JPH10156264A - Self-adhesive circulating-coating apparatus and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the working load by a worker, to perfectly automate work and to coat a member to be coated with a self-adhesive having stable characteristics in an extremely good state. SOLUTION: A self-adhesive 56 is supplied to a coating unit 66 from a self-adhesive storage tank 58 by a supply pump 68 through pipelines 84c-84g. In this case, heaters 82c-82g are wound around the pipelines 84c-84g and the self-adhesive 56 is held to predetermined temp. to be supplied to the coating unit 66. In the coating unit 66, the self-adhesive 56 adjusted to predetermined temp. is applied to decorative paper 50 through a coating roller 98.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive circulating coating apparatus and method for applying a pressure-sensitive adhesive circulated to a member to be coated.

[0002]

2. Description of the Related Art For example, an outer peripheral portion of a box-shaped package body for storing a predetermined product is provided for improving aesthetic appearance, or
Decorative paper may be attached to mark predetermined information. In this case, the decorative paper is attached to the package after applying an adhesive to the back surface.

FIG. 17 shows the configuration of a conventional apparatus for applying an adhesive to such decorative paper. This device is used for the decorative paper 2 conveyed by the conveyors 1a and 1b.
An adhesive 4 such as glue is applied from between two rollers 3a and 3b. The adhesive 4 is stored in a storage tank 5, and the storage tank 5 is immersed in warm water 7 stored in a heating tank 6. Hot water 7
Is heated to a predetermined temperature by a heater 8, and the adhesive 4 heated by the hot water 7 is supplied between the rollers 3 a and 3 b by a supply pump P via a conveyance path 9. The surplus adhesive 4 is sent back to the storage tank 5 via the gutter 11.

[0004]

In this case, the viscosity of the pressure-sensitive adhesive 4 such as glue changes depending on its temperature and concentration.
In the conventional apparatus, since the pressure-sensitive adhesive 4 is heated only in the storage tank 5, the viscosity is increased due to a decrease in temperature while being conveyed to the rollers 3 a, 3 b, and the viscosity is increased. May not be able to be applied. Therefore, it is conceivable to set the temperature of the adhesive 4 in the storage tank 5 to be high, but when the temperature becomes high,
There is a problem that the deterioration of the properties of the adhesive 4 is promoted.

[0005] Further, since the concentration of the pressure-sensitive adhesive 4 increases due to evaporation of water, the viscosity increases with time even at a constant temperature. Conventionally, such adjustment of the concentration
It is performed manually by adding an appropriate amount of hot water to the storage tank 5 based on the experience of the worker. Therefore, there is no guarantee that an optimum concentration will be obtained.

Further, in the conventional apparatus, the viscosity adjustment work before applying the adhesive 4 to the decorative paper 2 and the cleaning work of the adhesive 4 after all the application work are all performed manually. Therefore, the burden on workers is extremely large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to reduce the work required by an operator or to completely automate a pressure-sensitive adhesive having stable characteristics. It is an object of the present invention to provide a pressure-sensitive adhesive circulating coating apparatus and a method capable of applying a pressure-sensitive adhesive to a member to be coated in a state.

[0008]

In order to solve the above-mentioned problems, according to the present invention, at least an adhesive storage tank for storing an adhesive and a coating unit for applying the adhesive to an application member are provided. While heating the pressure-sensitive adhesive circulating and conveying path disposed therebetween to a predetermined temperature by pressure-sensitive adhesive heating means, by adjusting the viscosity of the pressure-sensitive adhesive to a predetermined viscosity by a viscosity controller, the viscosity of the pressure-sensitive adhesive in the coating unit And the pressure-sensitive adhesive can be applied to the member to be coated in a good condition. Since the pressure-sensitive adhesive is not excessively heated, the characteristics do not deteriorate.

