JPH02196650A - Production of weldable laminated metal plate - Google Patents

Abstract

PURPOSE:To stably produce a weldable laminated metal plate even when a conductive metal powder low in hardness such as a copper or aluminum powder is used by a method wherein a resin is applied to one of or both of the opposed surfaces of two metal plates and these metal plates are brought to a close contact state through coating surfaces to be bonded under pressure by press rolls and subsequently wound around a plurality of rolls while winding pressure is adjusted to be bonded under pressure. CONSTITUTION:A metal powder-containing resin is applied to one metal plate (strip) 11a by a coating apparatus 4 such as a spray apparatus and the coated metal plate is dried by a drying apparatus 5 to be sent to a press bonding apparatus 20. The other metal plate (strip) 11 is preheated by a metal plate preheating apparatus 3 to be sent to the press bonding apparatus 20. Both metal plates (strips) 11, 11a are bonded under pressure by the press bonding apparatus 20 while the pressure and temp. toward the centers of press rolls 21, 22 and a winding roll 23 are adjusted so as to be held for a definite time. This pressure is determined by the tension due to a tension apparatus 30 and the winding angle to the winding roll. By this method, a laminated metal plate excellent in weldability and adhesiveness is easily obtained and the quality and yield thereof can also be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to a method for manufacturing a weldable laminated metal plate.

[Prior Art J] A weldable laminate metal plate in which a resin layer containing conductive metal powder is interposed between two metal plates is known, for example, in JP-A-60-912.

A conventional method for manufacturing such a weldable laminated metal plate is shown in FIG. Coiled metals Mj, ll, lla are prepared by a pair of uncoilers l, la, and after pretreatment in a degreasing process and a cleaning process, conductive filler and liquid resin are applied to the opposing surfaces of one or both metal plates. The mixture is uniformly diffused and coated using a coating device 4 such as a spray nozzle, and the other strip-shaped metal plate 11a is stacked on top of one metal plate 11, and the other band-shaped metal plate 11a is placed on top of the other metal plate 11, and the mixture is crimped with a pressure bonding roll 6 to obtain a composite metal plate 1.
2 is wound up by the winding device 7.

In the case of the conventional method, as shown above, since the crimping roll 6 is used for crimping, the crimping time for crimping the two metal sheets 1i11.11a sandwiching the conductive filler is extremely limited. However, it has been difficult to produce reweldable composite metal plates in a good and stable manner.

This can be said to be extremely difficult, especially when metal powder with low hardness is used as the conductive filler.

Therefore, a press roll method using an endless belt has been proposed in JP-A-53-141153, but this method also has the problem that sufficient pressing force cannot be obtained and it cannot be put to practical use.

[Problems to be Solved by the Invention] The present invention proposes a process in which temperature and pressure are continuously applied over a period of several seconds to several tens of seconds, rather than the extremely short time crimping using only a crimping roll used in the prior art. The purpose is to press-bond two metal plates while using the device.

By doing so, a weldable laminate metal plate can be stably and satisfactorily manufactured even when using conductive metal powder with low hardness such as copper or aluminum.

[Means for Solving the Problems 1] The present invention provides a method for manufacturing a composite metal plate in which a resin layer containing conductive metal powder is provided between two metal plates. The metal plate is coated with a resin, the coated surfaces of the metal plate are brought into close contact with each other, the metal plate is crimped with a pressure roll, and then the metal plate is further wrapped around a plurality of rolls and crimped while adjusting the winding pressure.

[Operation J] Figures 1 and 2 show the apparatus used to carry out the method of the present invention. Note that the only difference between FIG. 1 and FIG. 4 is the crimping part, and the description of the other parts is the same as the description of FIG. 4.

In FIG. 1, a metal plate 11a coated with a mixture of a filler made of conductive metal powder and a liquid resin and the other band-shaped metal plate 11 are overlapped and wound around a roll 21. After being crimped between the pressure roll 22 and the pressure roll 22, it passes over the roll 23 while maintaining pressure in the direction of the center of the roll, passes through a tension device 30, and is wound up by the winding device 7. A tension device 30 or rolls 21 and auxiliary rolls 24 and 25 are used to press the two sheets from the outside of the rolls 22 to maintain the pressing force toward the center of the rolls 21 and 22 of the two stacked metal sheets 12. It is also realized by Note that the rolls 21 and 22 are rolls whose surface temperature can be adjusted between 150 and 200°C by induction heating, etc. , is configured to be able to apply pressure in the vertical direction.

[Example] Next, examples of the present invention will be given.

In FIG. 1 showing an embodiment of the present invention, one metal plate (band) Ila is coated with a resin containing metal powder using a coating device 4 such as a sprayer, dried by a drying device 5, and a pressure bonding device 20. leading to. After the other metal plate (band) 11 is preheated by the metal plate preheating device 3, both metal plates (band) 11.11a are transferred to the pressure bonding device 20 by the pressure roll 2.
1.221 turns are crimped while adjusting the pressure and temperature toward the center of the roll 23 to be maintained for a certain period of time. This pressure is determined by the tension applied by the tension device 30 and the wrap angle around the roll.

The required winding angle to the roll changes depending on the speed of sheet threading, but in any case, it is best to press while holding the pressure and temperature for 0.5 to 60 seconds, preferably 5 to 30 seconds. Adhesive strength and weldability were obtained.

Therefore, when the sheet threading speed is high, the pressure roll 2 is
In addition to 1.22, winding is done by roll 23.2 as shown in Figure 2.
It is also effective to increase the number to 6.27.

Note that the pressure bonding device 20 includes a pressure roll 21 as shown in FIG.
．． 22 and winding were also effective by arranging rolls 23, 26, . . . as shown in the figure.

A weldable laminated metal plate could be manufactured with sufficient reliability using the method described above.

[Effects of the Invention J According to the present invention, it is possible to easily obtain a laminated metal plate with excellent weldability and adhesiveness, and it has excellent effects such as improving quality and improving longevity. can get.

[Brief explanation of the drawing]

1, 2, and 3 are detailed illustrations of the present invention, and FIG. 4 is an illustration of a conventional device. 1...Uncoiler 3...Metal plate preheating device 4...Coating device 5...Drying device 1, lla...Metal plate 12...Laminated metal plate 20...Crimping device 21. 22...Pressure roll 23.26.27...Wrap roll 24.25...Auxiliary roll 28.29...Guide roll 30...Tension device

Claims (1)

[Claims] 1. In a method for manufacturing a composite material in which a resin layer containing conductive metal powder is provided between two metal plates, one or both of the opposing surfaces of the two metal plates are coated with resin, and the two metal plates are coated with resin. A method for producing a weldable laminated metal plate, which comprises crimping the plate with a pressure roll, and then crimping the plate while adjusting the winding pressure while winding the plate around the roll.