JPS58129080A - Production of bonded clad metal plate - Google Patents

Abstract

PURPOSE:An adhesive film is previously applied to either of the parent material of a cut plate or the cladding material by the roll pressure, then the other plate is bonded therewith by means of hot press, thus producing a bonded clad metal plate of high surface accuracy and high quality in low costs. CONSTITUTION:For example, the parent material of a cut plate 3 is conveyed on the line, passed through the oven 5 to be heated to the pressing roller 8 set on the downstrem side of the oven 5, while a band of adhesive sheet 7 is sent from the pay-off reel 12 toward the pressing roller 8 so that it is piled on the parent material between the rollers to effect the application of the adhesive sheet 7 to the parent material 3. At this time, the adhesive roller is preferably under tension by means of tension rollers 13, because it is kept wrinkle-free. The material 3 coated with the adhesive sheet 7 is placed on the undertool 92 of the press and the cladding material 4 is placed thereon and they are pressed to effect bonding between the parent material 3 and the cladding material 4.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method of manufacturing high quality adhesive clad metal sheets.

Adhesive clad metal plates are generally made by bonding cladding materials such as stainless steel plates, copper plates, and various other metal plates to a base material made of carbon steel or the like using adhesive (resin) K. It combines the mutual advantages of clad metal and clad metal, and currently has a wide range of uses as a material for residential doors, theater ceilings, etc.

There are generally two methods for producing adhesive clad metal plates: a roll compression method and a hot press method.

As shown in Fig. 1G), the roll crimping method refers to the strip-shaped base material (3) and cladding material (4) that are sent out synchronously from two payoff reels (1) and (2) and placed in an oven (5).
(6), an adhesive thread (7) is fed between the heated base material and the clad material, and these three are bonded by applying a pressure roll (8).

As shown in the figure, the formation of unevenness αQ is unavoidable, and it is impossible to obtain a product with good flatness accuracy. On the other hand, in the hot press method, as shown in Fig. 1←), a cut plate-shaped base material (3)
and cladding material (4), and an adhesive sheet (
7), stack them on top of each other, and hot press (9) 1
(Pressing is carried out under heating with the setting at 9J. Although this method also prevents the continuous unevenness shown in Figure 2 0), the adhesive sheet (7) and the base material (3 ) Alternatively, outside air may be entrained with the cladding material (4), causing large localized bulges to easily form as shown in Fig. 2←), resulting in a high product defect rate. This air entrainment could be almost prevented by increasing the thickness of the adhesive sheet (7) to over 100 μm to increase its rigidity, but this would significantly increase the amount of adhesive used and reduce costs. The rise is inevitable.

The present invention has been made in view of the current situation, and includes:
The object of the present invention is to provide a method for manufacturing a high-quality adhesive clad metal plate with excellent planar accuracy at low cost.

That is, the present invention is characterized in that an adhesive film is applied in advance to either the cut plate-shaped base material or the clad material by roll pressure bonding, and then this and the other plate are bonded by hot pressing. In other words, the method of the present invention, which is a method for producing an adhesive clad metal plate, combines the features of both roll crimping and hot pressing, and the adhesive film is prepared in advance by applying the adhesive film to the matrix. The rigid body and the other plate are bonded together using a roll crimping method that does not cause air entrainment, which gives rigidity to the adhesive film, and then this rigid body and the other plate are bonded to By bonding using a hot press method that avoids the formation of porosity, adhesive clad metal plates with extremely high planar accuracy can be obtained.

A specific example of the method of the present invention will be explained in more detail with reference to the drawings.

■ As shown in Figure 3, for example, the base material (3
) are passed through the line and heated in sequence through the oven (5). This heating temperature is determined depending on the type of resin used as the adhesive described below, so that the adhesive sheet (7) can adhere to the base material (3), and the adhesive can ) is set at a temperature that does not stick to the roll during crimping.

The heated base material (3) is then sent to a pressure roll (8) installed downstream of the oven (5).

As this pressure roll (8), it is preferable to use a roll having a roll surface made of rubber or the like having a certain degree of elasticity, as in the case of the general roll pressure method.

■ On the other hand, a strip-shaped adhesive sheet (
7) is fed toward the pressure roll (8), and is fed between the rolls so as to overlap the heated base material (3), and the adhesive sheet (7) is pressed by the pressure roll (8). and base material (3) K. In this case, in order to prevent wrinkles from forming on the adhesive sheet (7), press the pressure roll (8).
) The sheet (7) that reaches the tension roll α [with]
It is recommended to keep it taut at all times.

■ After continuously press-bonding the adhesive sheet to the base material (3) in this way, cut out the adhesive sheet (7) for each base material (3) and attach the adhesive sheet (7) to the base material ( Set 3) on the hot press (9, 1 (9)) as shown in the same figure ←).

Place the adhesive sheet (7) on the upper side of the lower die (99) of the press, place the cladding material (4) thereon, and press to obtain a bond between the base material (3) and the cladding material (4). According to such a procedure, when hot pressing, the adhesive sheet (
7) is already attached to the rigid base material (3) in a wrinkle-free state, so air entrainment never occurs, and the occurrence of the bulge αυ shown in Figure 2 is completely eliminated. This is to be prevented. Moreover, even if unevenness αO as shown in FIG. 2 occurs due to the use of the pressure roll (8), this will be eliminated by the subsequent hot pressing, and therefore, according to the method of the present invention, the unevenness αO as shown in FIG. , it is expected that adhesive clad metal plates with extremely high planar accuracy can be manufactured.

Next, effects of implementing the present invention will be explained.

A mild steel plate made of the ingredients shown in Table 1 and electroplated with saliva (fabric weight - 40 f/r per side, 4 plate thickness 0.8
W, JIS Standard S ECC) (A) as the base material, using the clad material and adhesive of the material and thickness shown in Table 2,
Adhesive clad metal plates were manufactured using the conventional hot pressing method, roll crimping method, and the method of the present invention shown in FIG.

Each of the obtained metal plates was examined for the presence or absence of surface irregularities 'lO as shown in FIG. The results are in Table 2 and Table 3)
(wt section) As is clear from the table above, according to the method of the present invention, no matter which material is used as the base material, cladding material, or adhesive, the blistering caused by air entrainment that occurs when using the hot press method is avoided. It is possible to completely prevent any of the surface irregularities that occur when using the roll crimping method. Moreover, according to the method of the present invention, a clad metal plate with sufficiently good planar accuracy can be obtained by using a thin adhesive having a thickness of 100 μm or less. Therefore, the present invention can be said to be extremely effective as a measure to improve the quality of adhesive clad metal plates.

[Brief explanation of drawings]

FIG. 1 shows a conventional manufacturing method of an adhesive clad metal plate, where 0) shows the roll pressure bonding method and ←) shows the hot pressing method. FIG. 2 is a schematic diagram showing the surface condition of the adhesive clad metal plate obtained by each method shown in FIG. In the diagram 1.2: Payoff reel, 3: Base material, 4:
Cladding material; 5.6: Oven, 72 Adhesive sheet, 8
: Pressure roll, 9: Hot press, 10: Unevenness, 11:
Bulge, 12: Payoff reel, 13: Tension reel Applicant: Sumitomo Metal Industries, Ltd. No. 1! 11 (a) Fig. 1 (0) Fig. 2 (a) Fig. 3 1!11 (a)

Claims (1)

[Claims] (1) In manufacturing an adhesive clad metal plate in which a base material and a cladding material are bonded together with an adhesive, an adhesive film is pasted in advance on either the cut plate-shaped base material or the cladding material by roll pressure bonding. , and then bonding this and another plate by hot pressing.