JPH0430046Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Field of Industrial Application) The present invention relates to an adhesive roll for laminated steel plates used for manufacturing laminated steel plates in which a resin film is interposed between two metal plates, and more specifically, the adhesive roll surface is coated with an alloy material by thermal spraying. Furthermore, the present invention relates to an adhesive roll for laminated steel plates having an inorganic lubricant layer formed on the roll surface. (Prior art) In recent years, laminated steel sheets, which are made by laminating two metal plates with various synthetic resins interposed between them, have attracted attention due to their excellent vibration damping properties and lightweight effects, and are being used as materials for automobiles and civil engineering and construction materials. It is widely used as a material for other home appliances. In order to manufacture this type of laminated steel plate, the hot press method generally involves placing a resin between the metal plates and bonding them using a heated press plate, or the hot pressing method, in which two metal plates and a synthetic resin plate are placed between one or more pairs of adhesive rolls. In this case, an adhesive resin film is continuously supplied between metal plates, and these are bonded together by heating using an adhesive roll method. Recently, the adhesive roll method has become mainstream because of its excellent productivity and the possibility of continuous production by coiling. The adhesive roll mentioned above is used by heating the adhesive roll to around the melting temperature of the resin used, depending on the resin used, in order to melt the adhesive resin film that comes into contact with the metal plate during bonding and bring it into contact with the metal plate. is common. As for conventional rolls that bond while heating,
For example, as disclosed in Japanese Patent Publication No. Sho 63-19345, there is a pressure welding device for thermo-pressure welding synthetic resins, a heating device that heats a metal plate installed after the pressure welding device, and a heating device installed after the heating device. Some are equipped with thermocompression bonding equipment. Furthermore, in Japanese Patent Application Laid-Open No. 60-71250, a metal strip supplied with a synthetic resin is bonded by a plurality of adhesive rolls each consisting of a pair of rolls, while heating the metal strip with these rolls. A method of forming a laminated metal strip is disclosed. Furthermore, Japanese Patent Application Laid-Open No. 60-230847 discloses a preheating furnace in which a pretreatment device, a skin passage passage in the furnace is divided, a laminating roll and a pressure roll are installed on the exit side, a cooling roll, and a final cooling roll are successively connected. A manufacturing facility is disclosed in which a resin film supply device is oriented between lamination roll skins in a preheating furnace. Conventionally, adhesive rolls used in production lines for such laminated steel sheets have rolls with a Cr alloy plating layer applied to the bottom surface of the roll body for heat resistance and abrasion resistance. (Problem to be solved by the invention) However, the method of simultaneously heating two metal plates with a heating device before thermocompression bonding does not provide a uniform temperature, resulting in temperature variations, and the metal plates and synthetic resin The adhesion and adhesion with the layer are not satisfactory, and therefore, due to the uneven adhesion, the material loses its function as an automobile material, a civil engineering and construction material, or a material for home appliances. In addition, the method of heating the metal strip by arranging multiple adhesive rolls requires multiple rolls, so
This method has the drawbacks of high equipment and management costs and lack of practicality. Furthermore, Cr is added to the base surface of the conventional roll body.
Adhesive rolls coated with an alloy plating layer are effective in terms of heat resistance and abrasion resistance, but the adhesive rolls are heated to raise the temperature of the metal plate to approximately 100 to 120°C and the sheet is passed between the adhesive rolls. Then, the metal plate thermally expands while in contact with the roll, and iron oxide on the metal plate or iron powder from the outside gradually accumulates on the surface of the roll, resulting in a so-called build-up phenomenon. If this build-up occurs, the surface of the metal plate will be scratched while being passed through the adhesive roll, making it impossible to use it as a product. For this reason, the current practice is to frequently clean the roll surface while the build-up period is still small, or sometimes immediately suspend operations and replace the adhesive rolls. This is a cause of increased maintenance costs, and it cannot be said that the prevention of build-up is fully satisfied. The present invention is applied to adhesive rolls used in the production of laminated steel plates, and as a result of various studies on alloy materials with good build-up resistance, it solves the above-mentioned problems, greatly reduces the occurrence of build-up, and The present invention provides an adhesive roll for laminated steel plates that can withstand continuous operation for a long period of time without causing quality defects to the plates. (Means for Solving the Problems) In order to achieve the above object, the adhesive roll for laminated steel plates according to the present invention has WC-12% Co
The present invention is characterized in that a thermally sprayed coating layer is formed by thermally spraying a cemented carbide material to a thickness of 100 to 150 μm, and an inorganic lubricant layer is further formed on the surface of the thermally sprayed coating layer. (Function) In this invention, as the alloy material constituting the thermal spray coating layer on the surface of the adhesive roll, WC-Co cemented carbide, which has a low affinity with metal plates and has excellent wear resistance and heat resistance, is selected. , contains 12% Co, and the coating layer is 100%
Formed by thermal spraying to a thickness of ~150μm. In this invention, Co is the most suitable binder for WC and ensures high strength under high temperatures, but it is necessary to ensure the melting temperature of the resin used.
12% is required. If the Co content is less than 12%, the strength of the thermally sprayed heat-resistant layer cannot be ensured, while if the Co content exceeds 12%, hot brittleness increases, which is not preferable. The thickness of the sprayed coating layer should be in the range of 70 to 150μm; if the thickness is less than 70μm, there will be problems with wear resistance, and if it exceeds 150μm, the sprayed layer will easily peel off and the cost will increase. . In this invention, in order to reduce the coefficient of friction between the metal plate and the roll surface and prevent build-up, the roll surface on the thermal spray coating layer is
A Mo-based quick-drying lubricant is applied, but other lubricants are also effective as long as they have wear resistance and are effective in reducing roll wear. (Example) Hereinafter, an example of the present invention will be described with reference to the drawings. Figure 1 is a diagram showing a production line for laminated steel plates using the adhesive roll of the present invention.
are an upper metal plate and a lower metal plate wound into a coil, which are rewound by payoff reels 2 and 2' equipped with a tension control function and supplied to the line. The upper metal plate 1 and the lower metal plate 1' are preheated by preheating rolls 3 and 3' containing hot water, and then guided to temporary bonding rolls 4 and 4' coated with WC-Co thermal spray coating of the present invention. It will be destroyed. On the other hand, the adhesive resin films 6, 6' supplied from the adhesive resin film coils 5, 5' are temporarily adhered to one side of the upper metal plate 1 and the lower metal plate 1' by temporary adhesive rolls 4, 4'. . In order to temporarily bond the upper metal plate 1 and the lower metal plate 1' to the adhesive resin films 6, 6', it is necessary to heat them to 150°C prior to temporary bonding.
A heating coil is placed inside the temporary adhesive rolls 4, 4' to heat them. After the adhesive resin films 6, 6' have been temporarily bonded, the upper metal plate 1 and the lower metal plate 1' are then coated with a pair of upper and lower adhesive rolls 7 coated with WC-Co based thermal spray coating according to the present invention. , 7' are pulled out in one direction while being heated and pressed. In this case as well, since it is necessary to heat the film to 250° C. prior to the main bonding, heating coils are installed in the rolls 7 and 7' of this device. The laminated steel plate 8 with the adhesive resin films 6, 6' interposed between the two metal plates 1, 1' is led to the next line's heat retention and cooling roll band 9, where it is heated to a temperature below the melting temperature of the adhesive resin. Cooling. The laminated steel plate 8 after cooling is
It is wound onto a tension reel 10 to form a laminated steel plate coil 11. Figure 2 is a cross-sectional structural diagram of the adhesive roll of the present invention.
As shown in the figure, the surface of the roll outer cylinder 13 has WC-
The sprayed layer 14 of %12Co-based superalloy material has a thickness of 70 to 150 μm.
Furthermore, a Mo-based lubricant 15 is coated on the thermal spray layer 14. Further, a heating coil 16 is provided within the roll body 12. As mentioned above, the adhesive roll for laminated steel plates of the present invention is made of an alloy material that has excellent build-up resistance and is also strong in wear resistance and peeling resistance. As a result of experiments using conventional adhesive rolls with a Cr alloy plating layer, iron oxides and iron powder adhered to the roll surface within one day, causing scratches on the metal plate. It was confirmed that with an adhesive roll coated with a WC-Co alloy material with a thickness of 70 to 150 μm, the period until flaws appeared on the metal plate could be extended by one week. In this invention, we further reduce the coefficient of friction between the metal plate and the roll surface, and use an inorganic (Mo-based quick-drying) lubricant to prevent iron oxide from adhering to the roll surface and to improve heat resistance. As a result of application, it was confirmed that the period until scratches appeared on the metal plate was extended by 15 days.

