JPS5898169A - Preparation of metal plate coated with synthetic resin - Google Patents

Abstract

PURPOSE:To obtain a metal plate coated with synthetic resin at a uniform application amount, by measuring the thickness of a synthetic resin film applied to the metal plate to be dried and baked by nondestructive Compton's scattering method just after the application of the resin. CONSTITUTION:After being pretreated, a metal plate 1 such as hot-dip zinc- coated steel sheet is carried through roll coaters 11, 11 to apply synthetic resin 3 to the plate 1. The thickness of the synthetic resin film 2 applied to the plate 1 is measured by a device 4 for measuring the thickness of the film provided just after the roll coater 11. Said measuring device 4 is equipped with a means for measuring Compton's scattering intensity scattered at the film 2 when radiation is applied to the film 2. Consequently, the thickness of the film 2 can be measured by measuring the intensity of a part of the scattered radiation having a wavelength corresponding to the substance in the film 2. According to this method, the thickness of the film 2 can be continuously measured without destructing the coated film.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a synthetic resin-coated metal plate, and
Between the process of applying synthetic resin to the surface of 1) and the process of drying and baking the applied synthetic resin coating M (2), immediately after the coating process, the synthetic resin coating (2) is irradiated with radiation. Production of a synthetic resin-coated metal plate characterized in that the thickness of the synthetic resin coating (2) is measured using a scattering method, and the coating thickness of the synthetic resin is adjusted according to the measured thickness. It concerns the law.

When manufacturing a synthetic resin-coated metal plate by applying a synthetic resin to the surface of a metal plate such as a steel plate, it is necessary to equalize the thickness of the synthetic resin coating on the surface of the metal plate. Therefore, it is necessary to measure the film thickness, and conventional measuring methods include gravimetric method, electromagnetic guide method, and scratch microscopy method.

The gravimetric method requires complicated operations such as punching out a test piece from a synthetic resin-coated metal plate, weighing it, peeling off the coating, washing it with water, drying it, weighing it, and measuring it, making the measurement time-consuming and prone to distortion and individual errors. It has the disadvantage that accurate measurements cannot be made and the measurements are discontinuous. Although the scratch microscopy method can perform measurements with relatively high accuracy, it has the disadvantage that it requires a sliding test, takes time to perform the measurement, and cannot be used for continuous measurements.

In addition, all of the above measurement methods involve measuring the film thickness after treating a metal plate with synthetic resin and baking it on a dry bed. 611] Even if you adjust the amount of synthetic resin applied based on the results, the synthetic resin has already been applied to some parts of the machine, and it is necessary to equalize the amount of application. ]-) Trolling is virtually impossible. That is, in order to quickly adjust the coating amount, it is necessary to apply a synthetic resin coating directly to the thread of the synthetic resin on the metal plate. In this regard, a rotary film meter (for example, a wet film meter manufactured by Elixesi) has traditionally been used to measure the thickness of an undried paint film. It is possible to measure.

However, this rotary film meter has different depths in the direction of rotation. It consists of a rotary gauge with a diameter of Since it is rolled onto a dry film, it leaves marks on the film, which cannot be made into a product, and is a unique destructive test. Therefore, this product cannot be used continuously over the entire length of the metal plate, but can only be used partially, and it is not possible to constantly roll the amount of application to make it uniform. He is self-centered.

From the tree - 1iJ: l;: Don't look down on yourself.
611], and can form a synthetic resin film on a metal plate with a uniform coating amount by non-destructively determining the film thickness of the synthetic resin film directly after applying the synthetic resin. The object of the present invention is to provide a method for manufacturing a fat-handling kankin snake plate.

The present invention will be explained in detail below using examples. FIG. 1 shows the overall outline of the apparatus used in the present invention. First, a metal plate (1) such as a galvanized steel plate is transferred to
In order to improve the adhesion between the metal plate (1) and the synthetic resin coating (2), the metal plate (6) is treated with a zinc phosphate or 0-mate compound. 1), then wash with water, and then pass through the dryer (7) to wash and dry. Next, adhesive roll coater (8)
5-7 y-/t dry weight through the metal plate (1)
n” wall Ili 1 Attachment 41L “Rio Kamasu A board (1
) and plate temperature 180~2 in 9V (1j furnace (9)
The enclosing agent is completely burned out under the conditions of 50° C. and 30 to 120 seconds, and then cooled with a cooler (10). Next, add polyvinyl chloride/nor resin to both concave portions of the metal plate f1+ (3)
Apply with dry H, 442, 100 to 400 f//m' coating 4'. Fall of synthetic resin (3) 11171
This is carried out using a zero-coater (11).

As shown in Fig. 2, the roll coater (11) has a resin receptacle filled with synthetic resin (3) in a tray (12).
The F city is immersed in the hiccup (13) and the specified...j gap is immersed in the hiccup
Military icidal roll (14) placed opposite to pa 3)
and an applicator decoy 6 which is rotatably driven in contact with the two parts of the spray roll (13).

That is, synthetic tree power'# (31 or raised, military 'Jl) 0-ru! At +41, the synthesis position (fat (;1+
The M of the synthetic resin (2) was adjusted to a constant value of 11''.
is further transferred to the buffer roll (1b1) and the buffer roll (1b1).
, Q5), a synthetic resin (3
) is applied using an applicator roll (15). Here, in order to achieve accuracy in the amount of synthetic resin (3) applied to the metal plate (1), the diameter of each roll is set to 1 after polishing.
The rotational speed of each roll was measured with an accuracy of /1005 m and the rotational speed of each roll was corrected according to the life speed.
50-170%, Hi Nkua υzu roll (13) is 180-200% of life speed, military,, I'
) 0- +1/ (141 should be set at the 5th to 8th ratio of life speed, and it is better to use a high-precision hydraulic tanabata to drive these rolls. Also, the paulownia material of the rolls is made of synthetic resin (
Polyurethane is better in terms of 3) coating properties, and the roll hardness is preferably between 58 and 62, with the target durometer of 60. However, even if the various settings are made as described above, the mechanism of the roll coater (11) is responsible for varying the amount of the synthetic resin (3) applied to the metal plate (1).

