Inspection device

Abstract

The invention provides an inspection device capable of performing a stable printing state inspection no matter what the observation object is.The inspection device is used for inspecting the printing state of words or figures printed on the outer surface of an object (X), which is characterized by comprising an illumination unit, an image recognition unit (2) and a controller (4).The illumination unit comprises an LED (1) and the LED (1) can be switched to emit homogeneous light of different colors on the outer surface of the object (X).The image recognition unit (2) is used for viewing the illuminated words or figures of the object.The controller (4) receives the image information from the image recognition unit and determines whether the printing state of the words or figures is qualified or not.

Description

technical field [0001] The invention relates to inspection devices for objects. In particular, it relates to an inspection device for judging the quality of characters or graphics printed on the surface of a plastic molded product. Background technique [0002] On the plastic molded product, such as the cap of a plastic pen such as a ballpoint pen, the name of the manufacturing and sales company or a character or figure indicating the nature of the pen is printed. The printing is performed mechanically, automatically and continuously by means of pad printing machines (often also called pad printing machines). However, printing errors may occur such that printed characters or graphics are not printed at predetermined positions, or are partially missing or not clearly printed. Conventionally, as a method of discovering such defective products, people have visually inspected them using a magnifying glass or the like. [0003] In addition, as a method of mechanically performi...

AI Technical Summary

Problems solved by technology

[0004] However, with the former method, inspection errors due to fatigue inevitably occur, and there are problems such as variations in inspection standards depending on the inspector.

[0005] Also, with the latter method, there is a problem in inspection accuracy depending on the type of target object

In particular, when the object is the cap of a recording pen, depending on the combination of the color of the cap itself and the color of the characters or graphics, there is a problem that the image cannot be recognized well, or when the cap is a transparent object such as plastic In the case of the pen cap, there is a problem that the internal structure of the pen cap can be seen through and recognized as an image, etc.

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