JPH0673913B2 - Method and device for attaching sheet by vacuum press - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention attaches a surface decorative sheet such as a vinyl chloride sheet, a veneer decorative sheet, or a surface coated paper to an air permeable base material such as wood and ceramics, metal, etc. The present invention relates to a method and a device for attaching a sheet by a vacuum press used for.

[0002]

2. Description of the Related Art A conventional pressure type vacuum press device has a vacuum suction table which is provided with a large number of suction holes at predetermined intervals on its surface and can be moved up and down by a hydraulic cylinder. It comprises a heater for heating, a lower part is covered with a rubber-like sheet, the inside is hermetically sealed, and a cover box connected by an air compressor. Then, the method of using the pressure type vacuum press device is that a base material such as plywood is placed on a vacuum suction table, and an adhesive sheet made of a surface decorative sheet coated with an adhesive (adhesive is applied to the base material. (In some cases), the vacuum cylinder is pushed up by the lower hydraulic cylinder to bring it into close contact with the upper cover box. Next, when compressed air is sent from the air copressor to the upper cover box, and at the same time decompressed with the lower vacuum suction table, the rubber-like sheet covers the entire surface of the vacuum suction table,
The suction holes are sealed except where the base material and the sheet are placed.
Then, since the air between the base material and the surface decorative sheet is sucked to form a vacuum, the base material and the surface decorative sheet are brought into close contact with each other and bonded. At this time, even if the surface of the base material has irregularities, the surface decorative sheet can be made to conform to the entire surface of the base material by the vacuum pressure in the lower part and the pressurized air in the upper part.

[0003]

However, in the conventional apparatus and method, since the rubber-like sheet for molding is used, the product may become dirty due to the adhesive attached to the rubber-like sheet or the scratches on the rubber-like sheet. There was a problem that it was scratched. Also, since the thickness of the rubber-like sheet is limited, there is a limit to the conformability of the irregularities on the surface of the base material, and if the irregularities are provided on the base material, the rubber-like sheet will be damaged,
There was a limit to the design. Furthermore, since the surface decorative material is heated via the rubber-like sheet, there is a problem that it takes time to mold. The present invention has been made in view of such circumstances, and press marks, scratches,
It is an object of the present invention to provide a sheet sticking method by a vacuum press and an apparatus for the sheet, which are less likely to be soiled and can follow irregularities on the surface of a base material to the limit of a surface decorative sheet.

[0004]

According to the first aspect of the present invention, there is provided a method for adhering a sheet by a vacuum press according to the first aspect, wherein a plurality of suction holes connected to a vacuum pump and each of which has a normally closed valve mechanism are provided. The base material is placed on the provided flat vacuum suction table, the valve mechanism of the suction hole of the portion where the base material is placed is opened, and the sticking sheet is covered so as to cover the entire base material, The whole is covered with a cover body having a heating source inside, the inside of the adhesive sheet is depressurized while heating the adhesive sheet and applying compressed air from the outside, and the adhesive sheet is applied to the surface of the base material. It is configured to be attached to. According to the second aspect of the present invention, in accordance with the second object, the vacuum pressing device has a flat upper portion and a vacuum suction table provided with a large number of suction holes, and the upper portion of the vacuum suction table is openably and closably covered. In a vacuum press device comprising a cover body and a heating source for heating a sheet covering a base material placed on the vacuum suction table, in each of the suction holes, a mounting portion of the base material is provided. A valve mechanism that can be opened and closed correspondingly is provided. The vacuum pressing apparatus according to claim 3 is the vacuum pressing apparatus according to claim 2, wherein compressed air is provided inside the cover body while the periphery of the cover body is in close contact with a vacuum suction table. Can be filled.

