JPH0414446A - Manufacture of stacking plate using atmospheric pressure - Google Patents

Abstract

PURPOSE:To improve a layer-to-layer adhesiveness by a method wherein resin films are inserted between the plates made of materials in various kind, all the plates are placed in a metal or heat resisting plastic bag or in an airtight box-like container having a flat and smooth metal plate or the like as a pressure application face and the bag or container is heated with a vacuum produced therein and under the force of atmospheric pressure. CONSTITUTION:Thin stainless steel plates 1 stacked, for example, in ten tiers with vibration-damping resin films 2 interposed therebetween are placed between thin stainless steel plates, these steel plates are seam welded around their edges for formation into a bag 3 and a pipe is connected to a part of the bag to evacuate the same and then seam welded to keep the bag vacuous. In this condition, the bag is heated in a low temperature heating furnace and, after cooling, its periphery is cut off to remove the vibration-damping stainless steel plate therefrom. The stacking plate may be made of metal, wood, stone, plastic or other material on a single basis or in combination thereof. The copper or aluminum plates high in heat conductivity are also inserted between the stacking plates together with the resin films to permit a rapid interior heating and thus enhance the uniformity of inplane heating and adhesive strength.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing resin laminated metal plates etc. with excellent interlayer adhesion.

(Prior Art) Laminated plates of metal plates and resin are used as vibration damping plates, laminate plates, lightweight metal plates, simple crat plates, and the like. Methods for producing such laminates in the form of coils include the method described in Japanese Patent Application No. 64-34 originally developed by the inventors, and the so-called line manufacturing method in which the coil is gradually heated and bonded from one end. has been done. These manufacturing methods are suitable for mass production, but not for small quantity production. Also,
Because materials are misaligned during line production, it is difficult to stack thick or brittle materials. On the other hand, for the purpose of small-volume production or to laminate thick-walled materials or materials other than metal that cannot be easily bent, there is a manufacturing method in which sheets are laminated. This is a method of applying pressure while However, this method requires somewhat large and expensive equipment, and has drawbacks such as difficulty in uniformly transmitting pressure and easy generation of bubbles.

(Problems to be Solved by the Invention) The object of the present invention is to provide a method for manufacturing laminates of various materials in which adhesive resin films are sandwiched and bonded. Moreover, it is an object of the present invention to provide a method for manufacturing a laminated plate with excellent adhesion in a relatively simple manner without requiring large equipment.

(Means for Solving the Problems) The present inventors thought of using atmospheric pressure as a method of manufacturing a laminate of superior quality by applying uniform pressure to the entire board, and decided to apply atmospheric pressure to the entire material. In order to convey this information, we have found that it is appropriate to create a vacuum inside a bag made of a thin metal plate, or an airtight box with a flat metal plate as the pressurizing surface, and have completed the present invention. be. That is, in the present invention, after a resin film is sandwiched between plates made of various materials, the whole is placed in a bag made of metal or heat-resistant plastic, or an airtight box-shaped container with a flat metal plate as a pressure surface, and then ,
This is a method for producing a laminate with excellent interlayer adhesion, which is characterized by heating the laminate under atmospheric pressure by creating a vacuum inside the laminate.

Materials used for laminated boards include metal, wood, stone,
Plates made of plastic or other materials can be used alone or in combination as appropriate depending on the purpose.

In order to improve manufacturing efficiency, a desired combination of laminates is generally inserted into a bag or box-shaped container in multiple layers.
If too many layers are stacked, even if atmospheric pressure can be applied to the inside, it will take too long to heat the inside.
Because of the problem of overlapping, there is naturally an appropriate limit to the thickness of the overlap. However, if a highly thermally conductive copper plate or aluminum plate is inserted together, it is possible to heat the inside quickly, and at the same time, it is possible to improve in-plane heat uniformity and uniformity of bonding strength during heating.

In addition, if the material is thin and good flatness cannot be obtained, it is possible to stack the materials in a flatter state by stacking -V flat metal plates together as a surface plate. It is.