Further, in the present invention, prior to a process of applying the circulatingly supplied adhesive to the member to be coated, an adhesive storage tank for storing the adhesive and a member for the member to be coated are provided. After heating a coating unit for applying the adhesive and a circulation conveyance path connecting the adhesive storage tank and the coating unit to a predetermined temperature, the adhesive is supplied to the coating unit. . In this case, the pressure-sensitive adhesive is automatically set to a predetermined viscosity in advance without going through an adjustment operation by an operator. Then, from this state, the predetermined adhesive application operation can be started immediately.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A pressure-sensitive adhesive circulating coating apparatus and a method according to the present invention are provided, for example, by packing a large number of films vacuum-packed (contents) in a box-shaped package, and forming an exterior product (product). ) Will be described with reference to an embodiment applied to a production line to be shipped as (hereinafter referred to as a box making system).

[0011] As shown in FIG.
A content loading portion 12 on which a large number of content 10 are loaded, and a box body sheet 1 serving as a body (box body) 16 of the exterior component 14
A first sheet stacking section 20 on which a large number of sheets 8 are stacked, a second sheet stacking section 26 on which a large number of cover box sheets 24 serving as a cover box 22 of the exterior component 14 are stacked, and a box body sheet 18
Box forming mechanism 28 for forming a box body 16 by bending the box body, and a first sheet removing box body sheet 18 from the first sheet stacking section 20 and putting it into the box body forming mechanism 28. And the contents 10 taken out one by one from the contents stacking section 12 described above.
6 and a cover box sheet 2
Box forming mechanism 3 for forming cover box 22 by bending 4
4, a second sheet feeding mechanism 36 for taking out the lid box sheets 24 one by one from the second sheet stacking section 26 and feeding the lid box forming mechanism 34 to the lid box forming mechanism 34, and a lid box 22
An exterior component production mechanism 38 for producing the exterior component 14 by covering the
A host computer 40 for centrally managing the entire box making system including these components is provided.

A label attaching mechanism for attaching a label 42 on which various information on the contents 10 is recorded to the exterior component 14 is provided at a stage subsequent to the exterior component production mechanism 38 constituting the box making system. 44 is provided, and the exterior component 14 to which the label 42 is attached is configured to be packed on a cardboard 46 and then transferred onto a palletizer 48.

FIG. 2 shows a box body making mechanism 2 of the box making system.
8 shows a configuration of an adhesive circulation application device 52 and a decorative paper supply device 54 for attaching a decorative paper 50 to one side surface of the box body 16 manufactured in FIG. FIG. 3 shows a configuration of an adhesive circulation application device 52 that applies an adhesive 56 to decorative paper 50 attached to the four side surfaces of the box body 16. In addition, the decorative paper 50 is attached to the box body 16.
And an adhesive 56 such as glue for the four sides of the lid box 22.
In practice, one adhesive circulation application device 52 and four decorative paper supply devices 54 are provided as shown in FIG.
Are provided for the box body making mechanism 28 and the lid box making mechanism 34 shown in FIG.

The pressure-sensitive adhesive circulating coating device 52 holds a pressure-sensitive adhesive storage tank 58 for storing a pressure-sensitive adhesive 56 and a hot water 60 heated to a predetermined temperature by a heater 59. Tank 62, a viscosity controller 64 for adjusting the viscosity of the adhesive 56, a coating unit 66 (66 a to 66 d) for applying the adhesive 56 to the decorative paper 50, and an adhesive from the adhesive storage tank 58. Coating unit 66 with agent 56
(66a to 66d)
And the coating unit 66 (66a to 66d)
A return pump 70 (70a to 70d) for returning the pressure-sensitive adhesive 56 to the pressure-sensitive adhesive storage tank 58 from the pressure-sensitive adhesive storage tank 58;
And a temperature controller 72 for adjusting the temperature to a predetermined temperature.

