JPH07137135A - Manufacture of resin film laminate surface treated metal sheet - Google Patents

Abstract

PURPOSE:To attempt improvement of quality such as corrosion resistance or the like by controlling melt to a laminate pressure fixed front surface part by a method wherein pressure fixing with a roll is carried out while a surface of the pressure fixing roll is being cooled with a contact cooling system consisting of a heat-radiating belt and a belt cooler. CONSTITUTION:Heat-radiating belts 5a, 5b are respectively endlessly arranged between cooling rolls 7a, 7b and pressure contact rolls 4a, 4b, 4c, 4d, move at a uniform speed according to rotary speed of the roll while being in contact with pressure fixing rolls 3a, 3b, and the pressure fixing rolls 3a, 3b are cooled by extracting heat. In that case, temperature of the cooling rolls 7a, 7b is adjusted according to sheet-passing conditions, and/or by transferring the pressure contact rolls 4a, 4b, 5c, 4d and the cooling rolls 7a, 7b in the arrow direction, contact surfaces with the pressure fixing rolls 3a, 3b are regulated to control a heat amount to be extracted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a resin film laminated surface-treated metal plate.

[0002]

2. Description of the Related Art Laminating a resin film on a surface-treated steel sheet such as a chromium-plated or tin-plated steel sheet to improve corrosion resistance is disclosed in Japanese Patent Laid-Open No. 3-239538. In such a method, after pressure-bonding and laminating the film to the surface-treated steel sheet, the film is heated by the sensible heat of the steel sheet and the resin during the movement up to the cooling such as water cooling, and the surface of the film is heated. However, there are drawbacks such as deterioration, deterioration of corrosion resistance, etc., and marked deterioration of quality.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art, and suppresses melting of the resin film to the pressure-bonded surface of the resin film and improves the quality such as corrosion resistance. It is an object to provide a method for manufacturing a surface-treated metal plate.

[0004]

In order to achieve the above object, the present invention relates to a method of roll-pressing a resin film onto a surface-treated metal plate to laminate the resin film. A method for producing a resin film-laminated surface-treated metal sheet, comprising: roll-pressing while cooling with a contact cooling system comprising a cooling device; and (2) a method for roll-pressing and laminating a resin film on a surface-treated metal sheet. , The surface of the pressure bonding roll is cooled by a contact cooling system including a heat removal belt and a belt cooling device, and the roll pressure bonding is performed while controlling the contact area between the heat removal belt and the pressure bonding roll and / or the cooling capacity of the belt cooling device. A method for producing a resin film-laminated surface-treated metal sheet, comprising: (3) a contact area between a heat removal belt and a pressure roll and / or a cooling ability of a belt cooling device. Which is a said (2) A method of manufacturing a resin film laminated surface treated metal plate, wherein the control based on the required material of the resin film-laminated surface treated metal sheet.

Generally, when the resin film is pressure-bonded to the steel plate surface by roll pressure bonding, the steel plate (band) and the film are heated (preheated), laminated at the roll position, and pressure-bonded by the roll. Then, the film to be laminated is one in which the one having the desired performance is laminated and pressure-bonded on the surface of the steel plate, and when pressure-bonding, the film is melted and pressure-bonded to surely adhere to the surface of the steel plate.

In pressure bonding, the film is preheated, the steel plate is also preheated, and the roll is internally cooled so that the temperature does not exceed a predetermined temperature, and the film is in a molten state at the steel plate contact portion (face). By laminating (press-bonding) the film surface portion in a non-melted state, the film (resin) has the intended performance (corrosion resistance, processability, etc.) and secures adhesion.

In this way, when the film is laminated and pressure-bonded on the surface of the steel sheet, pulled out from the roll, and cooled (generally immersed in cooling water), the sensible heat of the film and the steel sheet causes a melted state up to the surface portion of the film. However, the entire film is deteriorated (the chemical structure or the crystal structure is changed), and the desired performance is not provided, so that the corrosion resistance and the like are deteriorated.

In the present invention, however, the heat removal belt is arranged endlessly between the belt cooling device and the belt pressure contact roll, and the belt is moved while being in contact with the non-pressure contact part of the film pressure contact roll. That is, when rotating the resin film pressure-bonding roll, by rotating while contacting the heat removal belt to the roll non-pressure-bonding part, the resin film pressure-bonding roll surface is cooled, in the pressure-bonding part by the resin film pressure-bonding roll (face), The surface-treated steel sheet on which a resin film is laminated is cooled to suppress melting of the steel sheet and the film to the surface of the film due to sensible heat, and then cooling such as cooling water is performed. Since the heat removal belt does not come into direct contact with the resin film, the appearance defect such as distortion does not occur in the film.

