JPS62179902A - Manufacture of board material, on surface thereof thrust board is stuck - 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] A. Industrial Field of Application The present invention relates to a method for manufacturing a board material such as a plywood board, in which the surface is treated by adhering thinly sliced wood veneers to the surface thereof. In particular, the present invention relates to a method of manufacturing a plate material in which a plurality of veneers are connected and bonded without gaps.

B. Prior art and its problems FIGS. 4 and 5 show a conventional veneer bonding method. In this method, a board material 1 such as a plywood board is placed horizontally, an adhesive 2 is evenly applied thereon, and a plurality of veneers 3 are arranged without gaps. When arranging the veneer 3 on top of the board 1, if the position of the veneer 3 shifts and a gap is created between it and the adjacent veneer, it will be necessary to remove it and reapply it due to the adhesive properties of the adhesive.
There was a drawback that it took considerable time and effort to correct the veneer 3. or,
A plate l with a veneer 3 adhered to the surface using adhesive 2 is sent between the hot platens 4 of a multi-stage hot press to heat press and harden the adhesive. The veneer 3 tends to be misaligned, and the yield rate of the product is poor.

In addition, since it takes time to arrange the plate l with the veneer 3 attached to the surface between the hot plates of the hot press, the adhesive begins to harden before the pressure is applied, and the veneer 3 completely adheres to the surface of the plate 1. There was also the drawback that it could not be bonded firmly.

The present invention was developed with the aim of eliminating these conventional drawbacks, and an important objective of the present invention is to easily and easily arrange the veneers without any gaps, and to To provide a method for manufacturing a plate material having a veneer stuck to the surface which can be neatly adhered to the surface.

C0 Means for Solving Conventional Problems The method of manufacturing a board material with a veneer stuck to the surface of the present invention is to place a veneer made of thinly sliced wood on a flat suction board so that the cut ends are mutually aligned. It consists of a process of arranging a plurality of sheets so that they are in contact with each other without any gaps, and a process of adhering them to the surfaces of the veneer plates that are lined up without any gaps.

The suction plate on which the veneers are lined up sucks air through the air hole provided through it, and uses air pressure to adsorb it to the surface of the veneer. , and press the plate material onto the surface of the veneer to adhere it.

00 Functions and Effects The operational steps of the manufacturing method of the present invention will be explained based on FIGS. 1 to 3 showing the most preferred embodiment of the present invention.

First, as shown in FIG. 1, the veneers 3 are continuously arranged without gaps on a suction plate 5 made of a conveyor belt that attracts the veneers 3. At this time, the projecting plate 3 is moved by the suction plate 5 due to the suction force of the air.
It is adsorbed to the top surface of. That is, the air is sucked onto the suction plate 5 due to the pressure difference of the air sucked into the vacuum chamber 6 below the suction plate 5 through the air hole of the suction plate 5 .

The suction force for adsorbing the veneer 3 to the suction plate 5 is determined such that the veneer 3 can be moved laterally by hand, but will not move when lightly touched by hand. This veneer adsorption force can be freely adjusted by adjusting the degree of vacuum in the vacuum chamber 6.

A plurality of projecting plates 3 are arranged in a continuous belt shape on a suction plate 5 in close contact with each other without gaps.

The veneer plates 3 arranged on the suction plate 5 are carried to the next veneer suction zone 7 by the suction plate 5 made of a conveyor belt. Veneer suction zone 7, board material 1 is on top ■;
53n μ5J7 snoring end o1 h i↓ka91 large ruru. At this time, adhesive is applied to the lower surface of the plate l in advance.

As shown in FIG. 3, when the plate 1 is pressed against the upper surface of the veneer 3 by the cold press 8, the veneer 3 is brought into close contact with the lower surface of the plate 1. The veneer 3 that has been brought into close contact with the surface of the board in this state is pressed into a flat shape and is in close contact with the surface of the board, compared to the conventional method in which veneers are arranged on top of the board. Therefore, it is possible to minimize the displacement of the veneer during the subsequent process of conveying it to a hot press.

