JPH07155671A - Adhesive coating device - Google Patents

Abstract

PURPOSE:To ensure that various types of leaf-like sheet, each type being in a small quantity can be dealt with efficiently and an entire device be made compact in size. CONSTITUTION:An adhesive application device is composed of a combination of a T die which discharge a hot melt adhesive intermitterntly and moves vertically and an application table 2 which moves back and forth at a specified stroke in a horizontal direction below the T die 1 and travels at an endlessly adjustable speed. It is possible to apply the hot melt adhesive directly to a leaf-like base sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive application device for applying a hot melt adhesive to a sheet of sheet.

[0002]

2. Description of the Related Art Conventionally, as a device for applying a hot melt adhesive, there is known a device in which a wound sheet is fed out and the hot melt adhesive is discharged from a T die and applied. .

[0003]

As described above, in the conventional adhesive applying device, the hot-melt adhesive is applied to the rolled-up sheet, so that the sheet-shaped adhesive-applied sheet is applied. In order to obtain the sheet (1), a device for cutting the rolled sheet after applying the adhesive into sheets is required. For this reason, it is difficult to deal with a small number of various types of sheet-shaped sheets, and there is a problem that the entire apparatus becomes large.

The present invention has been made in view of the above circumstances, and an object of the present invention is to efficiently cope with a small amount of a wide variety of sheet-shaped sheets and to downsize the entire apparatus. In order to provide an adhesive application device.

[0005]

In order to achieve the above object, an adhesive coating apparatus of the present invention is provided with a T-die which can intermittently discharge hot-melt adhesive and moves up and down, and below the T-die. It is characterized in that it is provided with a coating table which reciprocates in a horizontal direction at a predetermined stroke and whose movement speed can be adjusted steplessly.

[0006]

In the adhesive coating device having the above structure, the T die is lowered so that a predetermined gap is formed between the adhesive coating device and the base material sheet which is the coating object placed on the coating table. The hot melt adhesive is applied to the surface of the base sheet by discharging the hot melt adhesive from the T-die while moving the application table at an optimum speed so as to pass under. Then, after the coating, the T die is raised, the coating table is moved to the original position, the base sheet is replaced with a new one, and the same steps are repeated to hot-melt bond the desired number of base sheets. The agent can be applied.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, the adhesive coating device is capable of intermittently discharging hot melt adhesive and vertically moving, and a T die 1 which reciprocates horizontally below the T die 1. The coating table 2 is capable of continuously adjusting its moving speed.

The T-die 1 is connected to a lower portion of a tank 3 containing a hot melt adhesive via a solenoid valve 4. A constant pressure is constantly applied to the inside of the tank 3 by the compressed air sent through the pipe 5 above the tank 3, and the hot melt adhesive in the tank 3 is removed from the T die 1 by opening and closing the solenoid valve 4. It is designed to be discharged intermittently. Further, the tank 3 is attached to a frame 7 which moves up and down by an air cylinder 6, and a screw type stopper 8 is provided below the frame 7 to set a lower limit position of the frame 7 which moves up and down. The gap between the T die 1 and the coating table is adjusted.

The coating table 2 is provided with a ball screw unit 9 in the lower part, and when the unit 9 is driven by a motor 10, it is reciprocated in a horizontal direction with a predetermined stroke. Motor speed is 1
It can be adjusted steplessly by adjusting the number of revolutions of zero. The stroke of the coating table 2 is adjusted using a contact sensor (not shown), and the coating length can be changed by adjusting this stroke.

Further, the coating table 2 is connected to a compressor 11 for adsorbing and fixing the base material sheet S placed thereon. Further, as can be seen by referring to FIG. 2, dial gauges 12 are installed on both sides in the width direction of the coating table 2, and the stem 12a
The parallelism between the T-die 1 and the coating table 2 is measured by raising and bringing it into contact with the T-die 1.

In FIG. 1, reference numeral 13 is a coating table moving switch, which is operated by hitting the upper portion of the frame 7 when the T die 1 is lowered to the lower limit position. Also,
Reference numeral 14 is a T-die discharge start switch, 15 is a T-die discharge end switch, and 16 is a T-die lift switch, which are respectively arranged along the moving direction of the coating table 2 and protrude below the coating table 2. It works by hitting.

The operation of applying the hot melt adhesive to the base sheet S by the adhesive applying device having the above structure will be described.

First, the base material sheet S is placed and positioned on the coating table 2 by hand. Then
The compressor 11 is activated and the base sheet S is adsorbed and fixed on the coating table 2. In this way, the base sheet S
After setting, press the continuous operation switch to start continuous operation.

First, the air cylinder 6 operates to lower the lower portion of the frame 7 until it abuts the stopper 8, and at the same time, the upper portion of the frame 7 moves the coating table moving switch 1
By hitting 3, the motor 10 is activated and the coating table 2 starts moving to the right. When the coating table 2 advances and the projecting piece 2a hits the T-die discharge start switch 14, the electromagnetic valve 4 is opened, and the hot-melt adhesive is discharged from the T-die 1. Then, the hot melt adhesive is applied to the surface of the base material sheet S as the application table 2 moves, and when the application to the base material sheet S is finished, the projecting piece 2a hits the T-die discharge end switch 15. The solenoid valve 4 is closed. After that, the coating table 2 further moves to the right and the projecting piece 2a hits the T-die raising switch 16, whereby the air cylinder 6 operates and the frame 7 is raised.
The T die 1 is retracted above the coated surface of the substrate sheet S. After that, the coating table 2 returns to the original position, the compressor 11 is stopped, and the suction state of the base material sheet S is released.

After the above continuous operation is completed, the substrate sheet S coated with the hot melt adhesive is manually removed from the coating table 2. Then, by placing a new base material sheet S on the application table 2 and repeating the same steps, the hot melt adhesive can be applied to a desired number of base material sheets S.

[0017]

As described above, the adhesive coating device of the present invention is capable of intermittently ejecting hot melt adhesive and vertically moving, and a predetermined horizontal portion below the T die. Since the stroke is reciprocating and the moving speed can be adjusted steplessly, the application table is combined, so that the sheet-shaped base material sheet is placed on the application table and the hot melt adhesive is applied directly. Therefore, it is possible to efficiently cope with a small lot, and it is also possible to downsize the entire apparatus.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of an adhesive application device according to the present invention.

FIG. 2 is an enlarged top view showing a coating table together with a T die.

[Explanation of symbols]

 1 T-die 2 Coating table 3 Tank 4 Solenoid valve 5 Pipe 6 Air cylinder 7 Frame 8 Stopper 9 Ball screw unit 10 Motor 11 Compressor 12 Dial gauge 13 Coating table moving switch 14 T-die discharging start switch 15 T-die discharging end switch 16 T-die Lift switch

Claims (1)

[Claims] 1. A T-die that can intermittently discharge hot-melt adhesive and moves up and down, and reciprocally moves below the T-die in a horizontal direction with a predetermined stroke, and its movement speed can be adjusted steplessly. Adhesive applicator, characterized by comprising: