JPH0673844B2 - How to glue the sheet material to both sides of the board - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a method of stretching a sheet material, which is welded when heated, on the surface of a board such as plywood.

[Prior art]

A method of pasting resin-impregnated sheet material on both sides of a board has already been developed. In this method, the sheet material is attached to both sides of the board as follows. Place the sheet material that will be bonded when heated on the board. The board on which the sheet material is placed is carried into a hot press, heated and pressed to bond the sheet material to the board. Take the board out of the hot press and turn it upside down so that the surface with the sheet material is the bottom surface. Place the sheet material on the top of the board. The board is again loaded into the hot press, and the sheet material on the upper surface is bonded to the board. In this way, the sheet material is adhered to the upper and lower surfaces of the board. The board on which the sheet material is placed is heated with a hot press,
When pressed, the resin impregnated in the sheet material is melted and the sheet material is welded to the surface of the board. At this time, if a mirror plate is used as the hot plate of the hot press, the surface of the sheet material can be finished in a beautiful gloss color. The surface of the sheet material can be embossed or dulled depending on the surface shape of the mirror plate. In this way, when the sheet material is attached to the surface of the board, it is necessary to align the sheet material with the upper surface of the board. To fit the sheet material to the board, cut the sheet material to the size of the board, place it on a board placed on a flat plate, and temporarily fix it. Further, it is also possible to carry the board with the sheet material along both sides of the board. In this case, it is necessary to accurately position and stack the sheet material, the board, and the sheet material on the mirror plate, and press and heat this with a hot press.

[Problems to be Solved by the Invention]

As described above, according to the conventional method, since the sheet material is placed on the fixed position of the board by hand, it is difficult to accurately position the sheet material and the board, and the processing steps are complicated, which makes the processing time-consuming. It has a drawback that it is difficult to automate. The present invention was developed with the object of solving these drawbacks of the prior art, and an important object of the present invention is to easily and easily and efficiently align a sheet material with a fixed position on a board. It is possible to provide a method of adhering a sheet material to both sides of a board.

[Means for solving the problem]

The method of adhering the sheet material to both sides of the board of the present invention is
In order to achieve the above object, the sheet material is adhered to the board in the following steps. (A) A step of supplying the sheet material 3 that hangs the sheet material 3 on the supply side surfaces of the guide rolls 1 that are vertically opposed to each other, equal to or longer than the entire length of the board 2, and (b) sheet material. 3 is a side surface of the guide roll 1 that is hung, and the board 2 is loaded between the upper and lower guide rolls 1. When the board 2 is loaded, the sheet material 3 is sent out, and the sheet material 3 is sent out. And (c) pressing the board 2 having the sheet material 3 on both sides with a hot press to bring the sheet material 3 that has been hung down on the upper surface of the sheet material 3 into the sheet material 3 Of adhering to the surface of the board 2.

[Operation effect]

An outline of a method of adhering a sheet material to both surfaces of the board of the present invention will be described with reference to FIGS. As shown in FIG. 1, the sheet material 3 is hung down. The sheet material 3 carries the board 2 between the guide rolls 1 and extends along the lower surface of the board 2. Therefore, the length of the hanging sheet material 3 is equal to or longer than the length of the board 2. The sheet material 3 is fed to the guide rolls 1 positioned above and below, so that the sheet material 3 can be placed along the upper and lower sides of the board 2. (To the right of 1). As shown in FIG. 2, a board 2 is provided between the guide rolls 1.
Bring in. In this state, the suspended sheet material 3 is placed along the lower surface of the board 2. By loading the board 2 between the guide rolls 1, the sheet material 3 is supplied while the board 2 is loaded so that the sheet material 3 can be placed along the upper surface of the board 2. The supply amount of the sheet material 3 is adjusted to the carry-in amount of the board 2. The board 2 having the sheet materials 3 on both sides is carried into a hot press, and is pressed and heated by the hot press, so that the sheet material 3 is brought into close contact with the surface of the board 2. In this way, the method of adhering the sheet material to both sides of the board of the present invention is simple and easy, and moreover, the sheet material is made to follow the upper and lower surfaces at the same time so that the sheet material can be efficiently aligned with the fixed position of the board. You can