Further, roll contact bonding is performed while controlling the contact area between the heat removal belt and the contact roller and / or the cooling capacity of the belt cooling device. That is, the conditions (passing speed, passing speed,
It is possible to manufacture a resin film-laminated surface-treated metal plate of stable quality by automatically controlling the cooling of the steel plate and the film at the pressure-bonding portion according to the lamination temperature, etc.). Furthermore, it becomes possible to deal with the production of resin film laminated surface-treated metal plates of various materials, plate widths, plate thicknesses, and layer thicknesses without significant equipment changes.

For example, surface-treated steel sheet thickness 0.15 to 0.3
mm, steel plate preheating temperature 150 to 300 ° C., resin (thermoplastic resin) film thickness 10 to 30 μm, resin preheating temperature 70 to
When pressure bonding is performed at 180 ° C. and a plate passing speed of 60 to 250 m / min, the progress of melting up to the surface portion of the resin film can be reliably suppressed by bringing the heat removal belt into contact with the pressure bonding roll for about 200 mm.

As the surface-treated steel sheet as described above, for example, a tin-plated steel sheet, a chrome-plated steel sheet, a steel sheet obtained by precipitating a layer of metallic chromium and chromium oxide on the surface layer of a tin-plated steel sheet, which is used as a material for a can. Is preferred.

The heat removal belt is preferably made of a high heat conductive material, and for example, a metal material such as carbon steel, copper, aluminum, stainless steel, a resin (thermoplastic resin, etc.) or the like can be used, and a thickness of 0.05 to. 0.3mm is suitable.

The belt pressure contact roll can be moved in the circumferential direction of the pressure bonding roll while maintaining the pressure contact of the heat removal belt with the pressure bonding roll, thereby adjusting the contact area between the heat removal belt and the pressure bonding roll. Is possible.

The belt cooling device may be, for example, a cooling roll or a cooling medium spraying device (the cooling medium may be gas, steam, etc.). Cooling roll has a diameter of 100
It is suitable to use a hollow metal roll having a diameter of 300 mm and a structure in which cooling water, the temperature and flow rate of which are adjusted by a cooling water supply device, is caused to flow inside the cooling roll. Further, the distance between the cooling roll and the pressure bonding roll can be changed according to the amount of movement of the belt pressure contact roll so that the tension of the heat removal belt is kept constant. As a method for cooling the pressure-bonding roll surface, a cooling method in which the cooling roll is brought into direct contact with the pressure-bonding roll is also conceivable, but since the heat removal area is larger in the above method using a heat removal belt, the cooling capacity is greatly improved, It can also be used for high-speed passing.

Next, an example of the present invention will be described with reference to the drawings.
In FIG. 1, between the cooling rolls 7a, 7b and the belt pressure contact rolls 4a, 4b, 4c, 4d, there is an endless heat removal belt 5
a and 5b are arranged, and while contacting the pressure bonding rolls 3a and 3b, the pressure bonding rolls 3a and 3b are moved at a constant speed according to the rotation speed of the rolls, and the pressure bonding rolls 3a and 3b are heat-cooled. At that time, the temperature of the cooling rolls 7a and 7b is adjusted according to the strip passing conditions,
And / or the pressure contact rolls 4a, 4b, 4c, 4d and the cooling rolls 7a, 7b are moved in the arrow direction (→) to adjust the contact area with the pressure bonding rolls 3a, 3b and control the heat removal amount. Crimping roll 3 thus cooled
The preheated surface-treated steel sheet 1 and the resin films 2a and 2b are introduced to a and 3b, laminated on the front and back surfaces of the steel sheet 1, and simultaneously pressed. After cooling in this way, cooling water 8 is dipped and passed through to cool.

Although not shown in FIG. 1, the pressure rolls 4a, 4b, 4 can be stored in the desired material data storage device.
By controlling the amount of movement of c, 4d and the cooling rolls 7a, 7b, it is possible to manufacture a resin film-laminated surface-treated metal plate according to a desired material. Furthermore, FIG.
Although not shown in the figure, a surface thermometer (a non-contact type thermometer such as a heat radiation type) is provided on the inlet side and the outlet side of the resin film to the pressure bonding rolls 3a and 3b, and the resin film temperature on the inlet side and the outlet side is provided. By controlling the amount of heat removal based on the above, it is possible to manufacture a resin film-laminated surface-treated metal plate of higher quality.

