JPS6337237A - Apparatus for measuring adhesion strength of film - Google Patents

Abstract

PURPOSE:To detect the adhesion strength of a film with high accuracy, by a method wherein a temp. regulator and a film plate (specimen) fixing jig are provided to a specimen mount stand and a cutting blade is pressed to the film on a film plate to cut the same and the cutting pressure of said blade is detected to be subjected to wave form analysis by a personal computer. CONSTITUTION:A film plate (specimen) 5 is fixed to the fixing jig 6 of a specimen stand 4. Further, connection members 10, 11, 15 are assembled and a slide member 14 is provided to the member 15 while a guide shaft 16 is provided to the member 14 and a cutting blade 17 is mounted to said shaft 16 in an up-and-down movable manner. A wt. 19 is further placed on the upper part of the guide shaft 16. Then, the cutting blade 17 is pressed to the film plate (specimen) 15 and the specimen mount stand 4 is allowed to slide to cut the film on the film plate 15. The interface resistance force of the cutting blade 17 is detected by a detector 21 and wave form measuring data is processed according to a Fourier transform program by a personal computer 24 to output information. Further, a temp. regulator 25 is provided in the specimen amount stand 4 to control the temp. of the film plate (specimen) 5. Since the interface cutting resistance force of the cutting blade 17 is processed by the personal computer for wave form analysis, the adhesion strength of the film can be measured with good accuracy.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is a method for quantitatively measuring the adhesion strength of a paint film applied to an object to be painted, and for understanding the deterioration tendency of the paint film. This invention relates to a film adhesion strength measuring device.

[Conventional technology]

Figure 6 shows, for example, WK Aspec Paint and Burnish Productions, [W
, K.' Asbeck, Palnt and V.
arnj, 5hPrOauCttOn, ] (/97
The conventional paint film adhesion measuring device shown in the March 23, 2013 issue is shown (~, in the figure, the cutting blade (17) is removably attached to the cutting blade mounting base (RI/). The arm (ri 2) supports the cutting blade mounting base (0) and has an axis (yy) so that the cutting blade (/7) can be pressed against the interface between the coating film and the material.
It has a rotation mechanism that uses the fulcrum as the fulcrum. The detector (fort) is for detecting the cutting resistance of the coating film. arm(
11, 2) are equipped with a film thickness gauge (DaS) and a weight (DaA) for measuring the coating film thickness. The arm support base (q) to which the arms (4, 2) are attached is moved up and down by the operation of the rotary tool (tl). The holder (19) holds the arm (p, 2) up when not measuring.

Threaded rod (S) supported in bearings (i/) (tx)
Oy> has a movable platform (5q)
Furthermore, when the column (left 5) is fixed, the arm (+, 2) connected to the column (sg) is rotated by the motor (S'O). The cutting blade (/7) attached to will move from side to side. Painted board (
S) is attached to the painted plate mounting stand (6 on the left).

(5ri) is the support of the device, and (3g) is a recorder for recording interfacial cutting resistance force measurement data.

With the above configuration, the painted board (evening) is attached to the painted board mounting stand (left 3).
) and press the cutting blade (17) against the interface between the paint film and the material on the painted board (3). Adjust the height of the arm support (4) according to the thickness of the painted board (3). Adjust.

Next, when the coating film is peeled off, a force in the upward direction acts on the cutting blade (/ri), so the cutting blade (/ri) is subjected to a heavy load D C+'A). The cutting blade (
Move the arm (4, 2) on which the /7) is attached, peel off the paint film with the cutting blade (/7), and detect the cutting resistance force at the paint film interface with the detector (Kuku). Record with a recorder (sg). At the same time, the film thickness is continuously measured using a differential transformer type film thickness meter (lid).

[Problem that the invention seeks to solve]

Conventional paint film adhesion strength measuring devices such as those described above measure the coating plate (
j) The height of the arm support (q) must be adjusted according to the thickness of the material, and since a lathe table is used, it must be made large, and waveform data cannot be recorded on a recorder. There were problems such as data analysis being difficult because it was displayed as is.

This invention was made to solve the above-mentioned problems, and the cutting blade can be set regardless of the thickness of the material of the painted plate, and by adopting a bearing mechanism,
The purpose of this invention is to obtain a coating film adhesion strength measuring device that has a simple structure and can be made at low cost, and that performs waveform analysis using data analysis using a computer.

