JP2823478B2 - Conveyance processing device for sheet material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for performing a predetermined process on a running sheet while sealing the loading and unloading sides of a processing housing with a sealing gas. The present invention relates to a transfer processing apparatus such as a drying furnace for performing inert drying of a coated surface.

[0002]

2. Description of the Related Art Conventionally, for example, in the production of a pressure-sensitive adhesive tape, a coating liquid containing a pressure-sensitive adhesive is applied onto a sheet-like substrate, and the substrate coated with the coating liquid is placed in a drying oven. By carrying in, there is an important step of forcibly evaporating the volatile solvent in the coating liquid, but as a configuration of the drying furnace,
For example, the one shown in FIG. 6 is known.

The drying oven shown in FIG. 1 is used to apply a belt-transfer type adhesive, and is disposed adjacent to a carry-in port 31 and a carry-out port 32 of a drying furnace main body 30 which is a processing case. In addition, a pair of sealing housings 34 and 35 and 36 and 37 of the same specification are provided so as to sandwich the endless coating belt 33 vertically. Endless coating belt 3
The belt 3 is wound around a pair of left and right belt drums 38 and 39 and travels. The belt 3 moves between the right belt drum 39 and transfer rolls 40 and 41 provided in the vicinity thereof. The adhesive is transferred onto the base tape 42.

Therefore, the coating liquid extracted from the extraction port 44 of the coating section 43 provided on the side of the carry-in port 31 and substantially at the top of the belt drum 38 is applied on the endless coating belt 33. After that, the injection nozzles 45 and 46 (the sealing on the side of the carry-out port 32) which pass between the sealing housings 34 and 35 and face each other at the same position provided in the sealing housings 34 and 35. The same applies to the ejection nozzles 47 and 48 of the casings 36 and 37). The sealed state of the casings 34 and 35 as a demarcation, in other words, the inside of the drying furnace main body 30 and the outside air Are configured to be in a cutoff state. In this case, since the solvent is expensive,
The solvent evaporated from the coating surface side of the belt 33 in the housing 34, the drying furnace main body 30 or the like is recovered by a recovery device (not shown) and reused.

[0005]

However, in the above-mentioned prior art configuration, the sealing casings 34, 3 on the carry-in entrance 31 side are not provided.
5 have the same shape, and are provided in a vertically symmetrical state with a predetermined coating portion of the belt 33 interposed therebetween, so that the extraction port 44 of the coating unit 44 provided at least at a position substantially at the top of the belt drum 38 The coating surface portion 33A over a predetermined distance La (for example, when the coating width of the coating liquid is approximately 1300 mm, approximately 400 mm) La to the tip of the sealing housing 34 is almost completely exposed.

Therefore, the coating surface portion 33A on the upstream side of the sealing housing 34, in other words, the coating liquid extracted from the extraction port 44 until the coating liquid reaches the sealing housings 34 and 35. In between, the coating liquid applied on the belt 33 evaporates outside the recovery device, and the recovery efficiency of the solvent is reduced correspondingly.

Further, sealing housings 34 and 35 provided adjacent to the carry-in entrance 31 and the carry-out exit 32, respectively, and 3
6, 37 are formed in the same specification including the arrangement state of the ejection nozzles 45 to 48.

Accordingly, the ejection nozzle 43 on the side of the carry-in port 31,
In the case of 44, if the disposition position is closer to the drying furnace 30 side, the amount of the inert gas that enters the drying furnace main body 30 accompanying the traveling of the belt 33 increases, and the inert gas supply for sealing is correspondingly increased. In addition to the necessity of increasing the amount, the gas concentration in the drying furnace main body 30 is reduced, and the solvent recovery efficiency is reduced. In the case of the ejection nozzles 47 and 48 on the side of the carry-out port 32, the more the disposition position is away from the carry-out port 32, the lower the effect of blocking the outside air.

The present invention has been made to solve the above-mentioned problems of the prior art. For example, when the present invention is applied to a drying furnace for performing inert drying of a coated surface, the efficiency of solvent recovery can be increased, and the inert gas It is an object of the present invention to provide a sheet processing apparatus capable of realizing economical use.

