JP4325005B2 - DF coater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a DF coater (Direct-Fountain-Coater) apparatus for continuously producing processed paper or the like in which a pressure-sensitive paint or the like is directly applied to the surface of a tape-like base paper.
[0002]
[Prior art]
Conventionally, processed paper such as pressure-sensitive paper is manufactured by a DF coater.
[0003]
FIG. 5 is a side view of the DF coater.
In the figure, reference numeral 1 denotes a feeding roll around which a tape-like base paper 6 is wound. Reference numeral 2 denotes a winding roll for winding the base paper 6. Reference numerals 3 and 3 denote a pair of guide rollers for guiding the gap between the feed roll 1 and the take-up roll 2 substantially horizontally. Reference numeral 4 denotes a header provided between the guide rollers 3 and 3. Reference numeral 5 denotes a coating liquid such as a pressure-sensitive paint continuously flowed down from the header 4 to the upper surface of the base paper 6, and reference numeral 5 a denotes a coating film obtained by coating the upper surface of the base paper 6 with the coating liquid 5. Reference numeral 7 denotes a fixing unit such as a heater provided on the downstream side of the header 4. Reference numeral 8 denotes an accompanying air flow generated on the surface of the base paper 6 as the base paper 6 is conveyed. The base paper 6 may be conveyed at a high speed of about 1,000 m / min in order to increase the manufacturing efficiency of the processed paper.
[0004]
[Problems to be solved by the invention]
However, since the DF coater transports the base paper at a high speed of about 1,000 m / min, an entrained air flow that flows toward the downstream side is generated on the surface of the base paper. As a result, the coating film is greatly disturbed by the entrained air flow, making it impossible to perform good coating, and there is a problem that the quality of the processed paper is deteriorated.
[0005]
The present invention was devised to solve the above-described problems, and reliably blocks the entrained air flow generated on the surface of the base paper to eliminate the adverse effect on the coating of the entrained air flow. An object of the present invention is to provide a DF coater device.
[0006]
[Means for Solving the Problems]
According to the present invention, there is provided a DF coater device for coating a coating film on the upper surface of a base paper by continuously flowing a coating liquid in a film form from above a tape-like base paper flowing almost horizontally. An air shielding plate for blocking the entrained air flow generated on the surface of the base paper is disposed upstream of the coating portion, and the wind shielding plate is attached to the front end of the supporting member and the supporting member. There is provided a DF coater device comprising a blade having a flat portion in contact with the surface of the base paper, a smooth bent portion in the middle, and a plurality of air holes in the bent portion.
[0007]
The flat portion of the blade is preferably bent at the tip upward.
[0008]
The blade is preferably made of a metal such as stainless steel.
[0009]
Next, the operation of the present invention will be described.
As described above, on the upstream side of the coating film coating portion, the tip has a flat portion that contacts the surface of the base paper, the middle has a smooth bent portion, and the bent portion has a large number of ventilation holes. Since a windshield plate having a blade is arranged and the blade is brought into contact with the surface of the base paper to reliably block the entrained air flow generated on the surface of the base paper, the paint film can be prevented from being disturbed, Therefore, it is possible to perform good coating with a uniform coating film thickness, and to improve the quality of the processed paper. Since the entrained air flow generated on the surface of the base paper may be pushed between the blade and the base paper and pass through the wind shielding plate, it is discharged upward by the vent hole. Since the blade is in surface contact with the surface of the base paper, the surface of the base paper is not damaged and the generation of paper dust can be prevented.
[0010]
Since the air flow that has passed through the ventilation holes may hit the coating liquid, it is preferable to wind the blade by bending the blade tip upward.
[0011]
Since these blades are made of metal such as stainless steel, they are less worn. The tip of the blade is preferably arranged so as to be located about 30 mm upstream of the coating location.
[0012]
[Embodiments of the Invention]
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of the DF coater of the present invention. FIG. 2 is a partially enlarged view of FIG. Members common to those shown in FIG. 5 as the prior art will be described using the same reference numerals.
[0013]
In the figure, reference numeral 1 denotes a feeding roll around which a tape-like base paper 6 is wound. Reference numeral 2 denotes a winding roll for winding the base paper 6. Reference numerals 3 and 3 denote a pair of guide rollers for guiding the gap between the feed roll 1 and the take-up roll 2 substantially horizontally. Reference numeral 4 denotes a header provided between the guide rollers 3 and 3. Reference numeral 5 denotes a coating liquid such as a pressure sensitive agent continuously flowed down from the header 4 to the upper surface of the base paper 6. Reference numeral 5 a denotes a coating film obtained by coating the upper surface of the base paper 6 with the coating liquid 5. Reference numeral 7 denotes a fixing unit such as a heater provided on the downstream side of the header 4. Reference numeral 8 denotes an accompanying air flow generated on the surface of the base paper 6 as the base paper 6 is conveyed. Reference numeral 9 denotes a coating portion of the coating film 5 that has flowed down to the upper surface of the base paper 6.