【Example】

Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below exemplify a method of adhering a sheet material to both surfaces of a board for embodying the technical idea of the present invention. The shape, structure, and arrangement of are not limited to the following structures. The method of the present invention is subject to various modifications within the scope of the claims. Further, in this specification, for easier understanding of the claims, the numbers corresponding to the members shown in the embodiments are added to the members shown in the claims. However, the members described in the claims are not limited to the members shown in the embodiments. The method of the present invention uses the apparatus shown in FIG.
The board 2 having the sheet material 3 along both sides of the board 2 and the sheet material 3 along both sides in the process shown in FIGS.
Is brought into a hot press to bring the sheet material 3 into close contact with the surface of the board 2. Board 2 with sheet material 3 on both sides
As a hot press for heating and pressurizing both surfaces of the above, a conventional one can be used as it is. The method of the present invention is characterized by the step of causing the sheet material to extend along both sides of the board. Therefore, a detailed example of a method of adhering the sheet material to both surfaces of the board will be described in detail below based on a device that causes the sheet material to follow the surface of the board. Absent. An apparatus for adhering a sheet material to both surfaces of a board shown in FIG. 4 is a sheet material supply means 4, a guide roll 1, a board loading means 5, a board discharge means 6, and a sheet material 3 cutting. -Provided with temporary fixing means 7. The feeding means 4 for the sheet material 3 includes a rewinding member 9 disposed above and configured to set a film roll 8 on which the sheet material 3 having a predetermined length is wound, a feed roll 10 for transporting the sheet material 3 with the sheet material 3 interposed therebetween. It comprises a clamp roll 11 and a sheet material receiving conveyor 12. The rewinding member 9 keeps the tension of the sheet material 3 constant in order to accurately feed the sheet material 3. For this reason,
The rewinding member 9 is provided with means for applying a constant brake to the film roll 8. Further, the rewinding member 9 includes a mechanism that corrects the lateral displacement of the sheet material 3 delivered from the film roll 8. To achieve this,
The rewinding member 9 includes a mechanism that detects the lateral position of the sheet material 3 and laterally moves the film roll 8. The feed roll 10 and the clamp roll 11 are the sheet materials 3
Are transported so that they can be transported without slipping.
An encoder 13 that detects the amount of movement of the sheet material 3 is connected to the rotary shaft of the feed roll 10. The encoder 13 and the feed roll 10 rotate together. Therefore,
When the feed roll 10 rotates and sends out the sheet material 3,
The encoder 13 is also rotated to measure the feed amount of the sheet material 3. The feed roll 10 rotates forward to feed out the sheet material 3, and reversely rotates to rewind the sheet material 3. The clamp roll 11 is arranged right above the guide roll 1 so that the sheet material 3 sent out from the clamp roll 11 hangs down toward the supply side of the guide roll 1. The receiving conveyor 12 carries and transfers the sheet material 3 supplied to the supply side of the guide roll 1, and is arranged below the guide roll 1. The receiving conveyor 12 places the sheet material 3 delivered from the feed roll 10 thereon and transfers it. The moving speed of the receiving conveyor 12 is adjusted to the supply amount of the sheet material 3. This is because the sheet material 3 is placed without wrinkling. The guide rolls 1 are vertically separated from each other so that the guide rolls 1 can be transported while sandwiching the board 2. The gap of the guide roll 1 is adjusted so that the board 2 having the sheet materials 3 on both sides can be carried in. Further, as the guide roll 1, a roll whose surface is hard chrome plated is used so that the sheet material 3 can be lightly pressed against the surface of the board 2 by the surface. The gap between the upper and lower guide rolls 1 is adjusted to be approximately equal to the thickness of the board 2 or slightly narrower than this. The guide roll 1 shown in FIG. 4 is the upper guide roll 1.
Has a structure that can be moved up and down. The upper guide roll 1 is supported on the upper and lower bases 14. The upper and lower bases 14 move vertically along the guides 15. A lower end of a screw rod 16 is connected to the upper and lower bases 14. Screw rod 16 is frame 17
The nut member 18 is screwed into the protruding portion of the frame 17. The guide roll 1 having this structure can adjust the vertical position by rotating the nut member 18. Therefore,
The sheet material 3 can be moved along the boards 2 having different thicknesses with an optimum pressing force. The board loading means 5 includes a roller conveyor 19 and a pinch roll 20. In the roller conveyor 19, a plurality of rollers driven by a motor (not shown) are horizontally arranged. The roller conveyor 19 vertically conveys the board 2 placed thereon toward the guide roll 1. The pinch roll 20 is arranged between the roller conveyor 19 and the guide roll 1, and vertically transports the board 2, which is horizontally transported, like the guide roll 1. Therefore, like the guide roll 1, the pinch roll 20 is mounted so as to be able to move up and down depending on the thickness of the board 2. A limit switch 21 for controlling the board transfer speed of the roller conveyor 19 is provided between the roller conveyor 19 and the pinch roll 20. The limit switch 21 detects that the board 2 has passed and adjusts the speed at which the roller conveyor 19 transfers the board 2. That is, the tip of the board 2 is the limit switch.
