JPS6287328A - Attaching and detaching of vacuum joint in autoclave molding of printed wiring board - Google Patents

Abstract

PURPOSE:To realize the automatic joining and separating of vacuum joints by a method wherein a truck is carried in a vessel and positioned and a vacuum joint attaching and detaching means, which attaches and detaches each vacuum joint through the actuation of a back and forth shifting mechanism, is provided. CONSTITUTION:Firstly, a truck 5, onto which molding materials 1 are seated, is carried in a vessel 2 and stopped by stoppers 23 of rails 22 so as to be positioned in order to allow to join the vacuum joint 9a provided on each surface plate 7 with the vacuum joint 9b provided on each joint holder 44. Secondly, a sliding shaft 47 is shifted forwards by extending a piston rod part through the actuation of an air cylinder 43 so as to shift the point holders 44, which join to the sliding shaft, along the guide shaft 46 of a guide plate 45 in the interior of the vessel 2 in order to join a plurality of the vacuum joints 9b with a plurality of the vacuum joints 9a provided on the surface plates 7 seated onto the truck 5. Finally, after molding, a door 3 is open and the air cylinder 43 is actuated in reverse manner so as to shift a sliding shaft 38 and the joint holders 44 sidewise the vessel 2 in order to separate the vacuum joints 9a and 9b from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to vacuum heating and pressure forming in an autoclave of printed wiring boards, copper-clad laminates, non-copper-clad laminates, etc. used in electronic equipment such as computers and communication equipment. The present invention relates to a device for coating, sealing, and reducing pressure on molded materials such as printed wiring boards.

2. Prior Art Conventionally, as a technique for coating and sealing a molded material such as a printed wiring board to reduce pressure, for example, Japanese Patent Application No. 17451/1982 and Japanese Patent Application No. 27480/1989 filed by the present applicant have been used.
No. 60-136315, etc.

In addition, as a technology to seal and depressurize the molding phase of an FRP laminate consisting of reinforcing fibers and 11 ft of 7-trix wood,
Japanese Unexamined Patent Publication No. 57-51422 is known.

These technologies involve stacking molded materials on a surface plate (also called a platen or aluminum substrate) 1 between mirror plates or in multiple stages without using mirror plates, and placing a cloth breather on top of the stack. Then, cover it with a heat-resistant and flexible vacuum bag film, and seal it with a sealant, or seal the metal frame and lid to form a sealed chamber, and then remove the trolley. ” and transported into the pressure vessel on the second shelf.
An operator performed the work of connecting the inside of the sealed vacuum bag film or the sealed chamber to the external upstream side of the pressure vessel 1) with a vacuum joint for depressurization provided.

After sealing the inside of the pressure vessel, the pressure inside the vacuum bag film or the sealed chamber is increased to 8 K and high pressure steam is supplied to the inside of the vessel, or high pressure gas is supplied to heat the emitting gas. The molded material is heated and pressed to harden the adhesive and then molded.

Problems to be Solved by the Invention However, these techniques have the following problems.

For example, if a truck has five shelves, this work can be done by replacing the vacuum joints on the surface plates of each shelf with vacuum joints for depressurization installed from the outside of the pressure vessel to the inside. Since the pressure vessel is made as small as possible from a cost perspective, there is not enough space inside the vessel to connect or disconnect it, making it extremely difficult and time-consuming, and as shown in Figure 1. In the case where two rows of shelves are provided in the depth direction, the removal work is more difficult to perform, requires a lot of man-hours, and obstructs automation, so there is a strong need for improvement in workability.

The present invention was developed with the aim of solving the various problems mentioned above.

Means for Solving the Problems As shown in FIGS. 1 to 7, the vacuum joint attachment/detachment device for autoclave molding of printed wiring boards, which is the present invention, has a plurality of vacuum joint attachment/detachment devices mounted on a cart 5 that can be carried into a pressure vessel 2. A shelf 6 is provided on which two surface plates 7 can be placed at intervals, and each surface plate 7 has one side 9 of a vacuum joint.
a molded material conveying means F protruding from the side of the container 2; Part J
are supported by a back-and-forth moving mechanism K that moves the cart 5 back and forth inward from the side of the inside of the container 2, and the cart 5 is carried into the container 2 and positioned, and the respective vacuum joints are moved by the action of the back and forth moving mechanism. 9a and 9b are attached and detached.