[0005]

According to the first aspect of the present invention, there is provided a method for attaching a sheet by a vacuum press, wherein the base material is placed on a flat vacuum suction table provided with a large number of suction holes each having a normally closed valve mechanism. , Covering the whole base material with an adhesive sheet, covering the whole with a cover body having a heat source inside, heating the adhesive sheet and pressurizing it with compressed air from the outside,
Since the pressure inside the adhesive sheet is reduced, the adhesive sheet expands and contracts according to the irregularities of the base material, is pressed by compressed air from the outside, and is pulled by depressurized air from the inside.
Can be adhered to the substrate in close contact. Further, since a valve mechanism that is normally closed is provided in each of the many suction holes, the suction force does not work in a place other than the portion on which the base material is placed, and the compressed air inside does not leak. As described above, work can be performed without using a rubber sheet. The vacuum press machine apparatus according to claim 2, wherein a vacuum suction table having a flat upper portion and provided with a large number of suction holes, a cover body for opening and closing the upper portion of the vacuum suction table, and the vacuum It has a heating source for heating the sheet covering the base material placed on the suction table, and since each suction hole is provided with a valve mechanism, the base material is placed on the vacuum suction table. Put an adhesive sheet on top,
The valve of the suction hole corresponding to the contact portion of the base material is opened, the other valve mechanism is closed, and at least the upper surface of the vacuum suction table is entirely covered by the upper cover body to operate the vacuum and the heating source. Then, the adhesive sheet that has been heated and softened is sucked into the base material by vacuum, whereby the surface of the base material can be coated without difficulty. Particularly, in the vacuum press device according to the third aspect, compressed air can be filled into the inside of the cover body, so that the adhesive sheet placed on the base material can be further strengthened by the base material. Can be adhered to.

[0006]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. As shown in FIGS. 1 to 3, a vacuum press apparatus 10 according to an embodiment of the present invention includes a vacuum suction table 12 arranged on a hydraulic cylinder 11 arranged at the center, and the vacuum suction table 1
It is configured to have a cover body 13 arranged on the upper part of the second body 2 and a base 14 for supporting them. These will be described in detail below.

As shown in FIG. 2, the vacuum suction table 12 has a large number of suction holes 15 in its upper part, a space inside thereof, and a large number of reinforcing ribs 16 and a connection port of a vacuum pump in its lower part. 17 are provided. The suction hole 15 has a hemispherical upper portion as shown in FIG.
8 is arranged, and the push-up rod 1 is at the bottom.
9 and a lever 20 for lifting the push-up rod 19.
And a push-down rod 22 for pressing the lever 20 according to the weight of the base material 21 on the upper side is provided. As shown in FIG. 3B, the base material 21 is sensed and the upper ball 18 is pushed up,
The suction hole 15 can be opened. Further, when the base material 21 is not provided on the upper portion, the suction holes 15 are closed by the balls 18 as shown in FIG. The ball 18, push-up rod 19, lever 20 and push-down rod 22 make the valve mechanism 23
Are formed.

The cover body 13 is composed of an iron box body having sufficient strength and is connected to the base 14 by support members 24 and 25, and the periphery has the same size as the outer shape of the vacuum suction table 12. Moreover, the inside and outside of the vacuum suction table 12 are engaged with the sealing member 26 made of rubber or the like to seal the inside and outside. The sealing member 26 can be provided around the lower portion of the cover body 13. A heater 27 for heating is provided inside the cover body 13, and an adhesive sheet 28 into which the inside can be put
Can be heated to around 70 to 120 ° C., and a high pressure air inlet 29 is provided so that compressed air can be introduced from an air compressor (not shown).

