JP3525211B2 - Vacuum laminating equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum laminating apparatus for laminating and molding a laminated material composed of two or more kinds in a vacuum atmosphere by heat and pressure treatment.

[0002]

2. Description of the Related Art A technique relating to an apparatus for forming a laminated material by pressurizing with a film in a vacuum chamber heated at a predetermined temperature is disclosed in JP-A-8-132531 and JP-A-10-1752.
29, etc.

[0003]

In the above conventional apparatus, the degree of vacuum inside the film body of the board having the film body does not rise sufficiently within a predetermined time, and the vacuum chamber has the same vacuum pump as the inside of the film body. When connected, the degree of vacuum in the vacuum chamber does not rise, and thus bubbles are generated in the laminated molded product. Further, when the vacuum pump inside the film body and the vacuum pump in the vacuum chamber in the board having the film body are separated from each other, the degree of vacuum in the vacuum chamber rises sufficiently, but the degree of vacuum in the film chamber is higher than that in the vacuum chamber. Due to the low degree of vacuum inside, the film body may float, the laminated material may be bonded before the laminating step, and defects such as bubbles may occur in the laminated molded product.

[0004]

The inventor of the present invention, as a result of diligent research to solve the above problems, found out that the cause of the decrease in the vacuum degree was the heat insulating plate, and as a means for solving the problem, the heat insulating plate The surface was resin coated.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a vertical sectional view schematically showing a vacuum laminating apparatus for carrying out the present invention.

Reference numeral 1 denotes an upper plate, which is a substantially rectangular flat plate having a recess. An upper heat insulating plate 5, a heater 7, and an upper surface plate 10 are sequentially stacked in the concave portion of the upper plate 1 to form a plate body 20. An upper air hole 3 is bored at approximately the center of the upper plate 1, and the upper air hole 3 communicates with a groove formed in a grid pattern on the bottom surface of the concave portion of the upper plate 1,
A vacuum pump (not shown) connected to the upper air holes 3 degass the inside of the recess and the vacuum chamber 19.
Reference numeral 2 denotes a lower plate, which is a rectangular flat plate having the same dimensions as the upper plate 1. A frame-shaped frame 13 is airtightly fixed to the outer periphery of the lower plate 2, and an O-ring 14 for hermetically sealing the vacuum chamber 19 is fitted on the surface of the frame 13 facing the upper plate 1. Lower plate 2 and frame 1
In the recess formed by 3, the lower heat insulating plate 6, the heater 8,
The intermediate member 9 and the film body 12 are sequentially stacked and arranged, and together with the lower surface plate 11 placed on the film body 12 as necessary, a plate body 21 is formed. At the center of the lower plate 2, there is a lower air hole 4.
The lower heat insulating plate 6 and the heater 8 are also formed at the same positions as the lower air holes 4. Lattice-shaped grooves communicating with the lower pores 4 are provided on the bottom surface of the concave portion of the lower plate 2, and the lower pores 4 extend to the membrane body 12.
Deaeration of the inside covered with is performed by a vacuum pump (not shown), and a passage is selected to connect to pressurized air. In addition, the intermediate member 9 has a porous ventilation structure that communicates with the lower pores 4 and the lattice-shaped grooves, and the vacuum suction from the lower pores 4 and the action of the pressurized air are applied to the membrane member 1.
It is made to cover the whole area of 2.

The upper and lower heat insulating plates 5 and 6 are made of a reinforcing material such as glass fiber or aramid fiber and an inorganic binding composite material such as cement or calcium silicate. Specifically, Beth Thermo F of Nikko Kasei Co., Ltd. It is preferably used. At least the surface of the lower heat insulating plate 6 among the upper and lower heat insulating plates 5 and 6 is resin-coated by applying a one-component silicon varnish (KC-88, manufactured by Shin-Etsu Chemical Co., Ltd.) and the sealing film 22. Is formed. The sealing film 22 blocks the void inside the heat insulating plate from the outside, prevents air from being accumulated in the heat insulating plate, and prevents the degree of vacuum from decreasing. Although the sealing film 22 is exemplified by the resin-based material, it goes without saying that another material may be used as long as it can block air.

The heaters 7 and 8 as a heating device are thin plate-shaped electric resistance heating elements, and a rubber material is preferably used as an insulator. The film body 12 is required to be made of a material having excellent heat resistance, elasticity, flexibility and stretchability, and silicon rubber, special plastic or the like is preferably used. The film body 12 is assembled with the lower plate 2 in an airtight manner together with the frame 13. Upper surface plate 10
Is made of stainless steel or the like with a plate pressure of about 1 mm, has substantially the same dimensions as the heater 7, and may have a rubber film welded to its surface. The lower surface plate 11 is made of stainless steel or the like with a plate pressure of about 1 mm, and has substantially the same dimensions as the laminated material 18. The upper and lower stools 10 and 11 are used to finish the surface of the laminated material 18 smoothly, and the surface of the laminated material is uneven like a circuit board and is not smooth.
Do not use 1.

