JPH01501776A - Lamination of sheet materials - 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] Lamination of sheet materials Technical field FIELD OF THE INVENTION This invention relates to lamination of sheet materials under heat and pressure. In particular, the present invention relates to laminating copper foil to a dielectric plate.

Background technology Traditionally, copper composite laminates are made of a sheet of partially cured resin-impregnated base material and a sheet of copper foil. Manufactured by heating and pressurizing a stack of press plates in a laminated press. ing. In International Publication No. 8502969, copper is electrodeposited on a press plate. A similar method of this type has been described. Conventionally known laminating presses are heated This is a hydraulic press with a lower platen that applies heat to the top and bottom surfaces of the stack of materials to be stacked. and pressure can be applied. This results in lateral forces during the lamination process that cause the resin to tends to be pushed out.

Disclosure of invention The present invention can be applied to sheets to be laminated by hot pressurized fluid in an autoclave, for example. The idea is to apply heat and pressure to a stack of wood from the outside.

According to the present invention, when heating and pressurizing a stack of sheet materials to be laminated, A stack is provided within an enclosure that is sufficiently deformable to transmit external pressure to the heavy object; The majority of the container should be thermally conductive, the surrounding container should be evacuated, and the area around the surrounding container should be free of high heat. It is characterized by heating and pressurizing the surrounding container from the outside by applying a pressurized fluid of Ru.

Before applying heat and pressure to remove gases or vapors generated within the stack. It is preferable to evacuate the enclosure during heating and pressurization, but it is also preferable to evacuate the enclosure during heating and pressurization. It's okay to worry about it.

Liquids can be used as the fluid, but gases (e.g. air, nitrogen or carbon dioxide) can be used as the fluid. gas) is recommended. Preferably, the fluid is circulated so that the outside of the enclosure is It is best to maintain an even temperature around the entire circumference.

The enclosure container has a supporting bottom plate on which the stack is placed and supported, a pressure- and heat-resistant lid, and a bottom supporting the lid. It is preferable to include means for airtightly sealing the plate.

The plastic material lid acts as an undesirable thermal barrier between the hot fluid and the stack. heating the stack unevenly and increasing the time required to raise the temperature of the stack. , lengthen the press cycle time.

Therefore, according to the invention, the heat applied from the outside by the hot pressurized fluid A pressure- and heat-resistant lid used to enclose a stack of sheet materials to be laminated under pressure. and the lid includes a plurality of substantially rigid thermally conductive portions, the portions being They are connected to each other by several deformable parts, which allow them to be applied from the outside. The pressure applied presses the thermally conductive portion against the stack, transferring heat and pressure to the stack. to communicate. a plurality of grooves on the inner surface of one or more thermally conductive portions; can be provided. Such grooves guide gases and vapors during lid evacuation useful for. The thermally conductive part is substantially rigid (compared to the deformable part) However, it should have a slight degree of flexibility sufficient to adhere tightly to the surface of the stack.

Preferably, the lid is provided with a deformable skirt, which allows the lid to be attached to the supporting base plate. Allows for easy airtight sealing.

The deformable part (and skirt) is preferably made of plastic material and It is preferably made of an elastic material such as silicone rubber. The thermally conductive part is a metal plate. Aluminum is a good and preferred metal to build from due to its thermal conductivity, light weight and low cost. preferred, but other metals such as copper, brass, and steel may be used as required. Can be done.

The lid has a thermally conductive top plate that should be in contact with the top end surface of the stack, and a small plate that should be in contact with the sides of the stack. It is preferable to have at least one thermally conductive outer peripheral side plate.

The invention will now be further explained by way of examples with reference to the accompanying drawings.

Brief description of the drawing Figure 4 shows the enclosure that surrounds the stack of sheet materials to be laminated in the production of copper composite dielectric plates. It is a perspective view of a container.

Figure 2 is a diagrammatic cross-sectional view of the enclosure showing the state of the stack before the interior of the enclosure is evacuated. It is.

FIG. 3 is an enlarged partial view of the inner surface of the enclosure.

Best mode for carrying out the invention The illustrated enclosure includes a lid 1, an aluminum supporting bottom plate 2 with a thickness of 5 to 10 mm, It includes a rectangular presser frame 3 made of an aluminum channel member with a square cross section. push The frame 3 can be connected to a vacuum source via multiple (or one) valves 4, and A heat-resistant rubber seal that can hold the presser frame 3 on the support base plate 2 by vacuum action. It has 6.

The presser frame 3 is attached to a flexible skirt 7 made of heat-resistant rubber that constitutes a part of the lid 1. It is attached. The outer peripheral wall of the lid 1 consists of four aluminum side plates with a thickness of 5 to 10 mm. 8, and grooves 9 (see Fig. 3) with a depth of about 1 mm are provided on the inside of these side plates. I'm being kicked. The side plate 8 is a heat-resistant rubber corner member 1 connected to the skirt 7. They are connected to each other by 1.