The pressure-sensitive adhesive storage tank 58 has a stirrer 78 including a motor 74 mounted on an upper portion thereof and a fan 76 disposed in the pressure-sensitive adhesive 56 and rotated by the motor 74. The viscosity controller 64 controls the adhesive 5
6 is provided with a water heater 80 for supplying hot water as a diluent to the pressure-sensitive adhesive 56 from the torque generated by stirring the pressure-sensitive adhesive 56 introduced from the pressure-sensitive adhesive storage tank 58.
6, the hot water is added to the adhesive 56 from the water heater 80 so that the viscosity is set to a predetermined viscosity. The pressure-sensitive adhesive storage tank 58 and the viscosity controller 64 are connected by circulation pipes 84a and 84b in which coil-shaped heaters 82a and 82b are wound over the entire length.

The pressure-sensitive adhesive storage tank 58 has conduits 84c to 84g around which heaters 82c to 82g are wound over the entire length.
Through the coating unit 66 (66a-66)
d) is connected. Further, a supply pump 68 for supplying the adhesive 56 to the coating units 66 (66a to 66d) is provided in the conduit 84c. The coating unit 66 (66a to 66d) is made of an adhesive 5
And a buffer 86a-86d for storing a predetermined amount of the pressure-sensitive adhesive 6 in the pressure-sensitive adhesive storage tank 58 via pipes 84h-84m around which heaters 82h-82m are wound over the entire length. Connected to. The pressure-sensitive adhesive 56 is provided in the pipes 84h to 84k with a buffer 86a.
Return pump 70 (70a to 70d) for sending back to pressure sensitive adhesive storage tank 58 from .about.86d. The heaters 82 a to 82 m and 59 are connected to a temperature controller 72.

The pipes 84b and 84c are connected to the heating tank 62 by a pipe 86.
b and 84c have a valve 8 for switching the passage.
8b and 88c are provided. In addition, a pipe 90 is connected to the pipe 84a via a valve 88a. This conduit 9
0, together with a valve 88m disposed in the pipe 84m,
It faces the drain tank 92. Further, the pipeline 84d-
84 g includes a coating unit 66 (66a to 66a).
Valves 88d to 88g for controlling supply / stop of the adhesive 56 for d) are provided.

FIG. 4 shows a coating unit 66 (66).
a to 66d). The coating unit 66 (66a to 66d) includes a housing 94,
A coating roller 98 rotatably supported by the housing 94 and partially projecting from an opening 96 on the side of the housing 94;
And The coating roller 98 is provided with a heater (not shown) for maintaining the adhesive 56 at a predetermined temperature. At the lower end of the opening 96, a saucer 100 protruding from the housing 94 is fixed. Housing 9
4, a partition 102 set at a predetermined height is provided, and the pan 100, the partition 102, and the housing 94 are provided.
And buffers 86a to 86d for storing a predetermined amount of the adhesive 56. The pressure-sensitive adhesive 56 overflowing from the buffers 86a to 86d via the partition 102 is connected to the pipes 84h to 84h to open inside the housing 94.
It is configured to flow into 4k. A doctor blade 106 urged toward the coating roller 98 by the coil springs 104a and 104b is provided above the opening 96. This doctor blade 10
6 are projections 108a whose both ends along the axis of the coating roller 98 are close to the coating roller 98;
108b and the projections 108a, 108b
The space is a recess 110 which is separated from the coating roller 98 by a predetermined distance (see FIG. 5).

Next, regarding the configuration of the decorative paper supply device 54,
A description will be given based on FIG. 2 and FIG. Makeup paper supply device 54
Is a decorative paper web 1 obtained by winding a decorative paper 50 in a roll shape.
12 and decorative paper 50 taken out of the decorative paper web 112
Dancer roller 114 for preventing slack and decorative paper 50
The coating roller 98 of the coating unit 66 (66a to 66d) constituting the adhesive circulation coating device 52
Roller 116 for abutting the box, a final conveyor 118, a sticking conveyor 120 for sticking the decorative paper 50 to the box body 16, and a final conveyor 1
18 and the sticking conveyor 120, and the decorative paper 5
A cutter 122 that cuts a zero into a predetermined length;
2 is basically composed of an adhesive removing mechanism 124 for wiping the adhesive 56 adhered to the adhesive 2.