EXAMPLES Hereinafter, an apparatus for carrying out the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the apparatus for carrying out the present invention is as shown in FIGS.
A pressure vessel 2 for storing and sealing the molded material 1 loaded on a shelf 6 of a truck 5-]-, and a high-pressure gas (for example, high-pressure nitrogen gas,
a pressurizing means A that pressurizes the molded material 1 by supplying (high-pressure carbon dioxide, high-pressure air, etc.); and a heating device that heats or cools the gas supplied into the pressure vessel 2 via a heat exchanger 4. A cooling means B, and an airtight chamber D into which the gas heated or cooled by the heating and cooling means 13 is carried into the container 2, or a vacuum bag in which the molded material 1 loaded on the surface plate 7'' is sealed. E
a circulation means C that blows and circulates air inward; and an airtight chamber in which the molded material 1 is loaded on a surface plate 7 and accommodated with a gap, and the inside is sealed so that it can be pressed from the top surface. D, or a molded material conveying means F provided so that a vacuum bag E containing a sealed molded material 1 loaded on a surface plate 7'2 can be placed on a shelf 6 on a trolley 5 and carried into the pressure vessel 2; A vacuum joint connected to the vacuum path provided on the surface plate 7 of each of the airtight chamber and the vacuum bag E, and a vacuum joint provided on the side surface of the pressure vessel 2 so as to be movable back and forth can be attached and detached. a Sheep step G and the vacuum joint IB? , gF stage G, and a pressure reducing means 1-i for reducing the pressure inside the airtight chamber [) and the vacuum bag r>.

Next, details of each abduction and means will be explained.

The molding material 1 is a material for forming a t'iir laminated board, includes an inner layer circuit board, and is composed of prepreg, copper foil, etc.

As shown in FIG.
A high-pressure gas such as high-pressure nitrogen gas, high-pressure carbon dioxide gas, high-pressure air, etc. of 20 kg/- or less is supplied through an automatic valve 11, and the gas is heated or cooled through a heat exchanger 4. Ru. The air is then exhausted through the automatic valve 12. Additionally, a safety valve 13 is provided to reduce the pressure inside the container 2 when it exceeds a predetermined pressure J.

As shown in FIG. 1, the heating and cooling means B supplies high-pressure steam from the outside of the container 2 to the heat exchanger 4 inside, and has an automatic valve 14 that supplies high-pressure steam and a cooling water supply. An automatic valve I5 is provided to penetrate the container 2 and communicate with the heat exchanger 4, and drain water from the automatic valve 16.

In addition, as another example of the heating and cooling means, a means for heating and cooling may be provided outside the container 2, and the heating and cooling gas may be supplied into the container 2. Moreover, an electric heater may be used as the heating means instead of high-pressure steam.

However, in this case, the heat exchanger 4 is used only for cooling.

As shown in FIG. 1, the circulation means C includes a fan 17 provided inside the container 2, and a motor 8 for driving the fan.
is installed outside the container 2 so as to maintain airtightness. The heating gas or cooling gas sent by the fan 17 passes through the outer periphery of the wind body plate 19 shown in FIGS.
It is designed so that it can be rotated and circulated.

As shown in FIG. 1, the pressure reducing means 11 includes a vacuum pump 20 installed outside the container 2, and the vacuum pump communicates with an automatic valve 21 and is connected to the interior of the container 2 through piping. The parts communicate with vacuum joints 9a and 9b, which will be described later, so that the pressure inside the airtight chamber I) and the vacuum bag E can be reduced.

As shown in FIGS. 1 and 2, the molded material conveying means r1 is
an airtight chamber D that is equipped with a suppressing member 25 that loads the molded phase 1 on a surface plate 7'' and accommodates it with a gap, and that presses the molded phase 1 from the upper surface, and that seals the inside thereof;
Alternatively, the vacuum bag E containing the molded material 1 loaded on the surface plate 7'' is placed on a shelf 6 on the trolley 5 so that it can be carried into the pressure vessel 2.

