JPH02196648A - Production of weldable laminated metal plate - Google Patents

Abstract

PURPOSE:To stably produce a weldable metal composite even when a conductive metal powder low in hardness such as a Cu or Al powder is used by a method wherein a resin is applied to one of or both of the opposed surfaces of two metal plates to bond both metal plates under pressure by press rolls and, after both metal plates are wound around a roll to be pressed, pressure is further applied to both metal plates from the outside thereof toward the center of the roll under control by a press belt while temp. and pressure are continuously applied thereto for several sec-several ten sec to bond both metal plates under pressure. CONSTITUTION:A metal plate 11a coated with a mixture of a filler composed of a conductive metal powder and a liquid resin is superposed on the other strip like metal plate 11 and both metal plates are bonded between press rolls 21, 22 under pressure and passed therebetween while the press bonding forces toward the centers of both rolls are held to be taken up by a taking-up apparatus through a tension apparatus 30. In this case, the holding of the press bonding forces toward the centers of both rolls 22, 23 is realized by controlling the tension apparatus 30 and/or press belt, 25, 26 for pressing two metal plates from the outsides of the rolls 22, 23. By this method, a laminated metal plate excellent in weldability and adhesiveness is easily obtained.

Description

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

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

Such a conventional weldable laminated metal method is shown in FIG. A coiled metal plate 11, lla is prepared by a pair of uncoilers 1, la, and after pretreatment in a degreasing process and a cleaning process, a conductive filler and a 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, one metal plate is stacked on top of the other, and the other metal plate is pressed with a pressure roll 6, and the resulting composite metal plate 12 is rolled. It is wound up by the take-up device 7.

In the case of the conventional method, since the pressure roll 6 is used for crimping as shown above, two metal plates 11. It is not easy to crimp lla because the crimp time is extremely limited, and it has been difficult to produce a reweldable composite metal plate 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.

[Problem to be Solved by the Invention 1] What the present invention proposes is not to perform pressure bonding in an extremely short period of time using only pressure rolls, which is used in the prior art (instead of applying pressure and pressure continuously for several seconds to several tens of seconds). The purpose of this is to press-bond two metal plates while effectively utilizing the material.

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

(Means for Solving the Problems) 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, in which one or both of the opposing surfaces of the two metal plates are provided. After coating the two metal plates with a resin and pressing them together with a pressure roll, the two metal plates are wrapped around the roll and pressurized, and then a pressure belt is applied from the outside of the two wrapped metal plates toward the center of the roll. It is characterized by crimping while controlling the pressure.

[Operation 1] Figs. 1 to 3 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 is stacked on the other band-shaped metal plate 11, and a pressure roll 21 and a pressure roll 22 are stacked on top of each other.
Crimp between. Then roll 22 and roll 23
The sheet is passed through the roll while maintaining pressure in the center direction of the roll, passes through a tension device 30, and is wound up by a winding device. In this case, a strong tension device 30 is used to apply sufficient pressure to the two metal plates 12 bonded together for crimping.
is required. For this reason, we developed an external pressure device using an elastic belt as shown in 25.26.

The tension device 30 and/or the rolls 22 and 23 are used to maintain the pressure in the center direction of the rolls 22 and 23.
Pressing belt 25.2 for pressing two plates from the outside
This is achieved by controlling 6. Examples of the configuration of the pressure belts 25 and 26 are shown in FIGS. 2 and 3.

That is, the movable rolls 25b and 25c are in close contact with the surface of the roll 22, and the tension of the belt 25 applies a pressing force to the metal plate 12 toward the center of the roll 22. In addition,
As shown in FIGS. 2 and 3, the tension of the belts 25, 26 is adjusted by adjusting the rolls 25a, 26a in the v-v' direction.

In addition, the pressure rolls 21 and 22, the winding roll 23, and the roll 24 are heated to a temperature of 150 to 20°C by induction heating or the like.
The pressure roll 21 is a roll that can be adjusted between 0°C.
．． At least one of the members 22 is movable in the vertical direction, and is configured to be able to apply pressure in the vertical direction. Note that the belt 25 may be a snubber roll having a pressing function.

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

In FIG. 1 showing an embodiment of the apparatus that can suitably carry out the method of the present invention, one metal plate (band) lla is coated with a resin containing metal powder using a coating device 4 such as a sprayer, and
It is dried by a drying device 5 and then transferred to a compression bonding device 20. The other metal plate (strip) 11 is preheated by the metal plate preheating device 3, and then transferred to the crimping device 20. Both metal plates (strips) 12 are transferred to the crimping device 20 by pressure rolls 21, 22, and the wrapping is carried out by the roll 2.
3.24 and the pressure belt 25.26, the pressure roll and the winding are pressed together while adjusting the pressure and temperature toward the center of the roll to be maintained for a certain period of time.

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

Therefore, when the sheet passing speed is high, it is effective to increase the number of pressure rolls so that the pressure and temperature can be maintained as shown above.

By the method described above, it was possible to produce a weldable laminate metal film with sufficient reliability.

In addition, regarding the conditions such as resin layer thickness and metal powder, already known methods, such as the method shown in Patent Publication No. 60-912, etc. can be used.

[Effects of the Invention] According to the present invention, a laminated metal plate with excellent weldability and adhesiveness can be easily obtained, and the quality and yield can also be improved. can be obtained.

[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. l...Uncoiler 3...Preheating device 4...-Coating device 5...Drying device 11, lla...Metal plate 20...Crimping device 21.22...Pressure roll 23.24・・・Wrap with roll 25, 26, ・・・press belt

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 weldable weldable method characterized by crimping the plates with a pressure roll, then wrapping them around the roll and applying pressure, and then crimping the two metal plates wrapped around the roll with pressure from the outside toward the center of the roll using a pressure belt. Method for manufacturing laminated metal plates.