JPS6251746B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a laminated metal plate with low fuel cost and excellent flatness.

In recent years, a laminated metal plate made by laminating two metal plates with a synthetic resin interposed therebetween has been used as a material for vibration isolation or damping. Conventionally, the continuous manufacturing method for such laminated metal plates involves coating or pasting synthetic resin on one or both of two strip-shaped metal plates, and then heating both metal plates with separate heating devices to melt the synthetic resin. This is done by pressing the two metal plates together.

However, the above method requires two heating devices, which makes the equipment expensive and fuel costs high.
The disadvantage was that work management such as temperature adjustment had to be done individually, making it complicated. Also 2
Since the center rings of two metal plates are aligned during crimping, the crimping and center rings must be adjusted at the same time, which is technically difficult.

Furthermore, in the above method, the shape correction after crimping was done using a leveler, but since the leveler applies bending using a work roll with a small diameter, if the synthetic resin layer is thick, the curvature of the inside and outside will be significantly different. For this reason, when sudden bending is applied to the narrow entrance side of the intermesh, the deformation of the synthetic resin layer does not follow, and the outer metal plate sometimes peels off. Furthermore, when thin gauge metal plates are used, they are compressed with thermal distortion caused by heating, resulting in gentle wrinkles on the surface after compression, but these wrinkles are difficult to remove with a leveler. .

The present invention provides a method for manufacturing a laminated metal plate that eliminates the above-mentioned drawbacks.

The present invention solves the above problem by stacking two metal plates, heating them in the stacked state using the same heating device, aligning the center rings, and modifying the shape using a skin pass.

One method of the present invention will be specifically explained below with reference to FIG.

In Figure 1, 1 and 1a are payoff reels,
Metal plate coils 2, 2a are set on these payoff reels 1, 1a. Then, the metal plates 3 and 3a are sent out from these metal plate coils 2 and 2a and passed through pretreatment devices 4 and 4a to undergo pretreatment. This pretreatment may be a general pretreatment for painting such as phosphate treatment or chromate treatment. After the pretreatment, the metal plates 3, 3a are inserted into the input side stacking rolls 6, 6a via the deflector rolls 5, 5a while adjusting the center ring, and the two metal plates 3, 3a are stacked. Thereafter, the metal plates 3, 3a are heated in a stacked state by a heating device 7 to a temperature higher than the melting point of the synthetic resin used, and after passing through the exit stacking rolls 8, 8a, both metal plates 3, 3a are separated by separation rolls 9, 9a. separate them.

For example, a coiled synthetic resin film or a resin film extrusion device is prepared between the metal plates 3 and 3a separated from each other, and the synthetic resin film 10 is supplied from there between the metal plates 3 and 3a.
After supplying both metal plates 3, 3a, press rolls 11, 1
1a to form a laminated metal plate 12, the synthetic resin is heated to a temperature higher than the melting temperature of the synthetic resin in a reheating device 13 to mature the synthetic resin, and the pressure roll 1
4 and 14a, the bonding strength is increased by performing pressure bonding again, and then the resin is cooled to below the melting temperature of the synthetic resin in the cooling device 15.

After cooling, the skin pass mill 16 removes wrinkles on the surface caused by heating and reheating and corrects the distorted shape. After the shape correction, the product is wound on a tension reel 17 if it is to be made into a coil, and cut with a shear 18 if it is to be made into a cut plate.

Next, the present invention will be explained with reference to examples.

A laminated steel plate was manufactured as shown in Figure 1 using a cold-rolled steel coil with a plate thickness of 0.25 mm and a plate width of 930 mm.

Degreasing, pickling, and phosphate treatment are sequentially performed in the pretreatment devices 4 and 4a, and the heating device 7 heats the two stacked steel plates so that the steel plate temperature reaches 210°C at the pressure rolls 11 and 11a. A polypropylene film (thickness 0.3 mm, melting point 160°C) was used as the synthetic resin film 10. Heating was performed using the reheating device 13 so that the temperature of the laminated steel sheets reached 250° C., and the laminated steel sheets were crimped again using the crimping rolls 14 and 14a. The laminated steel plate that has been crimped again is placed in cooling device 1.
5 and water-cooled.

After cooling, large, gently undulating wrinkles were observed on the surface of the laminated steel sheet, as well as weak medium elongation and side waves, but these were corrected and became flat when a skin pass was applied at a rolling reduction rate of 0.5%.

A 25 mm wide sample was taken from the product, and the cut end was cut into the steel plate side centering on the synthetic resin, and the cut part was placed over the chuck of a tensile tester to measure the peel strength (JISK6829). As a result, the peel strength was 14 kgf/25 mm. Furthermore, when the synthetic resin of this tested sample was observed, the synthetic resin adhered to both steel plates, and no peeling was observed between the steel plate and the synthetic resin. The product was also cut into large pieces and the cut surfaces were observed, but there was no part where the steel plate and synthetic resin had separated.

As explained above, since the present invention stacks metal plates and heats them with the same heating device, only one heating device is required, so equipment costs are low, fuel consumption is low, and work management is easy. It is.

Furthermore, since the centering of the two metal plates is first adjusted and then they are crimped together, there is no need to manage multiple pieces at the same time, and management is easy. In addition, since surface wrinkles are removed and the shape is shaped after cooling by a skin pass, bending is not applied and the reduction is stronger than with a leveler, resulting in a smooth and flat product.

[Brief explanation of the drawing]

FIG. 1 is a manufacturing process diagram of a laminated metal plate according to the present invention. 1, 1a... Payoff reel, 2, 2a... Metal plate coil, 3, 3a... Metal plate, 4, 4a...
Pretreatment device, 5, 5a...deflector roll,
6, 6a... Input stacking roll, 7... Heating device, 8, 8a... Output stacking roll, 9, 9a
... Separation roll, 10 ... Synthetic resin film, 1
1, 11a...Crimping roll, 12...Laminated metal plate, 13...Reheating device, 14, 14a...Repressing roll, 15...Cooling device, 16...Skin pass mill, 17...Tension reel, 18... Siya.

Claims (1)

[Claims] 1. A method for manufacturing a laminated metal plate in which two metal plates are laminated with a synthetic resin interposed therebetween, the manufacturing steps of which include (1) superimposing the two metal plates and heating them with the same heating device; (2) A process of separating two heated metal plates, supplying synthetic resin between the separated metal plates, and crimping the two metal plates; (3) A laminated layer obtained by the crimping. (4) cooling the laminated metal plates after re-compression to below the melting temperature of the synthetic resin; (5) lamination after cooling. A method for manufacturing a laminated metal plate, comprising the step of skin-passing the metal plate.