The board 2 is transferred at a high speed until it comes into contact with the substrate 21, and then slowly transferred to supply the board 2 to the guide roll 1. The discharging means 6 of the board 2 is composed of a belt conveyor. The belt conveyor, the guide roll 1, the pinch roll 20, and the roller conveyor 19 are linearly arranged in substantially the same horizontal plane so that the board 2 can be transferred horizontally. The cutting / temporary fixing means 7 is arranged between the guide roll 1 and the belt conveyor. This is to cut the end of the sheet material 3 along the surface of the board 2 and weld it to the surface of the board 2 to temporarily fix it. Therefore, disconnection
The temporary fixing means includes a cutter 22, a pressing plate 23, and a heater 24. As described above, the method of temporarily fixing the sheet material 3 along the surface of the board 2 and carrying it into the hot press has a feature that the board in which the sheet materials are laminated can be easily carried into the hot press. However, the sheet material does not necessarily have to be temporarily fixed to the board and carried into the hot press. Therefore, the present invention does not specify the step of temporarily fixing the sheet material to the board and carrying it in. The apparatus of FIG. 4 configured as described above adheres the sheet material 3 to both surfaces of the board 2 in the following steps. The sheet material 3 is sent out from the film roll 8 of the rewinding member to the feed roll 10. The sheet material 3 is clamped between the feed roll 10 and the clamp roll 11 so that the sheet material 3 can be delivered in a fixed amount without slipping. The feed roll 10 rotates, and also the feed roll 10
The sheet material 3 is fed out for a fixed length while measuring the rotation of the encoder 13 by the encoder 13. The feeding amount of the sheet material 3 is adjusted to such a length that the board 2 can be carried into the guide roll 1 and the sheet material 3 can follow the lower surface of the board 2.
The feed roll 10 is stopped after feeding the sheet material 3 of a fixed length. Sheet material 3 sent out by receiving conveyor 12 being driven
Is placed on top and is transferred in a plane. After that, the receiving conveyor 12
Is stopped. The roller conveyor 19 supplies the board 2 at high speed. When the board 2 hits the limit switch 21, the roller conveyor 19 slowly transfers the board 2 to the pinch roll 20. The pinch roll 20 transfers the board 2 toward the guide roll 1, and the board 2 is transferred from the guide roll 1 to the belt conveyor. The sheet material 3 runs along the upper and lower surfaces of the board 2 that has passed through the guide roll 1. The sheet material 3 along the lower surface of the board 2 is the sheet material 3 below the guide roll 1 and placed on the receiving conveyor 12. The sheet material 3 along the upper surface of the board 2 is sent out from the feed roll 10 as the board 2 is transferred. In other words, the guide roll 1 causes the sheet material 3 to be along both the upper and lower surfaces while transferring the board 2. The sheet material 3 along the board 2 does not slip on the surface of the board 2. Therefore, the length by which the guide roll 1 transfers the board 2 in a unit time is adjusted to be equal to the length by which the feed roll 10 sends out the sheet material 3. However, it is also possible to make the feed roll 10 feed the sheet material 3 a little larger than the feeding amount of the board 2. The board 2 sent out from the guide roll 1 and set on the belt conveyor has sheet materials 3 on both sides. At this position, the rotation of the belt conveyor and the guide roll 1 is stopped. The pressing plate 23 descends, presses the end of the sheet material 3 against the upper surface of the board 2, and the cutter 23 moves laterally to move the sheet material 3
Disconnect the end of. The heater heats the sheet material 3, and the sheet material 3 is welded to the surface of the board 2 and temporarily fixed. The pressing plate 23 moves up and transfers the board 2 to the hot press. The tip end of the cut sheet material 3 is transported together with the board 2 and is fed to the left from the guide roll 1 in FIG. If the board is carried in between the guide rolls in this state, the sheet material cannot fit along the lower surface of the board. In order to get the sheet material along the lower surface of the board, it is necessary to position the sheet material on the right side of the guide roll.
In order to position the front end of the sheet material 3 on the right side of the guide roll 1, the feed roll 10 is reversed to rewind the sheet material 3. When the front end of the sheet material 3 is rewound to the right side of the guide roll 1, the reverse rotation of the feed roll 10 is stopped. The encoder 13 detects the length by which the feed roll 10 reversely rotates to rewind the sheet material 3. After that, the feed roll 10 again rotates in the forward direction to feed the sheet material 3 by a predetermined amount. Hereinafter, the steps from to are repeated to carry out the board with the sheet material on both sides. Although not shown, the board having the sheet material on both sides is carried into the hot press via a transfer means or directly. The hot press presses and heats the sheet material and the board to bring the sheet material into close contact with the board.