[0010]

In order to achieve the above object, the present invention is directed to a processing housing for performing a predetermined process on a carried sheet and carrying out the processing, and a processing housing for the processing housing. A pair of sealing housings provided so as to be respectively adjacent to the carry-in entrance and the carry-out opening, and a sealing gas provided in each of the sealing housings, and sealing gas is supplied to the front side and the back side of the sheet. And a pair of ejection nozzles, each of which discharges along a direction, in the sheet-like body conveyance processing device, wherein one of a pair of ejection nozzles provided in a sealing casing adjacent to the carry-in port is provided. Is characterized in that the position of the ejection nozzle is separated from the position of the other ejection nozzle as much as possible by a predetermined distance in the sheet conveying direction.

[0011] Further, the invention according to claim 2 is a processing housing section for performing a predetermined process on the carried sheet-like body and carrying out the same,
A pair of sealing housings provided so as to be respectively adjacent to the carry-in and carry-out openings of the processing housing portion, and a pair of sealing housings respectively provided in both the sealing housings, and a sealing gas is supplied to the front side of the sheet-like body. And a pair of ejection nozzles for discharging along the sheet width direction on the back side, respectively, wherein the ejection nozzle in the sealing casing on the side adjacent to the carry-in port is connected to the furnace. While being positioned as far away from the body as possible, the ejection nozzle in the housing adjacent to the carry-out port is positioned as close to the furnace body as possible. And

[0012]

In the case where the conveyance processing device is a drying furnace for inert drying of an adhesive tape, one of a pair of sealing housings on the entrance side, for example, a sealing housing on a coating surface side of a coating belt as a sheet-like body. The upstream tip of the body is located as close to the coating part as possible as compared to the upstream tip of the sealing housing on the back side, so the coating liquid extracted from the coating part is When the coating surface is applied to the coating surface of the coating belt, the coating surface portion immediately faces the downstream side of the ejection nozzle of the sealing casing, so that most of the solvent in the coating liquid is recovered by the recovery device. become able to.

In this case, an ejection nozzle provided in the sealing casing on the back side of the coating belt as a sheet-like body on the carry-in side is provided at a position as far as possible from the carry-in port.
Further, when the nozzle in the sealing casing on the carry-out port side is provided as close as possible to the carry-out port, it is possible to prevent the sealing gas from entering the drying furnace main body, which is the processing casing section, and to provide a seal. Effective sealing with gas can be performed.

[0014]

FIG. 1 shows a configuration of an embodiment of the present invention. A transport processing apparatus according to the present invention is used for manufacturing an adhesive tape, and is an inert material for applying a belt transfer type adhesive. This is applied as a drying oven for drying. A relay housing 3 is provided adjacent to the entrance 2 of the drying furnace main body 1 serving as a processing housing. Further, the coating portion of the endless belt 4 is provided on the front and back sides (upper and lower sides in the figure) of the relay housing 3. ), Sealing housings 5 and 6 are provided adjacent to each other.

Both of the sealing housings 5 and 6 are tapered in side view but are formed asymmetrically. The upper sealing housing 5 is positioned in the belt running direction of the endless coating belt 4. The length along the side is formed longer than the lower housing 6. The top end of the upper casing 5 opposite to the drying furnace main body 1 faces the extraction port 9 of the coating unit 8 provided immediately above the top of the belt drum 7. I have.

FIG. 2 shows the surface condition of the belt 4 in the vicinity of the coating section 8. The upper and lower jet nozzles 10 and 11 are located at upper and lower positions (front and back sides) of the coating surface section 4A. Is provided. Both ejection nozzles 10, 11
Are provided in the sealing casings 5 and 6, respectively, and extend in a direction along the belt width direction of the belt 4, and have a curtain-like shape ejected from a slit-like ejection port. The inert gas partitions the space (upstream and downstream) before and after in the belt running direction.

The upper and lower jet nozzles 10,
Numeral 11 is arranged in a state of being offset in the belt running direction, and the end sides of both ejection nozzles 10 and 11 are connected to inert gas supply units 12 and 13, respectively (see FIG. 3).