[0014]
Reference numeral 10 denotes a wind shielding plate disposed on the upstream side of the coating portion 9. The wind shielding plate 10 is attached to the support member 10a and the tip of the support member 10a, and has a flat portion 11a that contacts the surface of the base paper 6 at the tip, and has a smooth bent portion 11b in the middle, and the bent portion 11b. And a blade 11 having a large number of air holes 11c, and is in contact with the surface of the base paper 6. It is preferable to open the vent hole 11c upward because the entrained air flow 8 flows upward.
[0015]
3 is a side view of a DF coater device showing another embodiment of the present invention, and FIG. 4 is a partially enlarged view of FIG.
In the figure, reference numeral 10 denotes a wind shielding plate disposed on the upstream side of the coating location 9, and has a support member 10 a and a flat portion 12 a that is attached to the tip of the support member 10 a and contacts the surface of the base paper 6 at the tip. The front end of the flat surface portion 12a is bent upward, and has a smooth curved portion 12b in the middle and a blade 12 having a number of vent holes 12c in the curved portion 12b. It comes to contact. Since the air hole 12c is opened obliquely upward toward the downstream side in the flow direction of the base paper 6, since the air flow that has passed through the air hole 12c may hit the coating liquid 5, the air is blocked by the bent portion 12c. . The other configurations are the same as those shown in FIG.
[0016]
The tips of these blades 11 and 12 are preferably arranged so as to be located about 30 mm upstream of the coating site 9.
[0017]
Next, the operation of this embodiment will be described.
In this way, on the upstream side of the coating portion 9 of the coating film 5a, there is a flat portion 11a in contact with the surface of the base paper 6 at the tip, a smooth bent portion 11b in the middle, and the bent portion 11b A wind shielding plate 10 having a blade 11 having a large number of ventilation holes 11c is provided, and the blade 11 is brought into contact with the surface of the base paper 6 so as to reliably block the entrained air flow 8 generated on the surface of the base paper 6. Therefore, it is possible to prevent the coating film 5a from being disturbed, and thus it is possible to perform a good coating with a uniform coating film 5a thickness and to improve the quality of the processed paper. Since the entrained air flow 8 generated on the surface of the base paper 6 may be pushed between the blade 11 and the base paper 6 and pass through the wind shielding plate 10, it is discharged upward through the vent hole 11c. Since the blade 11 is in surface contact with the surface of the base paper 6, the surface of the base paper 6 is not damaged and the generation of paper dust can be prevented.
[0018]
Since the air flow 8 that has passed through the vent hole 12d may hit the coating liquid 5, it is preferable to wind the blade 12 by bending the tip end upward.
[0019]
Since these blades 11 and 12 are made of metal such as stainless steel, they are less worn. The tips of the blades 11 and 12 are preferably arranged so as to be located about 30 mm upstream of the coating site 9.
[0020]
The present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.
[0021]
【The invention's effect】
As described above, according to the present invention, a windshield plate having a blade having a large number of ventilation holes is disposed upstream of the coating film coating portion, and the blade is brought into surface contact with the surface of the base paper. Since the entrained air flow generated on the surface of the base paper is surely cut off, it is possible to prevent the coating film from being disturbed, and thus it is possible to perform a good coating with a uniform coating film thickness, Excellent effects such as improvement of the quality of the processed paper can be achieved.
[Brief description of the drawings]
FIG. 1 is a side view of a DF coater device according to the present invention.
FIG. 2 is a partially enlarged view of FIG.
FIG. 3 is a side view of a DF coater device showing another embodiment of the present invention.
4 is a partially enlarged view of FIG. 3;
FIG. 5 is a side view of a conventional DF coater device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Feeding roller 2 Take-up roller 3 Guide roller 4 Header 5 Paint liquid 5a Paint film 6 Base paper 7 Fixing part 8 Accompanying air flow 9 Coating location 10 Wind shield 10a Support member 11, 12 Blades 11c, 12d Vent

Claims (3)

A DF coater apparatus by flow down continuously from the upper tape-like base paper a coating solution into a film coating the coating film on the upper surface of the base paper that flows substantially horizontally, close to the coating point of the coating film And a windshield plate that is provided upstream and blocks the entrained air flow generated on the surface of the base paper, and the windshield plate is a flat plate disposed in a downward gradient in the flow direction of the base paper. And a blade attached to the tip of the support member, the blade having a gradient portion having the same gradient as the support member, a flat portion contacting the surface of the base paper, the gradient portion and the flat surface consists of a smoothly curved portion interposed between the parts, DF coater apparatus, wherein a plurality of vent holes to flow toward the blocked entrained air flow upward is provided in the curved portion.   2. The DF coater device according to claim 1, wherein the flat portion of the blade has a tip bent upward.   The DF coater device according to claim 1 or 2, wherein the blade is made of metal such as stainless steel.

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