[0017]

EXAMPLES Next, examples of the present invention will be described together with comparative examples. (Example 1) Operating conditions (1) Surface-treated steel plate: chrome plating, thickness 0.26 mm (2) Resin film: polyethylene terephthalate, thickness 25 μm (3) Preheating temperature: surface-treated steel plate 230 ° C., film 13
0 ℃ (4) Crimping roll diameter: 300mm (5) Line speed: 60m / min

Under such conditions, when the resin film-laminated surface-treated metal plate was manufactured as shown in the figure, cooling was carried out under the following conditions. (1) Heat removal belt: low carbon steel, thickness 0.1 mm (2) Contact length between pressure bonding roll and heat removal belt: 100 mm (3) Cooling roll diameter, cooling water amount, cooling water temperature: 100 mm,
40 l / min, 90 ° C Heat the surface-treated steel plate in this way to remove surface temperature 170
It was cooled to 0 ° C., and after 1.5 seconds, it was permeated and passed into cooling water (room temperature) to obtain a product. The rate at which the resin film was melted to the surface and the product was downgraded was 5%.

(Example 2) Operating conditions (1) Surface-treated steel plate: chromium plating, plate thickness 0.2 mm (2) Resin film: polyethylene terephthalate, thickness 20 μm (3) Preheating temperature: surface-treated steel plate 235 ° C., film 16
0 ℃ (4) Crimping roll diameter: 500mm (5) Line speed: 150m / min

Under the above conditions, when producing the resin film-laminated surface-treated metal plate as shown in the figure, cooling was carried out under the following conditions. (1) Heat removal belt: copper, thickness 0.15 mm (2) Contact length between pressure bonding roll and heat removal belt: 200 mm (3) Cooling roll diameter, cooling water amount, cooling water temperature: 100 mm,
40 l / min, 90 ° C Heat the surface-treated steel plate in this manner to remove the surface temperature of 200
It was cooled to 0 ° C., and after 0.6 seconds, it was permeated and passed into cooling water (room temperature) to obtain a product. The rate at which the resin film was melted to the surface and the product was downgraded was 6%.

(Example 3) Operating conditions (1) Surface-treated steel plate: chrome plating, plate thickness 0.15 mm (2) Resin film: polyethylene terephthalate, thickness 15 μm (3) Preheating temperature: surface-treated steel plate 220 ° C., film 17
0 ℃ (4) Crimping roll diameter: 600mm (5) Line speed: 250m / min

Under such conditions, when the resin film-laminated surface-treated metal plate was manufactured as shown in the figure, cooling was carried out under the following conditions. (1) Heat removal belt: Stainless steel (SUS304), thickness 0.2 mm (2) Contact length between pressure bonding roll and heat removal belt: 300 mm (3) Cooling roll diameter, cooling water amount, cooling water temperature: 100 mm,
50 l / min, 95 ° C Heat the surface-treated steel plate in this way to remove surface temperature 190
It was cooled to 0 ° C., and after 0.4 seconds, it was permeated and passed into cooling water (room temperature) to obtain a product. The rate at which the resin film was melted to the surface and the product was downgraded was 5.5%.

(Comparative Example) Under the conditions of Example 1, a total surface-treated metal sheet having a resin film was manufactured without contacting the heat removal belt with a pressure roll. When 1.5 seconds had passed after the pressure bonding, cooling water (room temperature) was dipped in and passed through to cool. The product downgrade rate in the same evaluation as in the example was 16%.

[0024]

EFFECTS OF THE INVENTION According to the present invention, resin film laminated surface treatment of various materials, plate thickness, plate width and layer thickness capable of surely preventing performance deterioration of the resin film and reducing the product downgrade rate. It is possible to obtain an excellent effect that a metal plate can be manufactured without drastic equipment change.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of an apparatus for carrying out the method of the present invention.

[Explanation of symbols]

 1 Surface-treated steel plate 2a, 2b Resin film 3a, 3b Pressure bonding roll 4a, 4b Belt pressure contact roll 5a, 5b Heat removal belt 6 Resin film laminated surface-treated metal plate 7a, 7b Cooling roll 8 Cooling water

Claims (3)

[Claims] 1. A method of laminating a resin film on a surface-treated metal plate by roll-bonding, wherein the surface of the press-bonding roll is cooled by a contact cooling system including a heat removal belt and a belt cooling device, and roll-bonding is performed. And a method for producing a resin film-laminated surface-treated metal plate. 2. A method for laminating a resin film on a surface-treated metal plate by roll-bonding, wherein the surface of the pressure-bonding roll is cooled by a contact cooling system consisting of a heat-discharging belt and a belt cooling device, and the heat-discharging belt and the pressure-bonding roll. A method for producing a resin film-laminated surface-treated metal plate, which comprises roll-pressing while controlling either or both of a contact area with the belt cooling device and a cooling capacity of a belt cooling device. 3. A contact area between a heat removal belt and a pressure roll or a cooling capacity of a belt cooling device, or both are controlled based on a required material of a resin film laminated surface-treated metal plate. 3. The method for producing a resin film-laminated surface-treated metal plate as described in 2.