JPS58163646A - Manufacture of laminated metallic plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a laminated metal plate in which two metal plates are laminated with a synthetic resin layer interposed therebetween. The advantage is that it is possible to obtain a product with high adhesive strength.

In recent years, 2 has been used as a material for automobiles, vehicles, etc. to save fuel consumption and reduce weight.
Various types of laminated metal plates are used, in which two metal plates are laminated with a synthetic resin layer interposed therebetween. Conventionally, manufacturing this type of laminated metal plate involves first uniformly applying hot-melt or solvent-type synthetic resin adhesive to one metal plate at room temperature using a roll, heating it in a heating furnace, and then turning it into a molten state. By pressing one metal plate onto another metal plate, or by heating one metal plate, heat-sealing a synthetic resin film or applying molten resin to it, and cooling it, synthetic resin can be applied to one side. This method is carried out by manufacturing metal plates laminated together, then heating one of the metal plates in a heating furnace, and press-bonding the other metal plate to the surface of the molten resin.

However, in both of these methods, the adhesive or synthetic resin is heated in a heating furnace, so air bubbles may enter the adhesive or synthetic resin during heating, or the surface may be oxidized by the atmosphere of the heating furnace, resulting in insufficient adhesive strength. However, there was a problem in that when drawing was performed, depressions were formed in the air bubbles.

The present invention provides a method for manufacturing a laminated metal plate that does not cause such defects in the product.

The present invention solves the above problem by heating only the metal plates and melting the synthetic resin by the heat of the metal plates when laminating two metal plates with a synthetic resin layer in between. be.

The present invention will be specifically explained below using Examples.

FIGS. 1 and 2 show the process of continuously manufacturing laminated metal plates according to the present invention using metal strips. First, a pretreated metal strip coil 1 is manufactured as shown in FIG. 1. Set it on payoff reel 2. Then, the metal band 3 is sent out from the metal band coil 1 by a feed roll 4 and passed through a heating furnace 5 to heat the metal band 3. The metal strip 3 is heated by the heating furnace 5 so that the temperature of the metal strip 3 becomes higher than the melting point of the synthetic resin used at the press roll 6 provided on the exit side of the heating furnace 5.

On the other hand, in parallel with the setting of the metal band coil 1 on the payoff reel 2, a roll 7 of synthetic resin film is prepared on the exit side of the heating furnace 5, and from this, the synthetic resin film 8 is applied to the metal band 3 of the heating method. is supplied and crimped onto the metal strip 3 by a crimping roll 6. By this pressure bonding, the synthetic resin film 8 is melted by the heat of the metal band and is adhered to the metal band 3.

After crimping, the synthetic resin is cooled by a cooling device 9 to solidify, forming a single-sided synthetic resin laminated metal band 10, which is wound onto a tension reel 11. In this way, the synthetic resin film 8 is heat-sealed to all of the metal band coils 1, and a product coil 12 is manufactured with the synthetic resin adhered to one side.

Thereafter, this product coil 12 is placed on a reel 13 placed on the outlet side of the heating furnace 5 as shown in FIG. Set. Then, the metal band 3a is sent out from the metal band coil 1a in the same manner as described above and heated in the heating furnace 5. The heating temperature of the metal strip 3a by this heating furnace 5 is N, as in the case of the metal strip 3 described above. Next, a single-sided synthetic resin laminated metal strip 10 is supplied from a product coil 12 to the heated metal strip 3a, and the synthetic resin surface and the metal strip 3a are pressed together by a pressure roll 6. After crimping, the laminated metal strips 14 and the tension reel 1 are cooled by the cooling device 9.
Roll up to 1.

Although the above description has been made with reference to the case where a metal strip is used as the raw material, it can be manufactured in the same manner when a cut plate material is used. In the case of the above embodiment, a film was used as the synthetic resin, but the pressure roll 6 was removed and a device capable of supplying the synthetic resin in the form of a film, such as an extruder or curtain flow coating machine, was installed. The synthetic resin may be applied uniformly.

Table 1 shows the metal strip with a thickness of 0.2511111 and a width of 93Q.
A laminated steel plate according to the method of the present invention manufactured according to the process shown in FIGS. 1 and 2 using a cold-rolled steel strip of 250 μm and a polypropylene film with a thickness of 250 μm as the synthetic resin, and a laminated steel sheet as shown in FIG. According to the process, a product coil of a single-sided synthetic resin laminated metal strip is manufactured, and then the product coil is heated to melt the synthetic resin, and another metal strip at room temperature is crimped and pasted on the molten synthetic resin surface. This figure shows the adhesive strength of laminated steel plates made using the conventional method.

To measure the adhesive strength, take a sample with a width of 25 cm from the product, cut the widthwise end of the sample from the synthetic resin layer to the steel plate side, and
Measurements were made by placing the incised portion in the chuck of a tensile testing machine and peeling off the uncut portion.

In addition, as a result of observing the synthetic resin of the sample after peeling, no air bubbles were observed in the sample prepared by the method of the present invention, but
In the case of the conventional method, microbubbles were observed.

As described above, in the present invention, only the metal plates are heated in a heating furnace, and the synthetic resin is supplied outside the furnace to the seven heated metal plates to laminate the metal plates.
There are no air bubbles in the synthetic resin, and the surface is not oxidized, so a product with high adhesive strength can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS The attached drawings are manufacturing process diagrams of the present invention, with FIG. 1 showing the process up to obtaining a product coil, and FIG. 2 showing the manufacturing process. 1.1a...Gold S band coil, 2...Payoff reel, 3.3a...Metal band, 4...Feed Ronil, 5...
- Heating furnace, 6... Pressing roll, 7... Roll of synthetic resin film 1, 8... Synthetic resin film, 9... Cooling device, 10... Single-sided synthetic resin laminated metal strip, 11.・
・Te/Sho/Reel, 12...Produced product coil, 13・
... Reel, 14 ... Laminated metal strip Patent applicant Mitsuru Shindo, representative of Nissin Steel Co., Ltd.

Claims (1)

[Claims] In a method for manufacturing a laminated metal plate in which two metal plates are laminated with a synthetic resin layer interposed therebetween, a synthetic resin laminated metal plate is manufactured in advance by coating or pasting a synthetic resin on one side of a hindlimb metal plate in which one of the metal plates is heated. A method for producing a laminated metal plate, characterized in that the two metal plates are laminated by pressing the other heated metal plate and the synthetic resin layer surface of the synthetic resin laminated metal plate to melt the synthetic resin. .