As shown in FIG. 2, in this embodiment,
The housing width Sa along the belt width direction of the sealing housings 5 and 6 is 1
700 mm, the belt width Sb of the endless coating belt 4 is 150
0 mm, the length Sc along the belt width direction of the upper ejection nozzle 10 is set to 1400 mm, and the coating width Sd of the coating surface portion 4A in the belt width direction is set to 1320 mm, while the upper ejection nozzle 10 and the lower ejection nozzle 11 Offset distance Se
(See FIG. 1) is set to 250 mm.

The jet nozzles 10 and 11 are provided inside the sealing casings 5 and 6, respectively, near the tip end. On the other hand, as shown in FIG. 1
4 also includes a pair of upper and lower sealing housings 1 via a relay housing 15.
6 and 17 are provided, and the ejection nozzles 18 and 19 provided in each of the casings 16 and 17 are each provided with the outlet 14.
It is provided near.

Next, the operation of the embodiment constructed as described above will be described. As shown in FIG. 3, when the coating liquid extracted from the coating unit 8 is dropped on the upper surface along the belt width direction of the endless coating belt 4, the coating liquid is ejected upward immediately downstream of the drop line 20. Since the curtain-shaped inert gas is released from the nozzle 10, the coating surface portion 4A immediately after the coating is included on the downstream side of the curtain-shaped inert gas. That is, most of the solvent evaporating from the coating surface portion 4A is to be collected by the collection device, and the collection efficiency can be increased.

In this case, the lower ejection nozzle 11 on the lower surface side of the belt 4 is provided so as to retreat downstream of the upper ejection nozzle 12 in relation to the relationship with the belt drum 7. Needless to say, the nozzle 11 is located on the opposite side to the coating surface portion 4A and is not directly related to the recovery of the solvent, but is provided at a position as far as possible from the carry-in port 2. Therefore, it is possible to prevent the released curtain-like inert gas from entering the carry-in port 2.

On the other hand, as shown in FIG. 4, the ejection nozzles 18 and 19 provided in the sealing casings 16 and 17 adjacent to the carry-out port 14 are provided at vertically symmetric positions with the belt 4 interposed therebetween. However, since both nozzles 18 and 19 are brought as close to the carry-out port 14 as possible, it is possible to effectively seal the carry-out port 14 with inert gas, that is, in a state where the sealing effect is enhanced.

In this case, the belt 4
Is traveling in a direction away from the drying furnace main body 1, the inert gas discharged from the blowing nozzle 19 flows back into the drying furnace main body 1 even if the ejection nozzle 19 is provided at a position close to the carry-out port 14. Never.

That is, in the configuration of this embodiment, the inert gas discharged from the ejection nozzles 10 and 11, and 16 and 17 can be used exclusively for sealing, and the use efficiency of the inert gas can be improved.

As described above, one embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and a design change or the like may be made without departing from the gist of the present invention. Included in the invention.

For example, in the above description, the case where the transfer processing apparatus is applied to a drying furnace in the production of an adhesive tape has been described, but a cooling furnace using an inert gas as a sealing gas,
Also applicable to heat treatment furnaces and the like.

In the above description, the production of the pressure-sensitive adhesive tape is described as an example of a belt transfer method, but the present invention is also applicable to a method of directly applying a pressure-sensitive adhesive coating liquid to a base sheet. . FIG. 5 shows the outline, and the base sheet 21 provided on the carry-in side and traveling is provided.
The upper and lower sealing housings 22 and 23 are arranged on the upstream side of the lower sealing housing 23.

However, if the supply of the traveling base sheet 21 is cut off or the base sheet 21 is cut for some reason during processing, the sealing action by the jet nozzles 24 and 25 becomes impossible. In this embodiment, the base sheet 21
A seal auxiliary member 26 made of, for example, a steel plate or the like is provided between the housing 23 and the lower sealing housing 23.

