Radiographic inspection device for film product reels, method for manufacturing film product reels using the same, and method for radiographic inspection of film product reels

The radiotransmission inspection device addresses the challenge of detecting small foreign matters in film product reels by transmitting radiation radially and using image processing, achieving high-sensitivity detection across wider reel widths.

JP7647551B2Active Publication Date: 2025-03-18TORAY INDUSTRIES INC
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Patent Information

Application Number
JP2021520438
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-08-26
Filing Date
2021-04-12
Publication Date
2025-03-18
Estimated Expiration
2041-04-12

AI Technical Summary

Technical Problem

Existing radiotransmission inspection devices struggle to detect small foreign matters, especially metals less than 100 μm, in film product reels with varying widths, due to differences in detection sensitivity and physical interference.

Method used

A radiotransmission inspection device that transmits radiation radially to the circumferential surface of the film product reel, using a pair of radiation sources and detectors, and an image processing unit to generate foreign matter detection images, allowing for high-sensitivity detection across wider reel widths.

Benefits of technology

The device achieves high-sensitivity detection of foreign matters, including small metals, across wider reel widths, enabling effective inspection and reducing the risk of false positives or negatives.

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Abstract

[Problem] To provide an inspection device capable of detecting minute foreign matter included in a film product reel of wound film conveyed at high speed, the detection including detection of whether the foreign matter is metallic, and a film product reel manufacturing method using this inspection device. [Solution] A radiation transmission inspection device for inspecting for foreign matter included in a film product reel (1) of elongated film (3) wound multiple times around the outer circumferential surface of a core (2), the radiation transmission inspection device for a film product reel comprising a placement table upon which the film product reel is to be placed, a pair consisting of a radiation source (4) and a detector (6) for causing radiation to pass through the circumferential surface of the film product reel in the radial direction and receiving the radiation, and an image processing unit for generating a foreign matter detection image from a radiation detection result obtained by the detector.
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