Final Conveyor 118 and Sticking Conveyor 1
20 has belts 126 and 128 having a plurality of holes, and vacuum units 130 and 132 for adsorbing the decorative paper 50 are disposed between the belts 126 and 128. In addition, the final conveyor 118 and the attaching conveyor 12
Between zero, vacuum units 134 and 136 are arranged around a passage 129 through which the cutter 122 is inserted. The vacuum unit 1 is located above the passage 129.
A supply pipe 131 for supplying air is provided between the vacuum holes 34 and 136 and between the legs 142a and 142b of the guide member 138 that transports the decorative paper 50. A guide member 138 is provided at a position near the vacuum unit 134 in the upper surface of the belt 126 constituting the final conveyor 118. As shown in FIG. 6, the guide member 138 has a flat portion 140 along the belt 126 and two legs 142a and 142b extending from the flat portion 140 onto the vacuum unit 134. The bent side portion of the flat portion 140 is supported by the shaft member 146. A cylinder 148 is connected to an end of the guide member 138 that is separated from the flat portion 140, and the guide member 138 is configured to swing under the control of the cylinder 148. A cylinder 150 for displacing the decorative paper 50 cut by the cutter 122 with the sticking conveyor 120 with respect to the box body 16 is provided on the sticking conveyor 120.

The adhesive removing mechanism 124 has trays 154, 156 storing water 152, and the trays 154, 156
, Felt members 158 and 160 whose lower end portions are immersed in water 152 and whose upper end portions face each other with a predetermined distance therebetween. Further, displacement members 164 and 166 constituting the felt moving hand 162 are fixed to the outside of the upper ends of the felt members 158 and 160. The felt members 158 and 160 can be moved toward and away from each other by the displacement members 164 and 166.

FIG. 7 is a control block diagram of the pressure-sensitive adhesive circulating coating device 52 and the decorative paper supply device 54 configured as described above. In the figure, the adhesive circulation application device 52, the decorative paper supply device 54, and the box transport mechanism 168 are connected to the host computer 4 via the sequence controller 170.
Controlled by 0. The box transport mechanism 168
Transports the box body 16 to a predetermined position of the decorative paper supply device 54.

The pressure-sensitive adhesive circulating device 52 and the decorative paper supply device 54 of this embodiment are basically configured as described above, and the operation thereof will be described next.

First, prior to the activation of the box making system, the host computer 40 executes an automatic start-up process of the pressure-sensitive adhesive circulating / applying device 52 according to the flow shown in FIG.

That is, the host computer 40 constantly monitors information on the date and time of activation of the box making system by using a calendar timer.
It instructs the sequence controller 170 to automatically start the pressure-sensitive adhesive circulating coating device 52. Therefore, the sequence controller 170
To turn on the hot water heater and set the timer (steps S1 and S2). This allows
A predetermined current is supplied to the heater 59, the hot water 60 is heated to a predetermined temperature, and a heater (not shown) in the water heater 80 is energized to heat the hot water for diluting the adhesive 56 to a predetermined temperature.

Next, the sequence controller 170
The motor 74 constituting the stirrer 78 is driven, and the fan 76
Is rotated to start stirring the adhesive 56 in the adhesive storage tank 58 (step S3). further,
The sequence controller 170 is the viscosity controller 64
While heating the inside to a predetermined temperature, the pressure-sensitive adhesive storage tank 5
8a and 84b between the viscosity controller 64
The heaters 82a and 82b wound around are heated for a time set by a timer to heat the adhesive 56 to a predetermined temperature (steps S4 and S5).

After the above processing is completed, the viscosity controller 64 is turned on (step S6). As a result, the circulation operation of the pressure-sensitive adhesive 56 between the pressure-sensitive adhesive storage tank 58 and the viscosity controller 64 is started by the circulation pump (not shown) constituting the viscosity controller 64. After the predetermined time set by the timer has elapsed (step S7), the viscosity control of the adhesive 56 by the viscosity controller 64 is started, and the heater 8 is controlled for the predetermined time set by the timer.
2c to 82m (steps S8, S9, S1
0).