Then, at the time of delivery, the vacuum joint 9a provided on the surface plate 7 on the shelf 6 and the vacuum joint 9b provided on the side of the container 2, which will be described later, are attached. A stopper 23 provided on a rail 22 inside the container 2 is provided so that the position can be determined.

As shown in FIG. 5, the airtight chamber is constructed by enclosing the molded material 1 loaded on the surface plate 7-t with a side pressure prevention member 25 made of a rectangular frame with an appropriate gap between the surfaces and the surface plate 7-t. Side pressure prevention member 25
% at the first sealing member 26, n+ xt+
-Delivery Le&4F+bllkl'! + Eggplant 9 A side pressure protection 1
1. A flat plate-shaped suppression member 27 that presses the molded material is provided on the upper part of the 11 member 25 so as to be movable up and down with respect to the lateral pressure prevention member 25, and is sealed with a second seal member 28 to prevent the inside of the lateral pressure prevention member 25. It is designed to be sealed tightly. Furthermore, the surface plate 7 is provided with a vacuum path 29 for decompressing the airtight chamber.
is provided, and communicates with and connects to the vacuum joint 9a.

As shown in FIG. 6, the vacuum bag E is made by placing the molded material 1 in layers on a surface plate 7, and applying a pleather cloth 31 (a breather cloth is a material in which the inside of the vacuum bag is depressurized) on the surface of the molded material.
Even when pressure is applied to the container, it allows air and gas generated by reaction to pass through to maintain a uniform pressure load.

(Typically, heat-resistant glass cloth is used)
A vacuum path is created by covering the molded material with a vacuum bag film 32 (vacuum bag film is a heat-resistant and flexible film that isolates the molded material from the outside and adheres to the molded material using vacuum pressure). and,
Generally, a plastic film such as nylon 6, nylon 66, or polytetrafluoroethylene is used) and sealant l-33 (sealant melted) completely seals the molding material against the surface plate and maintains its sealing properties during molding. The surface plate 7 is used to reduce the pressure inside the vacuum bag E. A vacuum path 29 is provided for communication and connection to the vacuum joint 9a.

The surface plate 7 is a flat jig that stacks the molded material 1 and receives pressure applied from the upper surface of the molded material 1,
-1i12, a metal flat plate whose two surfaces are processed to be smooth is used because it has less distortion due to heating.

The vacuum joint attachment/detachment means G includes a joint support part +A, 1 that supports a plurality of vacuum joints arranged in tandem, and a back-and-forth movement mechanism that moves the joint support member back and forth inward from the side inside the container 2. It is composed of

As shown in FIG. 3, the back-and-forth movement mechanism includes a ring-shaped mounting seat 35 fixed to the side surface of the container 2, sealed from the outside with a sealing material 36, and a shaft holder 39 fitted. The bearing 37.3 is installed inside the shaft holder.
7 are fitted together, and a slide shaft 38 is inserted through the bearing and loosely engaged with the slide shaft 38 to support it so as to be movable back and forth.

Furthermore, a seal cover 40 is provided inside the shaft holder 39.
A seal member 41 is fitted into the inner circumferential groove of the seal cover to seal the slide shaft 38 and maintain airtightness within the container 2.

Further, a cylinder holder 42 is attached to the outer part of the shaft holder 39, and an air cylinder 43 is attached to the cylinder holder, and a piston rod portion of the air cylinder is connected to one end of the slide shaft 38. .

On the other hand, a joint holder 44 is fixed to the other end of the slide shaft 38 located inside the container 2, and a plate-shaped guide plate 45 is fixed to the end surface of the shaft holder 39 that protrudes inward of the container 2. I'm letting you do it. A guide shaft 46 is horizontally fixed to the upper and lower end positions of the guide plate, and the joint holder 44 is fitted onto the guide shaft via a slide bearing 47, and the action of the air cylinder/I3 is This structure allows the joint holder 44 to be moved back and forth.