According to the present invention, air bubbles are completely removed from the interface of the laminate by evacuating the inside of the bag or box-shaped container containing the laminate material, and the adhesion between the material plate and the resin film is particularly good. Furthermore, since the present invention requires relatively simple equipment, it is suitable for manufacturing a wide variety of products in small quantities.

The degree of vacuum in the vacuum container is not particularly necessary from the viewpoint of pressure. If a complete vacuum is created, a pressure of 10 tons/m2 can be applied. Therefore, the atmospheric pressure inside the container (7so
1 ton/m by just lowering it by 1/10 of torr)
You can apply the pressure of 2. However, when heated for bonding, the air inside the bag expands, so it is necessary to keep the pressure below about 360 torr, about half of atmospheric pressure, so that some pressure remains even when the temperature rises. Furthermore, if the heating temperature becomes high, the oxygen in the bag may cause deterioration of the material (for example, oxidation of the metal surface), so from this point of view it is better to further increase the degree of vacuum. Generally, a rotary vacuum pump is used to create a vacuum, or it can easily achieve a vacuum of several tons to 10-'torr, and if an even higher vacuum is desired, a two-stage rotary vacuum pump is used. By using 10torr
It is also possible to evacuate.

In general, it is quite fragile, and there are very few cases where a higher degree of vacuum is required.

Hereinafter, the present invention will be specifically explained with reference to Examples.

(Example 1) As shown in Figure 1, the thickness is 0.4 mm and the width is 1000 mm.
A damping resin film (polyolefin type) (2) with a thickness of 70 μm and the same width and length as the stainless steel is placed between two thin plates (1) of 5US304 stainless steel with a length of 2000 mm. After stacking the items in 10 layers, they were placed between 5U5430 stainless steel thin plates with a thickness of 0.3 mm, a width of 1219 mm, and a length of 2438 mm, and the periphery was seam welded to form a bag (3). A vibrator was attached to the bag, and the inside of the bag was evacuated using the vibrator. After evacuating for about 1 hour, the vibrator part was seam welded and sealed in a vacuum. The degree of vacuum is 0.1 to 5 TORR, and the same applies to Examples 2 and below.

In this state, the bag was heated in a low-temperature heating furnace at 190°C for 2 hours, and after cooling, the bag was cut around the bag to a thickness of 0.87 mm and a width of 1 mm.
10 vibration-damping stainless steel plates with a length of 2,000 mm and a length of 2,000 mm were taken out.

When we measured the adhesion strength of this vibration-damping stainless steel plate, we found that
As shown in Figure 2, each plate has a T-peel strength of 8K.
It showed sufficient adhesion strength of approximately g/25 mm.

(Example 2) As shown in Figure 3, the thickness is 1 mm, the width is 300 mm, and the length is 1 mm.
A nylon resin film (4) with a thickness of 30 μm, a width of 300 mm, and a length of 1000 mm is placed on both sides of a 000 mm 5US304 stainless steel plate (1), and a 30 μm thick nylon resin film (4) is placed on both sides of the 5US304 stainless steel plate (1).
Aluminum foil of 0μm, width 300mm, length 1000mm (
5) and stack them all to a thickness of 0.3 mm and a width of 600 m.
The bag was placed in a 5US430 stainless steel bag (3) with a length of 1,400 mm, was evacuated in the same manner as in Example 1, was heated to 220° C. for 2 hours in a low-temperature heating furnace, and then cooled.
When I cut around the bag, it was 1.1 mm thick and 300 mm wide.
An aluminum/resin laminated stainless steel plate with a length of 1000 mm was obtained. Further, the adhesion strength of this laminate was good, and it did not peel off when bent at the edges.

(Example 3) As shown in Fig. 4, the thickness is 0.4 mm, the width is 1000 mm,
A thin plate of 5US304 stainless steel with a length of 2000mm (
1) A thickness of 70 μm and a width of 1000 mm between each of the five sheets,
A damping resin film (2) with a length of 2000 mm was sandwiched.

