JPS61116648A - Penetration flaw inspection - Google Patents

Abstract

PURPOSE:To achieve a coating efficiency, by mounting a lid body fitted with a porous or fibrous brush body, pen body or the like to a bottle body holding a penetrant or a developing agent to coat the penetrant or the like at a point to be inspected by using it. CONSTITUTION:A brush body 3 or a pen body made of porous or fibrous material, for example, wool felt as lid body 2 is mounted to a bottle body 1 holding a penetrant and a developing agent to form a coating tool. The penetrant or the like can be coated at the desired location by the required amount simply by applying it at the part to be inspected holding the coating tool with a hand. Thus, the penetrant can be coated efficiently in a very simple and easy manner.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a penetrant inspection method for detecting open flaws on the surface of metals, plastics, ceramics, etc.

[Conventional technology]

The penetrant inspection method consists of (1) applying a penetrating liquid to the surface of the test object by spraying or brushing and allowing it to penetrate into the cracks opened on the surface of the test object, and (2) removing any excess penetrant that has adhered to the test object. After removing the liquid with a washing liquid and drying the washing liquid, (3
) When a developer is applied to the surface of the specimen, the penetrating liquid in the scratches is drawn out, and a defect indicating pattern appears on the developer coating, thereby detecting the scratches.

[Problem that the invention seeks to solve]

When penetrants and developers are applied using conventional methods, they also adhere to unnecessary areas, requiring considerable effort to remove them. In particular, it is very difficult to remove penetrating liquid that has adhered to the body or clothing.

If there is a large amount of penetrating liquid adhering to unnecessary areas, not only will the cleaning liquid be wasted, but wastewater treatment will require a lot of labor and expense, and solvent vapor and fine developer powder will float around, causing health and safety issues. I didn't like the top either.

Particularly when the width of the inspection area is narrow, such as when inspecting a welded area, if the penetrating liquid or developer is sprayed, a large amount may adhere to unnecessary areas or become atomized and become suspended in the air. In addition, when applying with a brush, the no-ke must be repeatedly soaked in the container, and between the time it is applied, the liquid may fall from the tip of the brush and make a mess, or the container may be knocked over, making it difficult to handle. Ta.

[Means for solving problems]

The present invention provides a bottle containing a penetrating liquid or a developer, and a porous or fibrous pen body, a brush body, or a pen body as a lid body.
This is a penetrant testing method that is characterized by applying a penetrant or developer to a specimen using an applicator equipped with a shell.

The bottle body is manufactured using one or more of glass, metal, synthetic resin, ceramics, etc.

The cap may be a porous or fibrous pen, brush, or brush body attached directly to the mouth of the bottle, or a cap with a pen, brush, or brush body attached to the mouth of the bottle. It may be attached by screwing or gluing.

For the pen, brush, or... pen body, one or more of porous synthetic resin, rubber, animal hair, animal fiber, vegetable fiber, synthetic fiber, inorganic fiber, etc. are used.

As the penetrating liquid to be put into the bottle, a known liquid containing 1 to 3% by weight of a coloring dye or a fluorescent dye in a solvent is used. In addition, the developer generally contains a white inorganic pigment in a solvent for 10 to 10 minutes.
Although 15% by weight of the white inorganic pigment is used, it is preferable to use 25 to 50% by weight of the white inorganic pigment based on the solvent since the coating film is thin when the developer is applied with the applicator used in the present invention. Regarding the developer, it is also effective to use a known method in which the pigment is sufficiently dispersed in a solvent and then glass beads or the like are placed in the bottle for use. Furthermore, if the developer in the bottle is applied directly to the pen body, brush body, or no. When a known device for feeding the body or the body is attached to the inside of the bottle, sufficient pigment is also applied so that the defect indicator pattern is easily visible.

〔Effect of the invention〕

Since the applicator containing the penetrating liquid or developer can be easily dispensed by holding it in the hand, the penetrating liquid or developer does not adhere to unnecessary parts of the subject or clothes. Also, there is no scattering due to spraying or dripping like in the case of no-ke coating.
It is preferable from a safety and hygiene perspective as it requires less consumption.
When the test object is washed after penetrant testing, the amount of wastewater to be treated is reduced, and the processing effort and cost can be significantly reduced.

〔Example〕

1 to 4 are diagrams of applicators used in testing the penetrant testing method of the present invention.

FIG. 1 is a perspective view of the applicator, in which 1 is a bottle body and 2 is a lid, both of which are made of synthetic resin. In case 3, wool felt was used as the blank body.

FIG. 2 is a side view of the coating diagram of FIG. 1. 1 is a bottle body,
2 is a lid part, and 3 is a hole body.

FIG. 3 is a sectional view taken along the line AA' of the applicator shown in FIG. 2, with a cap attached. 1 is a bottle body, 2 is a lid, 3 is a brush body, and 4 is a cotton-like fiber made of wool and polyacrylonitrile fiber. 5 is a cap to prevent the bottle from drying out, and 6 is a backing to prevent liquid from leaking between the lid and the bottle. A penetrating liquid is used as the content liquid.

FIG. 4 is a sectional view taken along the line AA of an applicator which has the same external appearance as FIG. 2 but has a different internal structure, and is an applicator for developer. 1
1 is a bottle body, 2 is a lid, 3 is a brush body, and 5 is a cap to prevent the brush body from drying out.

When applying the developer, shake the applicator, use the glass beads numbered 11 to sufficiently disperse the pigment in the solvent, and press the brush body.The number 8 fixed to the brush body acts as a piston, creating a force that pushes the brush body. When released, spring 9 pushes the brush body. At this time, the developer can be sucked into the inner container 10 through the hole 7 and impregnated into the brush body 3, so that when applied, the amount of pigment applied increases and the defect indicating pattern becomes clearer.

Table 1 shows an example of the composition of the penetrating liquid and developer to be introduced into the bottle. Examples 1 and 2 are solvent-removable penetrants that wash excess penetrant with a petroleum solvent, and Examples 3 and 4 are water-washable penetrants that wash excess penetrant with water. These are the ones used in conventional spray and brush applications. Comparative Example 1 is a quick-drying developer that is conventionally used for spraying or brush painting, and Examples 5 to 7 are quick-drying developers in which the proportion of pigment is 3 to 4.5 times that of the conventional one. be.

In the test, a type A comparison test piece specified in JIS Z2343 was used as a test object, a penetrant was applied thereon, and after washing and drying, a developer was applied.

In the combinations of the penetrating liquids of Examples 1 to 4 and the developers of Examples 5 to 7, the defect indication patterns were also clear and good;
When the developer was applied to the combination of the penetrating liquid of Examples 1 to 4 and the developer of Comparative Example 1, there was a lack of pigment applied to the test object, resulting in some areas becoming unclear.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an applicator used in the penetrant testing method of the present invention. 2 is a side view of the applicator of FIG. 1; FIG. Figure 3 shows the applicator A- in Figure 2 used to apply the penetrant.
It is a sectional view of A'. FIG. 4 is a sectional view of the applicator AA' shown in FIG. 2 used for applying developer. Patent applicant Nippon Oil & Fats Co., Ltd. Figure 1: ? 2 figure 1 to tusk 3 figure

Claims (1)

[Claims] (1) Apply the penetrant or developer to the subject using an applicator consisting of a bottle containing the penetrant or developer and a porous or fibrous pen, brush, or brush body attached as a lid. A penetrant inspection method characterized by applying