[Table] (Effects of the invention) As mentioned above, the adhesive roll for laminated steel plates of the present invention has excellent build-up resistance, wear resistance, and peeling resistance, and is suitable for laminated steel plates. It enables long-term continuous operation in manufacturing and extends the period during which defects occur on metal plates.
The quality and productivity are significantly improved, and it is extremely effective as an adhesive roll for laminated steel plates.

[Brief explanation of the drawing]

Figure 1 shows the production line for laminated steel plates, Figure 2
The figure is a cross-sectional structural diagram of the adhesive roll of the present invention. 1... Upper metal plate, 1'... Lower metal plate, 2, 2'...
...Payoff reel, 3,3'...Preheat roll, 4,
4'...Temporary adhesive roll, 5,5'...Adhesive resin film coil, 6,6'...Adhesive resin film,
7, 7'... Actual adhesive roll, 8... Laminated steel plate, 9
...Cooling roll band, 10...Tension reel,
11... Laminated steel plate coil, 12... Roll body,
13... Roll outer cylinder, 14... Thermal spray layer, 15...
Lubricant, 16... Heating coil.

Claims (1)

[Scope of utility model registration request] This is an adhesive roll for laminated steel plates used for manufacturing laminated steel plates in which a resin film is interposed between two metal plates, and the roll surface is coated with a WC-12% Co-based cemented carbide material to a thickness of 100 to 150 μm. 1. An adhesive roll for laminated steel plates, comprising a thermally sprayed coating layer, and further comprising an inorganic lubricant layer formed on the surface of the thermally sprayed coating layer.