In other words, variations in the gap size between the military tally roll (13) and the military tally roll (14),
Examples include fluctuations in contact pressure between each roll.

Therefore, in the present invention, a film thickness measuring device (4) is provided immediately after the roll coater (11) to measure the film thickness of the synthetic resin film (2) applied to the metal plate (1). This film thickness measuring device (4) measures the amount of radiation that is scattered by the synthetic resin film (2) when radiation is irradiated onto the synthetic resin film (3).
It is equipped with a device that measures the scattering intensity of the radiation, and by measuring the intensity of the radiation scattered by the radiation irradiation, the intensity of the wavelength corresponding to the substance in the synthetic resin coating (2) is determined. The film thickness of the resin coating (2) is measured. Therefore, the film thickness can be measured by non-destructive testing without causing any damage to the synthetic resin film (2); It is also possible to measure the thickness of the synthetic resin coating (2) by applying the fluorescence In this method, the effects of zinc and lead, which are usually removed from metals (1) (see margins below).

occurs in the measured film thickness of the synthetic resin film (2), and
The measured value of the synthetic resin coating (2) will vary greatly due to variations in the υ medium thickness, and the measured value will also be affected by the effect of the metal elements contained in the pigment in the synthetic resin coating (2). Therefore, it is not possible to measure the film thickness with a positive value. Therefore, in the present invention, we focused on the fact that the synthetic resin is made of an element with a small number of electrons, such as C1H, ct/4-, and are not affected by metal elements. Film j9: This is a reminder to carry out measurements.

In this way, the synthetic resin * 11! is constantly applied to the metal plate (1) using the film thickness measuring machine (4). If! The film thickness of +2+ is measured, but if there is a change in the measured value of film thickness, feed bank ' = 5 from the film thickness measuring device (4) to the roll coater (11) and coat the synthetic resin ( Apply Cositrol in the amount of 3).

That is, for example, the applicator roll (16), the variable diameter roll (16), the applicator roll (16),
5) A load cell is installed on the IIJ of the toto/ν up roll (13), and the contact pressure of these rolls is detected to respond to the feed performance/υ from the film thickness measuring device (4),
Operate a hydraulic syringe to adjust the contact pressure of each roll, or put a matane scale between the rolls to set the roll contact point to zero and use a machine++u to determine the gap or indentation depth. Then, answer Ifi to the feed parameter Iv from the film thickness measuring device (4),
Adjusting the application 111 of the synthetic resin (3) to the metal j root according to fluctuations in the measured value of the film thickness by adjusting the contact L1 force of each roll by operating a hydraulic syringe. This is possible. Like this (12L Wa Tomita f1
) with synthetic resin (3) / ζ behind synthetic resin coating (
By continuously determining the thickness of 2) and adjusting the roll coater (11) accordingly, the amount of coating of the composite layer (iTl: 1) can be made constant. be.

In this way, the synthetic resin 1 resin (3) is applied to the metal plate (1), and then it is introduced into a baking furnace (l・η), and the synthetic resin g The film (2) is baked, and then the synthetic resin film (2) is coated with a metal adjustment roll (18).
) with a rainbow boss. Next, this is cooled with a cooler (19), and its shape is corrected with a leveler (2υ), and the thus obtained synthetic resin-covered metal film is wound into a coil (1). In addition, if necessary, the accuracy of the film thickness measurement of the synthetic resin coating (2) measured using a synthetic resin treated metal A% plate with a coil 8th coil, #j\, and a kaiding machine (4), synthetic resin υ] The following table shows the coloring hue of fat (3). This shows the 1' fluctuation tli eye circumference of the measured value for the synthetic resin coating (2) with a film thickness of 200 μm.

From the table above, it is confirmed that the first measurement shift is all within ±2.5% of the allowable range, and that film thickness can be measured with a high degree of M. This is highly accurate because it is difficult to absorb the influence of the gold bedside cord in the pigment of the main + metal and synthetic resin (3) applied to the metal plate (1), and it absorbs fluorescent X-rays. When measuring using the method, an error of at least 6.6% occurs within the same hue, whereas measurements can be performed with much smaller variations.

As described above, according to the present invention, the thickness of the synthetic resin coating can be continuously measured without breaking after applying the synthetic resin to the surface of the metal plate, and it is possible to directly measure the thickness of the synthetic resin coating from the measurement results. It has become possible to form a synthetic resin coating on a metal plate with a uniform coating by using a roll coater to coat the metal plate, which is significant in improving the quality and reducing the cost of synthetic resin-coated metal plates. .

[Brief explanation of the drawing]

v; Figure 1 is a schematic diagram showing the entire process of misfire 1rij, center 2
The figure is a schematic 11118 view of the O-L coater in the same as above. fl+ is a metal plate, (2) is a composite side M\1 coating, (3) is a synthetic resin, and (4) is an electrical machine with a film thickness li1. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] [+1 Between the process of applying synthetic resin to the surface of the gold sliding board and the process of drying and baking the applied synthetic resin film, immediately after the application process, cosyptosis scattering due to radiation cliff irradiation on the synthetic resin film was detected. 1. A method for producing a synthetic resin-coated metal plate, comprising: measuring the thickness of a synthetic resin coating using a method, and adjusting the coating thickness of the synthetic resin according to the measured thickness.