JPH0258096B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a laminate, particularly to a molding process.

[Conventional technology and problems]

In recent years, vacuum forming presses have been put into practical use.
In this vacuum forming press device, the workpiece is sealed between pressure plates with a sealing material, and the space inside the sealing material is depressurized to form the object.

When forming a laminate using such a vacuum forming press, it is expected that the resulting laminate will be free from scratching defects, but the sealant may be difficult to handle and workability may be poor, or the seal may be difficult to handle. There was a problem that molding defects occurred because the effect was not sufficient.

[Problem to be solved by the invention]

In view of the above circumstances, it is an object of the present invention to provide a method in which the sealing material is easy to handle, the sealing effect is high, and molding defects are less likely to occur when forming a laminate in a vacuum atmosphere.

[Means to solve the problem]

In order to solve the above problems, the method for manufacturing a laminate of the present invention includes a step of sandwiching the laminate between pressure plates and press forming the laminate, and the step includes applying a sealing material around the laminate between the pressure plates. In the method of sealing and reducing the pressure in the inner space of the sealing material, the sealing material is constructed by using a highly elastic material provided in a groove on the surface that contacts the pressure plate so as to sandwich the frame material. That's what I do.

[Effect]

The sealing material of the laminate manufacturing method of the present invention is made by sandwiching the frame material between highly elastic materials having grooves on the surface that contacts the pressure plate, and therefore exhibits the following useful effects.

First, since the sealing material has a frame material, it has shape retention properties and is easy to handle. Usually, there are many sealing materials with a side of about 1 m, and conventional sealing materials without frames have no stiffness and do not have a constant shape when handled, making them very difficult to handle and reducing work efficiency.

Another is that the sealing action is reliable. This is because there are grooves on the contact surface of the highly elastic material, and the sealing material tightly adheres to the pressure plate. In the past, failures occurred due to insufficient sealing, but in this case, the failure occurred at an advanced stage of the process, resulting in significant damage. Therefore, it is a very big advantage that the sealing action is reliable and the generation of defective products can be prevented.

〔Example〕

Below, one of the devices used to carry out this invention will be described.
A detailed explanation will be given based on drawings showing examples.

FIG. 1 shows a cross section of a part of an example of an apparatus used for carrying out the present invention when pressurized.

As shown in FIG. 1, a carrier plate 1 is placed on a conveyor (not shown), a laminate 2 made of a resin-impregnated base material (prepreg) is placed on top of the carrier plate 1, a hot plate 3 is lowered from above, and the carrier plate 1 is placed on a conveyor (not shown). The laminate 2 is sandwiched between a plate 1 and a hot plate 3, and pressure molded. Carrier plate 1
A frame-shaped sealing material 4 is placed on the carrier plate 1 so that the laminate 2 is surrounded by the frame-shaped sealing material 4 between the carrier plate 3 and the heating plate 3 .

As shown in FIGS. 1 to 3, if the frame-shaped sealing material 4 has a structure in which a frame material 6 is sandwiched between highly elastic substances 5, 5, it has shape retention properties, so that The frame-shaped sealing material is easier to handle and workability is improved. Highly elastic substances 5, 5 are pressure plates (in this example, carrier plate 1 and hot plate 3).
If the sealing is performed by hitting the object, the sealing will be more complete. In the frame material 6,
A hole 7 connecting the inside and outside of the frame is provided, and a vacuum hose joint 8 is connected to the opening of the hole 7 to the outside of the frame.
is provided. At the start of pressing, a vacuum hose (not shown) is connected to this joint 8, and the pressure inside the frame-shaped sealing material 4 is reduced to perform vacuum forming.

In the case of the manufacturing method according to the present invention, the invention can be easily carried out using the conventional press device as it is, as long as only the sealing material is prepared, without modifying the conventional press device. Of course, vacuum forming
Since air in the resin can be eliminated during laminate molding, it is possible to reduce scratching defects (resin impregnation defects) in the resulting laminate. Voidless molding is also possible, which prevents deterioration of the properties of the laminate, such as deterioration of insulation properties in electrical applications.

In the above embodiment, the highly elastic substances 5, 5 were silicone (silicone seal), but by doing so, even if the resin flows from the laminate 2 during molding and hardens, it will be difficult to bond. , it becomes easier to leave. In addition to silicone, examples of substances having high elasticity include, but are not limited to, substances having rubber-like elasticity such as synthetic resins and rubbers.

In the above embodiment, the frame material 6 was an aluminum frame, but if it is made in this way, it will be easier to process and the sealing material 4 will be lighter, making it easier to handle.

In the above embodiment, the highly elastic materials 5, 5 have a shape such that the cross section thereof is shown in FIG. 3, for example. To give an example of dimensions, a=7,
b=20±0.5, c=7+0.5(-0), d=3, e=
14±0.1, f=16±0.1, R (radius)=1.5, C...1mm
taper (all units are [mm]), but the taper is not limited to this. If the material having high elasticity is provided with grooves 9 on the surface that comes into contact with the pressure plate as in this embodiment, the adhesion to the pressure plate will improve when pressure is applied, and the pressure will be absorbed and the material may bend. is also prevented. Therefore, better sealing can be achieved.

Note that the laminate is made of predetermined sheets of prepreg and/or
Or a stack of resin sheets, a stack of pre-preg and/or a metal foil on at least one side of the resin sheet, or a stack of metal foil on at least one side of the prepreg and/or resin sheet, or a stack of prepreg and/or resin sheets stacked with metal foil, or /or one set or two or more sets stacked with resin sheets interposed therebetween; however, the present invention is not limited thereto. When two or more sets are stacked, a film or a molding plate to prevent mutual adhesion may be sandwiched between each set. A release film, a cushion, etc. may be sandwiched between the laminate and the pressure plate.

Pressure plates are used to sandwich and press-form the laminate, and include, but are not limited to, hot plates, carrier plates, and molding plates.

The frame-shaped sealing material may also be other than those mentioned above.

In the above embodiments, the laminate is placed on a carrier plate on a conveyor, but it may also be placed on a hot plate instead of on the conveyor.
There are various pressurizing directions, such as vertical and horizontal directions.

This invention is not limited to the above embodiments.

[Effects of the Invention] As described above, in the method for manufacturing a laminate of the present invention, since the sealing material is made of a highly elastic material having grooves on the surface that contacts the pressure plate and sandwiching the frame material, the sealing material It is easy to handle and work can be done efficiently, and the sealing effect is reliable and the occurrence of defects is suppressed.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of an example of the device used to implement this invention, and Figure 2 is a plan view of the aluminum frame used in it, and Figure 3 is a silicone plate used in it. FIG. 3 is an enlarged cross-sectional view of the seal. 1... Carrier plate, 2... Laminate, 3... Heat plate, 4... Frame-shaped sealing material.

Claims (1)

[Claims] 1. The method includes a step of sandwiching the laminate between pressure plates and press-forming the laminate, and the step includes sealing around the laminate with a sealing material between the pressure plates, and filling the inner space of the sealing material. A method for manufacturing a laminate, which is carried out under reduced pressure, characterized in that the sealing material is made of a highly elastic material having grooves on the surface that contacts the pressure plate and sandwiching the frame material. . 2. The method for manufacturing a laminate according to claim 1, wherein the highly elastic material is silicone. 3. The method for manufacturing a laminate according to claim 1 or 2, wherein the frame material is an aluminum frame.