[Means for solving problems]

The coating film adhesion strength measuring device according to the present invention has a sample mounting table that has a temperature controller and a sample fixing device and is movable horizontally and linearly. It is equipped with a blade support, a mechanism for adjusting the contact angle of the cutting blade, a pressure detector that detects the interfacial cutting resistance force generated when cutting the coating film of the cutting blade, and a personal computer for waveform analysis.

[Effect]

In this invention, a computer performs Fourier transform processing to obtain data regarding the adhesion strength of the coating film and the material strength.

〔Example〕

FIG. 1 shows an embodiment of the present invention, in which a sample mounting stage (lI) is fixed to a sliding member (3) that is pivoted to a guide shaft (k) fixed to a support base (1). , Painted board as a sample (
j) is mounted on the sample mounting table (ri) by the sample fixing device ^(6). A threaded rod Ct is screwed into a nut connected to the sample mounting table, and one end thereof is connected to a motor (9). 'The sliding member (3) can be horizontally and linearly displaced by being immersed in the guide shaft (c). A guide shaft (lI) fixed to the abutment (1) via a connecting member (10)
) the sliding member (1) slides on the The sliding member (connecting member (/3) fixed to 80 is connected to the connecting member (80) fixed to sliding member (Ha0), and the guide shaft (16) One end of the guide shaft (/A) serves as a support for the cutting blade (11), and the other end forms a threaded rod that holds the cutting blade holding knob (/l) and the heavy duty #) (/ 9) is arranged.The weight (/9) adjusts and sets the pressing force of the cutting blade (17) to the painted plate (S).The connecting member (1
, 1) is pressed against the other connecting member (13), and the cutting blade (17) is pressed against the other connecting member (13).
The tip can be adjusted so that it is parallel to the surface of the sample material.

The pressure detector (,2/) fixed to the connecting member (10) detects the repulsive force generated on the cutting blade (/) via the sliding member (7,2) and the connecting rod (2). . The measurement data is 1) AD converted using an AD converter (Ko2), and then sent to a computer (,
24t), processes the waveform using a Fourier transform program, and outputs a Fourier spectrum and a graph of the power spectrum autocorrelation function. A temperature regulator (:11), such as a thermo module, regulates the temperature of the sample.

According to the above configuration, the test sample has a length of - for example, length/3
Using a coated plate (, 1) with θam, width θ, and thickness/Ill, a portion of the coating film is peeled off by 2cIl to expose the material. Attach this painted plate (ri) to the sample mounting table (lI) so that it is in close contact with the tool (6), apply the cutting blade (17) of the blade width dato to the exposed part of the painted plate ((), and apply the weight ( /9
) is applied so that a force of 60θy is applied to the painted plate Ck). Adjust using a micrometer (20) so that the tip of the cutting blade is in parallel contact with the sample surface.

The painted plate (J) is moved by a motor at a speed of 1iI/yux, and the connecting rod (-
1) The pressure sensor (21) detects the interfacial cutting resistance force of the cutting edge (l) transmitted through the pressure sensor (21). First, the material part is cut by &1m, and then the coating part is cut by /S. The temperature of the coated plate is adjusted to a constant temperature in the range of -10°C to AD°C using a thermo module (X, t).

Figure 2 shows the cutting resistance force at the coating film interface, where the vertical axis shows the cutting resistance force (kg) at the coating film interface, and the horizontal axis shows the cutting pressure I at the coating film interface.
II! (am) is taken.

The measurement data appears as a waveform, where (A) is the cutting resistance force on the surface of the material, and (B) is the cutting resistance force at the interface of the coating film.

Figure 2 is a graph corresponding to Figure 2 showing the interfacial cutting resistance when the material surface treatment of epoxy electrodeposition coating is changed. If the processing is different, the same figure (a), fb) and (c)
As shown in , the adhesion strength differs, and the interfacial cutting resistance force and waveform change.

Figure 2 shows the waveform analysis program 7th-Chard, and the measurement data (2/) of the interfacial cutting resistance force is transferred to the AD converter (
7λ), input it to the computer (?3), output the graph, and then input the processing range from the screen with the cursor (7λ) to output the information file (?yo) for the next Fourier transform program. do.