Based on the timer time set in step S10, when each part in the adhesive circulation coating device 52 is heated to a predetermined temperature, the coating unit 66 (66a to 66a) is heated.
66d) is heated by a heater (not shown) for a time set by a timer (steps S11 and S12). Next, after the timer time set in step S12 has elapsed, the return pump 70 (70a to 70d) is driven for a predetermined time set by the timer, and the adhesive remaining in the pipes 84h to 84m in the previous process is operated. 56 is returned to the adhesive storage tank 58 (steps S13 and S1).
4). Further, after the above processing is completed, the supply pump 68 is driven for a predetermined time (steps S15 and S16). Finally, after the timer set time in step S16 has elapsed, the start of the circulation cycle is notified to the host computer 40 via the sequence controller 170, thereby ending the automatic start-up processing of the adhesive circulation application device 52. (Step S17).

By performing the automatic start-up process as described above, the pressure-sensitive adhesive 5 circulating in the pressure-sensitive adhesive
In No. 6, the temperature and the concentration are automatically controlled to predetermined values, and are always supplied to the decorative paper 50 with a constant viscosity.

Next, after the completion of the automatic start-up process, the box body 16 is transported to a predetermined portion of the decorative paper supply device 54 by the box transport mechanism 168. That is, the box body sheet 18 loaded on the first sheet loading section 20
Is transported by the first sheet input mechanism 30 to the box body manufacturing mechanism 28, and then the side faces of the box body 16 are bent, and the side faces are fixed to each other by tape or the like, whereby the box body 16 is manufactured. , To the decorative paper supply device 54. Then, the decorative paper 50 wound around the decorative paper web 112 is conveyed to the coating unit 66 (66a to 66d) constituting the adhesive circulation coating device 52 after a predetermined tension is added by the dancer roller 114, An adhesive 56 is applied to one surface.

That is, the pressure-sensitive adhesive 56 stored in the pressure-sensitive adhesive storage tank 58 is supplied to a predetermined coating unit 66 by a supply pump 68 via pipes 84c to 84g heated to predetermined temperatures by heaters 82c to 82g. 6
6a to 66d). Coating unit 6
The adhesive 56 supplied to 6 (66a to 66d) is stored in the buffers 86a to 86d, and is then absorbed by the coating roller 98 partially immersed therein. Since the backup roller 116 is in contact with the coating roller 98 via the decorative paper 50 supplied from the decorative paper web 112, the adhesive 56 adsorbed by the coating roller 98 is applied to one surface of the decorative paper 50. Will be applied.

Here, the coating unit 66 (66
The adhesive 56 stored in the buffers 86a to 86d a) to 66d) is heated and supplied to a predetermined temperature by the heaters 82a to 82m and is adjusted to a predetermined viscosity by the viscosity controller 64. The decorative paper 50 is applied to the decorative paper 50 with a constant and stable viscosity, and an application surface without coating unevenness is formed on the decorative paper 50. A doctor blade 106 having a recess 110 formed in the center is provided above the coating roller 98.
4a and 104b are close to each other while being pressed. Therefore, the adhesive 56 applied to the decorative paper 50 is applied such that the central part of the decorative paper 50 is thick and the side edges are thin as shown in FIG. As a result, when the decorative paper 50 is attached to the side surface of the box main body 16 as described later, the adhesive 56 does not protrude, so that the state of the box main body 16 and the decorative paper 50 after the application is extremely good. It can be.

The coating unit 66 (66a)
The excess adhesive 56 overflowing from the buffers 86a to 86d in the steps 66 to 66d) is sent back to the adhesive storage tank 58 via the pipes 84h to 84m. In this case, the pipe 84
Since the heaters 82h to 82m are wound around h to 84m, the pressure-sensitive adhesive 56 is returned to the pressure-sensitive adhesive storage tank 58 at a predetermined temperature. Therefore, the coating unit 66 (66) is again supplied by the supply pump 68.
The pressure-sensitive adhesive 56 circulated and supplied in a to 66d) is applied to the decorative paper 50 in a very good state with little temperature fluctuation.