[Brief description of drawings]

1 to 3 are schematic sectional views showing steps of a method for adhering a sheet material to both sides of a board according to an embodiment of the present invention, and FIG. 4 is a concrete example of an apparatus for adhering a sheet material to both sides of the board. It is a side view which shows an example. 1 ... Guide roll, 2 ... Board, 3 ... Sheet material, 4 ... Feeding means, 5 ... Loading means, 6 ... Ejecting means, 7 ... Cutting / temporary fixing means, 8 ... Film roll, 9 ... Rewinding member, 10 ... Feed roll, 11 ... Clamp roll, 12 ... Receiving conveyor, 13 ... Encoder, 14 ... Upper / lower stand, 15 ... Guide, 16 ... Screw rod, 17 ... Frame, 18 ... Nut material, 19 ... Roller conveyor, 20 ... Pinch roll, 21 ... Limit switch, 22 ... Cutter, 23 ... Holding plate, 24 ... Heater.

Claims (1)

[Claims] 1. A method of adhering a sheet material to both surfaces of a board, which comprises the following steps. (A) A step of supplying the sheet material 3 that hangs the sheet material 3 on the supply side surfaces of the guide rolls 1 that are vertically opposed to each other, equal to or longer than the entire length of the board 2, and (b) sheet material. 3 is a side surface of the guide roll 1 that is hung, and the board 2 is loaded between the upper and lower guide rolls 1. When the board 2 is loaded, the sheet material 3 is sent out, and the sheet material 3 is sent out. And (c) pressing the board 2 having the sheet material 3 on both sides with a hot press to bring the sheet material 3 that has been hung down on the upper surface of the sheet material 3 into the sheet material 3 Of adhering to the surface of the board 2.