[0029]

As described above, according to the first aspect of the present invention, a processing casing for carrying out a predetermined process on a conveyed sheet-like body and carrying out the same, a carrying-in port of the processing casing, and a carrying-out section. A pair of sealing housings provided so as to be adjacent to the outlets and to sandwich the sheet-like body, respectively, and provided on both sealing housings, and a sealing gas is supplied to the surface of the sheet-like body. And a pair of ejection nozzles for discharging along the sheet width direction on the side and the back side, respectively. Of the ejection nozzles, the position of one ejection nozzle is characterized by being separated from the position of the other ejection nozzle as much as possible by a predetermined distance in the direction of transport of the sheet-like body. Conveyance processing equipment applied to drying oven for inert drying of adhesive tape If, coating downstream of the portion immediately following coating liquid is to be contained in the downstream side of the seal gas, thereby improving the recovery efficiency of the solvent in the coating liquid.

According to the second aspect of the present invention, a processing casing for performing predetermined processing on the conveyed sheet-like body and carrying out the processing is provided, and each of the processing casing is adjacent to the entrance and the exit of the processing casing. As described above, a pair of sealing housings provided so as to sandwich the sheet-like body, and provided on both sealing housings, respectively, and a sealing gas is provided on the front side and the back side of the sheet-like body. In a sheet-like body conveyance processing device comprising a pair of ejection nozzles each of which discharges along a sheet width direction, an ejection nozzle in a sealing casing adjacent to the carry-in port is movable from the furnace body. While being positioned as far as possible in the direction, the ejection nozzle in the housing adjacent to the carry-out port is characterized as being positioned as close to the direction as possible as close to the furnace body as possible, Waste of sealing gas into the drying furnace body, which is the processing case It can be reduced, thereby improving the use efficiency of at least that much the blanketing gas.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing a configuration near a carry-in side in a drying furnace for inert drying according to an embodiment of the present invention.

FIG. 2 is a partial plan view showing a positional relationship and the like between a coating surface portion on a belt and an ejection nozzle and the like in FIG.

FIG. 3 is a perspective view in the positional relationship shown in FIG. 2;

4 is a main part side view showing a configuration near a carry-out port side of the drying furnace in FIG. 1;

FIG. 5 is a schematic side view showing the configuration of another embodiment of the present invention.

FIG. 6 is a main part side view showing a configuration of a conventional drying furnace for inert drying.

[Explanation of symbols]

 Reference Signs List 1 drying oven main body, 2 carrying-in port, 4 endless coating belt, 5, 16 upper casing for sealing, 6, 17 lower casing for casing, 10, 11, 18, 19 jet nozzle, 14 outlet.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F26B 21/00

Claims (2)

(57) [Claims] 1. A processing case for carrying out a predetermined process on a sheet-like body carried in and out, and a sheet-like body so as to be adjacent to a carry-in port and a carry-out port of the processing case-like part, respectively. And a pair of sealing housings provided so as to sandwich the sealing member, and both sealing housings are respectively provided to discharge sealing gas along the sheet width direction on the front side and the back side of the sheet-shaped body. In the sheet-shaped body transport processing device including a pair of ejection nozzles, the position of one of the ejection nozzles among the pair of ejection nozzles provided in the sealing housing on the side adjacent to the carry-in port, A sheet processing apparatus for conveying a sheet, wherein the apparatus is separated from a position of the other ejection nozzle by a predetermined distance as much as possible in a conveying direction of the sheet. 2. A processing case for carrying out a predetermined process on a sheet-like body carried in and carrying out the sheet-like body, and the sheet-like body so as to be adjacent to a carry-in port and a carry-out port of the processing case part, respectively. And a pair of sealing housings provided so as to sandwich the sealing member, and each of the sealing housings is provided on both sealing housings, and discharges a sealing gas along the sheet width direction on the front side and the back side of the sheet-like body, respectively. In the sheet-like body transfer processing device including a pair of ejection nozzles, the ejection nozzle in the sealing casing on the side adjacent to the carry-in port is moved toward a direction as far as possible from the furnace body. The sheet processing apparatus according to claim 1, wherein the ejection nozzle in the housing adjacent to the carry-out port is positioned as close to the furnace body as possible.