On the other hand, the decorative paper 50 coated with the adhesive 56
Is conveyed to the final conveyor 118 via the backup roller 116 as shown in FIG. A vacuum unit 130 is provided on the final conveyor 118, and the decorative paper 50 is sucked by the suction force of the vacuum unit 130, and the leading end reaches the vacuum unit 134.

Here, a flat portion 140 of the guide member 138 is disposed on the end of the final conveyor 118, and two flat portions 140 extending from the flat portion 140 are provided above the vacuum unit 134. The legs 142a and 142b are arranged (see FIG. 6). In this case, the flat portion 14
When the decorative paper 50 is fed to the conveyor 120 side, as shown in FIG.
Under the action of the cylinder 148, the legs 142a and 142b are tilted in a state of being lifted upward. Therefore, the decorative paper 50
Is displaced toward the upper feed pipe 131 via the flat portion 140 and the legs 142a and 142b. The ends are brought into close contact with the legs 142 a and 142 b by air supplied from the supply pipe 131, and
A predetermined strength is given by introducing a part between 2a and 142b in a curved state. Decorative paper 50 is the final conveyor 1
When the decorative paper 50 is further conveyed to the sticking conveyor 120 side in this state, the end portion gets over the upper part of the passage 129 formed between the vacuum units 134 and 136, and the sticking conveyor 120 side (See FIGS. 11 and 14B). In this case, even if the end of the decorative paper 50 is curled, the passage 1
There is no risk of being caught on the 29 side.

The end of the decorative paper 50 is attached to the adhering conveyor 120.
Side, the guide member 138 rotates under the action of the cylinder 148, and the flat portion 140 and the leg portions 142a,
142b comes into close contact with the belt 126 of the final conveyor 118 (see FIG. 14C). Therefore, in a state where the decorative paper 50 is sucked by the vacuum unit 132 of the conveyor 120, a predetermined amount of the decorative paper 50 is further conveyed to the sticking conveyor 120 side, and then the conveying operation is stopped. In this case, the decorative paper 50 includes the final conveyor 118 and the sticking conveyor 120.
It is positioned in a state where it is adsorbed on. In the above state, the decorative paper 50 is held by blowing air from the feed pipe 131 to the decorative paper 50 and starting suction by the vacuum units 134 and 136. Next, the decorative paper 50 is cut by moving the cutter 122 along the passage 129 (see FIGS. 12 and 14D). In addition, since the decorative paper 50 is completely adhered to the vacuum hole by the air at the cut portion, the decorative paper 50 is set to have a strong stiffness against the force applied in the lateral direction. Therefore, the cutting of the decorative paper 50 is performed reliably and smoothly.

FIGS. 15A to 15C illustrate the cutter 122.
This shows the operation of. The cutter 122 moves along the passage 129 toward the adhesive removing mechanism 124, and cuts the decorative paper 50 (see FIG. 15A). When the cutter 122 cut from the decorative paper 50 enters between the felt members 158 and 160 constituting the adhesive removing mechanism 124, the displacement members 164 and 166 constituting the felt moving hand 162 are displaced so as to approach each other, This allows the cutter 122
Is held between the felt members 158 and 160 (see FIG. 15B). In this case, the felt members 158, 1
At 60, the water 152 stored in the trays 154 and 156 is sucked up by capillary action. Next, the cutter 122 is displaced downward from the state described above, and the adhesive 56 attached to the cutter 122 is removed by the felt members 158 and 160 (see FIG. 15C). The cutter 122 from which the adhesive 56 has been removed as described above returns to the original position before cutting the decorative paper 50 again.

The decorative paper 50 cut into a predetermined length as described above and conveyed onto the adhering conveyer 120 is fed to the box main body 16 under the action of the cylinder 150.
By being displaced toward the side surface of the, it is attached to the side surface (see FIG. 13). In this case, the decorative paper 5
As shown in FIG. 9, the adhesive 56 is thickly applied to the center portion, while the side edges are thin as shown in FIG. It is possible to avoid a situation in which the protruding portion protrudes. Therefore, it is possible to obtain the box main body 16 having a good state after the attachment.