In particular, as shown in FIG. 2, when the suction plates 5 made of a conveyor belt are carried into the hot press 9 and the adhesive is cured one by one in the hot press 9, there is almost no displacement of the veneer 3. can.

Therefore, the present invention has the advantage that the veneers can be easily lined up without gaps, and that the veneers can be brought into close contact with the surface of the plate materials while being lined up. In particular, the adsorption force of the veneers is not something that cannot be adjusted like with conventional adhesives, but can be easily controlled using air pressure. This will strongly adsorb it to prevent it from shifting. Therefore, it is possible to realize contradictory features that could not be achieved with conventional methods, such as making it easier to line up the veneers and preventing them from shifting.

E. PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to FIGS. 1 to 3.

In the present invention, instead of arranging the conventional veneer plates directly on the surface of the plate material, they are once arranged on the suction plate 5 without any gaps.

The suction plate 5 suctions the projecting plate 3 using air pressure.

The suction plate 6 in FIG. 1 is a conveyor belt that suctions the projecting plates 3 arranged above and conveys them to the next process.

The adsorption plate 5 that adsorbs the projecting plate 3 is provided with a large number of air holes 10 passing through it, and these air holes 10 communicate with the vacuum chamber 6 below. The vacuum chamber 6 is connected to a fan 11, is evacuated by the fan 11, and is maintained below atmospheric pressure.

The device shown in FIG. 1 changes the veneer suction force of the suction plate 5 between a veneer correction zone 12 where the veneers are lined up without gaps, and a veneer suction zone 7 where the lined up veneers 3 are sent next and bonded to the plate material 1. There is. That is, the veneer repair zone 12 is adjusted to the optimum adsorption force for repairing the veneer 3, and the veneer adsorption zone 7 is adjusted to
The veneers 3 are strongly attracted to each other so that the veneers 3 arranged side by side do not shift in position.

If the force for correcting the veneer 3 in the veneer correction zone is too strong, the veneer 3 will not move and its position cannot be corrected, and if it is too weak, it will move too much and correction will be difficult.

Therefore, it is preferable that the entire veneer 3 can be moved when the top of the veneer 3 is pushed by hand, but not moved by a light touch.

The suction force of the projecting plate 3 can be controlled by the air pressure in the vacuum chamber 6. Therefore, it is preferable to detect the pressure in the vacuum chamber 6 with a sensor and control the rotation speed of the fan 11 using the sensor so that the pressure in the vacuum chamber 6 is always constant.

As shown in Figure 1, the veneer correction zone 1 where the veneers 3 are arranged
2 and the veneer suction zone 7 for transferring the veneer 3, it would be convenient to line up the veneer, and the veneer 3 would be more convenient to line up.
It is possible to realize the feature of extremely reducing positional deviation. However, even if the veneers are attracted with the same suction force in the process of arranging the veneers 3 and the process of adhering the plate material 1 thereto after arranging them, displacement of the veneers 3 can be sufficiently prevented.

When the suction plate 5 is a conveyor belt, the veneers 3 are arranged in succession, so that the loss of the veneers 3 can be significantly reduced. This is because in the conventional method shown in Fig. 4, a veneer 3, which is somewhat larger than the veneer 1, is cut to a fixed size on top of each veneer 1, and the veneer 3 is lined up and bonded using a hot press 9. is quite large, and the veneer 3
The disadvantage was that there was a lot of waste.

However, as shown in Fig. 1, the veneer 3 is placed in a continuous manner with gaps between the suction plates 5 made of a continuous conveyor belt, and the plate material 1 is glued on top of this without any gaps, as shown in Fig. 3. This method can significantly improve the yield of the veneer 3.

The suction plate 5, which is a conveyor belt, has an upper and a lower suction plate 5 shown in FIG. Provide a seedling repellent zone 11-13 where the veneer 3 is easily leveled, and move to the next veneer correction zone 12.
They are adsorbed by arranging them side by side so that there are no gaps and the edges do not overlap.