Therefore, when the vacuum press apparatus 10 is used, a predetermined vacuum pump is connected to the connection port 17 and an air compressor is connected to the compressed air introduction port 29, and a predetermined vacuum suction table 12 is provided. A base material 21 made of plywood or the like processed into a shape is placed, and an adhesive sheet 28 that is sufficiently larger than the plane area of the base material 21 is placed on the base material 21, and the hydraulic cylinder 11
Is driven to completely cover the vacuum suction table 12 with the upper cover body 13. In this state, the valve mechanism on which the base material 21 is mounted is completely opened as shown in FIG. 3 (B) and the other parts are closed, so that the vacuum pump is operated and the cover body 13 of the cover body 13 is operated by the air compressor. When air is introduced into the inside, the adhesive sheet 28 is adsorbed to the base material 21. By further heating the adhesive sheet 28 with the heater 27, the flexibility is increased, and therefore the adhesive sheet 28 can be adhered to the surface of the base material 21 while sufficiently corresponding to the uneven portion.

Next, a modification of the valve mechanism used in the present invention shown in FIGS. 4 to 8 will be described. In the valve mechanism 30 according to the first modification shown in FIG. 4, a valve is used instead of the ball. A plate 31 is used, and the push-up rod 32, the lever 33, and the push-down rod 34 detect the base material 21 as shown in FIG. In the valve mechanism 35 according to the second modification shown in FIG. 5, a spherical space portion 37 is provided inside the suction hole 36, a ball 38 made of a magnetic material is arranged inside the lower portion of the base material 21. A magnetic sheet 39 having air permeability is disposed on the above, and the above-mentioned balls are sucked by the magnetic sheet, the suction holes 36 are opened, and the upper portion is evacuated. The vacuum suction table 40 is divided into two at the center position of the spherical space portion 37.

FIG. 6 shows a valve mechanism 41 according to a third modification.
The electromagnetic valve (not shown) is provided in each suction hole 42, and the electromagnetic valve is a computer 43.
Is controlled by. Therefore, the size of the substrate in advance,
The installation position is input to the computer 43, and the valve mechanism 41 is opened and closed by opening only the electromagnetic valve at the corresponding position and closing the other parts.

FIG. 7 shows a valve mechanism 44 according to a fourth modification, but as shown in the drawing, the rod 4 protruding upwards.
5 is provided, and a piston 46 is provided at an intermediate portion of the rod 45.
However, a spring 47 is provided at the bottom. And
As shown in (A), in a natural state, the piston 47 is pushed up by the spring 47, so that the lateral suction holes 4 are formed.
8 is closed, but as shown in (B), the base 2
When 1 is mounted, the piston 46 is lowered, the side suction lateral hole 48 is opened, and the suction hole 49 is opened.

FIG. 8 shows a valve mechanism 5 according to a fifth modification.
0 is shown, but as shown in the figure, a valve chamber 52 is provided inside the vacuum suction table 51, a valve plate 53 made of resin or rubber having some elasticity is provided inside, and the valve plate 53 is in a natural state. Then, it is opened as shown by arrow a and closed as shown by arrow b when a large amount of air flows. As a result, when the substrate 21 is placed on the vacuum suction table 51, a small amount of air flows, but the valve plate 53 cannot be pushed down, so the valve plate 53 is in an open state. When 21 is not on the upper side, a large amount of air flows and is pushed by this to close the valve plate 53, and as a result, the valve mechanism 50 is closed at that portion.

9 to 11 show another method of using the above vacuum press apparatus 10. As shown in the figures, a frame 56 having suction holes 55 is provided around a base material 54, and the frame 56 is provided. The adhesive sheet 57 is put on the top so that work can be performed.
The lower portion of the frame 56 has a larger diameter and communicates with any of the lower suction holes 15. As a result, even if the base material 54 has a depression at the bottom, the adhesive sheet 57 can be applied very reliably. In the above, the sticking sheet usually refers to a vinyl chloride sheet, but it may be a decorative sheet with a sheet, a surface coated paper, or other synthetic resin sheet. Further, the adhesive sheet may be coated with an adhesive in advance, or the surface of the base material may be coated with an adhesive in advance. The valve mechanism includes one that manually opens and closes the suction holes, for example, one that has a large number of suction holes and a rubber or cork stopper for the suction holes that are closed.