Based on this information file, the measurement data is processed, the data is given to the Fourier transform routine (7t), and the transform result is output to a file.

Input each file of the Fourier spectrum, power spectrum, and autocorrelation function i~, and output the graph (
? ri).

Figure 5 shows a power spectrum diagram obtained by Fourier transforming the interfacial cutting resistance force of urethane paint17, where the horizontal axis is the frequency (cps) and the vertical axis is the power spectrum (cII
l/5ecJ). In the 760°C heat resistance test, the power spectrum tends to decrease and the vibration frequency tends to increase as the heating time increases.

Interfacial cutting resistance is a combination of coating film adhesion strength and material strength7.
The form of the destruction is recorded as a waveform. By Fourier transforming these measured values and performing waveform analysis, it is possible to obtain information to elucidate the essence of the phenomenon.

In the above embodiment, a general coated plate having a thickness of several 10 μm or more was described, but a coated film on a plastic plate may also be used, and the same effects as in the above embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, there is provided a sample mounting table that has a temperature controller and a sample fixture and is linearly displaced horizontally, and a cutting blade support that is linearly displaced vertically at right angles to the displacement direction of the sample mounting table. It is equipped with a cutting blade contact angle adjustment device, a pressure detector that detects the interfacial cutting resistance force generated when cutting a multi-blade paint film, and a PC for waveform analysis, making synchronization inexpensive. In addition, highly accurate measurement results can be obtained.

[Brief explanation of drawings]

Figures 1 to S show an embodiment of the present invention, with Figure 1 being a front view, Figure 2 being an interface cutting distance-interface cutting resistance characteristic diagram, and Figure 1 being a coating applied to various chemically treated surfaces. It is a frequency-power spectrum characteristic curve diagram obtained from the interfacial cutting resistance force characteristics of the deposited epoxy-based electrodeposition paint. Figure 5 is a front view of a conventional electronic device for measuring coating film adhesion strength. (ri)...Sample mounting table, C1)...Painted plate (sample), (
6)...Sample fixture, (7), (/:l), (/ri)・
・Sliding member, (16)... Cutting blade support, (17)...
9 cutting blades, (19)...weight, (ko/)...pressure detector,
(-〇)...Micrometer (adjuster), (,2F
)...PC, (2 ma)...Temperature controller. In each figure, the same reference numerals indicate the same or corresponding parts. 1 figure 17゛ control η 19 vsu 21 pressure cypress chi answer 25 2 y yaya answer V use of it 6h cut face g hase (b) (C) %s PS compared to drawing board t71) 1000 continuation? City official letter (spontaneous) '[7 Director General of License Agency F9 1 Indication of matter i'I Patent application No. 1988-61178759 2,
Name of the invention: Paint film adhesion strength measuring device 3, if amended, relation to the case Patent applicant address: 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name: fho (601) Mitsubishi Electric Corporation Representative: Shi
Mamoru Ki 11 Agent Address: 4-6, Marunouchi Building, 2-4-1 Marunouchi, Chiyoda-ku, Tokyo, Contents of amendment (1) 4th floor, No. 300, line 9 r(53) l to r(56) )
J and correct 1, (2) Same 5th (τ [10th -] ('Input in j line l,
) Output to file (34) 7. Input 1 to " and output to file (34) 9. File (34)"
Then, from that screen, manually select the processing range with the cursor and start the next Fourier transform program (3ri).
) to process the J1 measurement data and output the conversion result to a file and correct it as JJ1, 1. (3) Correct Figures 1 and 4 as shown in the attached sheets. Doyuyaro N) Figure 4

Claims (1)

[Claims] A sample mounting table that has a temperature controller and a sample fixing device and can be linearly displaced horizontally; a cutting blade support that can be linearly displaced vertically at right angles to the displacement direction of the sample mounting table; and a lower end of the cutting blade support. a cutting blade that is attached to the section and presses against the sample on the sample mounting stand; a weight that is disposed at the upper end of the cutting blade support and adjusts the pressing force of the cutting blade against the sample; A coating film adhesion strength measurement device comprising: an adjustment tool for adjusting the contact angle; a pressure detector for detecting the interfacial cutting resistance force generated on the cutting blade; and a personal computer for waveform analysis of measurement data.