Next, the operation will be described. First, the lower plate 2 is lowered by a mold clamping device (not shown) to open the vacuum chamber 19. In FIG. 1, the lower transport film 17 and the laminated material 18 placed on the lower transport film 17 are supplied from the right side to the upper transport film 16 through the roller 15 into the vacuum chamber 19 from the right upper side. The conveyance is carried out by sandwiching the end portions of the upper and lower conveyance films laminated with the laminated material 18 on the left side of FIG. When the laminated material 18 reaches and is positioned at a position where it is entirely overlapped with the lower surface plate 11, the conveyance is stopped. Then, the lower plate 2 is raised and the lower plate 2 is inserted through the frame 13.
Then, the upper plate 1 is clamped by a mold clamping device (not shown) to form a vacuum chamber 19.

Before and after the lower plate 2 is raised, the film body 12 is brought into close contact with the intermediate member 9 by vacuum suction from the lower air holes 4. At this time, since the sealing film 22 is present on the surface of the lower heat insulating plate 6, air is not accumulated inside the lower heat insulating plate 6 and is sufficiently vacuumed within a predetermined time to reduce the degree of vacuum inside the film body 12. Prevent it. When the lower plate 2 and the upper plate 1 are clamped and the vacuum chamber 19 is formed, vacuum suction is also performed from the upper pores 3. Also in this case, since the sealing film 22 is provided on the surfaces of the lower heat insulating plate 6 and the upper heat insulating plate 5, the degree of vacuum in the vacuum chamber 19 rises to a predetermined value within a predetermined time. After that, the lower pores 4 are switched from the vacuum source to the atmosphere or, if necessary, to the pressurized air source, and the film body 1 is connected.
2 is expanded to heat and press the laminated material 18. Laminated material 1
After the molding of 8 is completed, the lower plate 2 is lowered again to open the vacuum chamber 19, and the upper and lower transport films are transported together with the laminated material 18.

As is clear from the above operation, the lower heat insulating plate 6
Since the vacuum, the atmosphere, and the pressurized atmosphere are repeated, the amount of accumulated air is larger when the sealing film 22 is not provided than in the upper heat insulating plate 5 where the vacuum and the atmospheric atmosphere are repeated. is there. This means that the lower the degree of vacuum of the lower pores 4 of the vacuum laminating apparatus that employs the conventional lower heat insulating plate 6 without resin coating, the larger the pressurized air pressure of the film body 12,
It can be understood from the lowering. Therefore, the sealing film 22 may be formed only on the lower heat insulating plate 6.

[0012]

EXAMPLE An example of the present invention will be shown according to molding conditions and vacuum degree. The vacuum lamination device tested has a vacuum chamber size of 51
It is 0 × 600 × 5 mm, and the heat insulating plate was resin-coated with KC-88 manufactured by Shin-Etsu Chemical Co., Ltd. and sealed. The molding conditions are
Heating temperature 100 ℃, vacuum suction time 30 seconds, pressurization time 30
The data when the upper pores 3 and the lower pores 4 are connected to one vacuum pump and sucked are shown below. Applied pressure (Mpa) Conventional vacuum degree (Torr) Vacuum degree (Torr) of the present invention such as 0.1 1.9 1.3 0.5 0.5 2.5 1.5 1.0 1.0 3.1 1.7 As a result, a very remarkable effect was obtained.

[0013]

The resin coating of the heat insulating plate improves the degree of vacuum inside the film body and the vacuum chamber, and can reduce molding defects such as bubbles in the laminated molded product, which greatly contributes to the improvement of the efficiency of the laminated molding work. To do.

[Brief description of drawings]

FIG. 1 is a vertical sectional view schematically showing a vacuum laminating apparatus for carrying out the present invention.

[Explanation of symbols]

1 ……… Upper plate 2 ……… Lower plate 3 ……… Stomach 4 ……… Lower pore 5 ………… Upper heat insulating plate 6 ……… Lower heat insulating plate 7, 8 Heater 9 ………… Intermediate member 10 ... Upper surface plate 11 …… Lower surface plate 12 ... Membrane 13 …… Frame 14 …… O-ring 15 …… Laura 16 …… Top transport film 17 …… Lower carrier film 18 ... Laminated material 19 …… Vacuum chamber 20, 21 …… Board 22 ... Sealing film

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B29C 43/00-43/58 B30B 1/00-15/34 B32B 1/00-35/00 F16L 59 / 00-59/22 B29C 63/00-65/82

Claims (2)

(57) [Claims] 1. A vacuum chamber is formed by pressing one plate body provided with a heating device and a heat insulating plate and the other plate body provided with a frame, a film body, a heating device and a heat insulating plate to form a laminated material. A vacuum laminating apparatus that press-molds a film under vacuum at a predetermined temperature, wherein a sealing film that blocks a void inside the heat insulating plate from the outside is formed on the surface of the heat insulating plate. 2. The vacuum laminating apparatus according to claim 1, wherein the sealing film is formed only on the heat insulating plate of the board having the film body.