, preferably, an unwinding mechanism for unwinding the film strip to the entrance of the roller leveler, and winding the film strip passed through the roller leveler at an exit side of the roller leveler. A film transport device comprising a winding mechanism is provided for each of the two film strips.

In the present invention, preferably, the material to be corrected has a thickness in the range of 1/3 to 2 times the thickness of the material to be corrected, and the Young's modulus is an average Young's modulus of the material to be corrected. It is characterized by being smaller than the ratio.

In a roller leveler according to the present invention, if a film is disposed between the material to be corrected and the roller, the contact between the roller and the material to be corrected is cut off, and the thin plate as the material to be corrected is damaged. Generation and transfer of oil from the roller can be prevented.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic side view of a roller leveler device showing an embodiment of a thin plate warp correcting device according to the present invention. The thin plate warpage correction device of the present embodiment includes, for example, a work input unit 2 that inputs a thin plate correction material 1 made of metal and a film, such as a TAB tape, and a roller leveler unit that corrects the warpage of the correction target material 1. 3 and a work take-out section 4 from which the corrected material 1 'can be taken out.

In the roller leveler section 3, a plurality of straightening rollers 5, 5 'are rotatably arranged on supporting frames 6, 7 so as to be able to straighten a thin plate alternately up and down. Both ends of the support frames 6 and 7 are pushed in, and the adjustment screws 8 and
9 is connected. The support frame 6 is screwed with the pushing amount adjusting screws 8 and 9. On the other hand, the support frame 7 is attached so that the relative position does not change with the push-in amount adjusting screws 8 and 9. The relative distance between the supporting frame 6 and the supporting frame 7 is changed by rotating the pushing amount adjusting screws 8 and 9, and the pushing amount of the material to be corrected by the upper and lower rollers 5 and 5 ′ is adjusted. Can be done. In addition, in order to measure the relative distance between the support frame 6 and the support frame 7, the push-in amount for reading the push-in amount near the position where the push-in amount adjusting screws 8, 9 at both ends of the support frames 6, 7 is provided. Dial gauges 10 and 11 are provided.

In addition to the above structure, in the present invention, the films 12, 13 for vertically sandwiching the material to be corrected are disposed between the correction rollers 5, 5 'alternately arranged vertically, and A mechanism for transporting the material 1 at the same speed as the films 12 and 13 is provided.

The work inputting section 2 of the roller leveler device has unwinding sections 14 and 1 for upper and lower films 12 and 13.
5. The work take-out section 4 is provided with winding sections 16 and 17 for the films 12 and 13, respectively. The unwinding units 14 and 15 and the winding units 16 and 17 respectively unwind or roll the film 12 or the film 13 or rolls 14a, 15a, 16a and 17a.
And rotatable guide pulleys 14b, 15b, 16 for guiding the tape transport path passing through the roller leveler unit 3.
b and 17b.

On the film unwinding portions 14 and 15, the back tension is applied to the films 12 and 13.
A mechanism (not shown) for applying a winding tension to the workpieces 2 and 13 is provided in the work input unit 2 and the work removal unit 3 respectively. Rolls 14a, 15a, 16
Reference numerals a and 17a rotate in the unwinding and winding directions, respectively, via driving means such as a motor (not shown). The rolls 5 and 5 'are also provided with a driving means such as a motor (not shown). The transport speed of the films 12, 13 passing through the roller leveler unit 3 is defined by the rotation speed of the rolls 5, 5 '.

According to the warp correcting apparatus of the present embodiment thus configured, the material to be corrected 1 is placed on the film 13 on the unwinding side, conveyed together with the film 13, and on the way, on the upper side. It is sandwiched between the film 12 and the lower film 13 and enters the roller leveler section 3 as it is. In the roller leveler section 3, the rolls 5 and 5 'rotate while being pressed against the material 1 to be corrected in a predetermined direction. Thereby, the material to be corrected 1 is warped and transported to the outlet side. Thereafter, the corrected member to be corrected 1 ′ sandwiched between the upper and lower films 12 and 13 on the outlet side is placed on the film 13 by winding the film 12 through the winding unit 16. Is transported to a position where it can be taken out via the winding unit 17.

Here, the films 12 and 13 of the present invention are equal to or less than the material to be corrected so that the material 1 to be corrected is given a warp in a predetermined direction that can be corrected through the correction rollers 5 and 5 '. Has the following thickness and hardness. In practice, it is desirable that the film has a thickness in the range of 1/3 to 2 times the thickness of the material to be corrected 1 and a Young's modulus smaller than the average Young's modulus of the material to be corrected. . Here, the average Young's modulus of the material to be corrected is a load average value in consideration of the thickness of a plurality of materials constituting the material to be corrected.

EXAMPLE The roller leveler 3 had a diameter of 10 mm and a width of 2 mm.
Rollers 5, 5 'of 20 mm are alternately arranged 13/14 on the upper and lower sides, respectively, and each roller 5, 5' is provided with a rotation drive device. This roller leveler part 3
Before and after, unwinding sections 14 and 15 and winding sections 16 and 17 for upper and lower films 12 and 13 are provided, respectively. The upper and lower unwinding parts 14 and 15 have a thickness of 100μ.
A PET film having a length of 200 m, a width of 200 mm and a length of 500 m was set and used as upper and lower films 12 and 13.

As the material 1 to be corrected, a carrier tape made of polyimide having a thickness of 50 μm and copper having a thickness of 18 μm and having a width of 35 mm and a length of 190 mm was used.
On the copper, Ni is used for wire bonding with the chip.
Plating and gold plating are applied. Here, it is necessary that the gold-plated surface of the wire bonding portion does not cause scratches or oil adhesion in order to ensure the bonding with the chip.

The pressing amount on the inlet side of the roll leveler unit 3 was set to 0.4 mm, and the pressing amount on the outlet side was set to 0.1 mm. The warpage of the material 1 before charging was 2.5 mm, whereas the warping of the material 1 ′ after charging was 0.5 mm. 4
Observation of the gold-plated surface of the corrected material 1 ′ with a stereo microscope of 0 × revealed no generation of scratches or adhesion of oil.

[0022] After the Comparative Example Example, PET film 12,1 from the device
3 was removed, and the material to be corrected 1 was warped with the same amount of indentation as in the above example. Although the warpage of the material 1 before charging was 2.5 mm, the warpage of the material 1 ′ after charging was 0.5 mm, and the amount of warping was the same as that of the case with the PET film. Observation of the gold-plated surface of the corrected material 1 'with a 40 × stereo microscope revealed that four scratches occurred in one sheet, and 2
Oil adhesion was observed in several places.

[0023]

According to the present invention, it is possible to correct the warpage of a metal-containing thin plate without causing scratches and oil adhesion.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a leveler according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Member to be corrected (thin plate containing metal) 2 Work input part 3 Roll leveler part 4 Work take-out part 5, 5 'Straightening roller 6, 7 Supporting frame 8, 9 Push-in adjustment screw 10, 11 Push-in reading dial gauge 12 , 13 film 14, 15 unwinding part 14a, 15a unwinding roll 14b, 15b, 16b, 17b guide pulley 16, 17 winding-up part 16a, 17a winding-up roll

Claims (3)

[Claims] 1. A device for correcting a warp of a thin plate containing metal, comprising a roller leveler, wherein the material to be corrected is sandwiched between upper and lower rollers constituting the roller leveler. It is provided with two film strips, wherein the material to be corrected is conveyed at the same speed as the two film strips in a state sandwiched between the films to correct the warpage of the material to be corrected. Thin plate straightening device. 2. An unwinding mechanism that unwinds a film strip to an entrance of the roller leveler, and a winding mechanism that winds the film strip that has passed through the roller leveler at an exit side of the roller leveler. Composed,
The device for correcting warpage of a thin plate according to claim 1, wherein a film transport device is provided for each of the two film members. 3. The material to be corrected has a thickness in the range of 1/3 to 2 times the thickness of the material to be corrected and a Young's modulus smaller than an average Young's modulus of the material to be corrected. The device for correcting warpage of a thin plate according to claim 1 or 2.