On the suction plate 5, on top of the veneer plates 3 which are lined up without any gaps or overlaps, the plate material 1 whose lower surface is coated with adhesive is placed, and in this state it is transported to the cold breather 8, where it is applied to a cold breather for low compression. 8 and pressurize to slightly compress the veneer 3 into the plate material 1.

Since the veneer 3 in the veneer adsorption zone 7 is adsorbed by the adsorption plate 5 and is prevented from being displaced, the veneer 3 will not be displaced when the plate material 1 coated with adhesive is placed thereon.

The plate material 1 may be fed onto the upper surface of the projecting plate 3 by either a feeding device or by hand.

The method of applying the adhesive to the lower surface of the plate material 1 can simplify the adhesive application process. However, it is also possible to apply adhesive to the upper surfaces of the juxtaposed veneers 3, place the plate material 1 on top, and apply pressure. In this case, adhesive is applied to the upper surface of the veneers before or after arranging the veneers 3. As shown in FIG. 2, the plate material 1 to which the veneer 3 has been temporarily pressed by the cold press 8 is conveyed by an insertion conveyor 14 to a continuous hot press 9 equipped with a conveyor, and is bonded by applying pressure and heating in the hot press 9. The agent is cured to completely adhere the veneer 3 to the board 1.

Although not shown in the figure, if the plates are not bonded continuously, the veneer is placed on the suction plate, which is a flat metal plate, in an adsorbed state without any gaps or overlaps, and then the planks are placed on top while maintaining the adsorbed state. It is also possible to temporarily press the veneer by placing the veneer on the plate and pressurizing it with a cold press.

In this state, the veneer is temporarily pressed onto the plate, and the veneer does not shift in position, and the veneer can be transferred to a conventional multi-stage hot press, pressurized and heated to completely cure the adhesive, and then bond the veneer.

[Brief explanation of drawings]

FIGS. 1 to 3 are schematic side views and sectional views of essential parts showing embodiments of the present invention, and FIGS. 4 and 5 are schematic side views showing an example of a conventional manufacturing method. 1. Board material, 2. Adhesive, 3. Veneer,
4. Heat plate, 5. Suction plate, 6. Vacuum chamber, 7. Veneer suction zone, 8. Cold press, 9. Hot press, 10. Air hole, 11. Medium fan, 12. - Veneer correction zone, 13... Veneer adsorption zone, 14... Insertion conveyor,

Claims (6)

[Claims] (1) The process of arranging a plurality of thinly sliced wood veneers on a flat suction board with the cut ends touching each other without any gaps, and gluing the veneers lined up without any gaps to the surface of the board. A suction plate on which the veneers are lined up sucks air through air holes provided through it, and the veneers are adsorbed to the surface using air pressure. A method for manufacturing a plate material having a veneer attached to a surface thereof, the method comprising: thereafter holding the veneer in an adsorbed state and pressing and bonding the plate material to the surface of the veneer. (2) The method for producing a plate material having a veneer stuck to its surface as set forth in claim (1), wherein the suction plate is a conveyor belt, and the veneer is arranged on the conveyor belt. (3) The conveyor belt has a veneer correction zone where the veneers are arranged and a veneer adsorption zone, and the veneer adsorption force in the veneer correction zone is adjusted to be weaker than the veneer adsorption force in the veneer adsorption zone. 2) A method for producing a plate material having a veneer attached to its surface as described in item 2). (4) A vacuum chamber is provided below the conveyor belt, and outside air is sucked into this vacuum chamber through the air holes of the conveyor belt.
As a result, the veneer is adsorbed to the surface.
1) A method for producing a plate material having a veneer attached to its surface as described in item 1). (5) Claim No. 1 in which a plate material coated with an adhesive on the lower surface is pressed and bonded onto the veneer panels arranged without any gaps.
) A method for manufacturing a plate material with a veneer attached to the surface as described in item 2. (6) A method for producing a plate material with a veneer stuck to its surface as set forth in claim (1), which comprises applying an adhesive to the upper surface of the arranged veneer plates, and pressing and bonding the plate material onto the veneer plate. .