The above processing is performed on each of the four side surfaces of the box main body 16, and is similarly performed on the four side surfaces of the lid box 22.

The box body 16 to which the decorative paper 50 is stuck is carried into the contents loading mechanism 32, where the contents 10 are stored. Next, the paper is transported to the exterior part production mechanism 38 and the decorative paper 5
The exterior article 14 is produced by mounting the lid box 22 to which the “0” is attached. The exterior article 14 is conveyed to a label sticking mechanism 44, and after a label 42 on which various information related to the contents 10 is recorded is stuck to the outside, it is stored in a cardboard 46 and placed on a palletizer 48. Will be.

When the above-described box making process is completed and the box making system is to be terminated, the termination process of the pressure-sensitive adhesive circulating coating apparatus 52 is performed according to the automatic termination sequence shown in FIG. That is, after the circulation operation of the adhesive 56 by the supply pump 68 is stopped (step S20), the valve 8
8c, the heating tank 62 is connected to the coating units 66 (66a to 66d), while the adhesive storage tank 58 is connected to the coating units 66 (66a to 66d).
66d). Next, the return pump 70
(70a to 70d) are driven (step S21). In this case, due to the suction action of the return pump 70 (70a to 70d), the hot water 60 stored in the heating tank 62 is passed through the pipes 84c to 84g to form the coating unit 6.
6 (66a-66d), then line 84h
From the valve 88m to the drain tank 9
It is discharged to 2. By this processing, each of the pipelines 84c to 8c
4m and coating unit 66 (66a-66d)
The cleaning process of the adhesive 56 remaining on the substrate can be automatically performed. After performing the above-described cleaning process for a predetermined time,
All the heaters 82a to 82m and 59 are turned off, and the operation of the adhesive circulation coating device 52 is ended (step S2).
2). In this way, the cleaning operation of the adhesive circulation coating device 52 can be automatically performed.

[0042]

As described above, according to the present invention, while the pressure-sensitive adhesive circulating transport path through which the pressure-sensitive adhesive is transported is heated to a predetermined temperature by the pressure-sensitive adhesive heating means, the viscosity of the pressure-sensitive adhesive is controlled by a viscosity controller. Therefore, the pressure-sensitive adhesive supplied to the coating unit is satisfactorily applied to the application member in a state of stable viscosity. Further, since the viscosity of the pressure-sensitive adhesive can be automatically adjusted as described above, the adjustment work by the operator is not required, and the viscosity can be adjusted with high accuracy. Further, since the pressure-sensitive adhesive is not heated excessively, the characteristics do not deteriorate. Furthermore, the viscosity of the pressure-sensitive adhesive can be automatically set to an optimal state prior to the operation of applying the pressure-sensitive adhesive to the member to be coated, so that the application can be started efficiently.

[Brief description of the drawings]

FIG. 1 is an overall explanatory diagram of a system for manufacturing an exterior component to which a pressure-sensitive adhesive circulating coating apparatus of the present invention is applied.

FIG. 2 is a configuration diagram of a pressure-sensitive adhesive circulating application device and a decorative paper supply device in the manufacturing system.

FIG. 3 is a detailed block diagram of the pressure-sensitive adhesive circulating coating apparatus.

FIG. 4 is a perspective configuration diagram of a coating unit in the pressure-sensitive adhesive circulating coating apparatus.

FIG. 5 is an explanatory front view of a coating unit.

FIG. 6 is a detailed perspective configuration diagram near an adhesive removing mechanism in the decorative paper supply device.

FIG. 7 is a control block diagram of the pressure-sensitive adhesive circulating application device and the decorative paper supply device.

FIG. 8 is a processing flowchart when starting up the manufacturing system.

FIG. 9 is an explanatory diagram of a state of an adhesive applied to decorative paper.

FIG. 10 is an explanatory diagram of a state in which the decorative paper is transported to a final conveyor in the decorative paper supply device.