[0015]

As is apparent from the above description, the method and apparatus for attaching a sheet by the vacuum press according to the first to third aspects have a valve mechanism in each suction hole. The valve mechanism can be opened according to the base material, which eliminates the need for the rubber sheet used in the past. Therefore, the press marks, scratches, stains and the like due to the use of the rubber-like sheet are eliminated, and furthermore, the unevenness of the substrate surface can be followed up to the limit of the surface decorative sheet to be stuck. Therefore, the degree of freedom in design can be further expanded. In addition, since the surface decorative sheet is heated directly, the molding time can be shortened.

[Brief description of drawings]

FIG. 1 is a front view of a vacuum press device according to an embodiment of the present invention.

FIG. 2 is a plan view of a vacuum suction table.

3A and 3B are views showing a valve mechanism of the vacuum press device, FIG. 3A is a sectional view showing a closed state, and FIG. 3B is a sectional view showing an open state.

4A and 4B are views showing a valve mechanism according to a first modification, wherein FIG. 4A is a sectional view showing a closed state, and FIG. 4B is a sectional view showing an open state.

FIG. 5 is a sectional view of a valve mechanism according to a second modification. .

FIG. 6 is a schematic configuration diagram of a valve mechanism according to a third modification.

7A and 7B are diagrams showing a valve mechanism according to a fourth modification, wherein FIG. 7A is a sectional view showing a closed state, and FIG. 7B is a sectional view showing an opened state.

FIG. 8 is a sectional view of a valve mechanism according to a fifth modification.

FIG. 9 is a cross-sectional view showing another example of use of the vacuum pressing apparatus according to the above embodiment.

FIG. 10 is a plan view of the same.

11A and 11B are drawings showing a frame used in the above-described use example, in which FIG. 11A is a plan view and FIG. 11B is a sectional view.

[Explanation of symbols]

 10 Vacuum Press Device 11 Hydraulic Cylinder 12 Vacuum Suction Table 13 Cover 14 Base 15 Suction Hole 16 Reinforcing Rib 17 Connection Port 18 Ball 19 Push-up Rod 20 Lever 21 Base Material 22 Push Down Rod 23 Valve Mechanism 24 Support Member 25 Support Member 26 Seal Member 27 Heater 28 Adhesive sheet 29 Compressed air inlet 30 Valve mechanism 31 Valve plate 32 Push-up rod 33 Lever 34 Push-down rod 35 Valve mechanism 36 Suction hole 37 Spherical space 38 Ball 39 Magnetic sheet 40 Vacuum suction table 41 Valve mechanism 42 Suction Hole 43 Computer 44 Valve mechanism 45 Rod 46 Piston 47 Spring 48 Suction lateral hole 49 Suction hole 50 Valve mechanism 51 Vacuum suction base 52 Valve chamber 53 Valve plate 54 Base material 55 Suction hole 56 Frame 57 Adhesive sheet

Claims (3)

[Claims] 1. A base material is placed on a flat vacuum suction table which is connected to a vacuum pump and provided with a large number of suction holes each having a normally closed valve mechanism. Open the valve mechanism of the suction hole of the part that is covered, cover the adhesive sheet so as to cover the entire base material, cover the whole with a cover body having a heating source inside, heat the adhesive sheet and apply compressed air from the outside. A method for sticking a sheet by a vacuum press, comprising depressurizing the inside of the sticking sheet while applying pressure to stick the sticking sheet to the surface of the base material. 2. A vacuum suction table having a flat upper surface and a large number of suction holes, a cover body for opening and closing the upper part of the vacuum suction table, and a vacuum suction table mounted on the vacuum suction table. In a vacuum press device having a heating source for heating a sheet covering a base material, each of the suction holes is provided with a valve mechanism capable of opening and closing corresponding to a mounting portion of the base material. And vacuum press equipment. 3. The vacuum pressing apparatus according to claim 2, wherein compressed air can be filled inside the cover body while the periphery of the cover body is in close contact with the vacuum suction table.