As shown in FIGS. 3 and 4, the joint support member I is installed vertically in accordance with the spacing between the joint holder 44 and the vacuum joint 9a of the surface plate 7 placed on the second shelf 6 of the trolley 5. It is composed of a plurality of vacuum joints 9b.

Inside the joint holder 44, vacuum passages 48.48 communicating with the respective vacuum joints 9a, 9a are provided, and the vacuum passages 48.48 are grouped together in one place within the joint holder 44, and It is connected to the piping section of means H with a flexible hose.

The vacuum joint may be a vacuum coupler consisting of a male part and a female part, but preferably, as shown in FIG. The nipple 51 is formed so as to be able to fit into the male nipple, and to be pressed into contact with the male nipple.

Note that the vacuum passages 48 provided inside the joint holder 44 are not put together in one place, but are connected to each other with flexible hoses 50 and 50 as shown in FIG. By attaching vacuum gauges 53, 53 to each of these, and further piping to pressure reducing means H via automatic valves 54, 54, the vacuum state in each airtight chamber or vacuum bag E can be grasped, and the vacuum In case of accidents such as leakage, use an airtight room or vacuum bag E that does not cause leakage.
The molded material 1 inside can be protected, which is preferable in terms of quality control.

Then, by operating the air cylinder 43, the slide shaft 38 is moved inward of the container 2, and the joint holder 44 is moved forward along the guide shaft 46 of the guide plate, as shown in FIG. , the vacuum joint 9b provided on the joint holder 44 is coupled to the vacuum joint 9a provided on the surface plate 7 on the trolley 5, and the pressure inside the depressurizing means H is reduced to high vacuum to create a high vacuum in the airtight chamber I) or the vacuum bag. [This is designed to exhaust the air inside the chamber and the gas generated from the molded material 1.]

Next, its effect will be explained.

After placing the molding material 1 in layers on the surface plate 71- of the truck 5-4 shelf [i] and sealing it in the airtight chamber [) or vacuum bag E,
As shown in FIGS. 1 and 2, a trolley 5 on which the molded moon 1 is placed
is carried into the container 2, and the cart 5 is stopped at the stopper 23 of the rail 22. The vacuum joint 9a provided on the surface plate 7 and the vacuum joint 9b provided on the joint holder 44 are positioned so that they can be coupled.

Next, the air cylinder 43 shown in FIG. 3 is operated to extend the piston rod portion and move the slide shaft 47 forward. Then, by moving the joint holder 44 coupled to the slide shaft inward of the container 2 along the guide shaft 46 of the guide plate 45, the plurality of vacuum joints 9b provided on the joint holder 44 are moved to the base. If 5 , , 1 is connected to a plurality of vacuum joints 9a provided on the second surface plate 7.

Next, the vacuum pump 20 of the pressure reducing means L1 shown in FIG. and create a high vacuum inside.

Next, after sealing the inside of the container 2, the automatic valve to the pressurizing means]1
is opened and high-pressure gas is supplied into the container 2, the high-pressure gas is heated by the heating and cooling means B, and the heated gas is circulated into the container 2 by the circulation means C to cool the molded material in the airtight chamber or vacuum bag E. 1 is heated under pressure to harden the adhesive.

After a certain period of time has elapsed, the heating means is stopped, and then the automatic valve 15 shown in FIG. 1 is opened to supply cooling water to the heat exchanger 4 to cool the gas in the container 2. The molded material 1 is cooled and the pressure inside the container 2 is gradually discharged.

Then, once cooling is complete, all operations are stopped.

Then, after opening the door 3 and operating the air cylinder 43 in reverse to move the slide shaft 38 and the joint holder 44 to the side of the container 2 and detach the vacuum joints 9a and 9b,
The cart 5 is carried out and one forming process of the laminate is completed.

Note that the driving means for moving the vacuum joint back and forth is, for example,
It may be a hydraulic cylinder or a mechanism that converts the rotational motion of a motor into linear motion, and is not limited to the embodiments of the present invention.

Effect of the invention According to the present invention, the following effects are achieved.