FIG. 11 is an explanatory view of a state in which the decorative paper is transported to a sticking conveyor in the decorative paper supply device.

FIG. 12 is an explanatory diagram of a state in which decorative paper is cut in the decorative paper supply device.

FIG. 13 is an explanatory diagram of a state in which the decorative paper is attached to the side surface of the box main body in the decorative paper supply device.

FIGS. 14A to 14D are explanatory diagrams of a process of transporting and cutting decorative paper in the decorative paper supply device.

FIGS. 15A to 15C are explanatory views of the operation of the adhesive removing mechanism and the cutter in the decorative paper supply device.

FIG. 16 is a processing flowchart at the end of the operation of the manufacturing system.

FIG. 17 is a schematic configuration diagram of a pressure-sensitive adhesive circulating coating apparatus according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Contents 16 ... Box main body 22 ... Lid box 28 ... Box main body manufacturing mechanism 34 ... Lid box manufacturing mechanism 40 ... Host computer 52 ... Adhesive circulation coating apparatus 54 ... Decorative paper supply apparatus 56 ... Adhesive 58 ... Adhesive storage Tanks 61, 82a to 82m Heater 62 Heating tank 64 Viscosity controller 66 (66a to 66d) Coating unit 68 Supply pump 70 (70a to 70d) Return pump 72 Temperature controller 78 Stirrer 80 Hot water supply Vessels 84a-84
m: pipelines 86a to 86d: buffer 98: coating roller 106: doctor blade 108a, 1
08b ... convex part 110 ... concave part 112 ... decorative paper raw material 116 ... backup roller 118 ... final conveyor 120 ... sticking conveyor 122 ... cutter 124 ... adhesive removing mechanism 130, 132, 134, 136 ... vacuum unit 131 ... feeding pipe 138: guide member 148, 150 ... cylinder 158, 16
0: felt member 162: felt moving hand 168: box transport mechanism 170: sequence controller

Claims (7)

[Claims] 1. An adhesive circulation coating apparatus for applying an adhesive supplied in a circulating manner to a member to be coated, wherein: an adhesive storage tank for storing the adhesive; A viscosity controller that controls the pressure-sensitive adhesive, a coating unit that applies the pressure-sensitive adhesive to the member to be coated, and a pressure-sensitive adhesive circulating transport for circulating and transporting the pressure-sensitive adhesive between the pressure-sensitive adhesive storage tank and the coating unit. A pressure-sensitive adhesive circulating coating apparatus, comprising: a path; a pump for circulating and conveying the pressure-sensitive adhesive; 2. The pressure-sensitive adhesive circulating coating apparatus according to claim 1, wherein the pressure-sensitive adhesive storage tank, the coating unit, and the circulating conveyance path include a heating unit. 3. The apparatus according to claim 1, wherein the viscosity controller detects a viscosity of the adhesive,
A pressure-sensitive adhesive circulating coating apparatus, wherein a diluent is added to the pressure-sensitive adhesive so that the viscosity becomes a predetermined viscosity. 4. The apparatus according to claim 1, wherein the pump is a supply pump that supplies the adhesive to the coating unit, and a return pump that supplies the adhesive to the adhesive storage tank. And a pressure-sensitive adhesive circulating coating device. 5. The pressure-sensitive adhesive circulating coating apparatus according to claim 1, wherein the pressure-sensitive adhesive heating means is a coil-shaped heater wound around the circulation path. 6. An adhesive storage tank in which the adhesive is stored, and the adhesive applied to the member to be applied, prior to applying the circulated adhesive to the member to be coated. After heating a coating unit to be applied and a circulation conveyance path connecting the pressure-sensitive adhesive storage tank and the coating unit to a predetermined temperature, the pressure-sensitive adhesive is supplied to the coating unit. Coating method. 7. The method according to claim 6, wherein the viscosity of the adhesive heated to a predetermined temperature is detected,
A pressure-sensitive adhesive circulating coating method, wherein a diluent is added to make the viscosity a predetermined viscosity.