In this state, the stainless steel is thin and the flatness is not good, so the
Place O3304 stainless steel (6) underneath as a surface plate,
These were placed in a bag in the same manner as in Example 1, sealed in a vacuum, heated, and after cooling, the bag was cut around the bag, and the thickness was 2.
A multilayer resin laminated stainless steel plate with a diameter of 3 mm, a width of 1000 mm, and a length of 2000 mm was obtained. The flatness of the laminate was good. Further, the adhesion strength of each layer was very good, and was about 8 kg/25 mm, similar to Example 1.

(Example 4) As shown in Fig. 5, a 5US304 stainless steel plate (1) with a thickness of 1 mm, a width of 500 mm, and a length of 500 mm and an SS41 steel plate (common steel) (7) with a thickness of 15 mm, a width of 500 mm, and a length of 500 mm (7 ) with a thickness of 70 μm and a width of 500 m.
500mm in length, sandwiching a damping resin film (polyolefin type) (2), stacked in two layers with the stainless steel facing outward, and then stacking them into a 5US3 structure as shown in Figure 6.
The mixture was placed in a box (8) made of 04 stainless steel, heated to 190° C. while being evacuated, and then cooled. 9 is a vacuum pipe, 10 is a lid, and 11 is an O-link for vacuum sealing. When I took the laminate out of the box, I found that the stainless steel and ordinary steel were firmly joined together just like a clad plate, creating a simple clad plate.

(Example 5) As an example of joining stainless steel and wood, a laminate using lauan material was manufactured as shown in FIG. 7. 250mm
To make a laminate with dimensions of x900mm, the thickness is 18mm.
A lauan material (14) and a 5US304 stainless steel plate (1) with a thickness of 0.4 mm were prepared. J7 on both sides of lauan wood
One set was made by stacking stainless steel (1) with a 60 μm thick ethylene/ethyl acrylate copolymer resin film (13) in between, and these were stacked in five stages. As it is, it will take some time to raise the temperature inside, so the thickness is 1.5cm.
After sandwiching an aluminum plate (15) of 1.5 mm in thickness, the whole was made into a sheet with a thickness of 0.3 mm, a width of 1000 mm, and a length of 200 mm.
Place it between 0mm heat-resistant nylon films, heat-bond the periphery to form a bag (12), attach a pipe (9) to a part of the bag, use this pipe to evacuate the inside of the bag, and then place it in a low-temperature heating oven at 90°C. After heating for 3 hours, the mixture was cooled. When the bag was cut around and the contents were taken out, no scorch was observed on the lauan material, and five laminates with stainless steel on both sides were obtained. The adhesion strength of each plate was also good.

(Effects of the Invention) Since no special pressure device is required, large-sized laminates with good bonding properties can be manufactured using relatively small equipment.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of Example 1. FIG. 2 is a diagram showing the adhesion strength of the resin laminated metal plate obtained in Example 1. FIG. 3 is an explanatory diagram of the second embodiment. FIG. 4 is an explanatory diagram of Example 3. FIG. 5 is an explanatory diagram of Example 4. FIG. 6 is a diagram showing an example of a box-shaped container. FIG. 7 is an explanatory diagram of the fifth embodiment. 1.5 US304 steel plate 81 box 2, vibration damping resin film 9. Vibrator 3, bag (SUS
430) 10. Lid 4, nylon resin film 11
．． 0 ring 5, aluminum foil 14. Lauan wood 6
, surface plate 15. Aluminum plate 7.3S
tl steel plate

Claims (3)

[Claims] (1) Alternately stack metal, wood, stone, plastic, or other material plates and resin films for bonding, place the whole thing in a bag made of metal plates (foil) or heat-resistant plastic film, and open the bag. A method for manufacturing a laminate, which is characterized by applying atmospheric pressure by creating a vacuum and heat-pressing the entire bag. (2) The method according to claim 1, wherein a box-shaped container made of metal or heat-resistant plastic that can be vacuum-sealed and can be used repeatedly is used instead of the bag. (3) The method according to claim 1 or 2, wherein a copper plate or an aluminum plate is inserted into a bag or a box-shaped container to improve in-plane heat uniformity and uniformity of bonding strength during heating.