The lid 1 has an aluminum top plate 12 with a thickness of 5 to 10 mm, and the surface area of this top plate is It is made slightly smaller than the surface area of the stack 13 to be surrounded. The top plate 12 is made of heat-resistant rubber. It is connected to the side plate 8 by a flexible border member 14 of the arm.

The components of the lid 1 are assembled so that they are impermeable to carbon dioxide, nitrogen gas, and air. There is.

The stack 13 is made of partially cured resin-impregnated material (or to produce a copper composite dielectric plate) multiple sheets of any dielectric material suitable for bonding to copper) and these sheets A press plate (e.g. stainless steel plate) inserted between the sheet and the press plate. a copper foil (self-supporting or affixed on a press plate) interposed between the two.

In use, the lid 1 and the presser frame 3 are placed over the stack 13 on the support base plate 2. Next Then, a vacuum is applied to the presser frame 3 through the valve 4 to place the skirt 7 of the lid 1 onto the support bottom plate 2. Keep it in close contact. Next, the inside of the lid 1 is through the valve 16, which deforms the flexible part 11.14 of the lid 1 and The qualitatively rigid parts 8, 12 are crushed against the stack 13.

Next, place the evacuated assembly into an autoclave and The hot gas is circulated through a heat exchanger, for example by a blower, and then The temperature and pressure inside the stack are raised to the required temperature for lamination of the stack 13.

The gas pressure is distributed throughout the stack by the enclosure constituted by the supporting base plate 2 and the lid 1. transmitted to all surfaces. The heat of the gas is transferred to the aluminum support base plate 2, side plates 8 and top plate. The plate 12 provides rapid and substantially uniform transmission to all sides of the stack.　′加 The gas or vapor that spreads into the enclosure during heating is removed by a vacuum source outside the autoclave. It is evacuated via valve 16 by a vacuum line connected to .

According to the method described above, the heat penetrates quickly and uniformly, thus reducing the heat inside the stack. Equilibrium is quickly achieved. Therefore, it can withstand a wide range of resin curing conditions (time, temperature). It can be made to correspond. Easily removes trapped air that is harmful to the laminate It will be done.

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Claims (10)

[Claims] 1. Pressure-resistant, heat-resistant deformable material surrounding the stack (13) of sheet material to be laminated an enclosing vessel, the stack being subjected to heat applied from the outside by a hot pressurized fluid. and used to heat and pressurize the stack of sheet material (13) under pressure. The apparatus includes: (a) a thermally conductive device supporting the stack (13); a sexual support sole plate (2); (b) a lid (1) covering the stack (13) on the support base plate (2); (1) comprises a substantially rigid thermally conductive top plate (12) covering the top surface of the stack (13); , substantially rigid thermally conductive side plates (8) covering the sides of the stack (13); Deformable connecting parts (11, 14) that connect the side plates and the top plate (8, 12) to each other. ) and a deformable skirt (7), the thermally conductive plate is (8, 12) is pressed against the stack (13) by the deformable connection. The parts (11, 14) and the skirt (7) allow to accumulate both heat and pressure. configured to transmit to a critical body, and (c) means (3) for hermetically sealing said skirt (7) to the supporting base plate (2); ,4,6) used for applying heat and pressure to a stack of sheet materials characterized by comprising: Device. 2. The thermally conductive plates (8, 12) and the thermally conductive support base plate (2) are all made of the same material. 2. A device according to claim 1, wherein the two layers have substantially the same thickness. 3. The thermally conductive plates (8, 12) and the supporting bottom plate (2) are made of aluminum; 3. A device according to claim 2 having a thickness of ~10 mm. 4. At least one thermally conductive plate (8) has a plurality of grooves (9) on its inner surface Apparatus according to claim 1. 5. Heat is applied to the stack of sheet materials to be laminated by the apparatus according to claim 1. (a) supporting the stack (13) of sheet materials to be laminated; Place it on the holding bottom plate (2), cover it with a lid and enclose it in an enclosing container, (b) enclose it. The inside of the container is evacuated and a high-temperature pressurized fluid is applied to the outer periphery of the surrounding container. The vessel is heated and pressurized from the outside, thereby increasing the substantially rigidity of the lid (1) of the enclosing vessel. The thermally conductive plates (8, 12) are crushed against the top and side surfaces of the stack (13). The heat of the high-temperature pressurized fluid is transferred by the top plate and side plates (12, 8 and the support bottom plate (2)). The stack of sheet material is heated and transmitted substantially uniformly over the entire surface of the stack (13). method of applying pressure. 6. The method according to claim 5, wherein the surrounding container is evacuated before heating and pressurizing. Law. 7. 6. The method according to claim 5, wherein the surrounding container is evacuated while being heated and pressurized. 8. 6. The method of claim 5, wherein said fluid is a gas. 9. 6. The method of claim 5, wherein said fluid is circulated. 10. The stack (13) is suitable for bonding to copper to produce a copper composite dielectric plate. a plurality of sheets of dielectric material, a press plate interposed between the sheets, and a plurality of sheets of dielectric material; The method according to claim 5, further comprising a copper foil inserted between the plate and the press plate. .