JP3946334B2 - Adhesive applicator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is an adhesive applicator comprising a transfer roll that receives a uniform amount of an adhesive solution from an adhesive supply source, wherein the adhesive supply elements distributed around the transfer roll include The present invention relates to an adhesive applicator configured to receive and transfer a conditioned adhesive solution to an article to be bonded.
[0002]
[Prior art]
The transfer roll of the prior art adhesive applicator is continuously fed with a uniform amount of adhesive solution that is exposed to a free atmosphere during operation. Therefore, the water present in the adhesive and other liquids for dilution present in the adhesive will continuously evaporate, resulting in not only the adhesive in the adhesive solution, but also the final The adhesive of the adhesive source through which the transfer roll rotates continuously is also concentrated, particularly if the transfer roll temporarily receives no adhesive. However, when the dilution water or other liquid evaporates, the adhesive loses its usefulness and adversely affects the transport of the formatted adhesive solution.
[0003]
[Problems to be solved by the invention]
Accordingly, it is an object of the present invention to provide a transfer roll that receives a uniform amount of an adhesive solution from an adhesive source, wherein an adhesive supply element distributed around the transfer roll includes a formatted adhesive. To provide an adhesive applicator configured to receive an agent solution and transfer it to an article to be bonded, which can easily and quickly prevent undesired concentration of the adhesive on the transfer roll. It is in.
[0004]
[Means for Solving the Problems]
This object of the present invention is achieved by providing at least one nozzle directed to the transfer roll through which the transfer roll is sprayed with a liquid that dilutes an adhesive such as water.
A manual valve can be provided in the supply line to the nozzle for spraying onto the transfer roll. When the machine operator observes the concentration of the adhesive in the adhesive solution on the transfer roll, by spraying water or other liquid onto the transfer roll by operating the valve once or several times, the adhesive solution Not only the adhesive within, but also the optional adhesive source adhesive can be diluted as desired.
In a preferred embodiment of the present invention, at least one sensor for measuring the water content or liquid content of the adhesive solution can be provided. The sensor signal is supplied to an electronic computer / controller which operates a valve located in the supply line to the nozzle as a function of the measured moisture in the adhesive solution. This design of the present invention continuously and automatically monitors the moisture content of the adhesive solution, and by spraying the liquid when the moisture content decreases excessively and the adhesive viscosity increases, It makes it possible to increase the water content of the agent solution.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows a transfer roll 1 for transferring an adhesive solution, and the transfer roll 1 is provided with a counter roll 2 for capturing excess adhesive supplied from a format roll 14.
The roll slit formed between the transfer roll 1 and the counter roll 2 functions as a trough for the adhesive 3, and the surface of the roll slit into which the adhesive is drawn is formed by a seal plate in this embodiment. It is sealed. The counter roll 2 is arranged close to the format roll 14 such that the supply element 12 of the format roll 14 slightly contacts the counter roll 2.
[0006]
Under the transfer roll 1 and the counter roll 2, a trap 5 is disposed, and the trap 5 includes scraping blades 6 and 7. Here, the scraping blade 6 is for the counter roll 2 and the scraping blade 7 is for the transfer roll 1. The trap 5 has a drain 8 and is configured to be moved up and down by piston cylinder units 9 and 10. A supply line 11 is provided above the catcher 5 and below the transfer roll 1 and the counter roll 2, and either an adhesive or rinsing water is passed through the supply line 11 according to the position of the direction control valve 12. Is fed into a roll slit between the transfer roll 1 and the counter roll 2.
During the transfer of the adhesive, the adhesive diffusion segment 13 attached around the format roll 14 rotates to contact the surface of the transfer roll 1 and remove a certain amount of adhesive. A part of the adhesive is thrown out by the peripheral speed of the format roll 14 and the adhesive diffusion segment 13. Thus, a part of the adhesive released is returned to the dye bath 3 by the mutual arrangement of the rolls 1, 2 and 14. For this reason, it is not necessary for the portion of the adhesive that is thrown out of the segment 13 to contaminate the machine element or to be considered to be discarded. The adhesive applicator described above is also known from the German patent (DE 41 40 835 A1).
[0007]
A spray nozzle 16 is attached to the rear wall of the trap 5 by a holder 15, and the spray nozzle 16 is directed to the bottom region of the transfer roll 1. Water is supplied to the spray nozzle 16 via a line 17. The line 17 is provided with a main valve 18 and a manual valve 19. In operation, when the main valve 18 is opened and the tappet 20 of the valve 19 is manually operated, water is sprayed onto the transfer roll 1 as indicated by the spray jet 21.
In the embodiment shown in FIG. 2, a non-contact sensor 22 having a function of measuring the moisture content is directed to the transfer roll 1. This sensor 22 is not shown, but is always fixed to the frame and sends a signal via line 23 as a function of the amount of water measured in the adhesive solution of transfer roll 1 via an electronic computer / controller. 24. Based on the measurement signal, the computer / controller 24 determines the current amount of moisture in the adhesive solution and, if the amount of moisture in the adhesive solution is excessively reduced, via the solenoid valve 25, the spray nozzle. 16 is activated.
[0008]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the adhesive applicator which can prevent the unwanted concentration of the adhesive agent on a transfer roll simply and rapidly.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an adhesive applicator with a manual spray nozzle.
2 is a schematic diagram showing the adhesive applicator of FIG. 1 with an automatic humidifier.
[Explanation of symbols]
1 Transfer roll 2 Counter roll 14 Format roll 16 Spray nozzle 18 Main valve 19 Manual valve 22 Sensor 24 Computer / controller 25 Solenoid valve

Claims (1)

Comprising a transfer roll in which the adhesive of uniform amount from the dyebath is attached between the transfer roll and the counter roll, adhesive supplying elements which are distributed around the format roll, the portion of the transfer roll adhesive solution In an adhesive applicator configured to remove and transfer this adhesive solution to the article to be bonded,
There is provided at least one nozzle (16) that is directed to the transfer roll (1) and is capable of spraying the transfer roll (1) with a liquid (21) for diluting the adhesive;
At least one non-contact sensor (22) for measuring the amount of water in the adhesive solution on the transfer roll (1) is provided, and the signal of this sensor (22) is fed to the electronic computer / controller (24). And
The computer / controller (24) activates the nozzle (16) via a valve (25) located in the supply line to the nozzle (16) when the measured moisture content of the adhesive solution decreases. Adhesive applicator characterized by.

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