Rolled film body, manufacturing method and inspection method thereof
A technology of film winding body and core body, which is applied in the direction of winding strips, final product manufacturing, secondary battery manufacturing, etc., and can solve problems such as plastic deformation, product appearance deterioration, and adverse effects on the quality of slitting films.
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Embodiment approach 1
[0094] based on Figure 6 ~ Figure 9 A first embodiment of the present invention will be described.
[0095] "Structure of Convoluted Body"
[0096] The wound body is obtained by winding a slit separator (film) obtained by cutting a roll material in the longitudinal direction around a core body. The wound body 10 ( Figure 8 ) can suppress inclination in the width direction on the outer peripheral surface t of the slitting separator 9 by winding the slitting separator 9 around the core 8 . The structure of the wound body 10 will be described in order below.
[0097] (core body)
[0098] Figure 6It is a figure which shows the structure of the core body 8 of the wound body 10 of this embodiment, (a) is a front view, (b) is a cross-sectional view which shows the A-A cross section of (a), (c) shows a core body The sectional view corresponding to (b) of the manufacturing method of 8, (d)-(e) is a sectional view which shows the other structure of the range E of (b). It shoul...
reference example 1
[0140] exist Figure 8 In the structure of (c), the orientation of the split diaphragm 9 is opposite to that of the structure of (b) with respect to the Y-axis direction. Further, the thicker portion of the slit separator 9 is wound on the thicker portion α side of the outer cylindrical portion 81 . As described above, at the part of the outer cylindrical part 81 corresponding to the thicker side of the slit diaphragm 9, a force that tightens inward acts. However, since elastic deformation is smaller on the thicker portion α side of the outer cylindrical portion 81 than on the thinner thickness portion β side, the split diaphragm 9 has to be plastically deformed. That is, since the core body 8 does not elastically deform, it cannot absorb the amount of deformation when the slitting diaphragm 9 is stretched, so the slitting diaphragm 9 is plastically deformed. Therefore, the slit diaphragm 9 rolled out from the core body 8 is as Figure 9 bend as shown in (b).
[0141] The ...
reference example 2
[0143] Figure 8 In the structure of (d), the thickness distribution of the outer cylindrical part 81 is not inclined with respect to the structure of (b). The thickness of the outer cylindrical portion 81 is uniform from the side of the part α to the side of the part β. Therefore, the rigidity of the outer cylindrical portion 81 is also uniform from the side of the portion α to the side of the portion β.
[0144] At this time, the thicker portion of the slit separator 9 is also more tightly wound than the thinner portion. Therefore, the amount of deformation at the portion β of the outer cylindrical portion 81 is larger than the amount of deformation at the portion α. Furthermore, the inclination of the outer peripheral surface t of the split diaphragm 9 is suppressed. The degree of this suppression can vary depending on the strength of the outer cylindrical portion 81 . This strength can vary depending on the thickness or material of the outer cylindrical portion 81 .
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Abstract
Description
Claims
Application Information
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