A shelf on which a plurality of surface plates can be placed at intervals is provided on a trolley that can be carried into the pressure vessel, and each surface plate is provided with one side of a vacuum joint, and one side of the vessel is provided with a shelf. A protruding molded material conveying means and a joint support member provided with a plurality of vacuum joints arranged in tandem and facing inward of the container are moved back and forth inward from the inside side of the container. The cart is supported by a back-and-forth moving mechanism, and the cart is carried into the container and positioned, and each vacuum joint is attached and detached by the operation of the back-and-forth moving mechanism.
a41111! ! 1144-IZ 141% k &l Ill tut + ? +, %s 4s
z D. Old air joints can be automatically connected and disconnected, eliminating the need for workers to attach and detach vacuum joints, which was a problem in the past, making it possible to automate previous and subsequent processes and reducing man-hours. .

Furthermore, since the vacuum joints of multiple surface plates arranged in two rows in the depth direction of the pressure vessel can be connected and disconnected at the same time, a large number of laminates can be formed at once using a small pressure vessel, improving productivity. ” You can expect the second one.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway schematic side view of an apparatus for implementing the apparatus of the present invention. FIG. 2 is a schematic front view of FIG. 1. FIG. 3 is a partially cutaway schematic side view showing one embodiment of the device according to the present invention. FIG. 4 is a schematic front view of the apparatus shown in FIG. 3. FIG. 5 is a schematic front sectional view of the airtight chamber used in the device according to the present invention, showing a state in which a vacuum joint is connected. FIG. 6 is a schematic front sectional view of a vacuum bag used in the apparatus according to the present invention. FIG. 7 is a schematic front view of another device that connects and shuts off communication from a vacuum joint to a pressure reducing means. According to these figures, A: pressurizing means, B: heating and cooling means, C: circulation means, D=
Airtight room, I (empty bag, 1?: Molding material conveyance means,
G: Vacuum joint attachment l; L means, tT: pressure reduction means. , I: Joint support shrine, )<2 Back and forth movement mechanism, 1: Molded material, 2: Pressure vessel, 3: Door, 4: Heat exchanger, 5: Cart, 6
: Shelf, 7: Surface plate, 8: Vacuum path, 9a, 41b = Vacuum joint, 11.12: Automatic valve, 13: Safety valve, 14, 15, 1
6: automatic valve, °17: fan. 18: Motor, 1≦): Wind body plate, 20: 1￥ Empty pump. 21: automatic valve, 22: rail, 23: stopper. 25: Side pressure protection +1 member, 26: First seal member. 27: Pressing member, 28: Second sealing member, 29: Vacuum path, 31: Breather cloth, 32: Direct air bag film, 33 Nizi-lant, 35: Mounting seat. 36: Seal removal, 37: Bearing, 38 Ni slide shaft. 39: Shaft holder, 4 (1, seal cover, 41: seal member, 42 cylinder holder, 43: air cylinder, 44: joint holder, 45: guide plate, 46: guide shaft, 47: slide bearing, 48: vacuum road, 50: flexible hose, 51. nipple, 52: silicone hose,
53: Vacuum gauge, 54: Automatic valve.

Claims (1)

[Claims] 1. A shelf on which a plurality of surface plates can be placed at intervals is provided on a cart that can be carried into the pressure vessel,
Each of the surface plates is provided with a molded material conveying means having one side of a vacuum joint protruding from the side of the container, and a plurality of other vacuum joints arranged in a vertical line and facing inward of the container. The joint supporting member is supported by a back-and-forth movement mechanism that moves the joint support member back and forth inward from the side inside the container, and the cart is carried into the container and positioned, and each vacuum joint is moved by the operation of the back and forth movement mechanism. A vacuum joint attachment/detachment device for autoclave molding of printed wiring boards, characterized by comprising a vacuum joint attachment/detachment means adapted to be attached/detached. 2. A vacuum joint attaching/detaching device for autoclave molding of a printed wiring board according to claim 1, wherein the vacuum joint is provided so that the male mold and the female mold can be connected and separated so that the vacuum path can be communicated and interrupted. . 3. The vacuum joint attaching/detaching device for autoclave molding of a printed wiring board according to claim 1, wherein one side of the vacuum joint on the pressure vessel side is connected to a pressure reducing means outside the vessel.